JP2001183020A - Refrigerating device - Google Patents
Refrigerating deviceInfo
- Publication number
- JP2001183020A JP2001183020A JP36997399A JP36997399A JP2001183020A JP 2001183020 A JP2001183020 A JP 2001183020A JP 36997399 A JP36997399 A JP 36997399A JP 36997399 A JP36997399 A JP 36997399A JP 2001183020 A JP2001183020 A JP 2001183020A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- accumulator
- refrigerating
- compressor
- receiver
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/12—Inflammable refrigerants
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、Ｒ３２(化学式
ＣＨ2Ｆ2)冷媒を含む作動媒体を用いた冷凍装置に関す
る。TECHNICAL FIELD The present invention relates to a refrigeration apparatus using a working medium containing an R32 (chemical formula CH 2 F 2) refrigerant.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】冷媒
を用いたヒートポンプ方式の冷凍装置において、オゾン
層破壊係数やＧＷＰ(地球温暖化係数)が大きいＨＣＦＣ
系冷媒がフロン規制の対象となったことから、その代替
冷媒として、オゾン層を破壊しないＧＷＰの高いＨＦＣ
系冷媒としてＲ４１０Ａ(Ｒ３２：Ｒ１２５＝５０：５
０)冷媒が用いられている。このＲ４１０Ａ冷媒を用い
た冷凍装置では、Ｒ２２と同等のＣＯＰ(成績係数)が得
られるものが製品化されている。ところが、このＲ４１
０Ａ冷媒では、熱運搬能力が低いために十分な能力を得
るために冷媒充填量を多くしなければならず、容積の大
きなアキュームレータおよびレシーバが必要なため、コ
ストが高くつくと共に、アキュームレータやレシーバの
配置を考慮しなければならないため、小型化が容易にで
きないという問題がある。2. Description of the Related Art In a heat pump type refrigerating apparatus using a refrigerant, an HCFC having a large ozone depletion potential and a large GWP (global warming potential) is used.
HFCs with high GWP, which do not destroy the ozone layer, have been used as alternative refrigerants because the system refrigerants have been subject to CFC regulations.
R410A (R32: R125 = 50: 5)
0) Refrigerant is used. A refrigeration apparatus using the R410A refrigerant has been commercialized to obtain a COP (coefficient of performance) equivalent to that of R22. However, this R41
In the 0A refrigerant, since the heat transfer capacity is low, the refrigerant charge must be increased in order to obtain a sufficient capacity, and a large-volume accumulator and receiver are required. Since the arrangement has to be considered, there is a problem that the size cannot be easily reduced.
【０００３】そこで、この発明の目的は、Ｒ３２冷媒を
含む作動媒体を用いて、コスト低減と小型化ができる冷
凍装置を提供することにある。Accordingly, an object of the present invention is to provide a refrigeration apparatus that can reduce the cost and reduce the size by using a working medium containing R32 refrigerant.
【０００４】[0004]
【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の冷凍装置は、圧縮機,凝縮器,減圧手段お
よび蒸発器が環状に接続された冷媒回路に、Ｒ３２冷媒
またはＲ３２を少なくとも７０重量％以上含む混合冷媒
を用いた冷凍装置であって、上記冷媒回路にアキューム
レータを有しないことを特徴としている。According to a first aspect of the present invention, there is provided a refrigeration apparatus comprising: a refrigerant circuit in which a compressor, a condenser, a pressure reducing means, and an evaporator are connected in an annular manner; A refrigeration system using a mixed refrigerant containing at least 70% by weight or more, wherein the refrigerant circuit has no accumulator.
【０００５】本出願人は、Ｒ３２冷媒またはＲ３２を少
なくとも７０重量％以上含む混合冷媒を用いた冷凍装置
において、Ｒ３２冷媒がＲ４１０Ａ冷媒よりも少ない冷
媒充填量で高いＣＯＰが得られ、さらに、冷房時の最適
冷媒量と暖房時の最適冷媒量との差も小さいということ
を実験により見出した。In the refrigerating apparatus using the R32 refrigerant or the mixed refrigerant containing at least 70% by weight of R32, the applicant of the present invention can obtain a high COP with the R32 refrigerant having a smaller refrigerant charging amount than the R410A refrigerant, and furthermore, has a high cooling performance. It has been found through experiments that the difference between the optimum refrigerant amount for heating and the optimum refrigerant amount for heating is small.
【０００６】したがって、上記請求項１の冷凍装置によ
れば、Ｒ３２冷媒またはＲ３２を少なくとも７０重量％
以上含む混合冷媒は、Ｒ４１０Ａ冷媒に比べて熱搬送能
力が高く、少ない冷媒充填量で十分な能力が得られると
共に、Ｒ４１０Ａ冷媒に比べて冷房時の最適冷媒量と暖
房時の最適冷媒量との差が小さいので、熱交換器容量等
のシステム全体の容量調整によりアキュームレータ自体
がなくとも冷媒量を調整できる。これにより、アキュー
ムレータを無くすことが可能となり、コスト低減と小型
化ができる。(ここに、アキュームレータとは、圧縮機
に付属しているアキュームではなく、冷媒調整用の低圧
レシーバ型の製品側アキュームレータを言う。)Therefore, according to the refrigerating apparatus of the first aspect, at least 70% by weight of the R32 refrigerant or R32 is contained.
The mixed refrigerant containing the above has a higher heat transfer capability than the R410A refrigerant, and a sufficient capacity can be obtained with a small amount of refrigerant charged, and the optimum refrigerant amount during cooling and the optimal refrigerant amount during heating as compared with the R410A refrigerant. Since the difference is small, the amount of refrigerant can be adjusted without the accumulator itself by adjusting the capacity of the entire system such as the heat exchanger capacity. As a result, the accumulator can be eliminated, and the cost and size can be reduced. (Here, the accumulator is not the accumulator attached to the compressor but a low-pressure receiver type product-side accumulator for adjusting the refrigerant.)
【０００７】また、請求項２の冷凍装置は、圧縮機,凝
縮器,減圧手段および蒸発器が環状に接続された冷媒回
路に、Ｒ３２冷媒またはＲ３２を少なくとも７０重量％
以上含む混合冷媒を用いた冷凍装置であって、上記冷媒
回路にレシーバを有しないことを特徴としている。In the refrigeration apparatus of the present invention, at least 70% by weight of R32 refrigerant or R32 is contained in a refrigerant circuit in which a compressor, a condenser, a decompression means and an evaporator are connected in a ring.
A refrigerating apparatus using the mixed refrigerant as described above, wherein the refrigerant circuit has no receiver.
【０００８】上記請求項２の冷凍装置によれば、Ｒ３２
冷媒またはＲ３２を少なくとも７０重量％以上含む混合
冷媒は、Ｒ４１０Ａ冷媒に比べて熱搬送能力が高く、少
ない冷媒充填量で十分な能力が得られると共に、Ｒ４１
０Ａ冷媒に比べて冷房時の最適冷媒量と暖房時の最適冷
媒量との差が小さいので、熱交換器容量等のシステム全
体の容量調整によりレシーバ自体がなくとも冷媒量を調
整できる。これにより、レシーバを無くすことが可能と
なり、コスト低減と小型化ができる。According to the refrigeration apparatus of the second aspect, R32
A refrigerant or a mixed refrigerant containing at least 70% by weight or more of R32 has a higher heat transfer capability than the R410A refrigerant, and a sufficient capacity can be obtained with a small amount of refrigerant charged.
Since the difference between the optimal refrigerant amount for cooling and the optimal refrigerant amount for heating is smaller than that of the 0A refrigerant, the refrigerant amount can be adjusted without the receiver itself by adjusting the capacity of the entire system such as the heat exchanger capacity. As a result, it is possible to eliminate the receiver, and it is possible to reduce the cost and reduce the size.
【０００９】また、請求項３の冷凍装置は、圧縮機,凝
縮器,減圧手段および蒸発器が環状に接続された冷媒回
路に、Ｒ３２冷媒またはＲ３２を少なくとも７０重量％
以上含む混合冷媒を用いた冷凍装置であって、上記冷媒
回路にアキュームレータおよびレシーバを有しないこと
を特徴としている。In the refrigeration apparatus of the present invention, at least 70% by weight of R32 refrigerant or R32 is contained in a refrigerant circuit in which a compressor, a condenser, a decompression means and an evaporator are connected in a ring.
A refrigeration apparatus using the mixed refrigerant as described above, wherein the refrigerant circuit does not include an accumulator and a receiver.
【００１０】上記請求項３の冷凍装置によれば、Ｒ３２
冷媒またはＲ３２を少なくとも７０重量％以上含む混合
冷媒は、Ｒ４１０Ａ冷媒に比べて熱搬送能力が高く、少
ない冷媒充填量で十分な能力が得られると共に、Ｒ４１
０Ａ冷媒に比べて冷房時の最適冷媒量と暖房時の最適冷
媒量との差が小さいので、熱交換器容量等のシステム全
体の容量調整によりアキュームレータおよびレシーバ自
体がなくとも冷媒量を調整できる。これにより、アキュ
ームレータおよびレシーバを無くすことが可能となり、
コスト低減と小型化ができる。According to the refrigeration apparatus of the third aspect, R32
A refrigerant or a mixed refrigerant containing at least 70% by weight or more of R32 has a higher heat transfer capability than the R410A refrigerant, and a sufficient capacity can be obtained with a small amount of refrigerant charged.
Since the difference between the optimal refrigerant amount during cooling and the optimal refrigerant amount during heating is smaller than that of the 0A refrigerant, the refrigerant amount can be adjusted without the accumulator and the receiver itself by adjusting the capacity of the entire system such as the heat exchanger capacity. This makes it possible to eliminate the accumulator and receiver,
Cost reduction and miniaturization can be achieved.
【００１１】また、請求項４の冷凍装置は、請求項１乃
至３のいずれか１つの冷凍装置において、冷凍能力が４
ｋＷ以下であることを特徴としている。A refrigeration apparatus according to a fourth aspect of the present invention is the refrigeration apparatus according to any one of the first to third aspects, wherein the refrigeration capacity is 4%.
kW or less.
【００１２】上記請求項４の冷凍装置によれば、冷凍能
力が４ｋＷ以下であれば、確実にアキュームレータおよ
びレシーバ(空気調和機における冷房／暖房の調節用の
モジュレータも含む)を無くすことができる。According to the refrigerating apparatus of the fourth aspect, if the refrigerating capacity is 4 kW or less, the accumulator and the receiver (including the modulator for controlling cooling / heating in the air conditioner) can be surely eliminated.
【００１３】[0013]
【発明の実施の形態】以下、この発明の冷凍装置を図示
の実施の形態により詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The refrigeration system of the present invention will be described below in detail with reference to the embodiments shown in the drawings.
【００１４】図１はこの発明の実施の一形態の冷凍装置
としてのヒートポンプ式空気調和機の概略構成を示す回
路図であり、１は圧縮機、２は上記圧縮機１の吐出側に
一端が接続された四路切換弁、３は上記四路切換弁２の
他端に一端が接続された室外熱交換器、４は上記室外熱
交換器３の他端に一端が接続された電動膨張弁、５は上
記電動膨張弁４の他端に一端が接続され、他端が四路切
換弁２を介して圧縮機１の吸入側に接続された室内熱交
換器である。上記空気調和機は、圧縮機１の吐出管温度
を検出する温度センサ１１と、室外熱交換器３の冷媒温
度を検出する温度センサ１２と、外気温度を検出する温
度センサ１３と、室内熱交換器５の冷媒温度を検出する
温度センサ１４と、室内温度を検出する温度センサ１５
と、上記圧縮機１の吸込側の冷媒温度を検出する温度セ
ンサ１６と、上記温度センサ１１〜１６からの信号を受
けて、圧縮機１,電動膨張弁４等を制御する制御装置７
とを備えている。また、上記電動膨張弁４と室内熱交換
器５との間に閉鎖弁２１を配設すると共に、室内熱交換
器５と四路切換弁２との間に閉鎖弁２４を配設してい
る。FIG. 1 is a circuit diagram showing a schematic configuration of a heat pump type air conditioner as a refrigeration apparatus according to an embodiment of the present invention, wherein 1 is a compressor, 2 is one end of the compressor 1 on the discharge side. The connected four-way switching valve 3 is an outdoor heat exchanger having one end connected to the other end of the four-way switching valve 2, and the reference numeral 4 is an electric expansion valve having one end connected to the other end of the outdoor heat exchanger 3. Reference numeral 5 denotes an indoor heat exchanger having one end connected to the other end of the electric expansion valve 4 and the other end connected to the suction side of the compressor 1 via the four-way switching valve 2. The air conditioner includes a temperature sensor 11 for detecting a discharge pipe temperature of the compressor 1, a temperature sensor 12 for detecting a refrigerant temperature of the outdoor heat exchanger 3, a temperature sensor 13 for detecting an outdoor air temperature, and an indoor heat exchange. Temperature sensor 14 for detecting the refrigerant temperature of the heater 5 and a temperature sensor 15 for detecting the indoor temperature
A temperature sensor 16 for detecting a refrigerant temperature on the suction side of the compressor 1 and a control device 7 for receiving signals from the temperature sensors 11 to 16 and controlling the compressor 1, the electric expansion valve 4, and the like.
And Further, a closing valve 21 is provided between the electric expansion valve 4 and the indoor heat exchanger 5, and a closing valve 24 is provided between the indoor heat exchanger 5 and the four-way switching valve 2. .
【００１５】上記圧縮機１,四路切換弁２,室外熱交換器
３,電動膨張弁４,制御装置７,閉鎖弁２１,閉鎖弁２４,
温度センサ１１〜１３,温度センサ１６および室外ファ
ン(図示せず)で室外ユニット１０を構成すると共に、室
内熱交換器５,温度センサ１４,温度センサ１５および室
内ファン(図示せず)で室内ユニット２０を構成してい
る。The compressor 1, the four-way switching valve 2, the outdoor heat exchanger 3, the electric expansion valve 4, the control device 7, the closing valve 21, the closing valve 24,
The outdoor unit 10 is constituted by the temperature sensors 11 to 13, the temperature sensor 16 and the outdoor fan (not shown), and the indoor unit is constituted by the indoor heat exchanger 5, the temperature sensor 14, the temperature sensor 15 and the indoor fan (not shown). 20.
【００１６】上記構成の空気調和機では、Ｒ３２冷媒と
冷凍機油とからなる作動媒体を用いている。そして、冷
房運転時、四路切換弁２を実線の切換え位置に切り換え
て、圧縮機１を起動すると、圧縮機１から吐出された高
圧冷媒が四路切換弁２を通って室外熱交換器３に入る。
そして、上記室外熱交換器３で凝縮した冷媒が電動膨張
弁４で減圧された後、連絡配管２２を通って室内熱交換
器５に入る。上記室内熱交換器５で蒸発した冷媒が連絡
配管２３,四路切換弁２を介して圧縮機１の吸入側に戻
る。こうして、上記圧縮機１,室外熱交換器３,電動膨張
弁４および室内熱交換器５で構成された冷媒回路をＲ３
２冷媒を含む作動媒体が循環して、冷凍サイクルを実行
する。そして、室内ファン(図示せず)により室内熱交換
器５を介して室内空気を循環させることにより室内を冷
房する。In the air conditioner having the above structure, a working medium composed of R32 refrigerant and refrigerating machine oil is used. During the cooling operation, when the four-way switching valve 2 is switched to the solid line switching position and the compressor 1 is started, the high-pressure refrigerant discharged from the compressor 1 passes through the four-way switching valve 2 and passes through the outdoor heat exchanger 3. to go into.
After the refrigerant condensed in the outdoor heat exchanger 3 is depressurized by the electric expansion valve 4, the refrigerant enters the indoor heat exchanger 5 through the communication pipe 22. The refrigerant evaporated in the indoor heat exchanger 5 returns to the suction side of the compressor 1 via the communication pipe 23 and the four-way switching valve 2. Thus, the refrigerant circuit composed of the compressor 1, the outdoor heat exchanger 3, the electric expansion valve 4, and the indoor heat exchanger 5
The working medium containing the two refrigerants circulates to execute a refrigeration cycle. Then, the room is cooled by circulating room air through the indoor heat exchanger 5 by an indoor fan (not shown).
【００１７】本出願人は、Ｒ４１０Ａ,Ｒ３２冷媒につ
いて冷媒充填量に対するＣＯＰを実験により調べた。こ
の実験は、ＪＩＳＣ９６１２に準拠した冷房標準条件お
よび暖房標準条件で行った。図２はその実験の結果を示
しており、図２において、横軸が冷媒充填量であり、縦
軸がＣＯＰ比(Ｒ４１０ＡのＣＯＰに対するＲ３２のＣ
ＯＰの比率)である。図２に示すように、Ｒ４１０Ａ冷
媒では、冷房時と暖房時でＣＯＰが最大となる最適冷媒
量が異なり、暖房時の冷媒充填量が少ない。一方、Ｒ３
２冷媒では、冷房時と暖房時でＣＯＰが最大となる最適
冷媒量が異なり、暖房時の冷媒充填量が少ないと共に、
いずれの最適冷媒量もＲ４１０Ａ冷媒より少なく、かつ
ＣＯＰが高くなった。さらに、Ｒ３２冷媒は、冷房時と
暖房時でＣＯＰが最大となる最適冷媒量の差がＲ４１０
Ａ冷媒よりも小さいことが分かった。The present applicant has experimentally examined the COP with respect to the refrigerant charging amount for the R410A and R32 refrigerants. This experiment was performed under standard cooling and heating conditions in accordance with JIS C9612. FIG. 2 shows the results of the experiment. In FIG. 2, the horizontal axis represents the refrigerant charge, and the vertical axis represents the COP ratio (C of R32 with respect to COP of R410A).
OP ratio). As shown in FIG. 2, in the R410A refrigerant, the optimal refrigerant amount at which the COP is maximum differs between the time of cooling and the time of heating, and the amount of refrigerant charged during heating is small. On the other hand, R3
In the two refrigerants, the optimal refrigerant amount at which the COP becomes maximum differs between the time of cooling and the time of heating, and the amount of refrigerant charged during heating is small,
Each of the optimum refrigerant amounts was smaller than the R410A refrigerant, and the COP was higher. Further, in the R32 refrigerant, the difference in the optimum refrigerant amount at which the COP is maximum between the time of cooling and the time of heating is R410.
It was found to be smaller than the refrigerant A.
【００１８】また、Ｒ４１０Ａ,Ｒ２２およびＲ３２冷
媒において空気調和機の冷凍能力に対するアキュームレ
ータおよびレシーバに必要な最小容積を実験により調べ
た。その実験の結果、図３に示すように、冷凍能力が小
さくなるほど、必要な冷媒充填量が少なくなるので、Ｒ
４１０Ａ,Ｒ２２およびＲ３２冷媒のいずれもアキュー
ムレータおよびレシーバの容積は小さくなるが、Ｒ４１
０Ａ,Ｒ２２冷媒よりもＲ３２冷媒の方がアキュームレ
ータおよびレシーバの容積は小さくなった。そして、図
３から明らかなように、Ｒ３２冷媒を用いた空気調和機
では、冷凍能力が４ｋＷ以上では、通常は小〜中型の空
気調和機にアキュームレータおよびレシーバが要るが、
熱交換器容量等のシステム全体の容量調整により、アキ
ュームレータおよびレシーバ自体を備えなくても、冷媒
量調整を可能にでき得る。つまり、空気調和機を可及的
にアキュームレータ,レシーバレスの構成にすることが
できる。The minimum volumes required for the accumulator and the receiver with respect to the refrigeration capacity of the air conditioner in the R410A, R22 and R32 refrigerants were experimentally examined. As a result of the experiment, as shown in FIG. 3, the smaller the refrigerating capacity is, the smaller the required refrigerant charge is.
In all of the refrigerants 410A, R22 and R32, the volume of the accumulator and the receiver becomes small,
The capacity of the accumulator and the receiver was smaller in the R32 refrigerant than in the 0A, R22 refrigerant. And, as is clear from FIG. 3, in the air conditioner using the R32 refrigerant, when the refrigerating capacity is 4 kW or more, the small to medium air conditioners usually require an accumulator and a receiver,
By adjusting the capacity of the entire system such as the heat exchanger capacity, it may be possible to adjust the amount of the refrigerant without providing the accumulator and the receiver itself. That is, the air conditioner can be configured as much as possible without accumulators and receivers.
【００１９】したがって、上記空気調和機によれば、Ｒ
３２冷媒を用いて、アキュームレータおよびレシーバを
無くすことが可能となり、コスト低減と小型化が図るこ
とができる。Therefore, according to the above air conditioner, R
By using 32 refrigerants, the accumulator and the receiver can be eliminated, and cost reduction and size reduction can be achieved.
【００２０】また、冷凍能力が４ｋＷ以下であれば、確
実にアキュームレータおよびレシーバを無くすことがで
きる。If the refrigerating capacity is 4 kW or less, the accumulator and the receiver can be surely eliminated.
【００２１】上記実施の形態では、冷凍装置として空気
調和機について説明したが、他の冷凍装置にこの発明を
適用してもよい。In the above embodiment, the air conditioner has been described as a refrigerating device, but the present invention may be applied to other refrigerating devices.
【００２２】また、上記実施の形態では、冷凍装置とし
てＲ３２冷媒を用いた空気調和機について説明したが、
冷凍装置に用いられる冷媒はこれに限らず、Ｒ３２を少
なくとも７０重量％以上含む混合冷媒でもよい。例え
ば、Ｒ３２冷媒とＣＯ2との混合冷媒であって、ＣＯ2に
対してＲ３２冷媒が７０重量％以上かつ９０重量％以下
の混合冷媒でもよし、Ｒ３２冷媒とＲ２２冷媒との混合
冷媒であって、Ｒ２２冷媒に対してＲ３２冷媒が７０重
量％以上かつ９０重量％以下の混合冷媒でもよい。In the above embodiment, the air conditioner using the R32 refrigerant as the refrigerating device has been described.
The refrigerant used in the refrigeration apparatus is not limited to this, and may be a mixed refrigerant containing at least 70% by weight of R32. For example, a mixed refrigerant of R32 refrigerant and CO 2 , a mixed refrigerant of 70% by weight or more and 90% by weight or less of R32 refrigerant with respect to CO 2 or a mixed refrigerant of R32 refrigerant and R22 refrigerant. R32 refrigerant may be a mixed refrigerant of 70% by weight or more and 90% by weight or less with respect to R22 refrigerant.
【００２３】[0023]
【発明の効果】以上より明らかなように、この発明の冷
凍装置によれば、熱搬送能力が高いＲ３２冷媒またはＲ
３２を少なくとも７０重量％以上含む混合冷媒を用いる
ことによって、Ｒ４１０Ａ冷媒に比べて少ない冷媒充填
量で十分な能力が得られると共に、Ｒ４１０Ａ冷媒に比
べて冷房時の最適冷媒量と暖房時の最適冷媒量との差が
少ないので、アキュームレータやレシーバを無くすこと
ができ、コスト低減と小型化を図ることができる。ま
た、冷媒充填量を低減できるため、直接的な地球温暖化
の値も低減できるため、Ｒ３２の低ＧＷＰ化および省エ
ネルギー化による地球環境対応が可能な冷凍装置を容易
に提供できるメリットがある。As is clear from the above, according to the refrigerating apparatus of the present invention, the R32 refrigerant or R32 having a high heat transfer capacity is provided.
By using a mixed refrigerant containing at least 70% by weight or more of 32, sufficient capacity can be obtained with a smaller refrigerant charge amount than that of the R410A refrigerant, and an optimal refrigerant amount for cooling and an optimal refrigerant for heating as compared with the R410A refrigerant. Since there is little difference from the amount, an accumulator and a receiver can be eliminated, and cost reduction and size reduction can be achieved. In addition, since the amount of refrigerant to be charged can be reduced, the value of direct global warming can also be reduced, so that there is an advantage that a refrigeration apparatus capable of responding to the global environment by reducing GWP of R32 and saving energy can be easily provided.
【００２４】また、冷凍能力が４ｋＷ以下にすることに
よって、確実にアキュームレータやレシーバを無くすこ
とができる。Further, by setting the refrigerating capacity to 4 kW or less, the accumulator and the receiver can be surely eliminated.
【図１】 図１はこの発明の実施の一形態の冷凍装置と
しての空気調和機の概略構成を示す回路図である。FIG. 1 is a circuit diagram showing a schematic configuration of an air conditioner as a refrigeration apparatus according to one embodiment of the present invention.
【図２】 図２はＲ４１０Ａ冷媒とＲ３２冷媒について
の冷房時と暖房時の冷媒充填量に対するＣＯＰを示す図
である。FIG. 2 is a diagram showing COP with respect to a refrigerant charging amount during cooling and during heating for R410A refrigerant and R32 refrigerant.
【図３】 図３はＲ４１０Ａ,Ｒ２２冷媒とＲ３２冷媒
の冷凍能力に対するアキュームレータおよびレシーバの
容積を示す図である。FIG. 3 is a diagram showing the capacity of an accumulator and a receiver with respect to the refrigerating capacity of R410A, R22 refrigerant and R32 refrigerant.
１…圧縮機、２…四路切換弁、３…室外熱交換器、４…
電動膨張弁、５…室外熱交換器、７…制御装置、１０…
室外ユニット、２０…室内ユニット。DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Four-way switching valve, 3 ... Outdoor heat exchanger, 4 ...
Electric expansion valve, 5 ... outdoor heat exchanger, 7 ... control device, 10 ...
Outdoor unit, 20 ... indoor unit.
Claims (4)
よび蒸発器(５)が環状に接続された冷媒回路に、Ｒ３２
冷媒またはＲ３２を少なくとも７０重量％以上含む混合
冷媒を用いた冷凍装置であって、上記冷媒回路にアキュ
ームレータを有しないことを特徴とする冷凍装置。1. A refrigerant circuit in which a compressor (1), a condenser (3), a depressurizing means (4) and an evaporator (5) are connected in an annular manner has R32.
A refrigerating apparatus using a refrigerant or a mixed refrigerant containing at least 70% by weight of R32, wherein the refrigerating circuit does not have an accumulator.
よび蒸発器(５)が環状に接続された冷媒回路に、Ｒ３２
冷媒またはＲ３２を少なくとも７０重量％以上含む混合
冷媒を用いた冷凍装置であって、上記冷媒回路にレシー
バを有しないことを特徴とする冷凍装置。2. A refrigerant circuit in which a compressor (1), a condenser (3), a depressurizing means (4) and an evaporator (5) are connected in an annular manner, R32 is provided.
A refrigerating apparatus using a refrigerant or a mixed refrigerant containing at least 70% by weight of R32, wherein the refrigerating circuit does not have a receiver.
よび蒸発器(５)が環状に接続された冷媒回路に、Ｒ３２
冷媒またはＲ３２を少なくとも７０重量％以上含む混合
冷媒を用いた冷凍装置であって、上記冷媒回路にアキュ
ームレータおよびレシーバを有しないことを特徴とする
冷凍装置。3. A refrigerant circuit in which a compressor (1), a condenser (3), a pressure reducing means (4), and an evaporator (5) are connected in a ring shape, R32 is provided.
A refrigerating apparatus using a refrigerant or a mixed refrigerant containing at least 70% by weight of R32, wherein the refrigerating circuit does not include an accumulator and a receiver.
冷凍装置において、冷凍能力が４ｋＷ以下であることを
特徴とする冷凍装置。4. The refrigeration apparatus according to claim 1, wherein the refrigeration capacity is 4 kW or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36997399A JP4543469B2 (en) | 1999-12-27 | 1999-12-27 | Refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36997399A JP4543469B2 (en) | 1999-12-27 | 1999-12-27 | Refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001183020A true JP2001183020A (en) | 2001-07-06 |
| JP4543469B2 JP4543469B2 (en) | 2010-09-15 |
Family
ID=18495768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36997399A Expired - Lifetime JP4543469B2 (en) | 1999-12-27 | 1999-12-27 | Refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4543469B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004109199A1 (en) | 2003-06-06 | 2004-12-16 | Daikin Industries, Ltd. | Air conditioner |
| JP2006125789A (en) * | 2004-11-01 | 2006-05-18 | Fuji Electric Holdings Co Ltd | Cooling device and automatic vending machine therewith |
| US7080522B2 (en) * | 2000-01-04 | 2006-07-25 | Daikin Industries, Ltd. | Car air conditioner and car with its conditioner |
| WO2012043617A1 (en) | 2010-09-28 | 2012-04-05 | 出光興産株式会社 | Lubricant oil composition for compression refrigerator |
| WO2013005647A1 (en) | 2011-07-01 | 2013-01-10 | 出光興産株式会社 | Lubricant oil composition for compression refrigerator |
| WO2013005645A1 (en) | 2011-07-01 | 2013-01-10 | 出光興産株式会社 | Lubricant oil composition for compression refrigerator |
| JP2013200090A (en) * | 2012-03-26 | 2013-10-03 | Hitachi Appliances Inc | Refrigeration cycle device |
| CN103868311A (en) * | 2012-12-14 | 2014-06-18 | 无锡艾科瑞思产品设计与研究有限公司 | Refrigerator anti-theft frame |
Families Citing this family (2)
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|---|---|---|---|---|
| JP7007839B2 (en) | 2017-08-31 | 2022-01-25 | 川崎重工業株式会社 | Articulated robot |
| JP7391811B2 (en) | 2020-09-29 | 2023-12-05 | 三菱重工サーマルシステムズ株式会社 | refrigeration machine |
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| WO2013005645A1 (en) | 2011-07-01 | 2013-01-10 | 出光興産株式会社 | Lubricant oil composition for compression refrigerator |
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| US9902917B2 (en) | 2011-07-01 | 2018-02-27 | Idemitsu Kosan Co., Ltd. | Lubricant oil composition for compression refrigerator |
| KR20190052720A (en) | 2011-07-01 | 2019-05-16 | 이데미쓰 고산 가부시키가이샤 | Lubricant oil composition for compression refrigerator |
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| CN103868311A (en) * | 2012-12-14 | 2014-06-18 | 无锡艾科瑞思产品设计与研究有限公司 | Refrigerator anti-theft frame |
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