JPH0652142B2 - Air conditioner - Google Patents
Air conditionerInfo
- Publication number
- JPH0652142B2 JPH0652142B2 JP11311386A JP11311386A JPH0652142B2 JP H0652142 B2 JPH0652142 B2 JP H0652142B2 JP 11311386 A JP11311386 A JP 11311386A JP 11311386 A JP11311386 A JP 11311386A JP H0652142 B2 JPH0652142 B2 JP H0652142B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat storage
- heat exchanger
- defrosting
- refrigerant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【発明の詳細な説明】 (イ)産業上の利用分野 本発明は四方弁の切換操作で冷凍サイクルを可逆として
暖房運転並びに冷房（除霜）運転が行なえるようにした
空気調和機に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an air conditioner capable of performing a heating operation and a cooling (defrosting) operation by reversing a refrigeration cycle by switching a four-way valve.
(ロ)従来の技術 従来、この種の空気調和機の除霜方法としては、特公昭
６１−６３０１号公報に示されたようなものが開示され
ている。この内容は室外熱交換器に付着した霜を溶かす
ために四方弁を暖房状態から冷房状態に切り換えて室外
熱交換器を凝縮器として、室内熱交換器を蒸発器として
夫々作用させるものである。(B) Conventional Technology As a conventional defrosting method for an air conditioner of this type, a method disclosed in Japanese Patent Publication No. 61-6301 has been disclosed. In order to melt the frost adhering to the outdoor heat exchanger, the contents are to switch the four-way valve from the heating state to the cooling state so that the outdoor heat exchanger acts as a condenser and the indoor heat exchanger acts as an evaporator.
(ハ)発明が解決しようとする問題点 このような空気調和機においては、除霜時に室内熱交換
器が蒸発器として作用するため、室内温度が低下する欠
点があった。(C) Problems to be Solved by the Invention In such an air conditioner, the indoor heat exchanger acts as an evaporator during defrosting, which has a drawback that the indoor temperature decreases.
本発明は除霜時の室内温度の低下を低く抑えることを目
的としたものである。The present invention is intended to suppress a decrease in indoor temperature during defrosting to a low level.
(ニ)問題点を解決するための手段 この目的を達成するために、本発明は暖房運転時に高圧
側となり除霜運転時に低圧側となる配管に蓄熱槽を設
け、この蓄熱槽には融点が３８〜４６℃程度で、融解潜
熱が４５〜６５Kcal／kg程度のパラフィンワックスを入
れて、暖房運転中に冷媒の凝縮温度がパラフィンワック
スの融点以下になった時に除霜を始めるようにしたもの
である。(D) Means for solving the problem In order to achieve this object, the present invention provides a heat storage tank in the pipe that becomes the high-pressure side during heating operation and the low-pressure side during defrosting operation, and this heat storage tank has a melting point. Paraffin wax with a latent heat of fusion of about 45 to 65 Kcal / kg was added at about 38 to 46 ° C, and defrosting was started when the condensation temperature of the refrigerant fell below the melting point of the paraffin wax during heating operation. is there.
(ホ)作用 冷媒の凝縮温度がパラフィンワックス（蓄熱材）の融点
（３８〜４６℃）以下になった時に除霜運転を開始させ
るようにしたので、この除霜運転時の低圧側の冷媒温度
がパラフィンワックスの融点以下になるおそれを少なく
して、室内熱交換器の極端な温度低下を防ぐようにして
いる。(E) Action Since the defrosting operation is started when the condensation temperature of the refrigerant falls below the melting point (38 to 46 ° C) of the paraffin wax (heat storage material), the refrigerant temperature on the low pressure side during this defrosting operation Is less likely to fall below the melting point of paraffin wax to prevent an extreme temperature drop in the indoor heat exchanger.
(ヘ)実施例 第１図は本発明の空気調和機の一実施例の冷媒回路図
で、１は圧縮機、２は四方弁で、暖房運転時は実線状態
に設定され、除霜（冷房）運転時は破線状態に設定され
る。３は室内熱交換器、４は減圧装置、５は室外熱交換
器、６は蓄熱槽で、この槽内には室内熱交換器３と減圧
装置４とをつなぐ冷媒配管７が配設されている。又、こ
の蓄熱槽には下表に示すパラフィンワックスが蓄熱材８
として収められている。(F) Embodiment FIG. 1 is a refrigerant circuit diagram of an embodiment of the air conditioner of the present invention, in which 1 is a compressor, 2 is a four-way valve, and the solid line state is set during heating operation, and defrosting (cooling) is performed. ) During operation, the broken line is set. 3 is an indoor heat exchanger, 4 is a decompression device, 5 is an outdoor heat exchanger, 6 is a heat storage tank, and a refrigerant pipe 7 connecting the indoor heat exchanger 3 and the decompression device 4 is arranged in this tank. There is. In addition, the paraffin wax shown in the table below is used as the heat storage material 8 in this heat storage tank.
It is stored as.
名称：低融点・高ノルマル含量パラフィンワックス “ＳＰ−０１１０”日本精蝋（株） 融点；43.7℃、油分：0.4WH％、 粘度；2.7cst/％、平均炭素数；22.5、 炭素数分布；18〜19、融解熱40〜48Kcal/kg ９は室内熱交換器３と蓄熱槽６とをつなぐ配管１０に取
り付けられた第１温度センサで、暖房運転時にこの配管
１０内を流れる冷媒を検知している。そしてこの冷媒の
温度が４３℃（蓄熱材の融点）以下となった時には室外
熱交換器５に霜が付着してこの室外熱交換器５から十分
に熱が汲み上げられないと判断して、除霜運転にはい
る。すなわち制御装置１１からの信号で四方弁２を破線
状態に切換えるようになっている。１２は室外熱交換器
５に取り付けられた第２温度センサで、この室外熱交換
器５の温度を検知している。そして、前述の配管１０内
を流れる冷媒の温度が４３℃以上でも、この室外熱交換
器の温度が−１５℃以下の時には除霜運転にはいるよう
になっている。Name: Low melting point, high normal content paraffin wax “SP-0110” Nippon Seiro Co., Ltd. Melting point: 43.7 ° C., oil: 0.4 WH%, viscosity: 2.7 cst /%, average carbon number: 22.5, carbon number distribution; 18 ~ 19, heat of fusion 40 ~ 48Kcal / kg A first temperature sensor 9 is attached to a pipe 10 that connects the indoor heat exchanger 3 and the heat storage tank 6, and detects a refrigerant flowing in the pipe 10 during heating operation. Then, when the temperature of this refrigerant becomes 43 ° C. (melting point of the heat storage material) or less, it is determined that frost adheres to the outdoor heat exchanger 5 and heat cannot be sufficiently pumped from the outdoor heat exchanger 5, Enter frost driving. That is, the four-way valve 2 is switched to the broken line state by a signal from the control device 11. A second temperature sensor 12 is attached to the outdoor heat exchanger 5 and detects the temperature of the outdoor heat exchanger 5. Even when the temperature of the refrigerant flowing through the pipe 10 is 43 ° C. or higher, the defrosting operation is started when the temperature of the outdoor heat exchanger is −15 ° C. or lower.
このような構成を備えた空気調和機において、暖房運転
時は四方弁２を実線状態に設定して圧縮機１から吐出さ
れた冷媒を実線矢印のように流す。そして室内熱交換器
３を凝縮器として作用させ室内を暖房する。この時、蓄
熱槽６内の冷媒管７内で凝縮液化した際に冷媒が放出し
た凝縮熱は蓄熱槽６内の蓄熱材８を加熱してこれを融解
する。従って蓄熱材８は４０〜４８Kcal／kgの融解潜熱
を保有して蓄熱されている。このように暖房運転時は、
室内熱交換器３で室内を暖房すると同時に、蓄熱槽６に
蓄熱を行なう。In the air conditioner having such a configuration, during heating operation, the four-way valve 2 is set to the solid line state, and the refrigerant discharged from the compressor 1 flows as indicated by the solid line arrow. Then, the indoor heat exchanger 3 is operated as a condenser to heat the room. At this time, the condensation heat released by the refrigerant when condensed and liquefied in the refrigerant pipe 7 in the heat storage tank 6 heats the heat storage material 8 in the heat storage tank 6 to melt it. Therefore, the heat storage material 8 stores latent heat of fusion of 40 to 48 Kcal / kg. In this way, during heating operation,
At the same time that the indoor heat exchanger 3 heats the room, heat is stored in the heat storage tank 6.
この暖房運転中に、第１温度センサ９で室内熱交換器３
から流れ出た冷媒の温度を検知して、この温度が４３℃
以下となった時には、外気温の低下によって室外熱交換
器５に霜が付着してこの室外熱交換器５での熱の汲み上
げ量が減少したものと判断して、除霜運転を行なう。During this heating operation, the indoor temperature of the indoor heat exchanger 3 is increased by the first temperature sensor 9.
The temperature of the refrigerant flowing out from the
When the temperature falls below, it is determined that frost has adhered to the outdoor heat exchanger 5 due to the decrease in the outside air temperature, and the amount of heat pumped up in the outdoor heat exchanger 5 has decreased, and the defrosting operation is performed.
この除霜運転時は、制御装置１１からの信号で四方弁２
を破線状態に切り換え、圧縮機１を運転させ、冷媒を破
線矢印のように流す。すなわち、蓄熱槽６内に流れ込ん
だ冷媒は蓄熱材８の熱で加熱され室内熱交換器３に送り
込まれる。この時蓄熱材８は融点（４３℃）以上となっ
ているため、室内熱交換器３に送り込まれる冷媒の温度
は、人間の体温よりも低くなるおそれは少ない。このた
め室内熱交換器３の温度も極端に低くなるおそれが少な
く室内温度の低下を小さく抑えることができる。そして
この除霜運転開始から一定時間（約２０分）経過後に配
管１０内を流れる冷媒の温度を第１温度センサ９で検知
して、この温度が４３℃以上になった時には前述の暖房
運転に戻る。尚、冷房運転時の冷媒の流れは除霜運転時
の流れと同一であるので、その説明は省略した。During this defrosting operation, the four-way valve 2 is activated by a signal from the control device 11.
Is switched to the broken line state, the compressor 1 is operated, and the refrigerant is flown as indicated by the broken line arrow. That is, the refrigerant flowing into the heat storage tank 6 is heated by the heat of the heat storage material 8 and sent to the indoor heat exchanger 3. At this time, since the heat storage material 8 has a melting point (43 ° C.) or higher, the temperature of the refrigerant sent to the indoor heat exchanger 3 is less likely to be lower than the human body temperature. Therefore, the temperature of the indoor heat exchanger 3 is unlikely to be extremely low, and the decrease in the indoor temperature can be suppressed to a small level. The temperature of the refrigerant flowing in the pipe 10 is detected by the first temperature sensor 9 after a lapse of a certain time (about 20 minutes) from the start of the defrosting operation, and when the temperature becomes 43 ° C. or higher, the above heating operation is performed. Return. Since the flow of the refrigerant during the cooling operation is the same as the flow during the defrosting operation, its description is omitted.
前述の蓄熱槽６は第２図に示すように、四方弁２と室内
熱交換器３との間に配設したり第３図に示すように室内
熱交換器３と並列に配設しても良い。The heat storage tank 6 is arranged between the four-way valve 2 and the indoor heat exchanger 3 as shown in FIG. 2 or in parallel with the indoor heat exchanger 3 as shown in FIG. Is also good.
(ト)発明の効果 以上述べたように、本発明は除霜時の冷媒を加熱する蓄
熱材として融点が３８〜４６℃程度で融解潜熱が４５〜
６５Kcal／kgのパラフィンワックスを使用し、暖房運転
中の冷媒の凝縮温度が、この蓄熱材の融点以下となった
時に除霜運転を開始するようにしたものである。すなわ
ち、蓄熱材の融点と除霜運転開始の冷媒の凝縮温度とを
人間の体温よりも高い温度（３８〜４６℃）で略一致さ
せたので、除霜時の室内熱交換器の温度が人間の体温よ
りも低くなるおそれは少なく室内温度の低下を低く抑え
ることができる。(G) Effect of the Invention As described above, the present invention has a melting point of about 38 to 46 ° C and a latent heat of fusion of 45 to 45 as a heat storage material for heating the refrigerant during defrosting.
A paraffin wax of 65 Kcal / kg is used, and the defrosting operation is started when the condensation temperature of the refrigerant during the heating operation becomes equal to or lower than the melting point of the heat storage material. That is, since the melting point of the heat storage material and the condensation temperature of the refrigerant at the start of the defrosting operation are substantially matched with each other at a temperature higher than the human body temperature (38 to 46 ° C), the temperature of the indoor heat exchanger during defrosting is the same as the human temperature. It is less likely that the temperature will be lower than the body temperature, and the decrease in room temperature can be suppressed to a low level.
又、室内熱交換器の温度の低下が低く抑えられるので、
暖房復帰時の室内熱交換器の温度上昇が早く室内温度を
短時間で設定温度に上げることができる。Also, since the temperature drop of the indoor heat exchanger can be kept low,
The temperature of the indoor heat exchanger rises quickly when heating is restored, and the indoor temperature can be raised to the set temperature in a short time.
第１図は本発明の空気調和機の一実施例を示す冷媒回路
図、第２図、第３図は夫々本発明の異なる実施例を示す
冷媒回路図である。 ２…四方弁、６…蓄熱槽、８…蓄熱材、１１…制御装
置。FIG. 1 is a refrigerant circuit diagram showing an embodiment of the air conditioner of the present invention, and FIGS. 2 and 3 are refrigerant circuit diagrams showing different embodiments of the present invention. 2 ... four-way valve, 6 ... heat storage tank, 8 ... heat storage material, 11 ... control device.
Claims (1)
して、暖房運転並びに除霜（冷房）運転を可能とした空
気調和機において、暖房運転時に高圧側となり除霜運転
時に低圧側となる配管に蓄熱槽を付設すると共に、この
蓄熱槽に収容する蓄熱材として融点が３８〜４６℃程度
で、融解潜熱が４５〜６５Kcal／kg程度のパラフィンワ
ックスを使用し、且つ暖房運転時に冷媒の凝縮温度が前
記蓄熱材の融点以下になった時に四方弁を切り換えて除
霜運転を行なわせる装置を備えたことを特徴とする空気
調和機。1. An air conditioner capable of heating operation and defrosting (cooling) operation by reversing a refrigeration cycle by switching a four-way valve, and a pipe having a high pressure side during a heating operation and a low pressure side during a defrosting operation. A paraffin wax having a melting point of about 38 to 46 ° C. and a latent heat of fusion of about 45 to 65 Kcal / kg is used as a heat storage material to be accommodated in the heat storage tank, and the condensing temperature of the refrigerant during heating operation. An air conditioner comprising: a device for switching a four-way valve to perform a defrosting operation when the temperature becomes lower than the melting point of the heat storage material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11311386A JPH0652142B2 (en) | 1986-05-16 | 1986-05-16 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11311386A JPH0652142B2 (en) | 1986-05-16 | 1986-05-16 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62294856A JPS62294856A (en) | 1987-12-22 |
| JPH0652142B2 true JPH0652142B2 (en) | 1994-07-06 |
Family
ID=14603837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11311386A Expired - Lifetime JPH0652142B2 (en) | 1986-05-16 | 1986-05-16 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0652142B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201610977D0 (en) * | 2016-06-23 | 2016-08-10 | Sunamp Ltd | A thermal energy storage system |
| WO2018198275A1 (en) | 2017-04-27 | 2018-11-01 | 三菱電機株式会社 | Refrigeration cycle device |
-
1986
- 1986-05-16 JP JP11311386A patent/JPH0652142B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62294856A (en) | 1987-12-22 |
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