JPH02145509U - - Google Patents
Info
- Publication number
- JPH02145509U JPH02145509U JP5531889U JP5531889U JPH02145509U JP H02145509 U JPH02145509 U JP H02145509U JP 5531889 U JP5531889 U JP 5531889U JP 5531889 U JP5531889 U JP 5531889U JP H02145509 U JPH02145509 U JP H02145509U
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- evaporator
- outside air
- compressor
- detection means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims description 2
- 230000008014 freezing Effects 0.000 claims 1
- 238000007710 freezing Methods 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Air-Conditioning For Vehicles (AREA)
- Air Conditioning Control Device (AREA)
Description
第１図は、本考案にかかるエバポレータの凍結
保護装置のブロツク図であり、第２図Ａは、本考
案にかかるエバポレータの凍結保護装置の作動特
性を示す作動特性図であり、第２図Ｂは、同図Ａ
の示す作動特性におけるその制御フローチヤート
であり、第３図は、従来の低温時コンプレツサ保
護特性を示す特性図である。
１０…温度検出手段、１２…コンプレツサ制御
手段、１４…冷凍サイクル、２０…外気センサ、
２１…エバポレータセンサ、２２…オートアンプ
、２３…エアコンリレー、２４…マグネツトクラ
ツチ、２５…コンプレツサ、２６…エバポレータ
、２７…膨張弁、２８…コンデンサ。
FIG. 1 is a block diagram of the evaporator freeze protection device according to the present invention, FIG. 2A is an operation characteristic diagram showing the operation characteristics of the evaporator freeze protection device according to the present invention, and FIG. 2B is A of the same figure.
FIG. 3 is a control flow chart showing the operating characteristics shown in FIG. 3, and FIG. 3 is a characteristic diagram showing the conventional compressor protection characteristics at low temperatures. 10... Temperature detection means, 12... Compressor control means, 14... Refrigeration cycle, 20... Outside air sensor,
21... Evaporator sensor, 22... Auto amplifier, 23... Air conditioner relay, 24... Magnetic clutch, 25... Compressor, 26... Evaporator, 27... Expansion valve, 28... Capacitor.
Claims (1)
るコンプレツサ２５と、 外気温を検出する第１の温度検出手段２０と、 エバポレータ２６の直温度を検出する第２の温
度検出手段２１と、 予め、外気温に関し第１の外気設定温度ＴＡ１
とそれより温度の低い第２の外気設定温度ＴＡ２
を設定し、また、エバポレータ直温度に関して２
つのエバポレータ設定温度ＴＥ１，ＴＥ２を設定
して、前記第１の温度検出手段２０により検出さ
れた外気温が、前記第１の外気設定温度ＴＡ１以
上では常時コンプレツサ２５をオンし、前記第２
の外気設定温度ＴＡ２以下では常時コンプレツサ
２５をオフし、また、前記第１と第２の外気設定
温度ＴＡ１，ＴＡ２の間では、前記第２の温度検
出手段２１により検出されたエバポレータ直温度
と前記２つのエバポレータ設定温度ＴＥ１，ＴＥ
２の比較によつて前記コンプレツサ２５をオン・
オフ制御するコンプレツサ制御手段１２とを有し
、 これにより、エバポレータ２６の凍結防止を図
りつつ、前記エバポレータ２６の作動範囲を可及
的に拡大して外気温が低い場合にも視界を確保で
きるようにしたことを特徴とするエバポレータの
凍結保護装置。[Claims for Utility Model Registration] A compressor 25 that compresses and circulates the refrigerant in the refrigeration cycle 14, a first temperature detection means 20 that detects the outside temperature, and a second temperature detection means that detects the direct temperature of the evaporator 26. a detection means 21, and a first outside air temperature setting TA 1 regarding the outside air temperature in advance;
and a second outside air set temperature TA 2 that is lower than that temperature.
and also 2 regarding the evaporator direct temperature.
Two evaporator set temperatures TE 1 and TE 2 are set, and when the outside air temperature detected by the first temperature detection means 20 is equal to or higher than the first outside air set temperature TA 1 , the compressor 25 is always turned on and the 2
The compressor 25 is always turned off when the outside air set temperature TA 2 is below, and between the first and second outside air set temperatures TA 1 and TA 2 , the evaporator direct temperature detected by the second temperature detection means 21 is turned off. temperature and the two evaporator set temperatures TE 1 , TE
2 , the compressor 25 is turned on.
The compressor control means 12 is equipped with a compressor control means 12 that performs off-control, thereby preventing the evaporator 26 from freezing and expanding the operating range of the evaporator 26 as much as possible to ensure visibility even when the outside temperature is low. An evaporator freeze protection device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5531889U JP2500884Y2 (en) | 1989-05-16 | 1989-05-16 | Freeze protection device for evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5531889U JP2500884Y2 (en) | 1989-05-16 | 1989-05-16 | Freeze protection device for evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02145509U true JPH02145509U (en) | 1990-12-11 |
| JP2500884Y2 JP2500884Y2 (en) | 1996-06-12 |
Family
ID=31578163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5531889U Expired - Lifetime JP2500884Y2 (en) | 1989-05-16 | 1989-05-16 | Freeze protection device for evaporator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2500884Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627496A (en) * | 2014-10-29 | 2016-06-01 | 青岛海尔空调器有限总公司 | Low-temperature refrigerating control method of air conditioner and air conditioner |
-
1989
- 1989-05-16 JP JP5531889U patent/JP2500884Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2500884Y2 (en) | 1996-06-12 |
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