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CN-114008903-B - Air conditioner

CN114008903BCN 114008903 BCN114008903 BCN 114008903BCN-114008903-B

Abstract

An adjustment unit (60) adjusts the apparent power of the power supply input terminal of the air conditioner (10). A control unit (80) controls the adjustment unit (60) based on information corresponding to a target value of apparent power supplied from the air conditioner (10) to the AC power source (2).

Inventors

  • KONO MASAKI
  • Too Tian Gui Yu
  • KAWASAKI RYOJI

Assignees

  • 大金工业株式会社

Dates

Publication Date
20260508
Application Date
20200612
Priority Date
20190624

Claims (12)

  1. 1. An air conditioner connected with an AC power supply (2) is characterized in that the air conditioner comprises an adjusting part (60) and a control part (80), The adjusting part (60) adjusts the apparent power of the power input end of the air conditioner (10); The control unit (80) controls the adjustment unit (60) based on information corresponding to a target value of apparent power supplied from the air conditioner (10) to the AC power source (2), The information corresponding to the target value of the apparent power supplied from the air conditioner (10) to the ac power supply (2) is an apparent power command indicating the target value of the apparent power supplied from the air conditioner (10) to the ac power supply (2), or information on the operation state of the equipment (20) connected to the ac power supply (2) together with the air conditioner (10) other than the current.
  2. 2. An air conditioner according to claim 1, wherein: The adjustment unit (60) includes at least one of an active filter (61), a combination of a phase-advance capacitor (62 a) and a capacitor switching mechanism (62 b), and a combination of a hysteresis reactor (63 a) and a reactor switching mechanism (63 b), The active filter (61) is connected with the alternating current power supply (2); The capacitor switching mechanism (62 b) switches the connection state of the phase-advancing capacitor (62 a) and the alternating current power supply (2); The reactor switching mechanism (63 b) switches the connection state of the hysteretic reactor (63 a) and the AC power source (2).
  3. 3. An air conditioner according to claim 1 or 2, wherein: The information corresponding to the target value of the apparent power supplied from the air conditioner (10) to the AC power source (2) is information on the operation state of the equipment (20) connected to the AC power source (2) together with the air conditioner (10) other than the current, Information about the operation state of the equipment (20) connected with the AC power supply (2) together with the air conditioner (10) except for the current is input into an input part (30), The control unit (80) controls the adjustment unit (60) based on information input to the input unit (30).
  4. 4. An air conditioner according to claim 3, wherein: The input unit (30) includes a state detection unit (31), the state detection unit (31) detects an operation state of the device (20) connected to the AC power source (2) together with the air conditioner (10) other than a current, The control unit (80) controls the adjustment unit (60) based on the detection result of the state detection unit (31).
  5. 5. An air conditioner according to claim 3, wherein: the input unit (30) includes a setting unit (32), at least one of the type of equipment (20) connected to the AC power source (2) together with the air conditioner (10) and the presence or absence of equipment (20) is set by the setting unit (32), The control unit (80) controls the adjustment unit (60) based on the setting by the setting unit (32).
  6. 6. An air conditioner according to claim 1 or 2, wherein: the control unit (80) also controls the adjustment unit (60) based on information corresponding to a target value of apparent power supplied from the air conditioner (10) to the AC power source (2) during a stop period of the air conditioner (10).
  7. 7. An air conditioner according to claim 6, wherein: the adjusting part (60) comprises an active filter (61) connected with the alternating current power supply (2), The carrier frequency of the active filter (61) operating during the stop of the air conditioner (10) is lower than the carrier frequency of the active filter (61) operating during the operation of the air conditioner (10).
  8. 8. An air conditioner according to claim 6, wherein: The air conditioner comprises a cooler (65), The adjusting part (60) comprises an active filter (61) connected with the alternating current power supply (2), The cooler (65) cools the active filter (61), When the active filter (61) is operated during the stop of the air conditioner (10), the control unit (80) causes the cooler (65) to operate.
  9. 9. An air conditioner according to claim 1 or 2, wherein: the adjusting part (60) comprises an active filter (61) connected with the alternating current power supply (2), The control unit (80) changes the carrier frequency of the active filter (61) according to the temperature of the components constituting the active filter (61).
  10. 10. An air conditioner according to claim 9, wherein: the active filter (61) includes a reactor (61 b) and a switching element (61 c), The control unit (80) changes the carrier frequency of the active filter (61) according to the temperature of each of the reactor (61 b) and the switching element (61 c) included in the active filter (61).
  11. 11. An air conditioner according to claim 1 or 2, wherein: the adjusting part (60) comprises an active filter (61) connected with the alternating current power supply (2), The active filter (61) is made of a wide band gap semiconductor.
  12. 12. An air conditioner according to claim 1 or 2, wherein: the control unit (80) controls the adjustment unit (60) so that the adjustment unit (60) is continuously operated for a period of 14 hours or longer including a period of time for which a power factor discount is applied.

Description

Air conditioner Technical Field The present disclosure relates to an air conditioner. Background Patent document 1 discloses an active filter device connected to a power conversion device that receives power supply via a switchboard. The active filter device includes a current source, a first detection unit, a second detection unit, and a controller. The output of the current source is connected to the power receiving path of the power conversion device to generate a first compensation amount of current for at least one of reducing the harmonic current of the power conversion device and improving the fundamental power factor. The first detection unit detects a current flowing through a power receiving path of the power conversion device. The second detection unit detects a current flowing through a power receiving path of the switchboard. The controller calculates a first compensation amount of current based on the detection value detected by the first detection unit, calculates a second compensation amount for at least one of reducing a harmonic current in a power receiving path of the switchboard and improving a fundamental power factor based on the detection value detected by the second detection unit, and generates a current by superimposing the second compensation amount of current and the first compensation amount of current on the current source. Prior art literature Patent literature Patent document 1 Japanese patent No. 6299831 Disclosure of Invention Technical problem to be solved by the invention In the device of patent document 1, the second detection unit that detects the current supplied from the ac power supply is disposed on the power supply side of the power distribution board (specifically, between the ac power supply and the power distribution board), and the controller is disposed inside the air conditioner, so that the distance from the second detection unit to the controller becomes longer. Therefore, it is difficult to reduce costs (e.g., initial costs) including costs required for wiring between the second detection portion and the controller, costs required for manufacturing the second detection portion, and the like. Technical solution for solving the technical problems The first aspect of the present disclosure relates to an air conditioner 10 connected to an ac power source 2. The air conditioner 10 includes an adjusting unit 60 and a control unit 80, the adjusting unit 60 adjusting apparent power at a power supply input end of the air conditioner 10, and the control unit 80 controlling the adjusting unit 60 based on information corresponding to a target value of apparent power supplied from the air conditioner 10 to the ac power supply 2. In the first aspect, since It Is not necessary to provide a current sensor for detecting the currents Ir0, is0, it0 supplied from the ac power supply 2 on the power supply side of the switchboard 3, it Is possible to reduce the cost required for wiring, the cost required for manufacturing the current sensor, and the like, as compared with the case of providing such a current sensor. The second aspect of the present disclosure is characterized in that, on the basis of the first aspect, the adjustment section 60 includes at least one of an active filter 61, a combination of a phase-advance capacitor 62a and a capacitor switching mechanism 62b, and a combination of a hysteresis reactor 63a and a reactor switching mechanism 63 b. The active filter 61 is connected to the ac power supply 2, the capacitor switching means 62b switches the connection state of the phase-advancing capacitor 62a to the ac power supply 2, and the reactor switching means 63b switches the connection state of the hysteresis reactor 63a to the ac power supply 2. A third aspect of the present disclosure is characterized in that, in addition to the first or second aspect, the information corresponding to the target value of the apparent power supplied from the air conditioner 10 to the ac power supply 2 is information on the operation state of the equipment 20 connected to the ac power supply 2 together with the air conditioner 10, or an apparent power command indicating the target value of the apparent power supplied from the air conditioner 10 to the ac power supply 2. A fourth aspect of the present disclosure is the first or second aspect, wherein the information corresponding to the target value of the apparent power supplied from the air conditioner 10 to the ac power supply 2 is information on the operation state of the equipment 20 connected to the ac power supply 2 together with the air conditioner 10, the information on the operation state of the equipment 20 connected to the ac power supply 2 together with the air conditioner 10 is input to the input unit 30, and the control unit 80 controls the adjustment unit 60 based on the information input to the input unit 30. In the fourth aspect, by controlling the adjustment unit 60 based on information on the operation state o