JP2661956B2 - Drive control method of compressor with dual power supply - Google Patents
Drive control method of compressor with dual power supplyInfo
- Publication number
- JP2661956B2 JP2661956B2 JP63093660A JP9366088A JP2661956B2 JP 2661956 B2 JP2661956 B2 JP 2661956B2 JP 63093660 A JP63093660 A JP 63093660A JP 9366088 A JP9366088 A JP 9366088A JP 2661956 B2 JP2661956 B2 JP 2661956B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- compressor
- current
- switch
- control device
- 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
Landscapes
- Control Of Ac Motors In General (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、空気調和機における圧縮機の駆動方法に関
するものである。Description: TECHNICAL FIELD The present invention relates to a method for driving a compressor in an air conditioner.
従来の技術 従来、空気調和機を運転する場合、交流電源或は直流
電源単独にて駆動するものが多い。2. Description of the Related Art Conventionally, many air conditioners are driven by an AC power supply or a DC power supply alone.
発明が解決しようとする問題点 ところが、従来のように交流もしくは直流のいずれか
一方の電源により運転される制御は、使用電源が限られ
てしまい、汎用性に欠けるものであった。Problems to be Solved by the Invention However, the conventional control operated by either AC or DC power supply is limited in the power supply to be used and lacks versatility.
又、通常運転時は交流電源とし、非常時の運転に直流
電源を使用するといった場合には適応できない問題があ
る。Further, there is a problem that it cannot be applied to a case where an AC power supply is used during normal operation and a DC power supply is used for emergency operation.
本発明は、空気調和機の駆動電源が、交流及び直流の
２系統存在する場合における圧縮機の駆動方法について
明らかにしようとするものである。The present invention seeks to clarify a method of driving a compressor in a case where there are two AC and DC drive power supplies for an air conditioner.
問題点を解決するための手段 上記問題点を解決するために本発明は、交流電源装置
より電力の供給を受け作動する制御装置と、前記交流電
源装置と直列に接続された第１の開閉器と、交流を直流
に変換する順変換装置と、直流を交流に変換する逆変換
装置と、直流電源装置と前記順変換装置に接続された第
２の開閉器と、前記逆変換装置の直流入力電流を検出す
る電気検出装置と、前記電流が一定値を越えたかどうか
を判断する判断装置と、前記直流電源装置の出力信号に
基づいて、前記制御装置は第１および第２の開閉器のON
の切換を前記両開閉器OFF状態を一定時間介して行い、
交流電源装置或は直流電源装置を選択し、逆変換装置を
介して空気調和機の圧縮機を駆動するとともに、逆変換
装置の直流入力電流が一定値を越えた場合、電流が一定
値以下となるまで逆変換装置の出力周波数を抵下させる
ようにして空気調和機の圧縮機の駆動するものである。Means for Solving the Problems In order to solve the above problems, the present invention provides a control device that receives power from an AC power supply and operates, and a first switch connected in series with the AC power supply. A forward converter for converting alternating current to direct current, a reverse converter for converting direct current to alternating current, a DC power supply and a second switch connected to the forward converter, and a DC input of the reverse converter. An electric detection device for detecting a current, a judgment device for judging whether the current has exceeded a predetermined value, and a control device based on an output signal of the DC power supply, which turns on and off the first and second switches.
Switching between the two switches OFF state for a certain period of time,
Select the AC power supply or DC power supply, drive the compressor of the air conditioner via the inverter, and if the DC input current of the inverter exceeds a certain value, the current will be less than a certain value. The compressor of the air conditioner is driven so that the output frequency of the inverting device is reduced to the extent possible.
作用 本発明によれば、空気調和機の駆動電源が、交流及び
直流の２系統存在する場合でも、駆動電源の切り換えが
円滑に行われ、空気調和機の冷凍サイクルに過大な負荷
が加わることを防止できるものである。Effect According to the present invention, even when the air conditioner has two drive systems, alternating current and direct current, the switching of the drive power is performed smoothly, and an excessive load is applied to the refrigeration cycle of the air conditioner. It can be prevented.
実施例 以下、本発明の一実施例を図面に基づいて説明する。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の基本構成図であり、同図に於て、１
は交流電源装置、２は交流電源装置１を開閉する第１の
開閉器、３は直流電源装置、４は直流電源装置３を開閉
する第２の開閉器である。５は交流を直流に変換する順
変換装置であり、その交流入力側は第１の開閉器２の出
力側に接続され、直流出力は第２の開閉器４の出力側及
び後述する電流検出装置12に接続される。６は直流を交
流に変換する逆変換装置であり、その交流出力側は圧縮
機７に接続される。圧縮機７は、熱交換器８及び９と膨
張弁10に冷媒配管を通じて接続され、圧縮機７の運転に
伴い冷媒が循環し熱交換される。11は制御装置であり、
開閉器等を介さずに直接交流電源装置１に接続され、直
流電源装置３の出力状態に応じて第１の開閉器２、第２
の開閉器４、逆変換装置６を制御する。12は、逆変換装
置６の直流入力電流を検出する電流検出装置であり、そ
の電流が一定値を越えたかどうかを判断する判断装置13
に接続されている。判断装置13の出力は制御装置11に接
続されている。FIG. 1 is a diagram showing the basic configuration of the present invention. In FIG.
Is an AC power supply, 2 is a first switch for opening and closing the AC power supply 1, 3 is a DC power supply, and 4 is a second switch for opening and closing the DC power supply 3. Reference numeral 5 denotes a forward converter for converting AC into DC, the AC input side of which is connected to the output side of the first switch 2, and the DC output of which is connected to the output side of the second switch 4 and a current detection device to be described later. Connected to 12. Reference numeral 6 denotes an inverter for converting DC into AC, and the AC output side thereof is connected to the compressor 7. The compressor 7 is connected to the heat exchangers 8 and 9 and the expansion valve 10 through a refrigerant pipe, and the refrigerant circulates and exchanges heat with the operation of the compressor 7. 11 is a control device,
The first switch 2 and the second switch 2 are connected directly to the AC power supply 1 without the intervention of a switch or the like, depending on the output state of the DC power supply 3.
Of the switch 4 and the inverting device 6 are controlled. Numeral 12 denotes a current detecting device for detecting a DC input current of the inverting device 6, and a judging device 13 for judging whether or not the current has exceeded a certain value.
It is connected to the. The output of the judging device 13 is connected to the control device 11.
これらの様子を第２図タイミングチャートにより説明
する。同図において、まず交流電源装置１が起動し、制
御装置11が作動を開始する。この時点で直流電源装置３
が起動していない場合には、その状態を制御装置11が判
断し、第１の開閉器２をONさせる。第１の開閉器２がON
し、順変換装置５の直流出力電圧が安定した後に、制御
装置11からインバータ駆動信号が送出され、逆変換装置
６を介して圧縮機７に交流電圧が印加され、圧縮機７は
運転される。These situations will be described with reference to the timing chart of FIG. In the figure, first, the AC power supply device 1 is activated, and the control device 11 starts operating. At this point, the DC power supply 3
Is not activated, the control device 11 determines the state and turns on the first switch 2. First switch 2 is ON
After the DC output voltage of the forward converter 5 is stabilized, an inverter drive signal is sent from the control device 11, an AC voltage is applied to the compressor 7 via the inverse converter 6, and the compressor 7 is operated. .
次にこの状態で直流電源装置３が起動すると、この状
態を制御装置11が判断し、インバータ駆動信号の送出を
停止し、圧縮機７の運転を停止させる。その後まず第１
の開閉器２をOFFし、次いで第２の開閉器４をONさせ
る。さらに圧縮機７を一旦停止させた後は、空気調和機
の冷凍サイクルの圧力がバランスするまで一定時間（約
２〜３分間）保持した後に、インバータ駆動信号を送出
し、逆変換装置６を介して圧縮機７の運転を再開させ
る。Next, when the DC power supply 3 is started in this state, the control device 11 determines this state, stops sending the inverter drive signal, and stops the operation of the compressor 7. Then first
Switch 2 is turned off, and then the second switch 4 is turned on. Further, after the compressor 7 is temporarily stopped, the compressor 7 is held for a certain period of time (about 2 to 3 minutes) until the pressure of the refrigeration cycle of the air conditioner is balanced, and then an inverter drive signal is sent out. To restart the operation of the compressor 7.
同様にさらに直流電源装置３が停止すると、その状態
を制御装置11が判断し、インバータ駆動信号の送出を停
止し、圧縮機７の運転を停止させる。その後まず第２の
開閉器４をOFFし、次いで第１の開閉器２をONさせる。
さらに圧縮機７を一旦停止させた後は、空気調和機の冷
凍サイクルの圧力がバランスするまで一定時間（約２〜
３分間）保持した後に、インバータ駆動信号を送出し、
逆変換装置６を介して圧縮機７の運転を再開させる。以
下同様のサイクルを繰り返すものである。Similarly, when the DC power supply device 3 is further stopped, the control device 11 determines the state, stops sending the inverter drive signal, and stops the operation of the compressor 7. Thereafter, first, the second switch 4 is turned off, and then the first switch 2 is turned on.
Further, after the compressor 7 is temporarily stopped, a certain period of time (approximately 2 to 2) is required until the pressure of the refrigeration cycle of the air conditioner is balanced.
3 minutes), then send the inverter drive signal,
The operation of the compressor 7 is restarted via the inverter 6. Hereinafter, the same cycle is repeated.
圧縮機７を運転中、空調負荷が増加した場合には、逆
変換装置６の直流入力電流が増加するもので、この状態
を電流検出装置12で検出し、この電流値が一定値を越え
ると、判断装置13により制御装置11に出力され、その結
果に基づいて制御装置11は、インバータ駆動信号の周波
数を低下させ、圧縮機７の運転回数を低下させることに
より、冷媒循環量を減少させることができ、過負荷状態
での運転を防止することが出来る。If the air-conditioning load increases while the compressor 7 is operating, the DC input current of the inverting device 6 increases. This state is detected by the current detecting device 12, and when this current value exceeds a certain value. Is output to the control device 11 by the determination device 13, and based on the result, the control device 11 reduces the frequency of the inverter drive signal and the number of times the compressor 7 is operated, thereby reducing the refrigerant circulation amount. And operation in an overload state can be prevented.
発明の効果 以上説明したように、本発明の二電源による圧縮機の
駆動制御方法は、空気調和機の駆動電源が、交流及び直
流の２系統存在するシステムにおいて、簡単な構成で電
源の切り換えに際し、開閉器に過大な電流が流れたり又
は過大な電圧が印加されたり、さらに圧縮機に過大な負
荷が加わることを防止することができ、円滑に電源を切
り換えて運転することが出来る効果を奏するものであ
る。Effects of the Invention As described above, the compressor drive control method using the dual power supply of the present invention can be used to switch the power supply with a simple configuration in a system in which the air conditioner has two drive power supplies, AC and DC. It is possible to prevent an excessive current from flowing or an excessive voltage from being applied to the switch, and to prevent an excessive load from being applied to the compressor. Things.
第１図は本発明の一実施例を示す圧縮機の駆動装置の基
本構成図、第２図は同圧縮機の駆動装置の動作を表すタ
イミングチャートである。 １……交流電源装置、２……第１の開閉器、３……直流
電源装置、４……第２の開閉器、５……順変換装置、６
……逆変換装置、７……圧縮機、11……制御装置、12…
…電流検出装置、13……判断装置。FIG. 1 is a basic configuration diagram of a compressor driving device showing an embodiment of the present invention, and FIG. 2 is a timing chart showing an operation of the compressor driving device. DESCRIPTION OF SYMBOLS 1 ... AC power supply device, 2 ... 1st switch, 3 ... DC power supply device, 4 ... 2nd switch, 5 ... Forward conversion device, 6
…… Inverter, 7… Compressor, 11… Controller, 12…
... current detection device, 13 ... judgment device.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−268489（ＪＰ，Ａ) 特開 平１−268491（ＪＰ，Ａ) 特開 平１−268488（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-268489 (JP, A) JP-A-1-268491 (JP, A) JP-A-1-268488 (JP, A)
Claims (1)
力の供給を受け作動する制御装置と、前記交流電源装置
と直列に接構された第１の開閉器と、交流を直流に変換
する順変換装置と、直流を交流に変換する逆変換疲置
と、直流電源装置と、前配直流電源装置と順変換装置の
間に接続された第２の開閉器と、前記逆変換装置の直流
入力側に接続された電流検出装置と、前記電流検出装置
で検出された電流が一定値を越えたかどうかを判断する
判断装置を具備し、前記直流電源装置の出力信号に基づ
いて、第１および第２の開閉器のONの切換を前記両開閉
器OFF状態を一定時間介して行う制御装置を設け、この
制御装置により前記交流電源装置或は前記直流電源装置
を選択し、前記逆変換装置を介して空気調和機の圧縮機
を駆動するとともに、前記逆変換装置の直流入力電流が
一定値を越えた場合、前記電流が一定値以下となるまで
前記逆変換装置の出力周波数を抵下させるようにした二
電源による圧縮機の駆動制御方法。1. An AC power supply, a control device that receives power from the AC power supply and operates, a first switch connected in series with the AC power supply, and converts AC to DC. A forward converter, an inverse converter for converting DC to AC, a DC power supply, a second switch connected between the DC power supply and the converter, and a DC of the inverter. A current detection device connected to the input side, and a determination device for determining whether the current detected by the current detection device has exceeded a certain value, based on an output signal of the DC power supply device, A control device is provided for switching the ON state of the second switch in the OFF state of both switches for a certain period of time, and the control device selects the AC power supply device or the DC power supply device, and controls the inverting device. Drive the compressor of the air conditioner through When the DC input current of Kigyaku converter exceeds a predetermined value, the drive control method of the compressor by the two power supply the current has to be 抵下 the output frequency of the inverters until below a certain value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63093660A JP2661956B2 (en) | 1988-04-15 | 1988-04-15 | Drive control method of compressor with dual power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63093660A JP2661956B2 (en) | 1988-04-15 | 1988-04-15 | Drive control method of compressor with dual power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01268490A JPH01268490A (en) | 1989-10-26 |
| JP2661956B2 true JP2661956B2 (en) | 1997-10-08 |
Family
ID=14088547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63093660A Expired - Lifetime JP2661956B2 (en) | 1988-04-15 | 1988-04-15 | Drive control method of compressor with dual power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2661956B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6336141U (en) * | 1986-08-25 | 1988-03-08 | ||
| JPS6364597A (en) * | 1986-09-02 | 1988-03-23 | Mitsubishi Electric Corp | Inverter air conditioner |
-
1988
- 1988-04-15 JP JP63093660A patent/JP2661956B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01268490A (en) | 1989-10-26 |
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