Air conditioner

一种空调机、压缩机的技术，应用在制冷机、压缩机、机械设备等方向，能够解决损害空调机本质功能舒适性等问题，达到节能性高的效果

CN111033140AActive Publication Date: 2020-04-17MITSUBISHI ELECTRIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-04-17

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Abstract

An air conditioner comprising: a compressor having an inbuilt electric motor; a temperature sensor that detects indoor temperature; a drive circuit that drives the electric motor; a connection switching device that switches a connection for a stator winding in the electric motor to between a first connection state and a second connection state having a higher inter-line voltage than the first connection state; and a control device that performs control whereby the connection switching device is caused to perform connection switching and control whereby a thermostat is turned off which stops the compressor via the drive circuit once the indoor temperature reaches a target temperature or a correction temperature set on the basis of the target temperature. When the electric motor is in the first connection state and once the number of times the thermostat has been turned off reaches a standard number, the control device causes the connection switching device to switch connection from thefirst connection state to the second connection state.
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Description

technical field

[0001] The present invention relates to an air conditioner equipped with a compressor, and in particular, relates to connection switching of a stator winding of a motor built in the compressor. Background technique

[0002] The power required for the operation of the air conditioner generally consumes the highest proportion in the compressor, and the efficiency of the compressor greatly affects the energy saving performance of the air conditioner. In recent years, due to the development of high airtightness and high heat insulation in houses, the occurrence frequency of low-load areas has increased. In particular, the compressor operation efficiency when the compressor is operated at a low speed has increased in importance. On the other hand, there is no attenuation in the demand for high capacity to increase the rotation speed of the compressor to the limit, such as rapid cooling operation when it is hot, and rapid heating operation when the outside air is e...

Examples

Embodiment approach 1

[0031] figure 1 It is a schematic diagram showing an example of the refrigerant circuit of the air conditioner according to Embodiment 1 of the present invention. The air conditioner includes an indoor unit 1 disposed on the indoor side of an air conditioning target, and an outdoor unit 2 disposed on the outdoor side. The indoor unit 1 includes an indoor heat exchanger 5 . The outdoor unit 2 includes a compressor 3 , a four-way valve 4 , an outdoor side heat exchanger 6 , and an expansion valve 7 . The compressor 3 , the four-way valve 4 , the outdoor heat exchanger 6 , the expansion valve 7 , and the indoor heat exchanger 5 are connected in a ring shape through refrigerant piping to form a refrigerant circuit 100 . The four-way valve 4 is used to switch the air conditioner to either cooling operation or heating operation. figure 1 The figure in the middle shows the status of switching to cooling operation. Refrigerant is filled in the refrigerant circuit 100 . The kind o...