HVAC unit with hot gas reheat
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
86 Citations
20 Claims
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1. A system, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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circulating a refrigerant within a first refrigerant circuit through a compressor, from the compressor to a first condenser and a second condenser in parallel, from the first condenser and the second condenser to an expansion device, and from the expansion device to an evaporator in a first operating mode; circulating the refrigerant within a second refrigerant circuit through the compressor, from the compressor to the first condenser and a reheat heat exchanger in parallel, from the first condenser and the reheat heat exchanger to the expansion device, and from the expansion device to the evaporator in a second operating mode; detecting a temperature of a conditioned space using a temperature sensor; detecting a humidity of the conditioned space using a humidity sensor; and selectively switching between the first operating mode and the second operating mode based at least on the temperature and the humidity of the conditioned space. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. One or more tangible, non-transitory machine-readable media comprising processor-executable instructions to:
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receive one or more inputs indicative of a temperature of a conditioned space, a humidity of the conditioned space, or both; and send a signal to a three-way valve of a refrigerant circuit to switch between a first position and a second position based at least on the inputs; and wherein the first position corresponds to a first operating mode of the refrigerant circuit, wherein a refrigerant of the refrigerant circuit is configured to circulate through a compressor, from the compressor to a first condenser and a second condenser in parallel, from the first condenser and the second condenser to an expansion device, and from the expansion device to an evaporator in the first operating mode of the refrigerant circuit, and wherein the second position corresponds to a second operating mode of the refrigerant circuit, and wherein the refrigerant is configured to circulate through the compressor, from the compressor to the first condenser and a reheat heat exchanger in parallel instead of to the first condenser and the second condenser in parallel, from the first condenser and the reheat heat exchanger to the expansion device, and from the expansion device to the evaporator in the second operating mode of the refrigerant circuit. - View Dependent Claims (18, 19, 20)
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Specification