JPH01123966A - Refrigerator - Google Patents
RefrigeratorInfo
- Publication number
- JPH01123966A JPH01123966A JP28170387A JP28170387A JPH01123966A JP H01123966 A JPH01123966 A JP H01123966A JP 28170387 A JP28170387 A JP 28170387A JP 28170387 A JP28170387 A JP 28170387A JP H01123966 A JPH01123966 A JP H01123966A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- pressure side
- heat storage
- side heat
- heat exchange
- 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.)
- Pending
Links
- 238000005338 heat storage Methods 0.000 claims abstract description 43
- 239000011232 storage material Substances 0.000 claims abstract description 26
- 238000010257 thawing Methods 0.000 claims abstract description 24
- 238000005057 refrigeration Methods 0.000 claims description 15
- 239000003507 refrigerant Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 8
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000009835 boiling Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、サーモバンク式ホットガスデフロストとオ
フサイクルデフロストの切替機能を有した冷凍装置にお
いて、サーモバンク内温度の上昇を防止するようにした
冷凍装置に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] This invention is a refrigeration system having a switching function between thermobank type hot gas defrost and off-cycle defrost, which prevents the temperature inside the thermobank from rising. This relates to refrigeration equipment.
第５図は従来の冷凍装置の構成図であり、図において１
は圧縮機、２は凝縮器、３は絞り装置、４は蒸発器、５
はサクションアキュムレータ、６は圧縮機１と蓄熱器９
の高圧側熱交換路１０とを連結する吐出管、７は凝縮器
２絞り装置３間を逆止弁１３と第２の電磁弁１４とを介
して連結する液管、８は蒸発器４とサクションアキュム
レータ５間を第４の電磁弁１６を介して接続するととも
に、吸入圧力調整弁１７を介して蓄熱槽９の低圧側熱交
換路１１に接続する吸入管である。９ａは蓄熱槽９の内
部に充填された蓄熱剤である。Figure 5 is a block diagram of a conventional refrigeration system.
is a compressor, 2 is a condenser, 3 is a throttle device, 4 is an evaporator, 5
is a suction accumulator, 6 is a compressor 1 and a heat storage device 9
7 is a liquid pipe that connects the condenser 2 and the throttle device 3 via the check valve 13 and the second electromagnetic valve 14; 8 is the liquid pipe that connects the evaporator 4 and This is a suction pipe that connects the suction accumulators 5 via a fourth electromagnetic valve 16 and connects to the low-pressure side heat exchange path 11 of the heat storage tank 9 via a suction pressure regulating valve 17. 9a is a heat storage agent filled inside the heat storage tank 9.
低圧側熱交換路１１は吸入バイパス管８ａを介してサク
ションアキュムレータ５に連結されている。The low pressure side heat exchange path 11 is connected to the suction accumulator 5 via a suction bypass pipe 8a.
１２は三方電磁弁であり、その入口側は蓄熱槽９の高圧
側熱交換路１０に連絡され、一方の出口側は上記凝縮器
２に、他方の出口側は吐出バイパス管６ａを介して液管
７に連結されている。12 is a three-way solenoid valve, the inlet side of which is connected to the high-pressure side heat exchange path 10 of the heat storage tank 9, one outlet side to the condenser 2, and the other outlet side to the liquid via the discharge bypass pipe 6a. It is connected to pipe 7.
１５は第３の電磁弁で、その入口側は液バイパス管７ａ
を介して液管７に連結され、出口側は蒸発器４の入口側
に連結されている。１８は凝縮器用送風機、１９は冷却
器用送風機である。15 is a third solenoid valve, the inlet side of which is connected to the liquid bypass pipe 7a.
The outlet side is connected to the inlet side of the evaporator 4. 18 is a condenser blower, and 19 is a cooler blower.
従来、圧縮機１の運転を停止するとともに冷却器用送風
機１９を運転するオフサイクルデフロストと、上記三方
電磁弁１２および第２〜第４の電磁弁１４〜１６の切換
によるホットガスデフロストの双方を備え、蒸発器４の
霜をオフサイクルまたはホットガスデフロストの何れが
一方により除霜する場合実開昭５１−８１４４５号公報
には、庫内温度を検知して、所定温度以上のときはオフ
サイクルによる除霜と、所定温度以下のときはホットガ
スデフロストによる除霜とを切り換える冷蔵庫用冷凍装
置が開示されている。Conventionally, the system includes both an off-cycle defrost operation in which the compressor 1 is stopped and the cooler blower 19 is operated, and a hot gas defrost operation in which the three-way solenoid valve 12 and the second to fourth solenoid valves 14 to 16 are switched. When the frost in the evaporator 4 is to be defrosted by either the off cycle or the hot gas defrost, Japanese Utility Model Application Publication No. 51-81445 states that the temperature inside the refrigerator is detected, and when the temperature is higher than a predetermined temperature, the off cycle is used. A freezing device for a refrigerator is disclosed that switches between defrosting and defrosting using hot gas defrost when the temperature is below a predetermined temperature.
次にホットガスデフロスト装置の動作について説明する
。まず、冷却運転中は冷媒糸路図中、実線矢印のごとく
冷媒が流れて冷却運転を行なう。Next, the operation of the hot gas defrost device will be explained. First, during the cooling operation, the refrigerant flows as shown by the solid arrow in the refrigerant path diagram to perform the cooling operation.
すなわち、第２の電磁弁１４と第４の電磁弁１６が通電
されて開路し、三方電磁弁１２は通電されない状態で高
圧側熱交換路１０と凝縮器２を連通し、第３の電磁弁１
５は通電されない状態で閉路している。That is, the second solenoid valve 14 and the fourth solenoid valve 16 are energized and open, the three-way solenoid valve 12 is not energized and communicates between the high pressure side heat exchange path 10 and the condenser 2, and the third solenoid valve 1
5 is closed in a non-energized state.
一方、蓄熱槽９の蓄熱剤９ａは、圧縮機１からの吐出冷
媒ガスが高圧側熱交換路１０を通過することにより加熱
される。On the other hand, the heat storage agent 9a of the heat storage tank 9 is heated by the refrigerant gas discharged from the compressor 1 passing through the high-pressure side heat exchange path 10.
蓄熱槽９には低圧側熱交換路１１が収納されていて、ホ
ットガス除霜時、上記吸入圧力調整弁１７との併用で再
蒸発装置として使用されるが、次にこの除霜運転につい
て説明する。The heat storage tank 9 houses a low-pressure side heat exchange path 11, which is used as a re-evaporation device in conjunction with the suction pressure regulating valve 17 during hot gas defrosting.Next, this defrosting operation will be explained. do.
上記蒸発器４の着霜を除霜検出器（図示せず）により検
出して、ホットガス除霜を開始すると、三方電磁弁１２
、第３の電磁弁１５が通電され、第２および第４の電磁
弁１４．１６は通電されずに図中の破線矢印の冷媒流れ
となる。When frost formation on the evaporator 4 is detected by a defrost detector (not shown) and hot gas defrost is started, the three-way solenoid valve 12
, the third solenoid valve 15 is energized, and the second and fourth solenoid valves 14, 16 are not energized, resulting in the refrigerant flow as indicated by the dashed arrow in the figure.
すなわち、圧縮機１にて吐出された高圧冷媒ガスは、高
圧側熱交換路１０、三方電磁弁１２、吐出バイパス管５
ａ、液管７、液バイパス管７ａ。That is, the high-pressure refrigerant gas discharged from the compressor 1 passes through the high-pressure side heat exchange path 10, the three-way solenoid valve 12, and the discharge bypass pipe 5.
a, liquid pipe 7, liquid bypass pipe 7a.
第３の電磁弁１５を経て蒸発器４にて除霜を行なうと、
高圧のまま液化冷媒となる。そしてこの液化した高圧液
冷媒はまず吸入圧力調整弁１７にて減圧されて後、低圧
側熱交換路１１で気化されて圧縮機１へ吸入される。When defrosting is performed in the evaporator 4 via the third solenoid valve 15,
It becomes a liquefied refrigerant while remaining under high pressure. The liquefied high-pressure liquid refrigerant is first reduced in pressure by the suction pressure regulating valve 17, then vaporized by the low-pressure side heat exchange path 11 and sucked into the compressor 1.
この際、吸入圧力調整弁１７は圧縮機１の吸入圧力が許
容圧力値を越えないように、使用上限の吸入圧力以下に
設定される。At this time, the suction pressure regulating valve 17 is set to a value below the upper limit of suction pressure for use so that the suction pressure of the compressor 1 does not exceed an allowable pressure value.
なお、蒸発器４の除霜を終えると、除霜検出器（図示せ
ず）により冷却運転に切換えられる。Note that when the defrosting of the evaporator 4 is completed, the defrost detector (not shown) switches to cooling operation.
従来の冷凍装置は以上のように構成されているので、例
えば、庫内温度が所定温度以上に上昇している際に除霜
を迎えることが複数回連続して重なったときには、毎回
オフサイクルによる除霜が開始されることになり、低圧
側熱交換路内を冷媒が流通することなく、高圧側熱交換
路のみを流通するようになる。Conventional refrigeration equipment is configured as described above, so for example, if defrosting occurs multiple times in a row while the internal temperature rises above a predetermined temperature, the off-cycle is activated each time. Defrosting is started, and the refrigerant no longer flows through the low-pressure heat exchange path, but only through the high-pressure heat exchange path.
すなわち、圧縮機１にて吐出された高温高圧冷媒ガスに
て蓄熱槽内の蓄熱剤は加熱されるのみとなり、蓄熱剤は
沸騰し、蓄熱槽内の圧力が上昇し、安全弁（図示せず）
が作動し、蓄熱剤が吹き出してしまうという問題点があ
った。That is, the heat storage agent in the heat storage tank is only heated by the high-temperature, high-pressure refrigerant gas discharged by the compressor 1, the heat storage agent boils, the pressure in the heat storage tank increases, and the safety valve (not shown)
There was a problem that the heat storage agent would blow out when activated.
この発明は、上記のような問題点を解消するためになさ
れたもので、連続オフサイクル除霜による蓄熱剤の沸騰
を防止し得る冷凍装置を得ることを目的とする。This invention was made to solve the above-mentioned problems, and an object thereof is to obtain a refrigeration system that can prevent boiling of a heat storage agent due to continuous off-cycle defrosting.
この発明に係る冷凍装置は、蓄熱槽の高圧側熱交換路の
出入口に設けた温度検出器と高圧側熱交換路を側路する
バイパス配管の途中に配設され高圧側熱交換路の出入口
温度差が所定値以下になると開路するバイパス電磁弁と
を設けたものである。The refrigeration system according to the present invention includes a temperature detector provided at the entrance and exit of the high-pressure side heat exchange path of the heat storage tank, and a temperature sensor installed in the middle of bypass piping that bypasses the high-pressure side heat exchange path. A bypass solenoid valve that opens when the difference becomes less than a predetermined value is provided.
この発明における蓄熱槽の高圧側熱交換路の出入口に設
けた温度検出器によって検出された高圧側熱交換路の出
入口温度差が所定値以下となれば、バイパス電磁弁を開
路させるので、高圧側熱交換路へ流れる高温・高圧冷媒
ガスは少なくなるため、蓄熱剤の温度上昇がなくなり、
蓄熱剤の沸騰するのを防止する。In this invention, if the temperature difference between the entrance and exit of the high-pressure side heat exchange path, which is detected by the temperature detector installed at the entrance and exit of the high-pressure side heat exchange path of the heat storage tank, becomes less than a predetermined value, the bypass solenoid valve is opened. As the amount of high-temperature, high-pressure refrigerant gas flowing into the heat exchange path is reduced, the temperature of the heat storage agent no longer increases.
Prevents heat storage agent from boiling.
以下、この発明の冷凍装置の実施例を図に基づいて説明
する。第１図はその一実施例による冷凍装置の冷凍サイ
クル構成回である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the refrigeration system of the present invention will be described below with reference to the drawings. FIG. 1 shows a refrigeration cycle configuration of a refrigeration system according to one embodiment.
この第１図において、構成の説明に際し、第５図と同一
部分には同一符号を付してその重複説明を避は第５図と
は異なる部分を述べる。In FIG. 1, when describing the configuration, parts that are the same as those in FIG. 5 are given the same reference numerals to avoid redundant explanation, and only parts that are different from those in FIG. 5 will be described.
この第１図では、蓄熱槽１の高圧側熱交換路１゜の出入
口側に温度検出器（第１図では図示せず）が設けられて
おり、又、この高圧側熱交換路１゜を側路するバイパス
配管３１が設けられている。In FIG. 1, a temperature detector (not shown in FIG. 1) is provided on the inlet/outlet side of the high-pressure side heat exchange path 1° of the heat storage tank 1, and the high-pressure side heat exchange path 1° is Bypass piping 31 is provided.
このバイパス配管３１には、バイパス電磁弁３２が設け
られている。バイパス電磁弁３２は入口温度検出器と出
口温度検出器の温度差に基づいて開閉されるものである
。その他の構成は第５図と同様である。This bypass piping 31 is provided with a bypass solenoid valve 32 . The bypass solenoid valve 32 is opened and closed based on the temperature difference between the inlet temperature detector and the outlet temperature detector. The other configurations are the same as in FIG. 5.
第２図はこの実施例の除霜制御回路にマイクロコンピュ
ータを用いた場合のブロック図である。FIG. 2 is a block diagram when a microcomputer is used in the defrosting control circuit of this embodiment.
この第２図において２０は、比較回路２８、演算回路２
９、選択回路３０より構成されるマイクロコンピュータ
、２１は高圧側熱交換路１ｏの上記入口温度検出器、２
１ａは上記出口温度検出器、２２は庫内温度検出器、２
３は除霜開始信号発生回路、２４はオフサイクルデフロ
スト用リレー回路、２５はホットガスデフロスト用リレ
ー回路、２６．２７は除霜終了信号発生回路である。In this FIG. 2, 20 is a comparison circuit 28, an arithmetic circuit 2
9, a microcomputer consisting of a selection circuit 30; 21, the above-mentioned inlet temperature detector of the high-pressure side heat exchange path 1o; 2;
1a is the outlet temperature detector, 22 is the internal temperature detector, 2
3 is a defrost start signal generation circuit, 24 is an off-cycle defrost relay circuit, 25 is a hot gas defrost relay circuit, and 26.27 is a defrost end signal generation circuit.
以下、このブロック図について、第３図の庫内温度と蓄
熱剤温度の関係図および第４図のフローチャートに基づ
いて説明する。第３図で時刻Ｔ１に除霜開始信号が出る
とすると、この場合は庫内温度が設定温度（４℃）より
高いため、オフサイクルデフロストを行ない、除霜終了
信号発生回路２６により信号が出ると時刻Ｔ２で除霜が
終了し、再び冷却運転に入る。Hereinafter, this block diagram will be explained based on the relationship diagram between the internal temperature and the heat storage agent temperature shown in FIG. 3 and the flowchart shown in FIG. 4. Assuming that the defrost start signal is output at time T1 in FIG. 3, in this case, the internal temperature is higher than the set temperature (4°C), so off-cycle defrost is performed and the defrost end signal generation circuit 26 outputs a signal. Defrosting ends at time T2, and cooling operation begins again.
冷却運転が続き、蓄熱剤温度が上昇してくる。Cooling operation continues and the temperature of the heat storage agent rises.
蓄熱剤温度が上昇すると、高圧側熱交換路１０内での熱
交換量が減少するため、高圧側熱交換路１０の出口温度
が上昇し、高圧側熱交換路１０で出入口温度差が縮まり
、ステップＳ１で所定温度差（ΔＴ）になると、バイパ
ス電磁弁３２が開き（ステップＳ２）、高温・高圧ガス
を高圧側熱交換路１０をバイパスさせる。When the heat storage agent temperature rises, the amount of heat exchanged within the high-pressure side heat exchange path 10 decreases, so the outlet temperature of the high-pressure side heat exchange path 10 increases, and the temperature difference between the entrance and exit of the high-pressure side heat exchange path 10 decreases. When a predetermined temperature difference (ΔT) is reached in step S1, the bypass solenoid valve 32 opens (step S2), causing the high temperature and high pressure gas to bypass the high pressure side heat exchange path 10.
したがって、蓄熱剤温度は自然放熱により低下する。時
刻Ｔ、にステップＳ３で除霜開始信号が出ると、この場
合は庫内温度が設定温度（４℃）より低いため、ステッ
プＳ４からステップＳ５に移行して、ホットガスデフロ
ストを行ないステップＳ６で除霜終了信号発生回路２７
により信号が出ると時刻Ｔ４で除霜終了する。Therefore, the temperature of the heat storage agent decreases due to natural heat radiation. When the defrosting start signal is issued in step S3 at time T, in this case, the temperature inside the refrigerator is lower than the set temperature (4°C), so the process moves from step S4 to step S5, hot gas defrosting is performed, and step S6 Defrost end signal generation circuit 27
When a signal is issued, defrosting ends at time T4.
時刻Ｔ４で除霜終了後、再び冷却運転に入り、蓄熱剤温
度が上昇し、出入口温度差が所定温度差（ΔＴ）になる
と、バイパス電磁弁３２を開け、蓄熱剤温度の上昇を防
止する。After defrosting is completed at time T4, the cooling operation is started again, and when the temperature of the heat storage agent increases and the temperature difference between the entrance and exit reaches a predetermined temperature difference (ΔT), the bypass solenoid valve 32 is opened to prevent the temperature of the heat storage agent from increasing.
なお、ステップＳ４において、庫内温度が設定温度（４
℃）より高いときには、ステップＳ７のオフサイクルデ
フロストを経てステップＳ６に進み、ステップＳ６で除
霜が終了しなければ、ステップＳ８でオフサイクルデフ
ロストであればステップＳ７に戻りオフサイクルデフロ
ストでなければステップＳ５に戻る。In addition, in step S4, the temperature inside the refrigerator reaches the set temperature (4
℃), the process proceeds to step S6 via off-cycle defrost in step S7, and if defrosting is not completed in step S6, the process returns to step S7 if off-cycle defrost is detected in step S8, and step S7 is resumed if not off-cycle defrost. Return to S5.
以上のように、この発明によれば、蓄熱槽の高圧側熱交
換路の出入口に温度検出器を設けるとともに高圧側熱交
換路を側路するバイパス配管を設け、そのバイパス配管
の途中に高圧側熱交換路の出入口温度差により開閉する
バイパス電磁弁を設けるように構成したので、連続オフ
サイクル除霜により蓄熱剤温度が上昇した場合でも、高
圧側熱交換路の出入口温度差が所定値以下になれば、バ
イパス電磁弁を開路させて、高圧側熱交換路には高温・
高圧冷媒ガスは流れなくなり、蓄熱剤の温度上昇を防止
する。As described above, according to the present invention, a temperature detector is provided at the entrance and exit of the high-pressure side heat exchange path of the heat storage tank, and a bypass pipe that bypasses the high-pressure side heat exchange path is provided, and the high-pressure side Since the structure is equipped with a bypass solenoid valve that opens and closes depending on the temperature difference between the entrance and exit of the heat exchange path, even if the temperature of the heat storage agent increases due to continuous off-cycle defrosting, the temperature difference between the entrance and exit of the high-pressure side heat exchange path remains below a predetermined value. If so, open the bypass solenoid valve to prevent high temperature and
High-pressure refrigerant gas stops flowing, preventing the temperature of the heat storage agent from rising.
これにともない、蓄熱剤の温度上昇により蓄熱槽内の圧
力を上昇させ、蓄熱剤が吹き出すという不具合が解消さ
れ、安定した運転を行なうことができる効果がある。This eliminates the problem of the heat storage agent blowing out due to the increase in the temperature of the heat storage agent, which increases the pressure in the heat storage tank, and has the effect of making it possible to perform stable operation.
第１図はこの発明の一実施例による冷凍装置の冷凍サイ
クル構成図、第２図は同上実施例における除霜制御開路
を示すブロック図、第３図は同上実施例における制御動
作を説明するための庫内温度と蓄熱剤温度・バイパスの
電磁弁の開閉状態を示す関係図、第４図は同上実施例の
動作を示すフローチャート図、第５図は従来の冷凍装置
の冷凍サイクル構成図である。
１・・・圧縮機、２・・・凝縮器、３・・・絞り装置、
４・・・蒸発器、１０・・・高圧側熱交換路、９・・・
蓄熱槽、９ａ・・・蓄熱剤、１１・・・低圧側熱交換路
、２０・・・マイクロコンピュータ、２１・・・入口温
度検出器、２１ａ・・・出口温度検出器、２２・・・庫
内温度検出器、２３・・・除霜開始信号発生回路、３０
・・・選択回路、３１・・・バイパス配管、３２・・・
バイパス電磁弁。
なお、図中、同一符号は同一、又は相当部分を示す。Fig. 1 is a refrigeration cycle configuration diagram of a refrigeration system according to an embodiment of the present invention, Fig. 2 is a block diagram showing defrosting control opening in the embodiment as described above, and Fig. 3 is for explaining the control operation in the embodiment as described above. FIG. 4 is a flowchart showing the operation of the above embodiment, and FIG. 5 is a refrigeration cycle configuration diagram of a conventional refrigeration system. . 1... Compressor, 2... Condenser, 3... Squeezing device,
4... Evaporator, 10... High pressure side heat exchange path, 9...
Heat storage tank, 9a... Heat storage agent, 11... Low pressure side heat exchange path, 20... Microcomputer, 21... Inlet temperature detector, 21a... Outlet temperature detector, 22... Warehouse Internal temperature detector, 23...defrosting start signal generation circuit, 30
...Selection circuit, 31...Bypass piping, 32...
Bypass solenoid valve. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
低圧側とにそれぞれ設けられた熱交換路ならびに蓄熱剤
を内蔵する蓄熱槽を備えた冷凍装置において、除霜開始
信号発生回路の出力によって、上記絞り装置を側路し上
記圧縮機から吐出される高温の冷媒を上記蒸発器に供給
して除霜を行ない、かつ上記蒸発器から送出される液冷
媒を上記低圧側熱交換路に供給して上記蓄熱剤を冷却す
るホットガスデフロスト手段、除霜開始信号発生回路の
出力によって上記圧縮機の運転を停止して除霜を行なう
オフサイクルデフロスト手段、上記高圧側熱交換路の入
口と出口温度を検出する温度検出器、冷凍庫又は冷蔵庫
の庫内温度が予め設定された設定温度以上で、上記蓄熱
剤温度が所定温度以下のとき、上記除霜開始信号発生回
路の出力によってオフサイクルデフロストを選択し、上
記庫内温度が所定値以下のとき上記ホットガスデフロス
トを選択する選択回路、上記高圧側熱交換路を側路し、
途中にバイパス電磁弁を有するバイパス配管、上記出口
温度検出器の出力信号により上記高圧側熱交換路の出入
口温度差を計算し、一定の温度差になると上記バイパス
電磁弁を開閉制御するマイクロコンピュータを備えたこ
とを特徴とする冷凍装置。In a refrigeration system equipped with a compressor, a condenser, a throttle device, an evaporator, heat exchange paths provided on the high-pressure side and low-pressure side, and a heat storage tank containing a heat storage agent, the output of the defrost start signal generation circuit By bypassing the expansion device, the high-temperature refrigerant discharged from the compressor is supplied to the evaporator for defrosting, and the liquid refrigerant sent from the evaporator is sent to the low-pressure side heat exchange path. a hot gas defrost means for supplying hot gas to cool the heat storage agent; an off-cycle defrost means for defrosting by stopping the operation of the compressor according to the output of a defrost start signal generating circuit; an inlet of the high-pressure side heat exchange path; A temperature detector detects the outlet temperature, and when the temperature inside the freezer or refrigerator is above a preset temperature and the temperature of the heat storage agent is below a predetermined temperature, off-cycle defrost is performed by the output of the defrost start signal generation circuit. a selection circuit that selects the hot gas defrost when the temperature inside the refrigerator is below a predetermined value, and bypasses the high-pressure side heat exchange path;
Bypass piping having a bypass solenoid valve in the middle, and a microcomputer that calculates the temperature difference at the entrance and exit of the high-pressure side heat exchange path based on the output signal of the outlet temperature detector, and controls the opening and closing of the bypass solenoid valve when a certain temperature difference is reached. A refrigeration device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28170387A JPH01123966A (en) | 1987-11-07 | 1987-11-07 | Refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28170387A JPH01123966A (en) | 1987-11-07 | 1987-11-07 | Refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01123966A true JPH01123966A (en) | 1989-05-16 |
Family
ID=17642802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28170387A Pending JPH01123966A (en) | 1987-11-07 | 1987-11-07 | Refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01123966A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012068001A (en) * | 2010-09-27 | 2012-04-05 | Mitsubishi Electric Corp | Outdoor unit and air conditioning device |
| JP2013185808A (en) * | 2012-03-12 | 2013-09-19 | Rinnai Corp | Heat pump |
| JP2015206587A (en) * | 2015-07-07 | 2015-11-19 | 三菱重工冷熱株式会社 | Method for defrosting load cooler |
| JP2018189340A (en) * | 2017-05-11 | 2018-11-29 | ホシザキ株式会社 | Cooling storage box |
| US11262114B2 (en) * | 2016-04-11 | 2022-03-01 | Begafrost S.R.L. | System for deicing an external evaporator for heat pump systems |
| CN117469764A (en) * | 2023-12-26 | 2024-01-30 | 珠海格力电器股份有限公司 | Defrosting control method and device for air conditioner, air conditioner and storage medium |
-
1987
- 1987-11-07 JP JP28170387A patent/JPH01123966A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012068001A (en) * | 2010-09-27 | 2012-04-05 | Mitsubishi Electric Corp | Outdoor unit and air conditioning device |
| JP2013185808A (en) * | 2012-03-12 | 2013-09-19 | Rinnai Corp | Heat pump |
| JP2015206587A (en) * | 2015-07-07 | 2015-11-19 | 三菱重工冷熱株式会社 | Method for defrosting load cooler |
| US11262114B2 (en) * | 2016-04-11 | 2022-03-01 | Begafrost S.R.L. | System for deicing an external evaporator for heat pump systems |
| JP2018189340A (en) * | 2017-05-11 | 2018-11-29 | ホシザキ株式会社 | Cooling storage box |
| CN117469764A (en) * | 2023-12-26 | 2024-01-30 | 珠海格力电器股份有限公司 | Defrosting control method and device for air conditioner, air conditioner and storage medium |
| CN117469764B (en) * | 2023-12-26 | 2024-03-22 | 珠海格力电器股份有限公司 | Defrosting control method and device for air conditioner, air conditioner and storage medium |
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