JPH01169284A - Freezing prevention device for air conditioner - Google Patents
Freezing prevention device for air conditionerInfo
- Publication number
- JPH01169284A JPH01169284A JP62328542A JP32854287A JPH01169284A JP H01169284 A JPH01169284 A JP H01169284A JP 62328542 A JP62328542 A JP 62328542A JP 32854287 A JP32854287 A JP 32854287A JP H01169284 A JPH01169284 A JP H01169284A
- Authority
- JP
- Japan
- Prior art keywords
- way valve
- signal
- defrosting
- heat exchanger
- outdoor
- 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
- 238000007710 freezing Methods 0.000 title abstract description 13
- 230000008014 freezing Effects 0.000 title abstract description 10
- 230000002265 prevention Effects 0.000 title abstract description 7
- 238000010257 thawing Methods 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 230000002528 anti-freeze Effects 0.000 claims description 15
- 239000003507 refrigerant Substances 0.000 claims description 15
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 5
- 108010053481 Antifreeze Proteins Proteins 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000252233 Cyprinus carpio Species 0.000 description 1
- 241000287462 Phalacrocorax carbo Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
詳しくは暖房低外気温時の室外凍結防止および除霜時の
四方弁力シ換え音対策に関するものである。DETAILED DESCRIPTION OF THE INVENTION In detail, the present invention relates to prevention of outdoor freezing during heating and low outdoor temperatures, and countermeasures against four-way valve power switching noise during defrosting.
従来の技術
従来の室外熱交換器と基板の間での凍結防止においては
、熱交換器の冷媒の流し方を変えたり、室内熱交換器の
出口から凍結防止管を連結して室外熱交換器の下に通す
等の構成になっている。Conventional technology In order to prevent freezing between an outdoor heat exchanger and a board, it is possible to change the way the refrigerant flows through the heat exchanger, or connect an antifreeze pipe from the outlet of the indoor heat exchanger to prevent freezing between the outdoor heat exchanger and the board. The structure is such that it can be passed under the.
以下、第５図、第６図を参照しながら、従来の凍結防止
方法の一例について説明する。An example of a conventional freeze prevention method will be described below with reference to FIGS. 5 and 6.
第５図は従来の室外熱交換器の冷媒の流し方での凍結防
止方法、第６図は凍結防止管を使用した冷凍サイクル図
を示す。FIG. 5 shows a conventional freezing prevention method using a refrigerant flow method in an outdoor heat exchanger, and FIG. 6 shows a refrigeration cycle diagram using a freezing prevention tube.
第５図は、逆サイクル方式で除霜を行う空冷式と一トボ
ンブの室外熱交換器において、除霜運転時インバータ式
圧縮機から吐出される高圧過熱ガスを室外熱交換器１０
１のそれぞれの冷媒流路入口へ送る配管１０２の少なく
とも一部が室外熱交換器１０１の最下部１０３の流路へ
接合されている。（実公昭５５−１４９１５２号公報）
第第６図は、圧縮機１０４、四方弁１０５、室内熱交換
器１０６、凍結防止管１０７、絞り装置１０８、室外熱
交換器１０９を環状に配管で連結して冷凍サイクルを構
成し、暖房運転時は常時凍結防止管１０７に冷媒が流れ
ている。FIG. 5 shows an air-cooled and one-bomber outdoor heat exchanger that performs defrosting using a reverse cycle method.
At least a part of the piping 102 that feeds the refrigerant to the inlet of each refrigerant flow path of the outdoor heat exchanger 101 is connected to a flow path at the lowest part 103 of the outdoor heat exchanger 101 . (Utility Model Publication No. 55-149152)
FIG. 6 shows a refrigeration cycle in which a compressor 104, a four-way valve 105, an indoor heat exchanger 106, an anti-freezing pipe 107, a throttling device 108, and an outdoor heat exchanger 109 are connected in a ring with piping, and heating operation is performed. Refrigerant is constantly flowing through the antifreeze pipe 107.
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、以下のような問題
があった。Problems to be Solved by the Invention However, the above configuration has the following problems.
第５図では、室外熱交換器１０１が傾斜した構造体にお
いては、基板との接触面積が少ないために除霜時の高温
高圧の冷媒の熱が基板に伝わり鷺く木が成長してし１う
。また除霜時に逆サイクルするため四方弁の切り換え時
に音および振動が生じてくる。In FIG. 5, in a structure in which the outdoor heat exchanger 101 is tilted, the contact area with the substrate is small, so the heat of the high-temperature, high-pressure refrigerant during defrosting is transmitted to the substrate, causing the growth of a heron tree. cormorant. In addition, since the cycle is reversed during defrosting, noise and vibration are generated when the four-way valve is switched.
第６図では、暖房運転時に常に凍結防止管１０７を冷媒
が流れるため、冷媒が過冷却になって暖房能力の低下が
ある。また室外熱交換器１０９の長さが長くなればなる
ほどその低下は増加する方向となる。In FIG. 6, since the refrigerant always flows through the antifreeze tube 107 during heating operation, the refrigerant becomes supercooled and the heating capacity is reduced. Moreover, the longer the length of the outdoor heat exchanger 109, the more the decrease will increase.
本発明は上記問題点に鑑み、暖房運転時の暖房能力の低
下をなりシ、室外熱交換器と基板の間および室外熱交換
器から〜すれた位置のドレン処理穴の凍結を防止するこ
とや、除霜の開始と終了時の四方弁切り換え音を解消す
ることを目的とするものである。In view of the above-mentioned problems, the present invention prevents the heating capacity from decreasing during heating operation, and prevents freezing of the drain hole between the outdoor heat exchanger and the board and at a position away from the outdoor heat exchanger. The purpose is to eliminate the four-way valve switching noise at the start and end of defrosting.
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に本発明の空気調和機の凍結
防止装置は、インバータ式圧縮機、四方弁、室内熱交換
器、第１の絞り装置、第２の絞り装置、室外熱交換器、
アキュームレータを順次環状に配管で連結して冷凍サイ
クルを構成し、第１の絞り装置と第２の絞り装置の間に
、常に高温高圧冷媒が通る吐出配管から二方弁と凍結防
止管を具備したバイパス回路を設け、さらに除霜運転の
開始と終了の検知を行う除霜検知手段と、この除霜検知
手段の出力により前記インバータ式圧縮機、四方弁、二
方弁の作動を制御する手段を具備し、除霜開始信号を受
けることにより、前記インバータ式圧縮機の運転周波数
を低周波数に落とし、また二方弁を開放状態にして、四
方弁を切り換えて除霜運転を行い、除霜検知手段から除
霜終了信号を受けると前記インバータ式圧縮機を停止し
、二方弁を閉状態にし、四方弁を切り換えて暖房運転を
行うように構成したものである。Means for Solving the Problems In order to solve the above problems, the anti-freezing device for an air conditioner of the present invention includes an inverter compressor, a four-way valve, an indoor heat exchanger, a first throttling device, a second Throttle device, outdoor heat exchanger,
A refrigeration cycle is constructed by sequentially connecting the accumulators in a ring with piping, and a two-way valve and antifreeze pipe are provided between the first throttle device and the second throttle device from the discharge pipe through which high-temperature, high-pressure refrigerant always passes. A bypass circuit is provided, and a defrosting detection means for detecting the start and end of defrosting operation, and means for controlling the operation of the inverter compressor, four-way valve, and two-way valve based on the output of the defrosting detection means are provided. When the defrosting start signal is received, the operating frequency of the inverter-type compressor is lowered to a low frequency, the two-way valve is opened, the four-way valve is switched, and the defrosting operation is performed, and the defrosting is detected. When a defrosting end signal is received from the means, the inverter compressor is stopped, the two-way valve is closed, and the four-way valve is switched to perform heating operation.
作 用
本発明は上記した構成によって、除霜の開始を検知し周
波数の低下と共に二方弁を開放状態にすることにより、
高温高圧のガスが凍結防止管に流れ、室外熱交換器から
離れたドレン穴付近の氷を融解することができ、また除
霜時の開始と終了時に二方弁が開放状態になっているた
め、高圧と低圧の圧力差が小さくなり、その時に四方弁
が切り替わっても異常な音及び振動は起きない。Function The present invention has the above-described configuration, detects the start of defrosting, and opens the two-way valve as the frequency decreases.
High-temperature, high-pressure gas flows through the antifreeze pipe and can melt ice near the drain hole away from the outdoor heat exchanger, and the two-way valve is open at the start and end of defrosting. , the pressure difference between high pressure and low pressure becomes small, and even if the four-way valve is switched at that time, no abnormal noise or vibration will occur.
実施例
以下本発明の一夫施例の空気調和機の凍結防止装置につ
いて、図面を参照しながら説明する。EXAMPLES Below, an antifreeze device for an air conditioner according to Kazuo's embodiments of the present invention will be described with reference to the drawings.
第１図は、本発明の空気調和機の冷凍サイクル図を示す
ものである。FIG. 1 shows a refrigeration cycle diagram of the air conditioner of the present invention.
同図において、インバータ式圧縮機１、四方弁２、室内
熱交換器３、第１の絞り装置５、第２の絞り装置５、室
外熱交換器６、アキュームレータ７を相欠環状に配管で
連結して冷凍サイクルを構成しＣいる。In the figure, an inverter type compressor 1, a four-way valve 2, an indoor heat exchanger 3, a first expansion device 5, a second expansion device 5, an outdoor heat exchanger 6, and an accumulator 7 are connected by piping in an interdigitated ring shape. A refrigeration cycle is constructed.
そして、前記第１の絞り装置４と第２の絞り装置５０間
に常に高温高圧冷媒が通る吐出配管から二方弁９と凍結
防止管１０を具備したパイ／Ｎ６ス回路８を設けた構成
になっている。And, between the first expansion device 4 and the second expansion device 50, a pipe/N6 gas circuit 8 including a two-way valve 9 and an antifreeze pipe 10 is provided from the discharge pipe through which high-temperature and high-pressure refrigerant always passes. It has become.
ここでは、冷房運転においては省略し、暖房運転時の冷
媒の流れを実線矢印で、また除霜運転時の冷媒の流れを
破線矢印で示し、さらに吐出された高温高圧冷媒の流れ
が凍結防止管１０を通るため、二方弁９が開放状態にな
ることにより熱交換器から離れた場所の凍結を防止する
ことができる。Here, the flow of refrigerant during heating operation is omitted, and the flow of refrigerant during heating operation is shown with a dashed arrow, and the flow of discharged high-temperature, high-pressure refrigerant is shown in the antifreeze tube. 10, the two-way valve 9 is in an open state, thereby preventing freezing of areas away from the heat exchanger.
ような回路である。This is a circuit like this.
次に第２図により、制御回路の概略構成図について説明
する。Next, a schematic configuration diagram of the control circuit will be explained with reference to FIG.
同図はマイクロコンピュータ１４を具備した制御回路で
、室外熱交換器の温度を検知し取り圧すサーミスタ１３
の信号をマイクロコンピュータ１４のボート１で入力し
ている。The figure shows a control circuit equipped with a microcomputer 14, and a thermistor 13 that detects the temperature of the outdoor heat exchanger and removes the pressure.
The signal is input to the port 1 of the microcomputer 14.
この制御回路の出力には、ボート２より信号を出してイ
ンバータ式圧に機１の駆動を行うインバータ部１５とそ
のインバータ部１５より運転されるインバータ式圧縮機
１がある。また、ボート３より信号を出して二方弁９の
リレーコイ／Ｌ／１８に通電し、接点１８ａを投入して
二方弁９をＯＮさせている。前述の動作と同様にボート
４．５．６から信号を出して、リレーコイ／Ｌ／ＩＬ、
１９．１６に通電し、接点１７ａ、１９ａ、ｌｅａを投
入し、四方弁２、室外送風機１２、室内送風機１１をＯ
Ｎさせている。さらに２０は電源で、２１は増幅器、２
２は電源スィッチをボす。The output of this control circuit includes an inverter section 15 that outputs a signal from the boat 2 to drive the machine 1 to inverter pressure, and an inverter compressor 1 operated by the inverter section 15. Further, a signal is issued from the boat 3 to energize the relay coil/L/18 of the two-way valve 9, and the contact 18a is closed to turn the two-way valve 9 ON. Similar to the above operation, send a signal from boat 4.5.6 and relay carp/L/IL.
19. 16 is energized, contacts 17a, 19a, and lea are turned on, and the four-way valve 2, outdoor blower 12, and indoor blower 11 are turned on.
I'm letting it go N. Furthermore, 20 is a power supply, 21 is an amplifier, 2
Step 2: Turn on the power switch.
次に以上のように構成された空気調和機についてその動
作を第２図から第４図を参考に説明する。Next, the operation of the air conditioner configured as described above will be explained with reference to FIGS. 2 to 4.
電源スィッチ２２がＯＮしてから初期設定は、第３図に
示すように室外配管温度設定の除霜開始を決める温度Ｔ
ａ、および除霜路ｒを決める温度Ｔｂ、カウント時間ｎ
＝ｏとして、四方弁２、室内送風機１１、室外法＠機１
２、二方弁９およびインバータ式圧縮機１の運転周波数
の上昇と停止時間設定をｎｌ、除霜開始を検知してイン
バータ式圧縮機１を低周波数運転とする周波数をｆｌ、
および除霜運転時、インバータ式圧縮機１の運１伝周波
数ｆｏを最高とする最高周波数ｆ ＭＡＸ として、
初期化および初期設定を行う（ＳＴＥＰｌ）。After the power switch 22 is turned on, the initial setting is the temperature T that determines the start of defrosting of the outdoor piping temperature setting, as shown in FIG.
a, the temperature Tb that determines the defrosting path r, and the counting time n
= o, four-way valve 2, indoor blower 11, outdoor method @ machine 1
2. Set the operating frequency increase and stop time of the two-way valve 9 and the inverter compressor 1 as nl, and set the frequency that detects the start of defrosting and sets the inverter compressor 1 to low frequency operation as fl.
And, during defrosting operation, the maximum frequency f MAX with the transmission frequency fo of the inverter compressor 1 as the highest,
Perform initialization and initial settings (STEPl).
上記初＋９Ｊ化および初期設定されると、この時二方弁
９は閉状態にて暖房運転が行われる。そして室外の配管
センサー１３で室外の熱交換温度Ｔ。When the initial +9J and initial settings are made, the heating operation is performed with the two-way valve 9 closed. Then, the outdoor heat exchange temperature T is determined by the outdoor piping sensor 13.
を検知して設定温度Ｔａと同じか低ければ、除霜ヲ開始
スヘく、マイクロコンピュータ１４の入力ボート１へ信
号を送る（ＳＴＥＰ２）。そしてマイクロコンピュータ
１４の出力ポート２から信号を出してインバータ式圧縮
機１の運転周波数ｆ。If the temperature is the same as or lower than the set temperature Ta, a signal is sent to the input port 1 of the microcomputer 14 to start defrosting (STEP 2). Then, a signal is output from the output port 2 of the microcomputer 14 to determine the operating frequency f of the inverter compressor 1.
を低周波数’ｆ １へ落とす（ＳＴＥＰ３ ）。また同
時に出力ポート３より信号を出して二方弁９をＯＮＬ、
て開放状態にして凍結防止装置となる。また吐出の冷媒
がバイパス回路８を流れるため、高圧ＨＰＯばＨＰｌか
らＨＰ２ヘダウンし、低圧ＬＰＯもＬＰＩからＬＰ２ヘ
アノブする（ＳＴＥＰ４）、その後ある一定時間カウン
トする（ＳＴＥＰ５ ）。is lowered to a low frequency 'f1 (STEP 3). At the same time, a signal is sent from the output port 3 to turn the two-way valve 9 ON.
When opened, it becomes an anti-freeze device. Further, since the discharged refrigerant flows through the bypass circuit 8, the high pressure HPO goes down from HPl to HP2, and the low pressure LPO also goes down from LPI to LP2 (STEP 4), and then a certain period of time is counted (STEP 5).
そして出力ポート４．５．６より信号を出して四方弁２
、室外送風機１２、および室内送風機１１を停止させる
（ＳＴＥＰ６．７．８）。Then, output a signal from output port 4, 5, 6 to four-way valve 2.
, the outdoor blower 12, and the indoor blower 11 are stopped (STEP 6.7.8).
その結果凍結防止運転を行いながら除霜運転を開始し、
高圧ＨＰＯと低圧ＬＰＯの圧力差が小さいため、四方弁
９が切り替わっても音および振動は小さくなる。そして
、カウント時間をｎ ＝ Ｏと初期化する（ＳＴＥＰ９
）。そしである一定時間カウントする（ＳＴＥＰＩＯ
）。その後出力ポート１より信号を出して、インバータ
駆動部１５よリインバータ式圧縮機１の運転周波数ｆｏ
を最高周波数ｆ ＭＡＸとする（ＳＴＥＰ １１ ’）
。As a result, defrosting operation started while performing anti-freezing operation,
Since the pressure difference between the high pressure HPO and the low pressure LPO is small, the noise and vibration are small even when the four-way valve 9 is switched. Then, initialize the count time to n = O (STEP 9
). Then count for a certain period of time (STEPIO
). After that, a signal is output from the output port 1, and the inverter drive unit 15 outputs the operating frequency fo of the re-inverter compressor 1.
Let be the highest frequency f MAX (STEP 11')
.
そして除霜運転を続け、室外の配管センサー１３で室外
の熱交換器温度ＴＯを検知して、設定温度Ｔｂと同じか
高い値になれば、除霜を終了させるべく、マイクロコン
ピュータ１４０入カポート１′へ信号を送る（ＳＴＥＰ
ｌ２）。これによりマイクロコンピュータ１４は出力ポ
ート２より信号を出してインバータ式圧縮機１を停止さ
せる（ＳＴＥＰｌ３）。この時二方弁９が開放状、態に
あるため高圧ＨＰＯと低圧ＬＰＯとのバランスが短時間
に行われ、カウント時間をｎ＝０と初ＪＱＪ化する（Ｓ
ＴＥＰｌ４）。そしである一定時間カウントする（ＳＴ
ＥＰｌ５）。その時間が経過すると出力ポート３より信
号を出して、二方弁９がＯＦＦで閉状態になる（ＳＴＥ
Ｐｌ６）。続いて出力ポート４．５．６から信号が出て
四方弁２、室外法＠機１２、室内送風機１１が運転状態
となる。この時圧力がバランスしているので四方弁の切
り換えの音はない（ＳＴＥＰｌ７．１Ｂ、１９）そして
出力ポート２より信号を出してインバータ式圧縮機１を
起動させる（ＳＴＥＰ２０）。最後にカウント時間ｎ
＝ Ｏと初期化する（ＳＴＥＰ２０）。Then, the defrosting operation continues, and when the outdoor heat exchanger temperature TO is detected by the outdoor piping sensor 13 and becomes the same as or higher than the set temperature Tb, the microcomputer 140 input port 1 ’ (STEP
l2). As a result, the microcomputer 14 outputs a signal from the output port 2 to stop the inverter compressor 1 (STEP 13). At this time, since the two-way valve 9 is in the open state, the high pressure HPO and low pressure LPO are balanced in a short time, and the count time is n = 0, which is the first JQJ (S
TEPl4). Then count for a certain period of time (ST
EPl5). When that time has elapsed, a signal is output from the output port 3, and the two-way valve 9 is turned OFF and closed (STE
Pl6). Subsequently, a signal is output from the output port 4.5.6, and the four-way valve 2, outdoor fan 12, and indoor blower 11 become operational. At this time, since the pressure is balanced, there is no switching sound of the four-way valve (STEP 17.1B, 19), and a signal is output from the output port 2 to start the inverter compressor 1 (STEP 20). Finally count time n
= O (STEP 20).
その結果暖房運転が行われる。As a result, heating operation is performed.
このような凍結防止装置にて、室外熱交換器６から離れ
たドレン穴付近の木を融解することができ、また除霜時
の開始と終了時に二方弁９が開放状態になっているため
、高圧と低圧の圧力差が小さくなり、その時に四方弁が
切り替わっても異常な音及び振動は起きないような運転
が行える。With such an antifreeze device, it is possible to melt the wood near the drain hole that is far from the outdoor heat exchanger 6, and the two-way valve 9 is open at the start and end of defrosting. , the pressure difference between high pressure and low pressure becomes small, and even if the four-way valve is switched at that time, operation can be performed without causing abnormal noise or vibration.
なお、本実施例においては、除霜運転の終了信号が出た
後に、二方弁を開放状態にしているが除霜運転中に閉状
態にしていても熱交換器から離れた場所の木が解けてい
れば問題はない。In this example, the two-way valve is opened after the defrosting operation end signal is issued, but even if it is closed during the defrosting operation, trees located far from the heat exchanger If it is solved, there is no problem.
発明の効果
上記夫施例でも明らかなように本発明は、除霜運転の開
始信号を受けることにより、インバータ式圧縮機の運転
局波数をｔ内波数に落とし、また二方弁を開放状態にし
て、四方弁を切り換えて除霜運転を行い、除霜終ｒ信号
を受けて、インバータ式圧縮機を停止して二方弁を閉状
態にし、四方弁を切り換えて暖房運転を行うため、室外
熱交換器から離れた場所のドレン穴付近に凍結防止管を
通していれば木を融解することができ、また除霜時の開
始と終ｒ時に二方弁が開放状態になっているため、高圧
と低圧の圧力差が小さくなり、その時に四方弁が切り換
わっても異常な音及び振動は起きないような運転が行な
える。Effects of the Invention As is clear from the above embodiments, the present invention reduces the operating station wave number of the inverter compressor to the wave number within t and opens the two-way valve by receiving the defrosting operation start signal. When the defrost end r signal is received, the inverter compressor is stopped and the two-way valve is closed, and the four-way valve is switched to perform heating operation. Trees can be thawed by passing an antifreeze pipe near the drain hole in a place far away from the heat exchanger, and the two-way valve is open at the beginning and end of defrosting, which prevents high pressure. The pressure difference at low pressure is reduced, and even if the four-way valve is switched at that time, operation can be performed without causing abnormal noise or vibration.
第１図は本発明の一実施例における冷凍サイクル図、第
２図は同凍結防止装置の制御回路の概略構成図、第３図
は同装置の制御内容を示すフローチャート図、第４図は
同装置の動作内容を示すタイムチャート図、第５図は従
来例の熱交換器の側面図、第６図は異なる従来例の凍結
防止管を使用した冷凍サイクル図である。
１・・・・・・インバータ式圧縮機、２・・・・・・四
方弁、３・・・・・・室内熱交換器、４・・・・・・第
１の絞り装置、５・・・・・・第２の絞り装置、６・・
・・・・室外熱交換器、７・・・・・・アキュウムレー
タ、８・・・・・・バイパス［１ｌｉｌｆ％、 ９・・
・・・・二方弁、１０・・・・・・凍結防止管。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名３−
−− を古鋒女決器
６一−−室外悠文換界
〈−−一餘１？
１−−− インバータ式Ｊ王語ｉ曵
２− 四方弁
９− 二方弁
１３−−−ブーミスタ
第３図
第４図Fig. 1 is a refrigeration cycle diagram in one embodiment of the present invention, Fig. 2 is a schematic configuration diagram of the control circuit of the antifreeze device, Fig. 3 is a flowchart showing the control contents of the device, and Fig. 4 is the same. FIG. 5 is a side view of a conventional heat exchanger, and FIG. 6 is a diagram of a refrigeration cycle using a different conventional antifreeze tube. 1... Inverter compressor, 2... Four-way valve, 3... Indoor heat exchanger, 4... First expansion device, 5... ...Second aperture device, 6...
...Outdoor heat exchanger, 7...Accumulator, 8...Bypass [1lilf%, 9...
... Two-way valve, 10 ... Freeze prevention pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person3-
-- The Gufeng Woman's Decisive Instrument 61 -- Murogai Yubun Exchange World < -- One Piece 1? 1---- Inverter type J-type 2- Four-way valve 9- Two-way valve 13--Boomister Figure 3 Figure 4
Claims (1)
り装置、第２の絞り装置、室外熱交換器、アキュームレ
ータを順次環状に配管で連結して冷凍サイクルを構成し
、第１の絞り装置と第２の絞り装置の間に、常に高温高
圧冷媒が通る吐出配管から二方弁と凍結防止管を具備し
たバイパス回路を設け、さらに除霜運転の開始と終了の
検知を行う除霜検知手段と、この除霜検知手段の出力に
より前記インバータ式圧縮機、四方弁、二方弁の作動を
制御する手段を具備し、除霜開始信号を受けることによ
り、前記インバータ式圧縮機の運転周波数を低周波数に
落とし、また二方弁を開放状態にして、四方弁を切り換
えて除霜運転を行い、除霜検知手段から霜が溶解した信
号を受けたとき、二方弁を閉状態にする信号と、前記イ
ンバータ式圧縮機を停止する信号と、四方弁を切り換え
て暖房運転を行う信号を出力するようにした空気調和機
の凍結防止装置。A refrigeration cycle is constructed by connecting an inverter compressor, a four-way valve, an indoor heat exchanger, a first throttle device, a second throttle device, an outdoor heat exchanger, and an accumulator in an annular manner with piping. A bypass circuit equipped with a two-way valve and anti-freeze pipe is installed between the device and the second throttling device, from the discharge pipe through which high-temperature, high-pressure refrigerant always passes, and a defrost detection system is installed to detect the start and end of defrosting operation. and means for controlling the operation of the inverter compressor, the four-way valve, and the two-way valve based on the output of the defrosting detection means, and by receiving the defrosting start signal, the operating frequency of the inverter compressor is controlled. is lowered to a low frequency, the two-way valve is opened, and the four-way valve is switched to perform defrosting operation, and when a signal that the frost has melted is received from the defrost detection means, the two-way valve is closed. An antifreeze device for an air conditioner configured to output a signal, a signal to stop the inverter compressor, and a signal to switch a four-way valve to perform heating operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328542A JPH01169284A (en) | 1987-12-24 | 1987-12-24 | Freezing prevention device for air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328542A JPH01169284A (en) | 1987-12-24 | 1987-12-24 | Freezing prevention device for air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01169284A true JPH01169284A (en) | 1989-07-04 |
Family
ID=18211443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62328542A Pending JPH01169284A (en) | 1987-12-24 | 1987-12-24 | Freezing prevention device for air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01169284A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010127602A (en) * | 2008-12-01 | 2010-06-10 | Daikin Ind Ltd | Refrigerating device |
| JP2022510618A (en) * | 2018-12-29 | 2022-01-27 | 広東美的制冷設備有限公司 | Air conditioning system control methods, air conditioning system control devices, air conditioning systems, electronic devices, and storage media |
-
1987
- 1987-12-24 JP JP62328542A patent/JPH01169284A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010127602A (en) * | 2008-12-01 | 2010-06-10 | Daikin Ind Ltd | Refrigerating device |
| JP2022510618A (en) * | 2018-12-29 | 2022-01-27 | 広東美的制冷設備有限公司 | Air conditioning system control methods, air conditioning system control devices, air conditioning systems, electronic devices, and storage media |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4654828B2 (en) | Air conditioner | |
| EP0676602A1 (en) | Operation control device for air conditioning equipment | |
| JPH0213765A (en) | Refrigerating cycle system | |
| CN103363707B (en) | Heat pump type air conditioner | |
| JPH0529830B2 (en) | ||
| JP2003240391A (en) | Air conditioner | |
| CN202546973U (en) | Heat pump type air conditioner | |
| JPH026432B2 (en) | ||
| JPH07332815A (en) | Defrosting operation control device for air conditioner | |
| JPH04270876A (en) | Defrosting controller for heat pump type air-conditioning machine | |
| JPH01169284A (en) | Freezing prevention device for air conditioner | |
| JP2597634Y2 (en) | Pressure equalizer in multi-room air-conditioning heat pump system | |
| CN208620689U (en) | A kind of air-conditioner defrosting structure and air-conditioning system | |
| JP2002098451A (en) | Heat pump type air conditioner | |
| JP3343916B2 (en) | Refrigeration equipment | |
| JPH0452469A (en) | Air conditioner | |
| CN111219803A (en) | Multi-split air conditioner and defrosting method thereof | |
| JPH033903Y2 (en) | ||
| CN216346710U (en) | Air conditioning system for defrosting without stopping machine | |
| JP3337264B2 (en) | Air conditioner defroster | |
| JPH0217370A (en) | Operation control device for air conditioning device | |
| JPH08285393A (en) | Air conditioner for multi-room | |
| JP3367649B2 (en) | Operation control method of air conditioner | |
| JPS6346350B2 (en) | ||
| JP3229111B2 (en) | Ice storage type air conditioner |