CN106032955A - A refrigerant recovery unit and an outdoor unit connected with the same - Google Patents

A refrigerant recovery unit and an outdoor unit connected with the same Download PDF

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Publication number
CN106032955A
CN106032955A CN201510102367.9A CN201510102367A CN106032955A CN 106032955 A CN106032955 A CN 106032955A CN 201510102367 A CN201510102367 A CN 201510102367A CN 106032955 A CN106032955 A CN 106032955A
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China
Prior art keywords
refrigerant
port
cold
producing medium
recovery
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CN201510102367.9A
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Chinese (zh)
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CN106032955B (en
Inventor
冈本敦
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Daikin Industries Ltd
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Daikin Industries Ltd
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Publication of CN106032955A publication Critical patent/CN106032955A/en
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Publication of CN106032955B publication Critical patent/CN106032955B/en
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Abstract

The invention provides an additionally arranged refrigerant recovery unit used only for recovering a refrigerant in an indoor unit and communicating matching pipes during movement and addition of the indoor unit. In the refrigerant recovery unit (50), after a general port (371) of a liquid side stop valve (37) is closed and a refrigerant inflow port (51) is connected with a maintenance port (372) of the liquid side stop valve (37) via a pipe (511), under the condition that a refrigerant is made to circulate through heating operation circulation, a gas refrigerant is pressed in from a gas side stop valve (38), so that a liquid refrigerant in an indoor heat exchanger (21), a liquid side communicating matching pipe (14) and a gas side communicating matching pipe (16) is pressed out from the maintenance port (372) of the liquid side stop valve (37); the liquid refrigerant is stored in a refrigerant storage container (55).

Description

Refrigerant-recovery unit and the outdoor unit being connected with this refrigerant-recovery unit
Technical field
The present invention relates to refrigerant-recovery unit, particularly add the cold-producing medium being arranged at outdoor unit etc. Recovery unit.
Background technology
In the case of the indoor unit set of air-conditioning device is moved, sets up or changed, need to take out Go out cold-producing medium.At present, record at such as patent documentation 1 (Japanese Patent Laid-Open 2000-249385 publication) Refrigerating plant in, have employed refrigerant storage by refrigerant-recovery in the outdoor heat exchange of outdoor unit The method of device, reservoir etc..
Prior art literature
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 2000-249385 publication
But, said method is difficult to full dose in the machine that refrigerant amount is more and reclaims.It addition, also can Reclaim cold-producing medium with refrigerant recovering apparatus, but be difficult to the cold-producing medium only reclaiming in indoor unit, as a result of which it is, Needing to carry out full dose recovery, recovery time is longer.It addition, the cold-producing medium reclaimed by refrigerant recovering apparatus must Regeneration Treatment must be carried out, it is difficult to use.
Summary of the invention
The technical problem of the present invention be to provide a kind of can be when the shifting of indoor unit sets etc. only to indoor unit And the cold-producing medium in connection pipe arrangement carries out the refrigerant-recovery unit of the additional setting reclaimed.
The refrigerant-recovery unit of the present invention the first technical scheme is temporarily mounted to refrigerating plant and freezes Agent recovery and cold-producing medium return, and wherein, above-mentioned refrigerating plant utilizes indoor unit, outdoor unit and by indoor What unit connected with outdoor unit connects pipe arrangement composition refrigerant loop, and it includes that cold-producing medium flows into port, system Cryogen flows out port, refrigerant storage container and the mechanism of decompressor.Cold-producing medium flows into port when refrigerant-recovery It is connected with the pressure duct of refrigerant loop.Refrigerant outflow port is when cold-producing medium returns and refrigerant loop Low pressure line connect.The cold-producing medium flowing into cold-producing medium inflow port is stored by refrigerant storage container. The mechanism of decompressor is connected between refrigerant storage container and refrigerant outflow port.
Typically in the outdoor unit of air-conditioning device, it is provided with two stop valves, in the respective connection of these stop valves Connect on port and have the connection pipe arrangement being connected with indoor unit.In addition to connectivity port, each stop valve also has There is the maintenance port connected with this connectivity port.
Therefore, in this refrigerant-recovery unit, such as, make refrigerant cycle heating the circulation of operating In the case of, close the stop valve (hydraulic fluid side stop valve) that connects with the refrigerant outlet side of indoor unit and Cold-producing medium is flowed into after port is connected with the maintenance port of this stop valve, by from the refrigeration with indoor unit Stop valve (gas side stop valve) the press-in gas refrigerant of agent inlet side communication, can be by indoor unit and connection Liquid refrigerant in pipe arrangement extrudes from maintenance port, makes this liquid refrigerant be stored in refrigerant storage and holds Device.
The refrigerant-recovery unit of the present invention the second technical scheme is the refrigerant-recovery in the first technical scheme On the basis of unit, refrigerant-recovery unit also includes temperature sensor, and this temperature sensor is direct or indirect The temperature flowing into the cold-producing medium that port flows to refrigerant storage container from cold-producing medium is detected by ground.
In this refrigerant-recovery unit, reclaim cold-producing medium, when in pipe arrangement from indoor unit and connection pipe arrangement When refrigerant amount reduces, cold-producing medium evaporates and becomes gas refrigerant, therefore, flows into cold-producing medium and flows into port The temperature of cold-producing medium can reduce.By detect this temperature and judge detected value whether below setting, energy End to refrigerant-recovery judges.
The refrigerant-recovery unit of the present invention the 3rd technical scheme is the refrigerant-recovery in the first technical scheme On the basis of unit, refrigerant-recovery unit also includes electromagnetic valve, and this electromagnetic valve is connected to the mechanism of decompressor and system Cryogen flows out between port.
In this refrigerant-recovery unit, the when of can preventing cold-producing medium in addition to when cold-producing medium returns from Refrigerant storage container flows out via the mechanism of decompressor.
The refrigerant-recovery unit of the present invention the 4th technical scheme is the refrigerant-recovery in the first technical scheme On the basis of unit, refrigerant-recovery unit also includes relief valve, and this relief valve is in refrigerant storage container Pressure carry out opening action when being in more than authorized pressure.
In this refrigerant-recovery unit, the exception pressure in refrigerant storage container when can prevent refrigerant-recovery Power rises.
The refrigerant-recovery unit of the present invention the 5th technical scheme is to the 4th technical side in the first technical scheme In case on the basis of the refrigerant-recovery unit of arbitrary technical scheme, outdoor unit have compressor, first section Only valve, the second stop valve and switching valve.First stop valve has the first port being connected with the first connection pipe arrangement And the first maintenance port that pipe arrangement connects, the most above-mentioned first connection pipe arrangement and indoor unit phase is connected with first Connect and cold-producing medium flows through for liquid.Second stop valve has the second port being connected with the second connection pipe arrangement, its In above-mentioned second connection pipe arrangement be connected with indoor unit and supplied gas cold-producing medium flows through.Switching valve makes from compression The high-pressure refrigerant of machine flows to the first port of the first stop valve or the second port of the second stop valve.Additionally, Cold-producing medium flows into port and the first maintenance port connects, in the state that the first port shutdown, the second port are opened Under, carry out the operating making high-pressure refrigerant flow to the second port.
In this refrigerant-recovery unit, high-pressure refrigerant flows to the second port, therefore, indoor unit and Cold-producing medium in each connection pipe arrangement can be pushed by high-pressure refrigerant and extrude from the first maintenance port, and via system Cryogen flows into port and is stored in refrigerant storage container.As a result of which it is, in indoor unit and respectively connection pipe arrangement Cold-producing medium be recovered to refrigerant storage container.
The refrigerant-recovery unit of the present invention the 6th technical scheme is to the 4th technical side in the first technical scheme In case on the basis of the refrigerant-recovery unit of arbitrary technical scheme, outdoor unit have compressor, first section Only valve, the second stop valve, the 3rd stop valve and switching valve.First stop valve has and connects pipe arrangement with first even The first port connect, the most above-mentioned first connection pipe arrangement is connected with indoor unit and cold-producing medium flows through for liquid. Second stop valve has the second port being connected with the second connection pipe arrangement, the most above-mentioned second connection pipe arrangement and room Interior unit is connected and supplied gas cold-producing medium flows through.3rd stop valve has the 3rd port, and the 3rd port makes stream Refrigerant branch to the first port of the first stop valve.Switching valve makes the high-pressure refrigerant stream from compressor To the first port or second port of the second stop valve of the first stop valve.Additionally, cold-producing medium flow into port with 3rd port connects, and when the first port shutdown, the second port and the 3rd port are opened, makes High-pressure refrigerant flows to the operating of the first port.
In this refrigerant-recovery unit, high-pressure refrigerant divides towards the 3rd port by flowing to the first port Zhi Liudong, the part of refrigerant in outdoor unit is stored in refrigerant storage container, indoor unit and respectively connecting Cold-producing medium in wildcard pipe is recovered to outdoor unit, therefore, substantially with indoor unit and respectively connect pipe arrangement Interior refrigerant storage is identical in refrigerant storage container.
The refrigerant-recovery unit of the present invention the 7th technical scheme is to the 4th technical side in the first technical scheme In case on the basis of the refrigerant-recovery unit of arbitrary technical scheme, refrigerant-recovery unit also includes cold-producing medium Recovery compressor, the suction side of this refrigerant-recovery compressor connects with the end face of refrigerant storage container Connecing, discharge side is connected with refrigerant outflow port side.Outdoor unit has the first stop valve and the second cut-off Valve.First stop valve has the first port being connected with the first connection pipe arrangement and connects pipe arrangement connection with first First maintenance port, the most above-mentioned first connection pipe arrangement is connected with indoor unit and cold-producing medium flows through for liquid. Second stop valve have with second connection the second port of being connected of pipe arrangement and connect with second that pipe arrangement connects the Two maintenance ports, the most above-mentioned second connection pipe arrangement is connected with indoor unit and supplied gas cold-producing medium flows through.This Outward, cold-producing medium flows into port and the first maintenance port connects, and refrigerant outflow port and the second maintenance port are even Connect, when the first port and the second port shutdown, make refrigerant-recovery compressor operation.
In this refrigerant-recovery unit, by the operating of refrigerant-recovery compressor, by high pressure gas system Cryogen connects pipe arrangement via the second maintenance port press-in of the second stop valve to second from refrigerant outflow port, Therefore, the liquid refrigerant in the second connection pipe arrangement, indoor unit and the first connection pipe arrangement can be via first section Only the first of valve is keeped in repair port and is pressed out to cold-producing medium and flows into port.As a result of which it is, indoor unit and respectively connecting Cold-producing medium in wildcard pipe is recovered to refrigerant storage container.
The refrigerant-recovery unit of the present invention the 8th technical scheme is to the 4th technical side in the first technical scheme In case on the basis of the refrigerant-recovery unit of arbitrary technical scheme, also include: heat exchanger, this heat exchange The outlet pipe arrangement of device is connected with the end face of refrigerant storage container；Pressure fan, this pressure fan is sent towards heat exchanger Wind；And refrigerant-recovery compressor, the suction side of this refrigerant-recovery compressor is flowed out with cold-producing medium Port side connects, and discharge side is connected with the entrance pipe arrangement of heat exchanger.Outdoor unit has the first stop valve With the second stop valve.First stop valve has the first port being connected with the first connection pipe arrangement and connects with first First maintenance port of pipe arrangement connection, the most above-mentioned first connection pipe arrangement is connected with indoor unit and feed flow system Cryogen flows through.Second stop valve has the second port being connected with the second connection pipe arrangement and connects pipe arrangement with second Second maintenance port of connection, the most above-mentioned second connection pipe arrangement is connected with indoor unit and supplied gas cold-producing medium Flow through.Additionally, cold-producing medium flows into port and the first maintenance port connects, refrigerant outflow port and the second dimension Repair port to connect, when the first port and the second port shutdown, make refrigerant-recovery compressor transport Turn.
In this refrigerant-recovery unit, by the operating of refrigerant-recovery compressor, the second connection pipe arrangement, Cold-producing medium in indoor unit and the first connection pipe arrangement keeps in repair port via refrigeration from the second of the second stop valve Agent is flowed out port and is sucked into compressor.Cold-producing medium after compression is carried towards heat exchanger, condenses and store It is stored in refrigerant storage container.Cold-producing medium flows into port and the first maintenance port connects, and this cold-producing medium flows into end Mouth is connected with refrigerant storage container, and therefore, the first maintenance port becomes high pressure.Therefore, the first connection is joined Residual refrigerant in pipe, indoor unit and the second connection pipe arrangement is in the way of flowing to the second maintenance port side It is forced out.As a result of which it is, indoor unit and each cold-producing medium connected in pipe arrangement are recovered to refrigerant storage and hold Device.
The outdoor unit of the present invention the 9th technical scheme is that the refrigerant-recovery unit with the second technical scheme connects The outdoor unit connect, it includes control portion, and this control portion performs refrigerant-recovery to refrigerant storage container Refrigerant-recovery operation mode.Control portion has the connecting portion being connected with temperature sensor, and to be judged to Temperature sensor and connecting portion are connected as condition, perform refrigerant-recovery operation mode.
In this outdoor unit, even if in the case of refrigerant-recovery unit is not provided with control portion, also can enter Row refrigerant-recovery operates.
The outdoor unit of the present invention the tenth technical scheme is that the refrigerant-recovery unit with the 3rd technical scheme connects The outdoor unit connect, it includes control portion, and this control portion performs to make cold-producing medium return from refrigerant storage container Cold-producing medium to refrigerant loop returns operation mode.Control portion has the connecting portion being connected with electromagnetic valve, and To be judged to that electromagnetic valve and connecting portion are connected as condition, perform cold-producing medium and return operation mode.
In this outdoor unit, it not be used in refrigerant-recovery unit the control portion that arranges, just can carry out cold-producing medium Return operating.
The outdoor unit of the present invention the 11st technical scheme is to appoint in the first technical scheme to the tenth technical scheme The outdoor unit of one technical scheme, the object as refrigerant-recovery and cold-producing medium return of refrigerant loop Cold-producing medium is R32.In this outdoor unit, by using unitary system cryogen, can easily cold-producing medium be entered Row recycling.
In the refrigerant-recovery unit of the present invention the first technical scheme, such as, make heating the circulation of operating In the case of refrigerant cycle, at the stop valve (liquid that closedown connects with the refrigerant outlet side of indoor unit Side stop valve) and cold-producing medium is flowed into after port is connected with the maintenance port of this stop valve, by from Stop valve (gas side stop valve) the press-in gas refrigerant of the refrigerant inlet side connection of indoor unit, can be by Liquid refrigerant in indoor unit and connection pipe arrangement extrudes from maintenance port, makes this liquid refrigerant be stored in Refrigerant storage container.
In the refrigerant-recovery unit of the present invention the second technical scheme, reclaim from indoor unit and connection pipe arrangement Cold-producing medium, when the refrigerant amount in pipe arrangement reduces, cold-producing medium evaporates and becomes gas refrigerant, therefore, The temperature flowing into the cold-producing medium that cold-producing medium flows into port can reduce.By detecting this temperature and judging that detected value is No below setting, the end of refrigerant-recovery can be judged.
In the refrigerant-recovery unit of the present invention the 3rd technical scheme, cold-producing medium can be prevented except cold-producing medium Flow out via the mechanism of decompressor from refrigerant storage container when of outside during return.
In the refrigerant-recovery unit of the present invention the 4th technical scheme, cold-producing medium when can prevent refrigerant-recovery Abnormal pressure in hold-up vessel rises.
In the refrigerant-recovery unit of the present invention the 5th technical scheme, high-pressure refrigerant flows to the second end Mouthful, therefore, the cold-producing medium in indoor unit and each connection pipe arrangement can be pushed by high-pressure refrigerant and tie up from first Repair port to extrude, and flow into port via cold-producing medium and be stored in refrigerant storage container.As a result of which it is, room Cold-producing medium in interior unit and each connection pipe arrangement is recovered to refrigerant storage container.
In the refrigerant-recovery unit of the present invention the 6th technical scheme, high-pressure refrigerant is by flowing to first Port and towards the 3rd port diverted flow, the part of refrigerant in outdoor unit be stored in refrigerant storage hold Cold-producing medium in device, indoor unit and each connection pipe arrangement is recovered to outdoor unit, therefore, substantially with room Refrigerant storage in interior unit and each connection pipe arrangement is identical in refrigerant storage container.
In the refrigerant-recovery unit of the present invention the 7th technical scheme, by refrigerant-recovery compressor Operating, keeps in repair port pressure from refrigerant outflow port via the second of the second stop valve by high-pressure gas refrigerant Enter to the second connection pipe arrangement, therefore, the liquid in the second connection pipe arrangement, indoor unit and the first connection pipe arrangement Cold-producing medium can be pressed out to cold-producing medium flow into port via the first maintenance port of the first stop valve.Its result It is that the cold-producing medium in indoor unit and each connection pipe arrangement is recovered to refrigerant storage container.
In the refrigerant-recovery unit of the present invention the 8th technical scheme, by refrigerant-recovery compressor Operating, the cold-producing medium in the second connection pipe arrangement, indoor unit and the first connection pipe arrangement is from the of the second stop valve Two maintenance ports are sucked into refrigerant-recovery compressor via refrigerant outflow port.System after compression Cryogen is carried towards heat exchanger, condenses and be stored in refrigerant storage container.Cold-producing medium flows into port and the One maintenance port connects, and this cold-producing medium flows into port and is connected with refrigerant storage container, therefore, and the first maintenance Port becomes high pressure.Therefore, the residual refrigeration in the first connection pipe arrangement, indoor unit and the second connection pipe arrangement Agent is forced out in the way of flowing to the second maintenance port side.As a result of which it is, indoor unit and respectively connect pipe arrangement Interior cold-producing medium is recovered to refrigerant storage container.
In the outdoor unit of the present invention the 9th technical scheme, even if being not provided with controlling at refrigerant-recovery unit In the case of portion, also can carry out refrigerant-recovery operating.
In the outdoor unit of the present invention the tenth technical scheme, it not be used in refrigerant-recovery unit and control is set Portion, just can carry out refrigerant-recovery operating.
In the outdoor unit of the present invention the 11st technical scheme, by using unitary system cryogen, just can be easily Cold-producing medium is recycled by ground.
Accompanying drawing explanation
Fig. 1 is the refrigeration of the refrigerating plant that the refrigerant-recovery unit with first embodiment of the invention is connected Agent loop diagram.
Fig. 2 is the block diagram in control portion.
Fig. 3 is the control flow chart of the refrigerant-recovery operating of the first embodiment.
Fig. 4 is that the cold-producing medium of the first embodiment returns the control flow chart operated.
Fig. 5 is the refrigeration of the refrigerating plant that the refrigerant-recovery unit with second embodiment of the invention is connected Agent loop diagram.
Fig. 6 is the control flow chart of the refrigerant-recovery operating of the second embodiment.
Fig. 7 is the loop diagram of the refrigerating plant that the refrigerant-recovery unit with the 3rd embodiment is connected.
Fig. 8 is the control block diagram of the 3rd embodiment.
Fig. 9 is the control flow chart of the refrigerant-recovery operating of the 3rd embodiment.
Figure 10 is the loop diagram of the refrigerating plant that the refrigerant-recovery unit with the 4th embodiment is connected.
Figure 11 is the control block diagram of the 4th embodiment.
Figure 12 is the control flow chart of the refrigerant-recovery operating of the 4th embodiment.
Symbol description
14 hydraulic fluid side connection pipe arrangements (the first connection pipe arrangement)
16 gas side connection pipe arrangements (the second connection pipe arrangement)
20 indoor units
30 outdoor units
31 compressors
32 four-way switching valves (switching valve)
37 hydraulic fluid side stop valves (the first stop valve)
371 usual ports (the first port)
372 maintenance ports (the first maintenance port)
38 gas side stop valves (the second stop valve)
381 usual ports (the second port)
382 maintenance ports (the second maintenance port)
40 the 3rd stop valves
401 usual ports (the 3rd port)
50 refrigerant-recovery unit
51 cold-producing mediums flow into port
52 refrigerant outflow port
55 refrigerant storage container
56 mechanisms of decompressor
59 electromagnetic valves
61 refrigerant-recovery compressors
63 heat exchangers
65 fans (pressure fan)
80 control portions
81 temperature sensors
83 relief valve
Detailed description of the invention
Referring to the drawings embodiments of the present invention are illustrated.Implementation below is the tool of the present invention Style, does not limit the technical scope of the present invention.
＜ the first embodiment ＞
(1) structure of refrigerating plant 1
Fig. 1 is the refrigerating plant 1 that the refrigerant-recovery unit 50 with first embodiment of the invention is connected Loop diagram.Refrigerating plant 1 is made up of indoor unit 20 and outdoor unit 30.This refrigerating plant 1 pass through into The kind of refrigeration cycle operating of row steam compression type carries out the cooling and warming in building.
In refrigerating plant 1, by utilizing hydraulic fluid side connection pipe arrangement 14 and gas side connection pipe arrangement 16 to press Contracting machine 31, four-way switching valve 32, outdoor heat converter 33, outdoor expansion valve 34, indoor heat converter 21 And storage tank 36 etc. links together, thus constitute refrigerant loop 10.
When cooling operation, four-way switching valve 32 becomes the state shown in solid of Fig. 1, i.e. become pressure The discharge side of contracting machine 31 be connected with the gas side of outdoor heat converter 33 and compressor 31 suction side via Storage tank 36 and the state that is connected with the gas side of indoor heat converter 21.In cooling operation, refrigerating plant 1 makes outdoor heat converter 33 work as radiator, and makes indoor heat converter 21 rise as vaporizer Effect.
When heating operating, four-way switching valve 32 becomes the state shown in solid of Fig. 1, i.e. become pressure The discharge side of contracting machine 31 be connected with the gas side of indoor heat converter 21 and compressor 31 suction side via Storage tank 36 and the state that is connected with the gas side of outdoor heat converter 33.In heating operating, refrigerating plant 1 makes indoor heat converter 21 work as radiator, and makes outdoor heat converter 33 rise as vaporizer Effect.
(1-1) indoor unit 20
Indoor unit 20 by hang over wall first-class and be arranged at indoor wall or by imbed or suspension etc. and It is arranged at the indoor ceiling of high building etc..Indoor unit 20 has indoor heat converter 21, indoor expansion Valve 22 and indoor fan 71.
(1-1-1) indoor heat converter 21
Indoor heat converter 21 is that the fin tube heat of the cross-fin formula being made up of heat pipe and many fins is handed over Parallel operation.In the appropriate position of indoor heat converter 21, heat-exchanger temperature sensor 211 is installed.
In the present embodiment, indoor heat converter 21 is the fin-tube heat exchanger of cross-fin formula, but It is not limited to this, it is possible to the heat exchanger taken other form.
(1-1-2) indoor expansion valve 22
Indoor expansion valve 22 is electrodynamic type expansion valve.Indoor expansion valve 22 is in order to at refrigerant loop 10 The flow of cold-producing medium of indoor flowing be adjusted etc. and be connected with the hydraulic fluid side of indoor heat converter 21. It addition, indoor expansion valve 22 also can cut off the circulation of cold-producing medium.
(1-1-3) indoor fan 71
Indoor unit 20 has indoor fan 71.Room air is being sucked into indoor list by indoor fan 71 In unit 20 and after making this room air carry out heat exchange with cold-producing medium in indoor heat converter 21, by it It is supplied to indoor as supply air.It addition, indoor fan 71 can change supply in regulation air quantity scope Air quantity to the air of indoor heat converter 21.
(1-2) outdoor unit 30
Outdoor unit 30 be accommodated with in inside compressor 31, four-way switching valve 32, outdoor heat converter 33, Outdoor expansion valve 34, storage tank 36, supercooling heat exchanger 45 and outdoor fan 73 etc..It addition, it is outdoor Unit 30 is also accommodated with the duplexure 19 through supercooling heat exchanger 45.
(1-2-1) compressor 31
Compressor 31 is volume-variable formula compressor, and the driving of its motor is by inverter control rotating speed.? In present embodiment, compressor 31 only has one, but is not limited to this, it is possible to according to indoor apparatus of air conditioner Connection number of units etc. the compressor parallel of more than two is connected.
(1-2-2) four-way switching valve 32
Four-way switching valve 32 is the valve that the flow direction to cold-producing medium switches over.When cooling operation, four The discharge side of compressor 31 is connected by direction changeover valve 32 with the gas side of outdoor heat converter 33, and will pressure The suction side (specifically storage tank 36) of contracting machine 31 is connected (cooling operation shape with gas side connection pipe arrangement 16 State: the solid line of the four-way switching valve 32 of reference Fig. 1).
As a result of which it is, outdoor heat converter 33 works as the condenser of cold-producing medium, indoor heat converter 21 work as the vaporizer of cold-producing medium.
When heating operating, the discharge side of compressor 31 is connected pipe arrangement with gas side by four-way switching valve 32 16 connect, and are connected with the gas side of outdoor heat converter 33 suction side of compressor 31 and (heat operating State: the dotted line of the four-way switching valve 32 of reference Fig. 1).
As a result of which it is, indoor heat converter 21 works as the condenser of cold-producing medium, outdoor heat converter 33 work as the vaporizer of cold-producing medium.
(1-2-3) outdoor heat converter 33
Outdoor heat converter 33 is the fin-tube heat exchanger of cross-fin formula.But, it is not limited to this, It can also be the heat exchanger of other form.The gas side of outdoor heat converter 33 is with four-way switching valve 32 even Connecing, the hydraulic fluid side of outdoor heat converter 33 is connected with outdoor expansion valve 34.
(1-2-4) outdoor expansion valve 34
Outdoor expansion valve 34 is electric expansion valve, its refrigeration to the outdoor side at refrigerant loop 10 The pressure of agent, flow etc. are adjusted.In the outdoor expansion valve 34 refrigerant loop 10 when cooling operation Cold-producing medium flow direction on be configured at the downstream of outdoor heat converter 33.
When cooling operation, the aperture of outdoor expansion valve 34 is full-gear.On the other hand, fortune is being heated When turning, the aperture of outdoor expansion valve 34 is adjusted, with the cold-producing medium by inflow outdoor heat exchanger 33 It is depressurized to the pressure (i.e. evaporating pressure) that it can be made to evaporate in outdoor heat converter 33.
(1-2-5) storage tank 36
Liquid refrigerant is separated by storage tank 36 with gas refrigerant.Storage tank 36 is connected with sucking recurrent canal 361, This suction recurrent canal 361 can extract cold-producing medium in storage tank 36 out, and makes this cold-producing medium be back to compressor 31 Suction side.This suction recurrent canal 361 is provided with suction and returns open and close valve 362.Absorption returns open and close valve 362 is electromagnetic valve.
(1-2-6) supercooling heat exchanger 45
After supercooling heat exchanger 45 cools down in outdoor heat converter 33 or indoor heat converter 21 Carrying out the heat exchanger of heat exchange between cold-producing medium and the cold-producing medium flowed in duplexure 19, it has The stream flowed in an opposing fashion for two-way cold-producing medium.At duplexure 19 as supercooling heat exchange The position of the upstream side of device 45 is provided with branch's side expansion valve 47.
(1-2-7) outdoor fan 73
The outdoor air of suction is delivered to outdoor heat converter 33 and makes it enter with cold-producing medium by outdoor fan 73 Row heat exchange.Outdoor fan 73 can change air quantity when being delivered to outdoor heat converter 33.Outdoor fan 73 Being propeller etc., it is by the motor-driven constituted with DC fan motor etc..
(1-2-8) hydraulic fluid side stop valve 37
On the flow direction of the cold-producing medium in the hydraulic fluid side stop valve 37 refrigerant loop 10 when cooling operation It is configured at the downstream of outdoor expansion valve 34, and is configured at the upstream side of hydraulic fluid side connection pipe arrangement 14.
Hydraulic fluid side stop valve 37 has: generally port 371；Maintenance port 372；And for either on or off The generally valve 373 of port 371.Hydraulic fluid side connection pipe arrangement 14 and the usual port that cold-producing medium flows through for liquid 371 connect.
When valve 373 cuts out usual port 371, maintenance port 372 also connects with usual port 371, because of This, as a result of which it is, maintenance port 372 connects with hydraulic fluid side in the way of being not only restricted to the either on or off of valve 373 Wildcard pipe 14 connects.
(1-2-9) gas side stop valve 38
Gas side stop valve 38 is connected with four-way switching valve 32.Gas side stop valve 38 has: generally hold Mouth 381；Maintenance port 382；And the valve 383 for the usual port of either on or off 381.Supplied gas is freezed The gas side connection pipe arrangement 16 that agent is flow through is connected with usual port 381.Even if valve 383 cuts out usual port 381, maintenance port 382 also connects with usual port 381, therefore, as a result of which it is, maintenance port 382 In the way of being not only restricted to the either on or off of valve 383, connect pipe arrangement 16 connect with gas side.
(1-2-10) gas side preparation stop valve 39
Gas side preparation stop valve 39 is connected to the low-pressure side pipe arrangement between four-way switching valve 32 and storage tank 36. Gas side preparation stop valve 39 has: generally port 391；And check-valves 393, this check-valves 393 energy Cold-producing medium is made only to circulate towards low-pressure side pipe arrangement from usual port 391.The preparation end of refrigerant-recovery unit 50 Mouth 53 is connected with usual port 391 via pipe 531.
(1-2-11) the 3rd stop valve 40
3rd stop valve 40 has: generally port 401, this usual port 401 with from by outdoor heat exchange Device 33 is connected towards the branched pipe of the branched halfway of the pipe arrangement of the usual port 371 of hydraulic fluid side stop valve 37； And valve 403, this valve 403 is for the usual port of either on or off 401.
(1-2-12) control portion 80
Fig. 2 is the block diagram in control portion 80.In fig. 2, control portion 80 is by control portion, outside 801 and room Control portion 803, inner side is constituted.
Control portion, outside 801 is configured in outdoor unit 30, and the action to each equipment is controlled. It addition, control portion, indoor 803 is configured in indoor unit 20, and indoor expansion valve 22 etc. is controlled System.Control portion, outside 801 and control portion, indoor 803 are respectively provided with microcomputer, memorizer etc., Can mutually be controlled the exchange of signal etc..
It is connected it addition, be provided with in control portion, outside 801 with the wire harness from refrigerant-recovery unit 50 Terminal connection part 801a.
(1-3) refrigerant-recovery unit 50
Indoor unit 20, hydraulic fluid side connection pipe arrangement 14 and gas is reclaimed when shifting at indoor unit 20 sets etc. In the case of cold-producing medium in side connection pipe arrangement 16, or set in the shifting of indoor unit 20 and made refrigeration afterwards In the case of agent is back to refrigerant loop 10, refrigerant-recovery unit 50 is via hydraulic fluid side stop valve 37 And gas side stop valve 38 is connected with outdoor unit 30.
Refrigerant-recovery unit 50 includes that cold-producing medium flows into port 51, refrigerant outflow port 52, cold-producing medium Hold-up vessel 55 and the mechanism of decompressor 56.
(1-3-1) cold-producing medium flows into port 51
Cold-producing medium flows into port 51 and is connected via the inside of connecting pipings 501 with refrigerant storage container 55. It addition, cold-producing medium flows into port 51 dimension via pipe 511 with hydraulic fluid side stop valve 37 when refrigerant-recovery Repair port 372 to connect.It addition, cold-producing medium flows into port 51 self also includes stop valve.
(1-3-2) refrigerant outflow port 52
Refrigerant outflow port 52 is via the container inner bottom part of connecting pipings 502 with refrigerant storage container 55 It is connected.Refrigerant outflow port 52 when cold-producing medium returns via the dimension of pipe 521 with gas side stop valve 38 Repair port 382 to connect.It addition, refrigerant outflow port 52 self also includes stop valve.
(1-3-3) refrigerant storage container 55
The cold-producing medium flowing into cold-producing medium inflow port 51 is stored by refrigerant storage container 55.And refrigeration Agent flows into the connecting pipings 502 that the connected connecting pipings 501 of port 51 is connected with refrigerant outflow port 52 And the connecting pipings 503 being connected with alternate port 53 is connected with refrigerant storage container 55.
(1-3-4) mechanism of decompressor 56
The mechanism of decompressor 56 is the capillary tube that the midway with connecting pipings 502 is connected, and this connecting pipings 502 will Refrigerant storage container 55 and refrigerant outflow port 52 connect.The mechanism of decompressor 56 is when cold-producing medium returns Cold-producing medium in refrigerant storage container 55 is reduced pressure.
(1-3-5) check-valves 58
Check-valves 58 is connected to the midway of connecting pipings 502 and is connected to the mechanism of decompressor 56 and electromagnetic valve 59 Between, and allow cold-producing medium from refrigerant storage container 55 towards the circulation of refrigerant outflow port 52.That is, Prevent cold-producing medium from refrigerant outflow port 52 adverse current.
(1-3-6) electromagnetic valve 59
Electromagnetic valve 59 is connected to the midway of connecting pipings 502 and is connected to the mechanism of decompressor 56 and cold-producing medium outflow Between port 52.From refrigeration when that electromagnetic valve 59 can preventing cold-producing medium in addition to when cold-producing medium returns Developing agent storage container 55 flows out via the mechanism of decompressor 56.
(1-3-7) temperature sensor 81
Temperature sensor 81 flows to refrigerant storage container to from cold-producing medium inflow port 51 directly or indirectly The temperature of the cold-producing medium of 55 detects.In the present embodiment, temperature sensor 81 is configured at connection and joins On pipe 501.
(1-3-8) relief valve 83
The relief valve 83 pressure in refrigerant storage container 55 carries out opening dynamic when being in more than authorized pressure Make, to prevent the abnormal pressure in refrigerant storage container 55 from rising.
(1-3-9) alternate port 53
Alternate port 53 is connected with the container internal upper part of refrigerant storage container 55 via pipe arrangement.Alternate port 53 connect via the usual port 391 of pipe 531 with gas side preparation stop valve 39 when refrigerant-recovery operates Connect.It addition, alternate port 53 self also includes stop valve.
(2) action of refrigerating plant 1
(2-1) cooling operation
When cooling operation, four-way switching valve 32 is in the state shown in solid of Fig. 1.At this cold-producing medium In loop, when compressor 31, outdoor fan 73 and indoor fan 71 operate, the gas refrigerant of low pressure Compressor 31 is compressed and is become the gas refrigerant of high pressure.
The gas refrigerant of this high pressure is via oil eliminator 311, check-valves 313 and four-way switching valve 32 It is delivered to outdoor heat converter 33.Then, the gas refrigerant of high pressure in outdoor heat converter 33 with by The outdoor air that outdoor fan 73 supply comes carries out heat exchange and dispels the heat.
Additionally, cooling condensed high-pressure refrigerant are via the room of full-gear in outdoor heat converter 33 Outer expansion valve 34 and flow to supercooling heat exchanger 45.Flow to the part refrigeration of supercooling heat exchanger 45 Agent flows to duplexure 19, and after being reduced pressure by branch's side expansion valve 47, enters supercooling heat exchange Device 45.Therefore, in outdoor heat converter 33 cooling after cold-producing medium in supercooling heat exchanger 45 with In duplexure 19, the cold-producing medium of flowing carries out heat exchange, thus is further cooled by.
The cold-producing medium flowed out from supercooling heat exchanger 45 is joined via hydraulic fluid side stop valve 37, hydraulic fluid side connection Pipe 14 and be transported to indoor expansion valve 22, and reduced pressure by indoor expansion valve 22 and become the gas-liquid two of low pressure The cold-producing medium of phase state.The cold-producing medium of the gas-liquid two-phase state becoming low pressure is transported to indoor heat converter 21, and in indoor heat converter 21, carry out heat exchange with the room air supplied by indoor fan 71 and Evaporation, thus become the gas refrigerant of low pressure.
The gas refrigerant of this low pressure is cut via gas side connection pipe arrangement 16, gas side stop valve 38 and four-way Change valve 32 and enter storage tank 36.It addition, from the cold-producing medium of duplexure 19 also into storage tank 36.
From storage tank 36 flow out low pressure refrigerant and isolate oil eliminator 311 and at capillary tube 312 In post-decompression oil at the interflow, midway of the suction side flowing to compressor 31, and be sucked into compressor 31. So, cooling operation is carried out.
(2-2) operating is heated
When heating operating, four-way switching valve 32 is in the state shown in the dotted line of Fig. 1.At this cold-producing medium In loop, when compressor 31, outdoor fan 73 and indoor fan 71 operate, the gas refrigerant of low pressure Compressor 31 is compressed and is become the gas refrigerant of high pressure.
The gas refrigerant of this high pressure is via oil eliminator 311, check-valves 313 and four-way switching valve 32 It is delivered to indoor heat converter 21.Then, the gas refrigerant of high pressure in indoor heat converter 21 with by The room air that indoor fan 71 supply comes carries out heat exchange and dispels the heat.
Additionally, cooling condensed high-pressure refrigerant are from indoor heat converter in indoor heat converter 21 21 via full-gear indoor expansion valve 22, hydraulic fluid side connection pipe arrangement 14 and hydraulic fluid side stop valve 37 and Flow to supercooling heat exchanger 45.
Enter the part firstly flowing through supercooling heat exchanger 45 in the cold-producing medium of supercooling heat exchanger 45 Cold-producing medium flows to duplexure 19, and is again introduced into supercooling after decompression in branch's side expansion valve 47 Heat exchanger 45, therefore, in indoor heat converter 21, the cold-producing medium after cooling is at supercooling heat exchanger Carry out heat exchange with the cold-producing medium of flowing in duplexure 19 in 45, thus be further cooled by.
The cold-producing medium flowed out from supercooling heat exchanger 45 is transported to outdoor expansion valve 34, and swollen by outdoor Swollen valve 34 reduces pressure and becomes the cold-producing medium of the gas-liquid two-phase state of low pressure.Become the gas-liquid two-phase state of low pressure Cold-producing medium be transported to outdoor heat converter 33, and in outdoor heat converter 33 with by outdoor fan 73 The outdoor air that supply comes carries out heat exchange and evaporates, thus becomes the gas refrigerant of low pressure.
The gas refrigerant of this low pressure enters storage tank 36 via four-way switching valve 32.It addition, from branch The cold-producing medium in loop 19 is also into storage tank 36.
From storage tank 36 flow out low pressure refrigerant and isolate oil eliminator 311 and at capillary tube 312 In post-decompression oil at the interflow, midway of the suction side flowing to compressor 31, and be sucked into compressor 31. So, carry out heating operating.
(2-3) refrigerant-recovery operating
At cooling operation and when heating operating, refrigerant-recovery unit 50 not with the refrigerant loop 10 of Fig. 1 Connect.But, when refrigerant-recovery operates, cold-producing medium flows into port 51 and hydraulic fluid side stop valve 37 Maintenance port 372 connects, and usual port 371 is closed by valve 373.Additionally, at gas side stop valve 38 The state that is opened of usual port 381 under, utilize and heat circulation and carry out making high-pressure refrigerant cut towards gas side The only operating of usual port 381 flowing of valve 38.Hereinafter, with reference to control flow, while to refrigeration Action when operating is reclaimed in agent illustrates.
Fig. 3 is the control flow chart of refrigerant-recovery operating.In figure 3, in step sl, control portion Whether 80 pairs have temperature sensor connection signal to judge.When refrigerant-recovery unit 50 and outdoor unit 30 connect, from wire harness and the terminal connection part 801a in control portion, outside 801 of refrigerant-recovery unit 50 During connection, between the terminal of its internal terminal being connected with temperature sensor 81, resistance changes, therefore, This change becomes the signal of the connection representing temperature sensor 81, and control portion 80 is by control portion, outside 801 Judge to be connected to refrigerant-recovery unit 50.
Then, whether control portion 80 is in step s 2 to having refrigerant-recovery operating to determine that signal judges. Even if refrigerant-recovery unit 50 is connected with outdoor unit 30 and has inputted temperature sensor and connected signal, real Whether border carries out refrigerant-recovery operating remains a need for the judgement of maintainer, therefore, is finally led to by maintainer The regulation input unit input in the control portion, outside 801 crossing remote controller or outdoor unit 30 determines signal.
Then, control portion 80 starts refrigerant-recovery operating in step s3.Refrigerant-recovery operating be by Indoor expansion valve 22 is set to full-gear to heat what operation cycle was carried out.Now, cold-producing medium flows into port 51 are connected with the maintenance port 372 of hydraulic fluid side stop valve 37, and are in the valve 373 of hydraulic fluid side stop valve 37 The state that closedown, the usual port 381 of gas side stop valve 38 are opened.
In this condition, high-pressure refrigerant flows to usual port 381, therefore, hydraulic fluid side connection pipe arrangement 14, Cold-producing medium in indoor heat converter 21 and gas side connection pipe arrangement 16 is pushed by high-pressure refrigerant, and from dimension Repair port 372 to extrude.
The cold-producing medium extruded from maintenance port 372 is stored in cold-producing medium storage via cold-producing medium inflow port 51 Deposit container 55.As a result of which it is, hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas side connection are joined Cold-producing medium in pipe 16 is recovered to refrigerant storage container 55.
It addition, in refrigerant storage container 55 gas componant in cold-producing medium after gas-liquid separation via Alternate port 53, the usual port 391 of gas side preparation stop valve 39 and storage tank 36 and be sucked into compression Machine 31.
Even if rising just in case the intrinsic pressure generation of refrigerant storage container 55 is abnormal, relief valve 83 is store at cold-producing medium Depositing and also can carry out opening action when the pressure in container 55 is in more than authorized pressure, therefore, cold-producing medium is store Safe pressure can be maintained in depositing container 55.
Then, whether control portion 80 is in regulation to the detected value T of temperature sensor 81 in step s 4 Judge below value Tp, as T≤Tp, advance to step S5, when not being T≤Tp, continue into Row judges.
When carrying out refrigerant-recovery and cause the refrigerant amount in pipe arrangement to reduce, cold-producing medium evaporation and become gas Cryogen, therefore, the temperature flowing into the cold-producing medium that cold-producing medium flows into port 51 reduces.Temperature sensor 81 pairs of temperature flowing into the cold-producing medium that port 51 flows to refrigerant storage container 55 from cold-producing medium detect, Therefore, by whether this detected value is in below setting Tp judge, just can be to refrigerant-recovery Terminate to judge.
Therefore, as T≤Tp, control portion 80 stops compressor in step s 5, and terminates cold-producing medium and return Receive operating.
(2-4) cold-producing medium returns operating
At the end of refrigerant-recovery operates, the cold-producing medium of refrigerant-recovery unit 50 flows into port 51 self Stop valve and the stop valve of alternate port 53 self be all closed, the hydraulic fluid side stop valve of outdoor unit 30 37 and gas side stop valve 38 be the most all closed.
Additionally, when the shifting of indoor unit 20 has set, carry out indoor unit 20, hydraulic fluid side connection pipe arrangement 14 and gas side connection the vacuum drying of pipe arrangement 16, evacuation.Additionally, after evacuation completes, this The secondary operation just carrying out making the cold-producing medium in refrigerant storage container 55 to be back to refrigerant loop 10.
First, the refrigerant outflow port 52 of refrigerant-recovery unit 50 is via pipe 521 and outdoor unit The maintenance port 382 of the gas side stop valve 38 of 30 connects.Now, refrigerant outflow port 52 self Stop valve is still closed.Hereinafter, with reference to control flow, say while cold-producing medium is returned operating Bright.
Fig. 4 is the control flow chart that cold-producing medium returns operating.In the diagram, in step s 11, control portion Whether 80 pairs have electromagnetic valve connection signal to judge.Wire harness and outside when refrigerant-recovery unit 50 When the terminal connection part 801a in control portion 801 connects, the end of its internal terminal being connected with electromagnetic valve 29 Between son, resistance changes, and therefore, this change becomes the signal of the connection representing electromagnetic valve 59, control portion By control portion, outside 801,80 can judge that being connected to refrigerant-recovery unit 50 (now, passes with temperature Between the terminal of the terminal that sensor 81 connects, resistance also changes, and therefore, this change becomes expression temperature and passes The signal of the connection of sensor 81, control portion 80 can be connected signal by temperature sensor and judge to be connected to system Cryogen recovery unit 50).
Then, whether control portion 80 is in step s 12 to having cold-producing medium return operating to determine that signal is sentenced Fixed.Even if refrigerant-recovery unit 50 is connected with outdoor unit 30 and has inputted electromagnetic valve and connected signal, real Whether border carries out cold-producing medium return operating remains a need for the judgement of maintainer, therefore, is finally led to by maintainer The regulation input unit input cold-producing medium in the control portion, outside 801 crossing remote controller or outdoor unit 30 returns really Determine signal.
Then, control portion 80 starts cold-producing medium return operating in step s 13.Control portion 30 receives system Cryogen returns and determines signal, and makes electromagnetic valve 59 towards opening direction action.Then, maintainer opens system Cryogen flows out the stop valve of port 52 self, makes the cold-producing medium in refrigerant storage container 55 be back to just quilt In hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas side connection pipe arrangement 16 after evacuation.
Then, whether control portion 80 is in regulation to the detected value T of temperature sensor 81 in step S14 Judge below value Ts, as T≤Ts, advance to step S15, when not being T≤Ts, continue into Row judges.
When carrying out cold-producing medium return and make the refrigerant amount in refrigerant storage container 55 reduce, cold-producing medium Evaporate and become gas refrigerant, therefore, be installed on cold-producing medium and flow into port 51 and refrigerant storage container The detected value T of the temperature sensor 81 of the connecting pipings 501 of 55 reduces.By to this detected value T whether Being in below setting Ts to judge, the end that cold-producing medium can return operating judges.
Therefore, as T≤Ts, control portion 80 closes electromagnetic valve 59 in step S15, and terminates refrigeration Agent returns operating.
The feature of (3) first embodiments
(3-1)
In refrigerant-recovery unit 50, at the valve 373 of closing liquid side stop valve 37 and by cold-producing medium After inflow port 51 is connected with the maintenance port 372 of hydraulic fluid side stop valve 37, by heat operating Circulation makes refrigerant cycle be pressed into gas refrigerant from gas side stop valve 38 towards indoor heat converter 21, Liquid refrigerant quilt in indoor heat converter 21, hydraulic fluid side connection pipe arrangement 14 and gas side connection pipe arrangement 16 Extruding from the maintenance port 372 of hydraulic fluid side stop valve 37, this liquid refrigerant is stored in refrigerant storage to be held Device 55.
(3-2)
In refrigerant-recovery unit 50, carry out refrigerant-recovery, when indoor heat converter 21, hydraulic fluid side When refrigerant amount in connection pipe arrangement 14 and gas side connection pipe arrangement 16 reduces, cold-producing medium evaporates and becomes gas Cryogen, therefore, the temperature flowing into the cold-producing medium that cold-producing medium flows into port 51 reduces.Temperature sensor 81 pairs of these temperature detect, and control portion 80 by whether this detected value T is in below setting Tp is entered Row judges, can judge the end of refrigerant-recovery.
(3-3)
Control portion, outside 801 has the terminal connection part 801a being connected with temperature sensor 81, and when sentencing It is set to temperature sensor 81 when being connected with terminal connection part 801a, performs refrigerant-recovery operation mode.Cause This, even if being not provided with control portion, also to carry out refrigerant-recovery operating at refrigerant-recovery unit 50.
(3-4)
When being judged to that electromagnetic valve 59 is connected with terminal connection part 801a, control portion, outside 801 is carried out Cold-producing medium returns operation mode.Therefore, even if being not provided with control portion at refrigerant-recovery unit 50, also can Carry out cold-producing medium and return operating.
＜ the second embodiment ＞
In the above-described first embodiment, make refrigerant cycle to carry out Indoor Thermal friendship by heating operation cycle Refrigerant-recovery in parallel operation 21, hydraulic fluid side connection pipe arrangement 14 and gas side connection pipe arrangement 16, but herein, Refrigerant cycle is made, to carry out indoor heat converter 21, hydraulic fluid side connection pipe arrangement to by cooling operation circulation 14 and gas side connection pipe arrangement 16 in the embodiment of refrigerant-recovery illustrate.
(1) structure of refrigerating plant 101
Fig. 5 is the refrigerating plant 101 that the refrigerant-recovery unit 50 with second embodiment of the invention is connected Loop diagram.In Figure 5, the cold-producing medium of refrigerant-recovery unit 50 flow into port 51 via pipe 511 with The usual port 401 of the 3rd stop valve 40 connects.It addition, the cold-producing medium of refrigerant-recovery unit 50 flows out Port 52 is connected with the maintenance port 382 of gas side stop valve 38 via pipe 521.It addition, cold-producing medium returns The alternate port 53 receiving unit 50 is connected with the maintenance port 372 of hydraulic fluid side stop valve 37 via pipe 531. Additionally, be not connected with any pipe arrangement on the gas side preparation stop valve 39 of outdoor unit 30.Except above-mentioned knot Structure outside structure is identical with the first embodiment.
(2) action of refrigerating plant 101
The cooling operation of refrigerating plant 101, the action heating operating and cold-producing medium return operating and the first enforcement Mode is identical, therefore, illustrates refrigerant-recovery operating herein.
Fig. 6 is the control flow chart of the refrigerant-recovery operating of the second embodiment.In figure 6, in step In S21, whether control portion 80 is to having temperature sensor connection signal to judge.When refrigerant-recovery unit 50 are connected with outdoor unit 30, from wire harness and the control portion, outside 801 of refrigerant-recovery unit 50 Terminal connection part 801a when connecting, electric between the terminal of its internal terminal being connected with temperature sensor 81 Resistance changes, and therefore, this change becomes the signal of the connection representing temperature sensor 81, control portion 80 Judge to be connected to refrigerant-recovery unit 50 by control portion, outside 801.
Then, control portion 80 in step S22 to whether there being refrigerant-recovery operating to determine that signal is sentenced Fixed.Even if refrigerant-recovery unit 50 is connected with outdoor unit 30 and has inputted temperature sensor and connected signal, Whether reality carries out refrigerant-recovery operating remains a need for the judgement of maintainer, therefore, finally by maintainer Inputted by the regulation input unit in the control portion, outside 801 of remote controller or outdoor unit 30 and determine signal.
Then, control portion 80 starts refrigerant-recovery operating in step S23.Refrigerant-recovery operating is Pass through what cooling operation circulation was carried out after indoor expansion valve 22 is suitably adjusted aperture. Now, the valve 403 of the 3rd stop valve 40 is in open mode, and the valve 373 of hydraulic fluid side stop valve 37 is in Closed mode, the valve 383 of gas side stop valve 38 is in open mode.
The cold-producing medium of refrigerant-recovery unit 50 flows into port 51 via pipe 511 and the 3rd stop valve 40 Generally port 401 connects, and therefore, when carrying out cooling operation in this condition, high-pressure refrigerant can not flow To the usual port 371 of pent hydraulic fluid side stop valve 37, but towards the 3rd stop valve 40 opened Generally port 401 flows.As a result of which it is, the cold-producing medium in outdoor unit 30 flows into port via cold-producing medium 51 and flow into and be stored in refrigerant storage container 55.
The inside of refrigerant storage container 55 is high pressure, the gas componant of the cold-producing medium after gas-liquid separation via Connecting pipings 503 that top and the alternate port 53 of refrigerant storage container 55 are connected, pipe 531, liquid The maintenance port 372 of side stop valve 37 and enter hydraulic fluid side connection pipe arrangement 14.As a result of which it is, residue in The cold-producing medium of hydraulic fluid side connection pipe arrangement 14 is promptly delivered to indoor expansion valve 22 side.
It addition, in hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas side connection pipe arrangement 16 Cold-producing medium is sucked into the low-pressure side of compressor 31 from the usual port 381 of the gas side stop valve 38 opened, Therefore, it is transferred to the refrigerant amount of refrigerant storage container 55 from outdoor unit 30 and is added to outdoor unit 30 sides.That is, can obtain connect with hydraulic fluid side pipe arrangement 14, indoor heat converter 21 and gas side connection join Cold-producing medium in pipe 16 is recovered to the result that refrigerant storage container 55 is identical.
Then, control portion 80 heat-exchanger temperature sensor to indoor heat converter 21 in step s 24 Whether the detected value Th of 211 is in the first below setting Th1 judges, as Th≤Th1, advances To step S25, when not being Th≤Th1, proceed to judge.
Cold-producing medium is depressurized in indoor expansion valve 22, the period of evaporation in indoor heat converter 21, room The temperature of inside heat exchanger 21 can reduce, and therefore, connects pipe arrangement 14, indoor heat converter 21 in hydraulic fluid side And the period that the cold-producing medium in gas side connection pipe arrangement 16 exists, the inspection of heat-exchanger temperature sensor 211 Measured value can become the first below setting Th1, and control portion 80 can confirm that and carrying out refrigerant-recovery.
Then, control portion 80 carries out refrigerant-recovery operating, the most standby regulation in step s 25 Time.
Then, control portion 80 heat-exchanger temperature sensor to indoor heat converter 21 in step S26 Whether the detected value Th of 211 is in the second setting Th2 judgement carried out above, as Th >=Th2, advances To step S27, when not being Th >=Th2, proceed to judge.
Cold-producing medium is depressurized in indoor expansion valve 22, the period of evaporation in indoor heat converter 21, room The temperature of inside heat exchanger 21 can reduce, but when hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas Side connection pipe arrangement 16 in cold-producing medium no longer in the presence of, the temperature of indoor heat converter 21 can rise to room Near Wen, therefore, the detected value Th of heat-exchanger temperature sensor 211 can become the second setting Th2 Above, control portion 80 can judge that refrigerant-recovery terminates.
Therefore, as Th >=Th2, control portion 80 stops compressor in step s 27, and terminates refrigeration Operating is reclaimed in agent.
The feature of (3) second embodiments
In refrigerant-recovery unit 50, flow to the usual port 371 of the hydraulic fluid side stop valve 37 closed High-pressure refrigerant towards usual port 401 branch of the 3rd stop valve 40 opened and flow, outdoor unit Part of refrigerant in 30 is stored in refrigerant storage container 55.On the other hand, hydraulic fluid side connection pipe arrangement 14, the cold-producing medium that indoor heat converter 21 and gas side connect in pipe arrangement 16 is recovered to outdoor unit 30.
Therefore, connect with hydraulic fluid side in pipe arrangement 14, indoor heat converter 21 and gas side connection pipe arrangement 16 Refrigerant storage in refrigerant storage container 55 be identical.
＜ the 3rd embodiment ＞
In above-mentioned first embodiment and the second embodiment, refrigerant-recovery unit 50 does not fill self If compressor, but have employed following structure: utilize the compressor 31 in outdoor unit 30, by hydraulic fluid side Refrigerant-recovery in connection pipe arrangement 14, indoor heat converter 21 and gas side connection pipe arrangement 16 is to cold-producing medium Hold-up vessel 55.In the third embodiment, the refrigerant-recovery unit 150 of installing compressor is said Bright.
(1) structure of refrigerating plant 201
Fig. 7 is the refrigerating plant 201 that the refrigerant-recovery unit 150 with third embodiment of the invention is connected Loop diagram.
In the figure 7, in refrigerant-recovery unit 150, it is provided with connecting pipings 504, to replace first in fact Execute the connecting pipings 503 of refrigerant-recovery unit 50 in mode and the second embodiment.Connecting pipings 504 It it is the pipe that the top of refrigerant storage container 55 is connected with refrigerant outflow port 52.
Refrigerant-recovery compressor 61 is connected with this connecting pipings 504.Refrigerant-recovery compressor 61 Suction side be connected with the top of refrigerant storage container 55, discharge side is connected with refrigerant outflow port 52. Fig. 8 is the control block diagram of the 3rd embodiment, and refrigerant-recovery unit 150 self does not have control portion, But by the terminal connection part 801a of the wire harness of refrigerant-recovery unit 150 with control portion, outside 801 Connecting makes electromagnetic valve 59, refrigerant-recovery compressor 61 etc. by the management in control portion, outside 801.
The cold-producing medium of refrigerant-recovery unit 50 flows into port 51 via pipe 511 and hydraulic fluid side stop valve 37 Maintenance port 372 connect.The valve 373 of hydraulic fluid side stop valve 37 is closed.
It addition, the refrigerant outflow port 52 of refrigerant-recovery unit 50 ends with gas side via pipe 521 The maintenance port 382 of valve 38 connects.The valve 383 of gas side stop valve 38 is closed.It addition, in refrigeration When operating is reclaimed in agent, refrigerant outflow port 52 is closed.
Gas side preparation stop valve 39 and the 3rd stop valve 40 are not connected with any pipe arrangement.Other structure with Embodiment 1 is identical, therefore, omits the description.
(2) action of refrigerating plant 201
The cooling operation of refrigerating plant 201, the action heating operating and cold-producing medium return operating and the first enforcement Mode is identical, therefore, illustrates refrigerant-recovery operating herein.
Fig. 9 is the control flow chart of the refrigerant-recovery operating of the 3rd embodiment.In fig .9, in step In S41, whether control portion 80 is to having temperature sensor connection signal to judge.When refrigerant-recovery unit 150 are connected with outdoor unit 30, from wire harness and the control portion, outside 801 of refrigerant-recovery unit 150 Terminal connection part 801a when connecting, electric between the terminal of its internal terminal being connected with temperature sensor 81 Resistance changes, and therefore, this change becomes the signal of the connection representing temperature sensor 81, control portion 80 Judge to be connected to refrigerant-recovery unit 150 by control portion, outside 801.
Then, control portion 80 in step S42 to whether there being refrigerant-recovery operating to determine that signal is sentenced Fixed.Even if refrigerant-recovery unit 150 is connected with outdoor unit 30 and has inputted temperature sensor and connected letter Number, whether reality carries out refrigerant-recovery operating remains a need for the judgement of maintainer, therefore, finally by keeping in repair Personnel determine letter by the regulation input unit input in remote controller or the control portion, outside 801 of outdoor unit 30 Number.
Then, control portion 80 starts refrigerant-recovery operating in step S43.Refrigerant-recovery operating will Indoor expansion valve 22 is set to full-gear and makes refrigerant-recovery compressor 61 carry out action.Now, system Cryogen flows into port 51 and is connected with the maintenance port 372 of hydraulic fluid side stop valve 37, refrigerant outflow port 52 It is connected with the maintenance port 382 of gas side stop valve 38.The valve 373 of hydraulic fluid side stop valve 37 and gas side The valve 383 of stop valve 38 is all closed.
In this condition, refrigerant-recovery compressor 61 carries out action, therefore, gas side stop valve 38 Maintenance port 382 side be high pressure, maintenance port 372 side of hydraulic fluid side stop valve 37 is low pressure, Therefore, the cold-producing medium in hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas side connection pipe arrangement 16 Pushed by high pressure, and be forced out towards cold-producing medium inflow port 51 from maintenance port 372.
The cold-producing medium extruded from maintenance port 372 is stored in cold-producing medium storage via cold-producing medium inflow port 51 Deposit container 55.As a result of which it is, hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas side connection are joined Cold-producing medium in pipe 16 is recovered to refrigerant storage container 55.
Owing to including relief valve 83, this relief valve 83 pressure in refrigerant storage container 55 is in rule Opening action is carried out, so even just in case the intrinsic pressure generation of refrigerant storage container 55 is different time more than constant-pressure Often rise, in refrigerant storage container 55, also can be maintained safe pressure.
Then, whether control portion 80 is in regulation to the detected value T of temperature sensor 81 in step S44 Judge below value Tp, as T≤Tp, advance to step S5, when not being T≤Tp, continue into Row judges.
When carrying out refrigerant-recovery and cause the refrigerant amount in pipe arrangement to reduce, cold-producing medium evaporation and become gas Cryogen, therefore, the temperature flowing into the cold-producing medium that cold-producing medium flows into port 51 reduces.Temperature sensor 81 pairs of temperature flowing into the cold-producing medium that port 51 flows to refrigerant storage container 55 from cold-producing medium detect, Therefore, by whether this detected value is in below setting Tp judge, just can be to refrigerant-recovery End judge.
Therefore, as T≤Tp, control portion 80 stops compressor in step S45, and terminates cold-producing medium Reclaim operating.
The feature of (3) the 3rd embodiments
In refrigerant-recovery unit 150, by refrigerant-recovery with the action of compressor 61 by high pressure gas Cryogen is pressed into gas via the maintenance port 382 of gas side stop valve 38 from refrigerant outflow port 52 Side connection pipe arrangement 16, therefore, hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas side connection Liquid refrigerant in pipe arrangement 16 is pressed out to refrigeration via the maintenance port 372 of hydraulic fluid side stop valve 37 Agent flows into port 51.As a result of which it is, hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas side are even Liquid refrigerant in wildcard pipe 16 is recovered to refrigerant storage container 55.
＜ the 4th embodiment ＞
In the above-described 3rd embodiment, refrigerant-recovery unit 150 self is equiped with refrigerant-recovery pressure Contracting machine 61, but the condensation of cold-producing medium make use of indoor unit 20.In the 4th embodiment, to being equiped with The refrigerant-recovery unit 250 of condenser illustrates.
(1) structure of refrigerating plant 301
Figure 10 is the refrigerating plant that the refrigerant-recovery unit 250 with four embodiment of the invention is connected The loop diagram of 301.
In Fig. 10, in refrigerant-recovery unit 250, refrigerant-recovery compressor 61 and heat exchange Device 63 is connected with connecting pipings 504.Outlet pipe arrangement and the refrigerant storage container 55 of heat exchanger 63 End face connects.The refrigerant-recovery suction side of compressor 61 is connected with refrigerant outflow port 52 side, Discharge side is connected with the entrance pipe arrangement of heat exchanger 63.It addition, towards the fan 65 of heat exchanger 63 air-supply It is configured to relative with heat exchanger 63.
Figure 11 is the control block diagram of the 4th embodiment, and refrigerant-recovery unit 250 self does not have control Portion processed, it is by the terminal connection part of the wire harness of refrigerant-recovery unit 250 with control portion, outside 801 801a connects makes electromagnetic valve 59, refrigerant-recovery compressor 61 and fan 65 by control portion, outside 801 management.
The cold-producing medium of refrigerant-recovery unit 250 flows into port 51 via pipe 511 and hydraulic fluid side stop valve 37 Maintenance port 372 connect.The valve 373 of hydraulic fluid side stop valve 37 is closed.
It addition, the refrigerant outflow port 52 of refrigerant-recovery unit 250 cuts with gas side via pipe 521 Only the maintenance port 382 of valve 38 connects.The valve 383 of gas side stop valve 38 is closed.It addition, in system When cryogen reclaims operating, refrigerant outflow port 52 is closed.
Gas side preparation stop valve 39 and the 3rd stop valve are not connected with any pipe arrangement.Other structure and reality Execute mode 1 identical, therefore, omit the description.
(2) action of refrigerating plant 301
The cooling operation of refrigerating plant 301, the action heating operating and cold-producing medium return operating and the first enforcement Mode is identical, therefore, illustrates refrigerant-recovery operating herein.
Figure 12 is the control flow chart of the refrigerant-recovery operating of the 4th embodiment.In fig. 12, in step In rapid S61, whether control portion 80 is to having temperature sensor connection signal to judge.Work as refrigerant-recovery Unit 250 is connected with outdoor unit 30, and the wire harness from refrigerant-recovery unit 250 controls with outside When the terminal connection part 801a in portion 801 connects, the end of its internal terminal being connected with temperature sensor 81 Between son, resistance changes, and therefore, this change becomes the signal of the connection representing temperature sensor 81, control Portion 80 processed judges to be connected to refrigerant-recovery unit 250 by control portion, outside 801.
Then, control portion 80 in step S62 to whether there being refrigerant-recovery operating to determine that signal is sentenced Fixed.Even if refrigerant-recovery unit 250 is connected with outdoor unit 30 and has inputted temperature sensor and connected letter Number, whether reality carries out refrigerant-recovery operating remains a need for the judgement of maintainer, therefore, finally by keeping in repair Personnel determine letter by the regulation input unit input in remote controller or the control portion, outside 801 of outdoor unit 30 Number.
Then, control portion 80 starts refrigerant-recovery operating in step S63.Operate in refrigerant-recovery In, when indoor expansion valve 22 is moderately regulated aperture, make refrigerant-recovery compressor 61 Carry out action.Now, cold-producing medium flows into port 51 and is connected with the maintenance port 372 of hydraulic fluid side stop valve 37, Refrigerant outflow port 52 is connected with the maintenance port 382 of gas side stop valve 38.Hydraulic fluid side stop valve 37 Valve 373 and the valve 383 of gas side stop valve 38 be all closed.
In this condition, refrigerant-recovery compressor 61 carries out action, therefore, refrigerant outflow port 52 is low pressure, and it is high pressure that cold-producing medium flows into port.As a result of which it is, the maintenance port of gas side stop valve 38 382 sides are low pressure, and maintenance port 372 side of hydraulic fluid side stop valve 37 is high pressure, therefore, hydraulic fluid side Cold-producing medium in connection pipe arrangement 14, indoor heat converter 21 and gas side connection pipe arrangement 16 is pushed by high pressure, And be forced out towards refrigerant outflow port 52 from the maintenance port 382 of gas side stop valve 38.
Cold-producing medium in hydraulic fluid side connection pipe arrangement 14 is depressurized when flowing through indoor expansion valve 22, and in indoor Heat exchanger 21 evaporates, therefore, is in gas refrigerant state.It addition, before refrigerant-recovery operating The cold-producing medium after liquefying in pipe arrangement 16 is connected without flow through indoor expansion valve at indoor heat converter 21 and gas side 22, but evaporate during flowing to refrigerant-recovery compressor 61.
The cold-producing medium of the maintenance port 382 entering gas side stop valve 38 flows through refrigerant outflow port 52 And be sucked into refrigerant-recovery compressor 61 and compressed.Discharge from refrigerant-recovery compressor 61 Cold-producing medium in heat exchanger 63, carry out heat exchange with the air-flow produced by fan 65 and condense.After condensation Cold-producing medium be transported to refrigerant storage container 55 and stored.As a result of which it is, hydraulic fluid side connection is joined Cold-producing medium in pipe 14, indoor heat converter 21 and gas side connection pipe arrangement 16 is recovered to refrigerant storage Container 55.
Owing to including relief valve 83, this relief valve 83 pressure in refrigerant storage container 55 is in rule Opening action is carried out, so even just in case the intrinsic pressure generation of refrigerant storage container 55 is different time more than constant-pressure Often rise, in refrigerant storage container 55, also can be maintained safe pressure.
Then, control portion 80 heat-exchanger temperature sensor to indoor heat converter 21 in step S64 Whether the detected value Th of 211 is in the first below setting Th1 judges, as Th≤Th1, advances To step S65, when not being Th≤Th1, proceed to judge.
Cold-producing medium is depressurized in indoor expansion valve 22, the period of evaporation in indoor heat converter 21, room The temperature of inside heat exchanger 21 can reduce, and therefore, connects pipe arrangement 14, indoor heat converter 21 in hydraulic fluid side And the period that the cold-producing medium in gas side connection pipe arrangement 16 exists, the inspection of heat-exchanger temperature sensor 211 Measured value can become the first below setting Th1, and control portion 80 can confirm that and carrying out refrigerant-recovery.
Then, control portion 80 carries out refrigerant-recovery operating, the most standby regulation in step S65 Time.
Then, control portion 80 heat-exchanger temperature sensor to indoor heat converter 21 in step S66 Whether the detected value Th of 211 is in the second setting Th2 judgement carried out above, as Th >=Th2, advances To step S67, when not being Th >=Th2, proceed to judge.
Cold-producing medium is depressurized in indoor expansion valve 22, the period of evaporation in indoor heat converter 21, room The temperature of inside heat exchanger 21 can reduce, but when hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas Side connection pipe arrangement 16 in cold-producing medium no longer in the presence of, the temperature of indoor heat converter 21 can rise to room Near Wen, therefore, the detected value Th of heat-exchanger temperature sensor 211 can become the second setting Th2 Above, control portion 80 can judge that refrigerant-recovery terminates.
Therefore, as Th >=Th2, control portion 80 stops compressor in step S67, and terminates refrigeration Operating is reclaimed in agent.
The feature of (3) the 4th embodiments
In refrigerant-recovery unit 250, by the refrigerant-recovery operating of compressor 61, gas side Cold-producing medium in connection pipe arrangement 16, indoor heat converter 21 and hydraulic fluid side connection pipe arrangement 14 ends from gas side The maintenance port 382 of valve 38 is sucked into refrigerant-recovery compressor via refrigerant outflow port 52 61.In refrigerant-recovery compressor 61, the cold-producing medium after compression is carried towards heat exchanger 63, is condensed And it is stored in refrigerant storage container 55.
Cold-producing medium flows into port 51 and is connected with the maintenance port 372 of hydraulic fluid side stop valve 37, this cold-producing medium stream Inbound port 51 is connected with refrigerant storage container 55, therefore, and the maintenance port 372 of hydraulic fluid side stop valve 37 For high pressure.Therefore, hydraulic fluid side connection pipe arrangement 14, indoor heat converter 21 and gas side connection pipe arrangement 16 Interior residual refrigerant is forced out in the way of flowing to maintenance port 382 side of gas side stop valve 38. As a result of which it is, the system in gas side connection pipe arrangement 16, indoor heat converter 21 and hydraulic fluid side connection pipe arrangement 14 Cryogen is promptly recycled to refrigerant storage container 55.
Other ＞ of ＜
It is filled in the cold-producing medium of refrigerant loop 10 it is of course possible to use the mix refrigerants such as R401, R407C, But the unitary system cryogens such as R32, R22 can also be used.
In the case of using the unitary system cryogens such as R32, R22, can give play to and easily recycle such effect Really.
Industrial utilizability
According to the present invention, only by being installed on outdoor unit by additional for refrigerant-recovery unit, room just can be reclaimed Interior unit and the cold-producing medium of connection pipe arrangement, accordingly, it is capable to be widely used in air conditioner.

Claims (13)

1. a refrigerant-recovery unit (50), be temporarily mounted to refrigerating plant and carry out refrigerant-recovery and Cold-producing medium returns, and wherein, described refrigerating plant utilizes indoor unit (20), outdoor unit (30) and by described What indoor unit (20) connected with described outdoor unit (30) connects pipe arrangement (14,16) composition refrigerant loop,
Described refrigerant-recovery unit (50) is characterised by, including:
Cold-producing medium flow into port (51), this cold-producing medium flow into port (51) when refrigerant-recovery with described refrigeration The pressure duct in agent loop connects；
Refrigerant outflow port (52), this refrigerant outflow port (52) when cold-producing medium returns with described refrigeration The low pressure line in agent loop connects；
Refrigerant storage container (55), this refrigerant storage container (55) flows into port to flowing into described cold-producing medium (51) cold-producing medium is stored；And
The mechanism of decompressor (56), this mechanism of decompressor (56) is connected to described refrigerant storage container (55) and described system Cryogen flows out between port (52).
2. refrigerant-recovery unit (50) as claimed in claim 1, it is characterised in that
Described refrigerant-recovery unit (50) also includes temperature sensor (81), and this temperature sensor (81) is direct Or indirectly to the refrigeration flowing to described refrigerant storage container (55) from described cold-producing medium inflow port (51) The temperature of agent detects.
3. refrigerant-recovery unit (50) as claimed in claim 1, it is characterised in that
Described refrigerant-recovery unit (50) also includes that electromagnetic valve (59), this electromagnetic valve (59) subtract described in being connected to Between press mechanism (56) and described refrigerant outflow port (52).
4. refrigerant-recovery unit (50) as claimed in claim 1, it is characterised in that
Described refrigerant-recovery unit (50) also includes relief valve (83), and this relief valve (83) is at described cold-producing medium Pressure in hold-up vessel (55) carries out opening action when being in more than authorized pressure.
5. the refrigerant-recovery unit (50) as according to any one of Claims 1-4, it is characterised in that
Described outdoor unit (30) including:
Compressor (31)；
First stop valve (37), this first stop valve (37) has first be connected with the first connection pipe arrangement (14) Port (371) and connect the first maintenance port (372) that pipe arrangement (14) connects with described first, wherein said the One connection pipe arrangement (14) is connected with described indoor unit (20) and cold-producing medium flows through for liquid；
Second stop valve (38), this second stop valve (38) has second be connected with the second connection pipe arrangement (16) Port (381), wherein said second connection pipe arrangement (16) is connected with described indoor unit (20) and supplies system Cryogen flows through；And
Switching valve (32), this switching valve (32) makes to flow to described first from the high-pressure refrigerant of described compressor Described first port (371) of stop valve (37) or described second port of described second stop valve (38) (381),
Described cold-producing medium flows into port (51) and is connected, at described first end with described first maintenance port (372) Under the state that mouth (371) is closed, described second port (381) is opened, carry out making described high-pressure refrigerant flow Operating to described second port (381).
6. the refrigerant-recovery unit (50) as according to any one of Claims 1-4, it is characterised in that
Described outdoor unit (30) including:
Compressor (31)；
First stop valve (37), this first stop valve (37) has first be connected with the first connection pipe arrangement (14) Port (371), wherein said first connection pipe arrangement (14) is connected with described indoor unit (20) and feed flow system Cryogen flows through；
Second stop valve (38), this second stop valve (38) has second be connected with the second connection pipe arrangement (16) Port (381), wherein said second connection pipe arrangement (16) is connected with described indoor unit (20) and supplies system Cryogen flows through；
3rd stop valve (40), the 3rd stop valve (40) has the 3rd port (401), the 3rd port (401) Make to flow to the refrigerant branch of described first port (371) of described first stop valve (37)；And
Switching valve (32), this switching valve (32) makes to flow to described from the high-pressure refrigerant of described compressor (31) Described first port (371) of the first stop valve (37) or described second port of described second stop valve (38) (381),
Described cold-producing medium flows into port (51) and is connected with described 3rd port (401), at described first port (371), under the state that closedown, described second port (381) and described 3rd port (401) are opened, make Described high-pressure refrigerant flows to the operating of described first port (371).
7. the refrigerant-recovery unit (50) as according to any one of Claims 1-4, it is characterised in that
Described refrigerant-recovery unit (50) also includes refrigerant-recovery compressor (61), this refrigerant-recovery Being connected with the end face of described refrigerant storage container (55) with the suction side of compressor (61), discharge side is with described Refrigerant outflow port (52) side connects,
Described outdoor unit (30) has:
First stop valve (37), this first stop valve (37) has first be connected with the first connection pipe arrangement (14) Port (371) and connect the first maintenance port (372) that pipe arrangement (14) connects with described first, wherein said the One connection pipe arrangement (14) is connected with described indoor unit (20) and cold-producing medium flows through for liquid；And
Second stop valve (38), this second stop valve (38) has second be connected with the second connection pipe arrangement (16) Port (381) and connect the second maintenance port (382) that pipe arrangement (16) connects with described second, wherein said the Two connections pipe arrangement (16) are connected with described indoor unit (20) and supplied gas cold-producing medium flows through,
Described cold-producing medium flows into port (51) and is connected with described first maintenance port (372), described cold-producing medium stream Go out port (52) to be connected, described first port (371) and described second with described second maintenance port (382) Under the state that port (381) is closed, described refrigerant-recovery compressor (61) is made to operate.
8. the refrigerant-recovery unit (50) as according to any one of Claims 1-4, it is characterised in that Also include:
Heat exchanger (63), the outlet pipe arrangement of this heat exchanger (63) and described refrigerant storage container (55) End face connect；
Pressure fan (65), this pressure fan (65) is blown towards described heat exchanger (63)；And
Refrigerant-recovery compressor (61), the suction side of this refrigerant-recovery compressor (61) and described system Cryogen flows out port (52) side and connects, and discharge side is connected with the entrance pipe arrangement of described heat exchanger (63),
Described outdoor unit (30) has:
First stop valve (37), this first stop valve (37) has first be connected with the first connection pipe arrangement (14) Port (371) and connect the first maintenance port (372) that pipe arrangement (14) connects with described first, wherein said the One connection pipe arrangement (14) is connected with described indoor unit (20) and cold-producing medium flows through for liquid；And
Second stop valve (38), this second stop valve (38) has second be connected with the second connection pipe arrangement (16) Port and connect the second maintenance port that pipe arrangement (16) connects with described second, wherein said second connection pipe arrangement (16) it is connected with described indoor unit (20) and supplied gas cold-producing medium flows through,
Described cold-producing medium flows into port (51) and is connected with described first maintenance port (372), described cold-producing medium stream Go out port (52) to be connected, described first port (371) and described second with described second maintenance port (382) Under the state that port (381) is closed, described refrigerant-recovery compressor (61) is made to operate.
9. an outdoor unit (30), is to be connected with the refrigerant-recovery unit (50) described in claim 2 Outdoor unit (30), it is characterised in that
Described outdoor unit (30) includes control portion (80), and this control portion (80) performs refrigerant-recovery to institute State the refrigerant-recovery operation mode of refrigerant storage container (55),
Described control portion (80) has the connecting portion being connected with described temperature sensor (81), and when being judged to institute State temperature sensor (81) when being connected with described connecting portion, perform described refrigerant-recovery operation mode.
10. outdoor unit (30) as claimed in claim 9, it is characterised in that
Described refrigerant loop as described in the cold-producing medium of object that returns of refrigerant-recovery and cold-producing medium be R32。
11. 1 kinds of outdoor units (30), are to be connected with the refrigerant-recovery unit (50) described in claim 3 Outdoor unit (30), it is characterised in that
Described outdoor unit (30) includes control portion (80), and this control portion (80) performs to make cold-producing medium from described system Cryogen hold-up vessel (55) is back to the cold-producing medium of described refrigerant loop and returns operation mode,
Described control portion (80) has the connecting portion being connected with described electromagnetic valve (59), and when being judged to described electricity When magnet valve (59) is connected with described connecting portion, performs described cold-producing medium and return operation mode.
12. outdoor units (30) as claimed in claim 11, it is characterised in that
Described refrigerant loop as described in the cold-producing medium of object that returns of refrigerant-recovery and cold-producing medium be R32。
13. 1 kinds of outdoor units (30), be and the system according to any one of claim 1 to claim 8 The outdoor unit (30) that cryogen recovery unit (50) connects, it is characterised in that
Described refrigerant loop as described in the cold-producing medium of object that returns of refrigerant-recovery and cold-producing medium be R32。
CN201510102367.9A 2015-03-09 2015-03-09 Refrigerant recovery unit and outdoor unit connected to the same Active CN106032955B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111397082A (en) * 2020-04-01 2020-07-10 宁波奥克斯电气股份有限公司 Refrigerant recovery system and control method
CN111479899A (en) * 2017-12-18 2020-07-31 大金工业株式会社 Heat exchange unit
CN111473568A (en) * 2019-01-23 2020-07-31 青岛海尔电冰箱有限公司 Refrigerator with a door

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1172241A (en) * 1996-06-04 1998-02-04 合泽仁吉 Heat exchanger, method of reusing and recovering refrigerant thereof
JP2010002101A (en) * 2008-06-19 2010-01-07 Mitsubishi Electric Corp Refrigerating cycle device, and refrigerant filling method and refrigerant recovering method for refrigerating cycle device
CN201724485U (en) * 2010-03-12 2011-01-26 神旺工业有限公司 Electronic instrument of refrigerant recovery machine
CN202835963U (en) * 2012-07-31 2013-03-27 宝钢发展有限公司 Air-conditioning refrigerant recycling and adding device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1172241A (en) * 1996-06-04 1998-02-04 合泽仁吉 Heat exchanger, method of reusing and recovering refrigerant thereof
JP2010002101A (en) * 2008-06-19 2010-01-07 Mitsubishi Electric Corp Refrigerating cycle device, and refrigerant filling method and refrigerant recovering method for refrigerating cycle device
CN201724485U (en) * 2010-03-12 2011-01-26 神旺工业有限公司 Electronic instrument of refrigerant recovery machine
CN202835963U (en) * 2012-07-31 2013-03-27 宝钢发展有限公司 Air-conditioning refrigerant recycling and adding device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111479899A (en) * 2017-12-18 2020-07-31 大金工业株式会社 Heat exchange unit
CN111473568A (en) * 2019-01-23 2020-07-31 青岛海尔电冰箱有限公司 Refrigerator with a door
CN111397082A (en) * 2020-04-01 2020-07-10 宁波奥克斯电气股份有限公司 Refrigerant recovery system and control method
CN111397082B (en) * 2020-04-01 2021-10-26 宁波奥克斯电气股份有限公司 Refrigerant recovery system and control method

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