CN114397083A - Method and device for testing air performance of external-discharge type range hood - Google Patents
Method and device for testing air performance of external-discharge type range hood Download PDFInfo
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Abstract
The invention relates to an air performance test method and a device of an external exhaust type range hood, wherein the air performance test method of the range hood is based on whether the current air performance test of the range hood is a full curve test and respectively executes a full curve test or a non-full curve test, and when the full curve test is executed, a pore plate is adjusted to a zero-number inner hole, then the air performance tests of the range hood corresponding to all inner holes on the pore plate are sequentially executed, and test data are recorded; once the non-full-curve operation is executed, the number value of the target inner hole is obtained, the orifice plate is controlled to rotate to the position of the target inner hole from the inner hole with the current number, then the air performance test of the range hood aiming at the target inner hole is executed, test data is recorded, the non-full-curve test is finished, so that the full-curve test of the outer-exhausting type range hood is met, the non-full-curve test of the outer-exhausting type range hood is met, and the automation degree and the accuracy of the air performance test of the outer-exhausting type range hood are improved.
Description
Technical Field
The invention relates to the field of range hoods, in particular to an air performance test method and device for an external-discharge range hood.
Background
The external-discharge type range hood, which is a common range hood form different from the internal-discharge type range hood, has become a necessary device for most household kitchens. Through the work of the external exhaust type range hood, the oil smoke in the kitchen environment can be discharged outdoors in time, so that the air in the kitchen environment is kept clean. At present, the external exhaust type range hood generally needs to test the air performance of the range hood in the process of a factory so as to reach certain air volume and air pressure and meet the national standard.
At present, an air performance test of an external exhaust type range hood is usually completed by a tester in a mode of manually operating an air performance test device of the external exhaust type range hood. The existing external exhaust type range hood air performance test device mainly comprises a connector, a rectifier, a diffusion section, a pressure reducing cylinder and other airflow circulation main bodies, wherein a plurality of continuously numbered open pores (or called inner pores) are arranged on a pore plate at the downstream of the pressure reducing cylinder, and the open pores are sequentially arranged on the pore plate from small to large according to the pore diameter.
Chinese invention patent CN103852339B discloses an automatic pore plate changing device, a method and an external exhaust type range hood air performance test device with the device. This automatic trade orifice plate device includes controlling means, first gear motor, second gear motor, the apparatus further comprises a rotating shaft, the orifice plate dish, a plurality of circular orifice plates, the subaerial groove that is equipped with certain degree of depth, second gear motor's output shaft passes through drive mechanism and is connected with the pivot transmission, the pivot passes the orifice plate dish perpendicularly and rather than central part fixed connection, the pivot is through at least two bearing and first support and the second support rotatable coupling of difference fixed connection on first support and second support, the radome fairing, with radome fairing fixed connection's a diffusion section of thick bamboo, all be fixed in the frame with a section of thick bamboo fixed connection's a decompression section of thick bamboo, a terminal top fixed connection mounting bracket of a decompression section of thick bamboo, it installs photoelectric switch sensor's luminous end and receiving terminal respectively in the both sides of orifice plate dish. Wherein:
during the initial test, after the machine is started, the main control module judges whether the first limit switch is disconnected or blocks light, if so, the step four is carried out, and if not, the main control module instructs the first speed reduction motor driving module to enable the first speed reduction motor to rotate and the step is circulated until the first limit switch is disconnected or blocks light and the step three is carried out; the purpose is to ensure that the circular orifice plate does not collide with the tail end of the pressure reducing cylinder when the orifice plate disc rotates. And the main control module judges whether the photoelectric switch sensor is in light, if so, the step six is carried out, if not, the step is circulated until the photoelectric switch sensor is in light blocking, the second speed reducing motor stops rotating, and the purpose of the test under the state of the circular hole plate with the inner hole diameter of 0 is firstly carried out.
However, the above patent CN103852339B still has some problems: the air performance test scheme of the range hood disclosed by the patent CN103852339B essentially belongs to a full curve test, namely, the air performance test of the range hood is sequentially carried out according to the pore size sequence of each inner hole on a pore plate; once the non-full curve test is required, that is, the air performance test of the range hood is not required to be performed in sequence according to the pore size sequence of each inner pore on the pore plate, but the air performance test of the range hood is performed on any target inner pore on the pore plate, the air performance test scheme of the range hood in the patent CN103852339B obviously cannot meet the requirement of the non-full curve test.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide an external exhaust type range hood air performance test method which can meet the full curve test of an external exhaust type range hood and also can meet the non-full curve test aiming at the prior art.
The second technical problem to be solved by the invention is to provide an external exhaust type range hood air performance test device for realizing the external exhaust type range hood air performance test method.
The technical scheme adopted by the invention for solving the first technical problem is as follows: the method for testing the air performance of the external-discharge type range hood is characterized by comprising the following steps of:
step 1, judging whether the current air performance test of the range hood is a full curve test or not:
when the test is a full curve test, the step 2 is carried out; otherwise, turning to step 5;
step 2, controlling the orifice plate to rotate to the inner hole with the number of zero from the current state, executing an air performance test of the range hood aiming at the inner hole with the number of zero, recording test data, and turning to the step 3; wherein, all inner holes on the pore plate are sequentially numbered in ascending order according to the order of the pore size from small to large in advance;
step 3, controlling the orifice plate to continuously rotate from the inner hole with the current number to the inner hole with the next number according to the numbering sequence, executing an air performance test of the range hood aiming at the inner hole with the next number, recording test data, and turning to the step 4;
step 4, circularly executing the step 3 until the air performance test of the range hood aiming at the inner hole with the maximum number value is finished, recording test data and finishing the full curve test;
step 5, acquiring the number value of the target inner hole, and controlling the orifice plate to rotate to the target inner hole from the inner hole with the current number;
and 6, executing an air performance test of the range hood aiming at the target inner hole, recording test data, and ending the non-full curve test.
Further, in the method for testing the air performance of the external exhaust type range hood, in the step 2, the process of controlling the orifice plate to rotate from the current state to the inner orifice with the number of zero comprises the following steps:
acquiring the maximum number value of all numbered inner holes on the pore plate, and acquiring the total number of the inner holes on the pore plate;
judging and processing according to the current inner hole number value of the current state of the pore plate and the total number of the obtained inner holes:
when the two meet the preset condition, the orifice plate is controlled to rotate to the inner hole with the number of zero according to the first rotating direction; otherwise, controlling the orifice plate to rotate to the inner hole with the number of zero according to the second rotation direction; the first rotating direction and the second rotating direction are opposite to each other.
In the method for testing the air performance of the external exhaust type range hood, the preset condition is that the total number of the inner holes is greater than or equal to the mean value of the maximum number value and the value 1, the first rotating direction is clockwise, and the pore plate rotates to the number of the pore plate 1 according to the first rotating directionThe angle to be rotated at the inner hole of zero is marked by ω1：
N is the maximum number value of all the numbered inner holes, N is the current inner hole number value of the current state of the pore plate, and N is more than or equal to 0 and less than or equal to N.
In a further improvement, in the air performance test method of the external exhaust type range hood, the second rotation direction is counterclockwise, and the angle of rotation of the orifice plate to the inner hole with the number of zero according to the second rotation direction is marked as omega2：
N is the maximum number value of all the numbered inner holes, N is the current inner hole number value of the current state of the pore plate, and N is more than or equal to 0 and less than or equal to N.
And improving, in the air performance test method of the external exhaust type range hood, in the step 3, the pore plate is controlled to continuously rotate to the next numbered inner hole from the currently numbered inner hole according to the preset rotation angle according to the numbering sequence.
Further, in the method for testing the air performance of the external exhaust type range hood, the preset rotation angle is
In step 5, the process of controlling the orifice plate to rotate from the inner hole with the current number to the target inner hole comprises the following steps 51-55:
step 51, judging the numerical value of the current number value and the target inner hole number value:
when the current number value is less than or equal to the target inner hole number value, go to step 52; otherwise, go to step 54;
step 52, calculating a number difference value between the number value of the target inner hole and the current number value, and turning to step 53; the number value of the target inner hole is marked as m, the number value of the current inner hole is marked as N, the number difference value is marked as delta, the delta is m-N, m is more than or equal to 0 and less than or equal to N, and N is more than or equal to 0 and less than or equal to N;
step 53, according to the obtained number difference, making judgment:
when the number difference satisfies
Then, the aperture plate is controlled to rotate according to the third rotation direction
To rotate to the target inner hole; otherwise, controlling the rotation angle of the orifice plate according to the fourth rotation direction
To rotate to the target inner hole; the third rotation direction and the fourth rotation direction are opposite to each other;
step 54, calculating the number difference between the number value of the target inner hole and the current number value, and turning to step 55; the number value of the target inner hole is marked as m, the number value of the current inner hole is marked as N, the number difference value is marked as delta, the delta is m-N, m is more than or equal to 0 and less than or equal to N, and N is more than or equal to 0 and less than or equal to N;
step 55, according to the obtained number difference, judging:
when the number difference satisfies
Then, the aperture plate is controlled to rotate according to the third rotation direction
To rotate to the target inner hole; otherwise, controlling the rotation angle of the orifice plate according to the fourth rotation direction
To rotate to the target inner hole。
The technical scheme adopted by the invention for solving the second technical problem is as follows: the external exhaust type range hood air performance testing device for realizing the external exhaust type range hood air performance testing method comprises a connector, a rectifier, a diffusion section and a pressure reducing cylinder, wherein a pore plate is arranged at the downstream of the pressure reducing cylinder, and a plurality of continuously numbered inner holes are formed in the pore plate.
Further, in the air performance testing device of the external exhaust type range hood, the rotating mechanism comprises:
the reversing gear set is connected with the pore plate and drives the pore plate to rotate;
and the driving motor is connected with the control end and is in transmission connection with the reversing gear set.
Still further, in the air performance testing device of the external exhaust type range hood, the driving motor is a servo motor.
Compared with the prior art, the invention has the advantages that:
firstly, the air performance test method of the external exhaust type range hood can automatically adjust the air performance test method to the full curve test requirement or the non-full curve test requirement of the external exhaust type range hood until the full curve test operation or the non-full curve test operation is executed, and the whole test operation is executed fully automatically, so that the automation degree of the air performance test of the external exhaust type range hood is improved;
secondly, because the full curve test operation and the non-full curve test operation executed by the invention do not need a tester to adjust the pore plate to rotate and adjust the test inner hole number at the control terminal to be consistent with the actual inner hole number in the test state, the whole process is completely executed by the control terminal, the situation that the actual test inner hole number is inconsistent with the recorded inner hole number due to human negligence is avoided, the accuracy of the air performance test data of the outer exhaust type range hood is further improved, and the efficiency of the air performance test of the range hood is also improved.
Drawings
FIG. 1 is a schematic flow chart of an air performance test method of an external exhaust type range hood in an embodiment of the invention;
fig. 2 is a schematic view of the arrangement relationship between the rotating mechanism and the orifice plate in the embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The embodiment provides an air performance test method for an external exhaust type range hood. Specifically, referring to fig. 1, the method for testing the air performance of the external exhaust type range hood in the embodiment includes the following steps 1-6:
step 1, judging whether the current air performance test of the range hood is a full curve test or not:
when the test is a full curve test, the step 2 is carried out; otherwise, the non-full curve test is executed, and the step 5 is carried out;
step 2, controlling the orifice plate to rotate to the inner hole with the number of zero from the current state, executing an air performance test of the range hood aiming at the inner hole with the number of zero, recording test data, and turning to the step 3; wherein, all inner holes on the pore plate are sequentially numbered in ascending order according to the order of the pore size from small to large in advance;
specifically, in the orifice plate of this embodiment, the numbering order of the inner holes is from number 0, numbering in ascending order, to the maximum number N, that is, the inner holes on the orifice plate are number 0 inner holes, number 1 inner holes, number 2 inner holes, …, N-1 inner holes, and number N inner holes, respectively, and the hole diameter of the number 0 inner hole is zero, that is, the number 0 inner hole is not perforated at all but is positioned as a standard of one orifice plate; the aperture of the No. 1 inner hole is smaller than that of the No. 2 inner hole, the aperture of the No. 2 inner hole is smaller than that of the No. 3 inner hole, and the like, and the aperture of the No. N-1 inner hole is smaller than that of the No. N inner hole;
for example, if the number 3 inner hole on the orifice plate is just communicated with the pressure reducing cylinder before the orifice plate is formally rotated, that is, the orifice plate is in the current state (which can be regarded as the initial state), then the orifice plate needs to be controlled to rotate so that the number 0 inner hole on the orifice plate is just communicated with the pressure reducing cylinder, and then the range hood air performance test for the inner hole with the number zero is executed, and the test data is recorded;
more specifically, in step 2 of this embodiment, the process of controlling the orifice plate to rotate from the current state to the inner orifice numbered zero includes the following steps a1 to a 2:
a1, acquiring the maximum number value of all numbered inner holes on the pore plate, and acquiring the total number of the inner holes on the pore plate; the maximum number value of all numbered inner holes on the pore plate is marked as N, and the total number of the inner holes on the pore plate is N + 1;
step a2, judging and processing according to the current inner hole number value n of the current state of the orifice plate and the total number of the obtained inner holes:
when the two satisfy the preset condition, namely the preset condition is set as that the current inner hole number value n is larger than or equal to the average value of the maximum number value and the value 1
The control pore plate rotates to the inner hole with the number of zero according to the first rotating direction; otherwise, controlling the orifice plate to rotate to the inner hole with the number of zero according to the second rotation direction; the first rotation direction is clockwise, and the second rotation direction is counterclockwise. The angle at which the perforated plate is rotated in the first direction of rotation to the zero-numbered inner bore is denoted by ω1The angle of rotation of the orifice plate to the zero-numbered inner hole in the second direction of rotation is marked as ω2：
Step 3, controlling the orifice plate to continuously rotate to the next numbered inner hole from the currently numbered inner hole according to the numbering sequence and a preset rotation angle, executing an air performance test of the range hood aiming at the next numbered inner hole, recording test data, and turning to the step 4; wherein the preset rotation angle is
After the air performance test of the range hood aiming at the No. 0 inner hole is finished and the test data is recorded in the step 2, continuously controlling the pore plate to rotate until the No. 1 inner hole on the pore plate is just communicated with the decompression cylinder, then, finishing the air performance test of the range hood aiming at the No. 1 inner hole again and recording the test data;
step 4, circularly executing the step 3 until the air performance test of the range hood aiming at the inner hole with the maximum number value is finished, recording test data and finishing the full curve test;
the step 3 is executed for multiple times, namely after the air performance test of the range hood with one numbered inner hole is executed each time and the test data is recorded, the pore plate is continuously rotated to the next numbered inner hole, so that the next numbered inner hole is communicated with the decompression cylinder, and thus, the air performance test of the range hood aiming at the N numbered inner holes is executed and the test data is recorded, so that the full-curve test operation is completed;
step 5, acquiring the number value of the target inner hole, and controlling the orifice plate to rotate to the target inner hole from the inner hole with the current number; in the step 5, the process of controlling the orifice plate to rotate from the inner hole with the current number to the target inner hole comprises the following steps 51-55:
step 51, judging the numerical value of the current number value and the target inner hole number value:
when the current number value is less than or equal to the target inner hole number value, go to step 52; otherwise, go to step 54; the number value of the current inner hole of the inner hole with the current number is marked as N, the number value of the target inner hole is marked as m, m is more than or equal to 0 and less than or equal to N, and N is more than or equal to 0 and less than or equal to N;
step 52, calculating a number difference value between the number value m of the target inner hole and the current number value n, and turning to step 53; the number difference of the current inner hole number value is marked as delta, and the delta is m-n;
step 53, judging according to the obtained number difference value Δ:
when it is used asNumber difference satisfies
Then, the aperture plate is controlled to rotate according to the third rotation direction
Rotating to the target inner hole with the number m; otherwise, controlling the rotation angle of the orifice plate according to the fourth rotation direction
Rotating to the target inner hole with the number m; the third rotation direction and the fourth rotation direction are opposite to each other; specifically, the third rotation direction is counterclockwise, and the fourth rotation direction is clockwise;
step 54, calculating the number difference between the number value m of the target inner hole and the current number value n, and turning to step 55; the number value of the target inner hole is marked as m, the number value of the current inner hole is marked as N, the number difference value is marked as delta, the delta is m-N, m is more than or equal to 0 and less than or equal to N, and N is more than or equal to 0 and less than or equal to N;
step 55, according to the obtained number difference, judging:
when the number difference satisfies
Then, the aperture plate is controlled to rotate according to the third rotation direction
To rotate to the target inner hole; otherwise, controlling the rotation angle of the orifice plate according to the fourth rotation direction
To rotate to the target hole.
And 6, executing an air performance test of the range hood aiming at the target inner hole, recording test data, and ending the non-full curve test.
The embodiment also provides an air performance test device of the external exhaust type range hood, which realizes the air performance test method of the external exhaust type range hood. Specifically, the air performance test device of the external exhaust type range hood comprises a connector, a rectifier, a diffusion section, a pressure reducing cylinder provided with a pore plate 1, a control end and a rotating mechanism for driving the pore plate 1 to rotate, wherein a plurality of continuously numbered inner holes 10 are formed in the pore plate 1, the rotating mechanism comprises a reversing gear set 21 and a driving motor 22, the driving motor 22 adopts a servo motor and can drive the rotating mechanism to rotate clockwise or anticlockwise, and the reversing gear set 21 is connected with the pore plate 1 and drives the pore plate 1 to rotate; the driving motor 22 is connected with the control end, and the driving motor 22 is in transmission connection with the reversing gear set 21. The arrangement relationship between the rotating mechanism and the orifice plate is shown in fig. 2.
Claims (10)
1. The method for testing the air performance of the external-discharge type range hood is characterized by comprising the following steps of:
step 1, judging whether the current air performance test of the range hood is a full curve test or not:
when the test is a full curve test, the step 2 is carried out; otherwise, turning to step 5;
step 2, controlling the orifice plate to rotate to the inner hole with the number of zero from the current state, executing an air performance test of the range hood aiming at the inner hole with the number of zero, recording test data, and turning to the step 3; wherein, all inner holes on the pore plate are sequentially numbered in ascending order according to the order of the pore size from small to large in advance;
step 3, controlling the orifice plate to continuously rotate from the inner hole with the current number to the inner hole with the next number according to the numbering sequence, executing an air performance test of the range hood aiming at the inner hole with the next number, recording test data, and turning to the step 4;
step 4, circularly executing the step 3 until the air performance test of the range hood aiming at the inner hole with the maximum number value is finished, recording test data and finishing the full curve test;
step 5, acquiring the number value of the target inner hole, and controlling the orifice plate to rotate to the target inner hole from the inner hole with the current number;
and 6, executing an air performance test of the range hood aiming at the target inner hole, recording test data, and ending the non-full curve test.
2. The method for testing the air performance of the external exhaust type range hood according to claim 1, wherein in the step 2, the process of controlling the orifice plate to rotate from the current state to the inner orifice with the number of zero comprises the following steps:
acquiring the maximum number value of all numbered inner holes on the pore plate, and acquiring the total number of the inner holes on the pore plate;
judging and processing according to the current inner hole number value of the current state of the pore plate and the total number of the obtained inner holes:
when the two meet the preset condition, the orifice plate is controlled to rotate to the inner hole with the number of zero according to the first rotating direction; otherwise, controlling the orifice plate to rotate to the inner hole with the number of zero according to the second rotation direction; the first rotating direction and the second rotating direction are opposite to each other.
3. The method for testing the air performance of an external exhaust type range hood according to claim 2, wherein the preset condition is that the total number of the inner holes is greater than or equal to the average value of the maximum number value and the number 1, the first rotating direction is clockwise, and the angle of rotation of the orifice plate to the inner hole with the number of zero according to the first rotating direction is marked as ω1：
N is the maximum number value of all the numbered inner holes, N is the current inner hole number value of the current state of the pore plate, and N is more than or equal to 0 and less than or equal to N.
4. The method for testing the air performance of an external-exhausting range hood according to claim 3, wherein the second rotating direction is counterclockwise, and the orifice plate rotates according to the second rotating directionThe angle to be rotated to the inner hole numbered zero is marked by ω2：
N is the maximum number value of all the numbered inner holes, N is the current inner hole number value of the current state of the pore plate, and N is more than or equal to 0 and less than or equal to N.
5. The method for testing the air performance of the external exhaust type range hood according to any one of claims 1 to 4, wherein in the step 3, the orifice plate is controlled to continue to rotate from the inner hole with the current number to the inner hole with the next number according to the numbering sequence and the preset rotation angle.
6. The method for testing the air performance of an external exhaust type range hood according to claim 5, wherein the preset rotation angle is
7. The method for testing the air performance of the external exhaust type range hood according to claim 1, wherein in the step 5, the process of controlling the orifice plate to rotate from the inner hole with the current number to the target inner hole comprises the following steps 51-55:
step 51, judging the numerical value of the current number value and the target inner hole number value:
when the current number value is less than or equal to the target inner hole number value, go to step 52; otherwise, go to step 54;
step 52, calculating a number difference value between the number value of the target inner hole and the current number value, and turning to step 53; the number value of the target inner hole is marked as m, the number value of the current inner hole is marked as N, the number difference value is marked as delta, the delta is m-N, m is more than or equal to 0 and less than or equal to N, and N is more than or equal to 0 and less than or equal to N;
step 53, according to the obtained number difference, making judgment:
when the number difference satisfies
Then, the aperture plate is controlled to rotate according to the third rotation direction
To rotate to the target inner hole; otherwise, controlling the rotation angle of the orifice plate according to the fourth rotation direction
To rotate to the target inner hole; the third rotation direction and the fourth rotation direction are opposite to each other;
step 54, calculating the number difference between the number value of the target inner hole and the current number value, and turning to step 55; the number value of the target inner hole is marked as m, the number value of the current inner hole is marked as N, the number difference value is marked as delta, the delta is m-N, m is more than or equal to 0 and less than or equal to N, and N is more than or equal to 0 and less than or equal to N;
step 55, according to the obtained number difference, judging:
when the number difference satisfies
Then, the aperture plate is controlled to rotate according to the third rotation direction
To rotate to the target inner hole; otherwise, controlling the rotation angle of the orifice plate according to the fourth rotation direction
To rotate to the target hole.
8. The air performance testing device of the external exhaust type range hood for realizing the air performance testing method of the external exhaust type range hood according to any one of claims 1 to 7 comprises a connector, a rectifier, a diffusion section and a pressure reducing cylinder, wherein a pore plate (1) is arranged at the downstream of the pressure reducing cylinder, a plurality of inner holes (10) which are continuously numbered are arranged on the pore plate (1), and the air performance testing device is characterized by further comprising a control end and a rotating mechanism for driving the pore plate (1) to rotate, wherein the control end is connected with the rotating mechanism.
9. The air performance testing device of the external exhaust type range hood according to claim 8, wherein the rotating mechanism comprises:
the reversing gear set (21) is connected with the pore plate (1) and drives the pore plate (1) to rotate;
and the driving motor (22) is connected with the control end, and the driving motor (22) is in transmission connection with the reversing gear set (21).
10. The air performance testing device of the external exhaust type range hood according to claim 9, wherein the driving motor (22) is a servo motor.
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