KR900010730Y1 - Circuit for defrostin of refrigerator - Google Patents

Circuit for defrostin of refrigerator Download PDF

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Publication number
KR900010730Y1
KR900010730Y1 KR2019870020095U KR870020095U KR900010730Y1 KR 900010730 Y1 KR900010730 Y1 KR 900010730Y1 KR 2019870020095 U KR2019870020095 U KR 2019870020095U KR 870020095 U KR870020095 U KR 870020095U KR 900010730 Y1 KR900010730 Y1 KR 900010730Y1
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South Korea
Prior art keywords
relay
compressor
contact
defrost
low pressure
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KR2019870020095U
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Korean (ko)
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KR890011182U (en
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최규명
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금성전선 주식회사
문박
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Priority to KR2019870020095U priority Critical patent/KR900010730Y1/en
Publication of KR890011182U publication Critical patent/KR890011182U/en
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Publication of KR900010730Y1 publication Critical patent/KR900010730Y1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/006—Defroster control with electronic control circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/008—Defroster control by timer

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Defrosting Systems (AREA)

Abstract

내용 없음.No content.

Description

냉동기의 제상에 따른 저압상승 방지 및 제상발정 방지회로Low pressure rise prevention and defrost heat prevention circuit according to the defrost of the refrigerator

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

제2a, b도는 종래의 회로도.2a and b are conventional circuit diagrams.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

RY1-RY3: 릴레이 SOL1: 액 전자변RY 1 -RY 3 : Relay SOL 1 : Liquid electronic valve

SW1: 저압 압력스위치 SW2: 고내온도조절스위치SW 1 : Low pressure switch SW 2 : High temperature control switch

TH1: 제상타이머 RY2a, RY3a: 릴레이(RY2, RY3)의 a접점TH 1 : Defrost timer RY 2a , RY 3a : Relay a contact of relay (RY 2 , RY 3 )

RY2b: 릴레이(RY2)의 b접점 TH1a, TH1b: 타이머(TH1)의 a, b접점RY 2b : b contact of relay (RY 2 ) TH 1a , TH 1b : a, b contact of timer (TH 1 )

본 고안은 냉동기의 히타제상 방식에 있어서 냉각 코일에 발생된 성에를 제상할시 냉동기의 펌프다운 기능에 의해 저압부측에 냉매가 제거된 상태에서 제상히타를 가열시키도록 함으로서 잔류냉매의 과열로 인한 저압상승 요인을 제거하여 압축기의 과부하를 방지하고 또한 제상운전 중에는 압축기가 기동하지 않도록하여 압축기의 발정을 방지하는 제어회로에 관한 것이다.In the present invention, in the heater defrosting method of the refrigerator, when defrosting the frost generated in the cooling coil, the defrost heater is heated in the state where the refrigerant is removed at the low pressure side by the pump-down function of the refrigerator. The present invention relates to a control circuit that prevents the compressor from overloading by eliminating the rising factor and preventing the compressor from starting during the defrosting operation.

일반적으로 냉동기의 사이클 과정은 압축기에서 응축된 고압의 냉매가 냉각 코일을 통과함으로서 저온, 저압의 냉매로 변화됨과 동시에 주위 온도를 낮추게 되는데 이때 냉각코일의 주위에는 기압 및 온도차이로 인한 성에가 발생되어진다.In general, the cycle of the refrigerator is converted into a low-temperature and low-pressure refrigerant by the high-pressure refrigerant condensed in the compressor to pass through the cooling coil and at the same time lowering the ambient temperature. At this time, frost due to air pressure and temperature difference is generated around the cooling coil Lose.

이러한 성에의 발생이 장시간 지속되어지면 냉동실의 기능이 저하되는 결과를 낳게된다. 따라서 종래에는 제2a,b도와 같은 제상회로에 의해 성에를 제거시키는 방법을 사용하였다.If such frost occurs for a long time, the function of the freezer compartment is reduced. Therefore, in the related art, a method of removing frost by a defrost circuit such as 2a and b is used.

이에 첨부한 도면 제2a도에 의거하여 종래의 작용효과를 살펴보면, 제상타이머(TH11)에 셋팅된 제상시간에 의하여 제상동작이 되면, 액 전자변(SOL11)이 닫힘과 동시에 릴레이(RY12)가 부동작 함으로서 공지의 압축기가 정지되어진다. 이때 제상타이머(TH11)의 접점(TH11b)에 의해 릴레이(RY11)가 동작하면 제상히타(도시생략)가 가열되어 제상동작을 하게된다.Referring to FIG. 2a of the accompanying drawings, the conventional operation and effect are described. When the defrosting operation is performed by the defrost time set in the defrost timer TH 11 , the electromagnetic valve SOL 11 is closed and the relay RY 12 is simultaneously closed. By inoperating, the known compressor is stopped. At this time, when the relay RY 11 is operated by the contact TH 11b of the defrost timer TH 11 , the defrost heater (not shown) is heated to perform the defrosting operation.

이와같이 제상동작이 이루어질 때 냉동운전중 저압부측에 유동하던 냉매가 잔존하고 있는 상태에서 열을 가하게 됨으로 그 잔존의 냉매가 가열되어져 저압이 상승되는 결과를 가져오게 된다.Thus, when the defrosting operation is performed, heat is applied in a state in which the refrigerant flowing in the low pressure portion during the freezing operation remains, resulting in the low pressure being raised by heating the remaining refrigerant.

따라서 제상동작이 끝난후 초기 냉동운전시 냉각 코일내에서 상승된 잔존 냉매에 의하여 압축기에 과부하가 걸리는 단점이 있었다.Therefore, after the defrosting operation, there was a disadvantage in that the compressor is overloaded by the residual refrigerant that is raised in the cooling coil during the initial freezing operation.

또한 제2b도는 다른 실시예로서, 제상동작중에 액전자변(SOL21)이 누설이 되어질 경우에는 저압측의 압력상승으로 인해 공지의 압축기가 발정이 일어나 제상동작이 이루어지지 않는 결점이 있는 것이다.In addition, Figure 2b is another embodiment, when the liquid-electron valve (SOL 21 ) is leaked during the defrosting operation, there is a drawback that the known compressor is heat-established due to the pressure rise on the low pressure side, the defrosting operation is not performed.

이에 본 고안은 종래의 히타제상 제어회로에서의 결점인 제상동작시 저압부에 냉매가스가 잔존하는 현상을 제거하므로서 잔류냉매 과열로 인한 압축기의 과부하를 방지하는데 목적이 있으며, 또 다른 목적은 냉각코일에 발생된 성애를 제상중 저압 상승으로 인한 압축기의 발정을 방지하여 완전히 제상동작이 실현되도록 하는 제상 회로를 제공하는데 있다.Therefore, the present invention aims to prevent the overload of the compressor due to residual refrigerant overheating by eliminating the phenomenon of refrigerant gas remaining in the low pressure part during the defrosting operation, which is a drawback in the conventional heater defrost control circuit, and another object thereof is a cooling coil. It is to provide a defrost circuit that prevents the estrus of the compressor due to the low pressure rise during the defrost generated in the defrost so that the defrosting operation is fully realized.

이를 첨부된 도면 제1도에 의거 보다 상세히 설명하면 다음과 같다.This will be described in more detail based on the accompanying drawings of FIG. 1 as follows.

저압 압력스위치(SW1)에 압축기용 기동릴레이(RY2)의 a접점(RY2a)과 보조릴레이(RY3)의 a접점(RY3a)을 병렬연결하여 압축기용 기동릴레이(Ry2)의 b접점(Ry2b)을 직렬 연결하여 타이머(TH1)의 b접점(TH1b)에 연결하되, 병렬연결되는 a접점(TH1a)에는 직렬 연결되는 고내온도 조절스위치(SW2)와 액전자변(SOL1)을 보조릴레이(RY3)에 병렬 연결하여 구성한다.A low-pressure pressure switch for a compressor start relay (RY 2) of a contact point (RY 2a) and the auxiliary relay a contact of the (RY 3) (RY 3a) parallel connected to a compressor start relay (Ry 2) to (SW 1) Connect the b contact (Ry 2b ) in series and connect it to the b contact (TH 1b ) of the timer (TH 1 ), but the parallel a contact (TH 1a ) connected in series with the high temperature control switch (SW 2 ) and the actuator It is configured by connecting (SOL 1 ) to the auxiliary relay (RY 3 ) in parallel.

이와같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention configured as described above are as follows.

냉동이 시작되고 제상타이머(TH1)가 동작을 하게되면 제상타이머(TH1)는 a접점(TH1a)으로 접속된 상태로 있게된다.When refrigeration starts and the defrost timer TH1 operates, the defrost timer TH 1 remains connected to the contact a TH 1a .

이때 제상타이머(TH1)의 셋팅시간(제상동작시간)이 되면 그 접점은 b접점(TH1b)으로 접속되어져 액전자변(SOL1)의 전자코일이 비여자되어 전자벽이 닫히므로, 고, 저압부가 분리차단되고 펌프다운이 된다.At this time, when the setting time (defrosting operation time) of the defrost timer TH 1 is reached, the contact point is connected to the b contact point TH 1b so that the electromagnetic coil of the liquid electron valve SOL 1 is not excited and the electron wall is closed. The low pressure section is disconnected and pumped down.

즉 액전자변(SOL1)이 닫히게 되면서 압축기에서 냉각 코일로 흐르던 고압의 냉매가 차단되어져, 그 냉각 코일내의 냉매는 저압으로 하강되어지는 반면에 압축기용 기동 릴레이(RY2)는 그 a접점(RY2a)에 의하여 자기 유지되는 상태이므로 보조릴레이(RY3)의 a접점(RY3a)이 오프되더라도 계속 동작하여 압축기를 기동시키고, 펌프다운 기능을 수행하여 냉각코일내의 잔존하는 저압의 냉매를 고압부측으로 흐르게한다.That is, as the liquid-electron valve SOL 1 is closed, the high-pressure refrigerant flowing from the compressor to the cooling coil is cut off, and the refrigerant in the cooling coil is lowered to low pressure, while the compressor starting relay RY 2 is connected to the a contact RY. 2a ), the self-holding state causes the compressor to continue to operate even when the a contact RY 3a of the auxiliary relay RY 3 is turned off, and performs a pump-down function to transfer the low-pressure refrigerant remaining in the cooling coil to the high pressure side. To flow.

또한 펌프다운 운전 동작은 압축기용 기동릴레이(RY2)의 b접점(RY2b)이 턴 오프된 상태이므로 제상릴레이(RY1)가 동작하지 않으므로 제상동작은 하지않게 된다.In addition, since the contact point RY 2b of the compressor starting relay RY 2 is turned off, the pump-down driving operation does not perform the defrosting operation because the defrosting relay RY 1 does not operate.

이와같이 펌프다운 동작이 계속되면서 냉각코일내의 저압부측 냉매의 냉매가 고압부측으로 흐르게 됨으로서 잔존냉매가 제거되고 그 압력이 더 하강하게 되어져 저압 압력스위치(SW1)의 설정 압력에 도달하게 되면 턴오프된다.As the pump-down operation continues as described above, the refrigerant of the low pressure part side refrigerant in the cooling coil flows to the high pressure part side, so that the remaining refrigerant is removed and the pressure is further lowered to turn off when the set pressure of the low pressure pressure switch SW 1 is reached.

저압 압력스위치(SW1)가 턴 오프됨에 따라 압축기용 기동 릴레이(RY2)가 부동작하게 되면서 압축기의 기동이 정지되고 그 b접점(RY2b)이 턴온되어져 제상릴레이(RY1)가 동작을 하게된다.As the low pressure switch SW 1 is turned off, the compressor start relay RY 2 is inoperative and the start of the compressor is stopped, and the contact b RY 2b is turned on to operate the defrost relay RY 1 . Will be done.

이에 제상용 히타가 가열됨으로서 냉각코일에 발생되어진 성에를 제거하게 되는 것이다.The defrost heater is thus heated to remove the frost generated in the cooling coil.

이때 제상동작 기간에는 보조릴레이(RY3)가 부동작하고 있는 상태이므로 액전자변(SOL1)이 누설등으로 냉매가 냉각코일로 유입되어 저압이 상승하면서 저압 압력스위치(SW1)을 턴온시키더라도 a접점(RY3a)이 턴오프되어 있으므로 압축기가 동작하지 못하여 압축기의 발정이 방지되어진다.The defrosting operation period, even when turning on the auxiliary relay (RY 3) is so that part operating state liquid solenoid valve (SOL 1) the refrigerant is introduced into the cooling coil and the low pressure increases the low-pressure pressure switch in the leakage and so on (SW 1) Since the contact a (RY 3a ) is turned off, the compressor does not operate, and thus the estrus of the compressor is prevented.

이와같을 때 제상타이머(TH1)의 설정시간이 끝나게 되면 그 접점은 a접점(TH1a)으로 접속되어져 액전자변(SOL1)을 동작시킴으로서 전자변이 열리게 되어 압축기에서의 고압냉매가 저압부측인 냉각 코일로 유압되어져 저압 압력스위치(SW1)가 턴온된다.In this case, when the set time of the defrost timer TH 1 is over, the contact point is connected to the contact a 1 TH 1a to operate the liquid electron valve SOL 1 to open the electron valve, and the high pressure refrigerant in the compressor is cooled at the low pressure side. The low pressure switch SW 1 is turned on by being hydraulically applied to the coil.

또한 보조릴레이(RY3)가 여자됨으로서 그 a접점(RY3a)에 의하여 압축기 기동릴레이(RY2)가 여자되어 압축기가 기동을 하게된다.In addition, since the auxiliary relay RY 3 is excited, the compressor starting relay RY 2 is excited by the contact RY 3a to start the compressor.

이에 압축기에서의 고압냉매가 냉각 코일로 흐르게 되면서 주위온도를 낮추게 되는 것이다.The high pressure refrigerant in the compressor flows to the cooling coil to lower the ambient temperature.

이상에서와 같이 본 고안에 의하면 제상동작이 수행되고 냉동기의 펌프 다운이 완료된 부 즉 저압부의 냉매를 고압부로 저장시켜 저압부의 냉매가 완전히 제거되고 그 저압부를 액 전자변에 의해 완전히 분리차단한 이후 비로서 냉각코일에 히타가 가열되도록 하여 제상시의 저압 상승요인을 제거함으로서 압축기를 보호함은 물론 일단 제상운전에 들어가면 액전자변의 누설등으로 인하여 저압이 상승하더라도 제상중에는 압축기가 재기동하지 않도록 회로를 구성하여 제상시 압축기의 발정현상을 방지함으로서 완전히 제상이 보장되어 제상 신뢰도를 높이는 잇점이 있다.As described above, according to the present invention, after the defrosting operation is performed and the pump down of the refrigerator is completed, that is, the refrigerant of the low pressure part is stored in the high pressure part, the refrigerant of the low pressure part is completely removed, and the low pressure part is completely separated and blocked by the liquid electromagnetic valve. It protects the compressor by removing the low pressure rise factor during defrosting by heating the heater to the cooling coil and also configures the circuit so that the compressor does not restart during defrost even if the low pressure rises due to leakage of the liquid electromagnetic valve once the defrost operation is started. By defrosting the compressor during defrosting, the defrosting is completely guaranteed, thereby increasing the defrosting reliability.

Claims (1)

통상의 냉동기에 있어서 저압 압력스위치(SW1)에 압축기용 릴레이(RY2)의 a접점(RY2a)과 보조릴레이(RY3)의 a접점(RY3a)을 병렬 연결하여 압축기 기동릴레이(RY2)를 연결하고 제상릴레이(RY1)에는 압축기 기동릴레이(RY2)의 b접점(RY2b)을 직렬연결하여 타이머(TH1)의 b접점(TH1b)에 연결하되 병렬 연결되는 a접점(TH1a)에는 직렬 연결되는 고내온도 조절스위치(SW2)와 액 전자변(SOL1)을 보조릴레이(RY3)에 병렬연결 하여 구성되는 것을 특징으로 하는 냉동기의 제상에 따른 저압 상승 방지 및 제상 발정 방지회로.The low-pressure pressure switch (SW 1) for a compressor relay (RY 2) of a contact point (RY 2a) and a contact (RY 3a) of the auxiliary relay (RY 3) in a parallel connection in the usual refrigerator compressor start relay (RY 2 ) connection and defrosting relay (RY 1 ) to b contact (RY 2b ) of compressor start relay (RY 2 ) in series and to b contact (TH 1b ) of timer (TH 1 ) (TH 1a ) is a low pressure rise prevention and defrost according to the defrost of the refrigerator, characterized in that the high temperature control switch (SW 2 ) and the electromagnetic valve (SOL 1 ) that is connected in series is configured in parallel to the auxiliary relay (RY 3 ) Estrus prevention circuit.
KR2019870020095U 1987-11-20 1987-11-20 Circuit for defrostin of refrigerator KR900010730Y1 (en)

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KR2019870020095U KR900010730Y1 (en) 1987-11-20 1987-11-20 Circuit for defrostin of refrigerator

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Application Number Priority Date Filing Date Title
KR2019870020095U KR900010730Y1 (en) 1987-11-20 1987-11-20 Circuit for defrostin of refrigerator

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Publication Number Publication Date
KR890011182U KR890011182U (en) 1989-07-13
KR900010730Y1 true KR900010730Y1 (en) 1990-11-30

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