Abstract: An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

Abstract: A refrigeration cycle device, comprising: a compressor configured to compress a refrigerant; an outdoor air heat exchanger configured to exchange heat between the refrigerant and outside air located outside a target space; an indoor air heat exchanger configured to exchange heat between the refrigerant and inside air located inside the target space; a water heat exchanger configured to exchange heat between the refrigerant and water; a four-way valve located between an indoor port on the indoor air heat exchanger, an outdoor port on the outdoor air heat exchanger, an input port on the compressor, and an output port on the compressor; a bypass refrigerant line connecting the indoor port to the outdoor port; and a controllable valve located on the bypass refrigerant line, the controllable valve being configured to have an open state that passes the refrigerant and a closed state that prohibits passage of the refrigerant.

Abstract: A computer-implemented method is provided of controlling operation of an indoor fan in an air conditioning system, the method including: setting a fan speed of the indoor fan to a maximum value; storing a first low temperature as a low temperature threshold; measuring the indoor temperature in an indoor space as a current indoor temperature; subtracting a set point temperature from the current indoor temperature to determine a temperature difference; determining that the temperature difference is less than the low temperature threshold; and reducing the fan speed by a first adjustment interval, storing a second low temperature difference as the low temperature threshold, and storing a second high temperature as a high temperature threshold, all in response to the determining that the current temperature difference is less than the low temperature threshold.

Abstract: A coil assembly is provided, comprising: a direct expansion (DX) coil circulating refrigerant and cooling supply air passing over the DX coil by heat exchange to generate dehumidified air; a reheat coil circulating the refrigerant and heating the dehumidified air by heat exchange to generate output air; a first horizontal drain pan below the DX and reheat coils in a first horizontal position; a second horizontal drain pan below the DX and reheat coils in a second horizontal position; a first vertical drain pan below the DX and reheat coils in a vertical position, wherein the first and second horizontal drain pans are connected to the first vertical drain pan, the reheat coil is secured between the first and second horizontal drain pans, and the first horizontal drain pan is on an opposite side of the DX coil and the reheat coil from the second horizontal drain pan.

Abstract: A coil assembly is provided, comprising: a direct expansion (DX) coil circulating refrigerant and cooling supply air passing over the DX coil by heat exchange to generate dehumidified air; a reheat coil circulating the refrigerant and heating the dehumidified air by heat exchange to generate output air; a first horizontal drain pan below the DX and reheat coils in a first horizontal position; a second horizontal drain pan below the DX and reheat coils in a second horizontal position; a first vertical drain pan below the DX and reheat coils in a vertical position, wherein the first and second horizontal drain pans are connected to the first vertical drain pan, the reheat coil is secured between the first and second horizontal drain pans, and the first horizontal drain pan is on an opposite side of the DX coil and the reheat coil from the second horizontal drain pan.

Abstract: A computer-implemented method is provided of controlling operation of an indoor fan in an air conditioning system, the method comprising: setting a fan speed of the indoor fan to a maximum value; storing a first low temperature difference as a threshold; measuring the indoor temperature in an indoor space as a current indoor temperature; subtracting a set point temperature from the current indoor temperature to determine a temperature difference; determining that the temperature difference is less than the threshold; and reducing the fan speed by a first adjustment interval, storing a second low temperature difference as the low temperature difference threshold, and storing a second high temperature difference as a high temperature difference threshold, all in response to the determining that the current temperature difference is less than the threshold.

Abstract: An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

Abstract: A heat pump system is provided, comprising: a cooling and heating coil having first and second refrigerant ports; a reheat coil having third and fourth refrigerant ports; first and second refrigerant pipes connected to the first and second refrigerant ports, respectively; a first solenoid valve between the third refrigerant port and the second refrigerant pipe; a second solenoid valve between the fourth refrigerant port and the second refrigerant line; an expansion valve between the fourth refrigeration port and the second refrigerant port; a first check valve between the fourth refrigerant port and the expansion valve; a second check valve between the expansion valve and a condensing circuit; a third check valve between the first check valve and the expansion valve; a fan circuit for blowing air across the cooling and heating coil and the reheat coil in order; and a controller for controlling the heat pump system.

Abstract: An air handler, comprising: a heating and cooling coil to exchange heat with input air to generate conditioned air; an air diffuser to diffuse the conditioned air to generate diffused air; and an air blower to draw the input air into the air handler via an air inlet, pass the input air over the heating and cooling coil, pass the conditioned air through the diffuser, and expel the diffused air through an air outlet as output air, wherein the air diffuser contains one or more baffles to create two or more air passages that operate to control the expansion and reduction of kinetic energy of the conditioned air to generate the diffused air, a first direction represents a direction of a shortest line between the air blower and the outlet, the air diffuser passes air in a second direction displaced from the first direction by a deflection angle.

Abstract: An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

Abstract: An air handler, comprising: a heating and cooling coil to exchange heat with input air to generate conditioned air; an air diffuser to diffuse the conditioned air to generate diffused air; and an air blower to draw the input air into the air handler via an air inlet, pass the input air over the heating and cooling coil, pass the conditioned air through the diffuser, and expel the diffused air through an air outlet as output air, wherein the air diffuser contains one or more baffles to create two or more air passages that operate to control the expansion and reduction of kinetic energy of the conditioned air to generate the diffused air, a first direction represents a direction of a shortest line between the air blower and the outlet, the air diffuser passes air in a second direction displaced from the first direction by a deflection angle.

Abstract: An air-to-air heat recovery core, comprising: a core assembly having parallel first and second channels that are open to first and second sides of the core assembly, respectively, the first and second channels interleaved, and each first channel sharing a wall with an adjacent second channel; first and second sealants formed along opposite first and second edges, respectively, of the core assembly perpendicular to a running direction of the first and second channels, the first and second sealants respectively blocking first and second ends of the channels; and first and second panels secured to first and second sides of the core assembly, respectively, the first and second panels blocking a middle portion of the first and second channels, respectively, such that air can enter and leave the first and second channels via the first and second end portions of the first and second channels but not via the middle portions.

Abstract: An air handler blower is provided, comprising: a blower wheel having a center plate with one or more openings, a first cylindrical blade assembly extending from a first side of the center plate, the first cylindrical blade assembly containing a plurality of first blades extending from the first side of the center plate and arranged in a circle to define a first cavity, and a second cylindrical blade assembly extending from a second side of the center plate opposite the first side, the second cylindrical blade assembly containing a plurality of second blades extending from the second side of the center plate and arranged in a circle to define a second cavity; a motor located proximate to the first cylindrical blade assembly and configured to rotate the blower wheel; and an axle connecting the motor and the center plate.

Abstract: An air-conditioner, comprising: an indoor coil; an outdoor coil; a drain pan under the indoor and outdoor coils, the drain pan including a slinging trough having a slinging depth, a draining trough having a draining depth, a pumping trough having a pumping depth, and a drain hole formed in a bottom surface of the draining trough; a drain valve for selectively allowing liquid to pass through the drain hole; a drain pump for selectively pumping liquid out of the pumping trough; a fan for blowing air on the outdoor coil and moving the liquid from the slinging trough onto the outdoor coil when the fan is operating; and a controller for controlling operation of at least the drain pump and the fan, wherein the pumping depth is greater than the draining depth, the draining depth is greater than the slinging depth.

Abstract: An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

Abstract: An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.

Abstract: A refrigeration cycle device, comprising: a compressor configured to compress a refrigerant; an outdoor air heat exchanger configured to exchange heat between the refrigerant and outside air located outside a target space; an indoor air heat exchanger configured to exchange heat between the refrigerant and inside air located inside the target space; a water heat exchanger configured to exchange heat between the refrigerant and water; a four-way valve located between an indoor port on the indoor air heat exchanger, an outdoor port on the outdoor air heat exchanger, an input port on the compressor, and an output port on the compressor; a bypass refrigerant line connecting the indoor port to the outdoor port; and a controllable valve located on the bypass refrigerant line, the controllable valve being configured to have an open state that passes the refrigerant and a closed state that prohibits passage of the refrigerant.

Abstract: An air-conditioner unit, is provided comprising: an air-conditioning coil between an input vent and an output vent, receiving return air, passing the return air through the air-conditioning coil, and ejecting supply air, the air-conditioning coil including a plurality of coil paths passing refrigerant; a refrigerant regulator connected to the plurality of coil paths to regulate the flow of the refrigerant through the plurality of coil paths, wherein the refrigerant regulator is configured to have a least two selectable settings, the first selectable setting configuring the refrigerant regulator such that the refrigerant regulator stops refrigerant from flowing through a first subset of the plurality of coil paths and allows refrigerant to flow through a second subset of the plurality of coil paths, the second selectable setting of the refrigerant regulator configuring the refrigerant regulator such that the refrigerant regulator allows refrigerant to flow through all the plurality of coil paths.

Abstract: A refrigeration cycle device, comprising: a compressor configured to compress a refrigerant; an outdoor air heat exchanger configured to exchange heat between the refrigerant and outside air located outside a target space; an indoor air heat exchanger configured to exchange heat between the refrigerant and inside air located inside the target space; a water heat exchanger configured to exchange heat between the refrigerant and water; a four-way valve located between an indoor port on the indoor air heat exchanger, an outdoor port on the outdoor air heat exchanger, an input port on the compressor, and an output port on the compressor; a bypass refrigerant line connecting the indoor port to the outdoor port; and a controllable valve located on the bypass refrigerant line, the controllable valve being configured to have an open state that passes the refrigerant and a closed state that prohibits passage of the refrigerant.

Abstract: An air-conditioning unit is provided, comprising: an input vent for receiving return air; an intermediate vent; an output vent; a blower fan proximate to the input vent for moving the return air from the input vent to the intermediate vent; and an air-conditioner coil between the intermediate vent and the output vent including an active portion including one or more operational air-conditioning coils that receive a first portion of the return air from the intermediate vent, for circulating a coolant, condition the first portion of the return air by heat exchange with the coolant to create conditioned air, and pass the conditioned air to the output vent, and an inactive portion that does not circulate coolant and passes a second portion of the return air as unconditioned air to the output vent, wherein the conditioned air and the unconditioned air pass through the output vent as supply air.