JPH0311660Y2 - - Google Patents
Info
- Publication number
- JPH0311660Y2 JPH0311660Y2 JP17024682U JP17024682U JPH0311660Y2 JP H0311660 Y2 JPH0311660 Y2 JP H0311660Y2 JP 17024682 U JP17024682 U JP 17024682U JP 17024682 U JP17024682 U JP 17024682U JP H0311660 Y2 JPH0311660 Y2 JP H0311660Y2
- Authority
- JP
- Japan
- Prior art keywords
- thermostat
- evaporator
- refrigerator
- defrosting
- valve
- 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
Links
- 238000010257 thawing Methods 0.000 claims description 28
- 238000005057 refrigeration Methods 0.000 claims description 27
- 239000003507 refrigerant Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Defrosting Systems (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は２温度式冷蔵庫に使用する冷凍装置に
おける除霜後の圧縮機の起動改良に関する。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in starting up a compressor after defrosting in a refrigeration system used in a two-temperature refrigerator.
従来例の構成とその問題点
一般に２温度式の冷蔵庫における冷凍装置は第
１図に示す通りである。１は圧縮機、２は凝縮
器、３は第１毛細管、４は冷蔵室内を冷却するた
めの冷蔵室用蒸発器、５は冷凍室内を冷却するた
めの冷凍室用蒸発器であり、凝縮器２と第１毛細
管３の間に第１開閉弁７（以下電磁弁という）を
接続して第１冷凍回路６を構成している。また８
は第２毛細管であり、この第２毛細管８は上記凝
縮器２と第１開閉弁７との間と上記冷蔵室用蒸発
器４と冷凍室用蒸発器５との間に設けられてお
り、かつ、第２毛細管８の出口部には第２開閉弁
９（以下第２電磁弁という）が設けられている。
すなわち、上記圧縮機１、凝縮器２、第２毛細管
８、第２電磁弁９、冷凍室用蒸発器５によつて第
２冷凍回路１０を構成している。そして、上記第
１の冷凍回路６および第２冷凍回路１０は、凝縮
器２と第１毛細管３との間に設けた第１電磁弁７
と第２毛細管８の出口部に設けた第２電磁弁９に
よつて選択的に切替えるように構成している。な
お、通常は第１電磁弁７は開放、第２電磁弁は閉
成して、第１冷凍回路６を構成し、第１電磁弁７
を閉成、第２電磁弁９を開放すると第２冷凍回路
１０に切替わるものである。Conventional Structure and Problems Generally, a refrigeration system in a two-temperature refrigerator is as shown in FIG. 1 is a compressor, 2 is a condenser, 3 is a first capillary tube, 4 is a refrigerator compartment evaporator for cooling the inside of the refrigerator compartment, 5 is a freezer compartment evaporator for cooling the freezer compartment; A first on-off valve 7 (hereinafter referred to as an electromagnetic valve) is connected between the first capillary tube 2 and the first capillary tube 3 to form a first refrigeration circuit 6. 8 again
is a second capillary tube, and this second capillary tube 8 is provided between the condenser 2 and the first on-off valve 7 and between the refrigerator compartment evaporator 4 and the freezer compartment evaporator 5, Further, a second on-off valve 9 (hereinafter referred to as a second solenoid valve) is provided at the outlet portion of the second capillary tube 8.
That is, the compressor 1, condenser 2, second capillary tube 8, second electromagnetic valve 9, and freezer compartment evaporator 5 constitute a second refrigeration circuit 10. The first refrigeration circuit 6 and the second refrigeration circuit 10 each include a first solenoid valve 7 provided between the condenser 2 and the first capillary tube 3.
and a second electromagnetic valve 9 provided at the outlet of the second capillary tube 8. Note that normally the first solenoid valve 7 is open and the second solenoid valve is closed to constitute the first refrigeration circuit 6.
When the second solenoid valve 9 is closed and the second solenoid valve 9 is opened, the circuit is switched to the second refrigeration circuit 10.
そして、このような装置の制御回路として従来
例は第２図に示す通りである。すなわち、冷凍室
温度を検知するサーモスタツトＡにより制御され
る圧縮機１と、冷蔵室サーモスタツトＢにより制
御される電磁弁７により、通常時は実線矢印の如
く冷媒を冷蔵室用蒸発器４を介して冷凍室用蒸発
器５に供給してこれらを同時に冷却し、また、冷
蔵室が設定温度以下になつた時には電磁弁９を開
け、電磁弁７を閉じ点線矢印の如く冷媒を冷凍室
用蒸発器５のみ供給するようにしている。したが
つて、第２図のような電気回路では、第１図のサ
ーモスタツトＡを開き圧縮機１の運転をとめて冷
凍室蒸発器５の除霜時には、電磁弁７又は電磁弁
９のどちらかが常に開いており、冷却運転停止後
の凝縮器２の高温高圧冷媒が冷凍室用蒸発器５に
流入し、除霜後の冷凍装置内の圧力を上昇させ圧
縮機１の起動がしにくくなる問題があつた。 A conventional example of a control circuit for such a device is shown in FIG. That is, under normal conditions, the compressor 1 is controlled by a thermostat A that detects the temperature of the freezer compartment, and the solenoid valve 7 is controlled by the refrigerator thermostat B. The refrigerant is supplied to the evaporator 5 for the freezer compartment through the evaporator 5 to cool them simultaneously. Also, when the temperature in the refrigerator compartment falls below the set temperature, the solenoid valve 9 is opened and the solenoid valve 7 is closed to supply the refrigerant to the freezer compartment as indicated by the dotted arrow. Only the evaporator 5 is supplied. Therefore, in the electric circuit shown in FIG. 2, when the thermostat A shown in FIG. is always open, and the high-temperature, high-pressure refrigerant in the condenser 2 flows into the freezer compartment evaporator 5 after the cooling operation has stopped, increasing the pressure inside the refrigeration system after defrosting and making it difficult to start the compressor 1. A problem arose.
考案の目的
本考案は冷凍室用蒸発器の除霜時における冷凍
装置の圧力の上昇を少なくし、除霜後の圧縮機の
起動を容易にさせることにある。Purpose of the invention The purpose of the invention is to reduce the rise in pressure of the refrigeration system during defrosting of the evaporator for a freezer compartment, and to facilitate the start-up of the compressor after defrosting.
考案の構成
この目的を達成する為に本考案の冷蔵庫は冷凍
室用サーモスタツトの開閉で運転、停止の制御を
される圧縮機と、凝縮器と、冷蔵室用サーモスタ
ツトの開閉にて制御される第１開閉弁と、第１毛
細管と、冷蔵室用蒸発器と、冷凍室用蒸発器とを
備えた第１冷凍回路と、前記凝縮器と第１開閉弁
との間より分岐された第２手細管と、冷蔵室用サ
ーモスタツトの開閉にて制御される第２開閉弁と
を備えて前記冷蔵室用蒸発器と冷凍室用蒸発器と
の間に合流する第２冷凍回路と、前記冷凍室用蒸
発器の近傍に設けられた除霜用のヒータと、前記
圧縮機の運転時間を冷凍室用サーモスタツトによ
り積算して一定時間がきたら圧縮機とヒータとを
切替える除霜用タイマーとからなり、前記除霜用
タイマーは、前記冷蔵室用サーモスタツトへの電
源の供給を開閉する可動接点と、この可動接点の
開閉より遅延して前記圧縮機とヒータへの電源の
供給を切替える可動接点とを備え、圧縮機の運転
中に前記第１開閉弁と第２開閉弁を閉成させ一定
時間後両可動接点を除霜前の状態に切替えてなる
ことを特徴とするものである。Structure of the invention In order to achieve this objective, the refrigerator of the invention has a compressor and a condenser whose operation and stop are controlled by opening and closing of the thermostat for the freezer compartment, and a condenser that is controlled by opening and closing of the thermostat for the refrigerator compartment. a first refrigeration circuit including a first on-off valve, a first capillary, a refrigerator compartment evaporator, and a freezer compartment evaporator; a second refrigeration circuit that includes a two-handed thin tube and a second on-off valve that is controlled by opening and closing of a refrigerator thermostat and joins between the refrigerator compartment evaporator and the freezer compartment evaporator; A defrosting heater installed near the evaporator for the freezer compartment, and a defrosting timer that integrates the operating time of the compressor using a freezer compartment thermostat and switches between the compressor and the heater when a certain period of time has elapsed. The defrosting timer includes a movable contact that opens and closes the supply of power to the refrigerator room thermostat, and a movable contact that switches the supply of power to the compressor and heater with a delay from the opening and closing of the movable contact. The first on-off valve and the second on-off valve are closed during operation of the compressor, and after a certain period of time, both movable contacts are switched to the state before defrosting.
実施例の説明
以下本考案の一実施例を第３図にしたがい説明
する。なお、冷凍装置の回路は第１図と同じなの
で説明を省略するが、第３図に示す本考案の制御
回路によつて、冷凍室用蒸発器５の除霜中および
除霜数分前は、第１電磁弁７および第２電磁弁９
はともに閉成して各冷凍回路を遮断している。す
なわち、１１は冷蔵室内の温度を感知して作動す
る冷蔵室用サーモスタツトであり、可動接点１１
ａ、冷蔵室内の温度が設定以上になつたとき上記
可動接点１１ａが閉成する第１固定接点１１ｂ、
冷蔵室内の温度が設定以下になつたとき上記可動
接点１１ａが閉成する第２固定接点１１ｃを備え
ている。この冷蔵室用の可動接点１１ａは冷凍室
用蒸発器５の除霜用タイマ１２の固定接点１２ｂ
に接続され、可動接点１２ａは通常前記固定接点
１２ｂを閉成している。可動接点１２ａは冷凍室
蒸発器５の除霜数分前より除霜中開いている。ま
た、可動接点１２ａは交流電源１３の一端に接続
されている。上記冷蔵室用サーモスタツト１１の
第１固定接点１１ｂは第１冷凍回路６を構成する
第１電磁弁７を介して上記電源１３の他端に接続
されている。さらに上記冷蔵室用サーモスタツト
１１の第２固定接点１１ｃは第２冷凍回路１０を
構成する第２電磁弁９を介して上記電源１３の他
端に接続されている。そして、両電磁弁７，９は
共に電源１３が供給されているとき開成するもの
である。１ａは圧縮機駆動用のモータで、冷凍室
用サーモスタツト１４でON−OFF制御されてい
る。冷凍室用サーモスタツトの可動接点１４ａは
交流電源１３の一端に接続されている。固定接点
１４ｂはタイマー１２の可動接点１２ｃに接続さ
れており、通常冷却時可動接点１２ｃは固定接点
１２ｄに接続されている。また、タイマー１２は
圧縮機のモータ１ａの運転時間を積算して、ある
時間がくると除霜のため可動接点１２ａ，１２ｃ
を切り替える。冷凍室用蒸発器５の除霜時は可動
接点１２ｃは固定接点１２ｅに接続される。そし
て、固定接点１２ｅは冷凍室用蒸発器５のヒータ
１５に接続されている。冷凍室用蒸発器ヒータ１
５の他端は交流電源１３の他端に接続されてい
る。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The circuit of the refrigeration system is the same as that shown in Fig. 1, so its explanation will be omitted. However, by the control circuit of the present invention shown in Fig. 3, during defrosting of the evaporator 5 for the freezer compartment and several minutes before defrosting, , the first solenoid valve 7 and the second solenoid valve 9
Both are closed to cut off each refrigeration circuit. That is, 11 is a thermostat for the refrigerator compartment that operates by sensing the temperature inside the refrigerator compartment, and the movable contact 11
a, a first fixed contact 11b that the movable contact 11a closes when the temperature in the refrigerator room exceeds a set value;
The movable contact 11a is provided with a second fixed contact 11c that closes when the temperature in the refrigerator compartment falls below a set temperature. The movable contact 11a for the refrigerator compartment is the fixed contact 12b of the defrosting timer 12 of the evaporator 5 for the freezer compartment.
The movable contact 12a normally closes the fixed contact 12b. The movable contact 12a is opened several minutes before the defrosting of the freezer compartment evaporator 5 during defrosting. Further, the movable contact 12a is connected to one end of the AC power source 13. The first fixed contact 11b of the refrigerator thermostat 11 is connected to the other end of the power source 13 via a first solenoid valve 7 constituting the first refrigeration circuit 6. Further, the second fixed contact 11c of the refrigerating room thermostat 11 is connected to the other end of the power source 13 via a second solenoid valve 9 constituting the second refrigeration circuit 10. Both electromagnetic valves 7 and 9 are opened when power 13 is supplied. Reference numeral 1a denotes a motor for driving the compressor, which is ON-OFF controlled by a thermostat 14 for the freezer compartment. A movable contact 14a of the freezer thermostat is connected to one end of an AC power source 13. The fixed contact 14b is connected to the movable contact 12c of the timer 12, and the movable contact 12c during normal cooling is connected to the fixed contact 12d. Also, the timer 12 integrates the operating time of the compressor motor 1a, and when a certain time elapses, the movable contacts 12a, 12c are activated for defrosting.
Switch. When defrosting the freezer compartment evaporator 5, the movable contact 12c is connected to the fixed contact 12e. The fixed contact 12e is connected to the heater 15 of the evaporator 5 for the freezer compartment. Evaporator heater 1 for freezer compartment
The other end of 5 is connected to the other end of AC power supply 13 .
この様な構成において動作を説明する。冷凍室
用サーモスタツト１４が閉じ、除霜用タイマ１２
がモータ１ａに通電をし、冷蔵庫の冷却運転時
で、冷蔵室が設定温度以上の時は第１電磁弁７が
通電して開き、第２開閉弁９が閉じ第１図の実線
矢印の如く冷媒が第１冷凍回路６に流れている。 The operation in such a configuration will be explained. Freezer thermostat 14 closes, defrost timer 12
energizes the motor 1a, and when the refrigerator is in cooling operation and the temperature of the refrigerator compartment is higher than the set temperature, the first solenoid valve 7 is energized and opens, and the second on-off valve 9 is closed as shown by the solid line arrow in FIG. Refrigerant is flowing into the first refrigeration circuit 6.
また、可動接点１１ａが切り替わり、冷蔵室が
設定温度以下の時は冷蔵室用サーモスタツト１１
の第２開閉弁９が通電されて開き、第１開閉弁７
が閉じ、冷蔵室用蒸発器４をバイパスして第２冷
凍回路１０に点線矢印の如く冷媒が流れる。 In addition, the movable contact 11a switches, and when the temperature of the refrigerator compartment is below the set temperature, the thermostat 11 for the refrigerator compartment is switched.
The second on-off valve 9 is energized and opens, and the first on-off valve 7
is closed, and the refrigerant bypasses the refrigerator compartment evaporator 4 and flows into the second refrigeration circuit 10 as indicated by the dotted arrow.
そして、圧縮機のモータ１ａの運転がタイマ１
２より積算され除霜数分前になると除霜タイマー
１２の可動接点１２ａが開き、第１電磁弁７また
は第２電磁弁９への冷蔵室用サーモスタツト１１
による電源の供給がたたれて両弁７，９を閉成に
し、第１，第２冷凍回路の高低圧を遮断してポン
プ運転を行なつて冷媒を凝縮器２に集める。この
結果、圧縮室内と吸入管内とは、ごく低い圧力の
雰囲気となる。したがつて、除霜後の圧縮機１の
再起動時において圧縮機１のピストンは、ごく低
い圧力の冷媒ガスを圧縮することとなる。よつ
て、再起動時の初期には大きなトルクを必要とす
ることがないので、圧縮機１の起動性が良くな
る。その後、可動接点１２ｃが切替つてヒータ１
５を通電して除霜を開始させる。尚ポンプ運転は
可動接点１２ｃが切替わるときまでであるか、凝
縮器２内を高圧とするものである。そして、時間
がさらにたつと、タイマー１２の可動接点１２
ａ，１２ｂはともにもとの状態に切替えられるも
のである。したがつて圧縮機１の再起動時に、吐
出管内の高圧の雰囲気の冷媒は、凝縮器２を通つ
て第１または第２の冷凍回路に逃げるので、上記
のように圧縮機１の初期の起動性の良い状態か
ら、通常の運転状態となる。 Then, the operation of the compressor motor 1a is started by timer 1.
2, when it is several minutes before defrosting, the movable contact 12a of the defrost timer 12 opens, and the thermostat 11 for the refrigerator compartment is connected to the first solenoid valve 7 or the second solenoid valve 9.
When the power supply is stopped, both valves 7 and 9 are closed, high and low pressures of the first and second refrigeration circuits are cut off, and the pump is operated to collect refrigerant into the condenser 2. As a result, the compression chamber and the suction pipe have an extremely low pressure atmosphere. Therefore, when the compressor 1 is restarted after defrosting, the piston of the compressor 1 compresses refrigerant gas at a very low pressure. Therefore, since a large torque is not required at the initial stage of restart, the startability of the compressor 1 is improved. After that, the movable contact 12c switches and the heater 1
5 to start defrosting. The pump is operated until the movable contact 12c is switched, or the pressure inside the condenser 2 is kept high. Then, as time passes further, the movable contact 12 of the timer 12
Both a and 12b can be switched back to their original states. Therefore, when the compressor 1 is restarted, the refrigerant in the high-pressure atmosphere in the discharge pipe escapes to the first or second refrigeration circuit through the condenser 2, so that the initial startup of the compressor 1 is prevented as described above. The condition changes from a normal condition to a normal driving condition.
考案の効果
本考案は冷凍室用蒸発器の除霜用ヒータの動作
前に、第１開閉弁と第２開閉弁を除霜用タイマー
にて閉成させるので、一定時間ポンプダウン運転
をすることとなり、凝縮器内を高圧に冷凍室用蒸
発器を低圧に高低圧差をつけて除霜するので、除
霜終了後の運転が容易に行なえるものである。Effects of the invention In this invention, the first on-off valve and the second on-off valve are closed by the defrost timer before the defrosting heater of the freezer compartment evaporator is activated, so the pump is not operated for a certain period of time. Since defrosting is performed by setting the inside of the condenser at high pressure and the evaporator for the freezer compartment at low pressure with a difference between high and low pressures, operation after defrosting is easily performed.
第１図は２温度式冷蔵庫における冷凍システム
図、第２図は同冷凍システムにおける従来例の電
気回路図、第３図は同冷凍システムにおける本考
案の一実施例の電気回路図である。
１……圧縮機、２……凝縮器、３……第１毛細
管、４……冷蔵室用蒸発器、５……冷凍室用蒸発
器、６……第１冷凍回路、７……第１開閉弁、８
……第２毛細管、９……第２開閉弁、１０……第
２冷凍回路、１１……冷蔵室用サーモスタツト、
１２……除霜用タイマー、１４……冷凍室用サー
モスタツト。
FIG. 1 is a diagram of a refrigeration system in a two-temperature refrigerator, FIG. 2 is an electrical circuit diagram of a conventional example of the refrigeration system, and FIG. 3 is an electrical circuit diagram of an embodiment of the present invention in the refrigeration system. 1... Compressor, 2... Condenser, 3... First capillary, 4... Evaporator for refrigerator compartment, 5... Evaporator for freezer compartment, 6... First refrigeration circuit, 7... First On-off valve, 8
...Second capillary tube, 9...Second on-off valve, 10...Second refrigeration circuit, 11...Refrigerating room thermostat,
12...Defrosting timer, 14...Thermostat for the freezer compartment.
Claims (1)
制御をされる圧縮機と、凝縮器と、冷蔵室用サー
モスタツトの開閉にて制御される第１開閉弁と、
第１毛細管と、冷蔵室用蒸発器と、冷凍室用蒸発
器とを備えた第１冷凍回路と、前記凝縮器と第１
開閉弁との間より分岐された第２手細管と、冷蔵
室用サーモスタツトの開閉にて制御される第２開
閉弁とを備えて前記冷蔵室用蒸発器と冷凍室用蒸
発器との間に合流する第２冷凍回路と、前記冷凍
室用蒸発器の近傍に設けられた除霜用のヒータ
と、前記圧縮機の運転時間を冷凍室用サーモスタ
ツトにより積算して一定時間がきたら圧縮機とヒ
ータとを切替える除霜用タイマーとからなり、前
記除霜用タイマーは、前記冷蔵室用サーモスタツ
トへの電源の供給を開閉する可動接点と、この可
動接点の開閉より遅延して前記圧縮機とヒータへ
の電源の供給を切替える可動接点とを備え、圧縮
機の運転中に前記第１開閉弁と第２開閉弁を閉成
させ一定時間後両可動接点を除霜前の状態に切替
えてなることを特徴とする冷蔵庫。 A compressor whose operation and stop are controlled by opening and closing a freezer thermostat, a condenser, and a first on-off valve which is controlled by opening and closing a refrigerator thermostat.
a first refrigeration circuit including a first capillary, an evaporator for a refrigerator compartment, and an evaporator for a freezer compartment;
between the refrigerator compartment evaporator and the freezer compartment evaporator, comprising a second hand tube branched from the opening/closing valve, and a second opening/closing valve controlled by opening and closing of the refrigerator compartment thermostat; a second refrigeration circuit that joins the evaporator, a defrosting heater installed near the evaporator for the freezer compartment, and a thermostat for the freezer compartment to integrate the operation time of the compressor, and then turn the compressor on after a certain period of time has elapsed. The defrosting timer includes a movable contact that opens and closes the supply of power to the refrigerator compartment thermostat, and a defrosting timer that switches the supply of power to the refrigerator room thermostat, and a defrosting timer that switches the supply of power to the refrigerator room thermostat, and a defrosting timer that switches the supply of power to the refrigerator room thermostat. and a movable contact for switching the supply of power to the heater, the first on-off valve and the second on-off valve are closed during operation of the compressor, and after a certain period of time, both movable contacts are switched to the state before defrosting. A refrigerator characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17024682U JPS5975670U (en) | 1982-11-10 | 1982-11-10 | refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17024682U JPS5975670U (en) | 1982-11-10 | 1982-11-10 | refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5975670U JPS5975670U (en) | 1984-05-22 |
| JPH0311660Y2 true JPH0311660Y2 (en) | 1991-03-20 |
Family
ID=30371707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17024682U Granted JPS5975670U (en) | 1982-11-10 | 1982-11-10 | refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5975670U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100638103B1 (en) * | 2002-11-06 | 2006-10-25 | 삼성전자주식회사 | Cooling apparatus |
| JP5140398B2 (en) * | 2007-11-30 | 2013-02-06 | 三洋電機株式会社 | Refrigeration equipment |
| JP5150225B2 (en) * | 2007-11-30 | 2013-02-20 | 三洋電機株式会社 | Heat pump system |
-
1982
- 1982-11-10 JP JP17024682U patent/JPS5975670U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5975670U (en) | 1984-05-22 |
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