Air conditioning device
An air-conditioning and air-conditioning technology, which is applied to electrical devices, electrical components, transportation and packaging, etc., can solve problems such as immediate repairs and achieve high redundancy
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Embodiment approach 1
[0025] figure 1 It is a figure which shows an example of the system centering on the air-conditioning apparatus concerning Embodiment 1 of this invention. Here, in Embodiment 1, as an air-conditioning apparatus, for example, an air-conditioning apparatus for a railway vehicle that air-conditions the interior of a vehicle as an air-conditioning target space will be described as an example. In Embodiment 1, there is provided a power supply device 10 that controls to supply electric power from the auxiliary power supply device 1 for a railway vehicle to the two compressors 2A and 2B constituting the air conditioner for a railway vehicle. Here, the compressor 2A and the compressor 2B constitute a refrigerant circuit included in the air-conditioning apparatus together with the condenser, the decompression device, and the evaporator. The refrigerant circuit included in the air-conditioning apparatus may be configured such that the compressor 2A and the compressor 2B are connected i...
Embodiment approach 2
[0061] In the air conditioning apparatus of Embodiment 1, such as Figure 4 As shown, when the total power supplied to the compressor 2A and the compressor 2B is 50% or more of the rated power, power is supplied to one compressor 2 via the power conversion device 3 , and power is supplied to the other compressor 2 . Electric power is directly supplied from the auxiliary power supply device 1 for railway vehicles. By driving the compressor 2 via the power conversion device 3 , fine air-conditioning control near the maximum air-conditioning capacity can be performed.
[0062] On the other hand, for example, when the vehicle operation service starts, since the temperature difference between the air-conditioning temperature command value as the target temperature and the passenger room temperature as the actual temperature is large, the operation of the air-conditioning device must continue to perform the maximum air-conditioning for a long time. ability to operate. At this time...
Embodiment approach 3
[0068] The air-conditioning apparatus according to Embodiment 3 alternates the compressors 2 connected to the auxiliary power supply apparatus 1 for railway vehicles at arbitrary timing. The device configuration is the same as that described in Embodiment 1 figure 1 Same composition.
[0069] When starting the compressor 2 by supplying electric power via the power conversion device 3 , the driving rotation speed of the compressor 2 can be gradually increased. On the other hand, when the compressor 2 is started by directly supplying electric power from the auxiliary power supply device 1 for railway vehicles, the compressor 2 is easily subjected to mechanical stress because it starts driving at a high driving speed immediately after the electric power supply. If the mechanical stress accumulates, the life of the compressor 2 may be shortened. Therefore, when a plurality of compressors 2 are used for operation, if the compressors 2 that are directly supplied with power from th...
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