The invention belongs to the technical field of air conditioners and aims at solving the problems that a fan is prone to being corroded and huge hidden safety hazards exist when an existing air conditioner is used for performing spraying cooling on an outdoor unit by means of condensate water produced by an indoor unit. To achieve the purpose, the invention provides an air conditioner and a control method thereof. The air conditioner comprises an indoor heat exchanger and an outdoor heat exchanger, and further comprises a water collecting component and a cooling pipe stack communicating with the water collecting component. The cooling pipe stack is arranged on the outdoor heat exchanger or is close to the outdoor heat exchanger. The water collecting component can be used for collecting condensate water produced by the indoor heat exchanger. The cooling pipe stack can be used for cooling the outdoor heat exchanger through the condensate water collected by the water collecting component.The control method comprises the steps that the air conditioner is made to execute a refrigerating mode; the condensate water produced by the indoor heat exchanger is collected; the collected condensate water is conveyed to the cooling pipe stack; and the outdoor heat exchanger is cooled. By means of the air conditioner provided by the invention, the condensate water can be prevented from makingcontact with electrical components such as a fan of an outdoor unit, and therefore, hidden safety hazards are eliminated.

Air conditioner and control method thereof

A refrigerator includes a carbonated water tank in which carbonated water is stored; a water level sensor sensing a water level of carbonated water stored in the carbonated water tank; a water tank supplying filtered water to the carbonated water tank; a carbon dioxide cylinder supplying carbon dioxide to the carbonated water tank; and a controller, if the water level of carbonated water sensed by the water level sensor is less than or equal to a predetermined minimum water level, supplying the filtered water to the carbonated water tank, and if supply of the filtered water is completed, supplying the carbon dioxide to the carbonated water tank so as to produce the carbonated water. If the carbonated water is discharged, the controller controls the water level sensor to sense the water lever of the carbonated water stored in the carbonated water tank.

Refrigerator and method of controlling the same

An air conditioning apparatus is capable of being mounted on the ceiling of an air-conditioned room. The air conditioning apparatus includes a casing in which an intake port is formed in a bottom surface, a filter provided in the intake port, a cleaning mechanism for removing dust collected by the filter from the filter, and a dust box provided at the bottom of the casing to collect dust removed by the cleaning mechanism. A nozzle insertion hole through which a nozzle of a vacuum cleaner can be inserted is formed facing downward in the dust box.

Air-Conditioning apparatus

A gas-injection type refrigeration-cycle device has heat exchanger where refrigerant extracts waste heat from heating devices. In the refrigeration-cycle device, the mode is changed between where lower-pressure refrigerant extracts heat and where intermediate-pressure refrigerant extracts the heat of the hot water. The lower-pressure refrigerant is drawn into compressor, after heat exchanger is set at the lower-pressure side of the refrigeration cycle. The intermediate-pressure refrigerant is introduced into compressor-gas-injection port, after heat exchanger is set at the intermediate-pressure side of the refrigeration cycle. In another aspect, a defrosting mode of outdoor heat exchanger includes a heating mode, and gas refrigerant discharged from compressor flows through condenser without heat exchange. Thereafter, the flow of the gas refrigerant is divided to two portions, and the gas refrigerant of one portion flows into outdoor heat exchanger, thereby defrosting outdoor heat exchanger. The other portion flows into evaporator, thereby heating blown air within an air-conditioning duct by evaporator.

Refrigeration cycle device

The purpose of the invention is to provide an air conditioning system (100) that can control power consumption and maintain a constant room temperature. An air conditioning system comprises: a refrigerant circuit in which a compressor (5), a heat source side heat exchanger (6), a throttling device (11) and a load side heat exchanger (10) are sequentially connected via piping; an inverter (16) that drives the compressor (5); an indoor temperature detector (14) that detects the indoor temperature; and a controlling device (13) that receives a signal to turn on the thermostat and a signal to turn off the thermostat and that controls the inverter (16) in accordance with the signal to turn on the thermostat and the signal to turn off the thermostat. The controlling device (13) assumes the indoor temperature at the time the signal to turn off the thermostat is received is the set temperature and controls the output frequency of the inverter (16) so that the difference between the indoor temperature and the set temperature is within a reference range.

Air-conditioning system

It is intended to realize an air conditioning system of high operational efficiency without reducing the user's comfort. In an air conditioning system 1, a set temperature determining device 31 determines a target temperature of water to be supplied to an indoor heat exchanger 12, based on ["target outflow temperature" = "current outflow temperature" + (("inlet and outlet temperature difference" / "indoor and outdoor temperature difference") × "set temperature difference")]. The indoor and outdoor temperature difference is a difference between an indoor temperature and an outdoor temperature, the inlet and outlet temperature difference is a difference between temperatures of water at the inlet side and the outlet side of an intermediate heat exchanger 9, and the set temperature difference is a difference between an indoor temperature and a set temperature. A control device 32 controls an outdoor unit 2 in response to the target temperature determined by the set temperature determining device 31.

Air conditioning system and method of controlling air conditioning system

It is intended to realize an air conditioning system of high operational efficiency without reducing the user's comfort. In an air conditioning system 1 , a set temperature determining device 31 determines a target temperature of water to be supplied to an indoor heat exchanger 12 , based on [“target outflow temperature”=“current outflow temperature”+((“inlet and outlet temperature difference”/“indoor and outdoor temperature difference”)×“set temperature difference”)]. The indoor and outdoor temperature difference is a difference between an indoor temperature and an outdoor temperature, the inlet and outlet temperature difference is a difference between temperatures of water at the inlet side and the outlet side of an intermediate heat exchanger 9 , and the set temperature difference is a difference between an indoor temperature and a set temperature. A control device 32 controls an outdoor unit 2 in response to the target temperature determined by the set temperature determining device 31.

Air conditioning system and control method of air conditioning system

Provided is a heat pump device (40) configured to collect heat both from outside air and another heat source. A controller (30) calculates heat exchange amounts with use of heat exchange performance of each of an air heat-source heat exchanger (5a) and an underground heat-source heat exchanger (5b) in addition to an outside air temperature and an underground temperature. Then, in switching between a simultaneous operation of causing refrigerant to flow through both of the air heat-source heat exchanger (5a) and the underground heat-source heat exchanger (5b) and a single operation of selecting the air heat-source heat exchanger (5a) or the underground heat-source heat exchanger (5b) to cause refrigerant to flow therethrough, the controller (30) selects a heat source having a larger calculated heat exchange amount. In this manner, an appropriate heat source suitable for operation conditions can be selected.

Heat pump device

In a double-pipe heat exchanger, a groove non-forming range is set as a non-groove surface in each of, in an inner surface of a heat transfer area increasing pipe, an inner surface of a part of the heat transfer area increasing pipe, which is held in close contact with an inner surface of an outer pipe, and a part of the inner surface of the outer pipe, which defines a second flow path in cooperation with an outer surface of the heat transfer area increasing pipe.

Double-pipe heat exchanger and refrigeration cycle system

In a refrigeration cycle system, switching is allowed between a parallel operation mode and a series operation mode. In the parallel operation mode, a refrigerant, upon leaving a load side heat exchanger, parallelly flows through a high-pressure side passage of each of a first internal heat exchanger and a second internal heat exchanger and then flows into an expansion valve. In the series operation mode, the refrigerant, upon leaving the load side heat exchanger, flows through the high-pressure side passage of the first internal heat exchanger, further flows through the high-pressure side passage of the second internal heat exchanger, and then flows through a high-pressure side bypass pipe into the expansion valve.

Yohei Kato

Papers

Air conditioning system and method of controlling air conditioning system

Air conditioning system and control method of air conditioning system

Heat pump device

Double-pipe heat exchanger and refrigeration cycle system

Refrigeration cycle system