JP2000274780A - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JP2000274780A JP2000274780A JP11075315A JP7531599A JP2000274780A JP 2000274780 A JP2000274780 A JP 2000274780A JP 11075315 A JP11075315 A JP 11075315A JP 7531599 A JP7531599 A JP 7531599A JP 2000274780 A JP2000274780 A JP 2000274780A
- Authority
- JP
- Japan
- Prior art keywords
- outdoor
- solenoid valve
- temperature
- temperature sensor
- 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.)
- Pending
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空気調和機に係わ
り、室外機の冷媒回路の構成と制御に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner and, more particularly, to a configuration and control of a refrigerant circuit of an outdoor unit.
【０００２】[0002]
【従来の技術】図６は、従来の一例を示す空気調和機の
冷媒回路図、図７は、従来の他の例を示す空気調和機の
冷媒回路図である。従来の空気調和機の冷媒回路は、図
に示すように、室外機１に収納された圧縮機２と、四方
弁３と、室外熱交換器５と、室内機１０に収納された絞
り装置６と、室内熱交換器１１とからなり、順次配管接
続されて冷媒回路が構成されている。2. Description of the Related Art FIG. 6 is a refrigerant circuit diagram of an air conditioner showing one example of the prior art, and FIG. 7 is a refrigerant circuit diagram of an air conditioner showing another example of the related art. As shown in the figure, a refrigerant circuit of a conventional air conditioner includes a compressor 2 housed in an outdoor unit 1, a four-way valve 3, an outdoor heat exchanger 5, and a throttle device 6 housed in an indoor unit 10. And an indoor heat exchanger 11, which are sequentially connected to form a refrigerant circuit.
【０００３】以上の構成において、冷房運転時には、冷
媒流路は破線の矢印のとおり、室外機１の冷媒は、圧縮
機２、四方弁３を経て２パスの室外熱交換器５に向か
う。該冷媒は室外熱交換器３から、絞り装置６を経て前
記室内機１０の室内熱交換器１１に流入する。そして、
該冷媒は、前記室外機１の四方弁３を経て圧縮機２に戻
る。また、暖房運転時には、冷媒流路は実線の矢印のと
おり、冷房時と逆の経路を絞り装置６を経て圧縮機２に
戻る。In the above configuration, during the cooling operation, the refrigerant flow in the outdoor unit 1 passes through the compressor 2 and the four-way valve 3 to the two-pass outdoor heat exchanger 5 as indicated by a broken line arrow. The refrigerant flows from the outdoor heat exchanger 3 via the expansion device 6 into the indoor heat exchanger 11 of the indoor unit 10. And
The refrigerant returns to the compressor 2 via the four-way valve 3 of the outdoor unit 1. Further, during the heating operation, the refrigerant flow path returns to the compressor 2 via the expansion device 6 along a path opposite to that during the cooling as indicated by a solid arrow.
【０００４】ところで、暖房時に前記室外機１の除霜を
行うには、図３に示すように、前記四方弁３を切換え、
冷房サイクルとすることにより行うリバース方式と、図
４に示すように、前記圧縮機２からの吐出ガスをバイパ
ス管７、電磁弁８ａを介して、前記室外熱交換器５の前
記絞り装置６側の一端５ａに注入するホットガスバイパ
ス方式がある。しかしながら、前記いずれの方法でも、
高温の吐出ガスを除霜開始から終了まで霜の溶け具合に
関わらず同じ箇所から注入するため、注入箇所付近はす
ぐに霜が溶けるが、出口付近の霜を溶かすために、既に
霜が溶けた前記注入口に前記吐出ガスを注入し続けなく
てはならず、連続暖房運転を行えず放熱による損失増大
と除霜時間が長くなるおそれがある問題点があった。In order to defrost the outdoor unit 1 during heating, the four-way valve 3 is switched as shown in FIG.
As shown in FIG. 4, a reverse method performed by using a cooling cycle, and a discharge gas from the compressor 2 is supplied to the outdoor heat exchanger 5 via the bypass pipe 7 and the solenoid valve 8 a on the side of the throttle device 6 of the outdoor heat exchanger 5. There is a hot gas bypass system in which one end 5a is injected. However, in any of the above methods,
High-temperature discharge gas is injected from the same point from the start to the end of the defrost regardless of the degree of frost melting, so the frost immediately melts near the injection point, but the frost has already melted to melt the frost near the outlet There has been a problem that the discharge gas must be continuously injected into the injection port, a continuous heating operation cannot be performed, a loss due to heat dissipation increases, and a defrosting time may be prolonged.
【０００５】[0005]
【発明が解決しようとする課題】本発明においては、前
記問題点に鑑み、室外機の除霜時に、放熱のロスを削減
し、暖房運転を行いながら除霜時間を短縮した空気調和
機を提供することを目的としている。SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an air conditioner in which the loss of heat radiation is reduced when the outdoor unit is defrosted, and the defrosting time is shortened while performing the heating operation. It is intended to be.
【０００６】[0006]
【課題を解決するための手段】本発明は上記の課題を解
決するためになされたもので、圧縮機と、四方弁と、２
パスを有する室外熱交換器と、絞り装置と、室内熱交換
器とからなり、これらを冷媒配管により順次配管接続し
て冷媒回路を構成するとともに、前記四方弁を切換える
ことにより前記室外熱交換器の除霜を行う空気調和機に
おいて、前記室外熱交換器の各パスと前記絞り装置の間
に各々第一電磁弁と、第二電磁弁を配設するとともに、
室外機に室外温度センサを配設し、同室外温度センサの
検出温度が設定温度を超えたときに、前記第一電磁弁ま
たは第二電磁弁を選択的に閉状態に制御して暖房運転を
行ないながら除霜を行ない、設定温度を超えないときは
通常の除霜運転を行うようにしてなるようにする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a compressor, a four-way valve, and a compressor.
An outdoor heat exchanger having a path, a throttle device, and an indoor heat exchanger. These are sequentially connected by a refrigerant pipe to form a refrigerant circuit, and the outdoor heat exchanger is switched by switching the four-way valve. In an air conditioner that performs defrosting, each of the first solenoid valve and the second solenoid valve are disposed between each path of the outdoor heat exchanger and the expansion device,
An outdoor temperature sensor is disposed in the outdoor unit, and when the detected temperature of the outdoor temperature sensor exceeds a set temperature, the first solenoid valve or the second solenoid valve is selectively controlled to a closed state to perform a heating operation. Defrosting is performed while performing, and when the set temperature is not exceeded, normal defrosting operation is performed.
【０００７】そして、前記室外熱交換器の前記四方弁側
の各パス近傍に各々第一温度センサ、第二温度センサを
配設し、前記室外温度センサの検出温度が設定温度を超
えたときに、前記第一電磁弁を閉状態、第二電磁弁を開
状態にし、前記室外温度センサの検出温度と前記第一温
度センサの検出温度との差が設定温度値より小さくなっ
たときに、前記第一電磁弁を開状態、第二電磁弁を閉状
態にし、室外温度センサの検出温度と前記第二温度セン
サの検出温度との差が設定温度値より小さくなったとき
に、前記第二電磁弁を開状態、第一電磁弁を開状態に制
御してなるようにする。[0007] A first temperature sensor and a second temperature sensor are provided near each of the four-way valve-side paths of the outdoor heat exchanger, respectively, when the detected temperature of the outdoor temperature sensor exceeds a set temperature. When the first solenoid valve is closed, the second solenoid valve is opened, and when the difference between the temperature detected by the outdoor temperature sensor and the temperature detected by the first temperature sensor is smaller than a set temperature value, The first solenoid valve is opened, the second solenoid valve is closed, and when the difference between the temperature detected by the outdoor temperature sensor and the temperature detected by the second temperature sensor becomes smaller than a set temperature value, the second electromagnetic valve is closed. The valve is controlled to be open and the first solenoid valve is controlled to be open.
【０００８】あるいは、前記室外温度センサの検出温度
が設定温度を超えたときに、前記第一電磁弁を閉状態、
第二電磁弁を開状態にし、所定時間を過ぎれば、前記第
一電磁弁を開状態、第二電磁弁を閉状態にし、次いで、
再び前記所定時間を過ぎれば、前記第二電磁弁を開状
態、第一電磁弁を開状態に制御してなるようにする。そ
して、前記所定時間を、前記室外温度センサの検出温度
が高ければ短く、低ければ長くするように制御してなる
ようにする。Alternatively, when the temperature detected by the outdoor temperature sensor exceeds a set temperature, the first solenoid valve is closed,
Open the second solenoid valve, after a predetermined time, open the first solenoid valve, close the second solenoid valve, then,
After the predetermined time has passed again, the second solenoid valve is opened and the first solenoid valve is opened. Then, the predetermined time is controlled so as to be shorter when the temperature detected by the outdoor temperature sensor is higher, and to be longer when the temperature detected is lower.
【０００９】さらに、前記室外温度センサの検出温度が
設定温度を超えたときに、室外ファンの回転数を高くし
てなるようにする。Further, when the temperature detected by the outdoor temperature sensor exceeds a set temperature, the rotation speed of the outdoor fan is increased.
【００１０】[0010]
【発明の実施の形態】以下、発明の実施の形態を実施例
に基づき添付図面を参照して詳細に説明する。図１は、
本発明の一実施例を示す空気調和機の冷媒回路図、図２
は本発明の一実施例を示す空気調和機の要部説明図、図
３は、本発明の一実施例を示す空気調和機のフローチャ
ートである。なお、構成品の番号は同じものについては
同一の番号を使用する。図において、１は室外機、２は
圧縮機、３は四方弁、４ａは第一温度センサ、４ｂは第
二温度センサ、４ｚは室外温度センサ、５は室外熱交換
器、５ａ、５ｂはパス、６は絞り装置、９ａは第一電磁
弁、９ｂは第二電磁弁、１０は室内機、１１は室内熱交
換器、２０は室外ファン、２１は室外機制御部、２２は
室内機制御部、２３は入力部、２４は記憶部である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on embodiments with reference to the accompanying drawings. FIG.
FIG. 2 is a refrigerant circuit diagram of an air conditioner showing one embodiment of the present invention.
FIG. 3 is an explanatory view of a main part of an air conditioner showing one embodiment of the present invention, and FIG. 3 is a flowchart of the air conditioner showing one embodiment of the present invention. The same numbers are used for the same components. In the figure, 1 is an outdoor unit, 2 is a compressor, 3 is a four-way valve, 4a is a first temperature sensor, 4b is a second temperature sensor, 4z is an outdoor temperature sensor, 5 is an outdoor heat exchanger, 5a and 5b are paths. , 6 is a throttle device, 9a is a first solenoid valve, 9b is a second solenoid valve, 10 is an indoor unit, 11 is an indoor heat exchanger, 20 is an outdoor fan, 21 is an outdoor unit control unit, and 22 is an indoor unit control unit. , 23 are input units, and 24 is a storage unit.
【００１１】この空気調和機は、室外機１と室内機１０
とから構成されるとともに、圧縮機２と、四方弁３と、
２パス５ａ、５ｂを有する室外熱交換器５と、絞り装置
６と、室内熱交換器１１とからなり、これらを冷媒配管
により順次配管接続して冷媒回路を構成している。それ
とともに、室外機１に室外機制御部２１、室内機１０に
室内機制御部１１を配設し、前記四方弁３を切換えるこ
とにより室外熱交換器５の通常の除霜を行う。ここで、
本発明の空気調和機は、連続暖房運転を行いながら除霜
をするために、前記室外熱交換器５の各パス５ａ、５ｂ
と前記絞り装置６の間に各々第一電磁弁９ａと、第二電
磁弁９ｂを配設するとともに、前記室外機１に室外温度
センサ４ｚを配設している。また、前記室外熱交換器５
の前記四方弁３側の各パス５ａ、５ｂ近傍に各々第一温
度センサ４ａ、第二温度センサ４ｂを配設する。さら
に、室内機制御部２２は、入力部２３からの設定値など
のデ−タ入力を受け付け、記憶部２４に記憶させる一
方、室外機制御部２１は室内機制御部２２と互いに通信
してデ−タ交換を行うとともに、前記室外機１の動作を
制御する。This air conditioner comprises an outdoor unit 1 and an indoor unit 10.
And a compressor 2, a four-way valve 3,
It comprises an outdoor heat exchanger 5 having two paths 5a, 5b, a throttle device 6, and an indoor heat exchanger 11, and these are sequentially connected by refrigerant piping to form a refrigerant circuit. At the same time, the outdoor unit 1 is provided with the outdoor unit control unit 21 and the indoor unit 10 is provided with the indoor unit control unit 11, and the four-way valve 3 is switched to perform normal defrosting of the outdoor heat exchanger 5. here,
The air conditioner of the present invention performs each of the passes 5a and 5b of the outdoor heat exchanger 5 to perform defrosting while performing the continuous heating operation.
A first solenoid valve 9a and a second solenoid valve 9b are arranged between the throttle unit 6 and the outdoor unit 1, respectively, and an outdoor temperature sensor 4z is arranged in the outdoor unit 1. In addition, the outdoor heat exchanger 5
A first temperature sensor 4a and a second temperature sensor 4b are disposed near the respective paths 5a and 5b on the four-way valve 3 side. Further, the indoor unit control unit 22 receives data input such as set values from the input unit 23 and stores it in the storage unit 24, while the outdoor unit control unit 21 communicates with the indoor unit control unit 22 to transmit data. And the operation of the outdoor unit 1 is controlled.
【００１２】そして、図３に示すように、前記室外温度
センサ４ｚの検出温度が設定温度を超えたかどうか判断
し（ＳＴ１）、Ｙｅｓであれば、室外ファン２０の回転
数を高くし（ＳＴ２）、前記第一電磁弁９ａを閉状態、
第二電磁弁９ｂを開状態にする。（ＳＴ３）一方、ＳＴ
１でＮｏであれば、通常の除霜を行う。（ＳＴ０）ま
た、前記室外温度センサ４ｚの検出温度と前記第一温度
センサ４ａの検出温度との差が設定温度値より小さくな
ったかどうか判断し（ＳＴ４）、Ｙｅｓであれば、前記
第一電磁弁９ａを開状態、第二電磁弁９ｂを閉状態にす
る。（ＳＴ５）一方、ＳＴ４でＮｏであれば、ＳＴ４に
戻る。Then, as shown in FIG. 3, it is determined whether or not the detected temperature of the outdoor temperature sensor 4z has exceeded a set temperature (ST1). If Yes, the rotational speed of the outdoor fan 20 is increased (ST2). Closing the first solenoid valve 9a,
The second solenoid valve 9b is opened. (ST3) On the other hand, ST
If No in 1, normal defrost is performed. (ST0) Also, it is determined whether or not the difference between the detected temperature of the outdoor temperature sensor 4z and the detected temperature of the first temperature sensor 4a is smaller than a set temperature value (ST4). The valve 9a is opened and the second solenoid valve 9b is closed. (ST5) On the other hand, if No in ST4, the process returns to ST4.
【００１３】次いで、室外温度センサ４ｚの検出温度と
前記第二温度センサ９ｂの検出温度との差が設定温度値
より小さくなったかどうか判断し（ＳＴ６）、Ｙｅｓで
あれば、前記第二電磁弁９ｂを開状態、第一電磁弁９ａ
を開状態に制御している。（ＳＴ７）一方、ＳＴ６でＮ
ｏであれば、ＳＴ６に戻る。Next, it is determined whether or not the difference between the temperature detected by the outdoor temperature sensor 4z and the temperature detected by the second temperature sensor 9b is smaller than a set temperature value (ST6). 9b is open, the first solenoid valve 9a
Is controlled to the open state. (ST7) On the other hand, at ST6, N
If it is o, the process returns to ST6.
【００１４】以上の構成において、次に本発明の実施例
の作用、効果について説明する。この実施例によれば、
前記第一電磁弁９ａを閉状態にしたときに、前記室外熱
交換器５の前記四方弁３側のパス５ａに冷媒が流れず、
室外ファン２０の回転数を高くしているので除霜が短時
間で行われる。そして、この除霜が行われているパス５
ａに対して他方のパス５ｂは、冷媒が流れており連続暖
房運転が可能となる。また、前記第二電磁弁９ｂを閉状
態にしたときに、前記室外熱交換器５の前記四方弁３側
のパス５ｂに冷媒が流れず、室外ファン２０の回転数を
高くしているので除霜が短時間で行われる。同様に、こ
の除霜が行われているパス５ｂに対して他方のパス５ａ
は、冷媒が流れており連続暖房運転が可能となる。Next, the operation and effect of the embodiment of the present invention having the above configuration will be described. According to this embodiment,
When the first solenoid valve 9a is closed, the refrigerant does not flow through the path 5a of the outdoor heat exchanger 5 on the four-way valve 3 side,
Since the rotation speed of the outdoor fan 20 is increased, defrosting is performed in a short time. And pass 5 where this defrost is performed
In the other path 5b with respect to a, the refrigerant flows and continuous heating operation is enabled. Further, when the second solenoid valve 9b is closed, the refrigerant does not flow through the path 5b of the outdoor heat exchanger 5 on the side of the four-way valve 3 and the rotation speed of the outdoor fan 20 is increased, so Frost occurs in a short time. Similarly, the path 5b on which the defrosting is performed is different from the path 5a on the other side.
, The refrigerant is flowing and continuous heating operation is possible.
【００１５】図４は、本発明の他の実施例を示す空気調
和機の要部説明図、図５は、本発明の他の実施例を示す
空気調和機のフローチャートである。この実施例の場
合、前記室外機制御部２１に所定時間を設定する。そし
て、前記室外温度センサ４ｚの検出温度が設定温度を超
えたかどうか判断し（ＳＴ１）、Ｙｅｓであれば、室外
ファン２０の回転数を高くし（ＳＴ２）、前記第一電磁
弁９ａを閉状態、第二電磁弁９ｂを開状態にする。（Ｓ
Ｔ３）一方、ＳＴ１でＮｏであれば、通常の除霜を行
う。（ＳＴ０）また、ＳＴ３からの経過時間が前記所定
時間を過ぎたかどうか判断し（ＳＴ４）、Ｙｅｓであれ
ば、前記第一電磁弁９ａを開状態、第二電磁弁９ｂを閉
状態にする。（ＳＴ５）一方、ＳＴ４でＮｏであれば、
ＳＴ４に戻る。FIG. 4 is an explanatory view of a main part of an air conditioner showing another embodiment of the present invention, and FIG. 5 is a flowchart of the air conditioner showing another embodiment of the present invention. In the case of this embodiment, a predetermined time is set in the outdoor unit control unit 21. Then, it is determined whether or not the detected temperature of the outdoor temperature sensor 4z has exceeded the set temperature (ST1). If Yes, the rotation speed of the outdoor fan 20 is increased (ST2), and the first solenoid valve 9a is closed. Then, the second solenoid valve 9b is opened. (S
T3) On the other hand, if No in ST1, normal defrost is performed. (ST0) Also, it is determined whether the elapsed time from ST3 has passed the predetermined time (ST4), and if Yes, the first solenoid valve 9a is opened and the second solenoid valve 9b is closed. (ST5) On the other hand, if No in ST4,
Return to ST4.
【００１６】次いで、再びＳＴ５からの経過時間が前記
所定時間を過ぎたかどうか判断し（ＳＴ６）、Ｙｅｓで
あれば、前記第二電磁弁９ｂを開状態、第一電磁弁９ａ
を開状態に制御している。（ＳＴ７）一方、ＳＴ６でＮ
ｏであれば、ＳＴ６に戻る。そして、前記所定時間を、
前記室外温度センサ４ｚの検出温度が高ければ短く、低
ければ長くするように制御している。Next, it is again determined whether or not the elapsed time from ST5 has passed the predetermined time (ST6). If Yes, the second solenoid valve 9b is opened and the first solenoid valve 9a is opened.
Is controlled to the open state. (ST7) On the other hand, at ST6, N
If it is o, the process returns to ST6. And, the predetermined time is:
The control is performed such that the detection temperature of the outdoor temperature sensor 4z is short if it is high, and is long if it is low.
【００１７】以上の構成において、次に本発明の他の実
施例の作用、効果について説明する。この実施例によれ
ば、上述の実施例と同様に、前記第一電磁弁９ａを閉状
態にしたときに、前記室外熱交換器５の前記四方弁３側
のパス５ａに冷媒が流れず、室外ファン２０の回転数を
高くしているので除霜が短時間で行われる。そして、こ
の除霜が行われているパス５ａに対して他方のパス５ｂ
は、冷媒が流れており連続暖房運転が可能となる。Next, the operation and effect of the other embodiment of the present invention will be described. According to this embodiment, similar to the above-described embodiment, when the first solenoid valve 9a is closed, the refrigerant does not flow through the path 5a on the four-way valve 3 side of the outdoor heat exchanger 5, Since the rotation speed of the outdoor fan 20 is increased, defrosting is performed in a short time. Then, the other path 5b is connected to the path 5a where the defrosting is performed.
, The refrigerant is flowing and continuous heating operation is possible.
【００１８】また、前記第二電磁弁９ｂを閉状態にした
ときに、前記室外熱交換器５の前記四方弁３側のパス５
ｂに冷媒が流れず、室外ファン２０の回転数を高くして
いるので除霜が短時間で行われる。同様に、この除霜が
行われているパス５ｂに対して他方のパス５ａは、冷媒
が流れており連続暖房運転が可能となる。さらに、前記
室外機制御部２１による所定時間を、前記室外温度セン
サ４ｚの検出温度が高ければ短く、低ければ長くするよ
うに制御しているので、外気温に応じてより適切な除霜
が行える。When the second solenoid valve 9b is closed, the path 5 of the outdoor heat exchanger 5 on the side of the four-way valve 3 is closed.
Since the refrigerant does not flow in b and the rotation speed of the outdoor fan 20 is increased, defrosting is performed in a short time. Similarly, the other path 5a, on which the defrosting is being performed, flows in the other path 5a, so that the continuous heating operation can be performed. Further, since the predetermined time by the outdoor unit controller 21 is controlled to be shorter when the temperature detected by the outdoor temperature sensor 4z is higher and longer when the temperature detected by the outdoor temperature sensor 4z is lower, more appropriate defrosting can be performed in accordance with the outdoor temperature. .
【００１９】[0019]
【発明の効果】以上のように本発明によれば、圧縮機
と、四方弁と、２パスを有する室外熱交換器と、絞り装
置と、室内熱交換器とからなり、これらを冷媒配管によ
り順次配管接続して冷媒回路を構成するとともに、前記
四方弁を切換えることにより前記室外熱交換器の除霜を
行う空気調和機において、前記室外熱交換器の各パスと
前記絞り装置の間に各々第一電磁弁と、第二電磁弁を配
設するとともに、室外機に室外温度センサを配設し、前
記室外温度センサの検出温度が設定温度を超えたとき
に、前記第一電磁弁または第二電磁弁を選択的に閉状態
に制御して暖房運転を行ないながら除霜を行ない、設定
温度を超えないときは通常の除霜運転を行うようにして
なるようにした。As described above, according to the present invention, a compressor, a four-way valve, an outdoor heat exchanger having two passes, a throttling device, and an indoor heat exchanger are connected by refrigerant piping. In the air conditioner performing the defrosting of the outdoor heat exchanger by switching the four-way valve while sequentially connecting pipes to form a refrigerant circuit, each of the paths of the outdoor heat exchanger and the throttle device are respectively provided. A first solenoid valve and a second solenoid valve are disposed, and an outdoor temperature sensor is disposed in the outdoor unit, and when the detected temperature of the outdoor temperature sensor exceeds a set temperature, the first solenoid valve or the second The defrosting is performed while performing the heating operation by selectively controlling the two solenoid valves to the closed state, and the normal defrosting operation is performed when the set temperature is not exceeded.
【００２０】この結果、連続暖房運転を行いながら放熱
のロスを削減し、除霜時間を短縮し、低温暖房能力及び
快適性の向上を図った空気調和機の室外機を提供するこ
とができる。As a result, it is possible to provide an outdoor unit of an air conditioner in which loss of heat radiation is reduced while continuous heating operation is performed, defrosting time is shortened, and low-temperature heating capacity and comfort are improved.
【図１】本発明の一実施例を示す空気調和機の冷媒回路
図である。FIG. 1 is a refrigerant circuit diagram of an air conditioner showing one embodiment of the present invention.
【図２】本発明の一実施例を示す空気調和機の要部説明
図である。FIG. 2 is an explanatory view of a main part of an air conditioner showing one embodiment of the present invention.
【図３】本発明の一実施例を示す空気調和機のフローチ
ャートである。FIG. 3 is a flowchart of the air conditioner showing one embodiment of the present invention.
【図４】本発明の他の実施例を示す空気調和機の要部説
明図である。FIG. 4 is an explanatory view of a main part of an air conditioner showing another embodiment of the present invention.
【図５】本発明の他の実施例を示す空気調和機のフロー
チャートである。FIG. 5 is a flowchart of an air conditioner showing another embodiment of the present invention.
【図６】従来の一例を示す空気調和機の冷媒回路図であ
る。FIG. 6 is a refrigerant circuit diagram of an air conditioner showing an example of the related art.
【図７】従来の他の例を示す空気調和機の冷媒回路図で
ある。FIG. 7 is a refrigerant circuit diagram of an air conditioner showing another conventional example.
１ 室外機 ２ 圧縮機 ３ 四方弁 ４ａ 第一温度センサ ４ｂ 第二温度センサ ４ｚ 室外温度センサ ５ 室外熱交換器 ５ａ パス ５ｂ パス ６ 絞り装置 ９ａ 第一電磁弁 ９ｂ 第二電磁弁 １０ 室内機 １１ 室内熱交換器 ２０ 室外ファン ２１ 室外機制御部 ２２ 室内機制御部 ２３ 入力部 ２４ 記憶部 REFERENCE SIGNS LIST 1 outdoor unit 2 compressor 3 four-way valve 4a first temperature sensor 4b second temperature sensor 4z outdoor temperature sensor 5 outdoor heat exchanger 5a pass 5b pass 6 expansion device 9a first solenoid valve 9b second solenoid valve 10 indoor unit 11 indoor Heat exchanger 20 Outdoor fan 21 Outdoor unit control unit 22 Indoor unit control unit 23 Input unit 24 Storage unit
Claims (5)
外熱交換器と、絞り装置と、室内熱交換器とからなり、
これらを冷媒配管により順次配管接続して冷媒回路を構
成するとともに、前記四方弁を切換えることにより前記
室外熱交換器の除霜を行う空気調和機において、 前記室外熱交換器の各パスと前記絞り装置の間に各々第
一電磁弁と、第二電磁弁を配設するとともに、室外機に
室外温度センサを配設し、 同室外温度センサの検出温度が設定温度を超えたとき
に、前記第一電磁弁または第二電磁弁を選択的に閉状態
に制御して暖房運転を行ないながら除霜を行ない、設定
温度を超えないときは通常の除霜運転を行うようにして
なることを特徴とする空気調和機。1. An air conditioner comprising a compressor, a four-way valve, an outdoor heat exchanger having two passes, a throttle device, and an indoor heat exchanger.
In an air conditioner that sequentially connects these with a refrigerant pipe to form a refrigerant circuit and switches the four-way valve to defrost the outdoor heat exchanger, each path of the outdoor heat exchanger and the throttle A first solenoid valve and a second solenoid valve are disposed between the devices, and an outdoor temperature sensor is disposed in the outdoor unit. When the detected temperature of the outdoor temperature sensor exceeds a set temperature, the second Defrosting is performed while performing the heating operation by selectively controlling the one solenoid valve or the second solenoid valve to the closed state, and when the set temperature is not exceeded, the normal defrosting operation is performed. Air conditioner.
ス近傍に各々第一温度センサ、第二温度センサを配設
し、 前記室外温度センサの検出温度が設定温度を超えたとき
に、前記第一電磁弁を閉状態、第二電磁弁を開状態に
し、 前記室外温度センサの検出温度と前記第一温度センサの
検出温度との差が設定温度値より小さくなったときに、
前記第一電磁弁を開状態、第二電磁弁を閉状態にし、 室外温度センサの検出温度と前記第二温度センサの検出
温度との差が設定温度値より小さくなったときに、前記
第二電磁弁を開状態、第一電磁弁を開状態に制御してな
ることを特徴とする請求項１記載の空気調和機。2. A first temperature sensor and a second temperature sensor are respectively disposed near each of the four-way valve-side paths of the outdoor heat exchanger, and when a temperature detected by the outdoor temperature sensor exceeds a set temperature. When the first solenoid valve is closed and the second solenoid valve is opened, when the difference between the temperature detected by the outdoor temperature sensor and the temperature detected by the first temperature sensor is smaller than a set temperature value,
The first solenoid valve is opened, the second solenoid valve is closed, and when the difference between the detected temperature of the outdoor temperature sensor and the detected temperature of the second temperature sensor is smaller than a set temperature value, the second The air conditioner according to claim 1, wherein the electromagnetic valve is controlled to be in an open state and the first electromagnetic valve is controlled to be in an open state.
度を超えたときに、前記第一電磁弁を閉状態、第二電磁
弁を開状態にし、 所定時間を過ぎれば、前記第一電磁弁を開状態、第二電
磁弁を閉状態にし、 次いで、再び前記所定時間を過ぎれば、前記第二電磁弁
を開状態、第一電磁弁を開状態に制御してなることを特
徴とする請求項１記載の空気調和機。3. When the temperature detected by the outdoor temperature sensor exceeds a set temperature, the first solenoid valve is closed and the second solenoid valve is opened, and after a predetermined time, the first solenoid valve is opened. Open state, close the second solenoid valve, and then, after the predetermined time has passed again, the second solenoid valve is opened, the first solenoid valve is controlled to open state, characterized by the following: Item 7. The air conditioner according to Item 1.
検出温度が高ければ短く、低ければ長くするように制御
してなることを特徴とする請求項３記載の空気調和機。4. The air conditioner according to claim 3, wherein the predetermined time is controlled so as to be shorter when the temperature detected by the outdoor temperature sensor is higher, and to be longer when the temperature detected by the outdoor temperature sensor is lower.
度を超えたときに、室外ファンの回転数を高くしてなる
ことを特徴とする請求項１乃至請求項４記載の空気調和
機。5. The air conditioner according to claim 1, wherein when the temperature detected by the outdoor temperature sensor exceeds a set temperature, the rotation speed of the outdoor fan is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11075315A JP2000274780A (en) | 1999-03-19 | 1999-03-19 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11075315A JP2000274780A (en) | 1999-03-19 | 1999-03-19 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000274780A true JP2000274780A (en) | 2000-10-06 |
Family
ID=13572714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11075315A Pending JP2000274780A (en) | 1999-03-19 | 1999-03-19 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000274780A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100676308B1 (en) | 2005-03-04 | 2007-02-01 | 류재식 | A defrost protection circuit of heat pump |
| WO2013001976A1 (en) | 2011-06-28 | 2013-01-03 | ダイキン工業株式会社 | Air conditioner |
| WO2015083392A1 (en) * | 2013-12-04 | 2015-06-11 | 三菱電機株式会社 | Heat pump device |
| CN106642405A (en) * | 2016-11-02 | 2017-05-10 | 珠海格力电器股份有限公司 | Air conditioner outdoor unit, air conditioner and defrosting control method of air conditioner outdoor unit |
-
1999
- 1999-03-19 JP JP11075315A patent/JP2000274780A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100676308B1 (en) | 2005-03-04 | 2007-02-01 | 류재식 | A defrost protection circuit of heat pump |
| WO2013001976A1 (en) | 2011-06-28 | 2013-01-03 | ダイキン工業株式会社 | Air conditioner |
| WO2015083392A1 (en) * | 2013-12-04 | 2015-06-11 | 三菱電機株式会社 | Heat pump device |
| CN106642405A (en) * | 2016-11-02 | 2017-05-10 | 珠海格力电器股份有限公司 | Air conditioner outdoor unit, air conditioner and defrosting control method of air conditioner outdoor unit |
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