CN110763450B - Constant air volume function test method - Google Patents
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- CN110763450B CN110763450B CN201911101040.4A CN201911101040A CN110763450B CN 110763450 B CN110763450 B CN 110763450B CN 201911101040 A CN201911101040 A CN 201911101040A CN 110763450 B CN110763450 B CN 110763450B
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- G01M13/00—Testing of machine parts
Abstract
The invention provides a constant air volume function testing method, which comprises the following steps: under the condition that the tool is not used, testing set rotating speeds corresponding to target air volume under different set static pressures, and storing test data into a storage module; under the condition of connecting the tool, testing the position information of the set wind shield corresponding to the set static pressure corresponding to the set rotating speed at different set rotating speeds, and storing the test data into the storage module; running a constant air volume test system according to the data stored in the storage module, and testing the corresponding actual air volume when the static pressure, the rotating speed and the position information of the wind deflector are correspondingly set; and comparing the actual air quantity with the target air quantity to finish the constant air quantity function test. The invention simulates the air duct used by the actual user by using the wind shield, and has simple and convenient test method and high test efficiency and accuracy.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a constant air volume function testing method.
Background
With the continuous improvement of the living standard of people, the air conditioner becomes an indispensable electric appliance in families. Meanwhile, the requirements of people on the performance of the air conditioner are gradually improved, and as an indoor unit closest to a user, the user feels most intuitive on the air volume, and the experience of the user is directly influenced by the difference of the air volume.
Because the air ducts of the air duct machine have different lengths, and the static pressure in the air ducts is different under the same motor rotating speed, the air quantity of the air outlet can have difference, and users feel that the air quantity has obvious difference, so the development of the constant air quantity function of the air duct machine becomes a trend in the industry. However, due to the characteristic that the enthalpy difference laboratory pressure regulating fan regulates static pressure in real time, the constant air volume function test of the air duct type air conditioner with different air duct lengths cannot be carried out on a test bed.
Disclosure of Invention
The invention solves the problem that the prior art can not directly test the constant air volume function of the air duct machines with different lengths on a test bed.
In order to solve the problems, the invention provides a constant air quantity function test method, which adopts a constant air quantity test system to test the constant air quantity function of an air pipe unit, wherein the constant air quantity test system comprises a tool and a test bed air box, a static pressure instrument is arranged on the tool, and a wind shield for controlling the size of an air opening of the tool is arranged in the tool; the constant air volume function test method comprises the following steps:
step 2, testing the corresponding set rotating speed when the target air volume is reached under different set static pressures, and storing the corresponding data of the set static pressure and the set rotating speed into a storage module;
step 3, connecting the air pipe unit, the tool and the test bed air box in sequence;
step 4, testing the corresponding set wind shield position information when the set static pressure corresponding to the set rotating speed is reached under different set rotating speeds, and storing the corresponding set static pressure and the data of the set wind shield position information to a storage module;
step 5, operating the constant air volume test system according to the corresponding set static pressure, set rotating speed and the data of the position of the wind deflector stored in the storage module and the storage module, and testing the corresponding actual air volume when the corresponding set static pressure, set rotating speed and position information of the wind deflector are stored;
and 6, comparing the actual air volume with the target air volume to finish the constant air volume function test.
The wind screen arranged in the tool is used for simulating the wind channel used by an actual user, and the wind channel with different lengths used by the user is simulated by moving the wind screen to change the size of the wind port of the tool. The invention firstly stores the corresponding relation between the static pressure and the rotating speed required by reaching the target air volume in the storage module, then finds the corresponding relation between the static pressure, the rotating speed and the air baffle position information by means of the air baffle position information through a tool, enters a constant air volume function mode, measures the actual air volume, and judges whether the constant air volume function is achieved or not by comparing the actual air volume with the target air volume. The method provided by the invention is simple and convenient, and has high testing efficiency and accuracy.
Further, the step 4 specifically includes: firstly, the rotating speed of the motor is adjusted to the set rotating speed stored in the storage module, the static pressure meter is used for detecting the current static pressure, and the position of the wind shield is adjusted to enable the current static pressure to be equal to the set static pressure corresponding to the set rotating speed stored in the storage module.
Thus, the corresponding relation between the position information of the wind shield and the set static pressure can be obtained.
Further, the step 4 further includes: and when the current static pressure is detected to be lower than the set static pressure which is stored in the storage module and corresponds to the set rotating speed, the wind shield is moved to reduce the tooling air opening, otherwise, the wind shield is moved to increase the tooling air opening.
The static pressure is adjusted by moving the position of the wind shield, and the adjusting mode is simple and easy to operate.
Further, the step 5 specifically includes: adjusting the position of the wind shield to the set wind shield position information stored in the storage module, adjusting the rotating speed of the motor to the set rotating speed by the air pipe unit, adjusting the static pressure to the set static pressure, and measuring the actual air volume respectively.
Therefore, the actual air volume under different static pressures can be obtained, so that the judgment of constant air volume can be conveniently carried out.
Further, in the step 5, after the air duct unit automatically adjusts the rotation speed of the motor to the set rotation speed, the method further includes: and opening a balance induced draft fan of the constant air volume test system, and closing the air door of the test bench air box, wherein the balance induced draft fan is connected with the test bench air box.
Therefore, a constant air volume function mode is entered, so that the actual air volume is conveniently measured.
Further, the step 6 specifically includes: obtaining an absolute deviation value of the air volume according to the actual air volume and the target air volume, wherein d [ | V [ ]х-V|/V]×100％，VхAnd V is the actual air volume, V is the target air volume, and d is the absolute deviation value of the air volume.
The degree of the actual air volume deviating from the target air volume can be judged according to the absolute deviation value of the air volume, and further the judgment of the constant air volume function is facilitated.
Further, the step 6 specifically includes: and comparing the air quantity absolute deviation value with a preset deviation absolute value, and judging that the air pipe unit has a constant air quantity function when the air quantity absolute deviation value is smaller than or equal to the preset deviation absolute value.
Therefore, whether the constant air volume function is achieved or not can be judged through simple comparison of numerical values, and the judgment mode is simple and easy to operate.
Further, still include after connecting in proper order tuber pipe unit, frock, test bench bellows in step 3: and closing a balance induced draft fan of the constant air volume test system, and opening an air door of the test bed air box.
And closing the balance induced draft fan to avoid the influence of the balance induced draft fan on the static pressure in the test bed air box, and opening an air door of the test bed air box to communicate the test bed air box with the atmosphere and ensure that the static pressure of an air outlet is 0Pa for simulating the scene of an actual user.
Furthermore, the wind shield is inserted into the tool through the side wall of the tool, and the set wind shield position information is the distance between one end, far away from the tool, of the wind shield and the side wall of the tool.
The mode of the wind shield position information is characterized by measuring the distance between the end part of the wind shield and the side wall of the tooling, and the wind shield is simple and easy to operate.
Further, the set static pressure is a static pressure value selected at intervals of a preset value within the range of 0 and the maximum design static pressure.
Therefore, the air quantity under different static pressures can be obtained within the maximum design static pressure range, and the constant air quantity function judgment is carried out.
Drawings
FIG. 1 is a structural view of a constant air volume test system according to an embodiment of the present invention;
fig. 2 is a flowchart of a constant air volume function testing method in the embodiment of the present invention.
Description of reference numerals:
1-air pipe machine set; 2, assembling; 3-test bed bellows; 4-balancing the induced draft fan;
21-a wind deflector; 22-static pressure gauge.
Detailed Description
In order to realize that the air outlet of the air duct machine has constant air volume, the static pressures required in air ducts with different lengths are different, and generally, high static pressure is required in a long air duct and low static pressure is required in a short air duct. However, the static pressure of the pressure regulating fan in the enthalpy difference laboratory is regulated in real time, so that the static pressure in the air pipe is always kept at a certain fixed pressure value, and therefore, under the same motor rotating speed and different air pipe lengths, the air quantity of the air outlet is different, and the constant air quantity function of the air pipe machine cannot be directly tested on a test bed.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment of the invention provides a constant air quantity function test method, which adopts a constant air quantity test system to test the constant air quantity function of an air pipe unit 1, as shown in figure 1, the constant air quantity test system comprises a tool 2 and a test bed air box 3, a static pressure instrument 22 is arranged on the tool 2, and a wind shield 21 for controlling the size of an air port of the tool 2 is arranged in the tool 2; as shown in fig. 2, the constant air volume function test method includes the following steps:
step 2, testing the corresponding set rotating speed when the target air volume is reached under different set static pressures, and storing the data of the corresponding set static pressure and the set rotating speed into a storage module;
step 3, connecting the air pipe unit 1, the tool 2 and the test bed air box 3 in sequence;
step 4, testing the position information of the corresponding set wind shield 21 when the set static pressure corresponding to the set rotating speed is reached under different set rotating speeds, and storing the data of the corresponding set static pressure and the position information of the set wind shield 21 into a storage module;
step 5, operating the constant air volume test system according to the corresponding set static pressure, set rotating speed and air deflector 21 position data stored in the storage module and the storage module, and testing the corresponding actual air volume when the corresponding set static pressure, set rotating speed and air deflector 21 position information are set;
and 6, comparing the actual air quantity with the target air quantity to finish the constant air quantity function test.
In the embodiment, the wind shield 21 in the tool 2 is used for simulating the wind channel when the user uses the wind shield, and the wind shield 21 is moved to change the size of the wind port of the tool 2, so that the length of the wind channel when the user uses the wind shield actually is simulated. When the wind shield 21 is moved to reduce the wind gap of the tool 2, the resistance is increased, the rotating speed of the motor needs to be increased to ensure that the wind quantity is unchanged, so that the pressure in the tool 2 is increased, and the long wind pipe is simulated at the moment. When the wind shield 21 is moved to increase the wind gap of the tool 2, the resistance is reduced, the rotating speed of the motor needs to be reduced to ensure that the wind quantity is unchanged, so that the pressure in the tool 2 is reduced, and the short wind pipe is simulated at the moment.
In this embodiment, first, under the condition that the tool 2 is not used, the corresponding relationship between the static pressure and the set rotation speed is set under the test of the target air volume, where the target air volume includes the design rated air volumes of the high wind, the medium wind and the low wind of the air duct machine. The static pressure is set to be a static pressure value selected at intervals of a preset value within the range of 0 and the maximum design static pressure. For example, when the high wind target air volume is V and the set static pressure is adjusted to be 100Pa, the rotating speed of the motor is adjusted to enable the air volume to reach the target air volume V, and the rotating speed of the motor at the moment is recorded as the set rotating speed R100Pa. Continuously adjusting the set static pressure to 120Pa to obtain the set rotating speed of R120Pa. Thus, a set of corresponding data between the set static pressure and the set rotational speed is obtained in step 2, as shown in table 1, and stored in the storage module.
TABLE 1
| Static pressure (Pa) | P1 | P2 | P3 | P4 | P5 | P6 | … |
| Rotating speed (high wind/r) | Rh1 | Rh2 | Rh3 | Rh4 | Rh5 | Rh6 | … |
| Rotational speed (apoplexy/r) | Rm1 | Rm2 | Rm3 | Rm4 | Rm5 | Rm6 | … |
| Rotating speed (Low wind/r) | Rl1 | Rl2 | Rl3 | Rl4 | Rl5 | Rl6 | … |
Then, connect frock 2 between air duct unit 1 and test bench bellows 3, adjust the motor speed to the settlement rotational speed of storage in the storage module, detect current static pressure through static pressure appearance 22, through adjusting the deep bead 21 position for current static pressure equals the settlement static pressure that corresponds with the settlement rotational speed of storage in the storage module. For example, the motor speed is adjusted to the set speed R in the storage module100PaAnd the static pressure meter 22 is used for detecting the current static pressure, at the moment, due to the use of the tool 2, the static pressure in the constant air volume test system is changed, so that the current static pressure is not equal to the set rotating speed R100PaCorresponding set static pressure is 100Pa, the position of the wind shield 21 in the tool 2 is adjusted at the moment to enable the detected current static pressure value to be 100Pa, and meanwhile position information such as S of the set wind shield 21 is recorded100Pa. Continuously regulating the rotating speed of the motor to R120PaObtaining the position information S of the set wind shield 21 when the set static pressure reaches 120Pa120Pa. In this way, in step 4, the tool 2 is used to simulate the actual user usage, and a set of corresponding data between the set static pressure and the set position information of the wind deflector 21 is obtained, as shown in table 2, and stored in the storage module.
TABLE 2
| Static pressure (Pa) | P1 | P2 | P3 | P4 | P5 | P6 | … |
| Position of wind guard 21 (mm) | S1 | S2 | S3 | S4 | S5 | S6 | … |
Further, still include after connecting frock 2 between air hose unit 1 and test bench bellows 3: and closing the balance induced draft fan 4 to avoid the influence of the balance induced draft fan 4 on the static pressure in the test bed air box 3, and opening an air door of the test bed air box 3 to ensure that the test bed air box 3 is communicated with the atmosphere and the static pressure of an air outlet is 0Pa to simulate the actual user scene.
Further, the tooling 2 includes tuber pipe and deep bead 21 in this embodiment, and the both ends of tuber pipe respectively with the air outlet of air pipe unit 1 and the 3 entry linkage of test bench bellows, set for deep bead 21 positional information in this embodiment and keep away from the distance between one end of frock 2 and the frock 2 lateral wall for deep bead 21. The number of the wind deflectors 21 is preferably two, the two wind deflectors 21 are respectively inserted into the wind pipe from two opposite side walls of the wind pipe, and an air opening of the tooling 2 is defined between opposite end parts of the two wind deflectors 21. When the positions of the wind deflectors 21 are adjusted, the two wind deflectors 21 move simultaneously, and the moving directions of the two wind deflectors 21 are opposite, so that the positions of the wind deflectors 21 on the two sides of the air duct are kept symmetrical, and the positions of the wind deflectors 21 can be conveniently represented. As shown in fig. 1, the distance x from the two ends of the wind deflector 21 far away from each other to the side wall of the air duct is recorded, and the distance x is the position information of the set wind deflector 21. Of course, if the number of the wind deflectors 21 is one, the position information of the wind deflectors 21 is the distance between one end of the wind deflector 21 outside the air duct and the side wall of the air duct.
Specifically, when the position of the wind shield 21 is adjusted, if the current static pressure is detected to be less than 100Pa, the wind shield 21 is moved from two sides to the middle, so that the air opening of the tooling 2 is reduced to increase the pressure; if the detected current static pressure is larger than 100Pa, the wind shield 21 is moved towards two sides, so that the air opening of the tool 2 is increased to reduce the pressure.
And finally, adjusting the position of the wind shield 21 to the position information of the set wind shield 21 stored in the storage module, automatically adjusting the rotating speed of the motor to a set rotating speed by the air duct unit 1, adjusting the static pressure to a set static pressure, and testing the corresponding actual air volume when the corresponding set static pressure, set rotating speed and position information of the wind shield 21 are set. For example, adjusting the position of the wind deflector 21 to S100PaThe air duct unit 1 automatically adjusts the rotating speed of the motor to R100PaRegulating static pressure to 100Pa, and measuring actual air volume to be V100Pa. Continuing to adjust the position of the windshield 21 to S120Pa Air duct unit 1 is fromDynamically adjusting the motor speed to R120PaRegulating static pressure to 120Pa, and measuring actual air volume to be V120Pa. Thus, in step 5, a set of data corresponding to the set static pressure and the actual air volume is obtained, as shown in table 3, and stored in the storage module.
TABLE 3
| Static pressure (Pa) | P1 | P2 | P3 | P4 | P5 | P6 | … |
| Air volume (m)3/h) | V1 | V2 | V3 | V4 | V5 | V6 | … |
Further, after the air duct unit 1 automatically adjusts the motor speed to the set speed in step 5, before adjusting the static pressure to the set static pressure, the method further includes: and opening the balance induced draft fan 4, and closing an air door of the test bed air box 3 to measure the actual air quantity.
In step 6, the actual air volume V is measuredхAnd comparing the air quantity with the target air quantity V to obtain an absolute deviation value of the air quantity. Thus, a set of corresponding data between the set static pressure and the absolute deviation value of the air volume is obtained in step 5, as shown in table 4. Wherein, the absolute deviation value d [ | V [ ]of the air volumeх-V|/V]×100％。
TABLE 4
| Static pressure (Pa) | P1 | P2 | P3 | P4 | P5 | P6 | … |
| Absolute deviation value of air volume (％) | d1 | d2 | d3 | d4 | d5 | d6 | … |
Step 6 also includes: and comparing the air quantity absolute deviation value with a preset deviation absolute value, and judging that the air pipe unit 1 has a constant air quantity function when the air quantity absolute deviation value is smaller than or equal to the preset deviation absolute value.
The following describes the present embodiment in detail by taking a dc frequency conversion 3P platform air duct machine as an example:
the target air quantity of a high wind shield is designed to be 1400m3And/h, the highest static pressure is designed to be 160Pa, the tested static pressure is between 0 and 160Pa, and preferably the static pressure is tested once every 10Pa, namely the static pressures are set to comprise 0, 10Pa, 20Pa, 30Pa, 40Pa, 50Pa, 60Pa, 70Pa, 80Pa, 90Pa, 100Pa, 120Pa, 130Pa, 140Pa, 150Pa and 160 Pa.
Firstly, connecting an air pipe machine set 1 and an air box 3 of a test bed;
secondly, adjusting static pressure in an air box 3 of the test bed to be 0Pa, 10Pa and 20Pa … … 160Pa respectively, and adjusting the rotating speed to enable the air volume to reach the target air volume of 1400m3H is used as the reference value. Reach 1400m under different static pressures3The rotational speed corresponding to the/h air volume is shown in table 5, and the data are stored in the storage module.
TABLE 5
Thirdly, reconnecting the air pipe unit 1, the tool 2 and the test bed air box 3;
fourthly, closing the balance induced draft fan 4 and opening an air door of the test bed air box 3;
and fifthly, referring to the rotating speed adjusted in the second step, detecting the current static pressure through a static pressure meter 22, adjusting the wind shield 21 to enable the static pressure to be 0Pa, 10Pa, 20Pa … … 150Pa or 160Pa, recording the position of the wind shield 21, and storing the data into a storage module, wherein the position information of the wind shield 21 corresponding to different static pressures is shown in a table 6.
Table 6:
sixthly, adjusting the position of the wind shield 21 to the position tested in the fifth step, and waiting for the air pipe unit 1 to automatically adjust the rotating speed of the motor to the set rotating speed stored in the storage module;
and seventhly, opening the balance induced draft fan 4, closing an air door of the test bed air box 3, adjusting static pressure in the test bed air box 3, respectively measuring actual air volume, recording the corresponding actual air volume under different static pressures as shown in a table 7, and storing the data into a storage module.
TABLE 7
Eighth step, according to the formula d [ | V [ ]х-V|/V]X 100%, calculating the absolute deviation value of the air volume, and the result is shown in table 8; wherein d is the absolute deviation value of the air volume, VхThe actual air volume recorded in the storage module is V which is the target air volume 1400m3H is used as the reference value. And comparing the calculated absolute deviation value of the air quantity with a preset absolute deviation value, and judging that the air pipe unit has a constant air quantity function when the absolute deviation value of the air quantity is less than or equal to the preset absolute deviation value.
TABLE 8
By adopting the method for testing the constant air volume function, the actual deviation of the constant air volume function can be accurately measured, and the method is simple, convenient and high in testing efficiency and accuracy.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A constant air volume function test method is characterized in that a constant air volume test system is adopted to test the constant air volume function of an air pipe unit (1), the constant air volume test system comprises a tool (2) and a test bed air box (3), a static pressure instrument (22) is arranged on the tool (2), and a wind shield (21) for controlling the size of an air opening of the tool (2) is arranged in the tool (2); the constant air volume function test method comprises the following steps:
step 1, connecting the air pipe unit (1) with the test bed air box (3);
step 2, testing the corresponding set rotating speed when the target air volume is reached under different set static pressures, and storing the corresponding data of the set static pressure and the set rotating speed into a storage module;
step 3, sequentially connecting the air pipe unit (1), the tool (2) and the test bed air box (3);
step 4, adjusting the rotating speed of the motor to the set rotating speed stored in the storage module, detecting the current static pressure through the static pressure meter (22), enabling the current static pressure to be equal to the set static pressure corresponding to the set rotating speed stored in the storage module by adjusting the position of the wind shield (21), testing the position information of the set wind shield (21) corresponding to the set static pressure corresponding to the set rotating speed at different set rotating speeds, and storing the corresponding data of the set static pressure and the position information of the set wind shield (21) into the storage module;
step 5, operating the constant air volume test system according to the corresponding set static pressure, set rotating speed and the position data of the wind shield (21) stored in the storage module, and testing the corresponding actual air volume when the corresponding set static pressure, set rotating speed and position information of the wind shield (21) are set;
and 6, comparing the actual air volume with the target air volume to finish the constant air volume function test.
2. The constant-air-volume function testing method according to claim 1, wherein the step 4 further comprises: when the current static pressure is detected to be lower than the set static pressure which is stored in the storage module and corresponds to the set rotating speed, the wind shield (21) is moved to reduce the air opening of the tool (2), otherwise, the wind shield (21) is moved to increase the air opening of the tool (2).
3. The constant-air-volume function testing method according to claim 1, wherein the step 5 specifically comprises: the position of the wind shield (21) is adjusted to the position information of the set wind shield (21) stored in the storage module, the air pipe unit (1) adjusts the rotating speed of a motor to the set rotating speed, adjusts the static pressure to the set static pressure, and measures the actual air volume respectively.
4. The constant-air-volume function testing method according to claim 3, wherein the step 5 further comprises, after the air duct unit (1) automatically adjusts the motor speed to the set speed: opening balance draught fan (4) of the constant air volume test system, closing the air door of the test bed air box (3), wherein the balance draught fan (4) is connected with the test bed air box (3).
5. The constant-air-volume function testing method according to claim 1, wherein the step 6 specifically comprises: and acquiring an air volume absolute deviation value according to the actual air volume and the target air volume, wherein d [ | V х -V |/V ] × 100%, V х is the actual air volume, V is the target air volume, and d is the air volume absolute deviation value.
6. The constant-air-volume function testing method according to claim 5, wherein the step 6 further comprises: and comparing the air quantity absolute deviation value with a preset deviation absolute value, and judging that the air pipe unit (1) has a constant air quantity function when the air quantity absolute deviation value is smaller than or equal to the preset deviation absolute value.
7. The constant-air-volume function testing method according to claim 1, wherein the step 3 further comprises, after the air duct unit (1), the tooling (2) and the test bed air box (3) are sequentially connected: and closing a balance induced draft fan (4) of the constant air quantity testing system, and opening an air door of the test bed air box (3).
8. The constant-air-volume function testing method according to claim 1, wherein the wind deflector (21) is inserted into the tool (2) from the side wall of the tool (2), and the position information of the wind deflector (21) is set as the distance between one end of the wind deflector (21) far away from the tool (2) and the side wall of the tool (2).
9. The constant-air-volume function test method according to any one of claims 1 to 8, wherein the set static pressure is a static pressure value selected at intervals of a preset value within a range of 0 and a maximum design static pressure.
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