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JPH0328279Y2 - - Google Patents

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Publication number
JPH0328279Y2
JPH0328279Y2 JP11479184U JP11479184U JPH0328279Y2 JP H0328279 Y2 JPH0328279 Y2 JP H0328279Y2 JP 11479184 U JP11479184 U JP 11479184U JP 11479184 U JP11479184 U JP 11479184U JP H0328279 Y2 JPH0328279 Y2 JP H0328279Y2
Authority
JP
Japan
Prior art keywords
compressor
capacity
refrigeration cycle
operation command
heat exchanger
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.)
Expired
Application number
JP11479184U
Other languages
Japanese (ja)
Other versions
JPS6134066U (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP11479184U priority Critical patent/JPS6134066U/en
Publication of JPS6134066U publication Critical patent/JPS6134066U/en
Application granted granted Critical
Publication of JPH0328279Y2 publication Critical patent/JPH0328279Y2/ja
Granted legal-status Critical Current

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  • Air Conditioning Control Device (AREA)

Description

【考案の詳細な説明】 [考案の技術分野] この考案は1ユニツト内に2つの相互に独立し
た冷凍サイクルをもつ能力可変型空気調和機に係
り、特に暖房運転時に作動する除霜制御装置を改
良したものである。
[Detailed description of the invention] [Technical field of the invention] This invention relates to a variable capacity air conditioner that has two mutually independent refrigeration cycles in one unit, and specifically includes a defrosting control device that operates during heating operation. This is an improved version.

[考案の技術的背景] 従来、1ユニツト内に2つの相互に独立した冷
凍サイクルをもつ能力可変型空気調和機は、一方
の冷凍サイクルを能力一定な圧縮機を有する空冷
ヒートポンプにより形成し、他方の冷凍サイクル
は能力可変自在な圧縮機を有する空冷ヒートポン
プにより形成してある。そして、この能力可変自
在な圧縮機側の他方の冷凍サイクルが能力制御に
より能力をセーブした状態で暖房運転を行なつて
いる時、能力一定な圧縮機側の一方の冷凍サイク
ルが除霜運転に入つても能力可変自在な圧縮機側
は能力をセーブしたまま運転するようになつてい
た。
[Technical background of the invention] Conventionally, a variable capacity air conditioner having two mutually independent refrigeration cycles in one unit has one refrigeration cycle formed by an air-cooled heat pump having a compressor with constant capacity, and the other refrigeration cycle formed by an air-cooled heat pump having a compressor with constant capacity. The refrigeration cycle is formed by an air-cooled heat pump with a variable capacity compressor. When the other refrigeration cycle on the compressor side, which has variable capacity, is performing heating operation with its capacity saved by capacity control, one refrigeration cycle on the compressor side, whose capacity is constant, is in defrosting operation. Even when the compressor was turned on, the variable capacity compressor continued to operate with its capacity saved.

[背景技術の問題点] ところが、上記従来の能力可変型空気調和機で
は、能力一定な圧縮機側が除霜運転に入つても能
力可変自在な圧縮機側は能力をセーブしたままの
状態であつたため次の欠点があつた。
[Problems with the Background Art] However, in the above-mentioned conventional variable capacity air conditioner, even when the compressor side with a constant capacity enters defrosting operation, the compressor side with a variable capacity remains in a state where the capacity is saved. This resulted in the following drawbacks.

1 除霜運転時室内ユニツトから冷風が吹き出
す。
1 Cold air blows out from the indoor unit during defrosting operation.

2 冷風吹出し防止のため、室内フアンモータを
停止させていたが、この方法では除霜時間が非
常に長くなり、暖房効率が悪い。
2. In order to prevent cold air from blowing out, the indoor fan motor was stopped, but with this method the defrosting time was extremely long and the heating efficiency was poor.

[考案の目的] この考案は、上記事情を考慮してなされたもの
で、除霜運転時に室内フアンモータを停止するこ
となく室内ユニツトから冷風が吹き出すのを防止
し、もつて暖房効率の高い能力可変型空気調和機
の除霜制御装置を提供することを目的とする。
[Purpose of the invention] This invention was made in consideration of the above circumstances, and it prevents cold air from blowing out from the indoor unit without stopping the indoor fan motor during defrosting operation, thereby achieving high heating efficiency. The purpose of the present invention is to provide a defrosting control device for a variable air conditioner.

[考案の概要] この考案は上記目的を達成するために、圧縮
機、四方弁、室外熱交換器、減圧装置及び室内熱
交換器からなる2つ独立した冷凍サイクルを1ユ
ニツト内に設けると共に、両室内熱交換器を合体
させ、一方の冷凍サイクルに能力一定の圧縮機を
用い、他方の冷凍サイクルに能力可変の圧縮機を
用い、両冷凍サイクルを制御系により運転する能
力可変型空気調和機において、暖房運転時の室内
熱交換器の着霜を検知するセンサと、該センサが
能力一定な圧縮機を有する冷凍サイクル側の着霜
を検知した時、そのサイクルの四方弁を除霜サイ
クルに切換える除霜運転指令を与えると共に室内
フアンモータの運転を維持し、かつ能力可変の圧
縮機へ最大能力運転指令を与える運転指令手段と
を上記制御系に備えたもので、これにより除霜運
転に入つている冷凍サイクル側の室内ユニツト部
から吹き出る冷風を、最大能力運転に入つた冷凍
サイクル側の室内ユニツト部から吹き出る温風で
相殺できるようにし、室内ユニツトから冷風が吹
き出したり、暖房効率が低下したりしないように
したものである。
[Summary of the invention] In order to achieve the above object, this invention provides two independent refrigeration cycles consisting of a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducing device, and an indoor heat exchanger in one unit, and A variable capacity air conditioner that combines both indoor heat exchangers, uses a constant capacity compressor in one refrigeration cycle, uses a variable capacity compressor in the other refrigeration cycle, and operates both refrigeration cycles by a control system. , a sensor detects frost formation on the indoor heat exchanger during heating operation, and when the sensor detects frost formation on the refrigeration cycle side that has a compressor with constant capacity, the four-way valve of that cycle is set to the defrost cycle. The above control system is equipped with an operation command means that gives a defrosting operation command to switch, maintains the operation of the indoor fan motor, and gives a maximum capacity operation command to a variable capacity compressor. The cold air blown out from the indoor unit on the refrigeration cycle side that is in the refrigeration cycle can be offset by the warm air blown out from the indoor unit on the refrigeration cycle side that has entered maximum capacity operation, preventing cold air from blowing out from the indoor unit and reducing heating efficiency. I tried not to do that.

[考案の実施例] この考案の実施例を第1図〜第4図に基づいて
説明すれば以下の通りである。
[Embodiment of the invention] An embodiment of the invention will be described below based on FIGS. 1 to 4.

第1図は、2つの冷凍サイクルを独立させて1
ユニツト内に設けるとともに、一方の冷凍サイク
ルAを能力一定な圧縮機1を有するヒートポンプ
で形成し、他方の冷凍サイクルBを能力可変自在
な圧縮機2を有するヒートポンプで形成した能力
可変型空気調和機の冷凍サイクル構成図を示す。
同図中、Cは室内側、Dは室外側であり、3は共
通の室内熱交換器、4a,4bは減圧装置として
の膨張弁、5a,5bは逆止弁、6a,6bは室
外熱交換器、7a,7bは四方弁、8a,8bは
室外熱交換器の着霜を検知するために各室外熱交
換器6a,6bに設けた着霜センサである。記号
の添字aは能力一定な圧縮機1側の冷凍サイクル
A中に、添字bは能力可変自在な圧縮機2側の冷
凍サイクルB中にあることを意味する。上記セン
サ8a,8bの出力は、これらの冷凍サイクルA
及びBの運転を制御する制御回路9に接続してあ
る。なお、図中、実線矢印は冷凍サイクルを点線
矢印は暖房サイクルを示す。
Figure 1 shows two independent refrigeration cycles.
A variable capacity air conditioner is provided within the unit, and one refrigeration cycle A is formed by a heat pump having a constant capacity compressor 1, and the other refrigeration cycle B is formed by a heat pump having a compressor 2 whose capacity is variable. The refrigeration cycle configuration diagram is shown below.
In the figure, C is the indoor side, D is the outdoor side, 3 is a common indoor heat exchanger, 4a and 4b are expansion valves as pressure reducing devices, 5a and 5b are check valves, and 6a and 6b are outdoor heat exchangers. The exchangers 7a and 7b are four-way valves, and 8a and 8b are frost sensors provided on each outdoor heat exchanger 6a and 6b to detect frost formation on the outdoor heat exchanger. The subscript a of the symbol means that it is in the refrigeration cycle A on the compressor 1 side, whose capacity is constant, and the subscript b means that it is in the refrigeration cycle B on the compressor 2 side, whose capacity is variable. The outputs of the sensors 8a and 8b are the refrigeration cycle A.
and B are connected to a control circuit 9 that controls the operation of the motors. In addition, in the figure, a solid line arrow indicates a refrigeration cycle, and a dotted line arrow indicates a heating cycle.

第2図は制御回路9の概略構成を示すブロツク
図であり、この制御回路9は制御パネル10から
の信号dに基づいて能力可変自在な圧縮機2に運
転指令aを能力一定な圧縮機1やフアンモータ・
四方弁7a,7bに制御指令b,cをそれぞれ与
える公知の回路構成(図示せず)を有するととも
に、着霜センサ8からの出力信号eに基づいて能
力可変自在な圧縮機2及び四方弁7a,7bに運
転指令を与えて除霜制御を行なう以下の構成から
成る運転指令回路が設けてある。
FIG. 2 is a block diagram showing a schematic configuration of the control circuit 9. This control circuit 9 sends an operation command a to a compressor 2 whose capacity is variable based on a signal d from a control panel 10. or fan motor/
The compressor 2 and the four-way valve 7a have a known circuit configuration (not shown) that gives control commands b and c to the four-way valves 7a and 7b, respectively, and whose capacity can be varied based on the output signal e from the frost sensor 8. , 7b is provided with an operation command circuit having the following configuration for performing defrosting control by giving operation commands to the motors 7b and 7b.

上記運転指令回路は、暖房運転時着霜センサ8
からの出力信号eに基づいて室外熱交換器6aに
着霜したか否かを判断し、着霜を検知したとき四
方弁7aを切換えて冷房運転である除霜サイクル
に変更する除霜運転指令fを四方弁7aに与える
とともに、着霜検知信号gを出力する着霜判断回
路11を有する。この着霜判断回路11は、比較
回路12に接続され、着霜検知信号gを受けたと
き比較回路12が作動するようになつている。こ
の比較回路12はその作動により、能力可変自在
な圧縮機2に付与されている能力運転指令iと最
大能力運転指令hとを比較し、能力運転指令iが
最大能力運転指令に達していないとき能力可変自
在な圧縮機2の能力運転指令iを最大能力運転指
令hに強制的に切換える機能を有する。
The above operation command circuit includes the frost formation sensor 8 during heating operation.
A defrosting operation command that determines whether or not frost has formed on the outdoor heat exchanger 6a based on the output signal e from the , and when frost formation is detected, switches the four-way valve 7a to change to the defrosting cycle that is cooling operation. It has a frost formation determination circuit 11 which applies the signal f to the four-way valve 7a and outputs a frost formation detection signal g. This frost formation judgment circuit 11 is connected to a comparison circuit 12, and the comparison circuit 12 is activated when receiving the frost formation detection signal g. By its operation, this comparison circuit 12 compares the capacity operation command i given to the variable capacity compressor 2 with the maximum capacity operation command h, and when the capacity operation command i does not reach the maximum capacity operation command It has a function of forcibly switching the capacity operation command i of the compressor 2 whose capacity is variable to the maximum capacity operation command h.

さて、上記のような構成において、今、能力可
変自在な圧縮機2側の冷凍サイクルBがその運転
指令aにより能力をセーブして暖房運転中にある
場合において、能力一定の圧縮機1側の冷凍サイ
クルAを構成する側の室外熱交換器6a部が着霜
すると、この着霜情報は着霜センサ8aにより電
気信号に変換されて運転指令回路に入力し、その
着霜判断回路11が室外熱交換器6a着霜を検知
し、これより、除霜運転指令fを四方弁7aに、
着霜検知信号gを比較回路12に同時に与える。
したがつて、能力一定な圧縮機1側の冷凍サイク
ルAは実質的に冷房運転である除霜サイクルに入
ると同時に、着霜検知信号gを受けた比較回路1
2によつて他方の冷凍サイクルB側の能力可変自
在な圧縮機2は、これに最大能力運転指令が強制
的に与えられてセーブ運転から最大能力運転に切
換わる。
Now, in the above configuration, when the refrigeration cycle B on the compressor 2 side with variable capacity is currently in heating operation with its capacity saved by the operation command a, the refrigeration cycle B on the compressor 1 side with a constant capacity is currently in heating operation. When the outdoor heat exchanger 6a on the side constituting the refrigeration cycle A becomes frosted, this frosting information is converted into an electric signal by the frosting sensor 8a and input to the operation command circuit, and the frosting judgment circuit 11 Frost formation is detected on the heat exchanger 6a, and from this, a defrosting operation command f is sent to the four-way valve 7a.
The frost formation detection signal g is given to the comparator circuit 12 at the same time.
Therefore, the refrigeration cycle A on the compressor 1 side, which has a constant capacity, enters the defrosting cycle, which is essentially a cooling operation, and at the same time, the comparison circuit 1 receives the frost detection signal g.
2, the variable capacity compressor 2 on the other refrigeration cycle B side is forcibly given a maximum capacity operation command and switched from save operation to maximum capacity operation.

このため、室内ユニツト側Cの室内熱交換器3
では、除霜運転に入つた冷凍サイクルAによる冷
却と、最大能力運転に切換つた冷凍サイクルBに
よる暖房と同時に行なわれ、能力が大きい冷凍サ
イクルBによる暖房が冷凍サイクルAによる冷却
を上廻ることになる。その結果、第4図に示す如
く、一方が除霜運転に入つても、なお他方の冷凍
サイクルをセーブ運転していたことにより、除霜
運転によつて吹出し温度が吸込温度nより降下し
ていた従来のものlに比して、本実施例のものは
mで示すように室内ユニツトCからの吹出温度を
吸込温度n、すなわち室温よりも高くすることが
できる。このため室内フアンモータ(図示せず)
を停止させる必要がなくなり、室外熱交換器6a
の除霜時間を可及的に短くすることができる。
Therefore, the indoor heat exchanger 3 on the indoor unit side C
In this case, cooling by refrigeration cycle A, which has entered defrosting operation, and heating by refrigeration cycle B, which has switched to maximum capacity operation, are performed simultaneously, and the heating by refrigeration cycle B, which has a large capacity, exceeds the cooling by refrigeration cycle A. Become. As a result, as shown in Figure 4, even when one of the refrigeration cycles entered the defrosting operation, the other refrigeration cycle was still in the save operation, so the blowout temperature fell below the suction temperature n due to the defrosting operation. Compared to the conventional device 1, the device of this embodiment can make the blowing temperature from the indoor unit C higher than the suction temperature n, that is, the room temperature, as shown by m. For this purpose, an indoor fan motor (not shown)
There is no need to stop the outdoor heat exchanger 6a.
Defrosting time can be shortened as much as possible.

第5図は第2図の実施例の変形例を示すもの
で、第2図と異なる点は、四方弁7に除霜運転指
令fを与える着霜判断回路11の出力側に所定時
間に設定したタイマ13を介設した点で、これに
より除霜運転開始に先立つ一定時間前に能力可変
自在な圧縮機2を最大能力可運転させるようにし
たもので、その結果、除霜運転開始時のドラフト
の発生を防止し、不快感を生じないようにするこ
とができる。
FIG. 5 shows a modification of the embodiment shown in FIG. 2, and the difference from FIG. The timer 13 is provided so that the variable capacity compressor 2 can be operated at maximum capacity a certain period of time before the start of the defrosting operation, and as a result, the timer 13 at the start of the defrosting operation It is possible to prevent drafts from occurring and avoid discomfort.

[考案の効果] 以上要するにこの考案によれば次のような優れ
た効果を発揮する。
[Effects of the invention] In summary, this invention provides the following excellent effects.

1 能力可変自在な圧縮機側が能力をセーブして
暖房運転をしている場合において、能力一定な
圧縮機側が除霜運転に入つた時、能力可変型自
在な圧縮機側を最大能力で暖房運転させるよう
にしたので、室内ユニツトから吹出す温風は室
内ユニツトに吸込まれる室内温度以下になら
ず、このため室温を維持することができ、室内
ユニツトからの冷風の吹出しを有効に防止する
ことができる。
1 When the variable capacity compressor side saves capacity and performs heating operation, when the constant capacity compressor side enters defrosting operation, the variable capacity compressor side starts heating operation at maximum capacity. As a result, the hot air blown out from the indoor unit does not drop below the room temperature that is sucked into the indoor unit, making it possible to maintain the room temperature and effectively preventing the blowing of cold air from the indoor unit. I can do it.

2 除霜運転中に室内フアンモータを停止させる
従来のものに比して、除霜運転中にあつても室
内フアンモータを停止させないで除霜時間を可
及的に短くすることができ、暖房効率が向上す
る。
2. Compared to conventional systems that stop the indoor fan motor during defrosting operation, the defrosting time can be shortened as much as possible without stopping the indoor fan motor even during defrosting operation. Increased efficiency.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの考案に係る能力可変型空気調和機
の冷凍サイクル構成図、第2図は同除霜制御装置
の一実施例を示すブロツク図、第3図は同ブロツ
クのタイミングチヤート、第4図は吹出温度特性
図、第5図は除霜制御装置の変形例を示すブロツ
ク図である。 図中、1は能力一定な圧縮機、2は能力可変自
在な圧縮機、3は室内熱交換器、6a,6bは室
外熱交換器、8a,8bは直霜を検知するセン
サ、9は制御系たる制御回路、11及び12は運
転指令手段を構成する着霜判断回路と比較回路、
13はタイマ、Aは能力一定な圧縮機側の冷凍サ
イクル、Bは能力可変自在な圧縮機側の冷凍サイ
クル、Cは室内ユニツト、fは除霜運転指令、i
は能力運転指令、hは最大能力運転指令である。
Fig. 1 is a refrigeration cycle configuration diagram of a variable capacity air conditioner according to this invention, Fig. 2 is a block diagram showing an embodiment of the same defrosting control device, Fig. 3 is a timing chart of the same block, and Fig. 4 is a block diagram showing an embodiment of the same defrosting control device. The figure is a blowout temperature characteristic diagram, and FIG. 5 is a block diagram showing a modification of the defrosting control device. In the figure, 1 is a compressor with constant capacity, 2 is a compressor with variable capacity, 3 is an indoor heat exchanger, 6a, 6b are outdoor heat exchangers, 8a, 8b are sensors that detect direct frost, 9 is a control 11 and 12 are a frost formation judgment circuit and a comparison circuit that constitute the operation command means;
13 is a timer, A is a refrigeration cycle on the compressor side with constant capacity, B is a refrigeration cycle on the compressor side with variable capacity, C is an indoor unit, f is a defrosting operation command, i
is the capacity operation command, and h is the maximum capacity operation command.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 圧縮機、四方弁、室外熱交換器、減圧装置及び
室内熱交換器からなる2つ独立した冷凍サイクル
を1ユニツト内に設けると共に、両室内熱交換器
を合体させ、一方の冷凍サイクルに能力一定の圧
縮機を用い、他方の冷凍サイクルに能力可変の圧
縮機を用い、両冷凍サイクルを制御系により運転
する能力可変型空気調和機において、暖房運転時
の室外熱交換器の着霜を検知するセンサと、該セ
ンサが能力一定な圧縮機を有する冷凍サイクル側
の着霜を検知した時、そのサイクルの四方弁を除
霜サイクルに切換える除霜運転指令を与えると共
に室内フアンモータの運転を維持し、かつ能力可
変の圧縮機へ最大能力運転指令を与える運転指令
手段とを上記制御系に備えたことを特徴とする空
気調和機の除霜制御装置。
Two independent refrigeration cycles consisting of a compressor, four-way valve, outdoor heat exchanger, decompression device, and indoor heat exchanger are installed in one unit, and both indoor heat exchangers are combined to provide one refrigeration cycle with a constant capacity. Detect frost formation on the outdoor heat exchanger during heating operation in a variable capacity air conditioner that uses one compressor and a variable capacity compressor in the other refrigeration cycle, and both refrigeration cycles are operated by a control system. When the sensor detects frost on the refrigeration cycle side that has a compressor with constant capacity, it issues a defrost operation command to switch the four-way valve of that cycle to the defrost cycle and maintains the operation of the indoor fan motor. A defrosting control device for an air conditioner, characterized in that the control system is equipped with: and an operation command means for giving a maximum capacity operation command to a variable capacity compressor.
JP11479184U 1984-07-30 1984-07-30 Defrosting control device for variable capacity air conditioners Granted JPS6134066U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11479184U JPS6134066U (en) 1984-07-30 1984-07-30 Defrosting control device for variable capacity air conditioners

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11479184U JPS6134066U (en) 1984-07-30 1984-07-30 Defrosting control device for variable capacity air conditioners

Publications (2)

Publication Number Publication Date
JPS6134066U JPS6134066U (en) 1986-03-01
JPH0328279Y2 true JPH0328279Y2 (en) 1991-06-18

Family

ID=30673791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11479184U Granted JPS6134066U (en) 1984-07-30 1984-07-30 Defrosting control device for variable capacity air conditioners

Country Status (1)

Country Link
JP (1) JPS6134066U (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002286273A (en) * 2001-03-28 2002-10-03 Mitsubishi Electric Corp Air conditioner
JP6208086B2 (en) * 2014-06-30 2017-10-04 株式会社コロナ Combined heat source heat pump device

Also Published As

Publication number Publication date
JPS6134066U (en) 1986-03-01

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