JPS6365244A - Controller for air-conditioning machine - Google Patents
Controller for air-conditioning machineInfo
- Publication number
- JPS6365244A JPS6365244A JP61209925A JP20992586A JPS6365244A JP S6365244 A JPS6365244 A JP S6365244A JP 61209925 A JP61209925 A JP 61209925A JP 20992586 A JP20992586 A JP 20992586A JP S6365244 A JPS6365244 A JP S6365244A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- signal
- predetermined value
- timer
- time
- 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
- 238000004378 air conditioning Methods 0.000 title description 3
- 238000010257 thawing Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 28
- 230000001186 cumulative effect Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 abstract description 16
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は空気調和機の制御装置に関するもので特にその
除霜制御に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for an air conditioner, and in particular to defrosting control thereof.
従来の技術
2べ−7
従来より冷暖房可能な空気調和機における暖房運転時の
室外熱交換器への着霜による暖房能力の低下を防ぐため
除霜制御がなされているが、より快適な空気調和として
除霜制御の最適化が要求されている。Conventional technology 2B-7 Conventionally, defrosting control has been performed to prevent reduction in heating capacity due to frost formation on the outdoor heat exchanger during heating operation in air conditioners capable of cooling and heating. Therefore, optimization of defrost control is required.
以下図面を参照しながら、上述した従来の空気調和機の
制御装置について説明する。The conventional air conditioner control device described above will be described below with reference to the drawings.
第4図は、従来よシ用いられている一般的な空気調和機
の冷凍システム図である。FIG. 4 is a diagram of a refrigeration system of a conventionally used general air conditioner.
第4図において、1は圧縮機、2は四方弁、3は室内熱
交換器、4は絞り弁、6は室外熱交換器であり順次連通
して冷凍サイクルを構成し、」−配回方弁2で冷媒の流
れ方向を選択的に切換えることによシ、暖房あるいは冷
房運転を行なうようになっている。図中矢印−は暖房、
・・・−は冷房時の冷媒の流れを示す。In Fig. 4, 1 is a compressor, 2 is a four-way valve, 3 is an indoor heat exchanger, 4 is a throttle valve, and 6 is an outdoor heat exchanger, which are connected in sequence to form a refrigeration cycle. By selectively switching the flow direction of the refrigerant with the valve 2, heating or cooling operation is performed. The arrow - in the figure indicates heating;
...- indicates the flow of refrigerant during cooling.
このような空気調和機におい又、暖房運転時、蒸発器と
なる室外熱交換器5に鞘が付着し凍結する場合がある。In addition, in such an air conditioner, during heating operation, the outdoor heat exchanger 5, which serves as an evaporator, may have a sheath attached to it and freeze.
このため、一般には圧縮機1の運転積算時間が所定時間
に達し、かつ空外熱交換器3 へ−7
6の温度が所定値以下になると、霜が付着したと見なし
除霜信号を出力し、この除霜信号で四方弁2を切換える
ことによシ、冷房ザイクルにして高温ガスにて室外熱交
換器6に付着した霜を除去し、それが終了すると室外熱
交換器6の温度が所定値以上になることにより、除霜終
了信号を出力し四方弁2を切換え、暖房サイクルに戻し
暖房運転を行なわせるものである。For this reason, generally, when the cumulative operating time of the compressor 1 reaches a predetermined time and the temperature of the air-to-air heat exchanger 3-76 falls below a predetermined value, it is assumed that frost has formed and a defrost signal is output. By switching the four-way valve 2 in response to this defrosting signal, the frost adhering to the outdoor heat exchanger 6 is removed using high-temperature gas in a cooling cycle, and when this is completed, the temperature of the outdoor heat exchanger 6 is set to a predetermined level. When the temperature exceeds the value, a defrosting end signal is output, the four-way valve 2 is switched, and the heating cycle is returned to the heating operation.
発明が解決しようとする問題点
しかしながら上記のような構成では、以下の問題があっ
た。すなわち、外気条件が高湿時、室外熱交換器5への
霜の付着スピードが速く、短時間で室外熱交換器5の温
度は所定値以下になるが圧縮機1の運転積算時間が所定
値に達しないため除霜が遅れ、そのため暖房能力が極端
に低下し、快適な空気調和ができないという欠点を有し
ていた。Problems to be Solved by the Invention However, the above configuration has the following problems. That is, when the outside air condition is high humidity, the speed at which frost adheres to the outdoor heat exchanger 5 is fast, and the temperature of the outdoor heat exchanger 5 falls below a predetermined value in a short time, but the cumulative operating time of the compressor 1 does not exceed the predetermined value. Defrosting is delayed because the temperature is not reached, resulting in an extremely low heating capacity, which has the drawback of not being able to provide comfortable air conditioning.
問題点を解決するだめの手段
上記問題点を解決するため本発明の空気調和機の制御装
置は、圧縮機の運転時間を積算する第1タイマと暖房時
蒸発器となる室外熱交換器の温度を検出する第1温度検
出回路と、この第1温度検出回路の出力に応動し前記蒸
発器が1y1定温度以−1・になった時その継続時間を
活勢する第2タイマと、外気温度を検出する第2温度検
出回路と、前記第1タイマの積算時間が所定値に達し、
かつ前記蒸発器が所定温度以下になるが、又は前記第2
タイマの積算時間が所定値に達し、かつ前記外気?i、
a7Jlが所定値以上の時、前記蒸発器に対する除11
1を開始する手段をa#えたものである1゜
作 用
本発明は上記した構成によって、室外熱交換器への着霜
スピードが速い時は圧縮機の運転積3i: ns7間が
所定値に達するのを待たずに除1iを行なうことになる
。Means for Solving the Problems In order to solve the above problems, the air conditioner control device of the present invention has a first timer that integrates the operating time of the compressor and a temperature of the outdoor heat exchanger that serves as the evaporator during heating. a first temperature detection circuit that detects the outside air temperature; a second temperature detection circuit that detects
and the temperature of the evaporator is below a predetermined temperature, or the second
The cumulative time of the timer reaches a predetermined value, and the outside air? i,
When a7Jl is greater than a predetermined value, the ratio 11 to the evaporator is
The present invention has the above-described configuration, so that when the speed of frost formation on the outdoor heat exchanger is fast, the operating product of the compressor between 3i and ns7 reaches a predetermined value. Dividing 1i is performed without waiting for the arrival of the value.
実施例
以下本発明の一実施例の制御装置について、第1図から
第3図を参照しながら説明する。、冷凍ヤイクルの一般
的動作は従来例と同じであり省略する。壕だ、従来例と
同一のものについては同一の符号を記して説明する。Embodiment Below, a control device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. The general operation of the refrigeration cycle is the same as that of the conventional example, and will therefore be omitted. Components that are the same as those in the conventional example will be described using the same reference numerals.
5 ベーン
M1図において、6は圧縮機1の運転信号を発生する圧
縮機運転信号発生回路、7は圧縮機運転信号を受けて運
転時間の積算を行なう第1タイマで所定値に達すると出
力してハイレベル信号(以下H信号と略す)を出力する
。8は蒸発器となる室外熱交換器5に取付けられたM1
温度検出素子、9は温度検出素子8の出力を入力とし案
外熱交換器5の温度を検出する第1温度検出回路で、所
定値以下になるとH信号を出力する。1oは第1温度検
出回路9の出力を入力とじ、第1温度検出回路9の出力
がH信号即ち室外熱交換器5の温度が所定値以下になっ
た時の時間を積算する第2タイマで、所定値に達すると
H信号を出力する。11は前記第1タイマ7の出力信号
と前記第1温度検出回路9の出力信号を入力とし、この
内入力が共にH信号の時のみ出力としてH信号を出力す
るAND回路、12は前記AND回路11の出力信号を
セット端子Sの入力とするフリップ70ツブ(F、F)
、13は室外熱交換器5の外気温度を検出する第2温度
検出素子、14は第2温度検出素子13を人力とし外気
温度を検出する第2温度検出回路で所定値以上になると
H(rj9を出力する3、15は前記第2タイマ1oの
出カ信すと前記第2温度検出回路14の出カ信ぢを入力
とし、この内入力が共にH信号の時のみ出力とじてH信
−弓を出力するAND回路、16は前記F、F12の出
力信号とAND回路15の出力信号を入力とし、どちら
か一方又は両方共H信号の1時出力とじてH(i’?
−@を出力するOR回路、17はリレー18を駆動する
ドライバでリレー18の接点18aを介し、四方弁2は
電源19に接続している1、2oは前記第1温度検出素
子8を入力とじ室外熱交換器6の温度が所定値以上にな
るとり士ソト信号を出力するリセット信号で、リセット
信号は前記第1タイマ7、第2タイマ1o及びF、F1
2のリセット端子Rに入力され各タイマ及びF、F12
をり七〕卜する。5 In the vane M1 diagram, 6 is a compressor operation signal generation circuit that generates an operation signal for the compressor 1, and 7 is a first timer that receives the compressor operation signal and totalizes the operating time, which outputs an output when a predetermined value is reached. outputs a high level signal (hereinafter abbreviated as H signal). 8 is M1 attached to the outdoor heat exchanger 5 which serves as an evaporator.
A temperature detection element 9 is a first temperature detection circuit which receives the output of the temperature detection element 8 as input and detects the temperature of the unexpected heat exchanger 5, and outputs an H signal when the temperature falls below a predetermined value. 1o is a second timer which inputs the output of the first temperature detection circuit 9 and integrates the time when the output of the first temperature detection circuit 9 becomes an H signal, that is, the temperature of the outdoor heat exchanger 5 becomes below a predetermined value. , outputs an H signal when it reaches a predetermined value. 11 is an AND circuit which receives the output signal of the first timer 7 and the output signal of the first temperature detection circuit 9, and outputs an H signal only when both inputs are H signals, and 12 is the AND circuit. Flip 70 tube (F, F) that inputs the output signal of 11 to the set terminal S
, 13 is a second temperature detection element that detects the outside air temperature of the outdoor heat exchanger 5, and 14 is a second temperature detection circuit that uses the second temperature detection element 13 manually to detect the outside air temperature. The output signals 3 and 15 receive the output signal of the second temperature detection circuit 14 when the output of the second timer 1o is received, and output the H signal only when both inputs are H signals. The AND circuit 16 that outputs the bow inputs the output signals of F and F12 and the output signal of the AND circuit 15, and outputs H (i'?
17 is a driver that drives the relay 18, and the four-way valve 2 is connected to the power supply 19. 1 and 2o are the input terminals for the first temperature detection element 8. A reset signal that outputs a control signal when the temperature of the outdoor heat exchanger 6 exceeds a predetermined value, and the reset signal is the first timer 7, the second timer 1o, F, F1.
It is input to the reset terminal R of 2 and each timer and F, F12.
7.
、以上のような構成において以下第2図及び第3−゛の
タイムチャートにて動作を説明する。第2図ニー
ハ着霜スピードが緩慢な場合の除霜パターンテあ7 ペ
ージ
リ、圧縮機運転信号発生回路6からの圧縮機運転信号(
H信号)を第1タイマ7にて積算しT1の時点で所定値
に達すると第1タイマ7はH信号を継続して出力する。The operation of the above configuration will be explained below with reference to the time charts of FIG. 2 and FIG. 3-2. Fig. 2 Defrosting pattern when the frosting speed is slow Tea 7 Pagely, compressor operation signal from the compressor operation signal generation circuit 6 (
H signal) is integrated by the first timer 7, and when it reaches a predetermined value at time T1, the first timer 7 continues to output the H signal.
その後、室外熱交換器5への着霜が進み温度が低下しT
2の時点で所定温度(例えば−5°C)に達すると第1
温度検出回路9はH信号を出力する。第1タイマ7の出
力信号と第1温度検出回路゛9の出力信号を入力とする
AND回路11は両人力が共にH信号のため出力として
H信号を出力し、AND回路11の出力信号をセット入
力とするF、F12はH信号を出力する。F、F12の
H信号出力は○R回路16を介しドライノく17により
リレー18をOFFさせるため四方弁2は電源19から
の励磁がなくな9OFFする。After that, frost builds up on the outdoor heat exchanger 5 and the temperature decreases.
When the predetermined temperature (e.g. -5°C) is reached at point 2, the first
Temperature detection circuit 9 outputs an H signal. The AND circuit 11 which inputs the output signal of the first timer 7 and the output signal of the first temperature detection circuit 9 outputs an H signal as an output since both signals are H, and sets the output signal of the AND circuit 11. The input F and F12 output an H signal. The H signal output from F and F12 is passed through the R circuit 16 to turn off the relay 18 by the dry nozzle 17, so the four-way valve 2 is no longer energized by the power source 19 and is turned off.
四方弁2のOFFによシ冷媒の流れが逆となシ高温ガス
により室外熱交換器5は除霜される。室外熱交換器5の
温度が上昇し除霜終了と見なされる所定温度(例えば1
0′C)に達するT3の時点で”’、、H:’j、’、
+ y ) lEj]@ 2 oヵ8□□カカ1、□、
2イー′]イ′及びF、F12をリ−k 、)−) L
、四方弁、はONとなり暖房モードに復帰する。When the four-way valve 2 is turned off, the flow of the refrigerant is reversed, and the outdoor heat exchanger 5 is defrosted by the high-temperature gas. The temperature of the outdoor heat exchanger 5 rises to a predetermined temperature (for example, 1
At the time of T3 when reaching 0'C), "',, H:'j,',
+ y) lEj] @ 2 oka8□□kaka1, □,
2E′]I′ and F, F12 as Lee-k,)-) L
, four-way valve, is turned on and returns to heating mode.
第3図は外気が高湿のため着霜スピードが速い場合の除
霜パターンで、前述の如く第1タイマ7は圧縮機1の運
転時間を積算する訳であるが、着霜スピードが速く圧縮
機運転積算時間が所定値に達する以前のT1′の時点で
室外熱交換器6の温度が所定値以下となり、第1温度検
出回路9はH信号を出力し、第2タイマ10はH信号の
継続時間を積算する。T2′の時点で、積算時間部’(
tl +t、 2 )が所定値に達すると第2タイマ1
oはH信号を出力する。又、外気温が所定値以上の時は
第2温度検出回路14はH信号を出力する。第2タイマ
10の出力信号と第2温度検出回路14の出力信号が共
にH信号のため、この二つの信号を入力とするAND回
路16は出力としてH信号を出力する。Figure 3 shows a defrosting pattern when the outside air is highly humid and the frosting speed is fast.As mentioned above, the first timer 7 integrates the operating time of the compressor 1, but when the frosting speed is fast and the At time T1' before the accumulated machine operation time reaches the predetermined value, the temperature of the outdoor heat exchanger 6 becomes below the predetermined value, the first temperature detection circuit 9 outputs the H signal, and the second timer 10 outputs the H signal. Accumulate the duration. At the time of T2', the cumulative time part'(
tl +t, 2) reaches a predetermined value, the second timer 1
o outputs an H signal. Further, when the outside temperature is above a predetermined value, the second temperature detection circuit 14 outputs an H signal. Since both the output signal of the second timer 10 and the output signal of the second temperature detection circuit 14 are H signals, the AND circuit 16 which receives these two signals as input outputs an H signal as an output.
AND回路15の出力は前述と同様OR回路16を介し
ドライバ17によシリレー18をOFFさせるため、四
方弁2はOFFし除霜を開始する。The output of the AND circuit 15 is transmitted through the OR circuit 16 to the driver 17 to turn off the syringe relay 18 as described above, so the four-way valve 2 is turned off and defrosting is started.
除霜が終了し温度が上昇するT3′の時点で前記と同様
、リセット回路20はH信号を出力し、第29 ページ
タイマ1oをリセットすることで四方弁2をONする。At time T3' when defrosting is finished and the temperature rises, the reset circuit 20 outputs an H signal, and the four-way valve 2 is turned on by resetting the 29th page timer 1o, as described above.
従って除霜は終了し、暖房モードに復帰する。外気温が
所定値以下の時は第2温度検出回路14はH信号を出力
することはないので前述した様に除霜に入ることはない
。これは、外気温が所定値以下の時に第1温度検出素子
8が、外気温を検出し、その結果第1温度検出回路9が
H信号を出力し除霜に入るいわゆる空除霜を防止する。Therefore, defrosting ends and the heating mode returns. When the outside temperature is below a predetermined value, the second temperature detection circuit 14 does not output an H signal, so defrosting does not begin as described above. This is because the first temperature detection element 8 detects the outside temperature when the outside temperature is below a predetermined value, and as a result, the first temperature detection circuit 9 outputs an H signal to start defrosting, preventing so-called air defrosting. .
従って、高湿外気条件時に於いて圧縮機運転積算時間が
所定値に達する以前に室外熱交換器に着霜が進み室外熱
交換器温度が低下すれば、所定温度以下の時間を積算し
、その積算時間が所定値に達すると圧縮機運転時間が所
定値に達せずとも除霜するため、従来のように除霜タイ
ミングが遅れ暖房能力が低下し、空調の快適性が損われ
るという問題を解消することができる。Therefore, if frost builds up on the outdoor heat exchanger and the temperature of the outdoor heat exchanger decreases before the accumulated operating time of the compressor reaches the predetermined value under high humidity outdoor air conditions, the time when the temperature is below the predetermined temperature is accumulated and the When the cumulative time reaches a predetermined value, defrosting occurs even if the compressor operating time does not reach the predetermined value, eliminating the conventional problem of delayed defrost timing and reduced heating capacity, which impairs the comfort of air conditioning. can do.
発明の効果
以上のように本発明は、圧縮機の運転時間を積算する第
1タイマと、暖房時蒸発器となる室外熱交換器の温度を
検出する第1温度検出回路と、こ10べ−7
の第1温度検出回路の出力に応動し前記蒸発器が所定温
度以下になった時その継続時間を積算する第2タイマと
、外気温度を検出する第2温度検出回路と前記第1タイ
マの積算時間が所定値に達し、かつ前記蒸発器が所定温
度以下に達した時以外に、前記第2タイマの積算時間が
所定値に達し、かつ前記外気温度が所定値以上の時に除
霜を開始させる手段を設けたものであるため、高湿外気
条件時、室外熱交換器への着霜スピードが速く、室外熱
交換器が着霜し除霜すべき時は圧縮機運転積算時間が所
定値に達せずとも除霜されるため、適正な除霜タイミン
グで除霜される。従って、従来のような除霜が遅れ暖房
能力が低下するといった問題がないものである。Effects of the Invention As described above, the present invention includes a first timer that integrates the operating time of the compressor, a first temperature detection circuit that detects the temperature of the outdoor heat exchanger that serves as the evaporator during heating, and the like. 7. A second timer that responds to the output of the first temperature detection circuit and integrates the duration when the temperature of the evaporator becomes below a predetermined temperature, a second temperature detection circuit that detects the outside air temperature, and the first timer. Defrosting is started when the cumulative time of the second timer reaches a predetermined value and the outside air temperature is above a predetermined value, other than when the cumulative time reaches a predetermined value and the temperature of the evaporator reaches a predetermined value or lower. Since the compressor is equipped with a means for defrosting, the speed of frost formation on the outdoor heat exchanger is fast under high humidity outside air conditions, and when the outdoor heat exchanger is frosted and needs to be defrosted, the accumulated operating time of the compressor is reduced to a predetermined value. Since defrosting is performed even before the defrost temperature reaches the desired temperature, defrosting is performed at the appropriate defrosting timing. Therefore, there is no problem that defrosting is delayed and the heating capacity is reduced as in the conventional case.
第1図は本発明の一実施例を示す空気調和機の制御装置
の回路ブロック図、第2図、第3図は上記制御装置の動
作を示すタイ広チャート図、第4図は従来の空気調和機
の冷凍システム、図である。
1・・・・・・圧縮機、7・・・・・・第1タイマ、9
・・・・・・第111べ一−ノ′
温度検出回路、10・・・・第2タイマ、14・・・・
・・第2温度検出回路。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名第
2 図
第3図
第4図Fig. 1 is a circuit block diagram of a control device for an air conditioner showing an embodiment of the present invention, Figs. 2 and 3 are wide chart diagrams showing the operation of the above control device, and Fig. 4 is a conventional air conditioner This is a diagram of the refrigeration system of the conditioner. 1... Compressor, 7... First timer, 9
...111th bench temperature detection circuit, 10...2nd timer, 14...
...Second temperature detection circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person
2 Figure 3 Figure 4
Claims (1)
度を検出する第1温度検出回路と、この第1温度検出回
路の出力に応動し前記蒸発器が所定温度以下になった時
その継続時間を積算する第2タイマと、外気温度を検出
する第2温度検出回路と、前記第1タイマの積算時間が
所定値に達し、かつ前記蒸発器が所定温度以下になるか
、又は前記第2タイマの積算時間が所定値に達し、かつ
前記外気温度が所定値以上の時、前記蒸発器に対する除
霜を開始する手段を具備したことを特徴とする空気調和
機の制御装置。a first timer for integrating the operating time of the compressor; a first temperature detection circuit for detecting the temperature of the evaporator; a second timer that integrates the duration; a second temperature detection circuit that detects the outside air temperature; A control device for an air conditioner, comprising means for starting defrosting of the evaporator when the cumulative time of two timers reaches a predetermined value and the outside air temperature is equal to or higher than a predetermined value.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61209925A JPS6365244A (en) | 1986-09-05 | 1986-09-05 | Controller for air-conditioning machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61209925A JPS6365244A (en) | 1986-09-05 | 1986-09-05 | Controller for air-conditioning machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6365244A true JPS6365244A (en) | 1988-03-23 |
Family
ID=16580932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61209925A Pending JPS6365244A (en) | 1986-09-05 | 1986-09-05 | Controller for air-conditioning machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6365244A (en) |
-
1986
- 1986-09-05 JP JP61209925A patent/JPS6365244A/en active Pending
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