JPH0634221A - Air conditioning system - Google Patents

Air conditioning system

Info

Publication number
JPH0634221A
JPH0634221A JP18919692A JP18919692A JPH0634221A JP H0634221 A JPH0634221 A JP H0634221A JP 18919692 A JP18919692 A JP 18919692A JP 18919692 A JP18919692 A JP 18919692A JP H0634221 A JPH0634221 A JP H0634221A
Authority
JP
Japan
Prior art keywords
refrigerant
temperature
heating
heating operation
heat exchanger
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
Application number
JP18919692A
Other languages
Japanese (ja)
Other versions
JP3334169B2 (en
Inventor
Hisashi Takechi
久史 武市
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP18919692A priority Critical patent/JP3334169B2/en
Publication of JPH0634221A publication Critical patent/JPH0634221A/en
Application granted granted Critical
Publication of JP3334169B2 publication Critical patent/JP3334169B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To make it possible to lessen hunting of a heating temperature near a set temperature by providing a new heating operation pattern in which injection is executed in the process of an ordinary heating operation not being accompanied by heating of a refrigerant by enabling execution of the injection not being accompanied by the heating of the refrigerant, in air conditioning system which can conduct the heating operation. CONSTITUTION:A refrigerant heater 7 is interposed between a use-side heat exchanger 5 and a refrigerant storing part 14, and an injection bypass passage 21 is disposed from a gas storing part of the refrigerant storing part 14 to the intake side of a compressor 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、空気調和装置に関
し、特に暖房運転中の暖房温度のハンチングを抑制し、
過負荷を防止する対策に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and particularly to suppressing hunting of the heating temperature during heating operation,
Regarding measures to prevent overload.

【0002】[0002]

【従来の技術】従来の空気調和装置の一例として、例え
ば特開昭62−276370号公報で知られているよう
に、圧縮機、利用側熱交換器、膨張機構及び熱源側熱交
換器が冷媒配管により順に接続されて暖房運転可能な冷
媒回路を備え、一端が上記利用側熱交換器と膨張機構と
の間の冷媒配管に、また他端が上記圧縮機の中間圧ポー
トにそれぞれ接続されたインジェクションバイパス路が
配設され、かつ該バイパス路の途中に冷媒の加熱が可能
なヒータが設けられたものがある。
2. Description of the Related Art As an example of a conventional air conditioner, for example, a compressor, a use side heat exchanger, an expansion mechanism and a heat source side heat exchanger are refrigerants as known from Japanese Patent Laid-Open No. 62-276370. A refrigerant circuit capable of performing heating operation by being sequentially connected by piping was provided, and one end was connected to the refrigerant pipe between the utilization side heat exchanger and the expansion mechanism, and the other end was connected to the intermediate pressure port of the compressor. There is a type in which an injection bypass passage is provided and a heater capable of heating a refrigerant is provided in the middle of the bypass passage.

【0003】この従来例では、インジェクションバイパ
ス路に流入した冷媒をヒータで加熱して高温ガス冷媒と
し、このガス冷媒を圧縮機の中間圧ポートにインジェク
ションすることによって圧縮機への入力を大きくし、暖
房能力を高めることができるように構成されている。
In this conventional example, the refrigerant that has flowed into the injection bypass passage is heated by the heater to be a high temperature gas refrigerant, and this gas refrigerant is injected into the intermediate pressure port of the compressor to increase the input to the compressor. It is configured to increase the heating capacity.

【0004】これにより、通常の暖房運転と、該暖房運
転中に冷媒加熱を行う暖房能力の高い急速暖房運転との
2つのパターンで暖房運転が行えるので、例えば暖房運
転の開始時や室内温度が急激に低下した場合等には、ヒ
ータをオンにして急速暖房運転を、また室内温度が設定
温度付近にまで上昇した場合等には、ヒータをオフにし
て通常の暖房運転をそれぞれ行うようになされている。
Thus, the heating operation can be performed in two patterns, that is, the normal heating operation and the rapid heating operation having a high heating capacity for heating the refrigerant during the heating operation. When the temperature drops sharply, the heater is turned on to perform quick heating operation, and when the room temperature rises to around the set temperature, the heater is turned off to perform normal heating operation. ing.

【0005】[0005]

【発明が解決しようとする課題】ところが、上記従来例
では、通常暖房運転と急速暖房運転との2つの暖房パタ
ーンしかなく、両者の暖房能力差が大きいために、設定
温度の上下付近で室内温度がハンチングし易く、安定し
た暖房能力を引出すのが困難であるという問題がある。
However, in the above-mentioned conventional example, there are only two heating patterns, that is, the normal heating operation and the rapid heating operation, and the heating capacity difference between them is large. However, there is a problem that it is easy to hunt and it is difficult to draw out stable heating capacity.

【0006】これに対しては、通常暖房運転中にヒータ
をオフにした状態でインジェクションのみを行わせる暖
房運転、つまり通常暖房と急速暖房との間のいわば中間
暖房運転を行うようにすれば、この3つの暖房パターン
を組合わせることによって、ハンチングの小さい安定し
た暖房運転を行うことが可能となる。
On the other hand, if the heating operation in which only the injection is performed with the heater turned off during the normal heating operation, that is, the so-called intermediate heating operation between normal heating and rapid heating is performed, By combining these three heating patterns, it is possible to perform stable heating operation with less hunting.

【0007】しかしながら、上記従来例では、ヒータを
オフにすると、冷媒配管内の液冷媒が加熱されずに液冷
媒のままでインジェクションバイパス路を通して圧縮機
に流入することになり、これを避けるには該バイパス路
を閉鎖しなければならず、従って、ヒータがオフの状態
ではインジェクションを行うことができないという構造
上の難点がある。
However, in the above-mentioned conventional example, when the heater is turned off, the liquid refrigerant in the refrigerant pipe is not heated but flows into the compressor through the injection bypass passage as the liquid refrigerant as it is. There is a structural difficulty in that the bypass path must be closed and therefore injection cannot be performed when the heater is off.

【0008】この発明は斯かる諸点に鑑みてなされたも
ので、その目的は、冷媒加熱を行わない状態でもインジ
ェクションを行うことができるようにし、もって設定温
度付近における暖房温度のハンチングを小さくできるよ
うにすることにある。
The present invention has been made in view of the above points, and an object thereof is to make it possible to perform injection even in a state in which the refrigerant is not heated, thereby reducing hunting of the heating temperature near the set temperature. Is to

【0009】[0009]

【課題を解決するための手段】上記の目的を達成するた
めに、請求項1の発明では、利用側熱交換器と膨張機構
との間の冷媒配管に冷媒貯溜部を介設し、その上で、冷
媒加熱器を、インジェクションバイパス路にではなく、
利用側熱交換器と上記冷媒貯溜部との間の冷媒配管に介
設した。
In order to achieve the above-mentioned object, in the invention of claim 1, a refrigerant reservoir is provided in the refrigerant pipe between the utilization side heat exchanger and the expansion mechanism, and above that. So, instead of using the refrigerant heater in the injection bypass,
It was provided in the refrigerant pipe between the utilization side heat exchanger and the refrigerant reservoir.

【0010】具体的には、この発明では、図1に示すよ
うに圧縮機(1)と、利用側熱交換器(5)と、膨張機
構(18)と、熱源側熱交換器(3)とが冷媒配管
(8)により順に接続されて暖房運転可能な冷媒回路
(9)を備えた空気調和装置が前提である。
Specifically, in the present invention, as shown in FIG. 1, a compressor (1), a utilization side heat exchanger (5), an expansion mechanism (18) and a heat source side heat exchanger (3). It is premised on an air conditioner provided with a refrigerant circuit (9) capable of heating operation by sequentially connecting and with refrigerant pipe (8).

【0011】そして、上記利用側熱交換器(5)と膨張
機構(18)との間の冷媒配管(8)に、冷媒を貯溜す
る冷媒貯溜部(14)を介設する。一端が上記冷媒貯溜
部(14)のガス貯溜部に開口する一方、他端が上記圧
縮機(1)の吸込側に接続され、該圧縮機(1)に冷媒
ガスのインジェクションが可能なインジェクションバイ
パス路(21)と、該バイパス路(21)の開閉作動を
行う開閉手段(23)とを配設する。上記利用側熱交換
器(5)と冷媒貯溜部(14)との間の冷媒配管(8)
及び該貯溜部(14)を含む位置の適所に、冷媒の加熱
が可能な冷媒加熱器(7)と、該加熱器(7)による加
熱度の調整作動を行う調整手段(10)とを配設する。
尚、上記冷媒加熱器(7)は、利用側熱交換器(5)と
冷媒貯溜部(14)との間の冷媒配管(8)に介設して
もよいし、冷媒貯溜部(14)に付設してもよい。
A refrigerant reservoir (14) for accumulating the refrigerant is provided in the refrigerant pipe (8) between the utilization side heat exchanger (5) and the expansion mechanism (18). An injection bypass capable of injecting a refrigerant gas into the compressor (1), one end of which opens to the gas storage portion of the refrigerant storage portion (14), and the other end of which is connected to the suction side of the compressor (1). A path (21) and an opening / closing means (23) for opening / closing the bypass path (21) are provided. Refrigerant piping (8) between the utilization side heat exchanger (5) and the refrigerant reservoir (14)
Also, a refrigerant heater (7) capable of heating the refrigerant and an adjusting means (10) for adjusting the degree of heating by the heater (7) are arranged at appropriate positions including the reservoir (14). Set up.
The refrigerant heater (7) may be provided in the refrigerant pipe (8) between the utilization side heat exchanger (5) and the refrigerant reservoir (14), or the refrigerant reservoir (14). You may attach to.

【0012】また、請求項2の発明では、上記請求項1
の発明において、3つの暖房パターンによる暖房運転を
制御するために、利用側熱交換器(5)における室内温
度(Tr)を検出する室内温度検出手段(15)と、目
標室内温度を設定する温度設定手段(16)と、上記室
内温度検出手段(15)及び温度設定手段(16)の各
出力信号を受け、室内温度検出手段(15)で検出され
た室内温度(Tr)を温度設定手段(16)による設定
温度(T2)と比較して、開閉手段(23)の開閉作動
及び調整手段(10)の調整作動をそれぞれ制御する制
御手段(C)とを備えた構成とする。
According to the invention of claim 2, the above-mentioned claim 1 is adopted.
In the invention of claim 5, in order to control the heating operation by the three heating patterns, an indoor temperature detecting means (15) for detecting an indoor temperature (Tr) in the utilization side heat exchanger (5) and a temperature for setting a target indoor temperature. Receiving the output signals of the setting means (16), the room temperature detecting means (15) and the temperature setting means (16), the room temperature (Tr) detected by the room temperature detecting means (15) is set to the temperature setting means ( The control means (C) controls the opening / closing operation of the opening / closing means (23) and the adjusting operation of the adjusting means (10) in comparison with the set temperature (T2) by 16).

【0013】さらに、請求項3の発明では、上記請求項
2の発明において、冷媒回路(9)に過負荷が生じて暖
房能力が大きく変化するのを防止するために、冷媒回路
(9)での負荷(Tc)を検出する負荷検出手段(1
7)を備える。そして、制御手段(C)を、上記負荷検
出手段(17)の出力信号を受け、冷媒回路(9)での
開閉手段(23)の開閉作動及び調整手段(10)の調
整作動をそれぞれ制御するように構成する。
Further, in the invention of claim 3, in the invention of claim 2, in order to prevent the heating capacity from being greatly changed due to an overload in the refrigerant circuit (9), the refrigerant circuit (9) is used. Load detecting means (1) for detecting the load (Tc) of
7) is provided. The control means (C) receives the output signal of the load detection means (17) and controls the opening / closing operation of the opening / closing means (23) and the adjusting operation of the adjusting means (10) in the refrigerant circuit (9). To configure.

【0014】[0014]

【作用】請求項1の発明では、冷媒貯溜部(14)に貯
溜された冷媒の一部は気化してガス冷媒となる。そし
て、この冷媒貯溜部(14)のガス貯溜部にインジェク
ションバイパス路(21)の一端が開口され、また該バ
イパス路(21)の他端は圧縮機(1)の吸込側に接続
されていることにより、該バイパス路(21)途中での
冷媒加熱がなされなくても、上記ガス冷媒のみが圧縮機
(1)にインジェクションされ、液冷媒が圧縮機(1)
に流入することは回避される。従って、冷媒の加熱を伴
うことなくインジェクションを行うことができ、このイ
ンジェクションにより圧縮機(1)への入力が増加し、
暖房能力が高まる。一方、冷媒加熱器(7)は利用側熱
交換器(5)と上記冷媒貯溜部(14)との間の冷媒配
管(8)に介設されるか、または該冷媒貯溜部(14)
に付設されて存するので、この冷媒加熱器(7)により
冷媒回路(9)を流通する冷媒は加熱され、該加熱され
た冷媒により熱源側熱交換器(3)への入力が増加し、
暖房能力が高まる。
In the first aspect of the invention, a part of the refrigerant stored in the refrigerant storage section (14) is vaporized to become a gas refrigerant. Then, one end of the injection bypass passage (21) is opened in the gas storage portion of the refrigerant storage portion (14), and the other end of the bypass passage (21) is connected to the suction side of the compressor (1). Thus, even if the refrigerant is not heated in the middle of the bypass passage (21), only the gas refrigerant is injected into the compressor (1), and the liquid refrigerant is compressed into the compressor (1).
It is avoided to flow into. Therefore, the injection can be performed without heating the refrigerant, and the injection increases the input to the compressor (1),
The heating capacity is increased. On the other hand, the refrigerant heater (7) is provided in the refrigerant pipe (8) between the utilization side heat exchanger (5) and the refrigerant reservoir (14), or the refrigerant reservoir (14).
The refrigerant flowing in the refrigerant circuit (9) is heated by the refrigerant heater (7), and the input to the heat source side heat exchanger (3) is increased by the heated refrigerant.
The heating capacity is increased.

【0015】これにより、インジェクション及び冷媒加
熱を行わない通常の暖房運転と、該通常暖房運転中にイ
ンジェクション及び冷媒加熱の両方を行う急速暖房運転
との2つの暖房パターンの中間に、冷媒加熱は行わず、
通常暖房運転中にインジェクションのみを行うパターン
での暖房運転が可能となり、3つの暖房パターンによる
暖房運転が行われる。
Thus, the refrigerant heating is performed in the middle of the two heating patterns of the normal heating operation in which neither injection nor refrigerant heating is performed and the rapid heating operation in which both injection and refrigerant heating are performed during the normal heating operation. No
The heating operation can be performed in a pattern in which only the injection is performed during the normal heating operation, and the heating operation is performed in three heating patterns.

【0016】また、請求項2の発明では、制御手段
(C)に室内温度検出手段(15)及び温度設定手段
(16)の各出力信号が入力され、この制御手段(C)
で室内温度(Tr)が設定温度(T2)と比較される。
これに基づいて開閉手段(23)によるインジェクショ
ンバイパス路(21)の開閉作動が制御され、これによ
り圧縮機(1)へのインジェクションが制御される。ま
た、上記制御手段(C)により調整手段(10)の調整
作動が制御されて冷媒加熱器(7)による加熱度が制御
され、これにより冷媒の加熱が制御される。従って、例
えば、両者の温度差が大きい場合には通常の暖房運転中
にインジェクションと冷媒過熱とを行う急速暖房運転
が、また小さい場合には通常の暖房運転が、さらにその
中間の場合には中間暖房運転がそれぞれ行われる。
Further, in the invention of claim 2, each output signal of the room temperature detecting means (15) and the temperature setting means (16) is inputted to the control means (C), and the control means (C).
At, the room temperature (Tr) is compared with the set temperature (T2).
Based on this, the opening / closing operation of the injection bypass passage (21) by the opening / closing means (23) is controlled, and thereby the injection into the compressor (1) is controlled. Further, the control means (C) controls the adjusting operation of the adjusting means (10) to control the degree of heating by the refrigerant heater (7), thereby controlling the heating of the refrigerant. Therefore, for example, when the temperature difference between the two is large, the rapid heating operation that performs injection and refrigerant overheating during the normal heating operation is performed, and when the temperature difference is small, the normal heating operation is performed. Each heating operation is performed.

【0017】さらに、請求項3の発明では、暖房能力が
上がり過ぎた場合等に冷媒回路(9)に生じた負荷(T
c)は負荷検出手段(17)により検出され、この負荷
検出手段(17)から出力された負荷信号を受けた制御
手段(C)により開閉手段(23)及び調整手段(1
0)が制御されて、インジェクションバイパス路(2
1)によるインジェクション及び冷媒加熱器(7)によ
る冷媒加熱が制御される。従って、例えば、急速暖房運
転中に負荷(Tc)が大きくなった場合には中間暖房運
転ないしは通常暖房運転に、また中間暖房運転中に負荷
が大きくなった場合には通常暖房運転にそれぞれ切換え
られることにより、負荷(Tc)の軽減が図られる。こ
れにより、冷媒回路(9)に過負荷の生じるのが防止さ
れ、例えば高圧保護装置が作動して暖房運転が自動停止
する等のように暖房能力に大きな変化が生じることが回
避される。
Further, in the invention of claim 3, the load (T) generated in the refrigerant circuit (9) when the heating capacity is excessively increased, etc.
c) is detected by the load detecting means (17), and the opening / closing means (23) and the adjusting means (1) are controlled by the control means (C) which receives the load signal output from the load detecting means (17).
0) is controlled and the injection bypass passage (2
The injection by 1) and the heating of the refrigerant by the refrigerant heater (7) are controlled. Therefore, for example, when the load (Tc) becomes large during the rapid heating operation, it is switched to the intermediate heating operation or normal heating operation, and when the load becomes large during the intermediate heating operation, it is switched to the normal heating operation. As a result, the load (Tc) can be reduced. As a result, the refrigerant circuit (9) is prevented from being overloaded, and a large change in the heating capacity is avoided, for example, when the high pressure protection device is activated and the heating operation is automatically stopped.

【0018】[0018]

【実施例】以下、この発明の実施例を図面に基づいて説
明する。この実施例に係る空気調和装置は、図1に示す
ように、圧縮機(1)と、アキュムレータ(6)と、暖
房運転時には同図に実線で示すように、また冷房運転時
には同図に破線で示すように切換わる四路切換弁(2)
と、暖房運転時には凝縮器として、また冷房運転時には
蒸発器として機能する室内側熱交換器(5)(利用側熱
交換器)と、オンオフ作動するスイッチ(10)(調整
手段)のオン作動により冷媒の加熱を行うヒータ(7)
(冷媒加熱器)と、減圧部(4)と、暖房運転時には蒸
発器として、また冷房運転時には凝縮器として機能する
室外側熱交換器(3)(熱源側熱交換器)とが順に冷媒
配管(8)により冷媒の循環が可能なように接続されて
冷媒回路(9)が形成されている。尚、圧縮機(1)と
四路切換弁(2)との間の冷媒配管(8)には、冷媒回
路(9)の冷媒圧が過負荷により所定の高圧となったと
きに作動する高圧保護装置としての圧力開閉器(HP
S)が設けられている。
Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the air conditioner according to this embodiment includes a compressor (1), an accumulator (6), a solid line in the figure during heating operation, and a broken line in the figure during cooling operation. Four-way switching valve that switches as shown in (2)
And an indoor heat exchanger (5) (use side heat exchanger) that functions as a condenser during heating operation and as an evaporator during cooling operation, and a switch (10) (adjustment means) that is turned on and off. Heater (7) for heating the refrigerant
(Refrigerant heater), decompression unit (4), and outdoor heat exchanger (3) (heat source side heat exchanger) that functions as an evaporator during heating operation and as a condenser during cooling operation in order of refrigerant piping. The refrigerant circuit (9) is formed by (8) so that the refrigerant can be circulated. The refrigerant pipe (8) between the compressor (1) and the four-way switching valve (2) has a high pressure that operates when the refrigerant pressure in the refrigerant circuit (9) becomes a predetermined high pressure due to overload. Pressure switch as a protection device (HP
S) is provided.

【0019】上記減圧部(4)は、4個の逆止弁(1
1)が配設されたブリッジ回路(12)と、このブリッ
ジ回路(12)に始端(a)と終端(b)とが接続され
た整流路(13)とからなり、冷媒が冷房サイクル及び
暖房サイクルのいずれにおいても常に整流路(13)を
一方向に流れるように構成されている。整流路(13)
には、始端(a)から順に受液器(14)(冷媒貯溜
部)と電動膨張弁(18)(膨張機構)とが介設されて
いる。
The decompression section (4) has four check valves (1
1) is arranged, and a bridge circuit (12) and a rectifying path (13) in which a start end (a) and an end (b) are connected to the bridge circuit (12). It is configured to always flow in one direction through the rectifying path (13) in any of the cycles. Rectifier (13)
A liquid receiver (14) (refrigerant reservoir) and an electric expansion valve (18) (expansion mechanism) are provided in this order from the starting end (a).

【0020】また、上記受液器(14)のガス冷媒が貯
溜する部分にはインジェクションバイパス路(21)の
一端が接続される一方、該バイパス路(21)の他端は
圧縮機(1)の中間圧部に接続されている。バイパス路
(21)の途中には電磁弁(23)(開閉手段)が介設
されており、この電磁弁(23)が開弁状態にあるとき
に、バイパス路(21)により両端の高低差圧によって
受液器(14)内のガス冷媒が上記中間圧部にインジェ
クションされるように構成されている。
Further, one end of the injection bypass passage (21) is connected to the portion of the liquid receiver (14) where the gas refrigerant is stored, while the other end of the bypass passage (21) is connected to the compressor (1). It is connected to the intermediate pressure part. A solenoid valve (23) (opening / closing means) is provided in the middle of the bypass passage (21), and when the solenoid valve (23) is in an open state, the bypass passage (21) causes a difference in height between both ends. The gas refrigerant in the liquid receiver (14) is injected into the intermediate pressure portion by the pressure.

【0021】また、室内側熱交換器(5)が設置された
室内には、該室内の空気温度(Tr)を検出して室内温
度信号を出力する室内温度センサ(15)(室内温度検
出手段)と、上記熱交換器(5)による暖冷房温度を任
意に設定するための設定温度信号を出力する等の際に使
用されるリモートコントロール式の設定器(16)(温
度設定手段)とが配設されている。さらに、上記熱交換
器(5)の熱交換管には、冷媒回路(9)での負荷を示
すものとして、該熱交換器(5)における冷媒の凝縮温
度(Tc)を検出して凝縮温度信号を出力する凝縮温度
センサ(17)(負荷検出手段)が付設されている。
Further, in the room where the indoor heat exchanger (5) is installed, an indoor temperature sensor (15) (indoor temperature detecting means) for detecting an air temperature (Tr) in the room and outputting an indoor temperature signal. ) And a remote control type setting device (16) (temperature setting means) used when outputting a set temperature signal for arbitrarily setting the heating / cooling temperature by the heat exchanger (5). It is arranged. Further, the heat exchange pipe of the heat exchanger (5) is used as a load in the refrigerant circuit (9) to detect the condensation temperature (Tc) of the refrigerant in the heat exchanger (5) to detect the condensation temperature. A condensation temperature sensor (17) (load detection means) that outputs a signal is attached.

【0022】上記室内温度信号、設定温度信号及び凝縮
温度信号は、演算装置(19)と制御装置(20)とか
らなる制御手段としてのコントローラ(C)に入力され
ており、このコントローラ(C)により、インジェクシ
ョンバイパス路(21)における電磁弁(23)の開閉
作動と、ヒータ(7)におけるスイッチ(10)のオン
オフ作動とを制御する。尚、上記コントローラ(C)は
設定器(16)からの各種出力信号を受けて、四路切換
弁(2)の切換作動や電動膨張弁(18)の開度調整作
動等の制御も行う。
The room temperature signal, the set temperature signal and the condensing temperature signal are input to a controller (C) as a control means composed of an arithmetic unit (19) and a control unit (20). Thus, the opening / closing operation of the solenoid valve (23) in the injection bypass passage (21) and the on / off operation of the switch (10) in the heater (7) are controlled. The controller (C) receives various output signals from the setter (16) and also controls the switching operation of the four-way switching valve (2) and the opening degree adjusting operation of the electric expansion valve (18).

【0023】上記制御のうち室内温度信号と設定温度信
号とに基づく暖房運転制御は、室内温度信号による室内
温度(Tr)を、設定温度信号による設定温度(T2)
と比較してなされる。具体的には、設定温度(T2)の
上下にそれぞれ上限温度(T3)及び下限温度(T1)
が定められ、これらの温度(T2),(T3),(T
1)と上記室内温度(Tr)とが比較され、この比較に
基づいて3つのパターンの暖房運転が選択して制御され
る。3つのパターンとは、電磁弁(23)が閉状態でイ
ンジェクションが行われず、かつスイッチ(10)がオ
フ状態で冷媒の加熱も行われない通常暖房運転の「Aパ
ターン」と、電磁弁(23)が開作動してインジェクシ
ョンが行われ、かつスイッチ(10)がオフ状態で冷媒
加熱の行われない中間暖房運転の「Bパターン」と、電
磁弁(23)が開状態でインジェクションが行われ、か
つスイッチ(10)がオン作動して冷媒加熱が行われる
急速暖房運転の「Cパターン」であり、各パターンの暖
房能力は、図2に示すように「Aパターン」、「Bパタ
ーン」、「Cパターン」の順に大きくなっている。
In the heating operation control based on the room temperature signal and the set temperature signal among the above controls, the room temperature (Tr) based on the room temperature signal and the set temperature (T2) based on the set temperature signal are set.
Made in comparison with. Specifically, the upper limit temperature (T3) and the lower limit temperature (T1) above and below the set temperature (T2), respectively.
Are determined, and these temperatures (T2), (T3), (T
1) is compared with the indoor temperature (Tr), and three patterns of heating operation are selected and controlled based on this comparison. The three patterns are the "A pattern" of normal heating operation in which the solenoid valve (23) is closed and injection is not performed, and the switch (10) is off and the refrigerant is not heated, and the solenoid valve (23). ) Is opened and injection is performed, and the switch (10) is in the OFF state and the refrigerant heating is not performed in the “B pattern” of the intermediate heating operation, and the solenoid valve (23) is in the opened state, and injection is performed. In addition, the switch (10) is turned on to perform the refrigerant heating, which is the "C pattern" of the rapid heating operation, and the heating capacity of each pattern is "A pattern", "B pattern", "as shown in FIG. It becomes large in the order of "C pattern".

【0024】上記コントローラ(C)による暖房運転中
の制御処理を、図3のフローチャートに基づいて説明す
る。処理開始後のステップS1で、先ず「Aパターン」
の暖房運転を行う。ステップS2では、室内温度(T
r)を上限温度(T3)及び下限温度(T1)と比較す
る。室内温度(Tr)が上限温度(T3)よりも既に大
きい場合(T3<Tr)には、ステップS3に移行して
「Aパターン」を維持する。室内温度(Tr)が下限温
度(T1)よりも未だ小さい場合(Tr<T1)には、
ステップS4に移行して「Cパターン」に変更し、急速
暖房を行う。室内温度(Tr)が下限温度(T1)と上
限温度(T3)との間にある場合(T1≦Tr≦T3)
には、ステップS5に移行して、現在の暖房運転のパタ
ーンを判断する。「Aパターン」の場合にはステップS
6に、また「Cパターン」の場合にはステップS7にそ
れぞれ移行する。尚、「Bパターン」の場合には「Bパ
ターン」を維持し、ステップS12に移行して暖房停止
であれば暖房運転制御を終了し、否であればステップS
2に戻る。
The control process during the heating operation by the controller (C) will be described with reference to the flowchart of FIG. In step S1 after the start of processing, first, "A pattern"
Heating operation. In step S2, the room temperature (T
r) is compared with the upper temperature limit (T3) and the lower temperature limit (T1). When the room temperature (Tr) is already higher than the upper limit temperature (T3) (T3 <Tr), the process proceeds to step S3 and the "A pattern" is maintained. When the room temperature (Tr) is still lower than the lower limit temperature (T1) (Tr <T1),
In step S4, the pattern is changed to the "C pattern" and rapid heating is performed. When the room temperature (Tr) is between the lower limit temperature (T1) and the upper limit temperature (T3) (T1 ≦ Tr ≦ T3)
In step S5, the current heating operation pattern is determined. In case of “A pattern”, step S
6, and in the case of "C pattern", the process proceeds to step S7. In the case of the "B pattern", the "B pattern" is maintained, and the process proceeds to step S12 to end the heating operation control if the heating is stopped, and if not, to step S12.
Return to 2.

【0025】上記ステップS6では、室内温度(Tr)
を設定温度(T2)と比較し、室内温度(Tr)が設定
温度(T2)に満たない場合(Tr<T2)には、ステ
ップS8に移行して「Aパターン」を「Bパターン」に
変更し、ステップS12を経てステップS2に戻る。ま
た、室内温度(Tr)が設定温度(T2)以上の場合
(T2≦Tr)には「Aパターン」を維持し、ステップ
S12を経てステップS2に戻る。
In step S6, the room temperature (Tr)
Is compared with the set temperature (T2), and when the indoor temperature (Tr) is less than the set temperature (T2) (Tr <T2), the process proceeds to step S8 and the “A pattern” is changed to the “B pattern”. Then, the process returns to step S2 through step S12. When the room temperature (Tr) is equal to or higher than the set temperature (T2) (T2 ≦ Tr), the “A pattern” is maintained, and the process returns to step S2 through step S12.

【0026】一方、ステップS7でも室内温度(Tr)
を設定温度(T2)と比較する。そして、室内温度(T
r)が設定温度(T2)に満たない場合(Tr<T2)
には、ステップS10に移行して「Cパターン」を維持
し、ステップS12を経てステップS2に戻る。また、
室内温度(Tr)が設定温度(T2)以上の場合(T2
≦Tr)には、ステップS11に移行して「Cパター
ン」を「Aパターン」に変更し、ステップS12を経て
ステップS2に戻る。尚、この暖房運転制御で、例えば
ステップS2でT1≦Tr≦T3の場合には「Bパター
ン」とし、ステップS5で「Bパターン」の場合でもス
テップS6に移行するようにしてもよい。
On the other hand, even in step S7, the room temperature (Tr)
Is compared with the set temperature (T2). And the room temperature (T
When r) is less than the set temperature (T2) (Tr <T2)
In step S10, the "C pattern" is maintained and the process returns to step S2 via step S12. Also,
When the room temperature (Tr) is higher than the set temperature (T2) (T2
For ≦ Tr), the process proceeds to step S11, the “C pattern” is changed to the “A pattern”, and the process returns to step S2 via step S12. In this heating operation control, for example, if T1 ≦ Tr ≦ T3 in step S2, the “B pattern” may be set, and even in the case of “B pattern” in step S5, the process may proceed to step S6.

【0027】ところで、上記暖房運転中に、室内側熱交
換器(5)における冷媒凝縮温度が限度に近い状態でヒ
ータ(7)が作動すると、高圧が急激に上昇して圧力開
閉器(HPS)が作動して装置が停止してしまい、暖房
運転自体が行われなくなる。そこで、コントローラ
(C)ではこのような過負荷が生じるのを防止するため
に、上記凝縮温度信号からの凝縮温度(Tc)を、圧力
開閉器(HPS)に設定されている定数温度(Tcmax
)に基づいて判断し、この判断に基づいて上記3つの
暖房パターンを制御する。具体的には、一般的には50
℃強である定数温度(Tcmax )に対して例えば43℃
の警戒温度(Ta)を設定しており、この警戒温度(T
a)と上記凝縮温度(Tc)とを比較して制御がなされ
る。
By the way, during the heating operation, when the heater (7) is operated in a state where the refrigerant condensation temperature in the indoor heat exchanger (5) is close to the limit, the high pressure rapidly rises and the pressure switch (HPS). Is activated and the device is stopped, and the heating operation itself is not performed. Therefore, in order to prevent such an overload from occurring in the controller (C), the condensing temperature (Tc) from the condensing temperature signal is set to the constant temperature (Tcmax set in the pressure switch (HPS)).
), And controls the three heating patterns based on this determination. Specifically, generally 50
For example, 43 ℃ for a constant temperature (Tcmax) that is a little over ℃
The warning temperature (Ta) of the
Control is performed by comparing a) with the condensation temperature (Tc).

【0028】上記過負荷防止のためにコントローラ
(C)では、暖房運転が「Bパターン」で行われている
場合には、図4に示すサブルーチンが処理される。つま
り、ステップS21で凝縮温度(Tc)を警戒温度(T
a)と比較する。そして、凝縮温度(Tc)が警戒温度
(Ta)以下の場合(Tc≦Ta)には、ステップS2
2に移行して「Bパターン」を維持し、また凝縮温度
(Tc)が警戒温度(Ta)を越えた場合(Ta<T
c)には、ステップS23に移行して「Aパターン」に
変更する。
To prevent the overload, the controller (C) processes the subroutine shown in FIG. 4 when the heating operation is performed in the "B pattern". That is, in step S21, the condensation temperature (Tc) is changed to the warning temperature (Tc).
Compare with a). If the condensing temperature (Tc) is equal to or lower than the warning temperature (Ta) (Tc ≦ Ta), step S2
If the condensation temperature (Tc) exceeds the caution temperature (Ta) while maintaining the “B pattern” by shifting to 2 (Ta <T
In c), the process moves to step S23 and is changed to "A pattern".

【0029】一方、暖房運転が「Cパターン」で行われ
ている場合には、図5に示すサブルーチンが処理され
る。すなわち、ステップS31で凝縮温度(Tc)を警
戒温度(Ta)と比較し、凝縮温度(Tc)が警戒温度
(Ta)以下の場合(Tc≦Ta)には、ステップS3
2に移行して「Cパターン」を維持する。また、凝縮温
度(Tc)が警戒温度(Ta)を越えた場合(Ta<T
c)には、ステップS33に移行して「Aパターン」に
変更する。尚、上記暖房運転制御はこの過負荷防止制御
による制限内で行われる。
On the other hand, when the heating operation is performed in the "C pattern", the subroutine shown in FIG. 5 is processed. That is, the condensation temperature (Tc) is compared with the warning temperature (Ta) in step S31, and when the condensation temperature (Tc) is equal to or lower than the warning temperature (Ta) (Tc ≦ Ta), step S3.
Shift to 2 and maintain "C pattern". When the condensation temperature (Tc) exceeds the caution temperature (Ta) (Ta <T
In step c33, the process shifts to step S33 and the pattern is changed to the "A pattern". The heating operation control is performed within the limit of this overload prevention control.

【0030】以上のように構成された空気調和装置の作
動について説明する。冷房運転時には、コントローラ
(C)により四路切換弁(2)が図1の破線位置に切換
作動される一方、電磁弁(23)が閉作動されてインジ
ェクションバイパス路(21)が閉鎖され、冷媒は冷媒
回路(9)のみを循環する。冷媒は室外側熱交換器
(3)に流入して凝縮し、室内側熱交換器(5)で蒸発
することにより室内空気を冷房する。
The operation of the air conditioner configured as above will be described. During the cooling operation, the controller (C) causes the four-way switching valve (2) to be switched to the position indicated by the broken line in FIG. 1, while the solenoid valve (23) is closed to close the injection bypass passage (21) and the refrigerant. Circulates only in the refrigerant circuit (9). The refrigerant flows into the outdoor heat exchanger (3), is condensed, and is evaporated in the indoor heat exchanger (5) to cool the indoor air.

【0031】暖房運転時には、コントローラ(C)によ
り四路切換弁(2)が図1の実線位置に切換作動され
る。先ず、通常暖房運転である「Aパターン」では、電
磁弁(23)が閉作動されてインジェクションバイパス
路(21)が閉鎖され、冷媒は冷媒回路(9)のみを循
環する。冷媒は室内側熱交換器(5)に流入し、該熱交
換器(5)で凝縮して室内空気を加熱し、ブリッジ回路
(12)を経て受液器(14)に流入する。この受液器
(14)において、冷媒の一部は気化してガス冷媒の状
態で、また残りは液冷媒の状態で貯溜される。この液冷
媒は整流路(13)の電動膨張弁(18)に流入し、該
膨張弁(18)で減圧される。減圧後の冷媒は、室外側
熱交換器(3)で蒸発する。
During the heating operation, the controller (C) switches the four-way switching valve (2) to the position indicated by the solid line in FIG. First, in the "A pattern" which is the normal heating operation, the solenoid valve (23) is closed to close the injection bypass passage (21), and the refrigerant circulates only in the refrigerant circuit (9). The refrigerant flows into the indoor heat exchanger (5), condenses in the heat exchanger (5) to heat the indoor air, and flows into the liquid receiver (14) via the bridge circuit (12). In the liquid receiver (14), a part of the refrigerant is vaporized and stored in a gas refrigerant state, and the rest is stored in a liquid refrigerant state. This liquid refrigerant flows into the electric expansion valve (18) of the rectification path (13) and is decompressed by the expansion valve (18). The decompressed refrigerant evaporates in the outdoor heat exchanger (3).

【0032】また、中間暖房運転である「Bパターン」
では、電磁弁(23)が開作動されてインジェクション
バイパス路(21)が開通状態となることにより、受液
器(14)内のガス冷媒が、上記バイパス路(21)を
通って圧縮機(1)の中間圧部にインジェクションされ
る。これにより、圧縮機(1)入力が増加され、暖房能
力が高められる。
[B pattern] which is an intermediate heating operation
Then, the electromagnetic valve (23) is opened to open the injection bypass passage (21), so that the gas refrigerant in the liquid receiver (14) passes through the bypass passage (21) and the compressor ( It is injected into the intermediate pressure part of 1). As a result, the input of the compressor (1) is increased and the heating capacity is enhanced.

【0033】さらに、急速暖房運転である「Cパター
ン」では、スイッチ(10)がオン作動されてヒータ
(7)で加熱された冷媒が室外側熱交換器(3)に流入
する。これにより、該熱交換器(3)入力が増加され、
暖房能力がさらに高められる。
Further, in the "C pattern" which is the rapid heating operation, the switch (10) is turned on and the refrigerant heated by the heater (7) flows into the outdoor heat exchanger (3). This increases the heat exchanger (3) input,
The heating capacity is further enhanced.

【0034】そして、室内温度(Tr)が下限温度(T
1)に満たない場合には、「Cパターン」の急速暖房運
転が行われ、室内温度(Tr)が下限温度(T1)と上
限温度(T3)との間にある場合、つまり室内温度(T
r)が設定温度(T2)の上下付近にある場合には「A
パターン」の通常運転及び「Bパターン」の中間暖房運
転を交えた暖房運転が行われる。
The room temperature (Tr) is lower than the lower limit temperature (T
If it is less than 1), the rapid heating operation of the “C pattern” is performed, and if the room temperature (Tr) is between the lower limit temperature (T1) and the upper limit temperature (T3), that is, the room temperature (T
If r) is above and below the set temperature (T2), "A"
The heating operation including the “pattern” normal operation and the “B pattern” intermediate heating operation is performed.

【0035】これにより、室内温度(Tr)が設定温度
(T2)よりもかなり低い場合には、「Cパターン」の
急速暖房運転によって室内温度(Tr)を設定温度(T
2)に短時間で近づけるようにし、室内温度(Tr)が
設定温度(T2)に近づいた場合には、「Aパターン」
の通常暖房運転及び「Bパターン」の中間暖房運転を交
えて能力変化の小さい、従って設定温度(T2)の上下
付近におけるハンチングの小さい暖房運転が行われる。
一方、暖房能力の高まりに応じて凝縮温度(Tc)が圧
力開閉器(HPS)の定数温度(Tcmax )に達しない
ように上記暖房パターンが制御されることにより、冷媒
回路(9)に過負荷が生じて暖房運転が停止するという
事態が回避され、上記暖房運転が確実に維持される。
Thus, when the room temperature (Tr) is considerably lower than the set temperature (T2), the room temperature (Tr) is set by the rapid heating operation of the "C pattern".
2) in a short time, and when the room temperature (Tr) approaches the set temperature (T2), "A pattern"
The normal heating operation and the intermediate heating operation of the “B pattern” are combined, and thus the heating operation with a small capacity change, and thus the hunting with small hunting above and below the set temperature (T2) is performed.
On the other hand, the heating pattern is controlled so that the condensing temperature (Tc) does not reach the constant temperature (Tcmax) of the pressure switch (HPS) according to the increase of the heating capacity, so that the refrigerant circuit (9) is overloaded. The situation in which the heating operation is stopped due to the occurrence of the above is avoided, and the heating operation is reliably maintained.

【0036】尚、上記実施例の空気調和装置は冷暖房兼
用機であるが、この発明に係る空気調和装置は暖房専用
機であってもよい。
Although the air conditioner of the above embodiment is a combined air conditioner and heater, the air conditioner according to the present invention may be a dedicated heating machine.

【0037】また、上記実施例では、冷媒加熱器を室内
側熱交換器と減圧部との間に設けているが、冷媒加熱器
は整流路の始端と受液器との間や該受液器内に設けても
よい。 また、上記実施例では、インジェクションバイ
パス路の終端を圧縮機の中間圧部に接続しているが、圧
縮機の吸入口に接続してもよい。
Further, in the above embodiment, the refrigerant heater is provided between the indoor heat exchanger and the pressure reducing section. However, the refrigerant heater is provided between the start end of the rectifying path and the liquid receiver or the liquid receiver. It may be provided in the container. Further, in the above embodiment, the end of the injection bypass passage is connected to the intermediate pressure portion of the compressor, but it may be connected to the suction port of the compressor.

【0038】さらに、上記実施例では、利用側熱交換器
における凝縮温度によって冷媒回路の負荷を検出してい
るが、圧縮機のモータ電流や吐出管温度等によって負荷
を検出するようにしてもよい。
Further, in the above embodiment, the load of the refrigerant circuit is detected by the condensation temperature in the heat exchanger on the use side, but the load may be detected by the motor current of the compressor, the discharge pipe temperature, or the like. .

【0039】[0039]

【発明の効果】以上説明したように、請求項1の発明に
よれば、冷媒加熱器を、インジェクションバイパス路に
設置するのに代えて、利用側熱交換器と冷媒貯溜部との
間及び該冷媒貯溜部を含む位置に介設したことにより、
上記バイパス路によるインジェクションを冷媒加熱器の
作動に拘りなく行うことができるので、通常暖房運転と
急速暖房運転とのほかに、通常暖房運転中に冷媒加熱を
伴わないインジェクションを行って暖房能力が両者の中
間程度である中間暖房運転を行うことができる。従っ
て、冷媒加熱器の作動の有無によって生じる通常暖房運
転と急速暖房運転との間の大きな暖房能力差を上記中間
暖房運転により補間することができるので、暖房能力差
の小さい暖房運転を行うことができる。
As described above, according to the first aspect of the invention, instead of installing the refrigerant heater in the injection bypass passage, the refrigerant heater is provided between the utilization side heat exchanger and the refrigerant reservoir, and By interposing in the position including the refrigerant reservoir,
Since the injection by the bypass passage can be performed regardless of the operation of the refrigerant heater, in addition to the normal heating operation and the rapid heating operation, injection without refrigerant heating is performed during the normal heating operation so that the heating capacity is both. It is possible to perform an intermediate heating operation that is about the middle of the above. Therefore, since a large heating capacity difference between the normal heating operation and the rapid heating operation caused by the operation of the refrigerant heater can be interpolated by the intermediate heating operation, the heating operation with a small heating capacity difference can be performed. it can.

【0040】また、請求項2の発明によれば、室内温度
を設定温度と比較し、この比較に基づいて上記3パター
ンの暖房運転を制御するようにしたことにより、3つの
パターンを使い分けて効率のよい暖房運転制御を行うこ
とができ、設定温度付近における暖房温度のハンチング
抑制を図ることができる。
According to the second aspect of the present invention, the indoor temperature is compared with the set temperature, and the heating operation of the above three patterns is controlled based on this comparison. It is possible to perform a good heating operation control and suppress hunting of the heating temperature near the set temperature.

【0041】さらに、請求項3の発明によれば、冷媒回
路の負荷に基づいて上記3パターンを制御するようにし
たことにより、冷媒回路に過負荷が生じるのを防止する
ことができるので、上記過負荷により暖房運転自体が停
止するという事態を回避することができ、暖房運転を安
定的に維持継続することができる。
Further, according to the invention of claim 3, since the three patterns are controlled based on the load of the refrigerant circuit, it is possible to prevent the refrigerant circuit from being overloaded. It is possible to avoid a situation where the heating operation itself stops due to an overload, and it is possible to stably maintain and continue the heating operation.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の実施例に係る空気調和装置の冷媒回
路図である。
FIG. 1 is a refrigerant circuit diagram of an air conditioner according to an embodiment of the present invention.

【図2】各パターンの暖房能力を示す比較図である。FIG. 2 is a comparative diagram showing the heating capacity of each pattern.

【図3】暖房運転のパターン制御を示すフローチャート
図である。
FIG. 3 is a flowchart showing pattern control of heating operation.

【図4】中間暖房運転中における過負荷防止のサブルー
チンを示すフローチャート図である。
FIG. 4 is a flowchart showing a subroutine of overload prevention during an intermediate heating operation.

【図5】急速暖房運転中における過負荷防止のサブルー
チンを示すフローチャート図である。
FIG. 5 is a flowchart showing a subroutine for overload prevention during rapid heating operation.

【符号の説明】[Explanation of symbols]

(1) 圧縮機 (3) 室外側熱交換器(熱源側熱交換器) (5) 室内側熱交換器(利用側熱交換器) (7) ヒータ(冷媒加熱器) (8) 冷媒配管 (9) 冷媒回路 (10) スイッチ(調整手段) (14) 受液器(冷媒貯溜部) (15) 室内温度センサ(室内温度検出手段) (16) 設定器(温度設定手段) (17) 凝縮温度センサ(負荷検出手段) (18) 電動膨張弁(膨張機構) (21) インジェクションバイパス路 (23) 電磁弁(開閉手段) (C) コントローラ(制御手段) (Tr) 室内温度 (T2) 設定温度 (Tc) 凝縮温度(負荷) (1) Compressor (3) Outdoor heat exchanger (heat source side heat exchanger) (5) Indoor side heat exchanger (use side heat exchanger) (7) Heater (refrigerant heater) (8) Refrigerant piping ( 9) Refrigerant circuit (10) Switch (adjusting means) (14) Liquid receiver (refrigerant reservoir) (15) Indoor temperature sensor (indoor temperature detecting means) (16) Setting device (temperature setting means) (17) Condensing temperature Sensor (load detection means) (18) Electric expansion valve (expansion mechanism) (21) Injection bypass passage (23) Electromagnetic valve (opening / closing means) (C) Controller (control means) (Tr) Room temperature (T2) Set temperature ( Tc) Condensation temperature (load)

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 圧縮機(1)と、利用側熱交換器(5)
と、膨張機構(18)と、熱源側熱交換器(3)とが冷
媒配管(8)により順に接続されて暖房運転可能な冷媒
回路(9)を備えた空気調和装置であって、 上記利用側熱交換器(5)と膨張機構(18)との間の
冷媒配管(8)に介設され、冷媒を貯溜する冷媒貯溜部
(14)と、 一端が上記冷媒貯溜部(14)のガス貯溜部に開口する
一方、他端が上記圧縮機(1)の吸込側に接続され、該
圧縮機(1)に冷媒ガスのインジェクションが可能なイ
ンジェクションバイパス路(21)と、 上記インジェクションバイパス路(21)の開閉作動を
行う開閉手段(23)と、 上記利用側熱交換器(5)と冷媒貯溜部(14)との間
の冷媒配管(8)及び該貯溜部(14)を含む位置の適
所に配設され、冷媒の加熱が可能な冷媒加熱器(7)
と、 上記冷媒加熱器(7)による加熱度の調整作動を行う調
整手段(10)とを備えたことを特徴とする空気調和装
置。
1. A compressor (1) and a utilization side heat exchanger (5)
And an expansion mechanism (18) and a heat source side heat exchanger (3) are connected in order by a refrigerant pipe (8), and an air conditioner equipped with a refrigerant circuit (9) capable of heating operation. A refrigerant reservoir (14) which is provided in the refrigerant pipe (8) between the side heat exchanger (5) and the expansion mechanism (18) and stores a refrigerant, and a gas of which one end has the refrigerant reservoir (14). An injection bypass passage (21), which is open to the storage portion and has the other end connected to the suction side of the compressor (1) and capable of injecting a refrigerant gas into the compressor (1), and the injection bypass passage (21). 21) opening and closing means (23) for opening and closing, a refrigerant pipe (8) between the utilization side heat exchanger (5) and the refrigerant reservoir (14), and a position including the reservoir (14). Refrigerant heater (7) that is placed in the proper place and can heat the refrigerant
And an adjusting means (10) for adjusting the degree of heating by the refrigerant heater (7).
【請求項2】 利用側熱交換器(5)における室内温度
(Tr)を検出する室内温度検出手段(15)と、 目標室内温度を設定する温度設定手段(16)と、 上記室内温度検出手段(15)及び温度設定手段(1
6)の各出力信号を受け、室内温度検出手段(15)で
検出された室内温度(Tr)を温度設定手段(16)に
よる設定温度(T2)と比較して、開閉手段(23)の
開閉作動及び調整手段(10)の調整作動をそれぞれ制
御する制御手段(C)とを備えたことを特徴とする請求
項1記載の空気調和装置。
2. An indoor temperature detecting means (15) for detecting an indoor temperature (Tr) in the use side heat exchanger (5), a temperature setting means (16) for setting a target indoor temperature, and the indoor temperature detecting means. (15) and temperature setting means (1
Receiving each output signal of 6), the indoor temperature (Tr) detected by the indoor temperature detecting means (15) is compared with the set temperature (T2) by the temperature setting means (16), and the opening / closing means (23) is opened / closed. The air conditioner according to claim 1, further comprising a control means (C) for controlling the operation and the adjusting operation of the adjusting means (10).
【請求項3】 冷媒回路(9)での負荷(Tc)を検出
する負荷検出手段(17)を備え、 制御手段(C)は、上記負荷検出手段(17)の出力信
号を受け、冷媒回路(9)での開閉手段(23)の開閉
作動及び調整手段(10)の調整作動をそれぞれ制御す
るように構成されていることを特徴とする請求項2記載
の空気調和装置。
3. A load detection means (17) for detecting a load (Tc) in the refrigerant circuit (9), wherein the control means (C) receives an output signal of the load detection means (17) and receives the output signal. The air conditioner according to claim 2, wherein the air conditioner is configured to control the opening / closing operation of the opening / closing means (23) and the adjusting operation of the adjusting means (10) in (9).
JP18919692A 1992-07-16 1992-07-16 Air conditioner Expired - Fee Related JP3334169B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18919692A JP3334169B2 (en) 1992-07-16 1992-07-16 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18919692A JP3334169B2 (en) 1992-07-16 1992-07-16 Air conditioner

Publications (2)

Publication Number Publication Date
JPH0634221A true JPH0634221A (en) 1994-02-08
JP3334169B2 JP3334169B2 (en) 2002-10-15

Family

ID=16237132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18919692A Expired - Fee Related JP3334169B2 (en) 1992-07-16 1992-07-16 Air conditioner

Country Status (1)

Country Link
JP (1) JP3334169B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6468888A (en) * 1987-09-10 1989-03-14 Mitsubishi Electric Corp Vehicle classification discriminating device
WO2020066005A1 (en) * 2018-09-28 2020-04-02 三菱電機株式会社 Refrigeration cycle apparatus
WO2020066001A1 (en) * 2018-09-28 2020-04-02 三菱電機株式会社 Refrigeration cycle device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6468888A (en) * 1987-09-10 1989-03-14 Mitsubishi Electric Corp Vehicle classification discriminating device
WO2020066005A1 (en) * 2018-09-28 2020-04-02 三菱電機株式会社 Refrigeration cycle apparatus
WO2020066001A1 (en) * 2018-09-28 2020-04-02 三菱電機株式会社 Refrigeration cycle device
CN112752935A (en) * 2018-09-28 2021-05-04 三菱电机株式会社 Refrigeration cycle device
JPWO2020066005A1 (en) * 2018-09-28 2021-08-30 三菱電機株式会社 Refrigeration cycle equipment
JPWO2020066001A1 (en) * 2018-09-28 2021-08-30 三菱電機株式会社 Refrigeration cycle equipment
CN112752935B (en) * 2018-09-28 2022-08-09 三菱电机株式会社 Refrigeration cycle device

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