JP2007192436A - Air conditioner - Google Patents

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JP2007192436A
JP2007192436A JP2006009337A JP2006009337A JP2007192436A JP 2007192436 A JP2007192436 A JP 2007192436A JP 2006009337 A JP2006009337 A JP 2006009337A JP 2006009337 A JP2006009337 A JP 2006009337A JP 2007192436 A JP2007192436 A JP 2007192436A
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heat exchanger
outdoor
indoor
air conditioner
temperature
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JP2006009337A
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Japanese (ja)
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Toshikazu Nakakura
俊和 中倉
Tomohito Nozokido
智史 莅戸
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Corona Corp
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Corona Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To reduce initial costs of an air conditioner by minimizing increase in manufacturing cost caused by increase of indoor solenoid valves and the like. <P>SOLUTION: In this air conditioner comprising a refrigerating circuit constituted by connecting a compressor 3, an outdoor heat exchanger 4 functioned as a condenser, an outdoor pressure reducing mechanism 5, and an indoor heat exchanger 6, and constituted by successively connecting a first exchanger 7 of the indoor heat exchanger 6, an indoor pressure reducing mechanism 9 and a second heat exchanger 8 in series, the outdoor pressure reducing mechanism is composed of a capillary tube 5, and control portions 24, 26 are disposed to reduce air distribution by an outdoor fan 16 in comparison with an ordinary operation, during a dehumidifying operation where the refrigerant is condensed by the outdoor heat exchanger 4 and the first heat exchanger 7, and the refrigerant is evaporated by the second heat exchanger 8. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、除湿運転を行うことのできる空気調和機に関するものである。   The present invention relates to an air conditioner capable of performing a dehumidifying operation.

従来より、室内の冷暖房に加えて、除湿運転を行う空気調和機が知られている。この種の空気調和機は、室内空気を冷却して空気中の水分を結露させることよって室内空気を減湿する。このため、室内空気の湿度だけでなく温度も低下してしまい、快適性を損なうという問題があった。   Conventionally, an air conditioner that performs a dehumidifying operation in addition to indoor air conditioning is known. This type of air conditioner dehumidifies indoor air by cooling the indoor air to condense moisture in the air. For this reason, not only the humidity of the indoor air but also the temperature is lowered, and there is a problem that the comfort is impaired.

この問題に対処すべく、室内空気の再熱を行う空気調和機が提案されている。この空気調和機では、室内熱交換器が2つの熱交換器に分割されると共に、両熱交換器の間に室内膨張弁が設けられる。除湿運転時において、循環する冷媒は、室外熱交換器及び一方の熱交換器で凝縮し、室内膨張弁で減圧された後に他方の熱交換器へ送られて蒸発する。そして、一方の熱交換器では室内空気が加熱され、他方の熱交換器では室内空気が冷却されて減湿される。このように、室内熱交換器において室内空気の加熱と冷却減湿の両方を行い、室内温度の低下を回避している。(例えば、特許文献1参照)
特開2000−205696号公報
In order to cope with this problem, an air conditioner that reheats indoor air has been proposed. In this air conditioner, the indoor heat exchanger is divided into two heat exchangers, and an indoor expansion valve is provided between the two heat exchangers. During the dehumidifying operation, the circulating refrigerant is condensed in the outdoor heat exchanger and one of the heat exchangers, decompressed by the indoor expansion valve, and then sent to the other heat exchanger to be evaporated. The indoor air is heated in one heat exchanger, and the indoor air is cooled and dehumidified in the other heat exchanger. In this way, in the indoor heat exchanger, both indoor air heating and cooling / humidification are performed to avoid a decrease in indoor temperature. (For example, see Patent Document 1)
JP 2000-205696 A

しかしながら、上記従来の空気調和機では、従来の空気調和機に比較して室内膨張弁が新たに必要であることと、室内熱交換器が分割されたことによる冷媒配管が新たに必要になること等で、製造コストが上昇する問題が有った。   However, the conventional air conditioner requires a new indoor expansion valve as compared with the conventional air conditioner, and requires a new refrigerant pipe due to the division of the indoor heat exchanger. As a result, there was a problem that the manufacturing cost increased.

この発明はこの点に着目し、上記欠点を解決する為、特にその構成を、圧縮機と、室外熱交換器と、室外減圧機構と、室内熱交換器とを連通して冷凍回路を形成し、前記室内熱交換器の第1熱交換器と室内減圧機構と第2熱交換器とを順に直列接続して構成した空気調和機に於いて、前記室外減圧機構をキャピラリーチューブにて形成し、前記室外熱交換器及び第1熱交換器で冷媒が凝縮して第2熱交換器で冷媒が蒸発する除湿運転中には、室外ファンの送風量を通常運転時よりも少なくする制御部を備えたものである。   The present invention pays attention to this point, and in order to solve the above-described drawbacks, in particular, the configuration is such that a compressor, an outdoor heat exchanger, an outdoor decompression mechanism, and an indoor heat exchanger are connected to form a refrigeration circuit. In the air conditioner configured by sequentially connecting the first heat exchanger, the indoor pressure reducing mechanism, and the second heat exchanger of the indoor heat exchanger in series, the outdoor pressure reducing mechanism is formed by a capillary tube, A control unit is provided that reduces the amount of air blown by the outdoor fan during the dehumidifying operation in which the refrigerant condenses in the outdoor heat exchanger and the first heat exchanger and the refrigerant evaporates in the second heat exchanger. It is a thing.

また、室外熱交換器の温度を検知する室外熱交センサを設け、除湿運転中には前記室外熱交センサの値に応じて室外ファンの送風量を変化させるようにしたものである。   In addition, an outdoor heat exchange sensor for detecting the temperature of the outdoor heat exchanger is provided, and during the dehumidifying operation, the air flow rate of the outdoor fan is changed according to the value of the outdoor heat exchange sensor.

また、前記室外ファンは室外モータによって駆動され、この室外モータはACモータで構成したものである。   The outdoor fan is driven by an outdoor motor, and the outdoor motor is an AC motor.

この発明によれば、室外機の減圧機構に安価なキャピラリーチューブを採用してコストダウンを行っても、制御部が室外ファンの送風量を少なく制御することによって、除湿運転時に第1熱交換器を充分に高温に保つことができ、吹出温度が吸込み温度とほぼ同等となる再熱除湿運転を確実に行うことで、快適性を高めることができる。   According to the present invention, even if an inexpensive capillary tube is used for the decompression mechanism of the outdoor unit and the cost is reduced, the control unit controls the amount of air blown from the outdoor fan so that the first heat exchanger is operated during the dehumidifying operation. Can be maintained at a sufficiently high temperature, and comfort can be enhanced by reliably performing the reheat dehumidifying operation in which the blowing temperature is substantially equal to the suction temperature.

また、室外モータを安価なACモータを採用することで、更なるコストダウンができる。   Further, by using an inexpensive AC motor for the outdoor motor, the cost can be further reduced.

次にこの発明の一実施形態を図面に基づき説明する。
1は屋外に設置される空気調和機の室外機で、室内に設置される室内機2と冷媒配管で接続される。この空気調和機は、インバータ制御により回転数可変の圧縮機3と、室外熱交換器4と、室外減圧機構(キャピラリーチューブ)5と、室内熱交換器6とが順次接続され冷凍回路を形成するものである。また、室内熱交換器6は、室外減圧機構5側の第1熱交換器7と、圧縮機3側の第2熱交換器8とに分割形成されている。そして、この第1熱交換器7と第2熱交換器8との間に、室内減圧機構(室内膨張弁)9が介設されている。なお、室外減圧機構5として安価なキャピラリーチューブを使用し、室外減圧機構9としてはこの場合電動膨張弁を使用している。
Next, an embodiment of the present invention will be described with reference to the drawings.
1 is an outdoor unit of an air conditioner installed outdoors, and is connected to an indoor unit 2 installed indoors by a refrigerant pipe. In this air conditioner, a compressor 3 having a variable number of revolutions by inverter control, an outdoor heat exchanger 4, an outdoor pressure reducing mechanism (capillary tube) 5, and an indoor heat exchanger 6 are sequentially connected to form a refrigeration circuit. Is. The indoor heat exchanger 6 is divided into a first heat exchanger 7 on the outdoor decompression mechanism 5 side and a second heat exchanger 8 on the compressor 3 side. An indoor decompression mechanism (indoor expansion valve) 9 is interposed between the first heat exchanger 7 and the second heat exchanger 8. In addition, an inexpensive capillary tube is used as the outdoor pressure reducing mechanism 5, and an electric expansion valve is used as the outdoor pressure reducing mechanism 9 in this case.

具体的には、圧縮機3の吐出配管10が室外熱交換器4に接続され、室外熱交換器4とキャピラリーチューブ5とが第1配管11にて接続され、また、キャピラリーチューブ5と室内熱交換器6の第1熱交換器7とは液側連絡配管12を介して接続され、室内熱交換器6の第1熱交換器7と第2熱交換器8とは、室内膨張弁9が介設された接続配管13を介して接続され、第2熱交換器8と、圧縮機3の吸込配管14とがガス側連絡配管15を介して接続されている。   Specifically, the discharge pipe 10 of the compressor 3 is connected to the outdoor heat exchanger 4, the outdoor heat exchanger 4 and the capillary tube 5 are connected by the first pipe 11, and the capillary tube 5 and the indoor heat are connected. The first heat exchanger 7 of the exchanger 6 is connected to the first heat exchanger 7 and the second heat exchanger 8 of the indoor heat exchanger 6 by a liquid side connecting pipe 12. The second heat exchanger 8 and the suction pipe 14 of the compressor 3 are connected via a gas side communication pipe 15.

また、室外熱交換器4には、この室外熱交換器4の能力を調整するための室外ファン(プロペラファン)16が付設され、この室外ファン16は室外モータ17にて駆動されるもので、交流電源を使用する安価なACモータを使用することによってコストダウンを行うものであり、供給する交流電源のパルスを操作するサイクル制御によって室外モータ17の回転数をコントロールするものである。   The outdoor heat exchanger 4 is provided with an outdoor fan (propeller fan) 16 for adjusting the capacity of the outdoor heat exchanger 4, and the outdoor fan 16 is driven by an outdoor motor 17. The cost is reduced by using an inexpensive AC motor that uses an AC power supply, and the rotational speed of the outdoor motor 17 is controlled by cycle control that operates pulses of the supplied AC power supply.

また、室内熱交換器6には、この室内熱交換器6の能力を調整するための室内ファン(クロスフローファン)18が付設されている。さらに、この空気調和機は、圧縮機3の吐出温度(この場合、吐出管10の温度)を検出する吐出温度検出手段19と、外気温度を検出する外気温度検出手段20と、第2熱交換器8の温度を検出する蒸発器温度検出手段21とを備える。この場合、吐出温度検出手段19及び外気温度検出手段20は温度センサ19a、20aにて構成することができ、蒸発器温度検出手段21は、第2熱交換器8の入口温度を検出する第1温度センサ21aと、第2熱交換器8の中間温度を検出する第2温度センサ21bと、第2熱交換器8の出口温度を検出する第3温度センサ21cとから構成されている。22は室外熱交温度検出手段で、前記室外熱交換器4の温度を室外熱交温度センサ23にて検出する。   The indoor heat exchanger 6 is provided with an indoor fan (cross flow fan) 18 for adjusting the capacity of the indoor heat exchanger 6. Furthermore, this air conditioner includes a discharge temperature detection means 19 that detects the discharge temperature of the compressor 3 (in this case, the temperature of the discharge pipe 10), an outside air temperature detection means 20 that detects the outside air temperature, and a second heat exchange. Evaporator temperature detecting means 21 for detecting the temperature of the vessel 8. In this case, the discharge temperature detecting means 19 and the outside air temperature detecting means 20 can be constituted by the temperature sensors 19a and 20a, and the evaporator temperature detecting means 21 is the first detecting the inlet temperature of the second heat exchanger 8. The temperature sensor 21a includes a second temperature sensor 21b that detects an intermediate temperature of the second heat exchanger 8, and a third temperature sensor 21c that detects an outlet temperature of the second heat exchanger 8. Reference numeral 22 denotes an outdoor heat exchanger temperature detecting means, which detects the temperature of the outdoor heat exchanger 4 by an outdoor heat exchanger temperature sensor 23.

24は室内制御部で、内部に備えたマイコンの機能として能力制御手段25を備えている。能力制御手段25は、室内ファン18の風量を増減させる室内ファン制御、圧縮機3の能力を増減させる圧縮機能力制御等を行うものである。   An indoor control unit 24 includes a capability control means 25 as a function of a microcomputer provided therein. The capacity control means 25 performs indoor fan control for increasing / decreasing the air volume of the indoor fan 18, compression function force control for increasing / decreasing the capacity of the compressor 3, and the like.

26は室外制御部で、内部に備えたマイコンの機能として吐出温度制御手段27と凝縮温度制御手段28を備えている。吐出温度制御手段27は、上記吐出温度検出手段19にて検出された吐出温度を、予め設定された目標吐出温度に近づけるように制御するものである。また、凝縮温度制御手段28は、除湿運転時に室外熱交温度検出手段22にて検出された凝縮温度を、予め設定された凝縮温度に近づけるように室外ファン16の回転を制御するものである。   An outdoor control unit 26 includes a discharge temperature control means 27 and a condensation temperature control means 28 as functions of a microcomputer provided therein. The discharge temperature control means 27 controls the discharge temperature detected by the discharge temperature detection means 19 so as to approach a preset target discharge temperature. The condensing temperature control means 28 controls the rotation of the outdoor fan 16 so that the condensing temperature detected by the outdoor heat exchanger temperature detecting means 22 during the dehumidifying operation approaches the preset condensing temperature.

このように構成された空気調和機において、通常の冷房運転を行う場合、室内膨張弁9を全開状態として、圧縮機3を駆動させる。これにより、圧縮機3から吐出された冷媒は、室外熱交換器4を通過した後、キャピラリーチューブ5で減圧膨張して、第1熱交換器7及び第2熱交換器8を順次通過し、圧縮機3に返流される。この際、室外熱交換器4が凝縮器として機能すると共に、第1熱交換器7及び第2熱交換器8が蒸発器として機能し、室内から吸収した熱量を室外へ放出して室内冷房が行われる。   In the air conditioner configured as described above, when the normal cooling operation is performed, the compressor 3 is driven with the indoor expansion valve 9 fully opened. Thereby, after the refrigerant discharged from the compressor 3 passes through the outdoor heat exchanger 4, it is decompressed and expanded in the capillary tube 5, and sequentially passes through the first heat exchanger 7 and the second heat exchanger 8, Returned to the compressor 3. At this time, the outdoor heat exchanger 4 functions as a condenser, and the first heat exchanger 7 and the second heat exchanger 8 function as an evaporator, and the amount of heat absorbed from the room is released to the outside to cool the room. Done.

また、除湿運転は、室内膨張弁9を所定の開度に絞り、圧縮機3を駆動させる。そして室外ファン16の回転数を、通常運転時に約600rpmであるものを、約120rpm〜170rpmに回転を下げることで、キャピラリーチューブ5によって減圧された冷媒の温度を高めに保って第1熱交換器7へ送るものである。   In the dehumidifying operation, the indoor expansion valve 9 is throttled to a predetermined opening, and the compressor 3 is driven. Then, by reducing the rotation speed of the outdoor fan 16 from about 600 rpm during normal operation to about 120 rpm to 170 rpm, the temperature of the refrigerant depressurized by the capillary tube 5 is kept high, and the first heat exchanger 7 to send.

また、除湿運転時の室外熱交温度センサ23の検出温度が高めの場合には、室外ファン16の回転は約170rpmで運転するが、室内熱交温度センサ23の検出温度が低い場合には、更に回転数を低下させ約120rpmの超低速にすることで室外熱交換器4を高温にし、第1熱交換器7を高温に保つことができるものである。   Further, when the detected temperature of the outdoor heat exchange temperature sensor 23 during the dehumidifying operation is high, the rotation of the outdoor fan 16 is operated at about 170 rpm, but when the detected temperature of the indoor heat exchange temperature sensor 23 is low, Further, the outdoor heat exchanger 4 can be heated to a high temperature and the first heat exchanger 7 can be kept at a high temperature by lowering the rotational speed to an ultra-low speed of about 120 rpm.

これにより、圧縮機3から吐出された高圧の冷媒は、室外熱交換器4であまり放熱を行わない状態で通過し、次のキャピラリーチューブ5で減圧されても第1熱交換器7では冷媒温度を高く設定している。そして、室内膨張弁9で減圧膨張して、第2熱交換器8を低温にして通過し、圧縮機3に返流される。このため、第2熱交換器8を通過する室内空気は冷却されて除湿され、同時に、第1熱交換器7を通過する室内空気は加熱される。そして、これらが混合されてなる除湿された空調空気が室内に吹き出されることになる。このため、吹出温度が吸込温度とほぼ同等となる再熱除湿運転を行うことができる。   Thus, the high-pressure refrigerant discharged from the compressor 3 passes through the outdoor heat exchanger 4 without radiating much heat, and even if the pressure is reduced by the next capillary tube 5, the refrigerant temperature in the first heat exchanger 7. Is set high. Then, it is decompressed and expanded by the indoor expansion valve 9, passes through the second heat exchanger 8 at a low temperature, and is returned to the compressor 3. For this reason, the indoor air that passes through the second heat exchanger 8 is cooled and dehumidified, and at the same time, the indoor air that passes through the first heat exchanger 7 is heated. Then, the dehumidified conditioned air obtained by mixing them is blown out into the room. For this reason, the reheat dehumidification operation in which the blowing temperature becomes substantially equal to the suction temperature can be performed.

この発明一実施形態の概略図。1 is a schematic view of an embodiment of the present invention.

符号の説明Explanation of symbols

4 室外熱交換器
5 室外減圧機構(キャピラリーチューブ)
7 第1熱交換器
8 第2熱交換器
9 室内減圧機構(室内膨張弁)
16 室外ファン
17 室外モータ
4 Outdoor heat exchanger 5 Outdoor decompression mechanism (capillary tube)
7 First heat exchanger 8 Second heat exchanger 9 Indoor decompression mechanism (indoor expansion valve)
16 Outdoor fan 17 Outdoor motor

Claims (3)

圧縮機と、室外熱交換器と、室外減圧機構と、室内熱交換器とを連通して冷凍回路を形成し、前記室内熱交換器の第1熱交換器と室内減圧機構と第2熱交換器とを順に直列接続して構成した空気調和機に於いて、前記室外減圧機構をキャピラリーチューブにて形成し、前記室外熱交換器及び第1熱交換器で冷媒が凝縮して第2熱交換器で冷媒が蒸発する除湿運転中には、室外ファンの送風量を通常運転時よりも少なくする制御部を備えたことを特徴とする空気調和機。   A compressor, an outdoor heat exchanger, an outdoor decompression mechanism, and an indoor heat exchanger are connected to form a refrigeration circuit, and the first heat exchanger, the indoor decompression mechanism, and the second heat exchange of the indoor heat exchanger are formed. In the air conditioner constructed by sequentially connecting the chambers in series, the outdoor pressure reducing mechanism is formed by a capillary tube, and the refrigerant is condensed in the outdoor heat exchanger and the first heat exchanger to perform the second heat exchange. An air conditioner comprising a control unit that reduces the amount of air blown by the outdoor fan during the dehumidifying operation in which the refrigerant evaporates in the chamber. 室外熱交換器の温度を検知する室外熱交センサを設け、除湿運転中には前記室外熱交センサの値に応じて室外ファンの送風量を変化させることを特徴とする請求項1記載の空気調和機。   The air according to claim 1, wherein an outdoor heat exchange sensor for detecting the temperature of the outdoor heat exchanger is provided, and an air flow rate of the outdoor fan is changed according to a value of the outdoor heat exchange sensor during the dehumidifying operation. Harmony machine. 前記室外ファンは室外モータによって駆動され、この室外モータはACモータで構成したことを特徴とする請求項1又は請求項2記載の空気調和機。   The air conditioner according to claim 1 or 2, wherein the outdoor fan is driven by an outdoor motor, and the outdoor motor is an AC motor.
JP2006009337A 2006-01-18 2006-01-18 Air conditioner Granted JP2007192436A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105485836A (en) * 2015-12-10 2016-04-13 广东志高空调有限公司 Method for improving heating capacity of heat pump type air conditioner and heat pump type air conditioner
CN107192013A (en) * 2017-05-09 2017-09-22 珠海格力电器股份有限公司 Indoor units and the air conditioner with it

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105485836A (en) * 2015-12-10 2016-04-13 广东志高空调有限公司 Method for improving heating capacity of heat pump type air conditioner and heat pump type air conditioner
CN107192013A (en) * 2017-05-09 2017-09-22 珠海格力电器股份有限公司 Indoor units and the air conditioner with it
CN107192013B (en) * 2017-05-09 2019-08-13 珠海格力电器股份有限公司 Indoor units and air conditioner with it

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