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Fan motor stopping device

A fan motor and stop device technology, applied in circuit devices, emergency protection circuit devices, DC motor deceleration devices, etc., can solve problems such as difficult to stop load action, smoothing capacitor voltage drop, failure, etc., to prevent failure Effect

Pending Publication Date: 2022-05-06
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the conventional technology, there is a problem that it is difficult to stop the operation of the load when a power outage occurs, and the voltage of the smoothing capacitor drops, so that when the power supply is restored, an overcurrent flows through a plurality of components of the air conditioner, and thus the Failure of some or all of multiple components

Method used

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Embodiment approach 1

[0018] First, the structure of the fan motor stop device 1 according to embodiment 1 will be described. Figure 1 Fig. 1 is a diagram showing the structure of the fan motor stop device 1 according to embodiment 1. The fan motor stop device 1 is a device included in the air conditioner and has a conversion circuit 2 for converting the AC voltage supplied from the AC power supply 51 into DC voltage. Figure 1 The AC power supply 51 is also shown. For example, the conversion circuit 2 is implemented by a diode bridge having a plurality of diodes. The fan motor stopping device 1 also has a noise filter 52 connected to the AC power supply 51 and removing the noise of the AC voltage supplied from the AC power supply 51. The conversion circuit 2 converts the AC voltage output from the noise filter 52 into a DC voltage.

[0019] The fan motor stop device 1 also has a surge current prevention circuit 3, which is located on the AC power supply 51 side of the conversion circuit 2 and has the f...

Embodiment approach 2

[0046] Figure 6 Fig. 1 is a diagram showing the configuration of the fan motor stop device 1A according to embodiment 2. The fan motor stop 1A has all the components of the fan motor stop 1 according to embodiment 1. The fan motor stop circuit 11 of embodiment 2 has the function of the fan motor stop circuit 11 of embodiment 1, and has the function of stopping the operation of the control microcomputer 62, relay 63 and expansion valve coil 64 included in the air conditioner. Figure 6 The microcomputer 62 for control, the relay 63 and the expansion valve coil 64 are also shown. In embodiment 2, the differences from embodiment 1 are mainly described.

[0047] An example of relay 63 is a relay for actuating the four-way valve included in the air conditioner. The expansion valve coil 64 is a coil for actuating the expansion valve included in the air conditioner. The power consumption of the control microcomputer 62, the relay 63 and the expansion valve coil 64 is relatively large. Fo...

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Abstract

A fan motor stopping device (1) is provided with: a conversion circuit (2) for converting an AC voltage supplied from an AC power supply into a DC voltage; a smoothing capacitor (5) that is connected to a fan motor (61) included in the air conditioner and smoothes the DC voltage obtained by the conversion circuit (2); a voltage detection circuit (7) that detects the voltage of the smoothing capacitor (5); and a fan motor stop circuit (11) that stops the operation of the fan motor (61) when the voltage detected by the voltage detection circuit (7) is equal to or less than a threshold value that is set in order to stop the operation of the fan motor (61).

Description

technical field [0001] The invention relates to a fan motor stopping device for stopping the action of a fan motor included in an air conditioner. Background technology [0002] In the air conditioner, in the case of power failure, the voltage of the smoothing capacitor decreases due to the load. The voltage of the smoothing capacitor is used to create a DC power supply for the operation of the microcomputer possessed by the air conditioner. If the voltage of the smoothing capacitor is lower than a certain voltage, the operation of the microcomputer stops. In the past, an air conditioner for switching the path for charging the smoothing capacitor when the voltage of the smoothing capacitor is below a certain value and the load is not in operation has been proposed (for example, refer to patent document 1). [0003] Patent document 1: Japan Tekai Bulletin No. 2012-110183 [0004] However, in the prior art, there are the following problems: it is difficult to stop the action of the...

Claims

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Application Information

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IPC IPC(8): F24F11/88F24F11/37F24F11/89
CPCF24F11/37F24F11/88F24F11/89H02P29/027H02P29/026H02H3/243H02H9/001H02H1/04H02P3/08
Inventor 山川秀敏
Owner MITSUBISHI ELECTRIC CORP
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