JPH0239716B2 - - Google Patents
Info
- Publication number
- JPH0239716B2 JPH0239716B2 JP58184658A JP18465883A JPH0239716B2 JP H0239716 B2 JPH0239716 B2 JP H0239716B2 JP 58184658 A JP58184658 A JP 58184658A JP 18465883 A JP18465883 A JP 18465883A JP H0239716 B2 JPH0239716 B2 JP H0239716B2
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- heat exchanger
- valve
- line
- defrost
- 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 40
- 238000010438 heat treatment Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000010257 thawing Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Description
【発明の詳細な説明】
冷房運転と暖房運転に切換えができる従来のヒ
ートポンプにおいては、暖房運転時に空気熱交換
器に霜が付くと、一旦冷房運転に切換えるととも
に送風機も一時停止させてデフロストを行つてい
る。[Detailed description of the invention] In conventional heat pumps that can be switched between cooling operation and heating operation, if frost forms on the air heat exchanger during heating operation, the system switches to cooling operation and temporarily stops the blower to defrost the air. It's on.
したがつて、デフロスト時においてチラー式で
あれば暖房運転時に折角温められた温水の温度が
低下し、またパツケージタイプのばあいでは冷風
が吹き出されて、デフロスト中は室内へ冷い空気
が送り込まれる。 Therefore, during defrosting, if the chiller type is used, the temperature of the hot water heated during heating operation will drop, and if the package type is used, cold air will be blown out, and cold air will be sent into the room during defrosting. .
本発明は、暖房運転時において付いた霜を除去
する際、蒸発器となつている空気熱交換器へホツ
トガスが供給される構造のものとすることによ
り、デフロスト中にチラー式であれば温水の温度
が低下させられることがなく、またパツケージ式
では冷い空気が送り出されることがなくて、被空
調室の温度低下を招くことなくデフロストを行え
るようにしたヒートポンプに関する。 The present invention has a structure in which hot gas is supplied to an air heat exchanger serving as an evaporator when removing frost formed during heating operation. The present invention relates to a heat pump that does not lower the temperature and does not send out cold air in the case of a package type heat pump, so that defrosting can be performed without causing a drop in the temperature of an air-conditioned room.
以下実施例図に基いて本発明を説明する。 The present invention will be explained below based on embodiment figures.
第１図矢示のごとく、圧縮機１からの冷媒は４
方切換弁２に入り、その切換ポート２ｂよりライ
ン３、分岐ライン３ａ，３ｂを経て１対の空気熱
交換器４ａ，４ｂへ一端ａから送られ、この空気
熱交換器４ａ，４ｂは冷房運転時には凝縮器の作
用をする。
As shown by the arrow in Figure 1, the refrigerant from compressor 1 is 4
It enters the switching valve 2, passes through the switching port 2b to the line 3, branch lines 3a and 3b, and is sent from one end a to a pair of air heat exchangers 4a and 4b, which are in cooling operation. Sometimes it acts as a condenser.
空気熱交換器４ａ，４ｂからの液冷媒は逆止弁
CV、過冷却コイル５ａ，５ｂを経て合流し、合
流ライン６、操作弁V1、ドライヤストレーナ７、
冷房時開の弁V3、膨張弁EVを経て水熱交換器８
内の伝熱管９に入り、ここで同水熱交換器内の水
を冷却する。水熱交換器の伝熱管を通つた冷媒は
ライン１０を経て前記４方弁２の切換ポート２
ｄ，２ｃを通り、ライン１１からアキユムレータ
１２を経て圧縮機１に吸入される。 The liquid refrigerant from the air heat exchangers 4a and 4b is supplied with a check valve.
CV, merge through supercooling coils 5a and 5b, merge line 6, operation valve V 1 , dryer strainer 7,
Valve V 3 that opens during cooling, and water heat exchanger 8 via expansion valve EV
The water enters the heat exchanger tube 9 inside the water heat exchanger, where it cools the water inside the water heat exchanger. The refrigerant that has passed through the heat transfer tube of the water heat exchanger passes through the line 10 to the switching port 2 of the four-way valve 2.
d and 2c, and is sucked into the compressor 1 from the line 11 via the accumulator 12.
しかして前記水熱交換器８内の冷水は出口８ａ
から空調室内に配置してある空調器２１へ送られ
て、同空調器により室内冷房がなされ、空調器か
らの冷却水は前記水熱交換器８内へ入口８ｂより
戻る。 Therefore, the cold water in the water heat exchanger 8 is discharged from the outlet 8a.
The cooling water is then sent to an air conditioner 21 disposed in the air conditioned room, where the air conditioner cools the room, and the cooling water from the air conditioner returns to the water heat exchanger 8 through the inlet 8b.
第２図実線矢印のごとく、圧縮機１からの冷媒
は４方弁２の切換ポート２ａ，２ｄを経て前記ラ
イン１０を逆流し、水熱交換器８内の伝熱管９へ
冷房時とは逆方向から入り、同熱交換器内の水を
加熱する。水熱交換器８内の加熱された温水は出
口８ａから空調器２１へ送られて室内を暖房し、
同空調器を経た温水は水熱交換器８内へ入口８ｂ
から戻る。
As shown by the solid line arrow in Figure 2, the refrigerant from the compressor 1 passes through the switching ports 2a and 2d of the four-way valve 2, flows backward through the line 10, and flows into the heat transfer tubes 9 in the water heat exchanger 8 in the opposite direction to that used during cooling. It enters from the same direction and heats the water in the heat exchanger. The heated hot water in the water heat exchanger 8 is sent from the outlet 8a to the air conditioner 21 to heat the room,
The hot water that has passed through the air conditioner enters the water heat exchanger 8 at the inlet 8b.
Return from
冷媒が水熱交換機８の伝熱管９と熱交換するこ
とによつて凝縮した液冷媒は、前記膨張弁EVの
２次側から前記操作弁V1へ接続したバイパスラ
イン１３を逆流し、暖房時に開く弁、例えば逆止
弁１４、操作弁V1を経て、前記ライン６に入り、
同ラインから分れる暖房時用ライン１５、ドライ
ヤストレーナ１６、開にされた電磁弁V2、分岐
ライン１７ａと１７ｂ、減圧器を兼ねる分配器１
８ａと１８ｂを経て前記空気熱交換器４ａ，４ｂ
へ冷房時とは反対側から送り込まれる。 The liquid refrigerant condensed by exchanging heat with the heat transfer tubes 9 of the water heat exchanger 8 flows backward through the bypass line 13 connected from the secondary side of the expansion valve EV to the operation valve V1 , and is used during heating. enters the line 6 through an opening valve, for example a check valve 14, an operating valve V1 ;
A heating line 15 that branches off from the same line, a dryer strainer 16, an opened solenoid valve V 2 , branch lines 17a and 17b, and a distributor 1 that also serves as a pressure reducer
8a and 18b to the air heat exchangers 4a and 4b.
It is sent from the opposite side to that used for cooling.
多数の細管よりなる分配管１８ａ，１８ｂ内を
通過する際に減圧されて低温になつた液冷媒は、
空気熱交換器４ａ，４ｂを通過する際に吸熱する
ことで温度上昇し、ライン３ａ，３ｂからライン
３を経て４方切換弁２へポート２ｂより入り、ポ
ート２ｃからライン１１、アキユムレータ１２を
経て圧縮機１に吸入される。 The liquid refrigerant, which is reduced in pressure and has a low temperature while passing through the distribution pipes 18a and 18b consisting of a large number of thin tubes, is
The temperature increases by absorbing heat when passing through the air heat exchangers 4a and 4b, and the air enters the four-way switching valve 2 from the port 2b through the lines 3a and 3b, and then passes through the line 11 and the accumulator 12 from the port 2c. It is sucked into the compressor 1.
本発明は暖房時におけるデフロスト運転に特徴
を持たせたもので、次のような回路を構成せしめ
てある。
The present invention is characterized by defrost operation during heating, and has the following circuit configuration.
圧縮機１と４方切換弁２間の高圧ラインからデ
フロストライン１９を分岐せしめて、同ラインに
デフロスト時に開くデフロスト弁DVを設け、こ
のデフロスト弁DVを分岐デフロストライン２０
ａ，２０ｂによつて前記空気熱交換器への暖房時
の冷媒供給部、すなわち前記分配器１８ａ，１８
ｂへ接続せしめてある。 A defrost line 19 is branched from the high pressure line between the compressor 1 and the four-way switching valve 2, and a defrost valve DV that opens during defrosting is provided in the same line, and this defrost valve DV is connected to the branch defrost line 20.
a, 20b supply a refrigerant to the air heat exchanger during heating, that is, the distributors 18a, 18.
It is connected to b.
したがつて、暖房運転時においてデフロストを
行うには前記デフロスト弁DVを開く。 Therefore, in order to defrost during heating operation, the defrost valve DV is opened.
かくすることにより、圧縮機１からの暖房運転
用のホツトガスの一部は、破線矢示のごとくデフ
ロスト弁DVを経てデフロストライン１９，２０
ａ，２０ｂから分配器１８ａ，１８ｂへ至り、水
熱交換器８内で凝縮した液冷媒とともに分配器１
８ａ，１８ｂを通過する。 By doing this, a part of the hot gas for heating operation from the compressor 1 is transferred to the defrost lines 19 and 20 via the defrost valve DV as indicated by the broken line arrow.
a, 20b to the distributors 18a, 18b, and the liquid refrigerant condensed in the water heat exchanger 8 is transferred to the distributor 1.
8a and 18b.
しかし、分配器１８ａ，１８ｂを通過する際に
液冷媒は通過抵抗が高まるために減圧されるが、
デフロストラインから分配器１８ａ，１８ｂへ供
給されたホツトガス状態の冷媒は通過抵抗が極め
て小であるためにほとんど減圧されず、高温のま
ま分配器内を通つてゆく。 However, when passing through the distributors 18a and 18b, the liquid refrigerant is depressurized due to increased passage resistance;
The refrigerant in a hot gas state supplied from the defrost line to the distributors 18a and 18b has extremely low passage resistance, so the pressure is hardly reduced, and the refrigerant passes through the distributors while remaining at a high temperature.
したがつて、デフロストラインから供給された
ホツトガスと、減圧されて低温になつた冷媒とが
同時に分配器内を通ることにより、空気熱交換器
４ａ，４ｂへ至る前に冷媒とホツトガス間で熱交
換がなされ、氷点よりも適宜高い温度となつた冷
媒が空気熱交換器４ａ，４ｂへ供給され、この冷
媒によつて空気熱交換器４ａ，４ｂのデフロスト
を行わしめる。 Therefore, the hot gas supplied from the defrost line and the refrigerant that has been reduced in pressure and reduced in temperature pass through the distributor at the same time, allowing heat exchange between the refrigerant and the hot gas before reaching the air heat exchangers 4a and 4b. The refrigerant whose temperature is appropriately higher than the freezing point is supplied to the air heat exchangers 4a and 4b, and the air heat exchangers 4a and 4b are defrosted by this refrigerant.
なお、デフロスト運転時および暖房運転時には
送風機２２を停止させる。 Note that the blower 22 is stopped during defrosting operation and heating operation.
以上説明したように、本発明に係るヒートポン
プによれば、水熱交換器内で水と熱交換すること
によつて凝縮した液冷媒とデフロスト用のホツト
ガスとを同時に減圧器へ供給することにより、減
圧量の極めて小なるホツトガスと、減圧によつて
低温化した冷媒との間で熱交換せしめ、氷点より
も高い一定温度の均一な冷媒となし、この冷媒を
空気熱交換器へ供給することによつて空気熱交換
器の除霜を行うものである。 As explained above, according to the heat pump according to the present invention, by simultaneously supplying the liquid refrigerant condensed by exchanging heat with water in the water heat exchanger and the hot gas for defrosting to the pressure reducer, By exchanging heat between the hot gas, which has an extremely small amount of pressure reduction, and the refrigerant, which has been lowered in temperature by reducing the pressure, it becomes a uniform refrigerant with a constant temperature higher than the freezing point, and this refrigerant is supplied to the air heat exchanger. Therefore, it defrosts the air heat exchanger.
したがつて、暖房運転を中止することなく空気
熱交換器のデフロストを行うことにより、デフロ
スト時の暖房運転能力低下を可及的小ならしめ得
る。 Therefore, by defrosting the air heat exchanger without stopping the heating operation, it is possible to minimize the decrease in heating operation performance during defrosting.
さらに、ホツトガス状態の冷媒と低温の冷媒と
を減圧器内で熱交換せしめることによつて得られ
るほぼ均一な温度の冷媒を空気冷却器の除霜に用
いるので、ホツトガス状態の冷媒と低温の冷媒と
を直接空気熱交換器へ供給する場合のごとく、熱
交換器上流側コイル内でホツトガスと低温冷媒と
の熱交換が盛んに行われるために、冷媒から熱交
換器コイルへの伝熱量が不十分となり、熱交換用
コイル最上流部における除霜効率が極度に低下す
ることはない。 Furthermore, since a refrigerant with a substantially uniform temperature obtained by exchanging heat between a hot gas refrigerant and a low-temperature refrigerant in a pressure reducer is used for defrosting the air cooler, the refrigerant in a hot gas state and a low-temperature refrigerant When gas is directly supplied to an air heat exchanger, heat exchange between the hot gas and the low-temperature refrigerant takes place in the upstream coil of the heat exchanger, so the amount of heat transferred from the refrigerant to the heat exchanger coil is insufficient. This is sufficient, and the defrosting efficiency at the most upstream portion of the heat exchange coil will not be extremely reduced.
なお、前記実施例においては空気熱交換器を２
基設け、暖房運転時の減圧器として分配器を用い
るものとしたが、これらに限定されるものではな
い。 In addition, in the above embodiment, two air heat exchangers were used.
Although a distributor is used as a pressure reducer during base installation and heating operation, the present invention is not limited to these.
また、暖房時用ライン１５に設けた電磁弁V2
は必ずしも必要ではなく、分岐ライン１７ａ，１
７ｂそれぞれに設けた電磁弁V4によつて各空気
熱交換器への冷媒流路を制御することも可能であ
る。 In addition, a solenoid valve V 2 installed in the heating line 15
is not necessarily necessary, and branch lines 17a, 1
It is also possible to control the refrigerant flow path to each air heat exchanger by a solenoid valve V4 provided in each of the air heat exchangers 7b.
図は本発明に係るヒートポンプの一例を示すも
ので、第１図は冷房運転時の冷媒の流れを示し、
第２図は暖房運転、または暖房運転とデフロスト
運転時の冷媒の流れを示す。
図中、１……圧縮機、２……４方切換弁、３…
…ライン、３ａ，３ｂ……分岐ライン、４ａ，４
ｂ……空気熱交換器、５ａ，５ｂ……過冷却コイ
ル、６……合流ライン、７……ドライヤストレー
ナ、８……水熱交換器、９……伝熱管、１０……
ライン、１１……ライン、１２……アキユムレー
タ、１３……バイパスライン、１４……逆止弁、
１５……暖房時用ライン、１６……ドライヤスト
レーナ、１７ａ，１７ｂ……分岐ライン、１８
ａ，１８ｂ……分配器、１９……デフロストライ
ン、２０ａ，２０ｂ……分岐デフロストライン、
２１……空調器、V1……操作弁、V2……電磁弁、
DV……デフロスト弁、EV……膨張弁。
The figure shows an example of the heat pump according to the present invention, and Fig. 1 shows the flow of refrigerant during cooling operation,
FIG. 2 shows the flow of refrigerant during heating operation, or heating operation and defrost operation. In the figure, 1...compressor, 2...4-way switching valve, 3...
...Line, 3a, 3b... Branch line, 4a, 4
b... Air heat exchanger, 5a, 5b... Supercooling coil, 6... Merging line, 7... Dryer strainer, 8... Water heat exchanger, 9... Heat transfer tube, 10...
Line, 11...Line, 12...Accumulator, 13...Bypass line, 14...Check valve,
15... Heating line, 16... Dryer strainer, 17a, 17b... Branch line, 18
a, 18b...distributor, 19...defrost line, 20a, 20b...branch defrost line,
21... Air conditioner, V 1 ... Operating valve, V 2 ... Solenoid valve,
DV...defrost valve, EV...expansion valve.
Claims (1)
運転切換用の４方切換弁を経て空気熱交換器に送
り込まれ、同空気熱交換器からの冷媒は操作弁、
膨張弁を経て水熱交換器内の伝熱管へ送り込まれ
て、同伝熱管を通つた冷媒は前記４方切換弁を経
て圧縮機に吸入され、暖房運転時には、圧縮機か
らのホツトガス冷媒は暖房運転に切り換えられた
前記４方切換弁を経て前記水熱交換器内の伝熱管
へ冷房運転時とは反対側から送り込まれ、同伝熱
管を通つた冷媒は、前記膨張弁の２次側から分岐
して前記操作弁に接続され、しかも暖房運転時に
は開となる弁を備えるバイパスラインを経て冷房
運転時における前記空気熱交換器からの冷媒戻り
ラインを逆流し、かつこのラインから分れ、しか
も暖房時には開く電磁弁を有する暖房時用ライン
及び減圧器を経て前記空気熱交換器へ冷房運転時
とは反対側から送り込まれ、同熱交換器からの冷
媒は前記４方切換弁を経て再び圧縮機に吸入され
るヒートポンプにおいて、前記圧縮機より４方切
換弁に至る高圧ラインからデフロストラインを分
岐せしめて、このデフロストラインを暖房運転時
における前記空気熱交換器への冷媒供給部たる減
圧器へ接続し、かつ同デフロストラインにデフロ
スト運転時に開となるデフロスト弁を設けたこと
を特徴とするヒートポンプ。1 During cooling operation, the refrigerant from the compressor is sent to the air heat exchanger via the four-way switching valve for switching between cooling and heating operation, and the refrigerant from the air heat exchanger is sent to the operating valve,
The refrigerant is sent to the heat transfer tube in the water heat exchanger via the expansion valve, and the refrigerant that passes through the heat transfer tube is sucked into the compressor via the four-way switching valve. During heating operation, the hot gas refrigerant from the compressor is used for heating. The refrigerant is fed into the heat transfer tube in the water heat exchanger from the side opposite to that during cooling operation through the four-way switching valve that has been switched into operation, and the refrigerant that has passed through the heat transfer tube is transferred from the secondary side of the expansion valve. A refrigerant return line from the air heat exchanger during cooling operation is reversely flowed through a bypass line that is branched and connected to the operation valve and is further provided with a valve that is opened during heating operation, and is separated from this line. During heating, the refrigerant is fed into the air heat exchanger from the side opposite to that during cooling operation through a heating line with a solenoid valve that opens and a pressure reducer, and the refrigerant from the heat exchanger is compressed again through the four-way switching valve. In the heat pump that is sucked into the heat pump, a defrost line is branched from the high pressure line leading from the compressor to the four-way switching valve, and this defrost line is connected to a pressure reducer that is a refrigerant supply part to the air heat exchanger during heating operation. A heat pump characterized in that the heat pump is connected to the defrost line and is provided with a defrost valve that opens during defrost operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18465883A JPS6078261A (en) | 1983-10-01 | 1983-10-01 | Heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18465883A JPS6078261A (en) | 1983-10-01 | 1983-10-01 | Heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6078261A JPS6078261A (en) | 1985-05-02 |
| JPH0239716B2 true JPH0239716B2 (en) | 1990-09-06 |
Family
ID=16157082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18465883A Granted JPS6078261A (en) | 1983-10-01 | 1983-10-01 | Heat pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6078261A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5783371U (en) * | 1980-11-12 | 1982-05-22 |
-
1983
- 1983-10-01 JP JP18465883A patent/JPS6078261A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6078261A (en) | 1985-05-02 |
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