Processing method for mildew prevention of inside machine not turned on in heating process of direct-current frequency-conversion multiple online air-conditioning system

Abstract

The invention discloses a processing method for mildew prevention of an inside machine not turned on in a heating process of a direct-current frequency-conversion multiple online air-conditioning system, specifically comprising the following steps of: (1) running an indoor fan which is not turned on in a low wind shift for 1-2min for pre-drying after a defrosting end mark or a system heating oil return end mark is detected for 3-5min by the inside machine which is not turned on when the system is in the heating process; and (2) re-running the indoor fan which is not turned on in a low wind shift for 1-2min after the defrosting end mark or the system heating oil return end mark is detected for 10-15min by the inside machine which is not turned on when the system is in the heating process. The invention has the advantages of effectively drying condensed water on the inside machine which is not turned on to prevent the inside machine from mildewing and producing peculiar smell so that the normal use of a controller and the health of users can be ensured.

Description

technical field [0001] The invention relates to the technical field of DC frequency conversion multi-connection air-conditioning systems, in particular to a treatment method for anti-mildew treatment of non-operating internal units of the DC frequency conversion multi-connection air-conditioning system. Background technique [0002] In the current DC inverter multi-split air-conditioning system, the internal units that are not turned on for heating are basically not treated for mildew prevention. However, since the air conditioning system needs to enter the defrosting operation and heating oil return operation during heating operation, the defrosting operation is basically with the four-way valve closed. In order to reduce the defrosting time, when entering the defrosting operation, the electronic expansion valve of the unopened internal unit will open to reduce the defrosting time. It is necessary for the heating oil return system, and the internal unit that is not open whe...

AI Technical Summary

Problems solved by technology

In order to reduce the defrosting time, when entering the defrosting operation, the electronic expansion valve of the unopened internal unit will open to reduce the defrosting time. It is necessary for the heating oil return system, and the internal unit that is not open when the heating system returns oil The electronic expansion valve of the machine must also be opened, so that the refrigerant Freon will flow through and the temperature of the inner coil is very low at this time, and the experiment shows that it can reach -30°C; therefore, for areas with slightly higher humidity, if the indoor temperature is higher than the coil The temperature of the pipe will produce condensed water, because the internal fan of the unopened indoor unit is not running, so when the defrosting is completed or the heating and oil return is completed, the condensed water left on the coil will evaporate, but it will flow to the Condensed water in other places such as sheet metal or on the air guide door cannot evaporate, and it will become moldy and produce peculiar smell after a long time

This is not conducive to the normal use of the controller, but also affects the user's health

Therefore, it is necessary to solve the moldy problem of the multi-connection mechanism heating and not turning on the internal unit