JPH0360023B2 - - Google Patents
Info
- Publication number
- JPH0360023B2 JPH0360023B2 JP57176718A JP17671882A JPH0360023B2 JP H0360023 B2 JPH0360023 B2 JP H0360023B2 JP 57176718 A JP57176718 A JP 57176718A JP 17671882 A JP17671882 A JP 17671882A JP H0360023 B2 JPH0360023 B2 JP H0360023B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- refrigerant
- compressor
- liquid
- liquid separator
- 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
- 239000003507 refrigerant Substances 0.000 claims description 51
- 239000007788 liquid Substances 0.000 claims description 46
- 238000002347 injection Methods 0.000 claims description 27
- 239000007924 injection Substances 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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
- F25B2400/05—Compression system with heat exchange between particular parts of the system
-
- 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
- F25B2400/13—Economisers
-
- 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
- F25B2400/23—Separators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
【発明の詳細な説明】
本発明は、ヒートポンプ式暖房装置に関し、特
に気液分離器を備え、該気液分離器で分離された
中間圧ガス冷媒を圧縮機の圧縮行程中にインジエ
クシヨンするようにした中間圧ガスインジエクシ
ヨンタイプのものの改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat pump type heating device, and more particularly, to a heat pump type heating device, which is equipped with a gas-liquid separator, and injects intermediate-pressure gas refrigerant separated by the gas-liquid separator during the compression stroke of a compressor. This invention relates to an improvement of intermediate pressure gas injection type.
従来、このような中間圧ガスインジエクシヨン
タイプのヒートポンプ式暖房装置は、特開昭54−
6162号公報に開示されているように、圧縮機と、
凝縮器としての室内熱交換器と、キヤピラリチユ
ーブ等よりなる膨張機構と、該膨張機構の中間に
配設された気液分離器と、蒸発器としての室外熱
交換器とを備え、圧縮機から吐出されたガス冷媒
を室内熱交換器（凝縮器）で凝縮しのちち膨張機
構で減圧し、その間で気液分離器でガス冷媒と液
冷媒とに分離して、そのガス部の中間圧のガス冷
媒を上記圧縮機の圧縮行程中にインジエクシヨン
する一方、液部の液冷媒を室外熱交換器（蒸発
器）で気化した後上記圧縮機へ吸入し、該圧縮機
で上記中間ガス冷媒と共に圧縮するというサイク
ルを繰り返すことにより、上記中間圧ガス冷媒に
よる冷媒循環量の増大により暖房能力の向上を図
るとともに、中間圧ガス冷媒量と圧縮仕事量とを
最適化してエネルギ効率の改善を図るようにした
ものである。 Conventionally, such an intermediate pressure gas injection type heat pump type heating device was developed in Japanese Patent Application Laid-Open No. 1986-
As disclosed in Publication No. 6162, a compressor;
The compressor is equipped with an indoor heat exchanger as a condenser, an expansion mechanism including a capillary tube, a gas-liquid separator disposed in the middle of the expansion mechanism, and an outdoor heat exchanger as an evaporator. The gas refrigerant discharged from the chamber is condensed in an indoor heat exchanger (condenser) and then depressurized by an expansion mechanism.In between, the gas refrigerant is separated into gas refrigerant and liquid refrigerant in a gas-liquid separator, and the intermediate pressure of the gas section is reduced. The gas refrigerant is injected during the compression stroke of the compressor, while the liquid refrigerant in the liquid part is vaporized in an outdoor heat exchanger (evaporator) and then sucked into the compressor, where it is injected together with the intermediate gas refrigerant. By repeating the cycle of compression, heating capacity is improved by increasing the amount of refrigerant circulated by the intermediate pressure gas refrigerant, and energy efficiency is improved by optimizing the amount of intermediate pressure gas refrigerant and compression work. This is what I did.
しかるに、上記従来のものでは、圧縮機内のガ
ス冷媒のもつ熱量の一部が圧縮機本体から外部へ
放熱することにより生ずるヒートロスに対しては
何ら対策が施されておらず、暖房能力の向上を充
分に図ることができないという問題があつた。 However, in the above conventional systems, no countermeasures are taken against heat loss caused by part of the heat of the gas refrigerant in the compressor being radiated from the compressor body to the outside, and it is difficult to improve the heating capacity. There was a problem that it was not possible to plan adequately.
そこで、本発明はかかる点に鑑みてなされたも
のであり、上記圧縮機本体からの放出熱を、気液
分離器で分離された液冷媒の一部に給熱して、該
液冷媒の気化により中間圧ガス冷媒発生量を増加
させることにより、ヒートロスとして外部へ放出
される熱量を回収利用して暖房能力の向上を図り
得るようにすることを目的とするものである。 Therefore, the present invention has been made in view of this point, and it supplies heat released from the compressor main body to a part of the liquid refrigerant separated by the gas-liquid separator, and vaporizes the liquid refrigerant. The purpose is to increase the amount of intermediate-pressure gas refrigerant generated, thereby recovering and utilizing the amount of heat released to the outside as heat loss, thereby improving the heating capacity.
この目的を達成するため、本発明の構成は、圧
縮機と、膨張機構および該膨張機構の中間部に配
設された気液分離器と、蒸発器とを備え、上記気
液分離器で分離されたガス部のガス冷媒をガスイ
ンジエクシヨン管を介して圧縮機の圧縮行程中に
インジエクシヨンするようにしたヒートポンプ式
暖房装置において、上記ガスインジエクシヨン管
の途中に、該ガスインジエクシヨン管内の冷媒を
圧縮機からの放出熱で加熱する熱交換部を設ける
とともに、該ガスインジエクシヨン管の上記熱交
換部より上流側をバイパス管によつて気液分離器
の液部に接続し、該気液分離器で分離された液冷
媒の一部をガスインジエクシヨン管の熱交換部に
導入することにより、上記圧縮機からの放出熱を
低減させるようにしたものである。 In order to achieve this object, the configuration of the present invention includes a compressor, an expansion mechanism, a gas-liquid separator disposed in an intermediate part of the expansion mechanism, and an evaporator, and the gas-liquid separator separates In a heat pump heating system in which the gas refrigerant in the gas section is injected during the compression stroke of the compressor through a gas injection exit pipe, a gas refrigerant inside the gas injection exit pipe is a heat exchange section for heating the refrigerant with the heat released from the compressor, and the upstream side of the heat exchange section of the gas injection pipe is connected to the liquid section of the gas-liquid separator by a bypass pipe; By introducing a portion of the liquid refrigerant separated by the gas-liquid separator into the heat exchange section of the gas injection tube, the heat released from the compressor is reduced.
以下、本発明の実施例を図面に基づいて詳細に
説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は、本発明をヒートポンプ式冷暖房装置
に適用した場合の冷暖房回路を示し、１は圧縮
機、２は四路切換弁、３は暖房運転時凝縮器とし
て機能し、冷房運転時蒸発器として機能する室内
熱交換器、４および５は膨張機構としての第１お
よび第２のキヤピラリチユーブ、６は両キヤピラ
リチユーブ４，５間に配設された気液分離器、７
は暖房運転時蒸発器として機能し、冷房運転時凝
縮器として機能する室外熱交換器であり、それぞ
れ冷媒通路としての連絡用配管８〜１５により接
続されている。 FIG. 1 shows a heating and cooling circuit when the present invention is applied to a heat pump air-conditioning system, in which 1 functions as a compressor, 2 functions as a four-way selector valve, and 3 functions as a condenser during heating operation, and an evaporator during cooling operation. 4 and 5 are first and second capillary tubes serving as expansion mechanisms; 6 is a gas-liquid separator disposed between both capillary tubes 4 and 5; 7
is an outdoor heat exchanger that functions as an evaporator during heating operation and as a condenser during cooling operation, and is connected to each other by communication pipes 8 to 15 as refrigerant passages.
また、１６は、上記気液分離器６のガス部６ａ
と圧縮機１の圧縮行程途中部とを接続するガスイ
ンジエクシヨン管、１７は該ガスインジエクシヨ
ン管１６の途中に介設され、暖房運転時に開作動
する電磁弁である。而して、暖房運転時、四路切
換弁２を実線の如く切換えて冷媒を矢印の如く流
通せしめるとともに、電磁弁１７の開作動により
気液分離器６で分離されたガス部６ａの中間圧ガ
ス冷媒をガスインジエクシヨン管１６を介して圧
縮機１の圧縮行程中にインジエクシヨンとして冷
媒循環量を増加させたインジエクシヨン方式によ
る暖房運転を行う一方、冷房運転時、四路切換弁
２を破線の如く切換えて冷媒を暖房運転時とは逆
方向に流通せしめて冷房運転を行うように構成さ
れている。尚１８はガスインジエクシヨン管１６
の後述する熱交換部２０下流に介設されたインジ
エクシヨン方向へのガス冷媒の流通を許容する逆
止弁、１９はアキユムレータである。 Further, 16 is a gas section 6a of the gas-liquid separator 6.
A gas injection pipe 17 connecting the gas injection pipe 17 and the middle part of the compression stroke of the compressor 1 is a solenoid valve that is interposed in the middle of the gas injection pipe 16 and is opened during heating operation. During heating operation, the four-way switching valve 2 is switched as shown by the solid line to allow the refrigerant to flow as shown by the arrow, and the intermediate pressure of the gas section 6a separated by the gas-liquid separator 6 is reduced by opening the solenoid valve 17. Gas refrigerant is passed through the gas injection extraction pipe 16 during the compression stroke of the compressor 1 to perform heating operation using an injection extraction method that increases the amount of refrigerant circulation. The cooling operation is performed by switching the refrigerant in the opposite direction to that during the heating operation. 18 is the gas injection tube 16
Reference numeral 19 denotes an accumulator, which is a check valve that allows the gas refrigerant to flow in the injection direction, which is provided downstream of the heat exchanger 20, which will be described later.
そして、上記ガスインジエクシヨン管１６の途
中は圧縮機１本体に接触もしくは近接せしめて配
置されて熱交換部２０が設けられ、該ガスインジ
エクシヨン管１６内の冷媒を圧縮機１からの放出
熱で加熱するように構成されている。 A heat exchange section 20 is provided in the middle of the gas injection tube 16 in contact with or in close proximity to the main body of the compressor 1, and discharges the refrigerant in the gas injection tube 16 from the compressor 1. It is configured to be heated with heat.
さらに、上記ガスインジエクシヨン管１６の熱
交換部２０より上流側はバイパス管２１によつて
気液分離器１６の液部６ｂに接続され、該バイパ
ス管２１の途中にはキヤピラリチユーブ２２が介
設されており、該気液分離器６で分離された液部
６ｂの液冷媒の一部を減圧して上記ガスインジエ
クシヨン管１６の熱交換部２０に導入するように
構成されている。 Furthermore, the upstream side of the heat exchange section 20 of the gas injection pipe 16 is connected to the liquid section 6b of the gas-liquid separator 16 by a bypass pipe 21, and a capillary tube 22 is provided in the middle of the bypass pipe 21. It is configured to reduce the pressure of a part of the liquid refrigerant in the liquid section 6b separated by the gas-liquid separator 6 and introduce it into the heat exchange section 20 of the gas injection pipe 16. .
次に、上記実施例の作用について説明するに、
暖房運転時、圧縮機１から吐出された高温高圧ガ
ス冷媒は室内熱交換器３で冷却液化されたのち、
第１キヤピラリチユーブ４で膨張減圧されて気液
分離器６に送られ、該気液分離器６で中間圧ガス
冷媒と液冷媒とに分離され、ガス冷媒はガス部６
ａに、液冷媒は液部６ｂに溜められる。 Next, to explain the operation of the above embodiment,
During heating operation, the high-temperature, high-pressure gas refrigerant discharged from the compressor 1 is cooled and liquefied in the indoor heat exchanger 3, and then
The gas refrigerant is expanded and depressurized in the first capillary tube 4 and sent to the gas-liquid separator 6, where it is separated into intermediate-pressure gas refrigerant and liquid refrigerant.
In a, the liquid refrigerant is stored in the liquid part 6b.
そして、液部６ｂの液冷媒の大部分は第２キヤ
ピラリチユーブ５で減圧されたのち室外熱交換器
７で気化され、低温低圧ガスとなつて圧縮機１に
吸入される。一方、ガス部６ａの中間圧ガス冷媒
はガスインジエクシヨン管１６に送られるととも
に上記液部６ｂの液冷媒の一部はバイパス管２１
を介し、その途中でキヤピラリチユーブ２２によ
り気化しやすい圧力にまで減圧されたのちガスイ
ンジエクシヨン管１６の熱交換部２０上流に導入
混合される。そして、この液冷媒とガス冷媒とに
よつて乾き飽和蒸気直前の湿り飽和蒸気になつた
のち、熱交換部２０において圧縮機１本体からの
放出熱によつて加熱されて過熱蒸気になり、その
結果、ガス部６ａからの中間圧ガス冷媒に加えて
液部６ｂからの液冷媒の一部の気化による中間圧
ガス冷媒の発生により、中間圧ガス冷媒発生量が
増加する。しかる後、この中間圧ガス冷媒は圧縮
機１の圧縮行程中にインジエクシヨンされ、上記
の室外熱交換器７からのガス冷媒と共に圧縮され
る。 Most of the liquid refrigerant in the liquid section 6b is depressurized in the second capillary tube 5, then vaporized in the outdoor heat exchanger 7, and is sucked into the compressor 1 as a low-temperature, low-pressure gas. On the other hand, the intermediate pressure gas refrigerant in the gas section 6a is sent to the gas injection pipe 16, and part of the liquid refrigerant in the liquid section 6b is sent to the bypass pipe 21.
After being reduced to a pressure at which gas is easily vaporized by the capillary tube 22, the gas is introduced and mixed upstream of the heat exchange section 20 of the gas injection tube 16. Then, the liquid refrigerant and the gas refrigerant turn it into wet saturated steam, which is just before dry saturated steam, and then it is heated in the heat exchange section 20 by the heat released from the compressor 1 main body to become superheated steam. As a result, in addition to the intermediate pressure gas refrigerant from the gas section 6a, intermediate pressure gas refrigerant is generated by vaporizing a part of the liquid refrigerant from the liquid section 6b, so that the amount of intermediate pressure gas refrigerant generated increases. Thereafter, this intermediate pressure gas refrigerant is injected during the compression stroke of the compressor 1, and is compressed together with the gas refrigerant from the outdoor heat exchanger 7.
したがつて、圧縮機１本体からの外部へ放熱さ
れる圧縮機１内のガス冷媒のもつ熱量の一部がガ
スインジエクシヨン管１６の熱交換部２０におい
て該ガスインジエクシヨン管１６内の冷媒を加熱
するために有効利用されるので、ひいては上記圧
縮機１からの放出熱を低減することができ、よつ
て暖房能力を向上させることができる。 Therefore, a part of the heat of the gas refrigerant in the compressor 1 that is radiated to the outside from the compressor 1 body is transferred to the heat exchange part 20 of the gas injection extraction pipe 16. Since it is effectively used to heat the refrigerant, the heat released from the compressor 1 can be reduced, and the heating capacity can be improved.
以上説明したように、本発明によれば、中間圧
ガスインジエクシヨンタイプのヒートポンプ式暖
房装置において、気液分離器のガス部からの中間
圧ガス冷媒に加えて、気液分離器の液部からの液
冷媒の一部をガスインジエクシヨン管の熱交換部
で圧縮機本体からの放出熱で加熱気化して中間圧
ガス冷媒を発生させるようにしたので、従来ヒー
トロスとして外部に放出されていた圧縮機本体か
らの放出熱を有効利用して低減させることがで
き、よつて暖房能力の向上を有効に図ることがで
きるものである。 As explained above, according to the present invention, in an intermediate-pressure gas injection type heat pump type heating device, in addition to the intermediate-pressure gas refrigerant from the gas section of the gas-liquid separator, the liquid section of the gas-liquid separator A portion of the liquid refrigerant is heated and vaporized in the heat exchange section of the gas injection tube using the heat released from the compressor body to generate intermediate pressure gas refrigerant. The heat emitted from the compressor body can be effectively used and reduced, and the heating capacity can thus be effectively improved.
図面は本発明の実施例を示す配管系統図であ
る。
１……圧縮機、３……室内熱交換器、４……第
１キヤピラリチユーブ、５……第２キヤピラリチ
ユーブ、６……気液分離器、６ａ……ガス部、６
ｂ……液部、７……室外熱交換器、１６……ガス
インジエクシヨン管、２０……熱交換部、２１…
…バイパス管。
The drawing is a piping system diagram showing an embodiment of the present invention. 1... Compressor, 3... Indoor heat exchanger, 4... First capillary tube, 5... Second capillary tube, 6... Gas-liquid separator, 6a... Gas section, 6
b...Liquid part, 7...Outdoor heat exchanger, 16...Gas injection tube, 20...Heat exchange part, 21...
...bypass pipe.
Claims (1)
よび該膨張機構４，５の中間部に配設された気液
分離器６と、蒸発器７とを備え、上記気液分離器
６で分離されたガス部６ａのガス冷媒をガスイン
ジエクシヨン管１６を介して圧縮機１の圧縮行程
中にインジエクシヨンするようにしたヒートポン
プ式暖房装置において、上記ガスインジエクシヨ
ン管１６の途中に、該ガスインジエクシヨン管１
６内の冷媒を圧縮機１からの放出熱で加熱する熱
交換部２０を設けるとともに、該ガスインジエク
シヨン管１６の上記熱交換部２０より上流側をバ
イパス管２１によつて気液分離器６の液部６ｂに
接続し、該気液分離器６で分離された液冷媒の一
部をガスインジエクシヨン管１６の熱交換部２０
に導入するようにしたことを特徴とするヒートポ
ンプ式暖房装置。1 comprising a compressor 1, a condenser 3, expansion mechanisms 4 and 5, a gas-liquid separator 6 disposed in the middle of the expansion mechanisms 4 and 5, and an evaporator 7, the gas-liquid separator In a heat pump type heating system in which the gas refrigerant in the gas section 6a separated at 6 is injected through the gas injection expulsion pipe 16 during the compression stroke of the compressor 1, there is a , the gas injection tube 1
A heat exchange section 20 is provided for heating the refrigerant in the compressor 1 with the heat released from the compressor 1, and a gas-liquid separator is provided on the upstream side of the heat exchange section 20 of the gas injection pipe 16 by a bypass pipe 21. 6, and a part of the liquid refrigerant separated by the gas-liquid separator 6 is transferred to the heat exchange section 20 of the gas injection pipe 16.
A heat pump type heating device characterized in that it is installed in a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17671882A JPS5966662A (en) | 1982-10-06 | 1982-10-06 | Heat pump type heating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17671882A JPS5966662A (en) | 1982-10-06 | 1982-10-06 | Heat pump type heating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5966662A JPS5966662A (en) | 1984-04-16 |
| JPH0360023B2 true JPH0360023B2 (en) | 1991-09-12 |
Family
ID=16018549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17671882A Granted JPS5966662A (en) | 1982-10-06 | 1982-10-06 | Heat pump type heating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5966662A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2441960B1 (en) | 2009-06-11 | 2017-06-21 | Mitsubishi Electric Corporation | Refrigerant compressor and heat pump device |
| WO2013027237A1 (en) * | 2011-08-22 | 2013-02-28 | 三菱電機株式会社 | Two-stage compressor, and heat pump device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5123158A (en) * | 1974-08-20 | 1976-02-24 | Tokico Ltd | EKISHOHYOJIPANERU |
| JPS5693568A (en) * | 1979-12-28 | 1981-07-29 | Seiko Epson Corp | Printing device |
| JPS57120061A (en) * | 1981-01-17 | 1982-07-26 | Nippon Denso Co | Refrigeration cycle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6317970Y2 (en) * | 1981-04-08 | 1988-05-20 | ||
| JPS57169958U (en) * | 1981-04-17 | 1982-10-26 |
-
1982
- 1982-10-06 JP JP17671882A patent/JPS5966662A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5123158A (en) * | 1974-08-20 | 1976-02-24 | Tokico Ltd | EKISHOHYOJIPANERU |
| JPS5693568A (en) * | 1979-12-28 | 1981-07-29 | Seiko Epson Corp | Printing device |
| JPS57120061A (en) * | 1981-01-17 | 1982-07-26 | Nippon Denso Co | Refrigeration cycle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5966662A (en) | 1984-04-16 |
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