A ventilation system with automatic flow balancing derived from a neural network to consistently achieve a desired flow rate for inlet flow and/or outlet flow in various operating environments to optimize system performance. The system includes a ventilation device that includes an exhaust blower assembly with a blower motor and a control circuit having a mathematical equation that determines an estimated exhaust blower flow based upon select inputs. The ventilation device also includes a supply blower assembly with a blower motor and control circuit having a mathematical equation that determines an estimated supply blower flow based upon select inputs. When the estimated exhaust blower flow is different than an exhaust flow set point, the exhaust control circuit selectively alters power supplied to the exhaust motor. When the estimated supply blower flow is different than a supply flow set point, the supply control circuit selectively alters power supplied to the supply motor.

Systems and methods for providing dehumidification to an enclosed space can include a dehumidification unit in a supply air plenum that receives return air and a regeneration unit in a scavenger air plenum that receives outdoor air. The system can operate in a wet mode and a dry mode, depending on outdoor air conditions and a relative humidity setpoint for the enclosed space. The dehumidification unit and regeneration unit are both operational in the wet mode to dehumidify the return air and regenerate dilute desiccant. In the dry mode, the dehumidification unit and regeneration unit are not needed, and dry outdoor air can be supplied to the enclosed space. A heat recovery system utilizes waste heat from either return air or scavenger air, depending on the operating mode, to heat the outdoor air before it is supplied to the enclosed space or before it is used for regenerating desiccant.

A heating, ventilation, and air conditioning (HVAC) system includes a heat pump having a housing. The HVAC system also includes an energy recovery ventilator (ERV) or heat recover ventilator (HRV) integrated with the heat pump such that an access panel to the ERV or HRV faces outwardly from the housing of the heat pump, and such that the access panel is accessible at an outer boundary of the housing.

A heat exchange ventilator includes: a partition wall that has a bypass opening allowing an exhaust air duct upstream of a total heat exchanger to communicate with the exhaust air duct between the total heat exchanger and a humidifier, and separates the exhaust air duct upstream of the total heat exchanger and a supply air duct downstream of the total heat exchanger; a bypass damper that opens and closes the bypass opening; and a controller that performs control to open the bypass opening by the bypass damper at a first time, and close the bypass opening by the bypass damper at a second time.

A smart ventilation system which performs the ventilation of indoors, increases the air quality in closed spaces and maintains air quality, which is positioned over a window and includes: a ventilation module on a main body, which is attached to the window so as to control the air passage between indoors and outdoors; indoor and outdoor sensor groups which measure the air values indoors and outdoors, respectively; and an electronic card which analyzes the sensor values and engages one or more of an air intake fan group, an air outlet fan group, a dehumidifier, and a humidifier as a result of the analysis. A device provides the necessary energy from the adaptor and water reservoir.

An energy exchanger is provided. The exchanger includes a housing having a front and a back. A plurality of panels forming desiccant channels extend from the front to the back of the housing. Air channels are formed between adjacent panels. The air channels are configured to direct an air stream in a direction from the front of the housing to the back of the housing. A desiccant inlet is provided in flow communication with the desiccant channels. A desiccant outlet is provided in flow communication with the desiccant channels. The desiccant channels are configured to channel desiccant from the desiccant inlet to the desiccant outlet in at least one of a counter-flow or cross-flow direction with respect to the direction of the air stream.

A fresh air dehumidification device of a PTAC includes a cross-flow fan, a main evaporator, an air supply channel communicated with the cross-flow fan via the main evaporator, and an air exhausting device formed in the air supply channel for supplying air to the main evaporator. The air inlet of the air supply channel is connected to outdoor and the air outlet of the air supply channel is formed on a first air intake of the main evaporator. Fresh air passing through the air supply channel and the air exhausting device and is dehumidified by the main evaporator and then flows into the indoor so that the main evaporator of a PTAC is used as a dehumidifier in the dehumidification process, but without needing to increase a separate dehumidification system. So, the structure of the present disclosure can reduce the manufacturing cost of the PTAC.

A transition module for an energy recovery ventilator unit. The module comprises a frame having two opposing major surfaces with two separate through-hole openings therein. The module also comprises a self-sealing surface on one of the major surfaces and surrounding the two through-hole openings. One of the through-hole openings is configured to separately overlap with return air openings or supply air openings located in a first target side of one an energy recovery ventilator unit or an air handling unit and in a second target side of the other one of the energy recovery ventilator unit or the air handling unit. The other of the through-hole openings is configured to separately overlap with the other of the return air openings or the supply air openings located in the first and second sides.

A combined heating, ventilation, air conditioning, and refrigeration (HVACR) system including an HVAC sub-system and a refrigeration sub-system. The HVAC sub-system is in communication with an open space of an indoor environment and includes a first condenser, a first evaporator, and a first compressor at least partially defining a first refrigerant circuit circulating a first refrigerant for selectively conditioning an airflow within the HVAC sub-system that conditions the open space. The refrigeration sub-system is in communication with an enclosed space within the indoor environment and includes a second condenser, a second evaporator, and a second compressor and at least partially defining a second refrigerant circuit circulating a second refrigerant for selectively conditioning the enclosed space. Heat from the second refrigerant is selectively transferred to the airflow within the second condenser to reheat the airflow prior to the airflow being discharged into the open space.

A system for purifying and pre-conditioning intake air in an air conditioning unit comprises an energy exchange unit having an air inlet, an air outlet, a primary air flow running from the air inlet to the air outlet, and an active energy exchanging element or elements, and at least one spray washer having at least one nozzle, the spray washer positioned between the air inlet and the next active element, wherein the at least one spray washer is configured to dispense droplets of a fluid into the intake air from the at least one nozzle. A method for purifying and pre-conditioning intake air in an air conditioning unit is also described.