JPS5864436A - Defrosting control for air-cooled heat pump type air conditioner - Google Patents
Defrosting control for air-cooled heat pump type air conditionerInfo
- Publication number
- JPS5864436A JPS5864436A JP56162851A JP16285181A JPS5864436A JP S5864436 A JPS5864436 A JP S5864436A JP 56162851 A JP56162851 A JP 56162851A JP 16285181 A JP16285181 A JP 16285181A JP S5864436 A JPS5864436 A JP S5864436A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- time
- vaporization
- defrosting
- started
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は空冷ヒートポンプ式空調機の除霜制御に係り
、特に不必要な除霜を少なくさせるのく好適な除霜制御
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to defrosting control for an air-cooled heat pump type air conditioner, and particularly to defrosting control suitable for reducing unnecessary defrosting.
従来の除霜制御は空調機の運転時間を積算するタイマー
と蒸発温度を検知するサーモスタットを設け、タイマー
とサーモスタットが同時に作動した時に除霜を開始させ
ていたので着霜がない場合でも頻繁に除霜運転していた
。Conventional defrost control includes a timer that totals the operating time of the air conditioner and a thermostat that detects the evaporation temperature. Defrosting is started when the timer and thermostat operate at the same time, so defrosting is performed frequently even when there is no frost formation. It was frost driving.
この発明は上述の事柄にもとずきなされたもの。This invention was made based on the above-mentioned matters.
で、除ｌＩが必要な時にだけ除霜運転するように制御さ
せることを目的としたものである。The purpose of this is to control the defrosting operation so that the defrosting operation is performed only when the defrosting operation is necessary.
仁の発明の特徴とするところは一定時間当りの蒸発温度
または蒸発圧力の低下度合あるいは蒸発温度が一定値に
なる時間を積算し、その低下度合が一定値以上になった
時あるいは積算時間が一定時間になった時にｋｎを開始
させるようにしたため、着霜がない場合、すなわち、蒸
発温度または蒸発圧力が一定の場合には除霜に入らない
ようにした、また蒸発温度が一定値以下になる時間の積
算方式としたので、外気温度の変動による影響を受けず
、サーモスタットの設定値を低くできる。Jin's invention is characterized by integrating the degree of decrease in evaporation temperature or evaporation pressure over a certain period of time, or the time during which the evaporation temperature reaches a constant value, and when the degree of decrease exceeds a certain value or the accumulated time is constant. Since kn is started when the time is reached, defrosting is not started if there is no frost formation, that is, if the evaporation temperature or evaporation pressure is constant, or if the evaporation temperature is below a certain value. Since it uses a time integration method, it is not affected by fluctuations in outside temperature and can lower the thermostat setting.
以下、この発明の一実施例を第１図乃至第３図に従って
さらに具体的にＲ明する。第１図は外気温度と室内温度
が一定の条件において着霜がある場合Ａと着霜がない場
合Ｂの蒸発温度の変化を示す。着霜がある場合は着霜す
ることによシ室外熱交換器の能力が低下するため時間と
ともに蒸発温度が低下する。さら罠、着霜すると時間と
ともに一定時間車シの蒸発温度低下度合は大きくなって
いく。また、着霜がない鳴合すは蒸発圧力は一定である
。Hereinafter, one embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 3. FIG. 1 shows changes in evaporation temperature in A case where there is frost formation and B when there is no frost formation under conditions where the outside air temperature and the indoor temperature are constant. If there is frost, the capacity of the outdoor heat exchanger decreases due to frost, and the evaporation temperature decreases over time. Moreover, when frost forms, the degree of decrease in the evaporation temperature of the vehicle increases over time. In addition, the evaporation pressure is constant when there is no frost formation.
第２図は外気温度と室内温度が一定の条件において着霜
がある場合とない場合の一定時間当シの蒸発温度低下度
合の変化を示す。したがって、蒸発温度低下度合の設定
を０点とすると、着霜がない場合は除霜に入ることはな
く、除霜が必要な場合には確実に除霜指令を出すことが
できる。FIG. 2 shows changes in the degree of decrease in evaporation temperature over a certain period of time with and without frost formation under conditions where the outside air temperature and the indoor temperature are constant. Therefore, if the evaporation temperature reduction degree is set to 0, defrosting will not begin if there is no frost, and if defrosting is required, a defrosting command can be reliably issued.
第３図は外気温度と室内温度が一定の条件において着霜
がある場合の蒸発温度Ａと着霜がない場合の蒸発温度Ｂ
の変化を示す。着霜がある場合Ａは着霜することによシ
室外熱交換器の能力が低下するため時間とともに蒸発温
度が低下する。まえ、着霜がない場合Ｂは蒸発温度は一
定である。ここで、蒸発温度は外気温度の変動を受けや
すいため、一時的に外気温度が上昇した場合を考慮する
と、従来の除霜制御の場合除霜が必要な時に除霜に入ら
ない事があるためサーモスタットの設定値を高くしなけ
ればならなかったが、蒸発温度が一定値以下になる時間
の積算方式としたため、外気温度の変動による影響がな
いのでサーモスタットの設定値を低くできる。Figure 3 shows evaporation temperature A when there is frost formation and evaporation temperature B when there is no frost formation under conditions where the outside air temperature and indoor temperature are constant.
shows the change in When there is frost formation, the capacity of the outdoor heat exchanger decreases due to frost formation, so the evaporation temperature decreases over time. First, when there is no frost, the evaporation temperature is constant in case B. Here, the evaporation temperature is susceptible to fluctuations in the outside air temperature, so if we consider the case where the outside air temperature temporarily rises, with conventional defrosting control, defrosting may not start when defrosting is required. The thermostat setting value had to be set high, but since the system uses a method that integrates the time during which the evaporation temperature falls below a certain value, it is not affected by outside temperature fluctuations, so the thermostat setting value can be lowered.
以上、本発ＦＩＡＫよれば着霜がない場合の除霜をなく
すことができる。As described above, according to the present FIAK, defrosting when there is no frost can be eliminated.
第１図、第２図は外気温度と室内温度が一定の条件下に
おける着霜がある場合とない場合の蒸発温度および蒸発
温度の低下度合の変化を示す本発明説明図、第３図は外
気温度と室内温度が一定の条件下における着−がある場
合とない場合の蒸発温度の変化を示す本発明説明図であ
る。
ム・・・着霜がある場合 Ｂ−・・着霜がない場合 Ｃ
・・・設定値
代理人 弁理士 薄川牙トｔFigures 1 and 2 are explanatory diagrams of the present invention showing changes in evaporation temperature and the degree of decrease in evaporation temperature with and without frost formation under conditions where the outside air temperature and indoor temperature are constant, and Figure 3 is an illustration of the outside air temperature. FIG. 3 is an explanatory diagram of the present invention showing changes in evaporation temperature with and without deposition under conditions of constant temperature and room temperature. M...When there is frost B-...When there is no frost C
...Setting value agent Patent attorney Kito Usukawa
Claims (1)
時間当りの蒸発温度または蒸発圧力の低下度合あるいは
蒸発温度が一定値になる時間を積算し、低下度合が一定
値以上になった時あるいは積算時間が一定時間になった
時に除霜を開始させるようにしたことを特徴とする空冷
ヒートポンプ式空調機の除霜制御。In an air-cooled heat pump type air conditioner, during heating operation, the degree of decrease in evaporation temperature or evaporation pressure per a certain period of time, or the time for which the evaporation temperature reaches a constant value, is integrated, and when the degree of decrease exceeds a certain value or the accumulated time Defrosting control for an air-cooled heat pump type air conditioner, characterized in that defrosting is started when a certain period of time has elapsed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56162851A JPS5864436A (en) | 1981-10-14 | 1981-10-14 | Defrosting control for air-cooled heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56162851A JPS5864436A (en) | 1981-10-14 | 1981-10-14 | Defrosting control for air-cooled heat pump type air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5864436A true JPS5864436A (en) | 1983-04-16 |
Family
ID=15762444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56162851A Pending JPS5864436A (en) | 1981-10-14 | 1981-10-14 | Defrosting control for air-cooled heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5864436A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6159137A (en) * | 1984-08-28 | 1986-03-26 | Sanyo Electric Co Ltd | Frosting detection method |
| WO2019111405A1 (en) * | 2017-12-08 | 2019-06-13 | 三菱電機株式会社 | Air conditioner |
| CN111879056A (en) * | 2020-06-11 | 2020-11-03 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device, storage medium and refrigerator |
-
1981
- 1981-10-14 JP JP56162851A patent/JPS5864436A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6159137A (en) * | 1984-08-28 | 1986-03-26 | Sanyo Electric Co Ltd | Frosting detection method |
| WO2019111405A1 (en) * | 2017-12-08 | 2019-06-13 | 三菱電機株式会社 | Air conditioner |
| JPWO2019111405A1 (en) * | 2017-12-08 | 2020-07-09 | 三菱電機株式会社 | Air conditioner |
| CN111879056A (en) * | 2020-06-11 | 2020-11-03 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device, storage medium and refrigerator |
| CN111879056B (en) * | 2020-06-11 | 2021-09-07 | 珠海格力电器股份有限公司 | Refrigerator defrosting control method and device, storage medium and refrigerator |
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