HVAC UNIT WITH HOT GAS REHEAT

摘要

The present disclosure is directed to a single compressor HVAC system with hot gas reheat. The system includes a single compressor, a pair of condensers, a reheat heat exchanger, an evaporator, and an expansion device. Within the system, the refrigerant exiting the compressor is separated into two portions. In the cooling mode, the first and second portions of the refrigerant are directed from the compressor through the two condensers in parallel. In the reheat mode, the first portion of the refrigerant is directed through the first condenser, while the second portion of the refrigerant is directed through the reheat heat exchanger. The system also may include a head pressure control device that is designed to maintain the compressor discharge pressure within a desired range by adjusting the condenser fan speed.

主权项

1. A system, comprising:
a compressor configured to circulate a refrigerant through a refrigerant circuit; a first condenser disposed along the refrigerant circuit, wherein the system is configured to direct a first portion of the refrigerant to the first condenser in a first operating mode of the system and in a second operating mode of the system; a second condenser disposed along the refrigerant circuit, wherein the system is configured to direct a second portion of the refrigerant to the second condenser in the first operating mode, wherein the first condenser and the second condenser are arranged in parallel with respect to a flow of the refrigerant in the first operating mode, and wherein the system is configured to direct the second portion of the refrigerant to bypass the second condenser in the second operating mode; a reheat heat exchanger disposed along the refrigerant circuit, wherein the system is configured to provide the second portion of the refrigerant to the reheat heat exchanger during the second mode of system operation, wherein the reheat heat exchanger is configured to transfer heat from the second portion of the refrigerant to a conditioned space, wherein the first condenser and the reheat heat exchanger are arranged in parallel with respect to the flow of the refrigerant in the second operating mode, and wherein the system is configured to direct the second portion of the refrigerant to bypass the reheat heat exchanger in the first operating mode; a temperature sensor configured to measure a temperature of the conditioned space; a humidity sensor configured to measure a humidity of the conditioned space; and a controller configured to receive feedback from the temperature sensor, the humidity sensor, or both, wherein the controller is configured to switch between the first operating mode and the second operating mode based on the feedback.