JPH048699B2 - - Google Patents
Info
- Publication number
- JPH048699B2 JPH048699B2 JP58089726A JP8972683A JPH048699B2 JP H048699 B2 JPH048699 B2 JP H048699B2 JP 58089726 A JP58089726 A JP 58089726A JP 8972683 A JP8972683 A JP 8972683A JP H048699 B2 JPH048699 B2 JP H048699B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- heat exchanger
- outdoor
- compressor
- discharge
- 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 - Lifetime
Links
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Description
【発明の詳細な説明】
産業上の利用分野
本発明は空冷ヒートポンプ式空気調和機におけ
る暖房時の過負荷制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an overload control device during heating in an air-cooled heat pump type air conditioner.
従来例の構成とその問題点
一般に室外熱交換器を空冷式としたいわゆる空
冷ヒートポンプ式空気調和機で、外気温度が高い
ときに暖房運転すると、室外熱交換器における蒸
発能力が大きくなり、室内熱交換器における凝縮
能力とのアンバランスから高圧圧力が高くなり過
ぎる。そのため吐出温度が高くなり過ぎ、電流入
力が大となるなどして不具合が生じる。これをな
くするために高圧圧力調整弁を使用し、吐出出力
が所定の圧力よりも高くなると、前記高圧圧力調
整弁を開にして、低圧側に冷媒をバイパスせしめ
ることで吐出出力を調整したり、あるいは、室外
熱交換器の室外送風機の運転、停止（以下発停と
いう）を行なわしめることで蒸発能力を小さくし
たりして、その対策を施していた。Conventional configurations and their problems In general, in so-called air-cooled heat pump air conditioners in which the outdoor heat exchanger is air-cooled, when heating operation is performed when the outside air temperature is high, the evaporation capacity of the outdoor heat exchanger increases, causing the indoor heat to rise. The high pressure becomes too high due to an imbalance with the condensing capacity in the exchanger. This causes problems such as the discharge temperature becoming too high and the current input becoming large. In order to eliminate this, a high-pressure pressure regulating valve is used, and when the discharge output becomes higher than a predetermined pressure, the high-pressure pressure regulating valve is opened and the refrigerant is bypassed to the low pressure side, thereby adjusting the discharge output. Alternatively, measures have been taken to reduce the evaporation capacity by operating and stopping (hereinafter referred to as starting and stopping) the outdoor blower of the outdoor heat exchanger.
ところがこうした方法は、室外熱交換器におけ
る蒸発能力が大きく変動することによる不必要な
デフロストおよび圧縮機への負担も大きく、か
つ、高圧圧力調整弁も高価であるなどの欠点を有
していた。 However, these methods have the disadvantages that the evaporation capacity in the outdoor heat exchanger fluctuates greatly, resulting in unnecessary defrost and a heavy burden on the compressor, and the high-pressure pressure regulating valve is expensive.
発明の目的
本発明は上記従来の欠点を解消するもので、高
圧圧力調整弁のように高価なものを使用しないよ
うにする。また、室外送風機の発停で蒸発能力の
極端な不足により（停止したときは逆に蒸発能力
は不足する）、今度は不必要なデフロストが行な
われる不具合のないようにすることを目的とす
る。OBJECTS OF THE INVENTION The present invention overcomes the above-mentioned drawbacks of the prior art and avoids the use of expensive components such as high-pressure pressure regulating valves. Another purpose is to prevent unnecessary defrosting from occurring due to an extreme lack of evaporation capacity when the outdoor fan is turned on or off (on the contrary, when it is stopped, the evaporation capacity is insufficient).
発明の構成
前記目的を達成するため、本発明は圧縮機吐出
管に圧力センサーを設け、この圧力センサーの信
号を制御回路により室外送風機の印加電圧を制御
し、前記室外送風機をリニアに制御するようにし
たものである。そして、外気温に応じて室外送風
機の回転数を制御して冷媒回路の圧力を調整する
ものである。Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a pressure sensor in the compressor discharge pipe, and uses a control circuit to control the voltage applied to the outdoor blower based on the signal from the pressure sensor, so as to linearly control the outdoor blower. This is what I did. The pressure in the refrigerant circuit is adjusted by controlling the rotation speed of the outdoor blower according to the outside temperature.
実施例の説明
以下に本発明の実施例を第１図および第２図に
もとづいて説明する。図示のように冷凍回路は圧
縮機１から順次に四方弁２、空冷式の室外熱交換
器３、暖房用膨張弁４、受液器５、液側電磁弁
６、室内機側の冷房膨張弁７、前記弁と並列に接
続した暖房用逆止弁８、室内熱交換器９、ガス側
電磁弁１０、四方弁２、アキユウムレーター１
１、圧縮機１を接続されて構成されている。DESCRIPTION OF EMBODIMENTS Examples of the present invention will be described below with reference to FIGS. 1 and 2. As shown in the figure, the refrigeration circuit starts with a compressor 1, and sequentially includes a four-way valve 2, an air-cooled outdoor heat exchanger 3, a heating expansion valve 4, a liquid receiver 5, a liquid-side solenoid valve 6, and an indoor unit-side cooling expansion valve. 7. A heating check valve 8 connected in parallel with the above valve, an indoor heat exchanger 9, a gas side solenoid valve 10, a four-way valve 2, an accumulator 1
1, a compressor 1 is connected.
前記圧縮機１の吐出管１３にはその圧力を検出
する検出部１２を付設してあり、圧力センサー１
４で感知するようになつている。圧力センサー１
４の信号は電気信号に変換する制御回路１５に与
えられ、電圧印加回路１６を介して室外熱交換器
３用の室外送風機１７の印加電圧を、吐出管１３
の圧力に対応してリニアに制御するようにしてい
る。 The discharge pipe 13 of the compressor 1 is equipped with a detection unit 12 for detecting the pressure thereof, and a pressure sensor 1
It is now possible to detect it at 4. pressure sensor 1
The signal No. 4 is given to a control circuit 15 that converts it into an electric signal, and the applied voltage of the outdoor blower 17 for the outdoor heat exchanger 3 is applied to the discharge pipe 13 via the voltage application circuit 16.
It is designed to be linearly controlled in response to the pressure.
第２図は圧縮機１の吐出管圧力と、室外送風機
１７の印加電圧との関係を示す。50％ラインのＡ
線においては、ほぼ室外送風機が停止になるよう
にモータ設計を行なつている。 FIG. 2 shows the relationship between the discharge pipe pressure of the compressor 1 and the applied voltage of the outdoor blower 17. 50% line A
In the line, the motor is designed so that the outdoor blower almost always stops.
上記構成において、室外送風機印加電圧を第２
図に示すａ点−ｂ点−ｃ点−ｄ点−ｅ点−ｈ点の
ように設定しておくのである。そこで、室外送風
機１７は暖房時、吐出管圧力が低いときには定格
電圧で運転しており、室外温度が高くなると室外
熱交換器３における蒸発能力が大きくなる。これ
を圧力センサー１４が検知し、制御回路１５で電
気信号に変換し、電圧印加回路１６でそのときの
吐出圧力に応じて、Ａ線より上方において無段階
に、かつ、デイフアレンシヤルｆ・ｇの間でリニ
ヤに室外送風機１７を制御するのである。したが
つて、吐出圧力も上昇して、23Kg／cm2のａ点より
室外送風機印加電圧が下降しはじめてｂ点に達す
る。室外送風機１７が運転を停止するｂ点とｃ点
はデフアレンシヤルｇである。吐出圧力が下降し
23Kg／m2になると室外送風機印加電圧は上昇しは
じめてｄ点へ向い、そして回転数が増加する。吐
出圧力が21Kg／cm2に下降すると、再び定格電圧に
なる。また、吐出管圧力が上昇すると、デフアレ
ンシヤルｆをプラスしたａ点に至り、印加電圧も
降下する。このように室外温度が高い間は、室外
送風機１７の回転数が制御され、蒸発能力をリニ
アに制御することにより、吐出圧力、温度を同時
に制御するのである。 In the above configuration, the voltage applied to the outdoor blower is
The points are set as shown in the figure: point a - point b - point c - point d - point e - point h. Therefore, during heating, the outdoor blower 17 operates at the rated voltage when the discharge pipe pressure is low, and when the outdoor temperature increases, the evaporation capacity of the outdoor heat exchanger 3 increases. The pressure sensor 14 detects this, the control circuit 15 converts it into an electric signal, and the voltage application circuit 16 adjusts the differential f. The outdoor blower 17 is linearly controlled between Therefore, the discharge pressure also increases, and the voltage applied to the outdoor blower starts to decrease from point a of 23 kg/cm 2 and reaches point b. Points b and c at which the outdoor blower 17 stops operating are differential g. Discharge pressure decreases
When it reaches 23Kg/m 2 , the voltage applied to the outdoor blower begins to rise, moves toward point d, and the rotational speed increases. When the discharge pressure drops to 21Kg/cm 2 , the voltage returns to the rated voltage. Moreover, when the discharge pipe pressure increases, it reaches point a, which is the value of differential f plus, and the applied voltage also decreases. While the outdoor temperature is high as described above, the rotation speed of the outdoor blower 17 is controlled, and by linearly controlling the evaporation capacity, the discharge pressure and temperature are simultaneously controlled.
発明の効果
前記実施例の説明より明らかなように、本発明
は圧縮機の吐出管に圧力センサーを設け、この圧
力センサーの信号を制御回路に入力し、これによ
り室外送風機の印加電圧を冷媒圧力に応じてリニ
アに制御するようにしたものであるから、室外送
風機における送風量が吐出圧力に応じて圧力セン
サーを介して制御回路で電気信号変換され、さら
に電圧印加回路より吐出圧力に応じた無段階制御
をリニヤに制御し、吐出圧力が過昇しないように
蒸発能力を制御することができ、かつ良好な過負
荷対策となる。さらに、室外送風機の起動時は、
吐出圧力が低い方向（ｅ点−ｄ点間）より始動す
るため、室外送風機のモーターには定格電圧がか
かり、特別な起動補償も不要となり、高圧圧力調
整弁を使用するものに比べてコストも安価にな
り、圧縮機への負担も小さくなるなどの実用的効
果を発揮するものである。Effects of the Invention As is clear from the description of the embodiments described above, the present invention provides a pressure sensor in the discharge pipe of the compressor, inputs the signal of this pressure sensor to the control circuit, and thereby adjusts the voltage applied to the outdoor blower to the refrigerant pressure. Since the airflow rate of the outdoor blower is linearly controlled according to the discharge pressure, the control circuit converts the airflow amount into an electric signal via the pressure sensor according to the discharge pressure, and the voltage application circuit converts the air flow into an electric signal according to the discharge pressure. It is possible to linearly control the stepwise control and to control the evaporation capacity so that the discharge pressure does not rise excessively, and it is a good countermeasure against overload. Furthermore, when starting the outdoor fan,
Since it starts from the direction where the discharge pressure is low (between points e and d), the rated voltage is applied to the outdoor blower motor, no special starting compensation is required, and the cost is lower than those that use a high-pressure pressure regulating valve. It has practical effects such as being cheaper and reducing the burden on the compressor.
第１図は本発明による空冷ヒートポンプ式空気
調和機の冷媒回路上の制御系統図、第２図は本発
明による室外送風機印加電圧と、吐出管圧力との
関係における印加電圧設定例図である。
１３……吐出管、１４……圧力センサー、１５
……制御回路、１６……室外送風機の電圧印加回
路、１７……室外送風機。
FIG. 1 is a control system diagram on a refrigerant circuit of an air-cooled heat pump type air conditioner according to the present invention, and FIG. 2 is a diagram showing an example of applied voltage settings in relation to the outdoor blower applied voltage and discharge pipe pressure according to the present invention. 13...Discharge pipe, 14...Pressure sensor, 15
... Control circuit, 16 ... Voltage application circuit for outdoor blower, 17 ... Outdoor blower.
Claims (1)
内熱交換器を環状に接続し、前記圧縮機からの吐
出管に圧力センサーを設けるとともに、この圧力
センサーの信号により動作し、圧縮機からの吐出
圧力に応じて電気信号に変換する制御回路と、こ
の制御回路より吐出圧力に応じて室外熱交換器を
冷却する室外送風機に電圧をリニヤに出力制御す
る電圧印加回路を備え、前記室外熱交換器での蒸
発能力を前記電圧印加回路からの出力で制御する
ことにより吐出圧力が適切な範囲で運転するよう
にした空冷ヒートポンプ式空気調和機の暖房過負
荷制御装置。1 A compressor, a four-way valve, an air-cooled outdoor heat exchanger, and an indoor heat exchanger are connected in a ring, and a pressure sensor is provided in the discharge pipe from the compressor, and the compressor is operated by the signal of this pressure sensor. A control circuit that converts the discharge pressure from the outdoor heat exchanger into an electric signal according to the discharge pressure, and a voltage application circuit that linearly controls the output voltage from the control circuit to the outdoor blower that cools the outdoor heat exchanger according to the discharge pressure. A heating overload control device for an air-cooled heat pump type air conditioner, which operates within an appropriate range of discharge pressure by controlling the evaporation capacity of the heat exchanger using the output from the voltage application circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58089726A JPS59215559A (en) | 1983-05-20 | 1983-05-20 | Controller for overload of heating of air-cooled heat pump type air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58089726A JPS59215559A (en) | 1983-05-20 | 1983-05-20 | Controller for overload of heating of air-cooled heat pump type air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59215559A JPS59215559A (en) | 1984-12-05 |
| JPH048699B2 true JPH048699B2 (en) | 1992-02-17 |
Family
ID=13978763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58089726A Granted JPS59215559A (en) | 1983-05-20 | 1983-05-20 | Controller for overload of heating of air-cooled heat pump type air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59215559A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0636440Y2 (en) * | 1988-02-10 | 1994-09-21 | 株式会社東芝 | Air conditioner |
| JPWO2017138129A1 (en) * | 2016-02-10 | 2018-09-13 | 三菱電機株式会社 | Air conditioner |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57175407A (en) * | 1981-04-20 | 1982-10-28 | Hitachi Ltd | Controller for heat-pump-type cooler-heater of automobile |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55174553U (en) * | 1979-05-31 | 1980-12-15 |
-
1983
- 1983-05-20 JP JP58089726A patent/JPS59215559A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57175407A (en) * | 1981-04-20 | 1982-10-28 | Hitachi Ltd | Controller for heat-pump-type cooler-heater of automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59215559A (en) | 1984-12-05 |
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