KR20060056738A - Eliment detecting method for multi-blade centrifugal fan and multi-blade centrifugal fan made by the method - Google Patents

Abstract

The present invention relates to a centrifugal blower, and more particularly, to a centrifugal blower including an impeller (2), a blade (3), and a scroll (4), a design parameter selection step (S101) and an objective function configuration. A design target set-up step 100 including a step S102 and a constraint condition setting step S103; A design target analysis step (S200) including a grid generation step (S201), a three-dimensional heat flow analysis step (S202), and a result DATA analysis step (S203); Analysis result verification step (S300); A regression analysis step (S400) including a reaction model coefficient determination step (S401) and a reaction model construction step (S402); Reaction model verification step (S500); Element detection method of the centrifugal multi-blister blower comprising an optimal design step (S600) comprising an optimal point determination step (S601) and an optimum design variable determination step (S602) of the reaction function and a centrifugal multi-function blower manufactured by the method (1), the three-dimensional flow analysis that passes through the inside of the centrifugal blower (1) is carried out to examine the effect on the performance in the range of change of the design variables of the impeller (2) and scroll, and based on the three-dimensional flow analysis The optimized design provides a centrifugal multi-purpose blower with superior performance and efficiency.

Centrifugal Blower, Impeller, Scroll, Blade

Description

Element detecting method for centrifugal blower and centrifugal blower manufactured by the method

1 is a schematic illustration of a centrifugal blower according to the present invention.

Figure 2 is an exemplary view of the flow field flow by the centrifugal blower.

3 is an exemplary view of a centrifugal blower formed by the reaction surface technique.

Figure 4 is a flow chart for the element detection method of the centrifugal blower according to the present invention.

Figure 5 is a schematic illustration of the detection of the elements of the centrifugal blower according to the present invention.

Figure 6 shows the numerical values for the reference design parameters of the elements of the centrifugal blower according to the present invention.

Figure 7 shows the design area of the design parameters of the elements of the centrifugal blower according to the present invention.

Figure 8 shows the response surface regression analysis results of the centrifugal blower according to the present invention.

Figure 9 shows the objective function value of the centrifugal blower according to the present invention.

10 shows design variable values of the shape of the centrifugal blower according to the present invention.

11 shows the performance curve of the shape of the centrifugal blower according to the present invention.

12 and 13 compare the flow analysis for the reference shape of the centrifugal blower and the efficiency and performance curves obtained from the experimental results.

* Explanation of Signs of Major Parts of Drawings *

1: centrifugal blower 2: impeller

3: blade 4: scrolling

5: body 6: tongue

The present invention relates to a centrifugal blower, and more particularly, to detect the elements of the centrifugal blower by an optimal design through a three-dimensional flow analysis passing through the centrifugal blower and the inside, so as to provide superior performance and efficiency. It relates to a centrifugal blower.

In general, the blower increases the flow intensity of the wind using gas, in particular air, and is divided into a turbo blower and a volume blower. The dual turbo blower is divided into an axial blower which is energized by the lift force of the blades generated by the rotation of the rotor and a centrifugal blower that is energized by the centrifugal force. Among these blowers, the centrifugal multi-function blower has an inlet port in the center of one side of the cylindrical body as a whole, and forms an outlet port on one side of the circumferential surface, and a blade and a scroll rotating about an axis centered on the inner cylinder of the cylindrical body. It is formed of an impeller or the like. Thus, the blade, which is provided with a plurality of small blades, is inclined to one side and rotated so as to suck air into the center of the cylindrical impeller formed in the plurality of blades and push it outward.

In the centrifugal blower provided as described above, the centrifugal blower is centrifugal due to various factors such as rapid change in main flow in the impeller, flow asymmetry along the impeller circumferential direction, pressure gradient around the tongue, and flow in the scroll. The flow and efficiency inside the blower could not be predicted. In addition, there is a problem that can not be equipped with an efficient optimal centrifugal blower.

In order to solve the above problems, the present invention performs a three-dimensional flow analysis that passes through the inside of the centrifugal blower to examine the effect on the performance in the range of change of the design variables of the impeller and the scroll and optimizes the design based on the three-dimensional flow analysis. The purpose of the present invention is to provide a centrifugal blower having excellent performance and efficiency by configuring an optimized centrifugal blower based on a more precise flow analysis technique.

In order to achieve the above object, the present invention provides a centrifugal blower including an impeller, a blade, and a scroll, comprising: a design target setting step including a step for design variable selection, a step for constructing an objective function, and a step for setting a constraint condition; A design object analysis step including a grid generation step, a three-dimensional heat flow analysis step, and a result data analysis step; Verifying the analysis result; A regression analysis step comprising a reaction model coefficient determination step and a reaction model construction step; A response model verification step; An element detection method of a centrifugal multi-purpose blower including an optimal design step including an optimal point determination step and an optimal design variable decision step of a reaction function is provided.

가 임펠러의 각속도이며, 효율

이Accordingly, the object function constituting step of the present invention, Ps is a constant pressure, subscript in and ex represent the inlet and outlet of the blower, respectively, Q is the flow rate,

Is the angular velocity of the impeller,

this

일 때,

when,

The present invention provides a method for detecting urea of a centrifugal blower which is a step constituted by an objective function.

In addition, when the reaction model construction step x _i is a design variable, i and j is the number of design variables,

It provides a method for detecting the element of the centrifugal blower comprising a step by the reaction model formed by.

Another embodiment of the present invention provides a centrifugal blower including an impeller, a blade, and a scroll, wherein the centrifugal blower is formed by an element detected by the element detection method of the centrifugal blower.

At this time, the impeller inner diameter detected in one embodiment is 200mm to 300mm preferably 266mm, impeller outer diameter 300mm to 320mm preferably 310mm, impeller width 0.600mm to 0.630mm preferably 0.615mm, the number of impeller 45 50 to 50 is preferably provided, and the scroll magnification angle, which is the element detected by another embodiment, is 7.00 degrees to 8.00 degrees, preferably 7.86 degrees, and the scroll and impeller mounting portion is 79.5 degrees to 81.5 degrees, preferably 80.9 degrees. The present invention provides a centrifugal blower having a scroll and impeller tongue radius of 13.0 mm to 14.0 mm and preferably 13.4 mm.

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention will be described in detail as follows.

That is, the element detection method of the present invention centrifugal blower shown in FIG. 1 and the centrifugal blower 1 formed by the elements detected by the present invention are the impeller 2, the blade 3, and the scroll 4. It is provided.

과 같이 지수함수로 나타낼 수 있다. 이때 지수함수의

가 증가함에 따라 스크롤 확장각(

)에 의한 도 1과 같이 유동단면적이 증가하게 되고, 그 결과 스크롤 내부를 지나는 유체의 속도에너지는 압력에너지로 바뀌게 된다. 임펠러(2)와 스크롤(4)과의 간극이 가장 좁은 곳을 설부(cutoff, 6)라 하며, 스크롤(4)은 설부(6)의 원주방향위치(

)에서의 임펠러(2)와 간격을 기준으로 설치된다.Therefore, the centrifugal blower 1 for allowing the gas introduced into the inlet portion formed on one flat surface to flow out to the outlet portion formed on one side of the circumferential surface with respect to the main body 5 formed in a cylindrical shape as a whole is a cylindrical body 5. It was provided with an impeller (2) rotated about an axis formed on one side of the central portion. At this time, the impeller 2 is formed of a blade (3) which is a plurality of wings to suck the gas with a strong suction force to discharge. The scroll 4 collects the gas discharged from the impeller 2 and sends it to the discharge port of the scroll 4, the shape of which is illustrated in FIG. 6.

It can be expressed as an exponential function as Where the exponential function

As the scroll expand angle (

As shown in FIG. 1, the flow cross-sectional area is increased, and as a result, the velocity energy of the fluid passing through the inside of the scroll is converted into pressure energy. The narrowest gap between the impeller 2 and the scroll 4 is called cutoff 6, and the scroll 4 is located at the circumferential position of the tongue 6.

It is installed on the basis of the impeller (2) and the gap in the).

The impeller 2 of the centrifugal blower 1 thus formed is formed by components such as inner radius d1, outer radius d2, and width b of the size of the portion where the blade 3 is formed. do. That is, as shown in FIG. 2, the centrifugal multi-purpose blower 1 shows a flow field flow flowing out to one side after the fluid sucked to one side of the three-dimensional shape is rotated along the circumferential surface.

<Example>

The present invention centrifugal multi-purpose blower (1) is provided with a three-dimensional Reynolds-averaged Navier-Stokes Analysis (RANS) flow analysis method according to the three-dimensional computational fluid dynamics and physical or numerical value to model the experimental value or objective function as a smooth polynomial function It is based on the numerical optimal design technique based on the response surface technique, which is a series of mathematical statistical techniques using the results obtained through the numerical experiments. And the impeller due to the change in the momentum of the main flow in the impeller (2), the shape of the scroll (4) due to the asymmetric geometric shape that the flow cross-sectional area is the narrowest and the flow cross-section gradually increases along the circumferential direction in the tongue (6) Flow asymmetry in the circumferential direction of, detection by very large pressure gradient around tongue 6, the narrowest distance between scroll 4 and impeller 2, and strong three-dimensional flow inside scroll 4. The type of centrifugal blower can be determined by these factors.

Therefore, the present invention is based on the geometrical elements such as the width of the impeller 2, the radius and the position of the tongue 6, which are elements detected by the element detection method of the centrifugal blower 1 by the numerical optimum design technique as described above. A centrifugal blower 1 is provided.

) 및 반경(

)을 선택하였고, 임펠러(2)에 대해서 폭(b)을 선택하고, 추가로 송풍기의 운전과 관련된 유량을 포함하는 설계 변수 선정 단계(S101)와, 유체기계의 형상변화에 따른 성능의 변화를 정량화하고 그 크기를 서로 비교함으로써 이를 최대화할 수 있도록 목적함수로써 설정하는 목적함수 구성 단계(S102)와, 도 6에 나타낸 반응면 구성을 위해 필요한 실험점을 얻고자 선택한 각 설계변수에 대한 영역과 무차원 비속도 등의 한계를 결정하는 제한 조건 설정 단계(S103)를 포함하여 설계 대상 셋업 단계(100)를 구성하였다. 그리고 도 3에 도시된 바와 같이, 중심부에서 30×18×18, 임펠러부에서 6×66×20 그리고 스크롤부에서 96×12×20개의 세 블록으로 분할하여 대수적인 방법으로 계산격자를 구성하는 다중블록시스템을 적용함으로써 원심다익송풍기(1)의 복잡한 기하학적 형상에 대한 유동해석을 수행하기 위한 격자 생성 단계(S201)와, 표준 k-ε 난류모델을 사용하여 비압축성 난류유동의 삼차원 Reynolds-averaged Navier-Stokes방정식을 계산하고자 지배방정식들을 비직교곡선좌표계로 변환하였으며 유한체적법으로 이산화한 후, 선형대수방정식의 계산에 SIP(Strongly Implicit Procedure), 압력계산에 SIMPLEC 알고리듬을 사용하는 삼차원 열유동 해석 단계(S202)와 상기 제한조건 설정 단계(S103)에서 선택된 각 실험점에 대해서 상기 삼차원 유동 해석 단계(S202)를 거쳐 얻어진 결과로부터 상기 목적함수 구성 단계(S102)에서 정의된 효율을 계산하는 결과 DATA 분석 단계(S203)를 포함하는 설계 대상 해석 단계(S200)를 구성하였다. 또한 상기 유동 해석 단계(S202)에서 사용된 해석 방법의 타당성을 검증하고자 기준 형상에 대한 삼차원 유동해석 결과와 실험결과를 비교하는 해석 결과 검증 단계(S300)를 구성하고, 다항식으로 정의된 반응함수(y=Xβ+ε)의 계수(β) 값을 결정하는 단계로써 여기서 y는 실험을 통해 얻어진 반응(response)의 (n×1)벡터이고, X는 독립변수(independent variable)의 (n×p)벡터이며, β는 회귀상수의 (p×1)벡터이고, ε은 오차의 (n×1)벡터로 되어, 수치 오차(ε_i)의 제곱을 최소화하기 위하여 오차의 제곱 함수를 구하면,1 and 4, the element detection method of the centrifugal blower 1 including the impeller 2, the blade 3 and the scroll 4 is known to have a sensitive effect on performance. Position of tongue 6 with respect to scroll 4 with geometric design parameters (

) And radius (

), Select the width (b) for the impeller (2), and further select the design parameter selection step (S101) including the flow rate associated with the operation of the blower, and the performance change according to the shape change of the fluid machine An objective function construction step (S102) for quantifying and comparing the magnitudes with each other and maximizing them, and an area for each design variable selected to obtain an experimental point necessary for the response surface configuration shown in FIG. The design target set-up step 100 was configured including a constraint setting step S103 for determining a limit such as dimensionless specific speed. As shown in FIG. 3, the multiplexing block is divided into three blocks of 30 × 18 × 18 at the center, 6 × 66 × 20 at the impeller, and 96 × 12 × 20 at the scroll. Three-dimensional Reynolds-averaged Navier for incompressible turbulent flow using a grid generation step (S201) and a standard k- ε turbulence model for performing flow analysis on the complex geometrical shape of the centrifugal blower 1 by applying the block system. In order to calculate the Stokes equation, the governing equations are transformed into non-orthogonal curve coordinate system, and after discretizing by finite volume method, the three-dimensional thermal flow analysis step using the SIP (Strongly Implicit Procedure) for the linear algebraic equation and the SIMPLEC algorithm for the pressure calculation From the results obtained through the three-dimensional flow analysis step (S202) for each experimental point selected in (S202) and the constraint setting step (S103) Results of calculating the efficiency, defined by the function configuration step (S102) was constructed to the design target analysis step (S200) comprises the DATA analysis step (S203). In addition, to verify the validity of the analysis method used in the flow analysis step (S202) to configure the analysis result verification step (S300) for comparing the experimental results with the three-dimensional flow analysis results for the reference shape, the reaction function ( determining the value of the coefficient β of y = Xβ + ε, where y is the (n × 1) vector of the response obtained from the experiment, and X is the (n × p) of the independent variable. ), Β is the (p × 1) vector of the regression constant, ε is the (n × 1) vector of the error, and the square function of the error is obtained to minimize the square of the numerical error (ε _i )

And the function L is called the least square normal equation in order to be the least square function.

을 평가하고, 정확도가 떨어지는 항을 제거함으로써 반응모델의 신뢰도를 높이고 예측성을 향상시켜, 이때 Satisfying the equation of, which is composed of p equations, and the response model coefficient determination step (S401) of determining the unidentified coefficients b ₀ , b ₁ , ...... b _k satisfying the simultaneous equations A regression analysis step S400 including a reaction model construction step S402 constituting a reaction model using coefficients is configured. The uncertainty of the microcrystal coefficient obtained in the regression analysis step (S400) is evaluated using t-statistic, which is the inverse of the ratio of the standard deviation in the value of the coefficient, and the effect of any term on the reliability of the overall response model.

To improve the reliability and predictability of the response model by eliminating the less accurate terms.

의 최대값은 1.0이며, 클 수록 정확한 반응모델이 구성되며, 상기 회귀분석 단계(S400)에서 얻어진 t-statistics과

의 값을 비교함으로써 반응모델이 실제 반응함수를 잘 반영하고 있는 지를 검사하는 반응모델 검증 단계(S500)를 구성한 것이다. 상기 회귀분석 단계(S400)에서 얻어진 반응함수로부터 선형 계획법을 사용하여 함수의 최대 혹은 최소값을 탐색하는 반응함수의 최적점 결정 단계(S601)와 상기 반응함수의 최적점 결정 단계(S601)로부터 목적함수가 최대 혹은 최소가 되는 위치에서의 설계변수의 최적값을 결정하는 최적설계변수 결정 단계(S602)를 포함하는 최적설계 단계(S600)를 구성하여 원심다익송풍기(1)의 요소 검출하는 원심다익송풍기(1)의 요소 검출 방법을 구성한 것이다.Where SS _E is the sum of squared errors, S _yy is the sum of squared response functions,

The maximum value of is 1.0, the larger the more accurate response model is composed, the t-statistics and the obtained in the regression analysis step (S400)

By comparing the values of the reaction model verification step (S500) to check whether the reaction model reflects the actual reaction function well. From the response function obtained in the regression analysis step (S400) using the linear programming method to determine the optimum point of the response function to find the maximum or minimum value of the function (S601) and the target function from the determination of the optimal point of the response function (S601) Is a centrifugal element for detecting the elements of the centrifugal blower 1 by constructing an optimal design step S600 including an optimal design variable determining step S602 for determining an optimum value of a design variable at a position where the maximum or minimum value is maximum. The element detection method of the blower 1 is comprised.

In the present invention, a mathematical model of impeller force is used to save the computation time required for flow analysis. 5, the radial force f _r and the circumferential force f _c of the force f by the blade 3 acting within the impeller 2 block in the impeller 2 model, as shown in FIG. 5. ) Is provided by flow rate and flow conditions at the inlet and outlet of the impeller 2 as follows. In other words,

은 각각 질량 유량, d는 임펠러(2) 반경,

는 각속도,

는 유동각,

은 미끄럼계수,

는 밀도,

는 평균 유동 단면적, c는 원주방향 유동 속도,

는 날개 회전속도,

은 반경,

는 검사 체적 그리고

은 임펠러 효율이며, 하첨자 1과 2는 각각 임펠러(2)의 입구와 출구를 나타낸다.It is provided as, wherein

Is the mass flow rate respectively, d is the radius of the impeller (2),

Is the angular velocity,

Is the flow angle,

Silver slip coefficient,

Is the density,

Is the average flow cross section, c is the circumferential flow velocity,

Wing speed,

Silver radius,

Is the inspection volume and

Is the impeller efficiency, and subscripts 1 and 2 represent the inlet and outlet of the impeller 2, respectively.

)와 곡률반경(R_c) 그리고 임펠러(2) 폭(b)을 설계변수로 하며, 송풍기의 운전과 관련된 유량(Q)을 설계변수로 하였다. 이들 설계변수를 무차원화하였다. 그리하여 수치해석을 통해 다음과 같은 목적함수(f)를 구하여, 목적함수(f)의 값이 최소가 되는 최적 설계점을 구할 수 있도록 하였다. 즉,Accordingly, the position of the tongue 6 among the geometrical parameters for the impeller 2 and the scroll 4 (

), The curvature radius (R _c ) and the impeller (2) width (b) were design variables, and the flow rate (Q) related to the operation of the blower was the design variable. These design variables are dimensionless. Thus, through the numerical analysis, the following objective function (f) was obtained, and the optimal design point was obtained to minimize the value of the objective function (f). In other words,

)은Where efficiency (

)silver

는 정압이며, 하첨자 in과 ex가 각각 원심다익송풍기(1)의 입구와 출구를 나타내며, Q가 유량이며,

가 임펠러(2)의 각속도이다. 그리고 효율(

)의 분모는 송풍기 입력일률에 대한 것으로 임펠러 모델에 의해서 계산된다., Where

Is constant pressure, subscript in and ex represent inlet and outlet of the centrifugal blower 1, respectively, Q is the flow rate,

Is the angular velocity of the impeller (2). And efficiency (

The denominator of) is the blower input power and is calculated by the impeller model.

The reaction model constructed using the objective function and design variables is as follows. In other words,

₀,

₁ 의 수는 (n+1)(n+2)/2이다. 상기의 계수는 실험 데이터로부터 최소자승법(least square method)에 의해 결정되며, 구성된 반응모델에서 최적점을 찾아서 최적설계변수의 값을 구하도록 하였다.Where x _i , i and j are design variables, and the coefficients of the polynomial

₀ ,

The number of ₁ is (n + 1) (n + 2) / 2. The above coefficients were determined by the least square method from the experimental data, and the optimum point was found from the constructed response model to find the value of the optimal design variable.

)이 7.00도 내지 8.00도 바람직하게는 7.86도, 스크롤(4)과 임펠러(2) 설치(6) 부위(

)가 79.5도 내지 81.5도 바람직하게는 80.9도 그리고 스크롤(4)과 임펠러(2) 설부(6)반경(R_c)이 13.0mm 내지 14.0mm 바람직하게는 13.4mm로 하여 본 발명 원심다익송풍기(1)를 구성한 것이다.The elements of the centrifugal blower 1 thus detected are shown in FIGS. 6 and 7, and the impeller 2 has an impeller inner diameter d1 of 200 mm to 300 mm, preferably 266 mm, and an impeller 2 outer diameter d2. The 300mm to 320mm preferably 310mm, the impeller 2 width (b / d1) is 0.600mm to 0.630mm preferably 0.615mm, the number of impeller 2 (z) is 45 to 50, preferably 48 , Scroll (4) is the scroll zoom angle (

) Is 7.00 to 8.00 degrees, preferably 7.86 degrees, the scroll (4) and the impeller (2) installation (6)

79.5 degrees to 81.5 degrees, preferably 80.9 degrees, and the scroll 4 and the impeller 2, the tongue 6, the radius R _c is 13.0 mm to 14.0 mm, preferably 13.4 mm. (1) is configured.

는 기하학적으로 닮고 크기가 다른 유체기계 내의 흐름이 유체역학적으로 닮은꼴이 되도록 하여 유도해 낸 수치로 무차원 비속도는 유량과 압력에 대한 관계식으로,At this time, the dimensionless specific velocity corresponding to the range of the flow coefficient shown in FIG.

Is a numerical value derived from the geometrically similar and differently sized flows within a fluid machine that is hydrodynamically similar. The dimensionless specific velocity is a relationship between flow and pressure.

가 0.807이고, 도 9는 기준형상과 최적화된 형상의 설계변수의 값을 비교한 것이다. 즉 최적화 결과를 보면 효율이 27.7%인 기준 형상에 38.8%로 최적형상에서 성공적으로 향상되었음을 알 수 있으며, 최대 효율점에서의 정압은 최적화에 의해 미세하게 증가함을 알 수 있다.Is displayed. Where n is rotational speed (rpm), Q is flow rate and H is full head. In the present invention, the specific velocity ranges from 0.19 to 0.20, which does not change much within 1.15 to 1.65, which is the range of flow rates chosen for the experiment. And Figure 8 shows the regression analysis results of the response surface configured

Is 0.807, and FIG. 9 compares values of design variables of the reference shape and the optimized shape. In other words, the optimization result shows that the efficiency was improved to 38.8% in the reference shape with the efficiency of 27.7% in the optimum shape, and the static pressure at the maximum efficiency point is finely increased by the optimization.

=1.38)해서 얻은 형상의 성능 곡선도 함께 나타내었다. 여기서

는 기준 형상에 대한 효율 곡선을,

는 유량을 고정시킨 상태에서의 수 치최적설계의 결과로부터 얻어진 효율 곡선을 그리고

는 유량을 변화시킨 상태에서의 수치최적설계의 결과로부터 얻어진 효율 곡선을 의미한다. 유량을 변수로 사용한 경우 유량을 고정시켰을 경우에 비해 최대 효율이 증가함을 확인할 수 있다. 이것을 통해 설계변수에 의해 유량에 대한 최적 형상뿐만 아니라 최적화된 설계유량을 성공적으로 구할 수 있다. 그리고 도 12 및 도 13에 기준 형상에 대한 효율 및 성능곡선을 실험결과와 비교하여 나타내었다. 이에 따라 설계변수에 의해 유량에 대한 최적 형상뿐만 아니라 최적화된 설계유량을 구할 수 있다.FIG. 10 shows a design flow coefficient, that is, a flow coefficient representing the highest efficiency, and it can be seen that it varies from 1.2 to 1.479. The efficiency curves of the reference blower and the optimized blower are shown in FIG. It is. In addition, in order to verify the validity of the present invention using the flow rate as a design variable,

The performance curve of the shape obtained by = 1.38) is also shown. here

Is the efficiency curve for the reference shape,

Is the efficiency curve obtained from the result of the numerical optimum design with the flow fixed.

Means the efficiency curve obtained from the result of the numerical optimization design with the flow rate changed. When the flow rate is used as a variable, it can be seen that the maximum efficiency increases compared to the case where the flow rate is fixed. In this way, the optimum design flowrate as well as the optimum design flowrate can be successfully determined by design variables. 12 and 13 show the efficiency and performance curves for the reference shape in comparison with the experimental results. Accordingly, the optimized design flow rate as well as the optimum shape for the flow rate can be obtained by design variables.

The present invention provided as described above is to perform the three-dimensional flow analysis passing through the inside of the centrifugal blower to examine the effect on the performance in the range of change of the design variables of the impeller and scroll and to optimize the design based on the three-dimensional flow analysis will be. By constructing a centrifugal blower designed by such an optimization technique, an optimized centrifugal blower is constructed based on a more precise flow analysis technique to provide a centrifugal blower having superior performance and efficiency.

Claims (6)

In a centrifugal blower comprising an impeller 2, a blade 3 and a scroll 4, A design target setup step 100 including a design variable selection step S101, an objective function construction step S102, and a constraint condition setting step S103; Design target analysis step (S200) comprising a grid generation step (S201), three-dimensional heat flow analysis step (S202) and result data analysis step (S203) and Analysis result verification step (S300) and A regression analysis step (S400) including a response model coefficient determination step (S401) and a response model construction step (S402); Reaction model verification step (S500) and The element detection method of the centrifugal blower comprising an optimum design step (S600) comprising an optimum point determination step (S601) and an optimum design variable determination step (S602) of the reaction function. The method of claim 1, The objective function configuration step (S102) is Ps is the constant pressure, subscript in and ex represent the inlet and outlet of the blower, respectively, Q is the flow rate,

Is the angular velocity of the impeller,

this

when,

It is a step comprised by the objective function which is the element detection method of the centrifugal multipurpose blower characterized by the above-mentioned. The method of claim 1, The reaction model construction step (S402) is when x _i is a design variable, i and j is the number of design variables,

The element detection method of the centrifugal blower comprising the step of the reaction model formed by. In a centrifugal blower comprising an impeller 2, a blade 3 and a scroll 4, A centrifugal blower manufactured by the urea detection method of the centrifugal blower according to any one of claims 1 to 3. The method of claim 4, wherein The element detected by the impeller inner diameter of 200mm to 300mm, impeller outer diameter of 300mm to 320mm, impeller width of 0.600mm to 0.630mm, impeller number of 45 to 50 is provided by the element detection method of the centrifugal blower Centrifugal blower. The method according to claim 4 or 5, Detecting the element of the centrifugal blower equipped with the scroll magnification angle of 7.00 degrees to 8.00 degrees, the scroll and impeller installation portion of 79.5 degrees to 81.5 degrees, and the scroll and impeller tongue radius of 13.0 mm to 14.0 mm. Centrifugal blower configured by the method.

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