Abstract: A system, method, and air purification device. Air is taken in from an environment into the air purification system. The air is filtered with a primary filter. The filtered air is treated with vacuum ultraviolet radiation in a primary reaction chamber to generate irradiated air. The irradiated air is treated with ultraviolet-C radiation in a secondary reaction chamber to remove ozone and neutralize contaminants to generate purified air. The purified air is emitted back into the environment from the air purification system.

Abstract: A heat management system includes a high-temperature heat medium circuit, a low-temperature heat medium circuit, a circuit connection part, and a circuit switching part. The high-temperature heat medium circuit connects a heat medium and refrigerant heat exchanger and a heater core. The low-temperature heat medium circuit connects a radiator and a heat generation equipment. The circuit connection part connects the high-temperature heat medium circuit and the low-temperature heat medium circuit such that the heat medium can flow in and out. The heat management system is switched by the circuit switching part between an operation mode in which the heat medium heated by the heat medium and refrigerant heat exchanger is circulated through the heater core and an operation mode in which the heat medium heated by the heat generation equipment and the heat medium and refrigerant heat exchanger is circulated through the heater core.

Abstract: A heat-exchanger fixing plate fixes a side portion of a heat exchanger to a housing panel of an air-conditioning apparatus, the heat exchanger including a heat radiation fin and a heat transfer tube. The heat-exchanger fixing plate includes a heat-exchanger support portion facing the side portion of the heat exchanger, and having an insertion hole through which a hairpin portion of the heat transfer tube of the heat exchanger is inserted; and a housing-panel fixing portion separate from and fitted to the heat-exchanger support portion fastened with a screw to the housing panel such that the heat exchanger is fixed to the housing panel. The housing-panel fixing portion is made of material having a higher mechanical strength than that of the heat-exchanger support portion, and the heat-exchanger support portion is made of the material having a lower friction coefficient than that of the housing-panel fixing portion.

Abstract: This application relates to a humidifying device, including a shell, an air duct and an air blowing apparatus disposed in the shell, wherein a mist outlet channel, an atomizing cavity and a heating cavity communicated with the mist outlet channel are disposed in the shell; the air duct includes a first air duct communicated with the atomizing cavity and a second air duct communicated with the heating cavity; the air blowing apparatus is provided with an air outlet member, and the air outlet member is aligned with the first air duct and the second air duct, and is configured to supply a first air flow to the first air duct and supply a second air flow to the second air duct. When the humidifying device operates, the first air flow forms an atomized air flow and the second air flow forms a heated air flow then are mixed.

Abstract: The present disclosure provides a high-temperature negative-pressure air exchange sterilizer and a sterilization method thereof. An air inlet is disposed at a bottom of a waterproof shell of the sterilizer, and an inlet filter is installed at the air inlet. Air entering from the air inlet is divided into two paths at a check valve. One path is connected with a negative-pressure fan through a pipeline B, and the other path is communicated with an air outlet through a pipeline A. A plurality of heating rods and temperature sensors are disposed in the pipeline A. The pipeline A is zigzag disposed at an upper part of the waterproof shell, and a thermal insulation material is disposed outside a zigzag part. A butterfly valve and an outlet filter screen are sequentially disposed at the air outlet in an air exhaust direction. The problem that viruses exhaled by breathing of an infected person are mixed in aerosol, so that a person in close contact with the infected person is likely to be infected is solved.

Abstract: An exemplary thermal management system includes, among other things, a valve, a radiator loop configured to be connected to the valve, a power electronics loop configured to be connected to the valve, a heater loop configured to be connected to the valve, and a battery loop configured to be connected to the valve. The valve is configured to connect one or more of the radiator, power electronics, heater, and battery loops together and the valve is configured to isolate at least one of the radiator, power electronics, heater, and battery loops from any remaining loops of the radiator, power electronics, heater, and battery loops.

Abstract: This application provides an evaporative cooling unit. The evaporative cooling unit includes an outdoor channel, an indoor channel, and a heat exchange apparatus, and, further includes: an air filter and a defrosting apparatus that are disposed in the outdoor channel. The defrosting apparatus is located on a side that is of the air filter and that is close to an air intake vent of the outdoor channel. The defrosting apparatus includes a heat exchange film, and the heat exchange film has a first channel and a second channel that are arranged crosswise. The first channel communicates with the air intake vent of the outdoor channel, the second channel communicates with the indoor channel, and the first channel communicates with the second channel. The defrosting apparatus further includes a switch valve, and the switch valve is configured to control the second channel to communicate with the indoor channel.

Abstract: A terminal unit of a heating, ventilation, and/or air conditioning (HVAC) system includes a fan configured to provide an airflow through the HVAC unit by drawing the airflow into a fan inlet and expelling the airflow out of a fan outlet. The terminal unit also includes an inlet diffuser disposed upstream of the fan inlet relative to a direction of the airflow, wherein the inlet diffuser includes a first layer of perforated metal and a second layer of perforated metal disposed between the first layer of perforated metal and the fan inlet.

Abstract: A heat management system includes a high-temperature heat medium circuit, a low-temperature heat medium circuit, a circuit connection part, and a circuit switching part. The high-temperature heat medium circuit connects a heat medium and refrigerant heat exchanger and a heater core. The low-temperature heat medium circuit connects a radiator and a heat generation equipment. The circuit connection part connects the high-temperature heat medium circuit and the low-temperature heat medium circuit such that the heat medium can flow in and out. The heat management system is switched by the circuit switching part between an operation mode in which the heat medium heated by the heat medium and refrigerant heat exchanger is circulated through the heater core and an operation mode in which the heat medium heated by the heat generation equipment and the heat medium and refrigerant heat exchanger is circulated through the heater core.

Abstract: A system and kit for capturing a 3D image of a body a user includes a plurality of pillar segments being configurable between an assembled configuration and a disassembled configuration. In the assembled configuration, the pillar segments are joined to form one or more upstanding sensing pillars. A plurality of sensors operable to capture image data are distributed along the one or more sensing pillars. The plurality of sensors have fields of view that are overlapping when supported on the sensing pillars. In the disassembled configuration, transportation of the pillar segments is facilitated. The system and kit may be suitable for use at a remote location. Additional functionalities may include a power storage unit, solar charging panels, climate control subsystem, and wireless communication submodule. In operation, the sensing pillars may be enclosed within an enclosure.

Abstract: In one embodiment, an autonomous driving system to autonomously drive an autonomous driving vehicle (ADV) includes one or more processors, a perception module executed by the processors to perceive a driving environment surrounding the ADV, and a planning module executed by the processors to plan a path based on perception data of the driving environment to navigate through the driving environment. The processors are mounted on one or more cold plates coupled to a vehicle cooling system of the ADV, the vehicle cooling system having a first radiator and a first coolant distribution loop coupled to a vehicle engine of the ADV to provide liquid cooling to the vehicle engine. The cold plates are coupled to the first radiator via a second coolant distribution loop to receive a portion of the coolant from the first radiator to extract heat from the cold plates.

Abstract: An air purification system includes a conduit extending between an inlet and an outlet, each in fluid communication with an enclosed environment. Ambient air from the enclosed environment enters the conduit via the inlet and treated air exits the conduit and enters the enclosed environment via the outlet. The system further includes a fibrous filter disposed within the conduit and configured to treat the ambient air thereby generating the treated air, and a renewal unit disposed within the conduit and configured to renew the fibrous filter.

Abstract: A gas furnace includes: a burner in which a mixture of air and fuel gas burns; a heat exchanger through which a combustion gas produced by the combustion of the mixture flows; a duct including a room air duct through which air coming from a room passes and a supply air duct through which air supplied to the room passes; a blower that induces a flow of the room air supplied as the supply air to the room through the heat exchanger; and a humidification and dehumidification device with no water supply installed on one side of the supply air duct. The amount of moisture contained in the supply air is adjusted by an adsorbent coated on the surface of the humidification and dehumidification device with no water supply.

Abstract: A method for controlling heating of a hybrid vehicle is provided. The vehicle includes a duct flowing air into the indoor of the hybrid vehicle from the outside, a heater core for circulating the coolant heated from an engine inside the duct, a PTC heater heated by the power supplied from a high-voltage battery of the hybrid vehicle inside the duct, and a controller. The controller operates the engine and the PTC heater and heats the air flowing into the indoor of the hybrid vehicle through the duct. The voltage supplied to the PTC heater from a low voltage DC-DC converter (LDC) is changed based on the state of the engine and an auxiliary battery for supplying power to an electric component of the vehicle to apply power to the PTC heater.

Abstract: Systems and methods for air flow circulation are described which utilize one or more air conditioning units as well as transfer grilles to move cooler air from one space to another. The transfer grilles can include bi-directional in-line fans to move air between spaces in discrete ducts located between the spaces. Motorized dampers can be controlled by a controller that receives information about various rooms and areas from temperature and occupancy sensors within those rooms or areas. In this manner, conditioned air can be directed to those rooms that are occupied and whose temperature needs correction based on a thermostat setting, and use of the air conditioning unit can be avoided when a cool air source is present in another space.

Abstract: A system and method to evaluate building cooling fuel consumption with the aid of a digital computer is described. The evaluation can be used for quantifying personalized electric and fuel bill savings. Such savings may be associated with investment decisions relating to building envelope improvements; HVAC equipment improvements; delivery system efficiency improvements; and fuel switching. The results can also be used for assessing the cost/benefit of behavioral changes, such as changing thermostat temperature settings. Similarly, the results can be used for optimizing an HVAC control system algorithm based on current and forecasted outdoor temperature and on current and forecasted solar irradiance to satisfy consumer preferences in a least cost manner. Finally, the results can be used to correctly size a photovoltaic (PV) system to satisfy needs prior to investments by anticipating existing energy usage and the associated change in usage based on planned investments.

Abstract: Methods and systems are described for determining occupancy with user provided information. According to at least one embodiment, a method for determining occupancy with user provided information includes using at least one sensor to detect occupancy in a building over time, determining a predictive schedule based on the occupancy detected with the at least one sensor, and requesting information relevant to the predictive schedule from a user.

Abstract: According to various aspects, exemplary embodiments are disclosed of blow through direct fired heaters including evaporator coils and/or energy recovery ventilation.

Abstract: A free cooling outdoor unit includes: a refrigerant circuit through which refrigerant circulates; a brine circuit through which brine circulates; a water circuit through which water circulates; a fan configured to send air to the second heat exchanger; a flow control valve configured to control a circulation amount of the brine in the brine circuit; a water temperature detection sensor configured to detect a water temperature in the water circuit; an outside air temperature sensor; and a controller configured to control, where the outside air temperature is equal to or lower than a freezing temperature of the brine, the circulation amount of the brine based on the water temperature such that a brine temperature is prevented from reaching a temperature equal to or lower than the freezing temperature of the brine.

Abstract: A simulation system for designing a heating ventilation and air conditioning (HVAC) system is provided. The system comprises an input interface configured to accept thermal data indicative of a target distribution of thermal state and environmental data, and a memory configured to store a building envelope model (BEM), an airflow dynamics model (ADM), and an HVAC model. The simulation system further comprises a processor configured to process the environmental data with the BEM to estimate thermal state of the air at the walls of the environment, and determine one or more design variables, by minimizing a multi-objective cost function. The simulation system further comprises an output interface configured to output the one or more design variables.

Abstract: This disclosure details integrated thermal management systems for thermally managing electrified vehicle components. Exemplary integrated thermal management systems may include a thermal module assembly that may be integrated into a front end structure of a flexible modular platform of the electrified vehicle. The integrated thermal management systems may be controlled in a plurality of distinct thermal control modes for thermal managing various subcomponents and for addressing various vehicle auxiliary loads (e.g., passenger cabin heating loads, passenger cabin cooling loads, etc.).

Abstract: A computer-implemented method for anomaly detection in a data processing system comprising a processor and a memory comprising instructions which are executed by the processor, the method including: receiving, by the processor, a real-time airflow pattern detected from an airflow alerter, wherein the real-time airflow pattern is generated by a heating, ventilation, and air conditioning (HVAC) system in a particular facility; comparing, by the processor, the real-time airflow pattern to a predetermined airflow pattern for the HVAC system; and when the real-time airflow pattern is different from the predetermined airflow pattern, receiving, by the processor, an alert message indicating an anomaly from the airflow alerter.

Abstract: The invention relates to a device for moistening and/or fertilizing plants (1), comprising a movable spray lance (3) with at least one spray nozzle (4) arranged on the spray lance (3), wherein a preferably linear guide rail (2) is provided, wherein the spray lance (3) is movably guided in the guide rail (2) in a trajectory extending parallel to the guide rail (2) and extends substantially normal to this trajectory, and wherein a drive, preferably a linear drive (11), is arranged for moving the spray lance in the area of the guide rail (2). The invention further relates to a system for cultivating plants without a substrate, comprising the device according to the invention.

Abstract: A hydroponic apparatus includes a cultivation tank and planting containers. The cultivation tank includes an inner space and a top planting groove. Each of the planting containers includes a container body and a container brim The planting containers can be arranged on the planting groove along a width direction of the planting groove, and the planting containers can be moved along a length direction of the planting groove. A hydroponic method includes: placing the planting containers at n positions arranged along the planting groove, wherein each position corresponds to a plant growth and development stage, and is consistent with an order of the plant growth and development stages; and harvesting the plant at the position n at a specified time point, and moving the planting containers at other positions one by one to the positions corresponding to the next plant growth and development stages.

Abstract: A system, method, and air purification device. Air is taken in from an environment into the air purification system. The air is prefiltered. The air is filtered with a primary filter. The filtered air is treated with vacuum ultraviolet radiation in a primary reaction chamber to generate irradiated air. The irradiated air is treated with ultraviolet-C radiation in a secondary reaction chamber to remove ozone. Ozone and other contaminants are removed from the irradiated air utilizing a carbon filter to generate purified air. The purified air is emitted back into the environment from the air purification system.

Abstract: A cooling system includes a first cooling loop, a second cooling loop and a heat exchanger configured to transfer heat from the first cooling loop to the second cooling loop. The first cooling loop includes a vapor/liquid separation feature configured to separate vapor present in the first cooling loop due to a leak between the first cooling loop and the second cooling loop. The first cooling loop also includes a pressure sensor configured to detect an increase in pressure in the first cooling loop that may result from a leak of second coolant into the first cooling loop.

Abstract: This disclosure relates generally to cabinets for commercial heating, ventilation, air conditioning and refrigeration (HVACR) systems. More particularly, this disclosure relates to HVACR cabinets including one or more plenum fans located in a fan box. The fan box may be located between an indoor coil and a heat exchanger compartment of an HVACR unit. The fan box may be configured to direct air into a heat exchanger compartment inlet. The fan box may be parallel with or angled with respect to the indoor coil.

Abstract: A pneumatic radiation air conditioner includes: a radiation unit configured to radiate air-conditioning air; and a fan configured to feed the air-conditioning air to the radiation unit. The radiation unit includes: a first chamber, through which the air-conditioning air flows; a second chamber configured to take in the air-conditioning air discharged from the first chamber and discharge the air-conditioning air and radiate heat of the air-conditioning air to a space to be air conditioned; and an air stream adjuster configured to adjust air velocity distribution and air volume distribution of the air-conditioning air that is discharged from the first chamber to the second chamber.

Abstract: A system for controlling air quality of a building space includes an air quality sensor configured to sense the air quality of the building space, an exhaust fan configured to exhaust air from inside the building space to outside the building space, a switch device configured to control the exhaust fan to exhaust the air from inside the building space to outside the building space, and a controller comprising a processing circuit. The processing circuit is configured to determine an air quality level of the building space based on the air quality sensor, determine whether the air quality level is less than an air quality threshold, and cause the switch device to operate the exhaust fan to exhaust air from inside the building space to outside the building space in response to a determination that the air quality level is less than the air quality threshold.

Abstract: Performance of a system may be boosted with a boost dock that seals fan interfaces to improve airflow through an information handling system. An apparatus may include a first port configured to seal a first interface between the apparatus and an information handling system. The apparatus may also include a first blower configured to receive ambient air as cool intake air and to blow the cool intake air into the information handling system through the first interface sealed by the first port. The apparatus may further include a second blower configured to receive warm exhaust air from the information handling system through the first interface sealed by the first port and to blow the warm exhaust air out of the apparatus. A method may include steps of sealing a first interface, receiving ambient air, blowing cool intake air, receiving warm exhaust air, and blowing warm exhaust air.

Abstract: Within a warm circuit, a first heat exchanger is in heat exchanging contact with a heat source. A second heat exchanger is in heat exchanging contact with a space to be heated. Within a cold circuit, a third heat exchanger is in heat exchanging contact with a heat sink. A fourth heat exchanger is in contact with an external region. A valve device is to connect the warm circuit with the cold circuit. An actuating device is to switch the fourth heat exchanger into a de-icing mode. The valve device enables mixing of coolant at least partially from a portion of the warm circuit into the cold circuit.

Abstract: An indoor unit for an air conditioner is provided. The indoor unit includes a housing, and the housing including an upper base plate provided with an air inlet, a lower base plate detachably mounted to the upper base plate and provided with an air outlet, and a front cover detachably mounted to the upper base plate; a heat exchanger mounted to the upper base plate; a fan detachably mounted to the lower base plate; and a guide assembly configured to guide the lower base plate when mounting and dismounting the lower base plate.

Abstract: An air handling system for a vehicle comprises a conditioning section for controlling a temperature of a flow of air, a mixing section disposed downstream of the conditioning section with respect to a direction of the flow of the air, and a delivery section disposed downstream of the mixing section with respect to the direction of the flow of the air. The delivery section includes a first chamber, a second chamber, and a third chamber. A dividing plate separates each of the second chamber and the third chamber into a first side portion to a first side of the dividing plate and a second side portion to an opposing second side of the dividing plate. The second side portion of the third chamber is configured to primarily direct the flow of the air towards a rear seat area of the vehicle.

Abstract: A data center cooling system has an indoor portion wherein heat is absorbed from components in the data center, and an outdoor heat exchanger portion wherein outside air is used to cool a first heat transfer fluid (e.g., water) present in at least the outdoor heat exchanger portion of the cooling system during a first mode. When an appropriate time has been reached to switch from the first mode to a second mode, the outdoor heat exchanger portion of the data cooling system is switched to a second heat transfer fluid, which is a relatively low performance heat transfer fluid (compared to the first fluid). It has a second heat transfer fluid freezing point, lower than the first heat transfer fluid freezing point, and sufficiently low to operate without freezing when the outdoor air temperature drops below a first predetermined relationship with the first heat transfer fluid freezing point.

Abstract: Spiral finned elliptical tube closed circuit coolers and evaporative refrigerant condensers in which the air flow entering the unit is directed to flow across the tubes in a direction that is parallel to the tube axes and generally perpendicular to the fins produce a completely unexpected gain in capacity of 25% compared to comparable units in which the air flow is directed across/perpendicular to the tube axes.

Abstract: An air conditioning companion stabilizer system for improving the operating cooling efficiency of refrigeration cycle components in air conditioning systems integrates the refrigeration cycle components with two independent, closed loops whose operation is complementary of one another. A temperature stabilizing loop functions in ambient conditions that lower cooling efficiency and is operative to absorb heat from the refrigerant exiting the condenser, thereby lowering the temperature of the refrigerant before it arrives at the expansion valve. A secondary loop, or charging loop operating in ambient conditions that enable optimal cooling efficiency facilitates the operation of the temperature stabilizing loop by priming a rechargeable heat absorbing component.

Abstract: An air handling system includes a movable evaporative media section. The movable evaporative media section is movable between a closed position and an open position. When the movable evaporative media section is in an open position, the movable evaporative media section exposes an opening to the air flow and is positioned to allow at least a portion of the air flow in the volume to flow around the movable evaporative media section and through the opening.

Abstract: A generally planar foundation pad is formed of a material such as concrete, or the like, and supports a framework defining a plurality of concentric circular paths stacked in a cylindrical array. A plurality of helical water troughs are supported by the framework within each of the circular paths. Water circulation apparatus is provided which pumps water from the bottom of each helical water trough to the top and selected intermediate portions of the water trough to produce a continuous circulation of water. The circulating water is combined with various nutrients and the nutrient and water solution is filtered as it is circulated. Each helical water trough is formed of multiple vertically stacked layers of the trough. As a result, a great length of water trough is stacked upon a small footprint of land. Each water trough is filled with a plurality of floating growing trays to form a continuous “train” of growing trays extending down the entire water trough.

Abstract: An air conditioning system includes an electrically run air conditioner with a compressor, a storage battery that charges and supplies electric power, a demand receiver, an air-conditioning controller, and a charging controller controlling charging of the storage battery. The demand receiver receives a demand pertaining to a power consumption of the air conditioner during a predetermined period. The air-conditioning controller stores operation-associated information pertaining to operation of the air conditioner and controls the air conditioner. The air-conditioning controller causes the air conditioner to perform precooling and/or reduce the power consumption of the air conditioner in the predetermined period based on the demand and an amount of charge of the storage battery.

Abstract: Method, systems, and devices for determining instantaneous heat exchange between an airflow and a heat exchange element of an HVAC system are disclosed. In some embodiments, methods and systems include receiving or otherwise obtaining airflow data, temperature and humidity data. The airflow data may be used to calculate the volumetric airflow rate, and the temperature and humidity data may be processed with enthalpy data to determine the change in enthalpy (?h) of the airflow after encountering a heat exchange element. The instantaneous rate of heat exchange (E) between the airflow and the heat exchange element may then be determined from the volumetric airflow rate and change in enthalpy.

Abstract: A bathroom air-conditioner includes a refrigerant circuit in which a compressor, a radiator, a decompressing mechanism and a heat absorber are connected with one another through a pipe, a circulating air-course, and a ventilating air-course. In the circulating air-course, the radiator and a circulating fan for circulating the air of the bathroom are placed. In the ventilating air-course, the heat absorber and a ventilating fan for discharging the air from the bathroom to the outside are placed. The heat absorber makes the refrigerant absorb heat from the air of the bathroom, and the radiator makes the refrigerant dissipate heat to the air of the bathroom for heating the bathroom. During the heating of the bathroom, when a temperature of the bathroom becomes higher than a given temperature, a controller reduces an air-blow amount from the ventilating fan.

Abstract: In accordance with one embodiment, an air conditioner unit is provided. The air conditioner unit includes a heater housing having peripheral surfaces defining a housing interior, the peripheral surfaces including a first sidewall and a second sidewall spaced apart along the lateral direction. The air conditioner unit further includes a guide track extending along the lateral direction between the first sidewall and the second sidewall. The air conditioner unit further includes a blower fan, the blower fan including a blade assembly disposed within the interior and a motor connected to the blade assembly. The air conditioner unit further includes a heating unit comprising a first bracket and a second bracket spaced apart along the lateral direction. The heating unit further includes at least one heater bank extending along the lateral direction between the first bracket and the second bracket. The heating unit is movable along the guide track.

Abstract: The invention relates to a ventilation device (1) adapted to control the airflow paths of a first (3) and a second (5) airflow to alternately flow to or from a first and a second heat-absorbing body in order to achieve a heat transfer between the two airflows. The device comprises a first airflow channel (7) adapted to be connected with and lead an airflow to or from the first heat-absorbing body and a second airflow channel (13) adapted to be connected with and lead an airflow to or from the second heat-absorbing body.

Abstract: Heat is indirectly transferred between a process fluid and ambient air in apparatus that includes an evaporative heat transfer cell operative in a wet mode or a dry mode, a dry heat transfer cell and a fan. The air may bypass the dry heat transfer cell to flow through a first air passage or may flow through a second air passage through the dry heat transfer cell and in either event, then through the evaporative heat transfer cell. The air may partially flow through and partially bypass the dry heat transfer cell, and then through the evaporative heat transfer cell. The evaporative heat transfer cell optionally may include a direct contact evaporative heat exchanger.

Abstract: Apparatus and methods provide for a dual pass air flow configuration in an air conditioning system to improve efficiency and performance of the air conditioning system. An air conditioning device includes a pre-conditioned air passage chamber separated from a post-conditioned air passage chamber by an impermeable partition. A coil system separates the pre-conditioned air passage chamber and the post-conditioned air passage chamber from a partially-conditioned air passage chamber. The coil system is configured to receive air from the pre-conditioned air passage chamber and to condition the air passing through the coil system into the partially-conditioned air passage chamber. The coil system is also configured to receive the air from the partially-conditioned air and further condition the air as it passes through the coil system into the post-conditioned air passage chamber.

Abstract: A monitoring system for an HVAC system including an evaporator unit device, first and second temperature sensors, and a condenser unit. The evaporator unit device includes a first current sensor that measures current provided to a circulator blower and a differential pressure sensor that measures pressure between a point prior to a filter element and a point after the filter element. The first temperature sensor measures a refrigerant temperature between a condenser and an expansion valve. The second temperature sensor measures a refrigerant temperature between an evaporator and a compressor. The condenser unit device communicates with the evaporator unit device over low-voltage control lines, wherein the condenser unit comprises a second current sensor that measures current provided to the compressor. The evaporator unit device transmits sensor data to a remote monitoring service over a data network. An efficiency of the HVAC system is calculated based on the sensor data.

Abstract: A storage compartment assembly is located within the interior of a compartment of a refrigerator such as a fresh food compartment of a refrigerator. The storage compartment assembly includes a storage container the temperature of which can be controlled independently of the temperature in the fresh food compartment. At least one of the sides of the storage container can be spaced away from a respective interior side of the refrigerator compartment and a housing located in the space between the side of the storage container and the interior side of the refrigerator compartment. The housing can contain components that are configured to function in the operation of the refrigerator, including the storage compartment assembly. The refrigerator can comprise a bottom-mount refrigerator and the fresh food compartment can be provided with double-doors for closing and opening the interior of the fresh food compartment.

Abstract: An energy efficient HVAC system. The system provides a bypass air supply duct, an air handler having a bypass air supply circuit, and an air supply unit that utilize return air as a source of heat that would otherwise need to be provided by a heating coil if the air, cooled sufficiently to service interior zones of a building, is too cold for servicing perimeter zones of the building, as is typically the case when the outside air temperature is low.

Abstract: An air conditioner includes an indoor unit, an outdoor unit including an outdoor fan, a sensor unit mounted at an upper portion of the outdoor unit to sense snow piled up on the outdoor unit, and a control unit to determine whether snow is piled up or not based on an output from the sensor unit and control an operation of the outdoor fan to remove snow when snow is piled up based on the determination. The sensor unit includes a photo sensor and a temperature sensor.

Abstract: Heating, ventilating and air conditioning are provided to a temporary, flexible shelter, especially in a rugged, remote and/or extreme environment, including locations and/or conditions where access to electric power may be limited and/or expensive. A portable system may include a light weight HVAC unit, with variable-speed components that are dynamically managed for efficiency, reliability and safety, and a flexible, self-insulating duct for connecting the HVAC unit to the temporary shelter.