A home control system includes a thermostat configured to measure environmental conditions in a first room of a building and control heating, ventilation, and air condition (HVAC) equipment within the building. The thermostat includes a central control hub configured to communicate with a plurality of remote sensor units via a data communications interface. The thermostat further includes a processing circuit configured to monitor and control non-HVAC equipment within the building. The system further includes a first remote sensor unit of the plurality of remote sensor units. The first remote sensor unit is configured to measure environmental conditions in a second room of the building and wirelessly communicate information associated with the measured environmental conditions to the central control hub. The thermostat is further configured to control both the HVAC equipment and the non-HVAC equipment within the building based on the information received from the remote sensor unit.

To solve the problem that a resonance phenomenon occurs between an outdoor unit and a compressor of existing air conditioners, embodiments include a compressor and a pipeline connected to the compressor. A control method includes obtaining a vibration displacement of the pipeline during the operation of the air conditioner and recording it as a first vibration displacement; obtaining the vibration displacement of the pipeline again after time has elapsed and recording it as a second vibration displacement; and selectively adjusting operating parameters of the compressor according to the first vibration displacement and the second vibration displacement. The vibration condition of the outdoor unit is determined through the real-time vibration condition and the vibration change condition of the pipeline so the air conditioner can selectively change the operating parameters of the compressor according to the vibration condition. Thus the vibration condition of the compressor is changed to avoid pipeline damage.

The present application provides a wall-mounted air purifier, which includes a casing, a fan and a purification module; the casing is provided with an air inlet and an air outlet; the fan is located between the air inlet and the air outlet; and the purification module is arranged at an air flow path of the fan; the purification module comprises a bracket mounted in the casing and a filter inserted in the bracket, a front side surface of the casing is provided with a insertion hole configured for inserting the filter into the bracket, the insertion hole is located at a position corresponding to the filter, the wall-mounted air purifier further comprises a front cover covering at a front side of the casing, and the front cover is detachably connected to the casing.

A controller for HVAC equipment of a plant includes a processing circuit configured to predict an impact of a time delay of the plant on a performance variable received as feedback from the plant. The processing circuit is configured to artificially increase or decrease a value of the performance variable using an adjustable time delay parameter to at least partially negate the impact of the time delay on the performance variable. The processing circuit is configured to use the artificially increased or decreased value of the performance variable in on-off feedback control to operate the HVAC equipment.

Heating, ventilation, and air conditioning (HVAC) controllers are described herein. One method includes receiving an approximate relationship between each of a number of controlled and manipulated variables of an HVAC system, designating one of the number of controlled variables as a primary controlled variable, determining operating parameters for each of the number of manipulated variables that maintain the primary controlled variable based, at least in part, on the approximate relationship between the primary controlled variable and each respective manipulated variable, and determining operating parameters for each of the number of manipulated variables that maintain each of the other controlled variables based, at least in part, on the approximate relationship between each respective other controlled variable and each respective manipulated variable and the determined operating parameters for each of the number of manipulated variables that maintain the primary controlled variable.

In one aspect, a system for operations an energy plant obtains thermal energy load allocation data indicating time dependent thermal energy load of the energy plant. The system determines, for a time period, an operating state of the energy plant from a plurality of predefined operating states based on the thermal energy load allocation data. The system determines operating parameters of the energy plant according to the determined operating state. The system operates the energy plant according to the determined operating parameters.

In one embodiment, an HVAC system includes a first control unit communicatively coupled to a first plurality of HVAC units and a second control unit communicatively coupled to a second plurality of HVAC units. The first control unit may connect to the second control unit using a Wi-Fi direct protocol to create an HVAC control network. The first control unit and second control unit may each detect and connect to a Wi-Fi network comprising a wireless access point. The first and second control units may then communicate concurrently over both the HVAC control network and the Wi-Fi network. The first control unit may detect a user device over the Wi-Fi network, receive a first command from the user device over the Wi-Fi network, and communicate the first command to the second control unit over the Wi-Fi network. The first control unit may detect a communication failure in the Wi-Fi network, communicate with the user device over the HVAC network using the Wi-Fi direct protocol, receive a second command from the user device over the HVAC control network, and transmit the second command to the first plurality of HVAC units.

A space conditioning system and method for monitoring electrical parameters and/or thermodynamic parameters relating to the heat of extraction/rejection or power consumption of the system and to communicate the monitored parameters to an external device.

The air-conditioning system control apparatus includes an influence-degree calculation unit that calculates a degree of influence between two air-conditioning indoor units that are selected from a plurality of air-conditioning indoor units as a pair of air-conditioning indoor units, based on operation data on the pair of air-conditioning indoor units.

A monitoring system for a heating, ventilation, and air conditioning (HVAC) system of a building receives, from a monitoring device located at the building, a frequency domain representation and a time domain current value that are based on an aggregate current supplied to a plurality of components of an indoor air handler of the HVAC system. The monitoring system assesses, based on the received frequency domain representation and time domain current value, whether a first fault has occurred in a first component of the plurality of components of the indoor air handler and whether a second fault has occurred in a second component of the plurality of components of the indoor air handler. The monitoring system generates and transmits an alert in response to assessing occurrence of at least one of the first fault and the second fault. The monitoring system is located remotely from the building.