JPH04366341A - air conditioner - Google Patents
air conditionerInfo
- Publication number
- JPH04366341A JPH04366341A JP3141884A JP14188491A JPH04366341A JP H04366341 A JPH04366341 A JP H04366341A JP 3141884 A JP3141884 A JP 3141884A JP 14188491 A JP14188491 A JP 14188491A JP H04366341 A JPH04366341 A JP H04366341A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- expansion valve
- electric expansion
- bypass path
- valve
- 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
Links
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、正サイクルデフロスト
回路を備えた空気調和装置に係り、特に除霜運転中にお
ける暖房能力の向上対策に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner equipped with a positive cycle defrost circuit, and more particularly to measures for improving heating capacity during defrosting operation.
【０００２】0002
【従来の技術】従来より、例えば特開昭６４―３３４８
０号公報に開示される如く、圧縮機、室内熱交換器、減
圧機構及び室外熱交換器を順次接続してなる冷媒回路を
備えた空気調和装置において、吐出管から室外熱交換器
の液管にホットガスをバイパスするホットガスバイパス
路を開閉弁を介して設けるとともに、減圧機構の減圧抵
抗値をホットガスバイパス路の開閉弁の開閉に連動して
可変に構成しておき、暖房運転中のデフロスト指令時、
上記開閉弁を開いて、吐出冷媒を室内熱交換器側とホッ
トガスバイパス路側とに分岐して流通させることにより
、室内の暖房を行いながら室外熱交換器の着霜を融解し
ようとするものは公知の技術である。[Prior Art] Conventionally, for example, Japanese Patent Application Laid-Open No. 64-3348
As disclosed in Publication No. 0, in an air conditioner equipped with a refrigerant circuit in which a compressor, an indoor heat exchanger, a pressure reduction mechanism, and an outdoor heat exchanger are sequentially connected, a liquid pipe of an outdoor heat exchanger is connected from a discharge pipe to a liquid pipe of an outdoor heat exchanger. A hot gas bypass path is provided via an on-off valve to bypass the hot gas, and the pressure reducing resistance value of the pressure reducing mechanism is configured to be variable in conjunction with the opening and closing of the on-off valve of the hot gas bypass path. When commanding defrost,
The system that attempts to melt the frost on the outdoor heat exchanger while heating the room by opening the above-mentioned on-off valve and branching the discharged refrigerant to the indoor heat exchanger side and the hot gas bypass path side. This is a known technique.
【０００３】また、例えば特開平１―２０８６７８号公
報に開示される如く、圧縮機、室内熱交換器、膨張弁及
び室外熱交換器を順次接続してなる冷媒回路を備えた空
気調和装置において、吐出管から室外熱交換器の液管に
ホットガスをバイパスするホットガスバイパス路を開閉
弁を介して設けるとともに、室内熱交換器−膨張弁間の
液管と吸入管とを接続する暖房用バイパス路を設けてお
き、室外熱交換器の着霜時にはホットガスバイパス路の
開閉弁を開いて除霜運転を行う一方で、暖房用バイパス
路の開閉弁を開いて膨張弁を閉じることにより、室内熱
交換器に冷媒を流通させて室内の暖房を行うようにした
ものも公知の技術である。[0003] Furthermore, as disclosed in, for example, Japanese Unexamined Patent Publication No. 1-208678, an air conditioner equipped with a refrigerant circuit in which a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger are sequentially connected, A hot gas bypass path is provided via an on-off valve to bypass hot gas from the discharge pipe to the liquid pipe of the outdoor heat exchanger, and a heating bypass is provided to connect the liquid pipe between the indoor heat exchanger and the expansion valve with the suction pipe. When frost builds up on the outdoor heat exchanger, the hot gas bypass valve is opened to perform defrosting operation, while the heating bypass valve is opened and the expansion valve is closed to cool the indoor heat exchanger. It is also a known technique to heat a room by circulating a refrigerant through a heat exchanger.
【０００４】0004
【発明が解決しようとする課題】しかしながら、上記従
来のもののうち前者では、室外熱交換器の除霜運転を行
うときには常に室内熱交換器側にも冷媒を流通させなけ
ればならない構造となっており、減圧機構によって除霜
能力と暖房能力との比が一定に決定されるために、除霜
に要する時間が長く掛かる虞れがある一方、室内側の暖
房要求も十分満たされない虞れがある。[Problem to be Solved by the Invention] However, the former of the above conventional systems has a structure in which the refrigerant must always flow to the indoor heat exchanger side when defrosting the outdoor heat exchanger. Since the ratio between the defrosting capacity and the heating capacity is fixed by the pressure reduction mechanism, there is a risk that the time required for defrosting will be long, and there is also a risk that the indoor heating requirement will not be fully satisfied.
【０００５】一方、上記従来のもののうち後者では、除
霜運転だけを行うことが可能であるが、除霜運転と暖房
運転とを同時に行うときに除霜能力と暖房能力との比は
除霜用バイパス路と暖房用バイパス路の管路抵抗の比で
定まり、実際の必要能力に応じて調節しうる構成になっ
ていないという問題があった。On the other hand, in the latter of the above-mentioned conventional systems, it is possible to perform only defrosting operation, but when performing defrosting operation and heating operation at the same time, the ratio of defrosting capacity to heating capacity is This is determined by the ratio of the pipe resistance between the heating bypass line and the heating bypass line, and there is a problem in that it cannot be adjusted according to the actual required capacity.
【０００６】本発明は、一般に除霜運転の開始直後には
室内側では予熱があるためにそれほど冷媒量を必要とし
ない一方、室外熱交換器側の温度がある程度上昇してい
ったん融解されるとその後はそれほど除霜能力を要求さ
れないように、除霜の進行に応じて室外熱交換器と室内
熱交換器とで必要な能力が変化することに鑑み、除霜能
力と暖房能力との比を調節しうる構造とすることにより
、除霜運転時間を過大にすることなく空調の快適性の向
上を図ることにある。[0006] In the present invention, the amount of refrigerant is generally not required immediately after the start of defrosting operation because the indoor side is preheated, but once the temperature on the outdoor heat exchanger side rises to a certain extent and the refrigerant is melted. After that, the ratio of defrosting capacity and heating capacity should be adjusted so that the required capacity of the outdoor heat exchanger and the indoor heat exchanger changes as defrosting progresses so that the defrosting capacity is not required as much. By providing an adjustable structure, the objective is to improve the comfort of air conditioning without increasing the defrosting operation time.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
、請求項１の発明の講じた手段は、図１に示すように（
破線部分を除く）、圧縮機（１）と、室外熱交換器（３
）と、電動膨張弁（４）と、室内ファン（５ａ）を付設
した室内熱交換器（５）とを順次接続してなる主冷媒回
路（７）を備えた空気調和装置を前提とする。[Means for Solving the Problems] In order to achieve the above object, the means taken by the invention of claim 1 are as shown in FIG.
(excluding the dashed line), compressor (1), and outdoor heat exchanger (3)
), an electric expansion valve (4), and an indoor heat exchanger (5) equipped with an indoor fan (5a) are connected in sequence to form a main refrigerant circuit (7).
【０００８】そして、空気調和装置に、上記主冷媒回路
（７）の吐出管（６ａ）の一部位（Ｐ）と室外熱交換器
（３）−膨張弁（４）間の液管の一部位（Ｑ）とをバイ
パス接続する第１バイパス路（１０）と、該第１バイパ
ス路（１０）の管路を開閉する開閉弁（１１）と、上記
主冷媒回路（７）の第１バイパス路（１０）との接続部
（Ｑ）−電動膨張弁（４）間の液管と圧縮機（１）の吸
入管（６ｂ）とをバイパス接続する第２バイパス路（２
０）と、上記電動膨張弁（４）側の冷媒の流れを室外熱
交換器（３）側と第２バイパス路（２０）側とに切換え
る切換手段（２１）とを設ける構成としたものである。[0008] The air conditioner includes a portion (P) of the discharge pipe (6a) of the main refrigerant circuit (7) and a portion of the liquid pipe between the outdoor heat exchanger (3) and the expansion valve (4). (Q), a first bypass path (10) that bypass-connects the first bypass path (10), an on-off valve (11) that opens and closes the pipeline of the first bypass path (10), and a first bypass path of the main refrigerant circuit (7). (10) - the second bypass path (2
0) and a switching means (21) for switching the flow of refrigerant on the electric expansion valve (4) side to the outdoor heat exchanger (3) side and the second bypass path (20) side. be.
【０００９】請求項２の発明の講じた手段は、図１の破
線部分に示すように、請求項１の発明において、空気調
和装置の暖房運転時、第１バイパス路（１０）の開閉弁
（１１）を閉じ、切換手段（２１）により室内熱交換器
（５）からの冷媒を室外熱交換器（３）に流通させるよ
う制御する暖房運転制御手段（３１）と、暖房運転中の
除霜運転指令時、上記第１バイパス路（１０）の開閉弁
（１１）を開き、電動膨張弁（４）を閉じて、室内ファ
ン（５ａ）の風量を低風量に制御する開始制御手段（３
２）と、上記室内熱交換器（５）の吹出空気の温度を検
出する吹出温度検出手段（Ｔｈｕ）と、該吹出温度検出
手段（Ｔｈｕ） の出力を受け、上記開始制御手段（３
２）による除霜運転の開始後、室内熱交換器（５）の吹
出空気の温度が第１設定温度以下になると、電動膨張弁
（４）を一定開度に開くよう制御する第１暖房能力増大
手段（３３）と、該第１暖房能力増大手段（３３）によ
る暖房能力の増大後、上記吹出温度検出手段（Ｔｈｕ）
で検出される室内熱交換器（５）の吹出空気の温度が上
記第１設定温度よりも低い第２設定温度以下になると、
上記切換手段（２１）により電動膨張弁（４）下流側の
冷媒の流れを第２バイパス路（２０）側に切換えて、電
動膨張弁（４）の開度を負荷に応じて調節するよう制御
する第２暖房能力増大手段（３４）とを設けたものであ
る。The means taken by the invention of claim 2 is that, in the invention of claim 1, the on-off valve ( heating operation control means (31) for controlling the refrigerant from the indoor heat exchanger (5) to flow through the outdoor heat exchanger (3) by the switching means (21); At the time of an operation command, a start control means (3) opens the on-off valve (11) of the first bypass path (10), closes the electric expansion valve (4), and controls the air volume of the indoor fan (5a) to a low air volume.
2), a blowout temperature detection means (Thu) for detecting the temperature of the air blown from the indoor heat exchanger (5), and a start control means (3) which receives the output of the blowout temperature detection means (Thu).
After the start of the defrosting operation according to step 2), when the temperature of the air blown from the indoor heat exchanger (5) becomes equal to or lower than the first set temperature, the first heating capacity controls the electric expansion valve (4) to open to a constant opening degree. After the heating capacity is increased by the increasing means (33) and the first heating capacity increasing means (33), the blowing temperature detecting means (Thu)
When the temperature of the air blown from the indoor heat exchanger (5) detected by the temperature drops below the second set temperature, which is lower than the first set temperature,
The switching means (21) switches the flow of refrigerant downstream of the electric expansion valve (4) to the second bypass path (20), and controls the opening degree of the electric expansion valve (4) to be adjusted according to the load. A second heating capacity increasing means (34) is provided.
【００１０】0010
【作用】以上の構成により、請求項１の発明では、暖房
運転中における室外熱交換器（３）の着霜時、開閉弁（
１１）を開くことにより室外熱交換器（３）に吐出冷媒
を導入して室外熱交換器（３）の着霜を融解するいわゆ
る正サイクルによる除霜運転が可能であるとともに、切
換手段（２１）の切換えにより電動膨張弁（４）下流側
の冷媒を第２バイパス路（２０）側にバイパスさせるこ
とにより、圧縮機（１）からの吐出冷媒が点（Ｐ）で第
１バイパス路（１０）−室外熱交換器（３）を経由する
サイクルと、室内熱交換器（５）−第２バイパス路（２
０）を経由するサイクルとの独立した２つのサイクルに
分離され、除霜と暖房とを同時に行うことが可能になる
。[Function] With the above configuration, in the invention of claim 1, when the outdoor heat exchanger (3) is frosted during heating operation, the on-off valve (
By opening the switching means (21), the discharge refrigerant is introduced into the outdoor heat exchanger (3) to melt the frost on the outdoor heat exchanger (3). ), the refrigerant on the downstream side of the electric expansion valve (4) is bypassed to the second bypass path (20), so that the refrigerant discharged from the compressor (1) flows into the first bypass path (10) at point (P). )-outdoor heat exchanger (3), and indoor heat exchanger (5)-second bypass path (2
It is separated into two independent cycles, the cycle passing through step 0), and it becomes possible to perform defrosting and heating at the same time.
【００１１】そのとき、電動膨張弁（４）の下流側から
第２バイパス路（２０）が分岐しているので、電動膨張
弁（４）の開度調節により、除霜能力と暖房能力との比
の調節が可能となり、暖房運転中の室内の予熱の状態や
室外熱交換器（３）の着霜の融解の進行に応じて、適切
な能力分配を行うことが可能となる。At this time, since the second bypass path (20) branches from the downstream side of the electric expansion valve (4), defrosting capacity and heating capacity can be adjusted by adjusting the opening degree of the electric expansion valve (4). It becomes possible to adjust the ratio, and it becomes possible to perform appropriate capacity distribution according to the state of indoor preheating during heating operation and the progress of melting of frost on the outdoor heat exchanger (3).
【００１２】請求項２の発明では、暖房制御手段（３１
）による暖房運転中、除霜指令に応じて除霜運転を開始
する時には、開始制御手段（３２）により、電動膨張弁
（４）を閉じ開閉弁（１１）が開かれるので、圧縮機（
１）からの吐出冷媒がすべて室外熱交換器（３）に導入
され、室外熱交換器（３）の着霜が速やかに融解される
。このとき、室内ファン（５ａ）が低風量で運転される
ので、室内熱交換器（５）の予熱により室内の暖房が継
続され、空調の快適性が維持される。In the invention of claim 2, the heating control means (31
) During the heating operation by the compressor (
All of the refrigerant discharged from 1) is introduced into the outdoor heat exchanger (3), and frost on the outdoor heat exchanger (3) is quickly melted. At this time, since the indoor fan (5a) is operated at a low air volume, heating of the room continues by preheating the indoor heat exchanger (5), and the comfort of the air conditioning is maintained.
【００１３】そして、吹出温度検出手段（Ｔｈｕ）で検
出される室内熱交換器（５）の吹出空気温度が第１設定
温度以下になると、第１暖房能力増大手段（３３）によ
り、電動膨張弁（４）が一定開度まで開かれるので、室
内熱交換器（５）側に吐出冷媒が流れて室内の暖房が行
われて、吹出空気温度の低下が抑制され、空調の快適性
が維持される。[0013] When the temperature of the blowing air from the indoor heat exchanger (5) detected by the blowing temperature detecting means (Thu) becomes equal to or lower than the first set temperature, the first heating capacity increasing means (33) activates the electric expansion valve. (4) is opened to a certain degree, the discharged refrigerant flows to the indoor heat exchanger (5), heating the room, suppressing the drop in the temperature of the blown air, and maintaining the comfort of the air conditioning. Ru.
【００１４】さらに、その後、吹出空気温度が第１設定
温度よりも低い第２設定温度以下になると、第２暖房能
力増大手段（３４）により、切換手段（２１）が第２バ
イパス路（２０）側に切換えられるとともに、電動膨張
弁（４）の開度が負荷に応じて調節され、室内熱交換器
（５）への冷媒流量が増大して、室内の暖房が確保され
る。すなわち、吐出冷媒が第１バイパス路（１０）−室
外熱交換器（３）を経由するサイクルと室内熱交換器（
５）−第２バイパス路（２０）を経由するサイクルの２
つの独立したサイクルで運転が行われ、室外熱交換器（
３）の除霜が停止することなく進行すると同時に室内熱
交換器（５）の暖房能力が増大し、除霜運転時間が過大
になることなく、空調の快適性が向上することになる。[0014]Furthermore, after that, when the temperature of the blown air becomes equal to or lower than the second set temperature, which is lower than the first set temperature, the second heating capacity increasing means (34) causes the switching means (21) to switch to the second bypass path (20). At the same time, the opening degree of the electric expansion valve (4) is adjusted according to the load, the flow rate of refrigerant to the indoor heat exchanger (5) is increased, and indoor heating is ensured. That is, a cycle in which the discharged refrigerant passes through the first bypass path (10) and the outdoor heat exchanger (3), and a cycle in which the discharged refrigerant passes through the first bypass path (10) and the outdoor heat exchanger (3), and the indoor heat exchanger (
5) - 2 of the cycles via the second bypass (20)
Operation takes place in two independent cycles, and the outdoor heat exchanger (
As the defrosting in 3) progresses without stopping, the heating capacity of the indoor heat exchanger (5) increases, and the defrosting operation time does not become excessive, improving the comfort of air conditioning.
【００１５】[0015]
【実施例】以下、本発明の実施例について、図２以下の
図面に基づき説明する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIG. 2 and subsequent drawings.
【００１６】図２は本発明の実施例に係る空気調和装置
の冷媒配管系統を示し、空気調和装置には、インバ―タ
（図示せず）により運転周波数が可変に調節される圧縮
機（１）と、暖房運転時には図中実線のごとく冷房運転
時には図中破線のごとく切換わる四路切換弁（２）と、
室外ファン（３ａ）を付設し、暖房運転時には蒸発器と
して冷房運転時には凝縮器として機能する室外熱交換器
（３）と、電動膨張弁（４）と、室内ファン（５ａ）を
付設し、暖房運転時には凝縮器として冷房運転時には蒸
発器として機能する室内熱交換器（５）とを冷媒配管（
６）で順次接続してなる主冷媒回路（７）が設けられて
いる。FIG. 2 shows a refrigerant piping system of an air conditioner according to an embodiment of the present invention. ), and a four-way switching valve (2) that switches as shown in the solid line in the figure during heating operation and as shown in the broken line in the figure during cooling operation,
It is equipped with an outdoor fan (3a), an outdoor heat exchanger (3) that functions as an evaporator during heating operation and a condenser during cooling operation, an electric expansion valve (4), and an indoor fan (5a). The indoor heat exchanger (5), which functions as a condenser during operation and as an evaporator during cooling operation, is connected to the refrigerant piping (
A main refrigerant circuit (7) is provided which is connected in sequence at 6).
【００１７】そして、上記主冷媒回路（７）の吐出管（
６ａ）の一部位（Ｐ）と室外熱交換器（３）−電動膨張
弁（４）間の液管の一部位（Ｑ）との間には、吐出冷媒
を直接室外熱交換器（３）に導入するための第１バイパ
ス路（１０）が常閉の開閉弁（１１）を介して設けられ
ていて、室外熱交換器（３）の着霜時には開閉弁（１１
）を開いて吐出冷媒を直接室外熱交換器（３）に導入す
ることにより、室外熱交換器（３）の着霜を融解しうる
ようになされている。さらに、上記第１バイパス路（１
０）と主冷媒回路（７）との合流部位（Ｑ）−電動膨張
弁（４）間の液管と吸入管（６ｂ）とをバイパス接続す
る第２バイパス路（２０）が設けられており、該第２バ
イパス路（２０）と主冷媒回路（７）との接続部には、
電動膨張弁（４）下流側の冷媒の流れを室外熱交換器（
３）側と第２バイパス路（２０）側とに切換える切換手
段としての三方弁（２１）が設けられている。[0017]Then, the discharge pipe (
Between the part (P) of 6a) and the part (Q) of the liquid pipe between the outdoor heat exchanger (3) and the electric expansion valve (4), the discharged refrigerant is directly connected to the outdoor heat exchanger (3). A first bypass path (10) is provided through a normally closed on-off valve (11), and the on-off valve (11) is closed when frost forms on the outdoor heat exchanger (3).
) is opened to directly introduce the discharged refrigerant into the outdoor heat exchanger (3), thereby melting frost on the outdoor heat exchanger (3). Furthermore, the first bypass path (1
0) and the main refrigerant circuit (7) - a second bypass path (20) is provided to bypass connect the liquid pipe between the electric expansion valve (4) and the suction pipe (6b). , the connection part between the second bypass path (20) and the main refrigerant circuit (7),
The flow of refrigerant downstream of the electric expansion valve (4) is transferred to the outdoor heat exchanger (
A three-way valve (21) is provided as a switching means for switching between the 3) side and the second bypass path (20) side.
【００１８】すなわち、通常暖房運転時には、三方弁（
２１）を室外熱交換器（３）側に切換えて電動膨張弁（
４）下流側の冷媒を室外熱交換器（３）に流通させる一
方、必要に応じて三方弁（２１）の接続を第２バイパス
路（２０）側に切換えることにより、室内熱交換器（５
）から電動膨張弁（４）−第２バイパス路（２０）を経
て圧縮機（１）に戻るサイクルを生ぜしめるようにして
いる。That is, during normal heating operation, the three-way valve (
21) to the outdoor heat exchanger (3) side and connect the electric expansion valve (
4) While circulating the refrigerant on the downstream side to the outdoor heat exchanger (3), if necessary, by switching the connection of the three-way valve (21) to the second bypass path (20) side, the indoor heat exchanger (5)
) to the electric expansion valve (4) and return to the compressor (1) via the second bypass path (20).
【００１９】また、（Ｔｈｕ）は室内熱交換器（５）の
吹出空気の温度Ｔｕ を検出する吹出温度検出手段とし
ての吹出温度センサであって、該吹出温度センサ（Ｔｈ
ｕ）は信号線で空気調和装置の運転を制御するためのコ
ントロ―ラ（３０）に接続されている。そして、該コン
トロ―ラ（３０）により、吹出温度センサ（Ｔｈｕ）等
の信号に応じて、上記圧縮機（１）の運転周波数、室内
ファン（５ａ）の風量、第１バイパス路（１０）の開閉
弁（１１）の開閉、電動膨張弁（４）の開度、三方弁（
２１）の切換え等を制御するようにしている。Further, (Thu) is an outlet temperature sensor as an outlet temperature detection means for detecting the temperature Tu of the air blown out from the indoor heat exchanger (5), and the outlet temperature sensor (Th
u) is connected to a controller (30) for controlling the operation of the air conditioner through a signal line. Then, the controller (30) controls the operating frequency of the compressor (1), the air volume of the indoor fan (5a), the air flow rate of the first bypass path (10), etc. according to the signals from the outlet temperature sensor (Thu), etc. Opening/closing of on-off valve (11), opening degree of electric expansion valve (4), three-way valve (
21) is controlled.
【００２０】暖房運転時、四路切換弁（２）が図中実線
側に切換わり、第１バイパス路（１０）の開閉弁（１１
）は閉じ、かつ三方弁（２１）は室外熱交換器（３）側
に切換わっており、圧縮機（１）から吐出された冷媒が
室内熱交換器（５）で凝縮，液化され、電動膨張弁（４
）で膨張された後、室外熱交換器（３）で蒸発して圧縮
機（１）に戻るように循環する。なお、冷房運転時には
、四路切換弁（２）が図中破線側に切換わり、上記とは
逆の流れとなる。During heating operation, the four-way switching valve (2) is switched to the solid line side in the figure, and the on-off valve (11) of the first bypass path (10) is switched to the solid line side in the figure.
) is closed, and the three-way valve (21) is switched to the outdoor heat exchanger (3) side, and the refrigerant discharged from the compressor (1) is condensed and liquefied in the indoor heat exchanger (5), and the electric Expansion valve (4
), then evaporated in the outdoor heat exchanger (3) and circulated back to the compressor (1). Note that during cooling operation, the four-way switching valve (2) switches to the side shown by the broken line in the figure, resulting in a flow opposite to that described above.
【００２１】ここで、上記暖房運転時におけるコントロ
―ラ（３０）の制御内容について、図３のタイムチャ―
トに基づき説明する。ここで、図３の（ａ）は圧縮機（
１）の運転周波数、同図（ｂ）は電動膨張弁（４）の開
度、同図（ｃ）は開閉弁（１１）の開閉、同図（ｄ）は
三方弁（２１）の切換え、同図（ｅ）は室内ファン（５
ａ）の風量、同図（ｆ）は室内熱交換器（５）の吹出空
気の温度Ｔｕ の時間変化を示す。上述のように、第１
バイパス路（１０）の開閉弁（１１）を閉じ、三方弁（
２１）を室外熱交換器（３）側に切換えて、暖房運転を
行う。この制御により、請求項２の発明にいう暖房運転
制御手段（３１）が構成されている。そして、暖房運転
中に、蒸発器として機能する室外熱交換器（３）が着霜
すると、除霜指令が出力され、第１バイパス路（１０）
の開閉弁（１１）を開き、電動膨張弁（４）を閉じて、
室内ファン（５ａ）の風量を低風量に制御する（図中の
時刻ｔ１ 参照）。この制御により、請求項２の発明に
いう開始制御手段（３２）が構成されている。[0021] Here, regarding the control contents of the controller (30) during the above-mentioned heating operation, the time chart in FIG.
The explanation will be based on the following. Here, (a) in Fig. 3 shows the compressor (
1) operating frequency, (b) the opening of the electric expansion valve (4), (c) the opening and closing of the on-off valve (11), (d) the switching of the three-way valve (21), Figure (e) shows an indoor fan (5
Figure (f) shows the time change in the air flow rate in a), and the temperature Tu of the air blown from the indoor heat exchanger (5). As mentioned above, the first
Close the on-off valve (11) of the bypass path (10), and open the three-way valve (
21) to the outdoor heat exchanger (3) side and perform heating operation. This control constitutes the heating operation control means (31) according to the second aspect of the invention. When the outdoor heat exchanger (3) functioning as an evaporator becomes frosted during heating operation, a defrosting command is output and the first bypass path (10)
Open the on-off valve (11), close the electric expansion valve (4),
The air volume of the indoor fan (5a) is controlled to a low air volume (see time t1 in the figure). This control constitutes the start control means (32) according to the second aspect of the invention.
【００２２】次に、上記開始制御手段（３２）による除
霜運転の開始後、室内熱交換器（５）の吹出空気の温度
が第１設定温度Ｔ１ 以下になると、他の機器の作動は
そのままで電動膨張弁（４）の開度を所定開度に開くよ
う制御する（図中の時刻ｔ２ 参照）。この制御により
、請求項２の発明にいう第１暖房暖房能力増大手段（３
３）が構成されている。Next, after the start control means (32) starts the defrosting operation, when the temperature of the air blown from the indoor heat exchanger (5) becomes equal to or lower than the first set temperature T1, the other equipment continues to operate. The opening of the electric expansion valve (4) is controlled to a predetermined opening (see time t2 in the figure). By this control, the first heating capacity increasing means (3
3) is configured.
【００２３】また、上記第１暖房能力増大手段（３３）
による暖房能力の増大後、上記吹出温度センサ（Ｔｈｕ
）で検出される室内熱交換器（５）の吹出空気の温度Ｔ
ｕ が上記第１設定温度Ｔ１ よりも低い第２設定温度
Ｔ２ 以下になると、他の機器の作動はそのままで、上
記三方弁（２１）により室内熱交換器（５）下流側の冷
媒の流通路を第１バイパス路（２０）側に切換えて、電
動膨張弁（４）の開度を負荷に応じて調節するよう制御
する（図中時刻ｔ３ 参照）。この制御により、請求項
２の発明にいう第２暖房能力増大手段（３４）が構成さ
れている。[0023] Also, the first heating capacity increasing means (33)
After the heating capacity is increased by
) The temperature T of the air blown from the indoor heat exchanger (5) detected by
When u becomes equal to or lower than the second set temperature T2, which is lower than the first set temperature T1, the three-way valve (21) opens the refrigerant flow path downstream of the indoor heat exchanger (5) while other equipment continues to operate. is switched to the first bypass path (20) side, and the opening degree of the electric expansion valve (4) is controlled to be adjusted according to the load (see time t3 in the figure). This control constitutes the second heating capacity increasing means (34) according to the second aspect of the invention.
【００２４】その後、室外熱交換器（３）の除霜が完了
すると、除霜運転の終了指令が出力され、各機器の状態
をすべて上記通常暖房運転時の状態に戻して、暖房運転
に復帰する（図中の時刻ｔ４ 参照）。[0024] After that, when the defrosting of the outdoor heat exchanger (3) is completed, a command to end the defrosting operation is output, and the state of each device is returned to the state of the normal heating operation described above, and the heating operation is resumed. (See time t4 in the figure).
【００２５】したがって、上記実施例では、空気調和装
置に、吐出管（６ａ）から室外熱交換器（３）に直接ホ
ットガスを導入する第１バイパス路（１０）が開閉弁（
１１）を介して設けられ、さらに、主冷媒回路（７）の
電動膨張弁（４）下流側に室外熱交換器（３）をバイパ
スして冷媒を吸入管（６ｂ）に流通させる第２バイパス
路（２０）が設けられているので、暖房運転中における
室外熱交換器（３）の着霜時、開閉弁（１１）を開くこ
とにより室外熱交換器（３）に吐出冷媒を導入して室外
熱交換器（３）の着霜を融解するいわゆる正サイクルに
よる除霜運転が可能であるとともに、三方弁（２１）の
切換えにより電動膨張弁（４）下流側の冷媒を第２バイ
パス路（２０）側にバイパスさせることにより、室内熱
交換器（５）に冷媒を流通させて室内の暖房運転を行う
ことが可能となる。Therefore, in the above embodiment, the first bypass path (10) for directly introducing hot gas from the discharge pipe (6a) to the outdoor heat exchanger (3) is connected to the on-off valve (
11), and is further provided on the downstream side of the electric expansion valve (4) of the main refrigerant circuit (7) to bypass the outdoor heat exchanger (3) and allow the refrigerant to flow into the suction pipe (6b). Since the passage (20) is provided, when the outdoor heat exchanger (3) is frosted during heating operation, the discharge refrigerant can be introduced into the outdoor heat exchanger (3) by opening the on-off valve (11). It is possible to perform defrosting operation using a so-called positive cycle that melts frost on the outdoor heat exchanger (3), and by switching the three-way valve (21), the refrigerant downstream of the electric expansion valve (4) is transferred to the second bypass path ( 20) side, it becomes possible to circulate the refrigerant to the indoor heat exchanger (5) and perform indoor heating operation.
【００２６】すなわち、図４のモリエル線図に示すよう
に、圧縮機（１）からの吐出冷媒が点（Ｐ）で第１バイ
パス路（１０）−室外熱交換器（３）を経由するサイク
ル（Ａ）と、室内熱交換器（５）−第２バイパス路（２
０）を経由するサイクル（Ｂ）との独立した２つのサイ
クルに分離され、除霜と暖房とを同時に行うことが可能
になる。そのとき、電動膨張弁（４）の下流側から第２
バイパス路（２０）が分岐しているので、電動膨張弁（
４）の開度調節により、第１バイパス路（１０）−室外
熱交換器（３）を経由して流れる冷媒の流量と、室内熱
交換器（５）−第２バイパス路（２０）を経由して流れ
る冷媒の流量との比つまり除霜能力と暖房能力との比の
調節が可能となり、暖房運転中の室内の予熱の状態や室
外熱交換器（３）の着霜の融解の進行に応じて、適切な
能力分配を行うことができる。よって、除霜運転時間を
過大にすることなく、空調の快適性の向上を図ることが
できるのである。That is, as shown in the Mollier diagram of FIG. 4, there is a cycle in which the refrigerant discharged from the compressor (1) passes through the first bypass path (10) and the outdoor heat exchanger (3) at point (P). (A) and the indoor heat exchanger (5)-second bypass path (2
It is separated into two independent cycles with cycle (B) passing through step 0), making it possible to perform defrosting and heating at the same time. At that time, the second
Since the bypass path (20) is branched, the electric expansion valve (
4), the flow rate of the refrigerant flowing through the first bypass path (10) - the outdoor heat exchanger (3) and the flow rate of the refrigerant flowing through the indoor heat exchanger (5) - the second bypass path (20) are adjusted. This makes it possible to adjust the ratio between the flow rate of the refrigerant flowing through the air, that is, the ratio between the defrosting capacity and the heating capacity. Appropriate ability distribution can be performed accordingly. Therefore, it is possible to improve the comfort of air conditioning without making the defrosting operation time excessive.
【００２７】また、上記実施例のように、コントロ―ラ
（３０）により除霜の進行に応じた具体的な制御を行っ
た場合、その効果が顕著となる。すなわち、暖房運転制
御手段（３１）による暖房運転中、除霜指令に応じて除
霜運転を開始する時には、開始制御手段（３２）により
、電動膨張弁（４）を閉じ開閉弁（１１）を開くことで
、圧縮機（１）からの吐出冷媒をすべて室外熱交換器（
３）に導入し、室外熱交換器（３）の着霜を速やかに融
解する。このとき、室内ファン（５ａ）が低風量で運転
されるので、室内熱交換器（５）の予熱により室内の暖
房が継続され、空調の快適性が維持される。Further, as in the above embodiment, when the controller (30) performs specific control according to the progress of defrosting, the effect becomes remarkable. That is, during the heating operation by the heating operation control means (31), when starting the defrosting operation in response to the defrosting command, the start control means (32) closes the electric expansion valve (4) and closes the on-off valve (11). By opening it, all the refrigerant discharged from the compressor (1) is transferred to the outdoor heat exchanger (
3) to quickly melt the frost on the outdoor heat exchanger (3). At this time, since the indoor fan (5a) is operated at a low air volume, heating of the room continues by preheating the indoor heat exchanger (5), and the comfort of the air conditioning is maintained.
【００２８】そして、吹出温度センサ（Ｔｈｕ）で検出
される室内熱交換器（５）の吹出空気温度Ｔｕ が第１
設定温度Ｔ１ 以下になると、第１暖房能力増大手段（
３３）により、電動膨張弁（４）が一定開度まで開かれ
るので、室内熱交換器（５）側に吐出冷媒が流れて室内
の暖房が行われ、吹出空気温度Ｔｕ の低下が抑制され
る。[0028] Then, the outlet air temperature Tu of the indoor heat exchanger (5) detected by the outlet temperature sensor (Thu) is the first
When the temperature falls below the set temperature T1, the first heating capacity increasing means (
33), the electric expansion valve (4) is opened to a certain opening degree, so the discharged refrigerant flows to the indoor heat exchanger (5) side, heating the room, and suppressing a decrease in the blowout air temperature Tu. .
【００２９】さらに、その後、吹出空気温度Ｔｕ が第
１設定温度Ｔ１ よりも低い第２設定温度Ｔ２ 以下に
なると、第２暖房能力増大手段（３４）により、三方弁
（２１）が第２バイパス路（２０）側に切換えられると
ともに、電動膨張弁（４）の開度が負荷に応じて調節さ
れ、室内熱交換器（５）への冷媒流量が増大して、室内
の暖房が確保される。すなわち、図４のモリエル線図に
示すように、圧縮機（１）からの吐出冷媒が点（Ｐ）で
第１バイパス路（１０）−室外熱交換器（３）を経由す
るサイクル（Ａ）と、室内熱交換器（５）−第２バイパ
ス路（２０）を経由するサイクル（Ｂ）との独立した２
つのサイクルに分離されるとともに、電動膨張弁（４）
の開度調節によって、両者の能力分配比を適度に調節す
ることにより、室内熱交換器（５）の暖房能力を増大さ
せることができる。Furthermore, when the blowing air temperature Tu becomes equal to or lower than the second set temperature T2 which is lower than the first set temperature T1, the second heating capacity increasing means (34) causes the three-way valve (21) to switch to the second bypass passage. (20) side, the opening degree of the electric expansion valve (4) is adjusted according to the load, the flow rate of refrigerant to the indoor heat exchanger (5) is increased, and indoor heating is ensured. That is, as shown in the Mollier diagram of FIG. 4, the refrigerant discharged from the compressor (1) passes through the first bypass path (10) and the outdoor heat exchanger (3) at point (P) in cycle (A). and an independent cycle (B) via the indoor heat exchanger (5)-second bypass path (20).
Electric expansion valve (4)
By adjusting the opening degree of the indoor heat exchanger (5), the heating capacity of the indoor heat exchanger (5) can be increased by appropriately adjusting the capacity distribution ratio between the two.
【００３０】すなわち、以上のように、除霜の進行に応
じて三方弁（２１）を切換え、除霜能力と暖房能力とを
調節することにより、除霜運転時間を過大にすることな
く、空調の快適性の向上を図ることができるのである。That is, as described above, by switching the three-way valve (21) according to the progress of defrosting and adjusting the defrosting capacity and heating capacity, the air conditioning can be maintained without increasing the defrosting operation time. This allows for improved comfort.
【００３１】なお、上記実施例では、空気調和装置に四
路切換弁（２）を配設し、冷暖房サイクルを切換え可能
としたが、本発明は斯かる実施例に限定されるものでは
なく、暖房専用の空気調和装置についても適用すること
ができる。[0031] In the above embodiment, the air conditioner is provided with a four-way switching valve (2) to enable switching between heating and cooling cycles, but the present invention is not limited to this embodiment. It can also be applied to air conditioners dedicated to heating.
【００３２】[0032]
【発明の効果】以上説明したように、請求項１の発明に
よれば、圧縮機、室外熱交換器、電動膨張弁及び室外熱
交換器を順次接続して空気調和装置の主冷媒回路を構成
し、吐出管から室外熱交換器の入口側液管にホットガス
をバイパスさせる第１バイパス路を開閉弁を介して設け
るとともに、電動膨張弁直下流から吸入管に室外熱交換
器をバイパスする第２バイパス路を設けて、冷媒の流れ
を室外熱交換器側とバイパス路側とに切換えるようにし
たので、暖房運転中における除霜運転時、第１バイパス
路−室外熱交換器を経由して冷媒が循環するサイクルと
室内熱交換器−第２バイパス路を経由するサイクルの２
つの独立したサイクルに分離することができ、正サイク
ルによる除霜運転を行いながら室内の暖房運転を行うこ
とができるとともに、電動膨張弁の開度調節により、除
霜能力と暖房能力との比の調節を行うことができる。As explained above, according to the invention of claim 1, the main refrigerant circuit of an air conditioner is constructed by sequentially connecting the compressor, outdoor heat exchanger, electric expansion valve, and outdoor heat exchanger. A first bypass path is provided via an on-off valve to bypass the hot gas from the discharge pipe to the inlet side liquid pipe of the outdoor heat exchanger, and a first bypass path is provided to bypass the outdoor heat exchanger from directly downstream of the electric expansion valve to the suction pipe. Since two bypass paths are provided to switch the flow of refrigerant between the outdoor heat exchanger side and the bypass path side, during defrosting operation during heating operation, the refrigerant flows through the first bypass path and the outdoor heat exchanger. 2 of the cycle in which the heat exchanger circulates and the cycle that passes through the indoor heat exchanger-second bypass path
It can be separated into two independent cycles, and it is possible to perform indoor heating operation while performing defrosting operation in the normal cycle, and by adjusting the opening of the electric expansion valve, the ratio between defrosting capacity and heating capacity can be adjusted. Adjustments can be made.
【００３３】請求項２の発明によれば、上記請求項１の
発明において、暖房運転中、除霜指令に応じて除霜運転
を開始する時には、電動膨張弁を閉じ開閉弁を開いて室
内ファンを低風量で運転し、その後、室内熱交換器の吹
出空気温度が第１設定温度以下になると、電動膨張弁を
一定開度まで開いて、さらに、その後、吹出空気温度が
第１設定温度よりも低い第２設定温度以下になると、電
動膨張弁直下流の冷媒の流れを第２バイパス路側に切換
え、電動膨張弁の開度を負荷に応じて調節するようにし
たので、除霜の進行に応じて冷媒の流れの切換と電動膨
張弁の開度調節とにより除霜能力と暖房能力とを適度に
調節することができ、除霜運転時間を過大にすることな
く、空調の快適性の向上を図ることができる。According to the invention of claim 2, in the invention of claim 1, when defrosting operation is started in response to a defrosting command during heating operation, the electric expansion valve is closed and the opening/closing valve is opened to turn on the indoor fan. is operated at a low air volume, and then, when the temperature of the blowing air of the indoor heat exchanger becomes lower than the first set temperature, the electric expansion valve is opened to a certain opening degree, and then the blowing air temperature becomes lower than the first set temperature. When the temperature drops below the low second set temperature, the flow of refrigerant directly downstream of the electric expansion valve is switched to the second bypass path, and the opening degree of the electric expansion valve is adjusted according to the load, so that defrosting progresses smoothly. The defrosting capacity and heating capacity can be adjusted appropriately by switching the refrigerant flow and adjusting the opening of the electric expansion valve accordingly, improving the comfort of air conditioning without increasing the defrosting operation time. can be achieved.
【図１】発明の構成を示すブロック図である。FIG. 1 is a block diagram showing the configuration of the invention.
【図２】発明の実施例に係る空気調和装置の冷媒配管系
統図である。FIG. 2 is a refrigerant piping system diagram of an air conditioner according to an embodiment of the invention.
【図３】除霜運転時における各機器の作動変化を示すタ
イムチャ―ト図である。FIG. 3 is a time chart showing changes in the operation of each device during defrosting operation.
【図４】除霜及び暖房同時運転時における冷凍サイクル
の状態を示すモリエル線図である。FIG. 4 is a Mollier diagram showing the state of the refrigeration cycle during simultaneous defrosting and heating operations.
１ 圧縮機 ３ 室外熱交換器 ４ 電動膨張弁 ５ 室内熱交換器 ５ａ 室内ファン ６ａ 吐出管 ６ｂ 吸入管 ７ 主冷媒回路 １０ 第１バイパス路 ２０ 第２バイパス路 ２１ 三方弁（切換手段） ３１ 暖房運転制御手段 ３２ 開始制御手段 ３３ 第１暖房能力増大手段 ３４ 第２暖房能力増大手段 1 Compressor 3 Outdoor heat exchanger 4 Electric expansion valve 5 Indoor heat exchanger 5a Indoor fan 6a Discharge pipe 6b Suction pipe 7 Main refrigerant circuit 10 First bypass path 20 Second bypass path 21 Three-way valve (switching means) 31 Heating operation control means 32 Start control means 33 First heating capacity increasing means 34 Second heating capacity increasing means
Claims (2)
と、電動膨張弁（４）と、室内ファン（５ａ）を付設し
た室内熱交換器（５）とを順次接続してなる主冷媒回路
（７）を備えた空気調和装置において、上記主冷媒回路
（７）の吐出管（６ａ）の一部位（Ｐ）と室外熱交換器
（３）−膨張弁（４）間の液管の一部位（Ｑ）とをバイ
パス接続する第１バイパス路（１０）と、該第１バイパ
ス路（１０）の管路を開閉する開閉弁（１１）と、上記
主冷媒回路（７）の第１バイパス路（１０）との接続部
（Ｑ）−電動膨張弁（４）間の液管と圧縮機（１）の吸
入管（６ｂ）とをバイパス接続する第２バイパス路（２
０）と、上記電動膨張弁（４）下流側の冷媒の流れを室
外熱交換器（３）側と第２バイパス路（２０）側とに切
換える切換手段（２１）とを備えたことを特徴とする空
気調和装置。[Claim 1] Compressor (1) and outdoor heat exchanger (3)
In an air conditioner comprising a main refrigerant circuit (7) formed by sequentially connecting an electric expansion valve (4) and an indoor heat exchanger (5) with an indoor fan (5a), the main refrigerant circuit A first bypass path (10 ), an on-off valve (11) that opens and closes the pipeline of the first bypass path (10), and a connection part (Q) between the first bypass path (10) of the main refrigerant circuit (7) - an electric expansion valve (4) and the suction pipe (6b) of the compressor (1).
0), and a switching means (21) for switching the flow of refrigerant downstream of the electric expansion valve (4) to the outdoor heat exchanger (3) side and the second bypass path (20) side. air conditioning equipment.
、空気調和装置の暖房運転時、第１バイパス路（１０）
の開閉弁（１１）を閉じ、切換手段（２１）により室内
熱交換器（５）からの冷媒を室外熱交換器（３）に流通
させるよう制御する暖房運転制御手段（３１）と、暖房
運転中の除霜運転指令時、上記第１バイパス路（１０）
の開閉弁（１１）を開き、電動膨張弁（４）を閉じて、
室内ファン（５ａ）の風量を低風量に制御する開始制御
手段（３２）と、上記室内熱交換器（５）の吹出空気の
温度を検出する吹出温度検出手段（Ｔｈｕ）と、該吹出
温度検出手段（Ｔｈｕ） の出力を受け、上記開始制御
手段（３２）による除霜運転の開始後、室内熱交換器（
５）の吹出空気の温度が第１設定温度以下になると、電
動膨張弁（４）を一定開度に開くよう制御する第１暖房
能力増大手段（３３）と、該第１暖房能力増大手段（３
３）による暖房能力の増大後、上記吹出温度検出手段（
Ｔｈｕ）で検出される室内熱交換器（５）の吹出空気の
温度が上記第１設定温度よりも低い第２設定温度以下に
なると、上記切換手段（２１）により電動膨張弁（４）
下流側の冷媒の流れを第２バイパス路（２０）側に切換
えて、電動膨張弁（４）の開度を負荷に応じて調節する
よう制御する第２暖房能力増大手段（３４）とを備えた
ことを特徴とする空気調和装置。2. The air conditioner according to claim 1, wherein during heating operation of the air conditioner, the first bypass path (10)
heating operation control means (31) for controlling the switching means (21) to close the on-off valve (11) and to cause the refrigerant from the indoor heat exchanger (5) to flow to the outdoor heat exchanger (3); When the defrosting operation is commanded, the first bypass path (10)
Open the on-off valve (11), close the electric expansion valve (4),
a start control means (32) for controlling the air volume of the indoor fan (5a) to a low air volume; a blowout temperature detection means (Thu) for detecting the temperature of the air blown out from the indoor heat exchanger (5); In response to the output of the means (Thu), after the start control means (32) starts the defrosting operation, the indoor heat exchanger (
a first heating capacity increasing means (33) that controls the electric expansion valve (4) to open to a constant opening degree when the temperature of the blown air becomes equal to or lower than the first set temperature; 3
After the heating capacity is increased by 3), the above-mentioned blowout temperature detection means (
When the temperature of the air blown from the indoor heat exchanger (5) detected by the switching means (21) becomes equal to or lower than the second set temperature, which is lower than the first set temperature, the electric expansion valve (4) is switched on by the switching means (21).
A second heating capacity increasing means (34) controls the flow of the downstream refrigerant to the second bypass path (20) and adjusts the opening degree of the electric expansion valve (4) according to the load. An air conditioner characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3141884A JP2993180B2 (en) | 1991-06-13 | 1991-06-13 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3141884A JP2993180B2 (en) | 1991-06-13 | 1991-06-13 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04366341A true JPH04366341A (en) | 1992-12-18 |
| JP2993180B2 JP2993180B2 (en) | 1999-12-20 |
Family
ID=15302406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3141884A Expired - Fee Related JP2993180B2 (en) | 1991-06-13 | 1991-06-13 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2993180B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06265242A (en) * | 1993-03-11 | 1994-09-20 | Nippondenso Co Ltd | Engine driven heat pump |
| EP1484559A4 (en) * | 2002-01-29 | 2006-06-21 | Daikin Ind Ltd | WATER HEAT PUMP TYPE A HEAT PUMP |
| JP2007278536A (en) * | 2006-04-03 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JP2008020181A (en) * | 2006-07-11 | 2008-01-31 | Lg Electronics Inc | Air conditioning system and control method thereof |
| JP2009036502A (en) * | 2007-07-10 | 2009-02-19 | Panasonic Corp | Air conditioner |
| WO2010055670A1 (en) | 2008-11-17 | 2010-05-20 | ダイキン工業株式会社 | Air conditioning device |
| WO2012032682A1 (en) * | 2010-09-09 | 2012-03-15 | パナソニック株式会社 | Air conditioning apparatus |
| JP2013104623A (en) * | 2011-11-15 | 2013-05-30 | Panasonic Corp | Refrigeration cycle device and air conditioner with the same |
| CN107421072A (en) * | 2017-07-31 | 2017-12-01 | 珠海格力电器股份有限公司 | Air conditioner and its anti-high temperature control method |
| CN113654193A (en) * | 2021-07-30 | 2021-11-16 | 青岛海尔空调器有限总公司 | Method and device for defrosting control of air conditioner and air conditioner |
| CN117308317A (en) * | 2023-10-30 | 2023-12-29 | 青岛海尔空调器有限总公司 | Method, device, air conditioner and computer-readable storage medium for controlling air conditioner |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3932913B2 (en) * | 2002-01-29 | 2007-06-20 | ダイキン工業株式会社 | Heat pump water heater |
-
1991
- 1991-06-13 JP JP3141884A patent/JP2993180B2/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06265242A (en) * | 1993-03-11 | 1994-09-20 | Nippondenso Co Ltd | Engine driven heat pump |
| US7883024B2 (en) | 2002-01-29 | 2011-02-08 | Daikin Industries, Ltd. | Heat pump type water heater |
| EP1484559A4 (en) * | 2002-01-29 | 2006-06-21 | Daikin Ind Ltd | WATER HEAT PUMP TYPE A HEAT PUMP |
| JP2007278536A (en) * | 2006-04-03 | 2007-10-25 | Matsushita Electric Ind Co Ltd | Air conditioner |
| JP2008020181A (en) * | 2006-07-11 | 2008-01-31 | Lg Electronics Inc | Air conditioning system and control method thereof |
| EP1878985A3 (en) * | 2006-07-11 | 2010-02-24 | LG Electronics Inc. | Air conditioning system and method of controlling the same |
| JP2009036502A (en) * | 2007-07-10 | 2009-02-19 | Panasonic Corp | Air conditioner |
| JP2010121789A (en) * | 2008-11-17 | 2010-06-03 | Daikin Ind Ltd | Air conditioner |
| WO2010055670A1 (en) | 2008-11-17 | 2010-05-20 | ダイキン工業株式会社 | Air conditioning device |
| CN102197269A (en) * | 2008-11-17 | 2011-09-21 | 大金工业株式会社 | Air conditioning device |
| US8707719B2 (en) | 2008-11-17 | 2014-04-29 | Daikin Industries, Ltd. | Air conditioner |
| WO2012032682A1 (en) * | 2010-09-09 | 2012-03-15 | パナソニック株式会社 | Air conditioning apparatus |
| JP2012057878A (en) * | 2010-09-09 | 2012-03-22 | Panasonic Corp | Air conditioner |
| JP2013104623A (en) * | 2011-11-15 | 2013-05-30 | Panasonic Corp | Refrigeration cycle device and air conditioner with the same |
| CN107421072A (en) * | 2017-07-31 | 2017-12-01 | 珠海格力电器股份有限公司 | Air conditioner and its anti-high temperature control method |
| CN113654193A (en) * | 2021-07-30 | 2021-11-16 | 青岛海尔空调器有限总公司 | Method and device for defrosting control of air conditioner and air conditioner |
| WO2023005388A1 (en) * | 2021-07-30 | 2023-02-02 | 青岛海尔空调器有限总公司 | Method and device for air conditioner defrosting control, and air conditioner |
| CN113654193B (en) * | 2021-07-30 | 2023-02-17 | 青岛海尔空调器有限总公司 | Method and device for air conditioner defrosting control, air conditioner |
| CN117308317A (en) * | 2023-10-30 | 2023-12-29 | 青岛海尔空调器有限总公司 | Method, device, air conditioner and computer-readable storage medium for controlling air conditioner |
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