JPH03213940A - Air-conditioner - Google Patents

Air-conditioner

Info

Publication number
JPH03213940A
JPH03213940A JP2008938A JP893890A JPH03213940A JP H03213940 A JPH03213940 A JP H03213940A JP 2008938 A JP2008938 A JP 2008938A JP 893890 A JP893890 A JP 893890A JP H03213940 A JPH03213940 A JP H03213940A
Authority
JP
Japan
Prior art keywords
indoor unit
capacity
compressor
heating
blower
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.)
Granted
Application number
JP2008938A
Other languages
Japanese (ja)
Other versions
JP2777446B2 (en
Inventor
Koji Nagae
公二 永江
Kazutoyo Kagami
一豊 鏡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP2008938A priority Critical patent/JP2777446B2/en
Publication of JPH03213940A publication Critical patent/JPH03213940A/en
Application granted granted Critical
Publication of JP2777446B2 publication Critical patent/JP2777446B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To obtain an air-conditioner which can exhibit a prescribed heating capacity even when some indoor unit conducts a ventilating operation, by a construction wherein the upper limit of the capacity of a compressor is set to be higher than that in the case of no ventilating operation being conducted, when a heating operation is conducted while another indoor unit conducts the ventilating operation. CONSTITUTION:When a blower 16 of an indoor unit D is operated for ventilation as a circulator and a signal of a frequency showing that the blower 16 is operat ed is inputted to a control device 18 from a control device 17, the upper limit of the capacity of a compressor 1 is set to be higher than that in the case when no ventilating operation is conducted in the indoor unit D. Thereby the capacity of a heating operation which an indoor unit B can exhibit is made large, and since this increase in the heating capacity is set to be large quite enough to make up for the lowering of the heating capacity due to a heat loss in the indoor unit D, the indoor unit B can exhibit the prescribed capacity even when there is the heat loss in the indoor unit D.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 この発明は、室外ユニットに複数台の室内ユニットを並
列接続してなるマルチタイプの空気調和機に関するもの
である。
DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a multi-type air conditioner in which a plurality of indoor units are connected in parallel to an outdoor unit.

(ロ)従来の技術 1台の室外ユニットに複数台の室内ユニットを並列に接
続してなるマルチタイプの空気調和機の従来技術として
は、実公昭63−49664号公報に記載されているも
のがある。この空気調和機は、室外ユニットに圧縮機、
室外熱交換器、四方弁とを備え、室内ユニットに室内熱
交換器、送風機とを備えている。
(b) Conventional technology As a conventional technology for a multi-type air conditioner in which multiple indoor units are connected in parallel to one outdoor unit, the one described in Publication of Utility Model Publication No. 63-49664 is known. be. This air conditioner has a compressor in the outdoor unit.
It is equipped with an outdoor heat exchanger and a four-way valve, and the indoor unit is equipped with an indoor heat exchanger and a blower.

(ハ)発明が解決しようとする課題 前述した空気調和機と同種のものにおいて、供給される
周波数により容量の変わる圧縮機を備えたものがあり、
前記圧縮機の容量の上限値は冷房あるいは暖房運転して
いる各室内ユニットからの要求周波数の和で求めている
ものがある0例えば、圧縮機への周波数と冷凍能力が第
2図に示すような関係にある場合には、各運転馬力に相
当する周波数の上限値は、B線のように、室内ユニット
の総運転馬力の小さいものに対して、若干大きめに設定
している。これは、冷房運転時であれば外気温度が高い
、暖房運転時であれば外気温度が低い場合に能力が低下
することを見込んで、これをカバーするためである。
(c) Problems to be Solved by the Invention Among the air conditioners described above, there are some that are equipped with a compressor whose capacity changes depending on the supplied frequency.
The upper limit of the compressor capacity is determined by the sum of the required frequencies from each indoor unit operating for cooling or heating.For example, if the frequency to the compressor and the refrigerating capacity are as shown in Figure 2, In this case, the upper limit value of the frequency corresponding to each operating horsepower is set to be slightly larger than that of the indoor unit having a small total operating horsepower, as shown in line B. This is to compensate for the possibility that the performance will decrease when the outside air temperature is high during cooling operation and when the outside air temperature is low during heating operation.

また、前記周波数の上限値を常に圧縮機における最高の
周波数に設定するという方法もあるが、この方法におい
ては、凝縮温度が高くなったとき作動する保護装置によ
り圧縮機への周波数が強制的に低下させられるだけとな
るため不経済となる。
Another method is to always set the upper limit of the frequency to the highest frequency in the compressor, but in this method, the frequency to the compressor is forced by a protection device that activates when the condensing temperature becomes high. This is uneconomical because it only lowers the amount of electricity.

更にまた、暖房運転時に室内ユニットの総運転馬力によ
って、周波数の上限を一義的にきめると、他に送風運転
〔サーキュレータとして使用〕している室内ユニットが
あった場合、その室内ユニットにわずかながら冷媒が流
れるため熱ロスが生じ、暖房運転側の室内ユニットの暖
房能力が低下してしまう、ひどいときには、暖房能力が
60〜70%にまで低下することがある。暖房運転して
いない室内ユニットに冷媒が流れるのは、室内ユニット
に冷媒が寝込まないように室内ユニットの電子制御弁を
少し開けているためである。
Furthermore, if the upper limit of the frequency is determined uniquely based on the total operating horsepower of the indoor unit during heating operation, if there is another indoor unit that is operating as a blower (used as a circulator), a small amount of refrigerant will be absorbed into that indoor unit. As a result, heat loss occurs and the heating capacity of the indoor unit on the heating operation side decreases. In severe cases, the heating capacity may drop to 60 to 70%. The reason why refrigerant flows into indoor units that are not in heating operation is because the electronic control valve of the indoor unit is slightly opened to prevent refrigerant from getting trapped in the indoor unit.

この発明は、暖房運転時に送風運転している室内ユニッ
トがあった場合でも所定の暖房能力が出せる空気調和機
を提供するものである。
The present invention provides an air conditioner that can produce a predetermined heating capacity even if there is an indoor unit that is blowing air during heating operation.

(ニ)課題を解決するための手段 この発明は、前述した従来技術の課題を解決するために
、容量可変型の圧縮機、室外熱交換器、四方弁を備えた
1台の室外ユニットと、室内熱交換器、送風機を備えた
複数台の室内ユニットとを有している空気調和機におい
て、暖房運転で、かつ、他の室内ユニットが送風運転の
場合には、前記圧縮機の容量の上限を、前記室内ユニッ
トに送風運転がない場合より大きく設定する容量設定装
置を設けたものである。
(d) Means for Solving the Problems In order to solve the problems of the prior art described above, the present invention provides one outdoor unit equipped with a variable capacity compressor, an outdoor heat exchanger, and a four-way valve; In an air conditioner that has multiple indoor units equipped with an indoor heat exchanger and a blower, when the heating operation is in operation and the other indoor units are in the blower operation, the upper limit of the capacity of the compressor. The indoor unit is provided with a capacity setting device that sets the capacity to be larger than when the indoor unit is not in the air blowing operation.

(ネ)作用 この発明による空気調和機においては、暖房運転で、か
つ、他の室内ユニットが送風運転の場合には、容量設定
装置が前記圧縮機の容量の上限を、前記室内ユニットに
送風運転がない場合より大きく設定する。このため、送
風運転している室内ユニットで熱ロスがあっても、圧縮
機の容量が、この熱ロスによる暖房能力低下を補って余
りある程大きめに設定されるので、暖房運転側の室内ユ
ニットでは暖房能力の低下が起こらない。
(f) Function In the air conditioner according to the present invention, when the air conditioner is in the heating operation and another indoor unit is in the blowing operation, the capacity setting device sets the upper limit of the capacity of the compressor to the indoor unit in the blowing operation. Set it larger than if there is no. Therefore, even if there is a heat loss in the indoor unit that is operating the air blower, the capacity of the compressor is set to be large enough to compensate for the decrease in heating capacity due to this heat loss, so the indoor unit that is operating the heating There will be no reduction in heating capacity.

(へ)実施例 この発明の実施例を図面と共に説明する。第1図はこの
発明による空気調和機の冷媒回路図で、この発明の空気
調和機は、1台の室外ユニット(A)と、例えば3台の
室内ユニット(B)(C)(D)とを備えている所謂マ
ルチタイプの空気調和機である。尚、室内ユニット(B
)(C)(D)はそれぞれ2馬力、2馬力、1馬力のも
のを使用している。(1)は供給される周波数によって
容量が変えられる圧縮機、(2)はこの圧縮機の吸入側
に設けられたアキュームレータ、(3)は暖房運転や冷
房運転に応じて冷媒の流路を切換える四方弁、(4)は
室外熱交換器、(5)は減圧装置として働く電動弁、(
6)(7)(8)はそれぞれ室内ユニット(B)に設け
られている室内熱交換器、電動弁、送風機、(9)は電
動弁(7)、送風機(8)の制御や、冷房暖房の運転・
送風運転を示す信号〔要求周波数〕を出力するために、
マイクロコンピュータ等で構成された制御装置、(10
)(11)(12)(13)はそれぞれ室内ユニット(
C)に設けられている室内熱交換器、電動弁、送風機、
制御装置、(14)(15)(16)(17)はそれぞ
れ室内ユニット(B)に設けられている室内熱交換器、
電動弁、送風機、制御装置である。
(F) Embodiment An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a refrigerant circuit diagram of an air conditioner according to the present invention, which includes one outdoor unit (A) and, for example, three indoor units (B), (C), and (D). This is a so-called multi-type air conditioner. In addition, the indoor unit (B
) (C) and (D) are 2 horsepower, 2 horsepower, and 1 horsepower, respectively. (1) is a compressor whose capacity can be changed depending on the supplied frequency, (2) is an accumulator installed on the suction side of this compressor, and (3) is a refrigerant flow path that switches depending on heating or cooling operation. Four-way valve, (4) is an outdoor heat exchanger, (5) is an electric valve that works as a pressure reducing device, (
6) (7) and (8) are the indoor heat exchanger, electric valve, and blower installed in the indoor unit (B), respectively. (9) is the control of the electric valve (7) and blower (8), and the air conditioning and heating. Driving/
In order to output a signal [required frequency] indicating ventilation operation,
A control device consisting of a microcomputer, etc. (10
)(11)(12)(13) are indoor units (
C) Indoor heat exchanger, electric valve, blower,
A control device, (14), (15), (16), and (17) are respectively indoor heat exchangers provided in the indoor unit (B);
These are electric valves, blowers, and control devices.

また、(18〉は暖房運転で、かつ、他の室内ユニット
に送風運転がある〔室内ユニットからの要求周波数があ
る〕場合、圧縮機(1)の上限の周波数を設定するもの
であり、この設定方法は、送風運転の総馬力が1馬力に
つき5Hzの割合で増大させるものである。例えば、送
風運転の総馬力が2馬力の場合は10Hz、送風運転の
総馬力が3馬力の場合は15Hz増大許せて、圧縮機(
1)の上限周波数を設定するものである。
In addition, (18) is used to set the upper limit frequency of the compressor (1) when the heating operation is in progress and another indoor unit is in the ventilation operation (there is a required frequency from the indoor unit). The setting method is to increase the total horsepower of the ventilation operation at a rate of 5Hz for each horsepower.For example, if the total horsepower of the ventilation operation is 2 horsepower, the increase is 10Hz, and if the total horsepower of the ventilation operation is 3 horsepower, the increase is 15Hz. Allow the increase in compressor (
1) is used to set the upper limit frequency.

このように構成された本発明の空気調和機においては、
暖房運転の場合に、四方弁(3)が第1図のように切換
えられて、第1図の実線矢印に示す冷媒流路が形成され
る。
In the air conditioner of the present invention configured in this way,
In the case of heating operation, the four-way valve (3) is switched as shown in FIG. 1, and the refrigerant flow path shown by the solid arrow in FIG. 1 is formed.

今、室内ユニット(B)が暖房運転され、室内ユニット
(C)(D>が運転停止されている場合には、制御装置
り18)は圧縮機(1)への上限の周波数を従来と同じ
周波数に設定する。
Now, when the indoor unit (B) is in heating operation and the indoor units (C) (D> are stopped), the control device 18) sets the upper limit frequency to the compressor (1) at the same level as before. Set to frequency.

しかし、室内ユニッ) (D)の送風機(16)が運転
されている、つまり、室内ユニット(D)がサーキュレ
ータとして使用きれている場合には、この室内ユニット
(D)の制御装置(17)から制御装置(18)に送風
機(16)運転されていることを示す周波数の信号が出
力される。この信号を、制御装置(18)が入力すると
前記圧縮機(1)の容量の上限を、前記室内ユニット(
1)に送風運転がない場合より大きく設定する。このよ
うに、圧縮機(1)の容量が大きく設定されると、室内
ユニット(B)の出せる暖房運転能力が大きくなり、こ
の暖房能力の増大分が、前記室内ユニット(D)での熱
ロスによる暖房能力の低下分を補って余りある程に大き
く設定されているので、室内ユニット(B)は室内ユニ
ット(D)での熱ロスがあっても、所定の能力を出すこ
とができる。
However, when the blower (16) of the indoor unit (D) is operating, that is, when the indoor unit (D) is fully used as a circulator, the control device (17) of this indoor unit (D) A frequency signal indicating that the blower (16) is operating is output to the control device (18). When this signal is input to the control device (18), the upper limit of the capacity of the compressor (1) is set to the indoor unit (
Set higher than when there is no ventilation operation in 1). In this way, when the capacity of the compressor (1) is set large, the heating operation capacity of the indoor unit (B) increases, and this increase in heating capacity reduces the heat loss in the indoor unit (D). Since the indoor unit (B) is set to be large enough to more than compensate for the decrease in heating capacity caused by this, the indoor unit (B) can produce a predetermined capacity even if there is heat loss in the indoor unit (D).

(ト)発明の詳細 な説明したように、本発明の空気調和機によれば、暖房
運転時に他の室内ユニットで送風運転が行われていても
、暖房運転の行われている室内ユニットの暖房能力が低
下しないように圧縮機での容量の上限を室内ユニットの
ない場合より大きく設定する。このため、本発明によれ
ば、暖房運転時に送風運転している室内ユニットがあっ
た場合でも所定の暖房能力が出せる空気調和機を提供す
ることができる。
(g) As described in detail of the invention, according to the air conditioner of the present invention, even if other indoor units are performing air blowing operation during heating operation, the heating operation of the indoor unit that is performing heating operation is Set the upper limit of the capacity of the compressor to be larger than that without an indoor unit so that the capacity does not decrease. Therefore, according to the present invention, it is possible to provide an air conditioner that can produce a predetermined heating capacity even if there is an indoor unit that is operating to blow air during heating operation.

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

第1図はこの発明による空気調和機の冷媒回路図、第2
図は空気調和機における圧縮機への周波数と冷凍能力と
の関係を示す線図である。 (1)・・・圧縮機、 (4)・・・室外熱交換器、 
(6〉・・・室内熱交換器、 (8)・・・送風機、 
(10)・・・室内熱交換器、 (12)・・・送風機
、 (14)・・・室内熱交換器、 (16)・・・送
風機、 (A)・・・室外ユニット、(B)・・・室内
ユニット、 (C)・・・室内ユニット、(D)・・・
室内ユニット。
FIG. 1 is a refrigerant circuit diagram of an air conditioner according to the present invention, and FIG.
The figure is a diagram showing the relationship between the frequency to the compressor and the refrigerating capacity in an air conditioner. (1)...Compressor, (4)...Outdoor heat exchanger,
(6>...Indoor heat exchanger, (8)...Blower,
(10)...Indoor heat exchanger, (12)...Blower, (14)...Indoor heat exchanger, (16)...Blower, (A)...Outdoor unit, (B) ...Indoor unit, (C)...Indoor unit, (D)...
indoor unit.

Claims (1)

【特許請求の範囲】[Claims] (1)容量可変型の圧縮機、室外熱交換器を備えた室外
ユニットと、室内熱交換器、送風機を備えた複数台の室
内ユニットとを有している空気調和機において、暖房運
転の時で、かつ、他の室内ユニットが送風運転の場合に
は、前記圧縮機の容量の上限を、前記室内ユニットに送
風運転がない場合より大きく設定する容量設定装置を有
していることを特徴とする空気調和機。
(1) During heating operation in an air conditioner that has an outdoor unit equipped with a variable capacity compressor and an outdoor heat exchanger, and multiple indoor units equipped with an indoor heat exchanger and a blower. and a capacity setting device that sets the upper limit of the capacity of the compressor to be larger when the other indoor unit is in the blower operation than when the indoor unit is not in the blower operation. air conditioner.
JP2008938A 1990-01-18 1990-01-18 Air conditioner Expired - Fee Related JP2777446B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008938A JP2777446B2 (en) 1990-01-18 1990-01-18 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008938A JP2777446B2 (en) 1990-01-18 1990-01-18 Air conditioner

Publications (2)

Publication Number Publication Date
JPH03213940A true JPH03213940A (en) 1991-09-19
JP2777446B2 JP2777446B2 (en) 1998-07-16

Family

ID=11706612

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008938A Expired - Fee Related JP2777446B2 (en) 1990-01-18 1990-01-18 Air conditioner

Country Status (1)

Country Link
JP (1) JP2777446B2 (en)

Also Published As

Publication number Publication date
JP2777446B2 (en) 1998-07-16

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