Air conditioning unit anti-condensation cooling distribution system

Abstract

An anti-condensation cooling distribution system for an air conditioning unit includes: a plate heat exchanger having a primary side inlet, a primary side outlet, a secondary side outlet, and a secondary side inlet; a pump; a heat source end having an air-cooled coil; a piping assembly forming a primary side flow path and a secondary side flow path, wherein a first section of the primary side flow path connects a liquid inlet port to the primary side inlet, and a second section of the primary side flow path connects the primary side outlet to a liquid outlet port; the secondary side flow path connects the secondary side outlet, the pump, the air-cooled coil, and the secondary side inlet; and a control valve disposed in the primary side flow path for regulating the liquid flow rate in the primary side flow path to control the liquid temperature circulating in the secondary side flow path to be higher than a dew point temperature.

Claims

1. An anti-condensation cooling distribution system for an air conditioning unit, comprising: a plate heat exchanger having a primary side inlet, a primary side outlet, a secondary side outlet, and a secondary side inlet; a pump; a heat source end having an air-cooled coil; a piping assembly forming a primary side flow path and a secondary side flow path, a first section of the primary side flow path connecting a liquid inlet port and the primary side inlet, and a second section of the primary side flow path connecting the primary side outlet and a liquid outlet port; the secondary side flow path connecting the secondary side outlet, the pump, the air-cooled coil, and the secondary side inlet, adapted to be driven by the pump to circulate liquid within the secondary side flow path; and a control valve disposed in the primary side flow path for adjusting the liquid flow rate in the primary side flow path to control the temperature of the liquid circulating in the secondary side flow path to be higher than a dew point temperature.

2. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 1 further includes a control module. The control module has a controller and a temperature and humidity sensor. The temperature and humidity sensor is adapted to detect the ambient temperature and humidity at the heat source end. The controller is electrically connected to the temperature and humidity sensor and the control valve to calculate the dew point temperature based on the measurement signal of the temperature and humidity sensor, and to control the opening of the control valve accordingly, so that the temperature of the liquid circulating in the secondary side flow path is dynamically maintained above the dew point temperature.

3. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 2, wherein, The controller maintains the temperature of the liquid flowing between the plate heat exchanger and the air-cooled coil at 1-3°C above the dew point temperature.

4. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 2, wherein, The control module also includes several temperature sensors, one of which is located in the secondary flow path and between the pump and the heat source end to monitor the temperature of the liquid before it enters the heat source end. The controller is electrically connected to the temperature sensor and controls the control valve based on the comparison result of the measurement signal of the temperature sensor and the calculated dew point temperature.

5. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 4, wherein, When the comparison results show that the temperature of the liquid flowing in the secondary side flow path is lower than or close to the dew point temperature, the controller controls the control valve to reduce the liquid flow rate through the primary side flow path and / or increase the operating frequency of the pump, so that the temperature of the liquid flowing in the secondary side flow path rises back to above the dew point temperature.

6. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 1, wherein, The heat source end includes a fan wall located on one side of the air-cooled coil, which is adapted to guide airflow through the air-cooled coil for heat exchange.

7. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 1, wherein, The control valve is located in the second section of the primary flow path.

8. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 1, wherein, The pumps are multiple and connected in parallel, with at least one pump serving as a backup during operation.

9. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 8, wherein, Each pump is equipped with a valve on both its inlet and outlet sides for pipeline isolation during maintenance or operation switching.

10. The anti-condensation cooling distribution system for the air conditioning unit as described in claim 1, wherein, The liquid temperature received by the liquid inlet is 7-15°C, and the liquid temperature supplied to the heat source by the secondary flow path is 20-35°C.

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