JP3047297B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP3047297B2 JP3047297B2 JP2091483A JP9148390A JP3047297B2 JP 3047297 B2 JP3047297 B2 JP 3047297B2 JP 2091483 A JP2091483 A JP 2091483A JP 9148390 A JP9148390 A JP 9148390A JP 3047297 B2 JP3047297 B2 JP 3047297B2
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- refrigerant heater
- refrigerant
- valve
- air conditioner
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） この発明は、冷媒加熱器を備えた空気調和機に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to an air conditioner provided with a refrigerant heater.
（従来の技術） 空気調和機においては、冷凍サイクルに冷媒加熱器を
組み込み、冷媒加熱器の冷媒加熱作用により暖房運転を
行なうものがある。一例を第３図に示す。第３図におい
て、１は能力可変圧縮機で、その圧縮機１の吐出側冷媒
配管に四方弁２を介して室外熱交換器３を接続し、その
室外熱交換器３に逆止弁（順方向）および膨張弁５を介
して室内熱交換器６を接続している。そして、室内熱交
換器６を上記四方弁２および逆止弁７（順方向）を介し
て圧縮機１の吸入側冷媒配管に接続している。(Related Art) In some air conditioners, a refrigerant heater is incorporated in a refrigeration cycle, and a heating operation is performed by the refrigerant heating action of the refrigerant heater. An example is shown in FIG. In FIG. 3, reference numeral 1 denotes a variable capacity compressor, in which an outdoor heat exchanger 3 is connected to a discharge side refrigerant pipe of the compressor 1 via a four-way valve 2, and a check valve (a forward valve) is connected to the outdoor heat exchanger 3. Direction) and an expansion valve 5 to which an indoor heat exchanger 6 is connected. The indoor heat exchanger 6 is connected to the suction-side refrigerant pipe of the compressor 1 via the four-way valve 2 and the check valve 7 (forward direction).
さらに、上記逆止弁４と膨張弁５との接続部から圧縮
機１の吸込側冷媒配管にかけて、電磁開閉弁８および冷
媒加熱器９を順次接続し、冷凍サイクルを構成してい
る。Further, an electromagnetic on-off valve 8 and a refrigerant heater 9 are sequentially connected from a connection portion between the check valve 4 and the expansion valve 5 to a suction side refrigerant pipe of the compressor 1 to constitute a refrigeration cycle.
冷媒加熱器９は、ガスバーナ10を付属して備えてお
り、そのガスバーナ10を電磁開閉弁11を介して燃料供給
源（図示しない）に接続している。なお、上記冷媒加熱
器９は加熱防止器12を設けている。The refrigerant heater 9 is provided with a gas burner 10 attached thereto, and the gas burner 10 is connected to a fuel supply source (not shown) via an electromagnetic on-off valve 11. Note that the refrigerant heater 9 is provided with a heating preventer 12.
すなわち、冷房運転時は、電磁開閉弁８を閉成した状
態で圧縮機１を起動し、図示実線矢印の方向に冷媒を流
して室外熱交換器３を凝縮器、室内熱交換器６を蒸発器
として働かせるようにしている。That is, during the cooling operation, the compressor 1 is started with the electromagnetic on-off valve 8 closed, and the refrigerant flows in the direction of the solid line arrow to evaporate the outdoor heat exchanger 3 and the indoor heat exchanger 6. I try to work as a container.
暖房運転時は、電磁開閉弁８を開放した状態で圧縮機
１を起動するとともに、四方弁２を切換作動し、さらに
冷媒加熱器９を運転（ガスバーナ10を燃焼）し、図示破
線矢印の方向に冷媒を流して室内熱交換器６を凝縮器、
冷媒加熱器９を蒸発器として働かせるようにしている。During the heating operation, the compressor 1 is started while the electromagnetic on-off valve 8 is opened, the four-way valve 2 is switched, and the refrigerant heater 9 is operated (the gas burner 10 is burned). The indoor heat exchanger 6 by flowing a refrigerant through the condenser,
The refrigerant heater 9 functions as an evaporator.
（発明が解決しようとする課題） 上記第３図に示す構成を有する空気調和機において、
圧縮機１への電気供給系統の異常あるいは圧縮機１自体
の異常により圧縮機１が正常に回らなかった場合、即ち
圧縮機が所定の回転数以上に達しない又は回転を行わな
い状態の時には、冷媒加熱器９が過熱されるため、過熱
防止器12が作動する。そして、コントローラ（図示しな
い）は過熱防止器12の作動を検知し、バーナ８の開閉弁
11を閉制御する。この結果、バーナ８の燃焼を停止し
て、冷媒過熱器９の過熱を防止して、装置の安全性を保
っていた。(Problem to be Solved by the Invention) In the air conditioner having the configuration shown in FIG.
When the compressor 1 does not rotate normally due to an abnormality in an electric supply system to the compressor 1 or an abnormality in the compressor 1 itself, that is, when the compressor does not reach a predetermined rotation speed or more or does not rotate, Since the refrigerant heater 9 is overheated, the overheat protector 12 operates. Then, a controller (not shown) detects the operation of the overheat protector 12 and opens and closes the burner 8.
11 is closed. As a result, the combustion of the burner 8 is stopped, the overheating of the refrigerant superheater 9 is prevented, and the safety of the apparatus is maintained.
しかし、従来の空気調和機においては、過熱防止器12
が故障している場合、あるいは過熱防止器12の取付ミ
ス、脱落等があった場合には、上記した原因により圧縮
機１が正常に回らなくて冷媒加熱器９が異常過熱あるい
は損傷しても、バーナ８の燃焼を停止させることはでき
なかった。従って、従来の空気調和機においては、過熱
防止器12が故障している場合、あるいは過熱防止器12の
取付ミス、脱落等があった場合の安全性が十分ではなか
った。However, in the conventional air conditioner, the overheat protector 12
When the compressor 1 does not rotate normally due to the above-mentioned cause and the refrigerant heater 9 abnormally overheats or is damaged due to the above-described cause, or when there is a mistake in mounting the overheat protector 12, However, the combustion of the burner 8 could not be stopped. Therefore, in the conventional air conditioner, when the overheat protector 12 is out of order, or when the overheat protector 12 is incorrectly attached or dropped, the safety is not sufficient.
本発明は上記の点に鑑みてなされたもので、その目的
は冷媒加熱器を備えた空気調和機において、冷媒加熱器
に設けられた過熱防止器が正常に動作しなくても圧縮機
の故障に起因する冷媒加熱器の過熱を防止することがで
きる空気調和機を提供することにある。The present invention has been made in view of the above points, and an object of the present invention is to provide an air conditioner equipped with a refrigerant heater, in which even if the overheat protector provided in the refrigerant heater does not operate normally, the compressor may fail. An object of the present invention is to provide an air conditioner that can prevent overheating of a refrigerant heater caused by the above.
［発明の構成］ （課題を解決するための手段） 本発明は、圧縮機、室内熱交換器、減圧器、冷媒加熱
器を順次接続してなる冷凍サイクルを備え、上記冷媒加
熱器の冷媒加熱作用により暖房運転を行なう空気調和機
において、上記圧縮機の運転電流を検出する運転電流検
出手段と、上記冷媒加熱器の運転中に上記運転電流検出
手段により検出される上記圧縮機の運転電流が設定電流
以下になることを検出した場合に上記冷媒加熱器の運転
を停止する手段とを設ける。[Means for Solving the Problems] The present invention includes a refrigerating cycle in which a compressor, an indoor heat exchanger, a decompressor, and a refrigerant heater are sequentially connected, and the refrigerant heating of the refrigerant heater is performed. In an air conditioner performing a heating operation by an operation, an operating current detecting means for detecting an operating current of the compressor, and an operating current of the compressor detected by the operating current detecting means during operation of the refrigerant heater. Means for stopping the operation of the refrigerant heater when it is detected that the current becomes equal to or less than the set current.
（作用） 圧縮機の運転電流を検出する運転電流検出手段を設け
る。暖房運転時、冷媒加熱器が運転中、つまりガスバー
ナが燃焼中に該運転電流が設定電流以下、即ち圧縮機が
所定の回転数以上に達しない又は回転を行わない状態に
なった場合には、冷媒加熱器の運転を停止する。(Operation) An operating current detecting means for detecting an operating current of the compressor is provided. During the heating operation, when the refrigerant heater is operating, that is, when the gas burner is burning, the operating current is equal to or less than the set current, that is, when the compressor does not reach a predetermined rotation speed or more or does not rotate, Stop the operation of the refrigerant heater.
（実施例） 以下、この発明の一実施例について図面を参照して説
明する。なお、図面において第３図と同一部分には同一
符号を付し、その詳細な説明は省略する。Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same parts as those in FIG. 3 are denoted by the same reference numerals, and detailed description thereof will be omitted.
第１図に示すように、圧縮機１の運転電流を検出する
電流検出部21を設ける。As shown in FIG. 1, a current detecting unit 21 for detecting the operating current of the compressor 1 is provided.
22は空気調和機全般にわたる制御を行なう制御部で、
マイクロコンピュータおよびその周辺回路からなる。22 is a control unit that controls the entire air conditioner,
It consists of a microcomputer and its peripheral circuits.
この制御部22に、圧縮機１、四方弁２、電磁開閉弁
８、電磁開閉弁11、過熱防止器12、電流検出部21を接続
する。The compressor 1, the four-way valve 2, the electromagnetic on-off valve 8, the electromagnetic on-off valve 11, the overheat protector 12, and the current detection unit 21 are connected to the control unit 22.
制御部22は、通常の冷房運転制御の他に、圧縮機１の
運転，四方弁２の切換，電磁開閉弁８の開放、および冷
媒加熱器９の運転（ガスバーナ10の燃焼）により暖房運
転を実行する暖房運転手段と、冷媒加熱器９の運転中に
上記運転電流検出手段により検出される上記圧縮機の運
転電流が設定電流（通常よりかなり低い値）以下になる
ことを検出した場合に電磁開閉弁11を閉じてガスバーナ
10の燃焼を停止させて冷媒加熱器９の運転を停止させる
手段とを備えている。The control unit 22 performs a heating operation by operating the compressor 1, switching the four-way valve 2, opening the electromagnetic on-off valve 8, and operating the refrigerant heater 9 (combustion of the gas burner 10) in addition to the normal cooling operation control. The heating operation means to be executed and an electromagnetic wave when the operation current of the compressor detected by the operation current detection means during the operation of the refrigerant heater 9 becomes lower than a set current (a considerably lower value than usual). Close on-off valve 11 and burn gas
Means for stopping the combustion of 10 and stopping the operation of the refrigerant heater 9.
つぎに、上記のような構成において第２図を参照しな
がら作用を説明する。Next, the operation of the above configuration will be described with reference to FIG.
操作部（図示しない）で冷房運転の開始操作を行なう
と、制御部22は電磁開閉弁８を閉成した状態で圧縮機１
を起動し、第１図の実線矢印の方向に冷媒を流して冷房
サイクルを形成する。つまり、室外熱交換器３が凝縮
器、室内熱交換器６が蒸発器として働き、室内に冷風が
吹出される。When a cooling operation is started by an operation unit (not shown), the control unit 22 closes the compressor 1 with the electromagnetic on-off valve 8 closed.
Is started, and the refrigerant flows in the direction of the solid arrow in FIG. 1 to form a cooling cycle. That is, the outdoor heat exchanger 3 functions as a condenser, and the indoor heat exchanger 6 functions as an evaporator, and cool air is blown into the room.
操作部（図示しない）で暖房運転の開始操作を行なう
と、制御部22は電磁開閉弁８を開放した状態で圧縮機１
を起動するとともに、四方弁２を切換作動し、さらに冷
媒加熱器９を運転（ガスバーナ10を燃焼）し、第１図の
破線矢印の方向に冷媒を流して暖房サイクルを形成す
る。つまり、室内熱交換器６が凝縮器、冷媒加熱器９が
蒸発器として働き、室内に温風が吹出される。When a heating operation is started by an operation unit (not shown), the control unit 22 controls the compressor 1 with the electromagnetic on-off valve 8 opened.
, The four-way valve 2 is switched, the refrigerant heater 9 is operated (the gas burner 10 is burned), and the refrigerant flows in the direction of the dashed arrow in FIG. 1 to form a heating cycle. That is, the indoor heat exchanger 6 functions as a condenser, and the refrigerant heater 9 functions as an evaporator, so that warm air is blown into the room.
この暖房運転時、制御部22は、操作部（図示しない）
の操作に基づく設定室内温度と室内温度センサ（図示し
ない）の検知温度との差を求め、その差に応じて圧縮機
１の運転周波数を制御する。During the heating operation, the control unit 22 includes an operation unit (not shown)
The difference between the set indoor temperature based on the above operation and the detected temperature of the indoor temperature sensor (not shown) is obtained, and the operating frequency of the compressor 1 is controlled according to the difference.
制御部22はガスバーナ10が燃焼しているか電磁開閉弁
11にオン信号を出力しているかに基づき判断する。そし
て、ガスバーナ10が燃焼していると判断すると、電流検
出部21で検出される圧縮機１の運転電流Icを検出する。
そして、この運転電流Icが設定電流Is以下であることを
検出すると、電磁開閉弁11を閉じて、ガスバーナ９への
燃料の供給を停止する。これにより、冷媒加熱器９の運
転は停止される。The control unit 22 determines whether the gas burner 10 is burning or not.
Judgment is made based on whether an ON signal is output at 11. When it is determined that the gas burner 10 is burning, the operating current Ic of the compressor 1 detected by the current detecting unit 21 is detected.
When it is detected that the operating current Ic is equal to or less than the set current Is, the electromagnetic on-off valve 11 is closed, and the supply of fuel to the gas burner 9 is stopped. Thereby, the operation of the refrigerant heater 9 is stopped.
このように、暖房運転時に冷媒加熱器９が運転されて
いる場合には圧縮機１の運転電流Icを監視し、運転電流
Icが設定電流Is以下になった場合には、ガスバーナ10へ
の燃料の供給を断つようにして、冷媒加熱器９の運転を
停止するようにしたので、たとえ冷媒加熱器９に設けら
れた過熱防止器12が故障していても、冷媒加熱器９の過
熱を確実に防止することができる。As described above, when the refrigerant heater 9 is operated during the heating operation, the operating current Ic of the compressor 1 is monitored, and the operating current Ic is monitored.
When the current Ic becomes equal to or less than the set current Is, the supply of the fuel to the gas burner 10 is stopped to stop the operation of the refrigerant heater 9. Even if the preventer 12 is out of order, overheating of the refrigerant heater 9 can be reliably prevented.
なお、この発明は上記実施例に限定されるものではな
く、要旨を変えない範囲で種々変形実施可能である。The present invention is not limited to the above embodiment, and various modifications can be made without changing the gist.
［発明の効果］ 以上詳述したように本発明によれば、冷媒加熱器を備
えた空気調和機において、冷媒加熱器に設けられた過熱
防止器が正常に動作せず、さらには圧縮機が正常に回ら
ない状態における冷媒加熱器の過熱を防止することがで
きる空気調和機を提供することができる。[Effects of the Invention] As described above in detail, according to the present invention, in an air conditioner provided with a refrigerant heater, the overheat preventer provided in the refrigerant heater does not operate normally, and further, the compressor is An air conditioner capable of preventing overheating of the refrigerant heater in a state where the refrigerant heater does not rotate normally can be provided.
第１図はこの発明の一実施例における冷凍サイクルおよ
び制御回路の構成図、第２図は同実施例の作用を説明す
るためのフローチャート、第３図は従来の空気調和機の
冷凍サイクルの構成図である。 １……圧縮機、２……四方弁、３……室外熱交換器、５
……膨張弁（減圧器）、６……室内熱交換器、8,11……
電磁開閉弁、９……冷媒加熱器、10……ガスバーナ、21
……電流検出部、22……制御部。FIG. 1 is a configuration diagram of a refrigeration cycle and a control circuit in one embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation of the embodiment, and FIG. 3 is a configuration of a refrigeration cycle of a conventional air conditioner. FIG. 1 ... Compressor, 2 ... Four-way valve, 3 ... Outdoor heat exchanger, 5
…… Expansion valve (decompressor), 6 …… Indoor heat exchanger, 8,11 ……
Solenoid on-off valve, 9 refrigerant heater, 10 gas burner, 21
... current detector, 22 ... controller.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F25B 13/00 341 F24F 11/02 102 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) F25B 13/00 341 F24F 11/02 102
Claims (1)
器を順次接続してなる冷凍サイクルを備え、上記冷媒加
熱器の冷媒加熱作用により暖房運転を行なう空気調和機
において、上記圧縮機の運転電流を検出する運転電流検
出手段と、上記冷媒加熱器の運転中に上記運転電流検出
手段により検出される上記圧縮機の運転電流が設定電流
以下になることを検出した場合に上記冷媒加熱器の運転
を停止する手段とを具備したことを特徴とする空気調和
機。An air conditioner having a refrigeration cycle in which a compressor, an indoor heat exchanger, a decompressor, and a refrigerant heater are sequentially connected, and performing a heating operation by a refrigerant heating operation of the refrigerant heater. Operating current detecting means for detecting the operating current of the compressor; and the refrigerant when the operating current of the compressor detected by the operating current detecting means during the operation of the refrigerant heater is less than or equal to a set current. Means for stopping operation of the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2091483A JP3047297B2 (en) | 1990-04-06 | 1990-04-06 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2091483A JP3047297B2 (en) | 1990-04-06 | 1990-04-06 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03291468A JPH03291468A (en) | 1991-12-20 |
| JP3047297B2 true JP3047297B2 (en) | 2000-05-29 |
Family
ID=14027658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2091483A Expired - Fee Related JP3047297B2 (en) | 1990-04-06 | 1990-04-06 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3047297B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04148147A (en) * | 1990-10-05 | 1992-05-21 | Matsushita Electric Ind Co Ltd | Controller for air conditioner with refrigerant heater |
| KR100657500B1 (en) * | 1999-11-23 | 2006-12-19 | 주식회사 엘지이아이 | An apparatus for overheating prevention of heat pump type air conditioner |
-
1990
- 1990-04-06 JP JP2091483A patent/JP3047297B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03291468A (en) | 1991-12-20 |
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