Functions and Control
Domestic air conditioner
7.2 Value of thermistor
Room sensor and Pipe Sensor
Room sensor
R25
℃
=23K
Ω
±
2%
B25
℃
/50
℃
=4200K
±
1%
R25
℃
=23K
Ω
+2%
Temp.(
℃
)
Resistor
（
K
Ω
）
Temp.
（℃）
Resistor
（
K
Ω
）
Temp.
（℃）
Resistor
（
K
Ω
）
-20
266.905
18
32.215
56
6.1
-19
250.866
19
30.671
57
5.87
-18
235.895
20
29.21
58
5.65
-17
221.911
21
27.828
59
5.44
-16
208.838
22
26.521
60
5.24
-15
196.609
23
25.283
61
5.04
-14
185.163
24
24.111
62
4.86
-13
174.443
25
23
63
4.68
-12
164.399
26
21.94
64
4.51
-11
154.983
27
20.94
65
4.35
-10
146.153
28
19.99
66
4.19
-9
137.87
29
19.09
67
4.04
-8
130.096
30
18.23
68
3.9
-7
122.799
31
17.42
69
3.76
-6
115.946
32
16.65
70
3.63
-5
109.51
33
15.97
71
3.5
-4
103.462
34
15.22
72
3.38
-3
97.779
35
14.56
73
3.26
-2
92.437
36
13.93
74
3.15
-1
87.415
37
13.34
75
3.04
0
82.691
38
12.77
76
2.94
1
78.248
39
12.23
77
2.84
2
74.067
40
11.71
78
2.74
3
70.133
41
11.22
79
2.65
4
66.43
42
10.76
80
2.56
5
62.943
43
10.31
6
59.659
44
9.89
7
56.566
45
9.49
8
53.651
46
8.1
9
50.904
47
8.74
10
48.314
48
8.39
11
45.872
49
8.05
12
43.569
50
7.73
13
41.395
51
7.43
20
