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Free static pressure air pipe type air conditioner

A duct machine and static pressure technology, applied in space heating and ventilation, heating and ventilation control systems, heating and ventilation safety systems, etc., can solve problems such as high energy efficiency, user complaints, and insufficient indoor unit capacity

Active Publication Date: 2013-12-04
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The other is the use of DC motors, which have higher energy efficiency than AC motors, but the target speed is fixed in EEPROM, and the speed is also fixed after leaving the factory.
In this way, just like the AC duct machine, the design requirements for the air supply duct are strict, and it can only be designed according to the rated static pressure of the indoor unit. Once the design static pressure is different from the actual static pressure, the output air volume of the indoor unit Deviations will occur, which will also cause the consequences of insufficient indoor unit capacity or high noise, resulting in user complaints

Method used

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  • Free static pressure air pipe type air conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The control method of the free static pressure blower of the present embodiment includes two processes of coarse adjustment and fine adjustment, and the control steps are as follows: coarse adjustment is performed first:

[0035] A: Set the constant air volume, maximum static pressure value, intermediate static pressure value, and minimum static pressure value of the DC fan motor;

[0036] B: power-on operation;

[0037] C: DC fan motor at fixed speed rpm Run, after running stably, measure the power of the DC fan motor P 实测 , according to the formula P 恒风量 =0.00041×rpm 2 +1.7912× rpm -618 to calculate this fixed speed rpm Under the power value, while according to the formula P 最小静压 =0.0000028*rpm 3 -0.0014* rpm 2 +0.61* rpm -50

[0038] P 中间静压 =0.0000061*rpm 3 -0.0059* rpm 2 -0.04* rpm +1020

[0039] P 最大静压 =0.0000203*rpm 3 -0.0484* rpm 2 +39.24* rpm -10595

[0040] Calculate this RPM rpm under constant air volume P 最...

Embodiment 2

[0059] The difference between this embodiment and Embodiment 1 is that the setting value A of this embodiment is set to 15, and the value of B is set to 4, and this embodiment does not have an additional fine-tuning method, and only the adjustment method of claim 1 is performed. Can.

Embodiment 3

[0061] The difference between this embodiment and Embodiment 1 is that the setting value A of this embodiment is set to 10, and the value of B is set to 10.

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Abstract

The invention relates to a central air conditioning system, in particular to an air pipe type air conditioner. According to the technical scheme, a direct current fan motor is adopted, a static pressure recognition mode can run before an indoor unit is used, automatic operation is started through a unit, resistance characteristics of an air duct are recognized through changing the revolving speed, and the revolving speed suitable for resistance is found. After the recognition is achieved, the air conditioner automatically stops, and the revolving speed is recorded; the revolving speed is taken as a target revolving speed during following running, air blast capacity of the unit is guaranteed to be constant, and the full output capacity is ensured; after the static pressure reorganization method is adopted, the air blast capacities of the air pipe type air conditioner under different static pressures are recognized on the condition of normal voltage, and the deviation of the output air capacity of the indoor unit is within + / -5%; the deviation of the output air capacity of the indoor unit is also within + / -10% on the condition of abnormal voltage.

Description

[0001] technical field [0002] The invention relates to a central air-conditioning system, in particular to an air duct machine. Background technique [0003] When the ducted indoor unit is installed on the project site, the installation environment is different, and there will be different static pressure requirements. The traditional air duct machine uses an AC asynchronous motor, and the model with a suitable static pressure must be selected according to the design of the air duct on the project site. Due to the lack of standardization of domestic engineering installations, it often occurs that high static pressure duct machines are connected to low static pressure pipes. At this time, the temperature rise of the motor will be too high, the air volume will be too large, and the noise will become louder, which will affect the comfort and reliability of the product. Moreover, the static pressure design of the air ducts on the project site is varied, and air-conditioning ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
CPCF24F11/00
Inventor 林文涛何成军刘方叶李虎
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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