JPH04158171A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH04158171A JPH04158171A JP2285272A JP28527290A JPH04158171A JP H04158171 A JPH04158171 A JP H04158171A JP 2285272 A JP2285272 A JP 2285272A JP 28527290 A JP28527290 A JP 28527290A JP H04158171 A JPH04158171 A JP H04158171A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- compressor
- upper limit
- heat exchanger
- limit value
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 230000007423 decrease Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
- Air Conditioning Control Device (AREA)
Abstract
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係わり、さらに詳しくは、暖房運
転開始時の運転制御に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an air conditioner, and more particularly to operation control at the start of heating operation.
一般にヒートポンプ式の空気調和機において版暖房運転
時に室内温度が上昇すると冷凍サイクルを構成している
圧縮機等の高圧圧力が上昇し、時には、その高圧圧力が
圧縮機等の高圧圧力許容値を越えて過負荷運転状態とな
り、圧縮機等の寿命を縮める恐れがある。Generally, when the indoor temperature of a heat pump type air conditioner rises during heating operation, the high pressure of the compressor, etc. that makes up the refrigeration cycle increases, and sometimes the high pressure exceeds the allowable high pressure value of the compressor, etc. This may lead to overload operation and shorten the life of the compressor, etc.
そこで、従来は前記高圧圧力に対応する室内側熱交換器
の温度を検出し、この温度が予め設定されている温度制
御ゾーンの上限値を越えたら前記圧縮機の回転数を低下
させて高圧圧力の上昇を抑え、過負荷での運転がなされ
ないように制御していた。Therefore, conventionally, the temperature of the indoor heat exchanger corresponding to the high pressure is detected, and when this temperature exceeds the upper limit of the preset temperature control zone, the rotation speed of the compressor is reduced to reduce the high pressure. The system was controlled to suppress the rise in fuel consumption and prevent overloaded operation.
〔発明が解決しようとする課題］
しかしながら、上述のように制御される空気調和機であ
っても、暖房運転の開始時に室温と温度制御ゾーンの上
限値（＝設定温度）との間に大きな差があると、圧縮機
はその温度差に応じて高速運転されるため、冷凍サイク
ルの高圧圧力は第３図に示すように、圧縮機が運転開始
されたｔｏの時点から急上昇する。[Problem to be solved by the invention] However, even with an air conditioner controlled as described above, there is a large difference between the room temperature and the upper limit value of the temperature control zone (= set temperature) at the start of heating operation. If there is, the compressor is operated at high speed according to the temperature difference, so the high pressure of the refrigeration cycle rapidly increases from the time to when the compressor starts operating, as shown in FIG.
一方、室内側熱交換器の温度は前記圧縮機が運転開始さ
れたｔｏの時点では室温とほぼ同じ低い温度になってい
るので、前記圧縮機の運転開始によって高温高圧の冷媒
が室内側熱交換器に流れ始めても伝熱に要する時間の影
響等により、室内側熱交換器の温度上昇は高圧圧力の上
昇よりも遅くなり、前記高圧圧力は室内側熱交換器の温
度が上限値に達する前のｔＩ時点で高圧圧力許容値に達
してしまい、室内側熱交換器の温度が上限値に到達する
までは前記圧縮機の回転数が降下しないため、前記圧縮
機は過負荷状態で運転されることになり、同圧縮機等に
悪影響を及ぼすことになる。On the other hand, since the temperature of the indoor heat exchanger is almost as low as the room temperature at the time to when the compressor starts operating, the high-temperature and high-pressure refrigerant is transferred to the indoor heat exchanger when the compressor starts operating. Even if the flow begins to flow into the chamber, the temperature rise in the indoor heat exchanger will be slower than the rise in high pressure due to the influence of the time required for heat transfer, etc., and the high pressure will rise before the temperature of the indoor heat exchanger reaches the upper limit. The high pressure tolerance value is reached at time tI of , and the rotation speed of the compressor does not decrease until the temperature of the indoor heat exchanger reaches the upper limit value, so the compressor is operated in an overload state. This will have an adverse effect on the compressor, etc.
したがって、本発明においては、これらの課題を解決し
、暖房運転開始時に高圧圧力を必要以上に上昇させるよ
うなことのない空気調和機を提供することを目的として
いる。Therefore, an object of the present invention is to solve these problems and provide an air conditioner that does not cause the high pressure to increase more than necessary when starting heating operation.
本発明は上記の課題を解決するためになされたものであ
り、室内側熱交換器の温度が予め設定されている上限値
を越えたら圧縮機の回転数を降下させ、高圧圧力の上昇
を抑えて前記圧縮機等を保護するようにしてなる空気調
和機において、暖房運転開始から所定時間は前記上限値
を低めに設定するように制御する。The present invention was made to solve the above problem, and when the temperature of the indoor heat exchanger exceeds a preset upper limit, the rotation speed of the compressor is reduced to suppress the rise in high pressure. In an air conditioner configured to protect the compressor, etc., the upper limit value is controlled to be set low for a predetermined period of time from the start of heating operation.
上記の構成であれば、高圧圧力の上昇が室内側熱交換器
の温度上昇よりも先行する暖房運転開始時の所定時間帯
に、圧縮機の回転数を降下させるための基準になる室内
側熱交換器の温度上限値がリモコン等により設定された
上限値（設定温度）よりも低めに設定されるので、前記
圧縮機の回転数を早めに降下させることができ、これに
よって高圧圧力がその許容値を越えるのを防止すること
ができる。With the above configuration, indoor heat becomes the reference for reducing the compressor rotation speed during a predetermined time period at the start of heating operation when the rise in high pressure precedes the rise in temperature of the indoor heat exchanger. Since the upper temperature limit of the exchanger is set lower than the upper limit value (set temperature) set by the remote controller, etc., the rotation speed of the compressor can be lowered early, and this allows the high pressure to reach its allowable level. It is possible to prevent the value from being exceeded.
Ｃ実施例〕
以下、本発明の一実施例を第１図〜第２図に基づいて説
明する。C Embodiment] Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 and 2.
第１図は空気調和機の冷凍サイクルとその制御系を表す
ブロック図で、冷凍サイクルは圧縮機ｌと、冷房運転時
と暖房運転時とで冷媒の流れを切り換える四方弁２と、
室内側熱交換器３と、膨張弁（キャピラリーチューブ）
４と、室外側熱交換器５とにより構成され、制御系は前
記圧縮機１の他、前記室内側熱交換器３および室外側熱
交換器５をそれぞれ空冷するファン６および７等を制御
する主制御部８と、室内側熱交換器３の温度を検出する
ための温度検出センサ９と、室温を検出するために設け
られた温度検出センサ１ｏと、前記主制御部８を制御す
る操作部（リモコン）１１等から成っている。FIG. 1 is a block diagram showing the refrigeration cycle of an air conditioner and its control system. The refrigeration cycle includes a compressor 1, a four-way valve 2 that switches the flow of refrigerant between cooling operation and heating operation.
Indoor heat exchanger 3 and expansion valve (capillary tube)
4 and an outdoor heat exchanger 5, and the control system controls not only the compressor 1 but also fans 6 and 7 that air-cool the indoor heat exchanger 3 and the outdoor heat exchanger 5, respectively. A main control section 8, a temperature detection sensor 9 for detecting the temperature of the indoor heat exchanger 3, a temperature detection sensor 1o provided for detecting the room temperature, and an operation section for controlling the main control section 8. (Remote control) Consists of 11 mags.
前記冷凍サイクルにおいて、暖房運転時に圧縮Ｉｌｌで
加圧された冷媒は実線で表す矢印方向、つまり、四方弁
２、室内側熱交換器３、膨張弁４、室外側熱交換器５、
四方弁２、圧縮機１の順に循環する。In the refrigeration cycle, the refrigerant pressurized by compression Ill during the heating operation is moved in the direction of the arrow shown by the solid line, that is, the four-way valve 2, the indoor heat exchanger 3, the expansion valve 4, the outdoor heat exchanger 5,
It circulates in the order of the four-way valve 2 and the compressor 1.
主制御部８の詳細は図示しないがマイクロコンピュータ
やインバータ等から構成されており、前記圧縮機工の回
転数は温度検出センサ１０によって検出された室内温度
と操作部１１によって設定された設定温度との差に基づ
いて制御され、前記温度検出センサ９により検出された
室内側熱交換器３の温度が予め設定されている上限値（
設定温度）を越えたときには前記圧縮Ｉｌｌの回転数を
降下させるように制御している。Although details of the main control unit 8 are not shown, it is composed of a microcomputer, an inverter, etc., and the rotation speed of the compressor is determined by the difference between the indoor temperature detected by the temperature detection sensor 10 and the set temperature set by the operation unit 11. The temperature of the indoor heat exchanger 3 is controlled based on the difference, and the temperature of the indoor heat exchanger 3 detected by the temperature detection sensor 9 is set to a preset upper limit (
When the temperature exceeds the set temperature, the rotational speed of the compressor Ill is controlled to be lowered.
ところで、本発明では前記上１１１［を第２図に示すよ
うに、暖房運転開始時の所定時間は通常の上限値Ｔ２よ
りも低めの上限値ＴＩを設定するように制御される。By the way, in the present invention, as shown in FIG. 2, the upper limit 111 is controlled to set an upper limit value TI lower than the normal upper limit value T2 for a predetermined time at the start of the heating operation.
第２図に示す横軸の１０は暖房運転の開始時点を表し、
ｔｏｌは暖房運転の初期に設定される低めの上限値Ｔ１
に室内側熱交換器３の温度が達した時点を表し、ｔｌは
前記低めに設定された上限値Ｔ１を解除して通常の上限
値Ｔ２に切り換える時点を表し、ｔ２は前記室内側熱交
換器３の温度が前記通常の上限値Ｔ２を越えた時点を表
し、上部横方向の破線は高圧圧力の許容値を表している
。10 on the horizontal axis shown in FIG. 2 represents the start point of heating operation,
tol is a lower upper limit value T1 set at the beginning of heating operation
tl represents the point in time when the indoor heat exchanger 3 reaches a temperature of 3 represents the point in time when the temperature exceeds the normal upper limit value T2, and the broken line in the upper horizontal direction represents the permissible value of the high pressure.
いま、１００時点で暖房運転が開始されたとすると、ま
ず高圧圧力が上昇し、室内側熱交換器３は温まるのに時
間をようするので、その温度は後れて上昇する。If the heating operation is started at time 100, the high pressure will rise first, and the indoor heat exchanger 3 will take time to warm up, so its temperature will rise later.
ｔｏ１０時点で室内側熱交換器３の温度が上限値Ｔｌを
越えると主制御部８は圧縮ａｌの回転数を所定値だけ降
下させて高圧圧力の上昇を一次的に抑え、高圧圧力がそ
の許容値を越えないようにしている。When the temperature of the indoor heat exchanger 3 exceeds the upper limit value Tl at the time of to10, the main control unit 8 lowers the rotation speed of the compressed aluminum by a predetermined value to temporarily suppress the increase in high pressure, and the high pressure reaches its allowable level. I try not to exceed the value.
室内側熱交換器３はこの間も徐々に温まっていき、ｔｌ
の時点では上限値Ｔ２の近くに達する。The indoor heat exchanger 3 gradually warms up during this time, and tl
At the point in time, it reaches close to the upper limit T2.
上限値ＴＩはこのｔ１時点で本来の上限値Ｔ２に切り換
えられるが、この上限値Ｔ２に切り換えられた時点ｔ１
で、それまでの仮設定されていた上限値Ｔ１と室内側熱
交換器３の温度との関係が逆転し、室内側熱交換器３の
温度よりも上限値Ｔ２が大きくなる。The upper limit value TI is switched to the original upper limit value T2 at this time t1, but at the time t1 when it is switched to this upper limit value T2.
Then, the relationship between the temporarily set upper limit T1 and the temperature of the indoor heat exchanger 3 is reversed, and the upper limit T2 becomes larger than the temperature of the indoor heat exchanger 3.
すると、主制御部８は圧縮機１の運転周波数を上限値Ｔ
２と室内側熱交換器３の温度差に基づいて再び上昇させ
るので、同圧縮機１の回転数は上昇する。Then, the main controller 8 sets the operating frequency of the compressor 1 to the upper limit value T.
Since the rotation speed of the compressor 1 is increased again based on the temperature difference between the compressor 2 and the indoor heat exchanger 3, the rotation speed of the compressor 1 is increased.
この回転数の上昇に伴い、高圧圧力も再び上昇を始め、
室内側熱交換器３の温度は上限値Ｔ２に近づいていく。As the rotation speed increases, the high pressure starts to rise again,
The temperature of the indoor heat exchanger 3 approaches the upper limit value T2.
ｔ２の時点で室内側熱交換器３の温度が上限値Ｔ２を越
えると主制御部８は圧縮器１の回転数を降下させ、室内
側熱交換器３の温度を温度制御ゾーン内に戻すよう制御
するとともに、高圧圧力が高圧圧力許容値を越えないよ
うに制御している。When the temperature of the indoor heat exchanger 3 exceeds the upper limit value T2 at time t2, the main controller 8 lowers the rotation speed of the compressor 1 to return the temperature of the indoor heat exchanger 3 to within the temperature control zone. At the same time, the high pressure is controlled so that it does not exceed the high pressure tolerance.
このように、暖房運転開始時より所定時間、設定温度の
上限値を通常運転時よりも低めに設定させることにより
、圧縮機１等の過負荷運転を防止することができる。In this way, by setting the upper limit of the set temperature to be lower than during normal operation for a predetermined period of time from the start of heating operation, overload operation of the compressor 1 and the like can be prevented.
以上、説明したような空気調和機であるならば、高圧圧
力の上昇が室内側熱交換器の温度上昇よりも先行する暖
房運転開始時の所定時間帯に、圧縮機の回転数を降下さ
せるための基準になる室内側熱交換器の温度上限値がリ
モコンにより設定された設定温度よりも低めに設定され
るので、高圧圧力がその許容値を越える前に圧縮機の回
転数を降下させ、高圧圧力の上昇を防止することができ
、したがって、圧縮機の過負荷運転の防止になり、寿命
の低下防止と信顛性向上が期待できる。In the case of an air conditioner as explained above, the rotation speed of the compressor is reduced during a predetermined time period at the start of heating operation when the rise in high pressure precedes the rise in temperature of the indoor heat exchanger. The upper temperature limit of the indoor heat exchanger, which is the standard for It is possible to prevent an increase in pressure, thereby preventing overload operation of the compressor, thereby preventing a decrease in service life and improving reliability.
第１図は本発明の一実施例を示す空気調和機の冷凍サイ
クルとその制御系を表すブロック図、第２図は同実施例
における制御の様子を表す図、第３図は従来の制御の様
子を表す図である。
図中、１−圧縮機、２−四方弁、３−室内側熱交換器、
４−１１張弁（キャピラリーチューブ）、５−室外側熱
交換器、６．７−ファン、８−主制御部、９．ＩＯ−温
度検出センサ、Ｉ １−操作部（リモコン）。
特許出願人 株式会社冨士通ゼネラル第１図
第２図Fig. 1 is a block diagram showing the refrigeration cycle of an air conditioner and its control system showing one embodiment of the present invention, Fig. 2 is a diagram showing the state of control in the same embodiment, and Fig. 3 is a diagram showing the conventional control system. FIG. In the figure, 1-compressor, 2-four-way valve, 3-indoor heat exchanger,
4-11 tension valve (capillary tube), 5-outdoor heat exchanger, 6.7-fan, 8-main control section, 9. IO-Temperature detection sensor, I1-Operation unit (remote control). Patent applicant Fujitsu General Co., Ltd. Figure 1 Figure 2
Claims (1)
えたら圧縮機の回転数を降下させ、高圧圧力の上昇を抑
えて前記圧縮機等を保護するようにしてなる空気調和機
において、暖房運転開始から所定時間は前記上限値を低
めに設定するように制御してなることを特徴とする空気
調和機。In an air conditioner that reduces the rotation speed of the compressor when the temperature of the indoor heat exchanger exceeds a preset upper limit value, suppresses a rise in high pressure and protects the compressor, etc., An air conditioner characterized in that the upper limit value is controlled to be set low for a predetermined period of time from the start of heating operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2285272A JPH04158171A (en) | 1990-10-23 | 1990-10-23 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2285272A JPH04158171A (en) | 1990-10-23 | 1990-10-23 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04158171A true JPH04158171A (en) | 1992-06-01 |
Family
ID=17689359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2285272A Pending JPH04158171A (en) | 1990-10-23 | 1990-10-23 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04158171A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001063185A1 (en) * | 2000-02-25 | 2001-08-30 | Zexel Valeo Climate Control Corporation | Refrigerating cycle |
| JP2015222136A (en) * | 2014-05-22 | 2015-12-10 | 株式会社富士通ゼネラル | Air conditioner |
| JP2017083145A (en) * | 2015-10-30 | 2017-05-18 | ダイキン工業株式会社 | Air conditioner |
-
1990
- 1990-10-23 JP JP2285272A patent/JPH04158171A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001063185A1 (en) * | 2000-02-25 | 2001-08-30 | Zexel Valeo Climate Control Corporation | Refrigerating cycle |
| JP2015222136A (en) * | 2014-05-22 | 2015-12-10 | 株式会社富士通ゼネラル | Air conditioner |
| JP2017083145A (en) * | 2015-10-30 | 2017-05-18 | ダイキン工業株式会社 | Air conditioner |
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