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Air conditioner

A technology for air conditioners and compressors, applied to refrigerators, compressors, compressors with reversible cycles, etc., can solve the problems of increased cost and high price of power relays, and achieve low-cost effects

Active Publication Date: 2020-09-15
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since power relays are expensive, there is a problem of cost increase if power relays are used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0027]

[0028] (The overall structure of the air conditioner)

[0029] figure 1 It is a diagram of the refrigerant cycle system of the air conditioner 900 according to the first embodiment of the present invention. like figure 1 As shown, the air conditioner 900 of the present embodiment includes an outdoor unit 960 and an indoor unit 970 , and further includes a gas pipe 982 and a liquid pipe 984 connecting them.

[0030] Furthermore, the outdoor unit 960 includes a compressor 961 , a four-way valve 8 , an outdoor heat exchanger 963 , and an outdoor expansion valve 964 . These are sequentially connected by pipes (no reference numerals). In addition, the outdoor unit 960 includes an outdoor fan 965 and an outdoor fan motor 16 . The outdoor fan 965 is rotationally driven by the outdoor fan motor 16 to cool the outdoor heat exchanger 963 .

[0031] In addition, the indoor unit 970 includes an indoor heat exchanger 973 and an indoor expansion valve 974 . Both are connect...

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PUM

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Abstract

The invention provides an air conditioner which can drive a four-way valve of the air conditioner with a low-cost structure. An air conditioner is provided with: a charge storage unit (50) having first and second capacitors (52, 54) connected in series via one end (58) of an excitation coil (10) of a four-way valve (8); a rectifier circuit (40) that rectifies the AC voltage and charges the chargestorage unit (50); a switching unit (70) connected in parallel to the charge accumulation unit (50) and having first and second switching elements (72, 74) connected in series via the other end (78) of the excitation coil (10); and a control unit (24) that drives the first switching element (72) by a first PWM signal (S10) when the excitation coil (10) is energized in the first direction (Dr), anddrives the second switching element (74) by a second PWM signal (S12) when the excitation coil (10) is energized in the second direction (Da).

Description

technical field [0001] The present invention relates to air conditioners. Background technique [0002] As the background technology of this technical field, claim 1 of the following patent document 1 states that "the refrigerant control valve is characterized by comprising: a coil wound into a cylinder; directed in a predetermined direction in a magnetic field; a spring that directs the plunger in a direction opposite to the predetermined direction; a permanent magnet that is excited by the coil and passes through the spring when the plunger is directed in a predetermined direction by a certain amount or more The plunger is held in a position in a predetermined direction against the force of the plunger; a member that switches the flow of refrigerant based on the position of the plunger; and an intermittent control section, which intermittently energizes the DC power in the positive direction or the reverse direction to the coil, and the refrigerant control valve is set to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B13/00F25B49/02F25B41/04
CPCF25B13/00F25B2313/02741F25B2400/19F25B2600/25
Inventor 黑崎真由高野玲央小仓洋寿上田和弘尾花紫织
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC