JP3565276B2 - Heat pump type air conditioner - Google Patents

Heat pump type air conditioner Download PDF

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JP3565276B2
JP3565276B2 JP2002138147A JP2002138147A JP3565276B2 JP 3565276 B2 JP3565276 B2 JP 3565276B2 JP 2002138147 A JP2002138147 A JP 2002138147A JP 2002138147 A JP2002138147 A JP 2002138147A JP 3565276 B2 JP3565276 B2 JP 3565276B2
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air
passage
return
path
exhaust
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JP2003329289A (en
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恵一 木村
多門 清滝
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木村工機株式会社
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]

Description

【0001】
【発明の属する技術分野】
本発明はヒートポンプ式空調機に関する。
【0002】
【従来の技術】
従来、ヒートポンプ式のルームエアコンは、冷暖房運転のみで外気処理は別の機器で行う必要があった。また、還気を室内機の蒸発器で熱交換して給気し、蒸発器で熱交換した冷媒を、室外機の凝縮器へ送風される外気で熱交換している。
【0003】
【発明が解決しようとする課題】
したがって、外気処理用の機器の設備費が余分にかかり、室内機と室外機をつなぐ配管工事が必要となる。また、外気で凝縮器を熱交換するため効率が悪く、極寒地や酷暑地での使用に制限があった。そこで、これらの問題点を解決するヒートポンプ式空調機を提供することを目的とする。
【0004】
【課題を解決するための手段】
上記目的を達成するために、本発明のヒートポンプ式空調機は、ケーシング内に、冷媒循環回路を構成する蒸発器、凝縮器及び圧縮機と、還気と外気が通る前記蒸発器を設けた給気送風路と、還気と外気が通る前記凝縮器を設けた排気送風路と、を備え、前記排気送風路に風量制御自在な凝縮用送風機を設け、熱負荷に応じて前記凝縮用送風機の風量制御を行う制御手段を、備えたものである。さらに、給気送風路に風量制御自在な蒸発用送風機を設け、熱負荷に応じて凝縮用送風機と前記蒸発用送風機の風量制御を行う制御手段とした。さらに、容量制御自在な圧縮機とし、熱負荷に応じて凝縮用送風機と蒸発用送風機の風量制御と前記圧縮機の容量制御を行う制御手段とした。さらに、ケーシング内に還気送風路を備え、このケーシングに、給気送風路と排気送風路に連通する外気取入口を、形成し、前記排気送風路と前記給気送風路と前記還気送風路を三列に隣接させると共にその列方向一端部において前記給気送風路と前記還気送風路を連通連結させかつ前記排気送風路と前記還気送風路を連通連結させて前記ケーシングを形成した。さらに、給気送風路に連通する又は給気送風路と還気送風路に連通するダクト用チャンバを、設け、このチャンバに、空気清浄機構を収納・取出自在に内装させた。さらに、冷媒循環回路を、ケーシングに対して取出・収納自在に構成した。さらに、蒸発器と凝縮器のフィンチューブを楕円管で構成した。
【0005】
【発明の実施の形態】
図1〜図4は、本発明のヒートポンプ式空調機の一実施例を示しており、この空調機は、ケーシング1内に、冷媒循環回路Cを構成する蒸発器2、凝縮器3及び圧縮機4と、還気と外気が通る蒸発器2を設けた給気送風路Aと、還気と外気が通る凝縮器3を設けた排気送風路Bと、還気送風路Eと、を備えている。ケーシング1には、外気取入口7、給気口8、還気口9及び排気口10を形成し、外気取入口7と給気口8を給気送風路Aにて連通連結し、外気取入口7と排気口10を排気送風路Bにて連通連結し、還気口9を還気送風路Eに連通連結する。なお、実線及び点線の白抜き矢印で風向き(送風方向)を示す。
【0006】
排気送風路Bと給気送風路Aと還気送風路Eは三列に隣接させると共にその列方向一端部において給気送風路Aと還気送風路Eを連通連結させかつ排気送風路Bと還気送風路Eを連通連結させてケーシング1を扁平状に形成する。外気取入口7と、外気取入口7より風上の給気送風路Aと還気送風路Eの連通部と、外気取入口7より風上の排気送風路Bと還気送風路Eの連通部には、夫々風量調整ダンパを設ける。
【0007】
さらに、給気送風路Aと還気送風路Eに連通するダクト用チャンバ5を、設け、このチャンバ5に、空気清浄機構6を収納・取出自在に内装させる。空気清浄機構6は、例えば花粉やタバコなどの除塵・脱臭・殺菌を行う光触媒フィルタなどで構成すればよいが、これ以外の電気式機器などで構成するも自由である。チャンバ5と給気送風路Aと還気送風路Eと屋内とはダクトなどを介して連通連結するが、チャンバ5と給気送風路Aと還気送風路Eを直接連通連結してもよい。図例ではチャンバ5は内部を2分割し、給気送風路Aに連通する分割空室に空気清浄機構6を設けているが、内部を分割せずに給気送風路Aのみに連通させて空気清浄機構6を内装してもよく、その場合は、還気送風路Eと屋内をダクトなどで連通連結する。
【0008】
冷媒循環回路Cは、蒸発器2、凝縮器3、圧縮機4、図示省略の受液器、膨張弁及び冷媒循環方向の切換弁等を配管接続して成り、蒸発器2及び凝縮器3の吸熱と放熱を切換自在に構成する。凝縮器3と蒸発器2は隣合わせて設けて、冷媒循環回路Cに占める容積を最小限に抑える。凝縮器3と蒸発器2のフィンチューブは低圧損の楕円管で構成する(図5参照)のが好ましいが円形管でもよい。
【0009】
冷媒循環回路Cは、ケーシング1に対して取出・収納自在に構成する。例えば、ケーシング1内に着脱自在に取付けられるフレーム13に、冷媒循環回路Cを固定して一体化し、ケーシング1の一面に開口部を形成し、この開口部に対して冷媒循環回路付フレーム13を取出・収納自在に構成する。開口部には、着脱又は開閉自在な外装板を設ける。なお、前述以外の構成で冷媒循環回路Cを取出・収納自在に設けるも自由である。
【0010】
排気送風路Bには風量制御自在な凝縮用送風機12を設け、給気送風路Aに風量制御自在な蒸発用送風機11を設ける。送風機11、12はインバータ制御などで風量(翼回転数)制御自在に構成する。圧縮機4は、インバータ制御などで容量制御自在に構成する。Dは制御手段で、熱負荷の変動に応じて凝縮用送風機12と蒸発用送風機11の風量制御と圧縮機4の容量制御を段階的又は比例的に行う。例えば、冷房負荷又は暖房負荷が大きくなると凝縮器風量と蒸発器風量と圧縮機容量を適宜増加させ、冷房負荷又は暖房負荷が小さくなると凝縮器風量と蒸発器風量と圧縮機容量を適宜減少させる。なお、制御手段Dは例えばセンサーやマイコンなどで構成する。
【0011】
このヒートポンプ式空調機では、還気口9から取入れた還気(屋内からの排気)と外気取入口7から取入れた外気を蒸発器2の流通冷媒で熱交換し、必要に応じて加湿器14を作動させて給気口8から給気し、同時に還気口9から取入れた還気と外気取入口7から取入れた外気で凝縮器3の流通冷媒を熱交換して吸熱又は放熱し排気口10から屋外へ排気する。このようにして還気熱を利用して凝縮器3の熱交換負荷を下げることができ、あたかも全熱交換器を用いたような効果を凝縮器3で得ることができる。このとき、凝縮器風量を増加させることにより圧縮機4の性能限界以上の熱量(冷暖房能力)を得ることができ、成績係数(COP)が向上する。なお、熱負荷が小さくなって圧縮機容量を減少させる場合、定風量の送風機では無駄に送風電力を消費するが、本発明では送風機の風量を減らして省エネ化を図れる。また、複数の送風機を運転・停止することにより風量制御する場合と比べて安価で細かく能力調整できる。
【0012】
なお、熱負荷に応じて凝縮用送風機12と蒸発用送風機11の風量制御のみを行う制御手段Dとしたり、凝縮用送風機12の風量制御のみを行う制御手段Dとして、能力調整するも自由である。外気取入口7は給気送風路Aと排気送風路Bに別々に1つずつ連通させる以外に、給気送風路Aと排気送風路Bにまたがるように設けて1つとしてもよい。また、排気送風路Bと給気送風路Aと還気送風路Eの配列順序の変更は自由であり、送風機11、12は吸込み式でなく押込み式とするも自由である。
【0013】
【発明の効果】
請求項1の発明では、1台の空調機で冷暖房運転と換気などの外気処理ができ、配管工事が不要となる。還気熱を利用して凝縮器を運転できるので熱交換能力が高く冷媒循環回路を小型化できて省エネを図れ、全熱交換器などの余分な外気処理用機器が不要となり、空調機全体をコンパクト化でき、設置スペースが少なくて済み、設備コスト及びランニングコストの低減を図れる。細かく空調機の能力調整ができ、成績係数が向上して省エネとなり、圧縮機を大型化せずとも極寒地から酷暑地まで広範囲の地域で使用できる。圧縮機の容量制御を加えることにより、一層細かく能力調整を行うことができる。排気送風路と給気送風路と還気送風路を三列にしてケーシングを扁平状にし、その列方向他端部に屋内と連通する給気口や還気口を設けることができるので、空調機を壁などに沿って僅かな床面積で容易に設置し得る。
請求項の発明では、高度な外気処理を行えるので病院やクリーンルームなどにも使用できる。チャンバを空気清浄機構のケーシングに兼用でき、空気清浄機構の保守や設置が容易で、空調機のコンパクト化も図れる。
請求項の発明では、ケーシング全体を取り外すことなく冷媒循環回路のみをケーシングから取出して冷媒回収作業やメンテナンスを容易に行え、取付け収納にも手間がかからない。また、冷媒循環回路だけ交換することにより、リニューアル時のコストダウンも図れる。
請求項の発明では、高風速で使用しても圧力損失が増加せずかつ熱交換能力も低下しないので小型の蒸発器と凝縮器を使用でき空調機を大幅にコンパクト化できる。
【図面の簡単な説明】
【図1】本発明の一実施例を示す正面図である。
【図2】図1の側面図である。
【図3】使用状態の説明図である。
【図4】冷媒循環回路の簡略説明図である。
【図5】フィンチューブの断面図である。
【符号の説明】
1 ケーシング
2 蒸発器
3 凝縮器
4 圧縮機
5 チャンバ
6 空気清浄機構
7 外気取入口
6 空気清浄機構
11 蒸発用送風機
12 凝縮用送風機
A 給気送風路
B 排気送風路
C 冷媒循環回路
D 制御手段
E 還気送風路
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat pump type air conditioner.
[0002]
[Prior art]
Conventionally, a heat pump type room air conditioner only needs to perform air-conditioning operation and perform outside air processing with another device. Further, the return air is supplied with heat by exchanging heat with the evaporator of the indoor unit, and the refrigerant that has exchanged heat with the evaporator is exchanged with outside air blown to the condenser of the outdoor unit.
[0003]
[Problems to be solved by the invention]
Therefore, equipment cost for equipment for treating outside air is extra, and piping work for connecting the indoor unit and the outdoor unit is required. Further, since the condenser exchanges heat with the outside air, the efficiency is low, and the use of the condenser in extremely cold or extremely hot places is limited. Then, it aims at providing the heat pump type air conditioner which solves these problems.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, a heat pump air conditioner according to the present invention has a casing in which an evaporator, a condenser and a compressor constituting a refrigerant circulation circuit and the evaporator through which return air and outside air pass are provided. An air blower path, an exhaust blower path provided with the condenser through which return air and outside air pass, and a condensing blower capable of controlling a flow rate in the exhaust blower path, and the condensing blower according to a heat load. A control means for controlling the air volume is provided. Further, an evaporative blower capable of controlling the air flow is provided in the air supply air passage, and the control means performs air flow control of the condensing air blower and the evaporative air blower according to the heat load. Further, a compressor whose capacity is freely controllable is used as a control means for controlling the air volume of the condensing fan and the evaporating fan and controlling the capacity of the compressor according to the heat load. Further, a return air ventilation path is provided in the casing, and an external air intake communicating with the air supply air path and the exhaust air path is formed in the casing, and the exhaust air path, the air supply air path, and the return air ventilation path are formed. The casing was formed by adjoining the passages in three rows and connecting and connecting the air supply passage and the return air passage at one end in the column direction and connecting and connecting the exhaust air passage and the return air passage. . Further, a duct chamber communicating with the air supply air passage or with the air supply air passage and the return air air passage is provided, and the air cleaning mechanism is housed in this chamber so that it can be stored and taken out. Further, the refrigerant circulation circuit is configured to be able to be taken out and stored in the casing. Further, the fin tubes of the evaporator and the condenser were constituted by elliptic tubes.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 4 show an embodiment of a heat pump type air conditioner according to the present invention. The air conditioner includes an evaporator 2, a condenser 3 and a compressor which constitute a refrigerant circuit C in a casing 1. 4, an air supply path A provided with an evaporator 2 through which return air and external air pass, an exhaust path B with a condenser 3 through which return air and external air pass, and a return air path E. I have. The casing 1 is provided with an outside air intake 7, an air supply port 8, a return air port 9, and an exhaust port 10, and the outside air intake 7 and the air supply port 8 are connected to each other through an air supply / air supply path A, so that the outside air intake The inlet 7 and the exhaust port 10 are connected to each other through an exhaust air path B, and the return air port 9 is connected to the return air path E. In addition, the wind direction (blowing direction) is indicated by solid and dotted outline arrows.
[0006]
The exhaust air path B, the supply air path A, and the return air path E are arranged adjacent to each other in three rows, and the air supply path A and the return air path E are connected at one end in the column direction. The casing 1 is formed in a flat shape by connecting the return air blowing passage E in communication. The outside air inlet 7, a communication part between the supply air supply path A upstream of the outside air intake 7 and the return air supply path E, and a connection between the exhaust air supply path B upstream of the outside air intake 7 and the return air supply path E Each section is provided with an air volume adjustment damper.
[0007]
Further, a duct chamber 5 communicating with the supply air passage A and the return air passage E is provided, and the air cleaning mechanism 6 is housed in the chamber 5 so as to be able to be stored and taken out. The air cleaning mechanism 6 may be constituted by a photocatalyst filter for removing dust, deodorizing and sterilizing pollen and tobacco, for example, but may be constituted by other electric devices. The chamber 5, the air supply passage A, the return air passage E, and the indoor are connected to each other through a duct or the like, but the chamber 5, the air supply passage A, and the return air passage E may be directly connected to each other. . In the example shown in the figure, the chamber 5 is divided into two parts, and the air purifying mechanism 6 is provided in the divided vacant room communicating with the air supply air passage A. The air purifying mechanism 6 may be provided internally. In this case, the return air ventilation passage E and the indoor space are connected by a duct or the like.
[0008]
The refrigerant circuit C is formed by connecting the evaporator 2, the condenser 3, the compressor 4, a liquid receiver (not shown), an expansion valve, a refrigerant circulation direction switching valve, and the like with piping. Heat absorption and heat radiation can be switched freely. The condenser 3 and the evaporator 2 are provided adjacent to each other to minimize the volume occupied in the refrigerant circuit C. The fin tubes of the condenser 3 and the evaporator 2 are preferably constituted by low pressure drop elliptical tubes (see FIG. 5), but may be circular tubes.
[0009]
The refrigerant circuit C is configured to be able to be taken out and stored in the casing 1. For example, the refrigerant circulation circuit C is fixed to and integrated with a frame 13 which is detachably mounted in the casing 1, an opening is formed on one surface of the casing 1, and a frame 13 with a refrigerant circulation circuit is formed on the opening. It is constructed so that it can be taken out and stored freely. The opening is provided with a detachable or openable / closable exterior plate. It is to be noted that the refrigerant circulation circuit C may be provided so as to be freely taken out and stored in a configuration other than the above.
[0010]
An exhaust blower B is provided with a condensing blower 12 whose air volume can be controlled, and an air blower A is provided with an evaporative blower 11 whose air flow can be controlled. The blowers 11 and 12 are configured to be capable of controlling the air volume (blade rotation speed) by inverter control or the like. The compressor 4 is configured to be capable of controlling the capacity by inverter control or the like. D is a control means for controlling the air volume of the condensing fan 12 and the evaporating fan 11 and the capacity control of the compressor 4 in a stepwise or proportional manner in accordance with the fluctuation of the heat load. For example, when the cooling load or the heating load increases, the condenser air volume, the evaporator air volume, and the compressor capacity are appropriately increased, and when the cooling load or the heating load decreases, the condenser air volume, the evaporator air volume, and the compressor capacity are appropriately reduced. The control means D is composed of, for example, a sensor or a microcomputer.
[0011]
In this heat pump type air conditioner, heat is exchanged between the return air (exhaust air from the inside) taken in from the return air port 9 and the outside air taken in from the outside air inlet 7 with the refrigerant flowing through the evaporator 2 and, if necessary, the humidifier 14. Is operated to supply air from the air supply port 8, and at the same time, exchange heat between the return air taken in from the return air port 9 and the outside air taken in from the outside air inlet 7 to absorb or radiate heat, thereby exchanging heat. Exhaust from 10 to the outside. In this way, the heat exchange load of the condenser 3 can be reduced by using the return air heat, and the effect as if using the total heat exchanger can be obtained in the condenser 3. At this time, the amount of heat (cooling / heating capacity) exceeding the performance limit of the compressor 4 can be obtained by increasing the flow rate of the condenser, and the coefficient of performance (COP) is improved. In the case where the heat load is reduced and the compressor capacity is reduced, a blower having a constant air volume wastefully consumes blower power, but in the present invention, the airflow of the blower can be reduced to save energy. In addition, compared to the case where the air volume is controlled by operating / stopping a plurality of blowers, the capacity can be finely adjusted at low cost.
[0012]
It should be noted that the capacity can be freely adjusted as the control means D which performs only the air volume control of the condensing blower 12 and the evaporative air blower 11 in accordance with the heat load, or as the control means D which performs only the air volume control of the condensing blower 12. . The outside air intake 7 may be provided so as to extend over the air supply passage A and the exhaust air passage B, instead of being separately connected to the supply air passage A and the exhaust air passage B one by one. The arrangement order of the exhaust air passage B, the supply air passage A, and the return air passage E can be freely changed, and the blowers 11, 12 can be of a push-in type instead of a suction type.
[0013]
【The invention's effect】
According to the first aspect of the present invention, a single air conditioner can perform an outside air process such as a cooling / heating operation and ventilation, and piping work is not required. Since the condenser can be operated by using the return air heat, the heat exchange capacity is high and the refrigerant circulation circuit can be downsized to save energy, eliminating the need for extra external air treatment equipment such as a total heat exchanger, and It can be made compact, requires less installation space, and can reduce equipment costs and running costs. The capacity of the air conditioner can be finely adjusted, the coefficient of performance is improved and energy saving is achieved, and the compressor can be used in a wide range of regions from extremely cold to extremely hot regions without increasing the size of the compressor . By adding the capacity control of compressors, it is possible to perform a more detailed capability adjustment. The casing flat the exhaust air passage and the supply air passage and the return air blowing path in the three rows, it is possible to provide the air supply port and the return air inlet in communication with an indoor to the column direction other end portion, An air conditioner can be easily installed along a wall or the like with a small floor area.
According to the second aspect of the present invention, a high degree of outside air processing can be performed, so that it can be used in hospitals and clean rooms. The chamber can be used also as the casing of the air cleaning mechanism, so that maintenance and installation of the air cleaning mechanism is easy, and the air conditioner can be made compact.
According to the third aspect of the invention, only the refrigerant circulation circuit is taken out of the casing without removing the entire casing, so that the refrigerant recovery operation and maintenance can be easily performed, and the installation and storage are not troublesome. Further, by replacing only the refrigerant circuit, the cost can be reduced at the time of renewal.
According to the fourth aspect of the present invention, even when used at a high wind speed, the pressure loss does not increase and the heat exchange capacity does not decrease, so that a small-sized evaporator and condenser can be used, and the air conditioner can be made much more compact.
[Brief description of the drawings]
FIG. 1 is a front view showing one embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is an explanatory diagram of a use state.
FIG. 4 is a simplified explanatory diagram of a refrigerant circuit.
FIG. 5 is a sectional view of a fin tube.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 2 Evaporator 3 Condenser 4 Compressor 5 Chamber 6 Air purifying mechanism 7 Outside air inlet 6 Air purifying mechanism 11 Evaporating blower 12 Condensing blower A Supply air path B Exhaust air path C Refrigerant circulation circuit D Control means E Return air duct

Claims (4)

  1. ケーシング1内に、冷媒循環回路Cを構成する蒸発器2、凝縮器3及び容量制御自在な圧縮機4と、還気と外気が通る前記蒸発器2を設けた給気送風路Aと、還気と外気が通る前記凝縮器3を設けた排気送風路Bと、還気送風路Eと、を備え、前記排気送風路Bに風量制御自在な凝縮用送風機12を設けると共に、前記給気送風路Aに風量制御自在な蒸発用送風機11を設け、熱負荷に応じて前記凝縮用送風機12と前記蒸発用送風機11の風量制御と前記圧縮機4の容量制御を行う制御手段Dを、備え、前記ケーシング1に、前記給気送風路Aと前記排気送風路Bに連通する外気取入口7を、形成し、前記排気送風路Bと前記給気送風路Aと前記還気送風路Eを三列に隣接させると共にその列方向一端部において前記給気送風路Aと前記還気送風路Eを連通連結させかつ前記排気送風路Bと前記還気送風路Eを連通連結させて前記ケーシング1を扁平状に形成したことを特徴とするヒートポンプ式空調機。In a casing 1, an evaporator 2, a condenser 3, and a compressor 4 whose volume can be controlled , which constitutes a refrigerant circuit C, a supply air passage A provided with the evaporator 2 through which return air and outside air pass, An exhaust ventilation path B provided with the condenser 3 through which air and outside air pass, and a return air ventilation path E. The exhaust ventilation path B is provided with a condensing blower 12 capable of controlling the air flow, and An air blower 11 capable of controlling the air flow is provided in the path A, and control means D for controlling the air flow of the condensing air blower 12 and the air blower 11 and controlling the capacity of the compressor 4 in accordance with a heat load, An external air inlet 7 communicating with the air supply air passage A and the exhaust air passage B is formed in the casing 1, and the exhaust air passage B, the air supply air passage A, and the return air air passage E are connected to each other by three. Adjacent to a row, and at one end in the row direction, the air supply air passage A and the return Heat pump air conditioner which is characterized in that the formation of the casing 1 into a flat shape to the airflow path E is communicatively connected and said exhaust air passage B the return air blowing path E by communicatively connected.
  2. 給気送風路Aに連通する又は給気送風路Aと還気送風路Eに連通するダクト用チャンバ5を、設け、このチャンバ5に、空気清浄機構6を収納・取出自在に内装させた請求項1記載のヒートポンプ式空調機。 A duct chamber 5 communicating with the air supply air passage A or communicating with the air supply air passage A and the return air air passage E, and an air purification mechanism 6 is housed in the chamber 5 so as to be housed and taken out. Item 2. A heat pump air conditioner according to item 1 .
  3. 冷媒循環回路Cを、ケーシング1に対して取出・収納自在に構成した請求項1又は2記載のヒートポンプ式空調機。The heat pump type air conditioner according to claim 1 or 2, wherein the refrigerant circulation circuit (C) is configured to be able to be taken out and stored in the casing (1) .
  4. 蒸発器2と凝縮器3のフィンチューブを楕円管で構成した請求項1、2又は3記載のヒートポンプ式空調機。 4. The heat pump air conditioner according to claim 1, wherein the fin tubes of the evaporator 2 and the condenser 3 are elliptical tubes .
JP2002138147A 2002-05-14 2002-05-14 Heat pump type air conditioner Active JP3565276B2 (en)

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KR100654893B1 (en) 2004-11-15 2006-12-06 주식회사 인벤트이엔지 Control method of indoor temperature/humidity control system using air conditioner having heat/humidity exchange means
KR100741871B1 (en) 2006-12-12 2007-07-23 황도섭 One body multi type heat pump device and thereof using system
US20130277021A1 (en) * 2012-04-23 2013-10-24 Lummus Technology Inc. Cold Box Design for Core Replacement

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