US2026029136A1PendingUtilityA1

Air conditioner

72
Assignee: DAIKIN IND LTDPriority: Mar 31, 2023Filed: Sep 30, 2025Published: Jan 29, 2026
Est. expiryMar 31, 2043(~16.7 yrs left)· nominal 20-yr term from priority
Inventors:TAMURA AYASAKAMAKI TOMOHIKOTOYOYAMA KIYOTAKAMATSUMOTO YOSHIYUKI
F24F 1/0067F24F 1/0063F25B 13/00F28F 2265/18F28F 2275/04F28D 1/05391F24F 1/14F25B 39/00F28F 1/32F24F 1/0059F28F 21/084
72
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Claims

Abstract

An air conditioner includes: an indoor unit including an indoor heat exchanger; and an outdoor unit including an outdoor heat exchanger. The indoor heat exchanger includes: an indoor flat tube; and an indoor fin joined to the indoor flat tube. The outdoor heat exchanger includes an outdoor flat tube; and an outdoor fin joined to the outdoor flat tube. A potential difference between the indoor fin and the indoor flat tube is smaller than a potential difference between the outdoor fin and the outdoor flat tube.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . An air conditioner comprising:
 an indoor unit comprising an indoor heat exchanger; and   an outdoor unit comprising an outdoor heat exchanger, wherein   the indoor heat exchanger comprises:
 an indoor flat tube; and 
 an indoor fin joined to the indoor flat tube, 
   the outdoor heat exchanger comprises:
 an outdoor flat tube; and 
 an outdoor fin joined to the outdoor flat tube, and 
   a potential difference between the indoor fin and the indoor flat tube is smaller than a potential difference between the outdoor fin and the outdoor flat tube.   
     
     
         2 . The air conditioner according to  claim 1 , wherein a potential of the indoor fin is higher than a potential of the outdoor fin. 
     
     
         3 . The air conditioner according to  claim 1 , wherein a potential of the indoor fin is higher than a potential of the indoor flat tube. 
     
     
         4 . The air conditioner according to  claim 1 , wherein the potential difference between the indoor fin and the indoor flat tube is not less than 20 mV and not more than 60 mV. 
     
     
         5 . The air conditioner according to  claim 1 , wherein a potential of the indoor fin with respect to a saturated calomel electrode is not less than −890 mV and not more than −750 mV. 
     
     
         6 . The air conditioner according to  claim 1 , wherein a potential of the indoor fin with respect to a saturated calomel electrode is not less than −890 mV and not more than −800 mV. 
     
     
         7 . The air conditioner according to  claim 1 , wherein the air conditioner switches between a cooling operation and a heating operation.

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