摘要:
There are provided a plurality of use-side heat exchangers 30, inter-heat-medium heat exchangers 14a and 14b, heat medium flow path switching devices 32 and 33, which switch flow paths, and pumps 31 a and 31 b, which feed heat media to these paths; the inter-heat-medium heat exchangers 14a and 14b heat or cool a heat medium by exchanging heat between the heat medium and a heat source fluid fed from a heat source apparatus 1. About half of the plurality of use-side heat exchangers 30 are preheated or precooled, and the remaining use-side heat exchangers 30 which are not preheated or precooled exchange heat media with use-side heat exchangers 30 that have been preheated or precooled and that are not yet started to operate, suppressing energy consumed for preheating or precooling.
摘要:
To obtain an air-conditioning apparatus which is able to prevent an accident due to a breakdown or lowering of an energy-saving efficiency in an end stage of product life before occurrence by detecting a state in which the breakdown or the lowering of the energy-saving efficiency in association with deterioration with age is occurred, or a state which is susceptible to the occurrence of the breakdown or the lowering of the energy-saving efficiency in association with the deterioration with age. A measuring unit 103 configured to acquire operating-state data of the air-conditioning apparatus, a controller 101 configured to control at least one of the operating capacity of a compressor 1, the air volume of an outdoor air blower 4, the air volume of an indoor air blower 8, and the opening of an expansion valve 5, and a storage 104 for storing the operating-state data are provided therein, and the controller 101 stores information about the operating-state data in the storage 104 when the operating-state data satisfies predetermined conditions, compares the operating-state data stored in the storage 104 and current operating-state data, and detects an abnormal state or a symptom of abnormality of the air-conditioning apparatus.
摘要:
An air conditioning system (100) has an air conditioner (10), which includes an outdoor unit (20) and an indoor unit (30) that configure a refrigerant circuit (RC), and a controller (70), which controls the running of the air conditioner (10). The controller (70) does not allow operation of the air conditioner (10) to start in a case where a signal from a ventilation unit (40) that includes a ventilation fan (43, 44) for ventilation and ventilates a target space (SP) or a refrigerant leak sensor (60) that detects refrigerant leakage in the target space (SP) is not input to the controller (70). Because of this, even in a configuration where an air conditioner and a ventilation unit are installed independently of each other, operation of the air conditioner can be performed in a state in which there is reliably established a countermeasure such as the ventilation unit being operated when the refrigerant has leaked, and safety and security with respect to refrigerant leakage are reliably ensured.
摘要:
An air-conditioning apparatus, wherein operating efficiency is improved and energy conservation is achieved. An operation control apparatus (80) of air-conditioning apparatus having an outdoor unit (20) and indoor units (40, 50, 60) that includes a usage-side heat exchangers (42, 52, 62), the air-conditioning apparatus (10) performing indoor temperature control for controlling equipment provided to the indoor units so that the indoor temperature approaches a set temperature, wherein the operation control apparatus comprises required temperature calculation parts (47b, 57b, 67b) for calculating required evaporation temperatures or required condensation temperatures on the basis of either current amounts of heat exchanged in the usage-side heat exchangers and greater amounts of heat exchanged in the usage-side heat exchangers than the current amounts, or an operating state amount that yields the current amounts of heat exchanged in the usage-side heat exchangers and an operating state amount that yields greater amounts of heat exchanged in the usage-side heat exchangers than the current amounts.
摘要:
The disclosure relates to a method for controlling heat transfer between a local cooling system (40, 40') and a local heating system (30, 30'), the method comprising: determining a local energy consumption need (LCC1, LCC2) of the local cooling system (40, 40'); determining a local energy consumption need (LHC1, LHC2) of the local heating system (30, 30'); controlling, based on the local energy consumption need (LCC1, LCC2) of the local cooling system (40, 40') and the local energy consumption need (LHC1, LHC2) of the local heating system (30, 30'), a heat pump (50, 50') connected between the local cooling system (40, 40') and the local heating system (30, 30') and configured to transfer heat from the local cooling system (40, 40') to the local heating system (30, 30').
摘要:
The air-conditioning control apparatus according to the present invention can conserve energy as well as maintain a comfort level. The air-conditioning control apparatus (40) includes an away detector (41), a position acquisition unit (42), a distance acquisition unit (43), and an instrument control unit (44). The away detector (41) detects that a user (92) is away from a building (90). The position acquisition unit (42) acquires position information of a portable terminal (20) carried by the user (92). Using the position information acquired by the position acquisition unit (42), the distance acquisition unit (43) acquires distance information indicating how far the portable terminal (20) is from the building (90) when the away detector (41) has detected that the user (92) is away. The instrument control unit (44) controls an air conditioner (50) installed in the building (90) on the basis of the distance information acquired by the distance acquisition unit (43) so that the air conditioner (50) consumes less energy.
摘要:
It is possible to realize flow rate control regardless of the scale on a load side or a piping system and to achieve energy saving. In a host control device (20) of a heat source system, a bypass valve opening command value is determined by an opening command value determination unit (22) such that a header differential pressure matches a target differential pressure value, and a target opening value according to the header differential pressure or the behavior of the bypass valve opening is set by a target opening value setting unit (24). A heating medium flow rate set value is determined by a heating medium flow rate setting unit (23) using the target opening value set by the target opening value setting unit (24) and the opening command value determined by the opening command value determination unit (22).
摘要:
An air conditioner capable of achieving both user comfort and power reduction is provided. The air conditioner includes a mean room temperature sensing mechanism 13 for sensing the mean room temperature of an indoor space, a normal target pressure memory 14 storing a normal target pressure set to a target value during normal control operation of a compressor controller and related with the outdoor temperature and air-conditioning load of the indoor space, a normal temperature difference computation unit 15 for calculating a temperature difference between a normal saturation temperature corresponding to the normal target pressure and the mean room temperature as a normal temperature difference, and a power reduction temperature difference computation unit 16 for calculating a power reduction temperature difference reduced from the normal temperature difference on the basis of a target power consumption decrement with respect to power consumption during normal control of the air conditioner, a compressor controller 18 is configured to control a compressor 5 by changing a power reduction target pressure, which is a saturation pressure corresponding to a power reduction saturation temperature calculated on the basis of the mean room temperature and the power reduction temperature difference, to the target value.
摘要:
An outdoor unit for an air-conditioning apparatus includes an outdoor heat exchanger; a compressor; a refrigerant pipe configured to couple the outdoor heat exchanger and the compressor with an indoor unit including an indoor heat exchanger; and a control unit that determines whether the heating capacity of the indoor unit performing a heating operation is decreased by the refrigerant stagnated in the indoor heat exchanger.
摘要:
A climate-control system may include a variable-capacity compressor unit and a control module controlling the compressor unit. The compressor unit may be operable in a first capacity mode and in a second capacity mode that is higher than the first capacity mode. The control module may be configured to switch the compressor unit among a shutdown state, the first capacity mode and the second capacity mode based on a demand signal and outdoor-air-temperature