Range hood, and method and system for adjusting constant air volume of range hood

A technology of constant air volume and adjustment method, applied in the direction of oil fume removal, heating mode, household heating, etc., can solve the problem of self-adaptive adjustment of output constant air volume, etc., and achieve the effect of ensuring effect and constant output air volume

Active Publication Date: 2014-06-04
GUANGDONG WELLING ELECTRIC MACHINE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Based on this, it is necessary to provide a constant air volume adjustment method for range hoods to solve the problem that the output constant air volume cannot be adaptively adjusted according to the actual wind pressure range

Method used

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  • Range hood, and method and system for adjusting constant air volume of range hood
  • Range hood, and method and system for adjusting constant air volume of range hood
  • Range hood, and method and system for adjusting constant air volume of range hood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: only adopt the operating current I in the operating parameters of the motor to establish the air volume model:

[0028] Real-time air volume Q=C0×I+C1×I 2 +C2×I 3 ;

[0029] In the above formula, I is the operating current of the motor (that is, the bus current), and the preset parameters C0, C1, and C2 can be obtained by fitting the air volume and operating current I under different static pressures.

Embodiment 2

[0030] Embodiment 2: Using the motor running speed n and running current I to establish an air volume model:

[0031] Real-time air volume Q=C0×I+C1×n×I;

[0032] Or Q=C0×n+C1×I 2 +C2×I 2 ×n 2 +C3×n 3 ;

[0033] In the above formula, I is the operating current of the motor, n is the operating speed of the motor, and the preset parameters C0, C1, C2, and C3 can be obtained by fitting the air volume and operating parameter data under different static pressures.

Embodiment 3

[0034] Embodiment 3: Only the operating speed n, operating voltage u among the operating parameters of the motor and the winding resistance R, winding inductance L, winding pole pair number p, and back EMF coefficient ke of the motor body parameters are used to establish the air volume model.

[0035] by the formula: u 2 =(k e ×n+ωL d i d ) 2 +(ωL q i q ) 2 ;

[0036] ω=2πpn / 60;

[0037] Among them, among the commonly used surface mount motors: L q = L; L q is the q-axis inductance; L d is the d-axis inductance; i d is the d-axis current; i q is the q-axis current; ω is the angular velocity of the motor.

[0038] In vector control i d =0 control mode can get:

[0039] I=(i 2 d + i 2 q ) 1 / 2 = i q ;

[0040] u 2 =(k e ×n) 2 +(ωL q i q ) 2 ;

[0041] I=g(u,n,L,R)=(u 2 -(k e ×n) 2 ) / (ωL)=(u 2 -(k e ×n) 2 ) / (2πpnL / 60);

[0042] The air volume model formula can be obtained:

[0043] Q=f(u,n,L,R)=C0×g 2 (u,n,L,R)+C1×g 3 (u,n,L,R);

[0044] The...

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Abstract

The invention provides a method and a system for adjusting constant air volume of a range hood. The system comprises a detection unit for detecting the parameters of a motor in the range hood, an air volume monitoring unit for obtaining the real-time air volume of the exhaust outlet of the range hood according to the parameters of the motor, and a control unit for regulating the parameters of the motor through an inverter so as to keep the real-time air volume constant. The parameters of the motor are obtained and the current air volume value is calculated, and then the monitored real-time air volume is fed back to the control unit so that the control unit is capable of regulating the rotating speed or the current of the motor according to the real-time air volume, and therefore, the purpose of regulating the real-time air volume is achieved and the output air volume is kept constant, and moreover, the oil fume suction effect is guaranteed.

Description

technical field [0001] The invention belongs to the field of home appliances, and in particular relates to a range hood and its constant air volume adjustment method and system. Background technique [0002] At present, with the difference of people's living environment, kitchen exhaust pipes are diversified. There is a rural style of open smoke exhaust, and most of the middle and high-rise building users in the community use public flues to exhaust smoke. Among the household users in middle and high-rise buildings, when the low-level users exhaust air to the public flue, the high-rise users are subject to relatively large wind pressure, which makes the effect of high-level oil fume exhaust worse. And when the high-level air is exhausted, the low-level users need a lower speed to exhaust the oil fume normally, and the energy consumption is small. Traditional range hoods cannot be automatically adjusted according to the needs of users on different floors. [0003] In diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24C15/20
Inventor 柯文静金万兵
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG
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