Carrier Corporation

Hui Zhai

Guangyu Shen

YuHui Kuang

Jian Ni

Yu Zhu

Runfu Shi

Xiangyu Gao

Liang Chang

Qing Lu

Xiaojun Guo

Xiaohong Wang

Michael J Birnkrant

Hongsheng Liu

Shuguang Zhang

Qing Liu

Jinxiang Wang

Shuang Lu

Zehang Yu

Guang Zhang

Yuhui Kuang

The present application relates to a power failure detection circuit, the circuit comprises: a rectifying circuit for full-wave rectifying an alternating current voltage so as to obtain a first voltage; a switching circuit for converting the first voltage into a periodic voltage pulse; and a judgment circuit for providing an output signal to a fan control circuit for closing a fan when the periodic voltage pulse is not received within a preset time period, and providing the output signal to a micro-control unit for closing an electronic expansion valve. The present application also relates to a control circuit for a variable refrigerant flow VRF system.

Power failure detection circuit and control circuit for VRF system

The present application relates to a battery box, the battery box comprising: a charging and energy storage unit for charging and storing electrical energy using an input voltage supplied to the battery box; a power failure detection unit for detecting a power failure of the input voltage; and a power output switching unit for switching an output based on a detection result of the power failure detection unit, wherein the power output switching unit is configured to output a voltage from the charging and energy storage unit when the power failure detection unit detects a power failure, and is configured not to output the voltage when the power failure detection unit does not detect the power failure. The present application also relates to an air conditioning system and a control method for the air conditioning system.

Battery pack, air conditioning system, and method for the same

A heat pump system includes a compressor; an indoor heat exchanger; an outdoor heat exchanger configured as an interlaced heat exchanger having at least two refrigerant flow paths; a plurality of throttling elements; and a first type four-way valve and a second type four-way valve, with ports thereof respectively connected to the inlet and the outlet of the compressor, the indoor heat exchanger, and one of the at least two refrigerant flow paths of the outdoor heat exchanger; in a local defrosting mode, refrigerant from the outlet of the compressor flows respectively through the indoor heat exchanger and at least one of the at least two refrigerant flow paths of the outdoor heat exchanger, and then sequentially through the throttling elements, at least the other of the at least two refrigerant flow paths of the outdoor heat exchanger, and the inlet of the compressor.

Heat pump system and control method thereof

An air purification includes a body portion, having a first installation space, a second installation space and a third installation space; a positive/negative ion module, removably mounted in the first installation space and controlled to generate positive ions and/or negative ions; a plasma module, removably mounted in the second installation space and controlled to generate plasmas; and a power supply module, removably mounted in the third installation space and configured to supply power for the positive/negative ion module and the plasma module.

Air purification device

A heat pump system includes a first unit; a second unit connected to a first flow path of the first unit; and a third unit connected to a second flow path of the first unit and connected to the second unit. The heat pump system can operate in a cooling and water heating mode and a heating and water heating mode, wherein, in the cooling and water heating mode, the heat pump system is configured to switch a switching assembly to a first position and connect the at least one first heat exchangers and the second heat exchanger in series; in the heating and water heating mode, the heat pump system is configured to switch the switching assembly to a second position and connect the second heat exchanger and the at least one third heat exchangers in parallel.

Heat pump system

The present application provides an outdoor unit and a heat pump system. The outdoor unit includes a compressor, a valve assembly, an outdoor heat exchanger, a first pipeline port and a second pipeline port; a first branch that connects the valve assembly and the first pipeline port, the first branch being provided with the outdoor heat exchanger and a first switch valve assembly; a second branch that connects the mode switch valve assembly and the first pipeline port, wherein the second branch is provided with a second switch valve assembly; a third branch that connects the second pipeline port and the refrigerant inlet of the outdoor heat exchanger. The first and second switch valve assemblies control the on and off of the first branch and the second branch so that the refrigerant flows through the refrigerant inlet and the refrigerant outlet of the outdoor heat exchanger.

Outdoor unit and heat pump system

An apparatus and a method for detecting refrigerant leakage in an air source heat pump system. The method for detecting refrigerant leakage in an air source heat pump system includes the following steps in a cooling mode: S: obtaining a running parameter of an air source heat pump system, wherein the running parameter at least includes a compressor rotational speed; S: comparing the running parameter with a preset running parameter range; S: updating a cumulative score when the running parameter falls within the preset running parameter range; and S: when the cumulative score exceeds a predetermined cumulative score, determining that refrigerant leakage occurs, and when the cumulative score does not exceed the predetermined cumulative score, return to step S

Detection apparatus and method for refrigerant leakage of air source heat pump system

A heat cycle system and a control method. The heat cycle system includes: driving devices, one or a plurality of outdoor units, and a plurality of indoor units, which are connected by pipelines; a bypass pipeline for the plurality of indoor units, a bypass valve being disposed in the bypass pipeline; a pressure sensor that senses a pressure difference &#x394;Pacross the plurality of outdoor units; and a controller that is preset with a pressure difference set value &#x394;P, wherein the controller calculates a pressure offset parameter &#x394;P=&#x394;P&#x2212;&#x394;Pand adjusts an opening degree of the bypass valve based on the pressure offset parameter &#x394;P so that the pressure offset parameter &#x394;P approaches zero, and wherein the controller is preset with a first pressure offset threshold P, and the controller is configured such that closed indoor units enter a bypass mode one by one when &#x394;P&#x3e;P, until &#x394;P&#x2264;P.

Thermal cycling system and control method of the thermal cycling system

An air conditioning system and a control method thereof. The air conditioning system includes: a plurality of indoor units connected in parallel; a plurality of outdoor units connected in parallel; and a coolant circulation circuit which circulates coolant through each of the indoor units connected in parallel and each of the outdoor units connected in parallel respectively, and which exchanges heat with each of the indoor units and each of the outdoor units; wherein the air conditioning system further includes a controller which, based on a number of actively operating indoor units, a total number of the indoor units and a total number of the outdoor units, defines an upper limit of a number of actively operating outdoor units, so that the flow rate of the coolant flowing through the actively operating outdoor units is not lower than a preset flow rate.

Air conditioning system and control method therof

A heat exchange unit, a heat exchange system, and a method of determining the failure of a control valve in the heat exchange system. The heat exchange unit includes: a first flow path; and a second flow path at least partially located within the first flow path to exchange heat with the first flow path, one of the inlet and the outlet of the second flow path being connected to the main flow path of the external heat exchange system through a control valve; a first temperature sensor at the inlet of the first flow path to sense a first temperature T; a second temperature sensor at the outlet of the first flow path or the second flow path within the first flow path to sense a second temperature T; and a processor configured to determine whether the control valve fails.

Heat exchanging unit, a heat exchanging system and a method of determining failure of a control valve therein

A refrigerant leak detecting method for an air-cooling heat pump system in a heating mode comprises S, S, obtaining a leak indication parameter set, wherein the leak indication parameter set at least includes a refrigerant level in a liquid reservoir and/or a supercooling degree; S, S, comparing each leak indication parameter in the leak indication parameter set with a corresponding preset indication parameter interval; S, S, when each leak indication parameter falls within a corresponding preset indication parameter interval, obtaining and recording a corresponding evaluated refrigerant leak amount; S, S, when a cumulative value of the evaluated refrigerant leak amount falls within a preset refrigerant leak interval, determining that a refrigerant leak occurs in the air-cooling heat pump system; when the cumulative value of the evaluated refrigerant leak amount does not fall within the preset refrigerant leak interval, returning to the step S, S

Air cooling heat pump system, refrigerant leakage detection method and detection system air cooling heat pump system thereof

A steady-state data processing method includes resetting a cumulative change of target determination data and a data detection period as 0; obtaining the detected target data; calculating the cumulative change of the target data. When the calculated cumulative change of the target data is less than a preset threshold, adjusting the data detection period, or when the calculated cumulative change of the target data is not less than the preset threshold, recording a data detection period. When the recorded data detection period is less than a preset time threshold, determining a target data result obtained in the period as unsteady-state data of the device; or when the recorded data detection period is not less than the preset time threshold, determining the target data obtained in the data detection period as steady-state data.

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Shanghai, China

Hui Zhai