Air control method for air handler unit

Abstract

The present disclosure relates to the field of air conditioning technology. In particular, it involves an air control method for air handler unit.

Claims

1. A dual flow air control system, comprising an ECM motor, an indoor unit wiring board, and a thermostat, wherein the ECM motor passes through the indoor unit wiring board, is connected to the thermostat; and the indoor unit wiring board includes a control power interface, dehumidification control signal G2 interface, fan control signal G interface, auxiliary heat source control signal W interface and common terminal C interface; and a thermostat common terminal signal C is connected to a common end of the ECM motor through the common terminal C interface; and an auxiliary heat source control signal W is connected to one gear of the ECM motor; and a fan control signal G is connected to one gear of the ECM motor; and a dehumidification control signal G2 is connected to one gear lower than the fan control signal G of the ECM motor; and the thermostat is configured to the output dehumidification control signal G2 when an indoor real-time temperature T is at T0+ΔT or less, where ΔT is a temperature threshold and T0 is an indoor cooling target temperature during cooling; and the thermostat is configured to the output fan control signal G when the indoor real-time temperature T is greater than T0+ΔT.

2. A dual flow air control method for an ECM motor, comprising: generating a dehumidification control signal G2; generating a fan control signal G; generating an auxiliary heat source control signal W; and wherein the auxiliary heat source control signal W is sent to one gear of the ECM motor; and the fan control signal G is sent to one gear of the ECM motor; and the dehumidification control signal G2 is sent to one gear lower than the fan control signal G of the ECM motor; and sending the dehumidification control signal G2 when an indoor real-time temperature T is at T0+ΔT or less, where ΔT is a temperature threshold and T0 is an indoor cooling target temperature during cooling; and sending the fan control signal G when the indoor real-time temperature T is greater than T0+ΔT.

3. A non-transitory computer-readable medium having stored thereon the set of computer-executable instructions for causing a first device for ECM motor to perform the steps comprising: generating a dehumidification control signal G2; generating a fan control signal G; generating an auxiliary heat source control signal W; and wherein the auxiliary heat source control signal W is sent to one gear of the ECM motor; and the fan control signal G is sent to one gear of the ECM motor; and the dehumidification control signal G2 is sent to one gear lower than G of the ECM motor; and sending the dehumidification control signal G2 when an indoor real-time temperature T is at T0+ΔT or less, where ΔT is temperature threshold and T0 is an indoor cooling target temperature during cooling; and sending the fan control signal G when the indoor real-time temperature T is greater than T0+ΔT.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows an existed ECM motor and thermostat connection system diagram.

(2) FIG. 2 shows a system diagram of the ECM motor and thermostat connection according to the first embodiment of this disclosure.

(3) FIG. 3 shows a relationship plot diagram between temperature curve and control signal logic according to the first embodiment of this disclosure.

DETAILED DESCRIPTION OF THE DISCLOSURE

First Embodiment

(4) FIG. 2 is a schematic view showing the connection structure of the ECM motor 1 and the thermostat of the present embodiment. As shown in FIG. 2, the ECM motor 1 in this embodiment is connected to the thermostat 3 through the indoor unit wiring board 2, and the indoor unit wiring board 2 includes a DIP switch 4, 24V power supply R interface 5, and a dehumidification control signal. G2 interface 6, fan control signal G interface 7, auxiliary heat source control signal W interface 8 and common terminal C interface 9. The thermostat common terminal signal C is connected to the common end of the ECM motor through the common terminal C interface 9.

(5) The auxiliary heat source control signal W is connected to the second gear of the ECM motor through the auxiliary heat source control signal W interface 8. The fan control signal G is connected to the fifth gear of the ECM motor through the fan control signal G interface 7 and the dial switch 4. The dehumidification control signal G2 is connected to the first gear of the ECM motor through the dehumidification control signal G2 interface 6. The 24V power supply of the thermostat 3 is connected to the 24V power supply R interface 5.

(6) The air processing unit of the present embodiment sets the temperature threshold ΔT and the indoor cooling target temperature T0 during cooling, and when the indoor real-time temperature T is above T0+ΔT, the thermostat 3 outputs the fan control signal G without output the dehumidification control signal G2 is applied. Conversely, when the indoor real-time temperature T is at T0+ΔT or less, the thermostat 3 does not output the fan control signal G, but outputs the dehumidification control signal G2.

(7) Alternatively, the thermostat 3 can be configured to run continuously when cooling for outputting the dehumidification control signal G2. When the indoor real-time temperature T is above T0+ΔT, the thermostat 3 changes to output the fan control signal G. When the indoor real-time temperature T is at T0+ΔT or less, the thermostat 3 reverts to outputting the dehumidification control signal G2.

(8) The ΔT is set to 3° F., and the value of the threshold ΔT cannot be too large, to avoid switching from the cooling mode to the dehumidification mode prematurely, and to avoid slowing down the cooling and affecting the cooling performance. But if the threshold setting is too small, the dehumidification running time is too short and it will negatively affect dehumidification. Therefore, 3° F. is an all-around value as considered above.