JP2021011960A - Refrigerant charging device - Google Patents
Refrigerant charging device Download PDFInfo
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- JP2021011960A JP2021011960A JP2019124975A JP2019124975A JP2021011960A JP 2021011960 A JP2021011960 A JP 2021011960A JP 2019124975 A JP2019124975 A JP 2019124975A JP 2019124975 A JP2019124975 A JP 2019124975A JP 2021011960 A JP2021011960 A JP 2021011960A
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- refrigerant
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- refrigerant filling
- filling device
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 371
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000004781 supercooling Methods 0.000 claims description 89
- 239000007788 liquid Substances 0.000 claims description 38
- 238000004891 communication Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 10
- 230000006870 function Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 5
- 239000010721 machine oil Substances 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
Classifications
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/001—Charging refrigerant to a cycle
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2345/00—Details for charging or discharging refrigerants; Service stations therefor
- F25B2345/003—Control issues for charging or collecting refrigerant to or from a cycle
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
本発明は、冷媒回路に冷媒を充填する冷媒充填装置に関するものである。 The present invention relates to a refrigerant filling device that fills a refrigerant circuit with a refrigerant.
例えば、空気調和機をリプレイスする場合、施工者が冷媒の充填量を室内機の台数や配管容積などから算出し、手動で冷媒充填することが一般的であるが、充填量の算出に誤りがあると、冷媒の不足や過充填が生じるという課題がある。 For example, when replacing an air conditioner, it is common for the installer to calculate the amount of refrigerant charged from the number of indoor units and the volume of piping, and then manually fill the amount of refrigerant, but there is an error in the calculation of the amount of refrigerant. If there is, there is a problem that the refrigerant is insufficient or overfilled.
このような課題を解消するために、特許文献１では、冷媒を自動で充填するための、冷媒自動充填技術が提案されている。
冷媒充填を自動で制御する技術としては、冷媒回路を流れる冷媒量の検知しながら冷媒を充填するように構成されたものがある。かかる構成では、冷媒量を正確に検知するために、及び、圧縮機に液戻りが発生して、圧縮機の故障などの信頼性を悪化させることを防止するために、冷媒回路の状態を安定させる必要があり、冷媒を高速で充填することがで
きない。
In order to solve such a problem, Patent Document 1 proposes an automatic refrigerant filling technique for automatically filling a refrigerant.
As a technique for automatically controlling the refrigerant filling, there is a technique configured to fill the refrigerant while detecting the amount of the refrigerant flowing through the refrigerant circuit. In such a configuration, the state of the refrigerant circuit is stabilized in order to accurately detect the amount of the refrigerant and to prevent the compressor from returning to the liquid and deteriorating the reliability such as the failure of the compressor. It is necessary to make the refrigerant fill at high speed.
そこで、液戻りを防ぎつつ、冷媒の充填速度の向上を図るものとしては、特許文献１に示すように、充填される冷媒が流れる充填回路に絞り装置を設けておき、圧縮機の吐出過熱度に基づいて、充填流量が適切となるように、絞り装置の絞り開度を調整するように構成されたものがある。しかしながら、このような絞り装置を利用する構成であると、装置全体が高価なものとなる。 Therefore, in order to improve the filling speed of the refrigerant while preventing the liquid from returning, as shown in Patent Document 1, a throttle device is provided in the filling circuit through which the filled refrigerant flows, and the discharge superheat degree of the compressor is provided. Based on the above, there is one configured to adjust the throttle opening of the throttle device so that the filling flow rate becomes appropriate. However, if such a diaphragm device is used, the entire device becomes expensive.
そこで、本発明は、上述した問題を一挙に解決すべくなされたものであり、充填速度を向上させるとともに、コストを抑えつつも液戻りを防ぐことで、安価で信頼性の高い冷媒充填装置を提供することを主たる課題とするものである。 Therefore, the present invention has been made to solve the above-mentioned problems at once, and by improving the filling speed and preventing the liquid from returning while suppressing the cost, an inexpensive and highly reliable refrigerant filling device can be provided. The main issue is to provide.
すなわち本発明に係る冷媒充填装置は、圧縮機、室外熱交換器、及び膨張弁を有する室外機と、室内熱交換器を有する室内機と、前記室外熱交換器及び前記室内熱交換器を接続するとともに液状の冷媒を搬送する液管及びガス状の冷媒を搬送するガス管を有する冷媒回路と、を備える空気調和機に冷媒を充填する装置であって、前記冷媒回路に接続される冷媒充填ポートを有した冷媒充填回路と、前記冷媒充填回路に設けられた開閉バルブと、前記開閉バルブを制御する制御機構とを具備し、前記制御機構が、前記圧縮機から吐出側の冷媒温度及び冷媒圧力から冷媒の吐出過熱度を算出する吐出過熱度算出部と、前記吐出過熱度算出部により算出された吐出過熱度に基づいて、前記開閉バルブを制御するバルブ制御部とを備えることを特徴とするものである。 That is, the refrigerant filling device according to the present invention connects an outdoor unit having a compressor, an outdoor heat exchanger, and an expansion valve, an indoor unit having an indoor heat exchanger, the outdoor heat exchanger, and the indoor heat exchanger. A device for filling an air conditioner including a refrigerant circuit having a liquid pipe for transporting a liquid refrigerant and a gas pipe for transporting a gaseous refrigerant, and filling the refrigerant connected to the refrigerant circuit. A refrigerant filling circuit having a port, an on-off valve provided in the refrigerant filling circuit, and a control mechanism for controlling the on-off valve are provided, and the control mechanism controls the refrigerant temperature and the refrigerant on the discharge side from the compressor. It is characterized by including a discharge superheat degree calculation unit that calculates the discharge superheat degree of the refrigerant from the pressure, and a valve control unit that controls the on-off valve based on the discharge superheat degree calculated by the discharge superheat degree calculation unit. It is something to do.
このように構成された冷媒充填装置によれば、算出された吐出過熱度に基づいて開閉バルブを制御するので、吐出過熱度を高く確保できている場合には、開閉バルブを開いたまま冷媒を例えば所定時間充填し続けることで、充填速度の向上を図れる。
一方、この所定時間内に吐出過熱度が所定の閾値を下回った場合には、開閉バルブを閉じることで、液戻りが発生する前に冷媒の充填を停止させることができる。
このように、本発明に係る冷媒充填装置によれば、開閉バルブを利用した安価な構成でありつつも、充填速度を向上させることが可能であり、なおかつ液戻りを防ぐことにより、信頼性を担保することができる。
According to the refrigerant filling device configured in this way, the on-off valve is controlled based on the calculated discharge superheat degree. Therefore, when the discharge overheat degree can be secured high, the refrigerant is discharged with the on-off valve open. For example, the filling speed can be improved by continuing filling for a predetermined time.
On the other hand, when the discharge superheat degree falls below a predetermined threshold value within this predetermined time, the filling of the refrigerant can be stopped before the liquid return occurs by closing the on-off valve.
As described above, according to the refrigerant filling device according to the present invention, it is possible to improve the filling speed and prevent the liquid from returning, while maintaining an inexpensive configuration using an on-off valve, thereby improving reliability. Can be secured.
液戻りが発生する前に冷媒の充填を停止させる具体的な態様としては、前記バルブ制御部は、前記吐出過熱度が所定の閾値を下回った場合に、前記開閉バルブを閉じる態様を挙げることができる。 As a specific mode for stopping the filling of the refrigerant before the liquid return occurs, the valve control unit may close the on-off valve when the discharge superheat degree falls below a predetermined threshold value. it can.
液戻りの発生をより確実に防ぐためには、前記バルブ制御部は、前記吐出過熱度が前記閾値を下回っていない場合であっても、前記吐出過熱度が、所定の閾値より大きい変化率で減少した場合に、前記開閉バルブを閉じることが好ましい。 In order to more reliably prevent the occurrence of liquid return, the valve control unit reduces the discharge superheat degree at a rate of change larger than the predetermined threshold value even when the discharge superheat degree does not fall below the threshold value. When this happens, it is preferable to close the on-off valve.
適切な冷媒量を充填するためには、前記制御機構が、冷媒量を検知するための冷媒量検知部をさらに備え、前記バルブ制御部が、前記冷媒量検知部の検知結果に基づいて、前記開閉バルブを制御することが好ましい。 In order to fill an appropriate amount of refrigerant, the control mechanism further includes a refrigerant amount detecting unit for detecting the amount of refrigerant, and the valve control unit is based on the detection result of the refrigerant amount detecting unit. It is preferable to control the on-off valve.
冷媒量を検知するための具体的な態様としては、前記制御機構が、前記室外熱交換器の出口側の冷媒温度と冷媒圧力とから冷媒の過冷却度を算出される過冷却度算出部を備え、前記冷媒量検知部が、前記過冷却度と予め設定された目標過冷却度との差から、冷媒量を検知する態様を挙げることができる。 As a specific embodiment for detecting the amount of refrigerant, the control mechanism uses a supercooling degree calculation unit that calculates the degree of refrigerant supercooling from the refrigerant temperature and the refrigerant pressure on the outlet side of the outdoor heat exchanger. A mode in which the refrigerant amount detecting unit detects the amount of the refrigerant from the difference between the supercooling degree and the preset target supercooling degree can be mentioned.
前記目標過冷却度は、種々の環境に応じて定まることから、前記目標過冷却度が、室外温度、室内温度、又は配管長の少なくとも１つをパラメータとして定められていることが好ましい。 Since the target supercooling degree is determined according to various environments, it is preferable that the target supercooling degree is set with at least one of the outdoor temperature, the indoor temperature, and the pipe length as a parameter.
吐出過熱度に基づき開閉バルブの制御方法として、例えば冷媒の充填開始後、算出された吐出過熱度が閾値に到るまで、開閉バルブを開き続ければ、充填速度をより向上させることができるように思われる。
ところが、このような制御をする場合、開閉バルブの制御の応答性を速くしなければ、吐出過熱度が閾値を上回り、液戻りが発生する恐れがある。しかし、開閉バルブの制御の応答性を速くすると、装置としては高価なものとなる。
そこで、前記バルブ制御部は、前記過冷却度が前記目標過冷却度よりも小さい間においては、所定の開放時間だけ前記開閉バルブを開放する動作と、所定の閉鎖時間だけ前記開閉バルブを閉鎖する動作とを繰り返すことが好ましい。
このような構成であれば、安価な構成にしつつも、充填速度を可及的に向上させることができ、なおかつ液戻りを確実に防ぐことができる。
As a control method of the on-off valve based on the discharge superheat degree, for example, if the on-off valve is continuously opened after the start of filling the refrigerant until the calculated discharge superheat degree reaches the threshold value, the filling speed can be further improved. Seem.
However, in the case of such control, if the responsiveness of the control of the on-off valve is not increased, the discharge superheat degree may exceed the threshold value and liquid return may occur. However, if the control response of the on-off valve is increased, the device becomes expensive.
Therefore, the valve control unit opens the on-off valve for a predetermined opening time and closes the on-off valve for a predetermined closing time while the supercooling degree is smaller than the target supercooling degree. It is preferable to repeat the operation.
With such a configuration, the filling speed can be improved as much as possible while the configuration is inexpensive, and liquid return can be reliably prevented.
前記バルブ制御部は、前記過冷却度と前記目標過冷却度との差が所定の値よりも大きい場合に、前記開放時間を長くし、又は、前記閉鎖時間を短くし、前記過冷却度と前記目標過冷却度との差が所定の値よりも小さい場合に、前記開放時間を短くし、又は、前記閉鎖時間を長くすることが好ましい。
このような構成であれば、算出された過冷却度が目標過冷却度に近づくように開閉バルブの開時間又は閉時間を変更することで、冷媒回路に所望の冷媒量を充填することができる。
When the difference between the supercooling degree and the target supercooling degree is larger than a predetermined value, the valve control unit increases the opening time or shortens the closing time to obtain the supercooling degree. When the difference from the target supercooling degree is smaller than a predetermined value, it is preferable to shorten the opening time or lengthen the closing time.
With such a configuration, the refrigerant circuit can be filled with a desired amount of refrigerant by changing the opening time or closing time of the on-off valve so that the calculated supercooling degree approaches the target supercooling degree. ..
より具体的な態様としては、前記バルブ制御部は、前記過冷却度と前記目標過冷却度との差に比例して、前記開放時間を短くし、又は、前記閉鎖時間を長くする態様を挙げることができる。 As a more specific embodiment, the valve control unit may shorten the opening time or lengthen the closing time in proportion to the difference between the supercooling degree and the target supercooling degree. be able to.
ところで、室外温度が低い場合に冷媒を多量に充填すると、冷媒回路のうち本来であれば液冷媒が溜まらない部分（例えば、圧縮機の吸入側のガス配管やアキュムレータなど）に液冷媒が溜まってしまい、冷媒回路内の冷媒量と過冷却度との特性が崩れ、冷媒の充填精度が低下する。
そこで、室外温度が低いほど、前記開閉バルブの開時間が短い、又は、前記開閉バルブの閉時間が長いことが好ましい。
By the way, when a large amount of refrigerant is filled when the outdoor temperature is low, the liquid refrigerant collects in the part of the refrigerant circuit where the liquid refrigerant does not normally collect (for example, the gas pipe or accumulator on the suction side of the compressor). As a result, the characteristics of the amount of refrigerant in the refrigerant circuit and the degree of supercooling are destroyed, and the filling accuracy of the refrigerant is lowered.
Therefore, it is preferable that the lower the outdoor temperature, the shorter the opening time of the on-off valve or the longer the closing time of the on-off valve.
前記バルブ制御部が、前記過冷却度算出部により算出された過冷却度の変化率に基づいて、前記開閉バルブの開時間又は閉時間を変更することが好ましい。
このように過冷却度の変化率に基づいて開閉バルブを制御することで、例えば算出過冷却度が目標過冷却度に到達するまでの時間などをある程度予測することができ、冷媒の充填精度を向上させることができる。
It is preferable that the valve control unit changes the opening time or closing time of the opening / closing valve based on the rate of change of the supercooling degree calculated by the supercooling degree calculation unit.
By controlling the on-off valve based on the rate of change of the supercooling degree in this way, for example, the time until the calculated supercooling degree reaches the target supercooling degree can be predicted to some extent, and the filling accuracy of the refrigerant can be improved. Can be improved.
前記室外機は、前記液管側に設けられた第１の冷媒充填ポートと、前記ガス管側に設けられた第２の冷媒充填ポートと、を備え、前記冷媒充填装置は、前記空気調和機が運転前に停止しているときに、前記第１の冷媒充填ポートから冷媒を充填し、前記空気調和機が、前記室外熱交換器が凝縮器として機能するとともに、前記室内熱交換器が蒸発器として機能する冷媒充填運転を行うときに、前記第２の冷媒充填ポートから冷媒を充填することが好ましい。
このような構成であれば、空気調和機Ｚの運転状態に応じて、液管及びガス管のそれぞれから冷媒を充填できるので、充填量を増大させることができる。
The outdoor unit includes a first refrigerant filling port provided on the liquid pipe side and a second refrigerant filling port provided on the gas pipe side, and the refrigerant filling device is the air exchanger. When is stopped before operation, the refrigerant is filled from the first refrigerant filling port, and the air conditioner causes the outdoor heat exchanger to function as a condenser and the indoor heat exchanger to evaporate. When performing the refrigerant filling operation that functions as a container, it is preferable to fill the refrigerant from the second refrigerant filling port.
With such a configuration, the refrigerant can be filled from each of the liquid pipe and the gas pipe according to the operating state of the air conditioner Z, so that the filling amount can be increased.
例えば空気調和機の運転開始の前後など、タイミングに応じて冷媒を充填するための冷媒充填ポートを切り替えるためには、前記冷媒充填装置は、前記第１の冷媒充填ポートに冷媒を充填するための、第１の冷媒充填回路と、前記第２の冷媒充填ポートに冷媒を充填するための、第２の冷媒充填回路と、を備えることが好ましい。 In order to switch the refrigerant filling port for filling the refrigerant according to the timing, for example, before and after the start of operation of the air conditioner, the refrigerant filling device is for filling the first refrigerant filling port with the refrigerant. , A first refrigerant filling circuit and a second refrigerant filling circuit for filling the second refrigerant filling port with a refrigerant are preferably provided.
前記第１の冷媒充填回路は、充填される冷媒の流れを制御するための第１の開閉バルブを有し、前記第２の冷媒充填回路は、充填される冷媒の流れを制御するための第２の開閉バルブを有し、前記第１の開閉バルブの口径が、前記第２の開閉バルブの口径より大きいことが好ましい。
このような構成であれば、空気調和機の運転開始の前後において、前記第１の冷媒充填回路と、前記第２の冷媒充填回路と、を使用して充填する充填量を、それぞれ適切な量にすることができる。
The first refrigerant filling circuit has a first on-off valve for controlling the flow of the filled refrigerant, and the second refrigerant filling circuit has a second for controlling the flow of the filled refrigerant. It is preferable to have two on-off valves, and the diameter of the first on-off valve is larger than the diameter of the second on-off valve.
With such a configuration, before and after the start of operation of the air conditioner, the filling amount to be filled by using the first refrigerant filling circuit and the second refrigerant filling circuit is an appropriate amount. Can be.
前記空気調和機は、冷房運転又は暖房運転を行うための制御部を備え、前記冷媒充填装置は、前記冷媒充填回路が前記空気調和機と別体の筐体に収容されたものであり、前記バルブ制御部が、前記空気調和機の前記制御部に収容されており、前記空気調和機と前記冷媒充填装置とが、有線又は無線で、互いに通信するための通信手段を有し、前記通信手段を介して、前記開閉バルブが制御されることが好ましい。
このような構成であれば、制御部が、室外機に収容されているので、冷暖房運転を制御する制御部に、開閉バルブの制御を担わせることができる。これにより、開閉バルブを制御するための専用の制御部は不要であり、装置をより安価でよりシンプルな構成にすることができる。
The air conditioner includes a control unit for performing a cooling operation or a heating operation, and the refrigerant filling device has a refrigerant filling circuit housed in a housing separate from the air conditioner. The valve control unit is housed in the control unit of the air conditioner, and the air conditioner and the refrigerant filling device have a communication means for communicating with each other by wire or wirelessly, and the communication means. It is preferable that the on-off valve is controlled via the air conditioner.
With such a configuration, since the control unit is housed in the outdoor unit, the control unit that controls the heating / cooling operation can control the on-off valve. As a result, a dedicated control unit for controlling the on-off valve is not required, and the device can be made cheaper and simpler.
より具体的な実施態様としては、前記通信手段は、インターネットを介して通信することが可能であり、前記制御部の制御は、前記通信手段を介して得られた情報によって、制御を変更することが可能である態様を挙げることができる。 In a more specific embodiment, the communication means can communicate via the Internet, and the control of the control unit changes the control according to the information obtained through the communication means. Can be mentioned.
例えば、冷媒ボンベから冷媒をそのまま充填する場合、充填速度の向上を図るべく充填量を増大させると、圧縮機の吸入側の冷媒が気液二相になり、圧縮機の信頼性を損なわれる。このため、圧縮機の信頼性を担保しようとすれば、充填速度の向上には限度がある。
そこで、前記冷媒回路に充填する冷媒を減圧する減圧手段を備えることが好ましい。
このような構成であれば、冷媒ボンベの冷媒を減圧させて充填させることができるので、冷媒ボンベの冷媒をそのまま充填する場合に比べて、圧縮機の吸入側の冷媒をよりガス化することができ、圧縮機の信頼性を損なうことなく、充填速度のさらなる向上を図れる。
For example, when the refrigerant is filled from the refrigerant cylinder as it is, if the filling amount is increased in order to improve the filling speed, the refrigerant on the suction side of the compressor becomes two phases of gas and liquid, and the reliability of the compressor is impaired. Therefore, if the reliability of the compressor is to be ensured, there is a limit to the improvement of the filling speed.
Therefore, it is preferable to provide a depressurizing means for depressurizing the refrigerant filled in the refrigerant circuit.
With such a configuration, the refrigerant in the refrigerant cylinder can be depressurized and filled, so that the refrigerant on the suction side of the compressor can be further gasified as compared with the case where the refrigerant in the refrigerant cylinder is filled as it is. This makes it possible to further improve the filling speed without impairing the reliability of the compressor.
前記減圧手段の具体的な実施態様としては、前記冷媒充填回路に設けられた膨張弁や、前記冷媒充填回路を構成するキャピラリー管を挙げることができる。 Specific embodiments of the pressure reducing means include an expansion valve provided in the refrigerant filling circuit and a capillary pipe constituting the refrigerant filling circuit.
また、前記冷媒回路に充填する冷媒を加熱する加熱手段を備えても良い。
このような構成であっても、冷媒ボンベの冷媒をそのまま充填する場合に比べて、圧縮機の吸入側の冷媒をガス冷媒にすることができ、圧縮機の信頼性を損なうことなく、充填速度のさらなる向上を図れる。
Further, a heating means for heating the refrigerant to be filled in the refrigerant circuit may be provided.
Even with such a configuration, the refrigerant on the suction side of the compressor can be a gas refrigerant as compared with the case where the refrigerant in the refrigerant cylinder is filled as it is, and the filling speed is not impaired without impairing the reliability of the compressor. Can be further improved.
前記加熱手段の具体的な実施態様としては、ヒータや、前記冷媒充填回路を流れる冷媒と、前記冷媒回路を流れる高温冷媒との間で熱交換させるものや、前記冷媒充填回路を流れる冷媒と、前記冷媒充填回路の周囲の空気との間で熱交換させるものを挙げることができる。 Specific embodiments of the heating means include a heater, a refrigerant that flows through the refrigerant filling circuit, and a high-temperature refrigerant that flows through the refrigerant circuit, and a refrigerant that flows through the refrigerant filling circuit. Examples thereof include those that exchange heat with the air around the refrigerant filling circuit.
また、例えば空気調和機の運転開始の前後など、タイミングに応じて冷媒を充填するための冷媒充填ポートを切り替えるためには、前記冷媒回路に冷媒を充填する回路を、前記第１の冷媒充填回路又は前記第２の冷媒充填回路に切り替え可能に構成されていることが好ましい。 Further, in order to switch the refrigerant filling port for filling the refrigerant according to the timing, for example, before and after the start of operation of the air conditioner, the circuit for filling the refrigerant circuit with the refrigerant is replaced with the first refrigerant filling circuit. Alternatively, it is preferable that the second refrigerant filling circuit is switchable.
前記冷媒充填装置は、前記第１の冷媒充填回路と、前記第２の冷媒充填回路と、を連通する、連通回路と、前記連通回路に設けられ、異物除去または劣化冷凍機油を取り除くためのフィルターとを更に備えることが好ましい。
このような構成であれば、連通回路に冷媒が流れるようにバルブ類を制御することで、異物除去や劣化冷凍機油の除去を行い、その結果、空気調和機の信頼性を向上させることができる。
The refrigerant filling device is a communication circuit that communicates the first refrigerant filling circuit and the second refrigerant filling circuit, and a filter provided in the communication circuit for removing foreign matter or deteriorated refrigerating machine oil. It is preferable to further provide.
With such a configuration, by controlling the valves so that the refrigerant flows through the communication circuit, foreign matter can be removed and deteriorated refrigerating machine oil can be removed, and as a result, the reliability of the air conditioner can be improved. ..
このように構成した本発明によれば、充填速度を向上させるとともに、コストを抑えつつも液戻りを防ぐことで、安価で信頼性の高い冷媒充填装置を提供することができる。 According to the present invention configured as described above, it is possible to provide an inexpensive and highly reliable refrigerant filling device by improving the filling speed and preventing liquid return while suppressing the cost.
以下に本発明の一実施形態における冷媒充填装置について図面を参照して説明する。 The refrigerant filling device according to the embodiment of the present invention will be described below with reference to the drawings.
本実施形態に係る冷媒充填装置１００は、例えば空気調和機Ｚの冷媒回路Ｘに冷媒を充填するためのものであり、図１に示すように、充填される冷媒の供給源である冷媒ボンベＢと、冷媒回路Ｘとの間に接続される冷媒充填機構１０と、この冷媒充填機構１０による冷媒充填動作を制御する制御機構２０とを備えている。なお、空気調和機Ｚは、圧縮機、室外熱交換器、及び膨張弁を有する室外機Ｚ１と、室内熱交換器を有する室内機Ｚ２と、室外機Ｚ１及び室内機Ｚ２を接続するとともに、液状の冷媒を搬送する液管Ｌ及びガス状の冷媒を搬送するガス管Ｇを有する冷媒回路Ｘとを備えたものである。ここでは、室外側に配置されて室外熱交換器を収容する１つの室外機Ｚ１に、室内側に配置されて室内熱交換器を収容する複数の室内機Ｚ２が接続されている。ただし、室外機Ｚ１は複数設けられていても良いし、室外機Ｚ１に接続される室内機Ｚ２は１つであっても良い。 The refrigerant filling device 100 according to the present embodiment is for filling the refrigerant circuit X of the air conditioner Z, for example, and as shown in FIG. 1, the refrigerant bomb B which is a supply source of the filled refrigerant. A refrigerant filling mechanism 10 connected to the refrigerant circuit X, and a control mechanism 20 for controlling the refrigerant filling operation by the refrigerant filling mechanism 10 are provided. The air conditioner Z connects an outdoor unit Z1 having a compressor, an outdoor heat exchanger, and an expansion valve, an indoor unit Z2 having an indoor heat exchanger, an outdoor unit Z1 and an indoor unit Z2, and is liquid. It is provided with a refrigerant circuit X having a liquid pipe L for transporting the refrigerant of the above and a gas pipe G for transporting a gaseous refrigerant. Here, a plurality of indoor units Z2 arranged on the indoor side and accommodating the indoor heat exchanger are connected to one outdoor unit Z1 arranged on the outdoor side and accommodating the outdoor heat exchanger. However, a plurality of outdoor units Z1 may be provided, or one indoor unit Z2 may be connected to the outdoor unit Z1.
＜冷媒充填機構＞
まず、冷媒充填機構１０について説明する。
冷媒充填機構１０は、図２に示すように、冷媒回路Ｘに接続される冷媒充填回路１１Ａと、冷媒充填回路１１Ａを収容する筐体１２とを備えている。
<Refrigerant filling mechanism>
First, the refrigerant filling mechanism 10 will be described.
As shown in FIG. 2, the refrigerant filling mechanism 10 includes a refrigerant filling circuit 11A connected to the refrigerant circuit X and a housing 12 accommodating the refrigerant filling circuit 11A.
冷媒充填回路１１Ａは、冷媒回路Ｘに接続されるとともに、冷媒回路Ｘに冷媒を充填する冷媒充填ポートＰａ１を有しており、冷媒の充填及びその停止を切り替える電磁弁等の開閉バルブＶ１が設けられている。ここでの冷媒充填回路１１Ａは、冷媒回路Ｘに接続されるとともに、充填される冷媒の供給源である冷媒ボンベＢに例えばマニホールドゲージＭを介して接続される冷媒吸入ポートＰｂ１をさらに有している。 The refrigerant filling circuit 11A is connected to the refrigerant circuit X, has a refrigerant filling port Pa1 for filling the refrigerant circuit X with the refrigerant, and is provided with an on-off valve V1 such as a solenoid valve for switching the filling and stopping of the refrigerant. Has been done. The refrigerant filling circuit 11A here further has a refrigerant suction port Pb1 connected to the refrigerant circuit X and connected to a refrigerant cylinder B which is a supply source of the filled refrigerant, for example, via a manifold gauge M. There is.
この冷媒充填回路１１Ａの冷媒充填ポートＰａ１は、図１に示すように、室外機Ｚ１及び室内機Ｚ２を接続する液管Ｌに接続されている。なお、冷媒充填ポートＰａ１は、チャージホースを介して液管Ｌに接続される。 As shown in FIG. 1, the refrigerant filling port Pa1 of the refrigerant filling circuit 11A is connected to the liquid pipe L connecting the outdoor unit Z1 and the indoor unit Z2. The refrigerant filling port Pa1 is connected to the liquid pipe L via a charge hose.
また、本実施形態の冷媒充填機構１０は、図１及び図２に示すように、上述した冷媒充填回路１１Ａ（以下、第１の冷媒充填回路１１Ａともいう）とは別に、室外機Ｚ１及び室内機Ｚ２を接続するガス管Ｇに接続される冷媒充填ポートＰａ２を有した第２の冷媒充填回路１１Ｂを備えている。なお、この冷媒充填ポートＰａ２も、チャージホースを介してガス管Ｇに接続される。 Further, as shown in FIGS. 1 and 2, the refrigerant filling mechanism 10 of the present embodiment has the outdoor unit Z1 and the indoor unit separately from the above-mentioned refrigerant filling circuit 11A (hereinafter, also referred to as the first refrigerant filling circuit 11A). A second refrigerant filling circuit 11B having a refrigerant filling port Pa2 connected to a gas pipe G connecting the machine Z2 is provided. The refrigerant filling port Pa2 is also connected to the gas pipe G via a charge hose.
この第２の冷媒充填回路１１Ｂは、第１の冷媒充填回路１１Ａと同様、冷媒吸入ポートＰｂ２及び開閉バルブＶ２を有しており、ここでは第２の冷媒充填回路１１Ｂを第１の冷媒充填回路１１Ａとは別の配管から構成してある。また、第２の冷媒充填回路１１Ｂに設けられた開閉バルブＶ２の口径は、第１の冷媒回路１１Ａの開閉バルブＶ１の口径よりも小さくしても良い。なお、第２の冷媒充填回路１１Ｂは、少なくとも冷媒充填ポートＰａ２が第１の冷媒充填回路１１Ａの冷媒充填ポートＰａ１とは別であれば良く、第２の冷媒充填回路１１Ｂを構成する配管の一部と、第１の冷媒充填回路１１Ａを構成する配管の一部とを共通化しても良い。以下、第１の冷媒回路１１Ａと第２の冷媒回路１１Ｂを明示的に区別しない場合は、第１の冷媒回路１１Ａまたは第２の冷媒回路１１Ｂを含む上位概念として、冷媒回路１１とも記す。同様に、開閉バルブＶ１または開閉バルブＶ２を含む上位概念として、開閉バルブＶとも記す。 Like the first refrigerant filling circuit 11A, the second refrigerant filling circuit 11B has a refrigerant suction port Pb2 and an on-off valve V2, and here, the second refrigerant filling circuit 11B is used as the first refrigerant filling circuit. It is composed of a pipe different from 11A. Further, the diameter of the opening / closing valve V2 provided in the second refrigerant filling circuit 11B may be smaller than the diameter of the opening / closing valve V1 of the first refrigerant circuit 11A. The second refrigerant filling circuit 11B may have at least the refrigerant filling port Pa2 different from the refrigerant filling port Pa1 of the first refrigerant filling circuit 11A, and is one of the pipes constituting the second refrigerant filling circuit 11B. The unit and a part of the piping constituting the first refrigerant filling circuit 11A may be shared. Hereinafter, when the first refrigerant circuit 11A and the second refrigerant circuit 11B are not explicitly distinguished, the refrigerant circuit 11 is also referred to as a superordinate concept including the first refrigerant circuit 11A or the second refrigerant circuit 11B. Similarly, as a superordinate concept including the on-off valve V1 or the on-off valve V2, it is also referred to as the on-off valve V.
筐体１２は、空気調和機Ｚとは別体のものであり、具体的には室外機Ｚ１の電装品箱ＣＢとは別体のものである。ここでの筐体１２は、把持部を備えた可搬型のものであり、この筐体１２の外壁を第１の冷媒充填回路１１Ａや第２の冷媒充填回路１１Ｂを構成する配管が貫通して、上述した各ポートが、筐体１２の外部に位置している。 The housing 12 is separate from the air conditioner Z, and specifically, is separate from the electrical component box CB of the outdoor unit Z1. The housing 12 here is a portable type having a grip portion, and the pipes constituting the first refrigerant filling circuit 11A and the second refrigerant filling circuit 11B penetrate through the outer wall of the housing 12. , Each of the above-mentioned ports is located outside the housing 12.
＜制御機構＞
次に、制御機構２０について説明する。
制御機構２０は、冷媒充填回路１１による冷媒充填動作を制御するものである。
<Control mechanism>
Next, the control mechanism 20 will be described.
The control mechanism 20 controls the refrigerant filling operation by the refrigerant filling circuit 11.
具体的に制御機構２０は、マイクロコンピュータやメモリ等を備え、図３に示すように、吐出過熱度算出部２１、過冷却度算出部２２、目標過冷却度格納部２３、バルブ制御部２４などとしての機能を発揮するものである。 Specifically, the control mechanism 20 includes a microcomputer, a memory, and the like, and as shown in FIG. 3, the discharge superheat degree calculation unit 21, the supercooling degree calculation unit 22, the target supercooling degree storage unit 23, the valve control unit 24, and the like. It exerts the function as.
この制御機構２０は、室外機Ｚ１の電装品箱ＣＢ内に収容されており、同電装品箱ＣＢ内に収容されて圧縮機や四方弁などを制御する制御部としての機能を発揮する。つまり、本実施形態では、空気調和機Ｚの動作を制御する制御部に、冷媒充填回路１１の動作を制御する機能を兼ね備えさせている。
また、空気調和機Ｚと冷媒充填装置１００とは、有線又は無線の通信手段を有し、これらの通信手段がインターネットを介して通信可能に構成されており、前記制御部の制御は、通信手段を介して得られた情報によって変更することが可能である。
The control mechanism 20 is housed in the electrical component box CB of the outdoor unit Z1 and is housed in the electrical component box CB to exert a function as a control unit for controlling a compressor, a four-way valve, and the like. That is, in the present embodiment, the control unit that controls the operation of the air conditioner Z is provided with a function of controlling the operation of the refrigerant filling circuit 11.
Further, the air conditioner Z and the refrigerant filling device 100 have wired or wireless communication means, and these communication means are configured to be able to communicate via the Internet, and the control of the control unit is controlled by the communication means. It is possible to change by the information obtained through.
以下、制御機構２０の各部について説明する。 Hereinafter, each part of the control mechanism 20 will be described.
吐出過熱度算出部２１は、圧縮機から吐出された冷媒の過熱度である吐出過熱度を算出するものである。この吐出過熱度は、圧縮機から吐出されたガス冷媒の温度と、そのガス冷媒の圧力における飽和温度との差である。 The discharge superheat degree calculation unit 21 calculates the discharge superheat degree, which is the superheat degree of the refrigerant discharged from the compressor. This discharge superheat degree is the difference between the temperature of the gas refrigerant discharged from the compressor and the saturation temperature at the pressure of the gas refrigerant.
本実施形態では、図４に示すように、冷媒回路Ｘにおける圧縮機Ｃの下流側に第１温度センサＴ１及び第１圧力センサＰ１を設けてある。具体的には、圧縮機ＣとオイルセパレータＯＳとの間に第１温度センサＴ１が設けられており、オイルセパレータＯＳと室外熱交換器Ｈとの間に第１圧力センサＰ１が設けられている。そして、吐出過熱度算出部２１は、第１温度センサＴ１により検出された冷媒温度と、第１圧力センサＰ１により検出された冷媒圧力とに基づいて、吐出過熱度を算出する。 In the present embodiment, as shown in FIG. 4, a first temperature sensor T1 and a first pressure sensor P1 are provided on the downstream side of the compressor C in the refrigerant circuit X. Specifically, the first temperature sensor T1 is provided between the compressor C and the oil separator OS, and the first pressure sensor P1 is provided between the oil separator OS and the outdoor heat exchanger H. .. Then, the discharge superheat degree calculation unit 21 calculates the discharge superheat degree based on the refrigerant temperature detected by the first temperature sensor T1 and the refrigerant pressure detected by the first pressure sensor P1.
過冷却度算出部２２は、室外熱交換器Ｈを通過した冷媒の温度及び圧力に基づいて過冷却度である過冷却度を算出する。この過冷却度は、凝縮器たる室外熱交換器Ｈを通過した後の液冷媒の温度と、その液冷媒の圧力における飽和温度との差であり、冷媒充填量が多いほど高くなる。なお、室外熱交換器Ｈにおける冷媒の凝縮は圧力損失が小さいため、室外熱交換器Ｈに流入する前の液冷媒の圧力と、室外熱交換器Ｈを通過した後の液冷媒の圧力とは互いに等しいとみなしてもよい。 The supercooling degree calculation unit 22 calculates the supercooling degree, which is the supercooling degree, based on the temperature and pressure of the refrigerant that has passed through the outdoor heat exchanger H. This degree of supercooling is the difference between the temperature of the liquid refrigerant after passing through the outdoor heat exchanger H, which is a condenser, and the saturation temperature at the pressure of the liquid refrigerant, and increases as the amount of refrigerant charged increases. Since the pressure loss of the refrigerant condensed in the outdoor heat exchanger H is small, the pressure of the liquid refrigerant before flowing into the outdoor heat exchanger H and the pressure of the liquid refrigerant after passing through the outdoor heat exchanger H are different. They may be considered equal to each other.
本実施形態では、図４に示すように、室外熱交換器Ｈの下流にサブクーラＳＣＬを設けてあり、さらにその下流に第２温度センサＴ２を設けてある。そして、過冷却度算出部２２は、第２温度センサＴ２により検出された冷媒温度と、上述した第１圧力センサＰ１により検出された冷媒圧力に基づいて、過冷却度を算出する。 In the present embodiment, as shown in FIG. 4, a subcooler SCL is provided downstream of the outdoor heat exchanger H, and a second temperature sensor T2 is further downstream thereof. Then, the supercooling degree calculation unit 22 calculates the supercooling degree based on the refrigerant temperature detected by the second temperature sensor T2 and the refrigerant pressure detected by the first pressure sensor P1 described above.
目標過冷却度格納部２３は、過冷却度算出部２２により算出された過冷却度（以下、算出過冷却度という）の目標値（以下、目標過冷却度という）と、室外温度、室内温度、又は配管長の少なくとも１つとの相関を示す相関データが格納されている。 The target supercooling degree storage unit 23 includes a target value (hereinafter referred to as a target supercooling degree) of the supercooling degree (hereinafter referred to as a calculated supercooling degree) calculated by the supercooling degree calculation unit 22, an outdoor temperature, and an indoor temperature. , Or correlation data showing the correlation with at least one of the pipe lengths is stored.
具体的にこの相関データは、室外温度、室内温度、又は配管長の少なくとも１つをパラメータとして目標過冷却度を求めるためのものであり、例えばルックアップテーブルや算出式などである。なお、予め定めた目標過冷却度の値そのものを目標過冷却度格納部２３に格納しても良い。 Specifically, this correlation data is for obtaining the target supercooling degree with at least one of the outdoor temperature, the indoor temperature, and the pipe length as a parameter, for example, a look-up table or a calculation formula. The predetermined target supercooling degree value itself may be stored in the target supercooling degree storage unit 23.
バルブ制御部２４は、少なくとも冷媒充填回路１１の開閉バルブＶを制御するものであり、具体的には過冷却度算出部２２により算出された算出過冷却度が目標過冷却度に近づくように、開閉バルブＶを所定開度の開状態か、閉状態かの何れかに択一的に制御する。また、バルブ制御部２４は、算出過冷却度と目標過冷却度との差から冷媒量を検知するための冷媒量検知部としての機能を備えており、検出した冷媒量に基づいて、開閉バルブＶを制御するように構成されている。 The valve control unit 24 controls at least the opening / closing valve V of the refrigerant filling circuit 11, and specifically, the calculated supercooling degree calculated by the supercooling degree calculation unit 22 approaches the target supercooling degree. The on-off valve V is selectively controlled to either the open state or the closed state of a predetermined opening degree. Further, the valve control unit 24 has a function as a refrigerant amount detecting unit for detecting the amount of refrigerant from the difference between the calculated supercooling degree and the target supercooling degree, and the opening / closing valve is based on the detected amount of refrigerant. It is configured to control V.
そして、本実施形態のバルブ制御部２４は、吐出過熱度算出部２１により算出された吐出過熱度をも開閉バルブＶの制御に用いており、具体的には、吐出過熱度の下限値として予め設定した閾値と、算出された吐出過熱度とを比較して、開閉バルブＶを制御する。なお、この閾値は、閾値格納部２５に格納されており、少なくとも圧縮機への液戻りが発生しない吐出過熱度の値である。 The valve control unit 24 of the present embodiment also uses the discharge superheat degree calculated by the discharge superheat degree calculation unit 21 for controlling the opening / closing valve V, and specifically, as a lower limit value of the discharge superheat degree in advance. The on-off valve V is controlled by comparing the set threshold value with the calculated discharge superheat degree. It should be noted that this threshold value is stored in the threshold value storage unit 25, and is at least a value of the degree of discharge superheat that does not cause liquid return to the compressor.
このように構成された冷媒充填装置１００を用いて、空気調和機Ｚの冷媒回路Ｘに冷媒を充填する動作について、図５のフローチャートを参照しながら説明する。 The operation of filling the refrigerant circuit X of the air conditioner Z with the refrigerant by using the refrigerant filling device 100 configured in this way will be described with reference to the flowchart of FIG.
まず、施工者が、室外機に収容された制御機構２０を、オートチャージモードに設定する（Ｔ１）。 First, the builder sets the control mechanism 20 housed in the outdoor unit to the auto charge mode (T1).
これにより、冷媒充填機構１０は、空気調和機Ｚの運転前に、一定時間開閉バルブＶ１を開くことによって、液管Ｌに一定時間冷媒を封入するプレチャージを実施する（Ｔ２）。 As a result, the refrigerant filling mechanism 10 precharges the liquid pipe L with the refrigerant for a certain period of time by opening the open / close valve V1 for a certain period of time before the operation of the air conditioner Z (T2).
次に、施工者が、室外機Ｚ１のガス管Ｇ側のサービスバルブと、液管Ｌ側のサービスバルブとを手動で全開にする。その後、空気調和機Ｚは冷房運転を開始する（Ｔ３）。なお、ここでいうサービスバルブとは、ガス管Ｇや液管Ｌから冷媒を充填可能とする開状態と、その充填を停止する閉状態とに切り替わるものである。 Next, the builder manually fully opens the service valve on the gas pipe G side and the service valve on the liquid pipe L side of the outdoor unit Z1. After that, the air conditioner Z starts the cooling operation (T3). The service valve referred to here is switched between an open state in which the refrigerant can be filled from the gas pipe G and the liquid pipe L and a closed state in which the filling is stopped.
冷房運転が安定してから、フィードバック制御による充填動作が開始される。具体的には、開閉バルブＶ２の開閉を繰り返す（Ｔ４）。 After the cooling operation becomes stable, the filling operation by feedback control is started. Specifically, the opening / closing valve V2 is repeatedly opened / closed (T4).
そして、算出過冷却度と目標過冷却度との差に基づいて、開閉バルブＶ２の開閉時間が変更される（Ｔ５）。 Then, the opening / closing time of the opening / closing valve V2 is changed based on the difference between the calculated supercooling degree and the target supercooling degree (T5).
その後、算出過冷却度が目標過冷却度に一致したかを判断し（Ｔ６）、一致した場合に充填動作が終了する。 After that, it is determined whether the calculated supercooling degree matches the target supercooling degree (T6), and if it matches, the filling operation ends.
ここで、上述したフィードバック制御以降の動作を詳述する。
まず、フィードバック制御が開始されると、バルブ制御部２４が、第２の冷媒充填回路１１Ｂの開閉バルブＶ２の開閉を所定の時間間隔で開閉を繰り返す。なお、このとき第１の冷媒充填回路１１Ａの開閉バルブＶ１は閉状態である。
Here, the operation after the feedback control described above will be described in detail.
First, when the feedback control is started, the valve control unit 24 repeats opening and closing of the opening / closing valve V2 of the second refrigerant filling circuit 11B at predetermined time intervals. At this time, the on-off valve V1 of the first refrigerant filling circuit 11A is in the closed state.
図６に示すように、算出過冷却度と目標過冷却度との差が所定の値よりも大きいときは、所定の開時間（以下、初期開時間という）と、所定の閉時間（以下、初期閉時間という）とが交互に繰り返されるようにしてある。開閉バルブＶ２が開状態のときは、冷媒が充填されることで吐出過熱度が減少し、開閉バルブＶ２が閉状態のときは、冷媒の充填が停止されることで吐出過熱度が増加する。 As shown in FIG. 6, when the difference between the calculated supercooling degree and the target supercooling degree is larger than the predetermined value, the predetermined opening time (hereinafter referred to as the initial opening time) and the predetermined closing time (hereinafter referred to as the initial opening time) The initial closing time) is repeated alternately. When the on-off valve V2 is in the open state, the discharge superheat degree is reduced by filling with the refrigerant, and when the on-off valve V2 is in the closed state, the discharge superheat degree is increased by stopping the filling of the refrigerant.
本実施形態では、吐出過熱度の下限値を予め閾値として設定してあり、図６に示すように、吐出過熱度算出部２１により算出された吐出過熱度が閾値以下になると、バルブ制御部２４が、上述した時間間隔に関わらず、開閉バルブＶ２を閉じる。 In the present embodiment, the lower limit value of the discharge superheat degree is set in advance as a threshold value, and as shown in FIG. 6, when the discharge superheat degree calculated by the discharge superheat degree calculation unit 21 becomes equal to or less than the threshold value, the valve control unit 24 However, the on-off valve V2 is closed regardless of the time interval described above.
前記バルブ制御部２４は、吐出過熱度が閾値を下回っていない場合であっても、吐出過熱度が、所定の閾値より大きい変化率で減少した場合に、開閉バルブＶ２を閉じてもよい。 The valve control unit 24 may close the opening / closing valve V2 even when the discharge superheat degree does not fall below the threshold value, when the discharge superheat degree decreases at a rate of change larger than a predetermined threshold value.
また、バルブ制御部２４は、算出過冷却度と目標過冷却度とを比較して開閉バルブＶ２を制御するように構成されている。具体的には、算出過冷却度と目標過冷却度との差が所定値以下になった場合に、開閉バルブＶ２の開時間を初期開時間よりも短い終盤開時間に変更する。
このとき、算出過冷却度と目標過冷却度との差に比例して、開時間を短くし、又は、閉時間を長くしても良い。この実施形態では、算出過冷却度及び目標過冷却度の差と比較する所定値が１つ設定されているが、複数の所定値を段階的に設定しておき、初期開時間よりも短い第１終盤開時間、第１終盤開時間よりもさらに短い第２終盤開時間など、終盤開時間を段階的に変更するようにしても良い。また、終盤動作モードにおける閉時間は、初期閉時間から変更しなくても良いし、初期閉時間よりも長く或いは短くしても良い。
Further, the valve control unit 24 is configured to control the on-off valve V2 by comparing the calculated supercooling degree with the target supercooling degree. Specifically, when the difference between the calculated supercooling degree and the target supercooling degree becomes a predetermined value or less, the opening time of the opening / closing valve V2 is changed to the final opening time shorter than the initial opening time.
At this time, the opening time may be shortened or the closing time may be lengthened in proportion to the difference between the calculated supercooling degree and the target supercooling degree. In this embodiment, one predetermined value to be compared with the difference between the calculated supercooling degree and the target supercooling degree is set, but a plurality of predetermined values are set stepwise and shorter than the initial opening time. The final opening time may be changed stepwise, such as 1 final opening time and 2nd final opening time shorter than the 1st final opening time. Further, the closing time in the final operation mode may not be changed from the initial closing time, and may be longer or shorter than the initial closing time.
その後、バルブ制御部２４は、算出過冷却度と目標過冷却度との差が所定の許容範囲内に収まったか否かを判断し、算出過冷却度と目標過冷却度との差が所定の許容範囲内に収まった場合には、開閉バルブＶ２を閉状態に維持する。これにより、冷媒充填動作は終了する。 After that, the valve control unit 24 determines whether or not the difference between the calculated supercooling degree and the target supercooling degree is within a predetermined allowable range, and the difference between the calculated supercooling degree and the target supercooling degree is predetermined. If it falls within the permissible range, the open / close valve V2 is maintained in the closed state. As a result, the refrigerant filling operation is completed.
以上のように構成された冷媒充填装置１００によれば、吐出過熱度に基づいて開閉バルブＶ２を制御するので、吐出過熱度を高く確保できている場合には、開閉バルブＶ２を開いたまま冷媒を例えば一定時間充填し続けることで、充填速度の向上を図れる。
一方、この一定時間内に吐出過熱度が所定の閾値を下回った場合には、開閉バルブＶ２を閉じて冷媒の充填を停止するので、液戻りが発生を防ぐことができる。
このように、本実施形態に係る冷媒充填装置１００によれば、開閉バルブＶ２を利用した安価な構成でありつつも、充填速度を向上させることができ、なおかつ液戻りを防ぐことにより、信頼性を担保することができる。
According to the refrigerant filling device 100 configured as described above, the on-off valve V2 is controlled based on the discharge superheat degree. Therefore, when the discharge superheat degree can be secured high, the refrigerant is kept open with the on-off valve V2 open. For example, the filling speed can be improved by continuing to fill for a certain period of time.
On the other hand, when the discharge superheat degree falls below a predetermined threshold value within this fixed time, the on-off valve V2 is closed to stop the filling of the refrigerant, so that the liquid return can be prevented.
As described above, according to the refrigerant filling device 100 according to the present embodiment, the filling speed can be improved and the liquid return is prevented, so that the reliability can be improved even though the structure is inexpensive by using the on-off valve V2. Can be secured.
ここで、冷媒の充填開始後、吐出過熱度が閾値に到るまでは、開閉バルブＶ２を開き続けると、開閉バルブＶ２の制御の応答性を速くしなければ、液戻りが発生する恐れがある。しかし、開閉バルブＶ２の制御の応答性を速くすると、装置としては高価なものとなる。
これに対して、本実施形態では、冷媒の充填開始後、前記過冷却度が前記目標過冷却度よりも小さい間においては、所定の時間間隔でバルブの開閉を繰り返すように構成されている。その後、吐出過熱度が閾値以下になった場合に、バルブ制御部２４が、前記所定の時間間隔に関わらず、開閉バルブＶ２を閉じる。
このような構成であれば、装置を安価な構成にしつつも、充填速度を可及的に向上させることができ、なおかつ液戻りを確実に防ぐことができる。
Here, if the on-off valve V2 is continuously opened after the start of filling the refrigerant until the discharge superheat degree reaches the threshold value, liquid return may occur unless the control response of the on-off valve V2 is increased. .. However, if the control response of the on-off valve V2 is increased, the device becomes expensive.
On the other hand, in the present embodiment, after the start of filling with the refrigerant, the valve is repeatedly opened and closed at predetermined time intervals while the supercooling degree is smaller than the target supercooling degree. After that, when the discharge superheat degree becomes equal to or lower than the threshold value, the valve control unit 24 closes the open / close valve V2 regardless of the predetermined time interval.
With such a configuration, the filling speed can be improved as much as possible while the apparatus can be inexpensively configured, and the liquid can be reliably prevented from returning.
さらに、バルブ制御部２４が、算出過冷却度が目標過冷却度に近づくように開閉バルブＶ２を制御するので、冷媒回路Ｘに所望の冷媒量が流れるように、冷媒を充填していくことができる。 Further, since the valve control unit 24 controls the on-off valve V2 so that the calculated supercooling degree approaches the target supercooling degree, it is possible to fill the refrigerant circuit X with the refrigerant so that the desired amount of the refrigerant flows. it can.
加えて、目標過冷却度が、室外温度、室内温度、又は配管長の少なくとも１つをパラメータとして定められているので、種々の環境に応じた適切な冷媒量に基づいて、適切な目標過冷却度を設定することができる。 In addition, since the target supercooling degree is set with at least one of the outdoor temperature, the indoor temperature, or the pipe length as a parameter, an appropriate target supercooling is performed based on an appropriate amount of refrigerant according to various environments. The degree can be set.
制御機構２０が、室外機Ｚ１に収容されており、圧縮機などを制御する制御部に開閉バルブＶ１、Ｖ２の制御を担わせているので、開閉バルブＶ１、Ｖ２を制御するための専用の制御部は不要であり、装置をより安価でよりシンプルな構成にすることができる。 Since the control mechanism 20 is housed in the outdoor unit Z1 and the control unit that controls the compressor or the like is responsible for controlling the on-off valves V1 and V2, it is a dedicated control for controlling the on-off valves V1 and V2. No parts are required, and the device can be made cheaper and simpler.
なお、本発明は前記実施形態に限られるものではない。 The present invention is not limited to the above embodiment.
例えば、第１の冷媒充填回路１１Ａと第２の冷媒充填回路１１Ｂのうち、いずれか一方のみを用いても良い。 For example, only one of the first refrigerant filling circuit 11A and the second refrigerant filling circuit 11B may be used.
また、空気調和機Ｚとしては、配管長又は室内機台数を含む設置条件を記憶するための記憶部を備えており、冷媒充填機構１０は、第１の冷媒充填ポートＰａ２から冷媒を充填するときに、所定の運転前充填時間だけ、開閉バルブＶ１を開放するように構成されていても良い。また、この運転前充填時間は、前記記憶部の情報及び室外温度によって可変であることが好ましい。 Further, the air conditioner Z is provided with a storage unit for storing installation conditions including the pipe length or the number of indoor units, and the refrigerant filling mechanism 10 is used when filling the refrigerant from the first refrigerant filling port Pa2. In addition, the opening / closing valve V1 may be opened for a predetermined pre-operation filling time. Further, it is preferable that the pre-operation filling time is variable depending on the information in the storage unit and the outdoor temperature.
以下に、本発明のその他の実施形態における冷媒充填装置について図面を参照して説明する。
冷媒充填機構１０は、図７に示すように、冷媒回路Ｘに充填する冷媒を減圧する減圧手段３０を備えていても良い。
ここでの減圧手段３０は、冷媒充填回路１１の一部を構成するキャピラリー管であるが、例えば、冷媒充填回路１１に設けた膨張弁を減圧手段３０として用いることもできる。
The refrigerant filling device according to another embodiment of the present invention will be described below with reference to the drawings.
As shown in FIG. 7, the refrigerant filling mechanism 10 may include a pressure reducing means 30 for reducing the pressure of the refrigerant charged in the refrigerant circuit X.
The decompression means 30 here is a capillary pipe forming a part of the refrigerant filling circuit 11, but for example, an expansion valve provided in the refrigerant filling circuit 11 can be used as the decompression means 30.
さらに、冷媒充填機構１０は、図８に示すように、冷媒回路Ｘに充填する冷媒を加熱する加熱手段４０を備えていても良い。
ここでの加熱手段４０は、冷媒充填回路１１を流れる冷媒と、冷媒充填回路１１の周囲の空気との間で熱交換させるものである。具体的にこの加熱手段４０は、上述した減圧手段３０により減圧した後の冷媒が流れる熱交換器であり、減圧して低温になった冷媒が、この熱交換器を流れることで、冷媒充填回路１１の周囲の空気との間で熱交換するように構成されている。この加熱手段４０は、熱交換器に送風するファンＦをさらに備えており、送風による熱交換効率の向上を図っている。
なお、加熱手段４０としては、例えば、冷媒充填回路１１を流れる冷媒と、冷媒回路Ｘを流れる高温冷媒との間で熱交換させるものであっても良いし、冷媒充填回路１１を流れる冷媒を加熱するヒータを利用したものであっても良い。このような構成であれば、必ずしも減圧手段３０を設ける必要はない。
Further, as shown in FIG. 8, the refrigerant filling mechanism 10 may include a heating means 40 for heating the refrigerant to be filled in the refrigerant circuit X.
The heating means 40 here is for exchanging heat between the refrigerant flowing through the refrigerant filling circuit 11 and the air around the refrigerant filling circuit 11. Specifically, the heating means 40 is a heat exchanger through which the refrigerant after being decompressed by the decompression means 30 described above flows, and the refrigerant whose temperature has been reduced to a low temperature flows through the heat exchanger to fill the refrigerant filling circuit. It is configured to exchange heat with the surrounding air of 11. The heating means 40 is further provided with a fan F for blowing air to the heat exchanger, in order to improve the heat exchange efficiency by blowing air.
The heating means 40 may be, for example, one that exchanges heat between the refrigerant flowing through the refrigerant filling circuit 11 and the high-temperature refrigerant flowing through the refrigerant circuit X, or heats the refrigerant flowing through the refrigerant filling circuit 11. It may be the one using the heater. With such a configuration, it is not always necessary to provide the decompression means 30.
図７や図８に示したように、減圧手段３０や加熱手段４０を設けて、冷媒ボンベＢの冷媒を減圧及び／又は加熱して充填することで、図９に示すように、冷媒ボンベＢの冷媒をそのまま充填する場合に比べて、圧縮機の吸入側の冷媒をよりガス化することができ、圧縮機の信頼性を損なうことなく、充填速度のさらなる向上を図れる。 As shown in FIGS. 7 and 8, the refrigerant cylinder B is provided with the depressurizing means 30 and the heating means 40, and the refrigerant in the refrigerant cylinder B is depressurized and / or heated and filled, so as shown in FIG. Compared with the case of filling the refrigerant as it is, the refrigerant on the suction side of the compressor can be further gasified, and the filling speed can be further improved without impairing the reliability of the compressor.
ところで、室外温度が低い場合に冷媒を多量に充填すると、冷媒回路Ｘのうち本来でばれ液冷媒が溜まらない部分（例えば、圧縮機の吸入側のガス配管やアキュムレータなど）に液冷媒が溜まってしまい、冷媒回路Ｘ内の冷媒量と過冷却度との特性が崩れ、冷媒の充填精度が低下する。
そこで、バルブ制御部２４は、室外温度を取得して、それらの温度に基づいて開閉バルブＶの開時間又は閉時間を変更するように構成されていても良い。
具体的には、室外温度が低いほど、開閉バルブＶの開時間を短くする、又は、開閉バルブＶの閉時間を長くする実施態様を挙げることができる。
By the way, when a large amount of refrigerant is filled when the outdoor temperature is low, the liquid refrigerant collects in the part of the refrigerant circuit X where the liquid refrigerant does not originally collect (for example, the gas pipe or accumulator on the suction side of the compressor). As a result, the characteristics of the amount of refrigerant and the degree of supercooling in the refrigerant circuit X are destroyed, and the filling accuracy of the refrigerant is lowered.
Therefore, the valve control unit 24 may be configured to acquire the outdoor temperature and change the opening time or closing time of the on-off valve V based on those temperatures.
Specifically, the lower the outdoor temperature, the shorter the opening time of the opening / closing valve V, or the longer the closing time of the opening / closing valve V can be mentioned.
前記実施形態のバルブ制御部２４は、算出された吐出過熱度と閾値とを比較して開閉バルブＶを制御するように構成されていたが、算出された吐出過熱度が閾値を下回っていない場合であっても、算出された吐出過熱度の時間変化率（減少率）に基づいて開閉バルブＶを制御するようにしても良い。
具体的には、吐出過熱度の減少率が所定の閾値よりも大きい場合に、開閉バルブＶの開時間を短くする、又は、開閉バルブＶの閉時間を長くする実施態様を挙げることができる。
The valve control unit 24 of the above embodiment is configured to control the on-off valve V by comparing the calculated discharge superheat degree with the threshold value, but the calculated discharge superheat degree is not lower than the threshold value. Even so, the on-off valve V may be controlled based on the calculated rate of change over time (decrease rate) of the degree of discharge superheat.
Specifically, when the reduction rate of the discharge superheat degree is larger than a predetermined threshold value, an embodiment in which the opening time of the on-off valve V is shortened or the closing time of the on-off valve V is lengthened can be mentioned.
また、前記実施形態のバルブ制御部２４は、算出過冷却度と目標過冷却度との差分に基づいて開閉バルブＶを制御していたが、算出過冷却度の時間変化率（増加率）に基づいて開閉バルブＶを制御しても良い。
具体的には、吐出過熱度の増加率の絶対値が所定値よりも大きい場合に、開閉バルブＶの開時間を短くする、又は、開閉バルブＶの閉時間を長くする実施態様を挙げることができる。
Further, the valve control unit 24 of the above-described embodiment controls the opening / closing valve V based on the difference between the calculated supercooling degree and the target supercooling degree, but the time change rate (increase rate) of the calculated supercooling degree is used. The opening / closing valve V may be controlled based on the control.
Specifically, when the absolute value of the increase rate of the discharge superheat degree is larger than a predetermined value, the opening time of the on-off valve V is shortened or the closing time of the on-off valve V is lengthened. it can.
さらに、前記実施形態の吐出過熱度算出部２１は、吐出過熱度を算出していたが、吐出過熱度の代わり或いは吐出過熱度に加えて、圧縮機に吸入される冷媒の過熱度である過熱度を算出するものであっても良い。
この場合、バルブ制御部２４は、算出された過熱度が所定の閾値を下回った場合に開閉バルブＶを閉じるように構成されていても良い。
Further, the discharge superheat degree calculation unit 21 of the above-described embodiment has calculated the discharge superheat degree, but instead of the discharge superheat degree or in addition to the discharge superheat degree, the superheat degree which is the superheat degree of the refrigerant sucked into the compressor. It may be used to calculate the degree.
In this case, the valve control unit 24 may be configured to close the on-off valve V when the calculated degree of superheat falls below a predetermined threshold value.
そのうえ、冷媒充填装置１００は、第１の冷媒充填回路１１Ａ及び第２の冷媒充填回路１１Ｂを連通する連通回路と、連通回路に設けられ、異物除去または劣化冷凍機油を取り除くためのフィルターと、連通回路に設けられ、連通回路を開閉するための連通用開閉バルブをさらに備えていても良い。
このような構成であれば、連通回路に冷媒が流れるように連通用開閉バルブを制御することで、異物除去や劣化冷凍機油の除去を行い、その結果、空気調和機Ｚの信頼性を向上させることができる。
Further, the refrigerant filling device 100 communicates with a communication circuit that communicates the first refrigerant filling circuit 11A and the second refrigerant filling circuit 11B, and a filter provided in the communication circuit for removing foreign matter or deteriorated refrigerating machine oil. An on-off valve for communication which is provided in the circuit and for opening and closing the communication circuit may be further provided.
With such a configuration, by controlling the communication open / close valve so that the refrigerant flows through the communication circuit, foreign matter can be removed and deteriorated refrigerating machine oil can be removed, and as a result, the reliability of the air conditioner Z is improved. be able to.
その他、本発明は前記実施形態に限られず、その趣旨を逸脱しない範囲で種々の変形が可能であるのは言うまでもない。 In addition, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.
Ｚ ・・・空気調和機
Ｚ１ ・・・室外機
Ｚ２ ・・・室内機
１００・・・冷媒充填装置
Ｂ ・・・冷媒ボンベ
１０ ・・・冷媒充填機構
２０ ・・・制御機構
１１Ａ、１１Ｂ・・・冷媒充填回路
１２ ・・・筐体
Ｖ１、Ｖ２ ・・・開閉バルブ
２１ ・・・吐出過熱度算出部
２２ ・・・過冷却度算出部
２３ ・・・目標過冷却度格納部
２４ ・・・バルブ制御部
Z ・ ・ ・ Air conditioner Z1 ・ ・ ・ Outdoor unit Z2 ・ ・ ・ Indoor unit 100 ・ ・ ・ Refrigerant filling device B ・ ・ ・ Refrigerant valve 10 ・ ・ ・ Refrigerant filling mechanism 20 ・ ・ ・ Control mechanisms 11A, 11B ...・ Refrigerant filling circuit 12 ・ ・ ・ Housing V1, V2 ・ ・ ・ Open / close valve 21 ・ ・ ・ Discharge supercooling degree calculation unit 22 ・ ・ ・ Supercooling degree calculation unit 23 ・ ・ ・ Target supercooling degree storage unit 24 ・ ・ ・Valve control unit
Claims (25)
前記冷媒回路に接続される冷媒充填ポートを有した冷媒充填回路と、
前記冷媒充填回路に設けられた開閉バルブと、
前記開閉バルブを制御する制御機構とを具備し、
前記制御機構が、前記圧縮機から吐出側の冷媒温度及び冷媒圧力から冷媒の吐出過熱度を算出する吐出過熱度算出部と、
前記吐出過熱度算出部により算出された吐出過熱度に基づいて、前記開閉バルブの開閉状態を制御するバルブ制御部とを備えることを特徴とする冷媒充填装置。 A liquid pipe that connects an outdoor unit having a compressor, an outdoor heat exchanger, and an expansion valve, an indoor unit having an indoor heat exchanger, the outdoor heat exchanger, and the indoor heat exchanger, and conveys a liquid refrigerant. A refrigerant filling device that fills an air exchanger equipped with a refrigerant circuit having a gas pipe for transporting a gaseous refrigerant.
A refrigerant filling circuit having a refrigerant filling port connected to the refrigerant circuit,
An on-off valve provided in the refrigerant filling circuit and
A control mechanism for controlling the on-off valve is provided.
The control mechanism includes a discharge superheat calculation unit that calculates the discharge superheat degree of the refrigerant from the refrigerant temperature and the refrigerant pressure on the discharge side from the compressor.
A refrigerant filling device including a valve control unit that controls an open / closed state of the on-off valve based on the discharge superheat degree calculated by the discharge superheat degree calculation unit.
冷媒量を検知するための冷媒量検知部をさらに備え、
前記バルブ制御部が、前記冷媒量検知部の検知結果に基づいて、前記開閉バルブを制御することを特徴とする請求項１乃至３のうち何れか一項に記載の冷媒充填装置。 The control mechanism
Further equipped with a refrigerant amount detection unit for detecting the amount of refrigerant,
The refrigerant filling device according to any one of claims 1 to 3, wherein the valve control unit controls the on-off valve based on the detection result of the refrigerant amount detecting unit.
前記室外熱交換器の出口側の冷媒温度と冷媒圧力とから冷媒の過冷却度を算出される過冷却度算出部を備え、
前記冷媒量検知部が、前記過冷却度と予め設定された目標過冷却度との差から、冷媒量を検知することを特徴とする請求項４記載の冷媒充填装置。 The control mechanism
A supercooling degree calculation unit for calculating the supercooling degree of the refrigerant from the refrigerant temperature and the refrigerant pressure on the outlet side of the outdoor heat exchanger is provided.
The refrigerant filling device according to claim 4, wherein the refrigerant amount detecting unit detects the amount of refrigerant from the difference between the degree of supercooling and a preset target degree of supercooling.
前記過冷却度と前記目標過冷却度との差が所定の値よりも大きい場合に、前記開放時間を長くし、又は、前記閉鎖時間を短くし、
前記過冷却度と前記目標過冷却度との差が所定の値よりも小さい場合に、前記開放時間を短くし、又は、前記閉鎖時間を長くすることを特徴とする請求項７記載の冷媒充填装置。 The valve control unit
When the difference between the supercooling degree and the target supercooling degree is larger than a predetermined value, the opening time is lengthened or the closing time is shortened.
The refrigerant filling according to claim 7, wherein when the difference between the supercooling degree and the target supercooling degree is smaller than a predetermined value, the opening time is shortened or the closing time is lengthened. apparatus.
前記冷媒充填装置は、
前記空気調和機が運転前に停止しているときに、前記第１の冷媒充填ポートから冷媒を充填し、
前記空気調和機が、前記室外熱交換器が凝縮器として機能するとともに、前記室内熱交換器が蒸発器として機能する冷媒充填運転を行うときに、前記第２の冷媒充填ポートから冷媒を充填することを特徴とする請求項１乃至１１のうち何れか一項に記載の冷媒充填装置。 The outdoor unit includes a first refrigerant filling port provided on the liquid pipe side and a second refrigerant filling port provided on the gas pipe side.
The refrigerant filling device is
When the air conditioner is stopped before operation, the refrigerant is filled from the first refrigerant filling port.
When the air conditioner performs a refrigerant filling operation in which the outdoor heat exchanger functions as a condenser and the indoor heat exchanger functions as an evaporator, the refrigerant is filled from the second refrigerant filling port. The refrigerant filling device according to any one of claims 1 to 11, characterized in that.
前記冷媒充填装置は、
前記第１の冷媒充填ポートから冷媒を充填するときに、所定の運転前充填時間だけ、前記開閉バルブを開放するように構成されており、
前記運転前充填時間は、前記記憶部の情報及び室外温度によって可変であることを特徴とする請求項１２記載の冷媒充填装置。 The air conditioner includes a storage unit for storing installation conditions including the pipe length or the number of indoor units.
The refrigerant filling device is
When the refrigerant is filled from the first refrigerant filling port, the on-off valve is opened for a predetermined pre-operation filling time.
The refrigerant filling device according to claim 12, wherein the pre-operation filling time is variable depending on the information in the storage unit and the outdoor temperature.
前記第１の冷媒充填ポートに冷媒を充填するための、第１の冷媒充填回路と、
前記第２の冷媒充填ポートに冷媒を充填するための、第２の冷媒充填回路と、を備えることを特徴とする請求項１２又は１３記載の冷媒充填装置。 The refrigerant filling device is
A first refrigerant filling circuit for filling the first refrigerant filling port with refrigerant,
The refrigerant filling device according to claim 12 or 13, further comprising a second refrigerant filling circuit for filling the second refrigerant filling port with refrigerant.
前記第２の冷媒充填回路は、充填される冷媒の流れを制御するための第２の開閉バルブを有し、
前記第１の開閉バルブの口径が、前記第２の開閉バルブの口径より大きいことを特徴とする請求項１４記載の冷媒充填装置。 The first refrigerant filling circuit has a first on-off valve for controlling the flow of the filled refrigerant.
The second refrigerant filling circuit has a second on-off valve for controlling the flow of the filled refrigerant.
The refrigerant filling device according to claim 14, wherein the diameter of the first on-off valve is larger than the diameter of the second on-off valve.
前記第１の冷媒充填回路と、前記第２の冷媒充填回路と、を連通する、連通回路と、
前記連通回路に設けられ、異物除去または劣化冷凍機油を取り除くためのフィルターとを更に備えることを特徴とする請求項１４記載の冷媒充填装置。 The refrigerant filling device is
A communication circuit that communicates the first refrigerant filling circuit and the second refrigerant filling circuit.
The refrigerant filling device according to claim 14, further comprising a filter for removing foreign matter or deteriorated refrigerating machine oil, which is provided in the communication circuit.
前記冷媒充填装置は、前記冷媒充填回路が前記空気調和機と別体の筐体に収容されたものであり、
前記バルブ制御部は、前記空気調和機の前記制御部と兼用されており、
前記空気調和機と前記冷媒充填装置とが、有線又は無線で、互いに通信するための通信手段を有し、
前記通信手段を介して、前記開閉バルブが制御されることを特徴とする請求項１乃至１７のうち何れか一項に記載の冷媒充填装置。 The air conditioner includes a control unit for performing a cooling operation or a heating operation.
In the refrigerant filling device, the refrigerant filling circuit is housed in a housing separate from the air conditioner.
The valve control unit is also used as the control unit of the air conditioner.
The air conditioner and the refrigerant filling device have a communication means for communicating with each other by wire or wirelessly.
The refrigerant filling device according to any one of claims 1 to 17, wherein the on-off valve is controlled via the communication means.
前記制御部の制御は、前記通信手段を介して得られた情報によって、制御を変更することが可能であることを特徴とする請求項１８記載の冷媒充填装置。 The communication means can communicate via the Internet,
The refrigerant filling device according to claim 18, wherein the control of the control unit can be changed by the information obtained via the communication means.
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| KR1020200014298A KR20210005511A (en) | 2019-07-04 | 2020-02-06 | Refrigerant charge device and Refrigerant system having the same |
| US16/920,264 US11493249B2 (en) | 2019-07-04 | 2020-07-02 | Refrigerant charge device and refrigerant charge system having the same |
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