Air duct indoor unit heat exchanger filth blockage detecting method
A technology of air duct indoor unit and detection method, which is applied in the direction of mechanical equipment, etc., and can solve the problems of different air duct resistance characteristics, etc.
Active Publication Date: 2020-02-04
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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Problems solved by technology
The air duct machine is closely related to the on-site installation. Due to the difference in the static pressure value of the air duct and the air outlet, the resistance characteristics of the air duct are also different. Simply detecting the change of the fan power at a certain speed cannot effectively infer the dirty blockage of the heat exchanger. Therefore, there is a need for an effective method for detecting the dirty blockage of the air duct indoor unit heat exchanger
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[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0019] The heat exchanger of the air duct indoor unit will be dirty and clogged to varying degrees over time. The dirty clogging of the heat exchanger will affect the cooling and heating effect, and the static pressure value of the air duct unit will increase with the increase of the clogging degree. The initial static pressure value of the pipe m...
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The invention relates to an air duct indoor unit heat exchanger filth blockage detecting method. The method comprises the following steps of S1, obtaining the initial rotating speed r0 and power P actual under the nominal air delivery; S2, calculating P1, P2 and K, wherein when the P actual is not smaller than k2*P2, it is considered that a heat exchanger is not in filth blockage; if the P actualis smaller than k1*P1, it is considered that the heat exchanger is in filth blockage; if the P actual is not smaller than k1*P1 and smaller than k2*P2, S3 is executed; S3, calculating P3 and delta P,wherein delta P =P actual-P3; S4, when the delta P is not smaller than A, updating r0 to be r0-r1', calculating P1, P2 and P actual, and executing S2 again, when the delta P is not larger than -A, updating r0 to be r0+r2', calculating P1, P2 and P actual, executing S3, and obtaining r0 when the absolute value of the delta P is smaller than A; calculating M, M0 and delta M, wherein delta M=M-M0; ifthe delta M is larger than M and M is larger than k3*M max or the delta M is larger than B and P0-P rate is larger than C, considering that the heat exchanger is in filth blockage. The method is usedfor effectively detecting the filth blockage condition of the air duct indoor heat exchanger.
Description
technical field [0001] The invention belongs to the technical field of air duct indoor units, and in particular relates to a method for detecting dirty blockage of a heat exchanger of an air duct indoor unit. Background technique [0002] The ducted air conditioner (referred to as the ducted unit) includes an outdoor unit and an indoor unit. It supplies air to the room through the air duct connected to the air conditioner. room, and then sent back to the indoor unit through the return air pipe, and finally cooled by the heat exchanger, mixed with fresh air and then sent out again. The heat exchanger of the indoor unit will become dirty after being used for a long time. When the dust accumulates to a certain extent, the heat exchange efficiency of the indoor heat exchanger will be low, the cooling and heating effect will be deteriorated, and the energy consumption will be increased, which will affect the user experience. [0003] When the air duct indoor unit is installed on...
Claims
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IPC IPC(8): F24F11/32F24F11/64F24F11/65
CPCF24F11/32F24F11/64F24F11/65
Inventor 孟建军孙超林文涛
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST