CN104736951A - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
CN104736951A
CN104736951A CN201280076455.0A CN201280076455A CN104736951A CN 104736951 A CN104736951 A CN 104736951A CN 201280076455 A CN201280076455 A CN 201280076455A CN 104736951 A CN104736951 A CN 104736951A
Authority
CN
China
Prior art keywords
heat
running
defrosting
outdoor
indoor
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201280076455.0A
Other languages
Chinese (zh)
Other versions
CN104736951B (en
Inventor
本田雅裕
松本圭弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Europe NV
Daikin Industries Ltd
Original Assignee
Daikin Europe NV
Daikin Industries Ltd
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Publication of CN104736951A publication Critical patent/CN104736951A/en
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Publication of CN104736951B publication Critical patent/CN104736951B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/021—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02742—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using two four-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0314—Temperature sensors near the indoor heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/031—Sensor arrangements
    • F25B2313/0315—Temperature sensors near the outdoor heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/24—Storage receiver heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2507—Flow-diverting valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1933—Suction pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2104—Temperatures of an indoor room or compartment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

An air conditioner (1): is provided with a compressor (21), an outdoor heat exchanger (23), indoor heat exchangers (42a, 42b), and a refrigerant circuit (10) having a stored-heat heat exchanger (28) that exchanges heat between a refrigerant and a thermal storage material; and is capable of performing a heat storage operation, and simultaneously performing a stored-heat utilization operation and a heating operation during a defrosting operation. In the air conditioner (1), for a defrosting operation accompanying the stored-heat utilization operation, the defrosting capacity of the outdoor heat exchanger (23) is changed on the basis of the outdoor temperature of an external space in which the outdoor heat exchanger (23) is disposed, and/or an outdoor heat exchange outlet temperature, which is the temperature of refrigerant at the outlet of the outdoor heat exchanger (23) at the completion of the previous defrosting operation, or the time required for the previous defrosting operation.

Description

Aircondition
Technical field
The present invention relates to a kind of aircondition, particularly relate to following this aircondition, this aircondition comprises refrigerant loop, this refrigerant loop has the heat-storage heat exchanger making to carry out heat exchange between cold-producing medium and heat-storing material, this aircondition carries out accumulation of heat running, and can accumulation of heat utilization running be carried out when defrosting running simultaneously and heat running, wherein above-mentioned accumulation of heat running refers to by making heat-storage heat exchanger play function as the radiator of cold-producing medium and carries out the running of accumulation of heat to heat-storing material, described accumulation of heat utilizes running to refer to by making heat-storage heat exchanger carry out the running of dispelling the heat as the evaporimeter performance function of cold-producing medium from heat-storing material.
Background technology
As shown in patent document 1 (Japanese Unexamined Patent Publication 2005-337657 publication), there is one always and comprise refrigerant loop, and can accumulation of heat running be carried out, and accumulation of heat can be carried out when defrosting running simultaneously and utilize running and heat the aircondition of running, above-mentioned refrigerant loop has compressor, outdoor heat converter, indoor heat converter and between cold-producing medium and heat-storing material, carries out the heat-storage heat exchanger of heat exchange.At this, accumulation of heat running refers to by making heat-storage heat exchanger play function as the radiator of cold-producing medium and carries out the running of accumulation of heat to heat-storing material.Defrosting running refers to by making outdoor heat converter play function as the radiator of cold-producing medium and carries out the running of the defrosting of outdoor heat converter.Accumulation of heat utilizes running to refer to by making heat-storage heat exchanger carry out the running of dispelling the heat as the evaporimeter performance function of cold-producing medium from heat-storing material.Heating running is instigate indoor heat converter as the running of the radiator performance function of cold-producing medium.
Summary of the invention
In above-mentioned aircondition in the past, when carrying out utilizing the defrosting of running running with accumulation of heat, the defrosting ability of required outdoor heat converter is different because arranging the meteorological condition (degree of outdoor temperature, humidity and snowfall) in the area of aircondition etc.For the difference of this defrosting ability caused by the meteorological condition etc. in area, consider hypothesis as cold district in the meteorological condition etc. carrying out requiring when utilizing the defrosting running of running with accumulation of heat the strongest defrosting ability, decide to comprise the specification of the heat-storage heat exchanger of the capacity of heat-storing material etc.
But the method for the decision of the specification of this heat-storage heat exchanger needs jumbo heat-storing material, the impact of the size of heat-storage heat exchanger, weight and cost is increased.In addition, when aircondition is arranged on cold district, there is the specification of the aircondition of heat-storage heat exchanger just for being arranged at cold district, but when aircondition is arranged on warm area, the specification with the aircondition of heat-storage heat exchanger is superfluous.
Certainly, if prepare the abundant aircondition with multiple specifications of heat-storage heat exchanger by area, then can tackle the setting in extensive area, but specification is abundant, it is unfavorable correspondingly to strengthen the decline of productivity ratio or the rising of cost etc.
The technical problem that will solve of the present invention is, a kind of aircondition is provided, this aircondition comprises refrigerant loop, this refrigerant loop has the heat-storage heat exchanger carrying out heat exchange between cold-producing medium and heat-storing material, this aircondition carries out accumulation of heat running, and can accumulation of heat utilization running be carried out when defrosting running simultaneously and heat running, the heat-storage heat exchanger of the heat-storing material with specified vol can be utilized to tackle the setting in extensive area.
The aircondition of the first technical scheme comprises refrigerant loop, this refrigerant loop has compressor, outdoor heat converter, indoor heat converter and between cold-producing medium and heat-storing material, carries out the heat-storage heat exchanger of heat exchange, this aircondition can carry out accumulation of heat running, and when defrosting running, accumulation of heat be carried out simultaneously and utilize running and heat running.At this, accumulation of heat running refers to by making heat-storage heat exchanger play function as the radiator of cold-producing medium and carries out the running of accumulation of heat to heat-storing material.Defrosting running refers to by making outdoor heat converter play function as the radiator of cold-producing medium and carries out the running of the defrosting of outdoor heat converter.Accumulation of heat utilizes running to refer to by making heat-storage heat exchanger carry out the running of dispelling the heat as the evaporimeter performance function of cold-producing medium from heat-storing material.Heating running is instigate indoor heat converter as the running of the radiator performance function of cold-producing medium.And, in this aircondition, utilizing in the defrosting running of running with accumulation of heat, temperature, the i.e. outdoor heat exchange outlet temperature of the cold-producing medium of the outlet of the outdoor heat converter at the end of operating based on the outdoor temperature and/or previous defrosting that supply the space outerpace of outdoor heat converter configuration or the time needed for previous defrosting running, change the defrosting ability of outdoor heat converter.
At this, utilizing in the defrosting running of running with accumulation of heat, based on the outdoor heat exchange outlet temperature at the end of outdoor temperature and/or previous defrosting running or the time needed for previous defrosting running, change needing the defrosting ability of the outdoor heat converter changed according to the meteorological condition etc. in the area arranging aircondition.Therefore, utilizing in the defrosting running of running with accumulation of heat, the defrosting ability of outdoor heat converter can be made to tackle the meteorological condition etc. in the area that aircondition is set by the square.
Thus, at this, as the meteorological condition etc. that the defrosting ability of outdoor heat converter can be made to tackle the area arranging aircondition by the square, the heat-storage heat exchanger of the heat-storing material with specified vol can be utilized to deal with area widely.
The aircondition of the second technical scheme is on the basis of the aircondition of the first technical scheme, in the above-mentioned defrosting running utilizing running with above-mentioned accumulation of heat, above-mentioned outdoor heat exchange outlet temperature at the end of requiring to carry out based on above-mentioned outdoor temperature and/or previous above-mentioned defrosting running or the time needed for previous above-mentioned defrosting running are when increasing the change of defrosting ability of above-mentioned outdoor heat converter, carry out above-mentionedly heating running simultaneously, and reduce the heating capacity of above-mentioned indoor heat converter.
When carrying out heating running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, a part for the defrosting ability of outdoor heat converter is used as the heating capacity of indoor heat converter.Now, even if need the defrosting ability improving outdoor heat converter, when maintaining the heating capacity of indoor heat converter, the defrosting ability of outdoor heat converter also may be made insufficient.
So, at this, as mentioned above, when when carrying out heating running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, when requiring the change carrying out the defrosting ability increasing outdoor heat converter, the heating capacity of indoor heat converter is reduced.
Thus, at this, utilizing in the defrosting running of running with accumulation of heat, proceed to heat running as far as possible, and guaranteeing the defrosting ability of outdoor heat converter.
The aircondition of the 3rd technical scheme is on the basis of the aircondition of the second technical scheme, when when carrying out heating running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, based on the outdoor heat exchange outlet temperature at the end of outdoor temperature and/or previous defrosting running or the time needed for previous defrosting running, change the interval time between defrosting running.
When outdoor heat exchange outlet temperature when outdoor temperature is lower, at the end of previous defrosting running is lower and when the previous time needed for defrosting running is longer, it is desirable that carry out defrosting running continually and carry out defrosting running well.
So, at this, as mentioned above, based on the outdoor heat exchange outlet temperature at the end of outdoor temperature and/or previous defrosting running or the time needed for previous defrosting running, the interval time between defrosting running is changed.Such as, when outdoor heat exchange outlet temperature when outdoor temperature is lower, at the end of previous defrosting running is lower and when the previous time needed for defrosting running is longer, carry out making defrosting operate between the change shortened interval time.
Thus, at this, the frequency of defrosting running can be changed as required, the defrosting running utilizing running with accumulation of heat can be carried out well.
The aircondition of the 4th technical scheme is on the basis of the aircondition of the second technical scheme or the 3rd technical scheme, utilizing in the defrosting running of running with accumulation of heat, outdoor heat exchange outlet temperature at the end of requiring to carry out based on outdoor temperature and/or previous defrosting running or the time needed for previous defrosting running are when increasing the change of defrosting ability of outdoor heat converter further, stop to the supply system cryogen in indoor heat converter, and carry out the defrosting of outdoor heat converter.
When carrying out heating running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, sometimes only by reducing the heating capacity of indoor heat converter, time needed for outdoor heat exchange outlet temperature at the end of outdoor temperature reduction or previous defrosting may be caused to operate reduces or previous defrosting operates is elongated, can not realize the defrosting ability of outdoor heat converter.
So, at this, as mentioned above, utilizing in the defrosting running of running with accumulation of heat, when requiring the change of the defrosting ability increasing outdoor heat converter further, stop, to indoor heat converter the supply system cryogen, carrying out the defrosting of outdoor heat converter.
Thus, at this, utilizing in the defrosting running of running with accumulation of heat, when only the defrosting ability of outdoor heat converter can not be realized by the heating capacity reducing indoor heat converter, do not carry out heating the defrosting ability that running just can guarantee outdoor heat converter.
The aircondition of the 5th technical scheme is on the basis of the aircondition of the 4th technical scheme, in the above-mentioned defrosting running utilizing running with above-mentioned accumulation of heat, above-mentioned outdoor heat exchange outlet temperature at the end of requiring to carry out based on above-mentioned outdoor temperature and/or previous above-mentioned defrosting running or the time needed for previous above-mentioned defrosting running, when the change of the defrosting ability of the above-mentioned outdoor heat converter of further increase, carry out communicating pipe recuperation of heat running and/or indoor heat converter recuperation of heat running, wherein, above-mentioned communicating pipe recuperation of heat running refers to the running that the heat possessed refrigerant pipe reclaims, this refrigerant pipe is connected between indoor heat converter with compressor, above-mentioned indoor heat converter recuperation of heat running refers to the running by making above-mentioned indoor heat converter reclaim the heat that cold-producing medium obtains as the evaporimeter performance function of cold-producing medium.
Utilizing in the defrosting running of running with accumulation of heat, sometimes only by stopping to indoor heat converter the supply system cryogen (namely, stop carrying out heating running), time needed for outdoor heat exchange outlet temperature at the end of outdoor temperature reduction or previous defrosting may be caused to operate reduces or previous defrosting operates is elongated, can not realize the defrosting ability of outdoor heat converter.
So, at this, as mentioned above, utilizing in the defrosting running of running with accumulation of heat, when requiring to increase the change of defrosting ability of outdoor heat converter further, stop carrying out heating running, and carry out communicating pipe recuperation of heat running and/or indoor heat converter recuperation of heat running.
Thus, at this, with accumulation of heat utilize running defrosting running in, even if when only by stop heat running can not realize the defrosting ability of outdoor heat converter, also can guarantee the defrosting ability of outdoor heat converter.
The aircondition of the 6th technical scheme is on the basis of the aircondition of the 5th technical scheme, this aircondition is also provided with the indoor fan supplying air to indoor heat converter, and indoor heat converter recuperation of heat running has the first indoor heat converter recuperation of heat running not making indoor fan operate and the second indoor heat converter recuperation of heat running that indoor fan is operated.
At this, operate as indoor heat converter recuperation of heat, there is the first indoor heat converter recuperation of heat running and the second indoor heat converter recuperation of heat running, in above-mentioned first indoor heat converter recuperation of heat running, indoor fan is not made to operate, suppress the impact on air conditioned spaces, and reclaim heat in heat exchanger indoor, in above-mentioned second indoor heat converter recuperation of heat running, although by making indoor fan operate and the impact that increases air conditioned spaces, can reclaim and operate many heats than the first indoor heat converter recuperation of heat.Therefore, when the degree of the defrosting ability of the outdoor heat converter required is less, the first indoor heat converter recuperation of heat running can be carried out, in the more situation of the defrosting ability of the outdoor heat converter required, the second indoor heat converter recuperation of heat running can be carried out.
Thus, at this, the two kinds of indoor heat converter recuperation of heat runnings using the degree of recuperation of heat different can be separated as required, guarantee the defrosting ability of outdoor heat converter.
The aircondition of the 7th technical scheme is on the basis of the aircondition of the 5th technical scheme or the 6th technical scheme, utilizing in the defrosting running of running with accumulation of heat, when carrying out communicating pipe recuperation of heat running and/or indoor heat converter recuperation of heat running, at the end of accumulation of heat running, all carry out defrosting running.
When carrying out recuperation of heat running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, it is desirable that carry out defrosting running continually, and in the accumulation of heat running carried out before defrosting running, carry out accumulation of heat to heat-storing material fully.
So, at this, as mentioned above, when when carrying out recuperation of heat running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, at the end of accumulation of heat running, defrosting running is all carried out.Therefore, can defrosting running before accumulation of heat running in reliably to heat-storing material accumulation of heat, and by omit accumulation of heat running after heat running, can shorten defrost operate between interval time.
Thus, at this, when when carrying out recuperation of heat running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, the frequency of defrosting running can be increased, and utilize the heat of the heat-storing material of fully accumulation, carry out the defrosting running utilizing running with accumulation of heat well.
On the basis of aircondition aircondition of arbitrary technical scheme in the 5th technical scheme ~ the 7th technical scheme of the 8th technical scheme, this aircondition is provided with recuperation of heat running setting member, this recuperation of heat running setting member is used for being set as follows item, namely, utilizing in the defrosting running of running with accumulation of heat, allowing or forbid carrying out communicating pipe recuperation of heat running and/or indoor heat converter recuperation of heat running.
At this, recuperation of heat running setting member can be utilized to be set in utilizing in the defrosting running of running with accumulation of heat is carry out simultaneously or forbid carrying out recuperation of heat running.Further, such as, at cold district, the setting implementing to carry out recuperation of heat running in the defrosting of running running can utilized with accumulation of heat, in warm area, the setting not carrying out recuperation of heat running can implemented in the defrosting running with accumulation of heat utilization running.
Thus, at this, can set whether carry out recuperation of heat running according to the meteorological condition etc. in the area arranging aircondition.
The aircondition of the 9th technical scheme is on the basis of the aircondition of the 8th technical scheme, and recuperation of heat running setting member can set communicating pipe recuperation of heat running, the first indoor heat converter recuperation of heat running and the second indoor heat converter recuperation of heat running respectively in utilizing the defrosting of running to operate with accumulation of heat.
At this, also can when utilize with accumulation of heat carry out recuperation of heat running in the defrosting of running running simultaneously, utilize recuperation of heat to operate setting member setting carries out in three kinds of recuperations of heat running which.
Thus, at this, also can set to carry out which recuperation of heat running according to the meteorological condition etc. in the area arranging aircondition.
Accompanying drawing explanation
Fig. 1 is the summary construction diagram of the aircondition of one embodiment of the present invention.
Fig. 2 is the summary construction diagram of heat-storage heat exchanger.
Fig. 3 is the control block diagram of aircondition.
Fig. 4 is the figure of the flowing of the cold-producing medium represented in the refrigerant loop in cooling operation.
Fig. 5 is the figure of the flowing of the cold-producing medium represented in the refrigerant loop that heats in running.
Fig. 6 is the figure of the flowing of the cold-producing medium represented in the refrigerant loop in accumulation of heat running (heating accumulation of heat running during running).
Fig. 7 is the figure of the flowing of the cold-producing medium represented in the refrigerant loop in defrosting running (utilizing the defrosting running of running with accumulation of heat).
Fig. 8 is the table of the defrosting operation mode of defrosting ability for changing outdoor heat converter.
Fig. 9 is the flow chart of the defrosting operation mode of defrosting ability for changing outdoor heat converter.
Figure 10 is the table of the defrosting operation mode of the defrosting ability of outdoor heat converter for changing variation 1.
Figure 11 is the table of the defrosting operation mode of the defrosting ability of outdoor heat converter for changing variation 2.
Figure 12 is the flow chart of the defrosting operation mode of the defrosting ability of outdoor heat converter for changing variation 2.
Figure 13 is the control block diagram of the aircondition of variation 2.
Figure 14 is the figure of flowing of the cold-producing medium in the refrigerant loop in the defrosting running (utilizing the defrosting running of running with accumulation of heat) of the pattern 4 representing variation 2.
Figure 15 is the figure of flowing of the cold-producing medium in the refrigerant loop in the defrosting running (utilizing the defrosting running of running with accumulation of heat) of the pattern 5,6 representing variation 2.
Detailed description of the invention
Below, be described based on the embodiment of accompanying drawing to aircondition of the present invention.In addition, the concrete structure of the embodiment of aircondition of the present invention is not limited to following embodiment and variation thereof, can change in the scope of purport not departing from invention.
(1) basic structure of aircondition
Fig. 1 is the summary construction diagram of the aircondition 1 of one embodiment of the present invention.Aircondition 1 is kind of refrigeration cycle running by carrying out steam compression type and the device carrying out air conditioning within doors that is used to building etc.Mainly through outdoor unit 2 is connected with multiple stage (in this case two) indoor unit 4a, 4b and forms aircondition 1.At this, outdoor unit 2 and multiple stage indoor unit 4a, 4b linked together via liquid refrigerant communicating pipe 6 and gas refrigerant communicating pipe 7.That is, by making outdoor unit 2 and multiple stage indoor unit 4a, 4b link together via cold-producing medium communicating pipe 6,7, the refrigerant loop 10 of the steam compression type of aircondition 1 is formed.
< indoor unit >
Indoor unit 4a, 4b are disposed in the interior.Indoor unit 4a, 4b were connected with outdoor unit 2 via cold-producing medium communicating pipe 6,7, and formed a part for refrigerant loop 10.
Next, the structure of indoor unit 4a, 4b is described.In addition, indoor unit 4b has the structure same with indoor unit 4a, therefore the structure of indoor unit 4a is described, about the structure of indoor unit 4b at this, mark the footmark a that footmark b replaces each several part representing indoor unit 4a respectively, omit the explanation to each several part.
Indoor unit 4a mainly has the indoor refrigerant loop 10a (being indoor refrigerant loop 10b in indoor unit 4b) of the part forming refrigerant loop 10.Indoor refrigerant loop 10a mainly has indoor expansion valve 41a and indoor heat converter 42a.
Indoor expansion valve 41a is the cold-producing medium decompression thus the valve changed the flow of the cold-producing medium flowed in indoor heat converter 42a that make to flow in the refrigerant loop 10a of indoor.Indoor expansion valve 41a is the electric expansion valve be connected with the hydraulic fluid side of indoor heat converter 42a.
Indoor heat converter 42a is such as made up of the fin tube type heat exchanger of cross-fin formula.The indoor fan 43a for being transported to by room air in indoor heat converter 42a is provided with near indoor heat converter 42a.By carrying room air with indoor fan 43a to indoor heat converter 42a, make to carry out heat exchange between cold-producing medium and room air in indoor heat converter 42a.Indoor fan motor 44a drive chamber internal fan 43a is utilized to rotate.Thus, indoor heat converter 42a plays function as the radiator of cold-producing medium and the evaporimeter of cold-producing medium.
In addition, in indoor unit 4a, various sensors is provided with.The hydraulic fluid side temperature sensor 45a that the temperature Trla of the cold-producing medium of liquid condition or gas-liquid two-phase state is detected is provided with in the hydraulic fluid side of indoor heat converter 42a.The gas side temperature sensor 46a that the temperature Trga of the cold-producing medium of gaseous state is detected is provided with at the gas side of indoor heat converter 42a.The suction inlet side of the room air of indoor unit 4a is provided with indoor temperature transmitter 47a, and the temperature (that is, indoor temperature Tra) of this indoor temperature transmitter 47a to the room air of the air conditioning object space of indoor unit 4a detects.In addition, indoor unit 4a has the indoor control part 48a controlled the action of each several part forming indoor unit 4a.And, indoor control part 48a has the microcomputer and memory etc. that arrange to control indoor unit 4a, can and for operate indoor unit 4a individually remote controllers 49a between carry out the exchange of control signal etc., and can and outdoor unit 2 between carry out the exchange of control signal etc.In addition, remote controllers 49a is that user carries out the various setting relevant to operation of air conditioner and the equipment of running/halt instruction.
< outdoor unit >
Outdoor unit 2 is arranged without.Outdoor unit 2 was connected with indoor unit 4a, 4b via cold-producing medium communicating pipe 6,7, and formed a part for refrigerant loop 10.
Next, the structure of outdoor unit 2 is described.
Outdoor unit 2 mainly has the outside refrigerant loop 10c of the part forming refrigerant loop 10.This outside refrigerant loop 10c mainly has compressor 21, first switching mechanism 22, outdoor heat converter 23, outdoor expansion valve 24, second switching mechanism 27, heat-storage heat exchanger 28 and accumulation of heat expansion valve 29.
Compressor 21 is the hermetic type compressors of the air compressor motor 20 containing not shown compressing member and drive compressing member to rotate in housing.Supply electric power by not shown DC-to-AC converter to air compressor motor 20, air compressor motor 20 changes by making the frequency (that is, rotating speed) of DC-to-AC converter, can change running capacity.
First switching mechanism 22 is four-way switching valves of the flow direction for switching cold-producing medium.When the radiator making outdoor heat converter 23 as cold-producing medium plays function, first switching mechanism 22 carries out the discharge side of compressor 21 to be connected with the gas side of outdoor heat converter 23 and the switching be connected with the suction side of compressor 21 by the gas side of heat-storage heat exchanger 28 (outdoor heat radiation switching state, the solid line with reference to first switching mechanism 22 of Fig. 1).At this, when making the first switching mechanism 22 switch to outdoor heat radiation switching state, heat-storage heat exchanger 28 can be made to play function as the evaporimeter of cold-producing medium.In addition, when the evaporimeter making outdoor heat converter 23 as cold-producing medium plays function, first switching mechanism 22 carries out the suction side of compressor 21 to be connected with the gas side of outdoor heat converter 23 and the switching be connected with the discharge side of compressor 21 by the gas side of heat-storage heat exchanger 28 (outdoor evaporation switching state, the dotted line with reference to first switching mechanism 22 of Fig. 1).At this, when making the second switching mechanism 22 switch to outdoor evaporation switching state, heat-storage heat exchanger 28 can be made to play function as the radiator of cold-producing medium.In addition, the first switching mechanism 22 may not be four-way switching valve, but is configured to the combination such as triple valve and magnetic valve with the component playing identical function.
Outdoor heat converter 23 is such as made up of the fin tube type heat exchanger of cross-fin formula.The outdoor fan 25 for being transported to by outdoor air in outdoor heat converter 23 is provided with near outdoor heat converter 23.By by outdoor fan 25 pairs of outdoor heat converter 23 conveying chamber outer air, make to carry out heat exchange between cold-producing medium and outdoor air in outdoor heat converter 23.Outdoor fan motor 26 drive chamber external fan 25 is utilized to rotate.Thus, outdoor heat converter 23 plays function as the radiator of cold-producing medium and the evaporimeter of cold-producing medium.
Outdoor expansion valve 24 is that the cold-producing medium of the flowing in outdoor heat converter 23 made in the refrigerant loop 10c of outside reduces pressure thus the valve changed the flow of the cold-producing medium of flowing in outdoor heat converter 23.Outdoor expansion valve 24 is the electric expansion valves be connected with the hydraulic fluid side of outdoor heat converter 23.
Second switching mechanism 27 is four-way switching valves of the flow direction for switching cold-producing medium.When the evaporimeter making indoor heat converter 42a, 42b as cold-producing medium plays function, second switching mechanism 27 carries out the switching (indoor evaporation switching state, the solid line with reference to second switching mechanism 27 of Fig. 1) be connected with gas refrigerant communicating pipe 7 suction side of compressor 21.In addition, when the radiator making indoor heat converter 42a, 42b as cold-producing medium plays function, second switching mechanism 27 carries out the switching (indoor radiating switching state, the dotted line with reference to second switching mechanism 27 of Fig. 1) discharge side of compressor 21 be connected with gas refrigerant communicating pipe 7.At this, one (Fig. 1 leans on the port on the right side of paper) in four ports of the second switching mechanism 27 connects with the port be connected with the suction side of compressor 21 all the time via capillary 271 (Fig. 1 leans on the port on the upside of paper), thus in fact becomes not by the port used.In addition, the second switching mechanism 27 may not be four-way switching valve, but is configured to the combination such as triple valve and magnetic valve with the component playing identical function.
Heat-storage heat exchanger 28 is the heat exchangers making to carry out between cold-producing medium and heat-storing material heat exchange, in the accumulation of heat undertaken to heat-storing material by playing function as the radiator of cold-producing medium, and when carrying out dispelling the heat (accumulation of heat utilization) from heat-storing material by playing function as the evaporimeter of cold-producing medium, use this heat-storage heat exchanger 28.Heat-storage heat exchanger 28 mainly has the heat storage tank 281 containing heat-storing material and the heat transfer tube group 282 being configured to impregnated in heat-storing material.At this, as shown in Figure 2, heat storage tank 281 is casings of roughly rectangular shape, has heat-storing material in inner product.As heat-storing material, use at this material being carried out accumulation of heat by phase transformation.Specifically, use polyethylene glycol, sodium sulphate hydrate and the paraffin etc. with the phase change temperature of 30 DEG C ~ about 40 DEG C, to carry out phase transformation (melting) and accumulation of heat when heat-storage heat exchanger 28 is used as the radiator of cold-producing medium, and carry out phase transformation (solidifying) when heat-storage heat exchanger 28 is used as the evaporimeter of cold-producing medium and utilize accumulation of heat.As shown in Figure 2, the structure that is connected while there is the collector 283 at the gateway place by being arranged on cold-producing medium and current divider 284 and multiple heat-transfer pipe 285 branch of heat transfer tube group 282.At this, multiple heat-transfer pipe 285 has the shape of turning back along the vertical direction respectively, to be connected to form heat pipe group 282 by making the two ends of above-mentioned multiple heat-transfer pipe 285 with collector 283 and current divider 284.And, the gas side of heat-storage heat exchanger 28 (namely, one end of heat transfer tube group 282) be connected with the first switching mechanism 22, the hydraulic fluid side (that is, the other end of heat transfer tube group 282) of heat-storage heat exchanger 28 is connected with the part between liquid refrigerant communicating pipe 6 via the outdoor expansion valve 24 of accumulation of heat expansion valve 29 and refrigerant loop 10 (be outside refrigerant loop 10c at this).At this, Fig. 2 is the summary construction diagram of heat-storage heat exchanger 28.
Accumulation of heat expansion valve 29 is that the cold-producing medium of the flowing in heat-storage heat exchanger 28 made in the refrigerant loop 10c of outside reduces pressure thus the valve changed the flow of the cold-producing medium of flowing in heat-storage heat exchanger 28.Accumulation of heat expansion valve 29 is the electric expansion valves be connected with the hydraulic fluid side of heat-storage heat exchanger 28.
In addition, in outdoor unit 2, various sensors is provided with.The suction pressure sensor 31 that the suction pressure Ps of compressor 21 is detected, the discharge pressure sensor 32 that the discharge pressure Pd of compressor 21 is detected, the inlet temperature sensor 33 that the inlet temperature Ts of compressor 21 is detected and the discharge temperature sensor 34 that the discharge temperature Td of compressor 21 is detected is provided with in outdoor unit 2.The outdoor heat exchange temperature sensor 35 that the temperature Tol1 of the cold-producing medium of gas-liquid two-phase state is detected is provided with at outdoor heat converter 23.The hydraulic fluid side temperature sensor 36 that the temperature Tol2 of the cold-producing medium of liquid condition or gas-liquid two-phase state is detected is provided with in the hydraulic fluid side of outdoor heat converter 23.The suction inlet side of the outdoor air of outdoor unit 2 is provided with outdoor temperature sensor 37, this outdoor temperature sensor 37 is to supplying outdoor unit 2 (namely, outdoor heat converter 23 and heat-storage heat exchanger 28) temperature (that is, outdoor temperature Ta) of the outdoor air of space outerpace that configures detects.In addition, outdoor unit 2 has the outside control part 38 controlled the action of each several part forming outdoor unit 2.And, outside control part 38 has the DC-to-AC converter etc. controlled the microcomputer, memory and the air compressor motor 25 that arrange to control outdoor unit 2, the exchange carrying out control signal etc. between indoor control part 48a, 48b of energy and indoor unit 4a, 4b.
< cold-producing medium communicating pipe >
Cold-producing medium communicating pipe 6,7 is when arranging aircondition 1 at the scene by the refrigerant pipe of constructing, and the setting model according to outdoor unit 2 and indoor unit 4a, 4b uses the cold-producing medium communicating pipe with various length and caliber.
< control part >
As shown in Figure 1, for operating separately remote controllers 49a, the 49b of indoor unit 4a, 4b, the outside control part 38 of indoor control part 48a, 48b of indoor unit 4a, 4b and outdoor unit 2 forms and carries out to aircondition 1 entirety the control part 8 controlled that operates.As shown in Figure 3, control part 8 so that various sensor 31 ~ 37 can be received, the mode of detection signal of 45a, 45b, 46a, 46b, 47a, 47b etc. is connected with various sensor 31 ~ 37,45a, 45b, 46a, 46b, 47a, 47b.Further, control part 8 be configured to by detection signal based on above-mentioned various sensor etc. to various equipment and valve 20,22,24,26,41a, 41b, 44a, 44b control, and can carry out operation of air conditioner (cooling operation and heat running).At this, Fig. 3 is the control block diagram of aircondition 1.
As mentioned above, aircondition 1 has the refrigerant loop 10 by making multiple stage (in this case two) indoor unit 4a, 4b be connected with outdoor unit 2 and form.Further, in aircondition 1, utilize control part 8 to carry out following running like this and control.
(2) elemental motion of aircondition
Next, use Fig. 4 to Fig. 7 to the cooling operation of aircondition 1, heat the elemental motion that running, accumulation of heat running and defrosting operate and be described.At this, Fig. 4 is the figure of the flowing of the cold-producing medium represented in the refrigerant loop in cooling operation.Fig. 5 is the figure of the flowing of the cold-producing medium represented in the refrigerant loop that heats in running.Fig. 6 is the figure of the flowing of the cold-producing medium represented in the refrigerant loop in accumulation of heat running (heating accumulation of heat running during running).Fig. 7 is the figure of the flowing of the cold-producing medium represented in the refrigerant loop in defrosting running (utilizing the defrosting running of running with accumulation of heat).
< cooling operation >
When sending the instruction of cooling operation from remote controllers 49a, 49b, the first switching mechanism 22 is made to switch to outdoor heat radiation switching state (state indicated by the solid line of first switching mechanism 22 of Fig. 4), and make the second switching mechanism 27 switch to indoor evaporation switching state (state indicated by the solid line of second switching mechanism 27 of Fig. 4), and make accumulation of heat expansion valve 29 be in closed state (namely, do not use the state of heat-storage heat exchanger 28), compressor 21, outdoor fan 25 and indoor fan 43a, 43b are started.
Like this, the gas refrigerant of the low pressure in refrigerant loop 10 is inhaled into the gas refrigerant becoming high pressure in compressor 21 and by compressing.The gas refrigerant of this high pressure is transported in outdoor heat converter 23 via the first switching mechanism 22.The gas refrigerant being transported to the high pressure in outdoor heat converter 23 plays in the outdoor heat converter 23 of function at the radiator as cold-producing medium, carry out heat exchange with the outdoor air supplied by outdoor fan 25 and be cooled, thus condensation, become the liquid refrigerant of high pressure.The liquid refrigerant of this high pressure via outdoor expansion valve 24 and liquid refrigerant communicating pipe 6 outdoor unit 2 be transported in indoor unit 4a, 4b.
The liquid refrigerant being transported to the high pressure in indoor unit 4a, 4b is reduced pressure by indoor expansion valve 41a, 41b and becomes the cold-producing medium of the gas-liquid two-phase state of low pressure.The cold-producing medium of the gas-liquid two-phase state of this low pressure is transported in indoor heat converter 42a, 42b.The cold-producing medium being transported to the gas-liquid two-phase state of the low pressure in indoor heat converter 42a, 42b plays in indoor heat converter 42a, 42b of function at the evaporimeter as cold-producing medium, carry out heat exchange with the room air supplied by indoor fan 43a, 43b and heated, thus evaporation, become the gas refrigerant of low pressure.The gas refrigerant of this low pressure via gas refrigerant communicating pipe 7 indoor unit 4a, 4b be transported in outdoor unit 2.
The gas refrigerant being transported to the low pressure in outdoor unit 2 is sucked by compressor 21 again via the second switching mechanism 27.
< heats running >
When sending from remote controllers 49a, 49b the instruction heating running, the first switching mechanism 22 is made to switch to outdoor evaporation switching state (state represented by dashed line of first switching mechanism 22 of Fig. 5), and make the second switching mechanism 27 switch to indoor radiating switching state (state represented by dashed line of second switching mechanism 27 of Fig. 5), and make accumulation of heat expansion valve 29 be in closed state (namely, do not use the state of heat-storage heat exchanger 28), compressor 21, outdoor fan 25 and indoor fan 43a, 43b are started.
Like this, the gas refrigerant of the low pressure in refrigerant loop 10 to be inhaled in compressor 21 and to be become the gas refrigerant of high pressure by compressing.The gas refrigerant of this high pressure via the second switching mechanism 27 and gas refrigerant communicating pipe 7 outdoor unit 2 be transported in indoor unit 4a, 4b.
The gas refrigerant being transported to the high pressure in indoor unit 4a, 4b is transported in indoor heat converter 42a, 42b.The gas refrigerant being transported to the high pressure in indoor heat converter 42a, 42b plays in indoor heat converter 42a, 42b of function at the radiator as cold-producing medium, carry out heat exchange with the room air supplied by indoor fan 43a, 43b and be cooled, thus condensation, become the liquid refrigerant of high pressure.The liquid refrigerant of this high pressure is reduced pressure by indoor expansion valve 41a, 41b.The cold-producing medium reduced pressure by indoor expansion valve 41a, 41b via gas refrigerant communicating pipe 7 indoor unit 4a, 4b be transported in outdoor unit 2.
The cold-producing medium be transported in outdoor unit 2 is transported in outdoor expansion valve 24, is reduced pressure and become the cold-producing medium of the gas-liquid two-phase state of low pressure by outdoor expansion valve 24.The cold-producing medium of the gas-liquid two-phase state of this low pressure is transported in outdoor heat converter 23.The cold-producing medium being transported to the gas-liquid two-phase state of the low pressure in outdoor heat converter 23 plays in the outdoor heat converter 23 of function at the evaporimeter as cold-producing medium, carry out heat exchange with the outdoor air supplied by outdoor fan 25 and heated, thus evaporation, become the gas refrigerant of low pressure.The gas refrigerant of this low pressure is sucked by compressor 21 again via the first switching mechanism 22.
< accumulation of heat running (heating accumulation of heat running during running) >
When heating running, carry out accumulation of heat running, this accumulation of heat running refers to by making heat-storage heat exchanger 28 play function as the radiator of cold-producing medium and carries out the running of accumulation of heat to heat-storing material.Namely, carrying out making outdoor heat converter 23 play function as the evaporimeter of cold-producing medium, and make indoor heat converter 42a, 42b as cold-producing medium radiator play function heat running time, carry out accumulation of heat running (accumulation of heat running when heating running), this accumulation of heat running refers to by making heat-storage heat exchanger 28 play function as the radiator of cold-producing medium and carries out the running of accumulation of heat to heat-storing material.By opening accumulation of heat expansion valve 29 with on the basis heating the identical switching state that operates making switching mechanism 22,27 switch to, carry out the accumulation of heat running (with reference to Fig. 6) when this heats running.
Like this, the gas refrigerant of the low pressure in refrigerant loop 10 to be inhaled in compressor 21 and to be become the gas refrigerant of high pressure by compressing.Identical with when heating running, the part of the gas refrigerant of this high pressure via the second switching mechanism 27 and gas refrigerant communicating pipe 7 outdoor unit 2 be transported in indoor unit 4a, 4b.This gas refrigerant being transported to the high pressure in indoor unit 4a, 4b plays in indoor heat converter 42a, 42b of function at the radiator as cold-producing medium, carry out heat exchange with the room air supplied by indoor fan 43a, 43b and be cooled, thus condensation, become the liquid refrigerant of high pressure.The liquid refrigerant of this high pressure is reduced pressure by indoor expansion valve 41a, 41b.The cold-producing medium reduced pressure by indoor expansion valve 41a, 41b via gas refrigerant communicating pipe 7 indoor unit 4a, 4b be transported in outdoor unit 2.
In addition, be transported in heat-storage heat exchanger 28 from the remainder of the gas refrigerant of the high pressure of compressor 21 discharge via the first switching mechanism 22.The gas refrigerant being transported to the high pressure in heat-storage heat exchanger 28 plays in the heat-storage heat exchanger 28 of function at the radiator as cold-producing medium, carries out heat exchange and be cooled with heat-storing material, thus condensation, become the liquid refrigerant of high pressure.The liquid refrigerant of this high pressure is reduced pressure by accumulation of heat expansion valve 29.At this, the heat-storing material of heat-storage heat exchanger 28 is heated by the heat exchange with cold-producing medium, thus undergoes phase transition (melting), carries out accumulation of heat.
The cold-producing medium reduced pressure by accumulation of heat expansion valve 29 and indoor unit 4a, 4b cold-producing medium be transported in outdoor unit 2 collaborate and are transported in outdoor expansion valve 24, and are reduced pressure by outdoor expansion valve 24 and become the cold-producing medium of the gas-liquid two-phase state of low pressure.The cold-producing medium of the gas-liquid two-phase state of this low pressure is transported in outdoor heat converter 23.The cold-producing medium being transported to the gas-liquid two-phase state of the low pressure in outdoor heat converter 23 plays in the outdoor heat converter 23 of function at the evaporimeter as cold-producing medium, carry out heat exchange with the outdoor air supplied by outdoor fan 25 and heated, thus evaporation, become the gas refrigerant of low pressure.The gas refrigerant of this low pressure is sucked by compressor 21 again via the first switching mechanism 22.Like this, in the accumulation of heat running when heating running, heat-storage heat exchanger 28 plays function as the radiator of the cold-producing medium in parallel with indoor heat converter 42a, 42b.That is, refrigerant loop 10 is configured to, in the accumulation of heat running when heating running, the gas refrigerant of the high pressure of discharging from compressor 21 to be transported in indoor heat converter 42a, 42b and heat-storage heat exchanger 28 in parallel.
< defrosting running (utilizing the defrosting running of running with accumulation of heat) >
When heating running, carry out by make outdoor heat converter 23 as cold-producing medium radiator play function and carry out the defrosting of outdoor heat converter defrosting running.Further, when defrosting operates, carry out accumulation of heat and utilize running, this accumulation of heat utilizes to operate and refers to by making heat-storage heat exchanger 28 carry out the running of dispelling the heat as the evaporimeter performance function of cold-producing medium from heat-storing material.Namely, carry out making outdoor heat converter 23 play function as the radiator of cold-producing medium, and heat-storage heat exchanger 28 is utilized operate (accumulation of heat utilization running during defrosting running and the defrosting running with accumulation of heat utilization running) as the accumulation of heat of the evaporimeter performance function of cold-producing medium.And, at this, by making indoor heat converter 42a, 42b play function as the radiator of cold-producing medium, also carry out heating running simultaneously.That is, at this, when defrosting running, carrying out accumulation of heat simultaneously and utilizing running and heat running (or simultaneously carrying out heating running in the defrosting running with accumulation of heat utilization running).First switching mechanism 22 is being switched to outdoor heat radiation switching state, and the second switching mechanism 27 is switched on the basis of indoor radiating switching state, open accumulation of heat expansion valve 29, thus accumulation of heat when carrying out this defrosting running utilizes running (or utilizing the defrosting running of running with accumulation of heat) (with reference to Fig. 7).In addition, when defrosting running, outdoor fan 25 is stopped.
Like this, the gas refrigerant of the low pressure in refrigerant loop 10 is inhaled into the interior also compression of compressor 21 and becomes the gas refrigerant of high pressure.Identical with when heating running, the part of the gas refrigerant of this high pressure via the second switching mechanism 27 and gas refrigerant communicating pipe 7 outdoor unit 2 be transported in indoor unit 4a, 4b.This gas refrigerant being transported to the high pressure in indoor unit 4a, 4b plays in indoor heat converter 42a, 42b of function at the radiator as cold-producing medium, carry out heat exchange with the room air supplied by indoor fan 43a, 43b and be cooled, thus condensation, become the liquid refrigerant of high pressure.The liquid refrigerant of this high pressure is reduced pressure by indoor expansion valve 41a, 41b.The cold-producing medium reduced pressure by indoor expansion valve 41a, 41b via gas refrigerant communicating pipe 7 indoor unit 4a, 4b be transported in outdoor unit 2.
In addition, be transported in outdoor heat converter 23 from the remainder of the gas refrigerant of the high pressure of compressor 21 discharge via the first switching mechanism 22.The gas refrigerant being transported to the high pressure in outdoor heat converter 23 plays in the outdoor heat converter 23 of function at the radiator as cold-producing medium, carries out heat exchange with the frost and ice being attached to outdoor heat converter 23 and is cooled.The cold-producing medium of this high pressure is reduced pressure by outdoor expansion valve 24.At this, the frost and the ice that are attached to outdoor heat converter 23 are heated by the heat exchange with cold-producing medium, thus melt, and defrost to outdoor heat converter 23.
The cold-producing medium of the high pressure reduced pressure by outdoor expansion valve 24 and unit 4a, 4b cold-producing medium be transported in outdoor unit 2 indoor collaborate and are transported in accumulation of heat expansion valve 29, reduced pressure and become the cold-producing medium of the gas-liquid two-phase state of low pressure by accumulation of heat expansion valve 29.The cold-producing medium of the gas-liquid two-phase state of this low pressure is transported in heat-storage heat exchanger 28.The cold-producing medium being transported to the gas-liquid two-phase state of the low pressure in heat-storage heat exchanger 28 plays in the heat-storage heat exchanger 28 of function at the evaporimeter as cold-producing medium, carries out heat exchange and heated with heat-storing material, thus evaporation, become the gas refrigerant of low pressure.The gas refrigerant of this low pressure is sucked by compressor 21 again via the first switching mechanism 22.At this, the heat-storing material of heat-storage heat exchanger 28 is cooled by the heat exchange with cold-producing medium, thus undergoes phase transition (solidifying) and utilize accumulation of heat.Like this, when carrying out heating running in operate in the defrosting with accumulation of heat utilization running (or accumulation of heat utilization running during defrosting running), indoor heat converter 42a, 42b play function as the radiator of the cold-producing medium in parallel with outdoor heat converter 23 simultaneously.Namely, refrigerant loop 10 is configured to: when carrying out heating running in operate in the defrosting with accumulation of heat utilization running (or accumulation of heat utilization running during defrosting running), the gas refrigerant of the high pressure of discharging from compressor 21 can be transported in outdoor heat converter 23 and indoor heat converter 42a, 42b by refrigerant loop 10 in parallel simultaneously.
< cooling operation, heat running and accumulation of heat running control >
-during cooling operation-
In above-mentioned cooling operation, degree of superheat SHra, SHrb in order to the cold-producing medium making the exit of each indoor heat converter 42a, 42b reach target superheat degree SHras, SHrbs, and control part 8 is determined the aperture of each indoor expansion valve 41a, 41b and carried out controlling (this control being called " degree of superheat of being undertaken by indoor expansion valve controls " below).At this, according to the suction pressure Ps detected by suction pressure sensor 31 and temperature Trga, the Trgb of the cold-producing medium of the gas side of indoor heat converter 42a that are detected by gas side temperature sensor 46a, 46b, calculate degree of superheat SHra, SHrb.More specifically, first, suction pressure Ps is converted into the saturation temperature of cold-producing medium, obtain with refrigerant loop 10 in evaporating pressure Pe equivalence quantity of state, i.e. evaporating temperature Te (namely, although evaporating pressure Pe and evaporating temperature Te term itself are different, actually refer to identical quantity of state).At this, the pressure that evaporating pressure Pe refers to when cooling operation, the outlet represented at expansion valve 41a, 41b indoor arrives the cold-producing medium of the low pressure of the ranged flow till the suction side of compressor 21 via indoor heat converter 42a, 42b.Further, by deducting evaporating temperature Te in temperature Trga, the Trgb of the cold-producing medium of the gas side from each indoor heat converter 42a, 42b, degree of superheat SHra, SHrb is obtained.
In addition, in cooling operation, indoor control part 48a, 48b each equipment to indoor unit 4a, 4b of comprising indoor expansion valve 41a, 41b of control part 8 is utilized to control.In addition, each equipment of the outside control part 38 of control part 8 to the outdoor unit 2 comprising outdoor expansion valve 24 is utilized to control.
-when heating running-
Heat in running above-mentioned, in order to degree of subcooling SCra, the SCrb of the cold-producing medium making the exit of each indoor heat converter 42a, 42b reach target degree of subcooling SCras, SCrbs, control part 8 is determined the aperture of each indoor expansion valve 41a, 41b and is carried out controlling (this control being called " degree of subcooling of being undertaken by indoor expansion valve controls " below).At this, according to the discharge pressure Pd detected by discharge pressure sensor 32 and temperature Trla, the Trlb of the cold-producing medium of the hydraulic fluid side of indoor heat converter 42a that are detected by hydraulic fluid side temperature sensor 45a, 45b, calculate degree of subcooling SCra, SCrb.More specifically, first, discharge pressure Pd is converted into the saturation temperature of cold-producing medium, obtain with refrigerant loop 10 in condensing pressure Pc equivalence quantity of state, i.e. condensation temperature Tc (namely, although condensing pressure Pc and condensation temperature Tc term itself are different, actually refer to identical quantity of state).At this, condensing pressure Pc referring to when heating running, representing the pressure of the cold-producing medium of the high pressure arriving the ranged flow till indoor expansion valve 41a, 41b in the discharge side from compressor 21 via indoor heat converter 42a, 42b.Further, by deducting temperature Trla, the Trlb of the cold-producing medium of the hydraulic fluid side of each indoor heat converter 42a, 42b from condensation temperature Tc, degree of subcooling SCra, SCrb is obtained.
In addition, heating in running, utilizing indoor control part 48a, 48b each equipment to indoor unit 4a, 4b of comprising indoor expansion valve 41a, 41b of control part 8 to control.In addition, each equipment of the outside control part 38 of control part 8 to the outdoor unit 2 comprising outdoor expansion valve 24 is utilized to control.
-during accumulation of heat running-
In above-mentioned accumulation of heat running, when the accumulation of heat of the heat-storing material to heat-storage heat exchanger 28 finishes, control part 8 makes accumulation of heat running terminate and be transferred to heat running.Further, when have passed through Δ tbet interval time of regulation after when operating from accumulation of heat, defrosting running is transferred to.That is, interval time, Δ tbet referred to defrost the interval time between operating.Further, carry out in substantially during interval time Δ tbet accumulation of heat running when heating running and accumulation of heat running terminate after heat running, at every turn through interval time Δ tbet all carry out defrosting and operate.
As mentioned above, in aircondition 1, cooling operation can be carried out with switching and heat running.Further, by carrying out accumulation of heat running when heating running, can proceed to heat running, while carry out the accumulation of heat to heat-storing material, utilizing running by carrying out accumulation of heat when defrosting running, the accumulation of heat of heat-storing material can be utilized to carry out defrosting running.
(3) control during defrosting running
When carrying out the defrosting running utilizing running with above-mentioned accumulation of heat, the defrosting ability of required outdoor heat converter 23 is different because arranging the meteorological condition (degree of outdoor temperature, humidity and snowfall) in the area of aircondition 1 etc.For the difference of this defrosting ability caused by the meteorological condition etc. in area, consider hypothesis as cold district in the meteorological condition etc. carrying out requiring when utilizing the defrosting running of running with accumulation of heat the strongest defrosting ability, determine to comprise the specification of the heat-storage heat exchanger of the capacity of heat-storing material etc.But, in the specification defining method of this heat-storage heat exchanger 28, need jumbo heat-storing material, the impact of the size of heat-storage heat exchanger 28, weight and cost increased.In addition, when aircondition 1 is arranged on cold district, there is the specification of the aircondition 1 of heat-storage heat exchanger 28 just for being arranged at cold district, but when aircondition 1 is arranged on warm area, the specification with the aircondition 1 of heat-storage heat exchanger 28 is superfluous.Certainly, if prepare the abundant aircondition 1 with multiple specifications of heat-storage heat exchanger 28 by area, then can tackle the setting in extensive area, but specification is abundant, it is unfavorable correspondingly to strengthen the decline of productivity ratio or the rising of cost etc.
In addition, when carrying out heating running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, a part for the defrosting ability of outdoor heat converter 23 is used as the heating capacity of indoor heat converter 42a, 42b.Now, even if need the defrosting ability increasing outdoor heat converter 23, if maintain the heating capacity of indoor heat converter 42a, 42b, then the defrosting ability of outdoor heat converter 23 still may be not enough.
So, at this, utilizing in the defrosting running of running with accumulation of heat, temperature, the i.e. outdoor heat exchange outlet temperature Tol2 of the cold-producing medium of the outlet of the outdoor heat converter 23 at the end of operating based on the outdoor temperature Ta and/or previous defrosting that supply the space outerpace of outdoor heat converter 23 configuration, change the defrosting ability of outdoor heat converter 23.Particularly, utilizing in the defrosting running of running with accumulation of heat, when requiring the change carrying out the defrosting ability increasing outdoor heat converter 23, carrying out heating running, and reducing the heating capacity of indoor heat converter 42a, 42b.
Specifically, at this, according to the defrosting operation mode of the table of the defrosting operation mode of the defrosting ability for changing outdoor heat converter 23 shown in Fig. 8 and the defrosting ability for changing outdoor heat converter 23 of Fig. 9 flow chart shown in step ST1 ~ ST3, carry out the change of the defrosting ability of outdoor heat converter 23.
When starting the defrosting running carrying out utilizing running with accumulation of heat, first, determine whether to meet pattern 1 jump condition.In addition, when previous defrosting running is the defrosting running of pattern 2 (aftermentioned), determine whether to meet pattern 1 recover condition.Then, when meeting pattern 1 jump condition, or when meeting pattern 1 recover condition, carry out the defrosting running of the pattern 1 of step ST1.At this, the outdoor temperature Ta of situation when pattern 1 jump condition is for starting based on representative defrosting running determines whether to carry out the condition of the defrosting running of pattern 1.And, at this, when outdoor temperature Ta is higher than the threshold temperature (value obtained after such as making the first outdoor temperature Tadef1 be added with the temperature Δ Tadef of regulation) of the first outdoor temperature Tadef1 acquisition based on regulation, even if while guarantee the heating capacity of indoor heat converter 42a, 42b, while carry out defrosting running, also the defrosting of impossible generation chamber outer heat-exchanger 23 is not enough, meets pattern 1 jump condition.In addition, the outdoor temperature Ta of situation when pattern 1 recover condition is for starting based on representative defrosting running and the outdoor heat exchange outlet temperature Tol2 of situation represented at the end of previous defrosting running determines whether to revert to from the defrosting running of pattern 2 condition of the defrosting running of pattern 1.And, at this, the first defrosting running that outdoor heat exchange outlet temperature Tol2 at the end of the defrosting running of first three time is regulation judges that temperature Tdef1 is (at this, identical with the defrosting that the terminates end temp Tdefe that operates that operates of referring to defrosting) more than, and outdoor temperature Ta is higher than the second outdoor temperature Tadef2 (be temperature lower than first outdoor temperature Tadef1 when this) of regulation, even if while guarantee indoor heat converter 42a, the heating capacity of 42b, while carry out defrosting running, also the defrosting of impossible generation chamber outer heat-exchanger 23 is not enough, meet pattern 1 recover condition.In addition, as shown in Figure 8, the heating capacity of indoor heat converter 42a, 42b is guaranteed in the defrosting running of pattern 1, and carry out the defrosting of outdoor heat converter 23, at this, by indoor expansion valve 41a, 41b being opened the gas refrigerant of the aperture of regulation and indoor heat converter 42a, 42b supply high pressure to the radiator performance function as cold-producing medium, and indoor fan 43a, 43b being operated with minimum speed, carrying out the defrosting running of pattern 1.In addition, in the defrosting running of above-mentioned pattern 1, outside control part 38 not only determine to form outdoor unit 2 equipment (compressor 21, switching mechanism 22,27, outdoor expansion valve 24, outdoor fan 25 and accumulation of heat expansion valve 29) control content, also determine the control content of the equipment (indoor expansion valve 41a, 41b, indoor fan 43a, 43b) forming indoor unit 4a, 4b.
But, when previous defrosting running be pattern 1 defrosting running, when guarantee indoor heat converter 42a, 42b heating capacity and carry out defrosting running time, sometimes generation chamber outer heat-exchanger 23 defrosting deficiency.So, when previous defrosting running is the defrosting running of pattern 1, determine whether to meet pattern 2 jump condition.Further, when meeting pattern 2 jump condition, the defrosting running of the pattern 2 of step ST2 is carried out.At this, the outdoor temperature Ta of situation when pattern 2 jump condition is for starting based on representative defrosting running and the outdoor heat exchange outlet temperature Tol2 of situation represented at the end of previous defrosting running determines whether the condition that the defrosting that should translate into pattern 2 from the defrosting of pattern 1 operates.And, at this, than the first defrosting running of regulation, outdoor heat exchange outlet temperature Tol2 at the end of previous defrosting running judges that temperature Tdef1 (identical at the defrosting defrosting that the terminates end temp Tdefe that operates that operates of this and finger) is low, and when outdoor temperature Ta is below the first outdoor temperature Tadef1 of regulation, or when outdoor temperature Ta is below the second outdoor temperature Tadef2 of regulation, when guaranteeing indoor heat converter 42a, the heating capacity of 42b when carrying out defrosting running, the defrosting of possible generation chamber outer heat-exchanger 23 is not enough, meet pattern 2 jump condition.In addition, as shown in Figure 8, the defrosting running of pattern 2 reduces the heating capacity of indoor heat converter 42a, 42b, and carry out the defrosting of outdoor heat converter 23, play the gas refrigerant of indoor heat converter 42a, 42b supply high pressure of function to the radiator as cold-producing medium by making indoor expansion valve 41a, 41b crack (aperture of less than 15% such as during standard-sized sheet) at this, and indoor fan 43a, 43b are operated with minimum speed, carry out the defrosting running of pattern 2.In addition, equally, in the defrosting running of above-mentioned pattern 2, outside control part 38 not only determine to form outdoor unit 2 equipment (compressor 21, switching mechanism 22,27, outdoor expansion valve 24, outdoor fan 25 and accumulation of heat expansion valve 29) control content, also determine the control content of the equipment (indoor expansion valve 41a, 41b, indoor fan 43a, 43b) forming indoor unit 4a, 4b.
But when previous defrosting running is the defrosting running of pattern 2, only by making the crack heating capacity reducing indoor heat converter 42a, 42b of indoor expansion valve 41a, 41b, the defrosting that sometimes can not solve outdoor heat converter 23 is not enough.So, when previous defrosting running is the defrosting running of pattern 2, determine whether to meet mode 3 jump condition.Further, when meeting mode 3 jump condition, the defrosting running of the mode 3 of step ST3 is carried out.At this, mode 3 jump condition is the condition for determining whether to translate into from the defrosting of pattern 2 the defrosting running of mode 3 based on the outdoor heat exchange outlet temperature Tol2 of the situation represented at the end of previous defrosting running.And, at this, than the second defrosting running of regulation, when outdoor heat exchange outlet temperature Tol2 at the end of previous defrosting running judges that temperature Tdef2 (identical at this and the finger defrosting of the end the operated end temp Tdefe that operates that defrosts) is low, when carrying out defrosting running when the heating capacity only reducing indoor heat converter 42a, 42b, the defrosting of possible generation chamber outer heat-exchanger 23 is not enough, meets mode 3 jump condition.In addition, as shown in Figure 8, the defrosting running of mode 3 stops supplying heating capacity in indoor heat converter 42a, 42b, and carry out the defrosting of outdoor heat converter 23, at this, by making indoor expansion valve 41a, 41b full cut-off and making indoor fan 43a, 43b stop, carrying out the defrosting running of mode 3.
In addition, when previous defrosting running is the defrosting running of mode 3, sometimes by stopping supplying heating capacity and the defrosting carrying out outdoor heat converter 23 defrosting that solves outdoor heat converter 23 is not enough to indoor heat converter 42a, 42b.So, when previous defrosting running is the defrosting running of mode 3, determine whether to meet pattern 2 recover condition.Further, when meeting pattern 2 recover condition, the defrosting running of the pattern 2 of step ST2 is carried out.At this, pattern 2 recover condition is the condition for determining whether to revert to from the defrosting running of mode 3 the defrosting running of pattern 2 based on the outdoor heat exchange outlet temperature Tol2 of the situation represented at the end of previous defrosting running.And, at this, the second defrosting running that outdoor heat exchange outlet temperature Tol2 at the end of defrosting running of first three time is regulation judges more than temperature Tdef2 (identical at this and the finger defrosting of the end the operated end temp Tdefe that operates that defrosts), even if while supply heating capacity while carry out the defrosting of outdoor heat converter 23 to indoor heat converter 42a, 42b, also the defrosting of impossible generation chamber outer heat-exchanger 23 is not enough, meets pattern 2 recover condition.In addition, equally, in the defrosting running of above-mentioned mode 3, outside control part 38 not only determine to form outdoor unit 2 equipment (compressor 21, switching mechanism 22,27, outdoor expansion valve 24, outdoor fan 25 and accumulation of heat expansion valve 29) control content, also determine the control content of the equipment (indoor expansion valve 41a, 41b, indoor fan 43a, 43b) forming indoor unit 4a, 4b.
Like this, at this, utilizing in the defrosting running of running with accumulation of heat, the meteorological condition etc. making needs foundation arrange the area of aircondition 1 carries out the defrosting ability of the outdoor heat converter 23 changed, and changes based on the outdoor heat exchange outlet temperature Tol2 at the end of outdoor temperature Ta and/or previous defrosting running.Therefore, utilizing in the defrosting running of running with accumulation of heat, the defrosting ability of outdoor heat converter 23 can be made just to tackle the meteorological condition etc. in the area that aircondition 1 is set.Thereby, it is possible to utilize the heat-storage heat exchanger 28 with the heat-storing material of specified vol to tackle area widely.In addition, at this, utilizing in the defrosting running of running with accumulation of heat, can make to heat running as far as possible and proceeding, and the defrosting ability of outdoor heat converter 23 can be guaranteed.
In addition, in the defrosting running (the defrosting running of pattern 1 ~ mode 3) utilizing running with above-mentioned accumulation of heat, outside control part 38 not only determine to form outdoor unit 2 equipment (compressor 21, switching mechanism 22,27, outdoor expansion valve 24, outdoor fan 25 and accumulation of heat expansion valve 29) control content, also determine the control content of the equipment (indoor expansion valve 41a, 41b, indoor fan 43a, 43b) forming indoor unit 4a, 4b, this point from only carry out cooling operation or heat the situation of running different.Therefore, outside control part 38 can carry out blanket control to utilizing with accumulation of heat the equipment of aircondition 1 entirety in the defrosting of running running, controls each equipment by the square.
(4) variation 1
In the defrosting running with accumulation of heat utilization running of above-mentioned embodiment, when outdoor heat exchange outlet temperature Tol when outdoor temperature Ta is lower and at the end of previous defrosting running is lower, it is desirable that carry out defrosting running continually and carry out defrosting running well.
So, at this as shown in Figure 10, based on the outdoor heat exchange outlet temperature Tol2 at the end of outdoor temperature Ta and/or previous defrosting running, Δ tbet interval time between defrosting running is changed.In the situation (carrying out the situation of the defrosting running of pattern 2 at this) that outdoor heat exchange outlet temperature Tol2 such as when outdoor temperature Ta is lower and at the end of previous defrosting running is lower, carry out making the change that interval time, Δ tbet shortened between defrosting running.
Thus, the frequency of defrosting running can be changed as required at this, carry out the defrosting running utilizing running with accumulation of heat well.
(5) variation 2
When carrying out heating running in the defrosting running with accumulation of heat utilization running at above-mentioned embodiment and variation 1 simultaneously, only by reducing the heating capacity (also comprise and stop supply heating capacity) of indoor heat converter 42a, 42b, the outdoor heat exchange outlet temperature Tol2 at the end of outdoor temperature Ta reduction or previous defrosting running is caused to reduce, so that the defrosting ability of outdoor heat converter 23 can not be realized sometimes.That is, only utilize the defrosting of the pattern 1 ~ mode 3 of above-mentioned embodiment to operate, sometimes can not realize the defrosting ability of outdoor heat converter 23.
So, at this, utilizing in the defrosting running of running with accumulation of heat, requiring that the situation of change of the defrosting ability increasing outdoor heat converter 23 is further (at this, the situation that can not realize the defrosting ability of outdoor heat converter 23 in the defrosting running of mode 3) under, asynchronously carry out heating running, but carry out communicating pipe recuperation of heat running and/or Indoor Thermal exchanged heat recovery running.
Specifically, at this, according to the defrosting operation mode of the table of the defrosting operation mode of the defrosting ability for changing outdoor heat converter 23 shown in Figure 11 and the defrosting ability for changing outdoor heat converter 23 of Figure 12 flow chart shown in step ST1 ~ step ST6, carry out the change of the defrosting ability of outdoor heat converter 23.
When starting the defrosting running carrying out utilizing running with accumulation of heat, same with the pattern 1 ~ mode 3 (step ST1 ~ step ST3) of above-mentioned embodiment, reduce the heating capacity (also comprise and stop supply heating capacity) of indoor heat converter 42a, 42b, and carry out defrosting running.
But when previous defrosting running is the defrosting running of mode 3, only by making indoor expansion valve 41a, 41b full cut-off stop supplying heating capacity to indoor heat converter 42a, 42b, the defrosting that sometimes can not solve outdoor heat converter 23 is not enough.So, when previous defrosting running is the defrosting running of mode 3, determine whether to meet pattern 4 jump condition.Further, when meeting pattern 4 jump condition, the defrosting running of the pattern 4 of step ST4 is carried out.At this, pattern 4 jump condition is the condition for determining whether to translate into from the defrosting of mode 3 the defrosting running of pattern 4 based on the outdoor heat exchange outlet temperature Tol2 of the situation represented at the end of previous defrosting running.And, at this, than the 3rd defrosting running of regulation, outdoor heat exchange outlet temperature Tol2 at the end of previous defrosting running judges that temperature Tdef3 is (at this, identical with the defrosting of the end operated of referring to the to defrost end temp Tdefe that operates) low and defrosting that is that implement to carry out pattern 4 operate setting when, only by stopping supplying heating capacity to indoor heat converter 42a, 42b, the defrosting of possible generation chamber outer heat-exchanger 23 is not enough, meets pattern 4 jump condition.At this, as shown in figure 13, the recuperation of heat running setting member 81 being located at control part 8 is utilized whether to carry out the setting (also comprising the setting of the defrosting running whether carrying out pattern 5,6) of the defrosting running of pattern 4.At this, recuperation of heat running setting member 81 is the memories of the outside control part 38 being arranged at control part 8, by from the various communications controlling the external equipment of setting etc. for carrying out aircondition 1, the defrosting running whether carrying out pattern 4 ~ pattern 6 can be set.In addition, recuperation of heat running setting member 81 is not limited to said structure, as long as such as can to set the structure that the defrosting of whether carrying out pattern 4 ~ pattern 6 operates the dual-in-line switch of outside control part 38 etc. as being arranged at.In addition, as seen in figures 11 and 14, the defrosting of pattern 4 operates at and operates by making indoor expansion valve 41a, 41b full cut-off stopped the communicating pipe recuperation of heat carried out the heat that refrigerant pipe (mainly gas refrigerant communicating pipe 7) is possessed reclaims under the state of indoor heat converter 42a, 42b supply heating capacity, this refrigerant pipe is connected between indoor heat converter 42a, 42b with compressor 21, and carries out the defrosting of outdoor heat converter 23.At this, for in order to make indoor heat converter 42a, 42b plays function as the radiator of cold-producing medium and switches to the second switching mechanism 27 of indoor radiating switching state, this second switching mechanism 27 is made to switch to for making indoor heat converter 42a, 42b is as the indoor evaporation switching state of the evaporimeter performance function of cold-producing medium, thus make junction chamber inside heat exchanger 42a, refrigerant pipe (mainly gas refrigerant communicating pipe 7) between 42b and compressor 21 is in low pressure, the gas refrigerant of the high temperature be trapped in this refrigerant pipe is drawn in compressor 21 together with the cold-producing medium of the low pressure from heat-storage heat exchanger 28, thus carry out the defrosting running (with reference to Figure 14) of pattern 4.In addition, equally, in the defrosting running of above-mentioned pattern 4, outside control part 38 not only determine to form outdoor unit 2 equipment (compressor 21, switching mechanism 22,27, outdoor expansion valve 24, outdoor fan 25 and accumulation of heat expansion valve 29) control content, also determine the control content of the equipment (indoor expansion valve 41a, 41b, indoor fan 43a, 43b) forming indoor unit 4a, 4b.
In addition, when previous defrosting running is the defrosting running of pattern 4, sometimes by carrying out communicating pipe recuperation of heat running and carrying out the defrosting of outdoor heat converter 23, the defrosting solving outdoor heat converter 23 is not enough.So, when previous defrosting running is the defrosting running of pattern 4, determine whether to meet mode 3 recover condition.Further, when meeting mode 3 recover condition, the defrosting running of the mode 3 of step ST3 is carried out.At this, mode 3 recover condition is the condition for determining whether to revert to from the defrosting running of pattern 4 the defrosting running of mode 3 based on the outdoor heat exchange outlet temperature Tol2 of the situation represented at the end of previous defrosting running.And, at this, when no longer meeting pattern 4 jump condition, even if only by stopping supplying to indoor heat converter 42a, 42b the defrosting that heating capacity carries out outdoor heat converter 23, also the defrosting of impossible generation chamber outer heat-exchanger 23 is not enough, meets mode 3 recover condition.
But when previous defrosting running is the defrosting running of pattern 4, sometimes only by carrying out communicating pipe recuperation of heat running and carrying out the defrosting of outdoor heat converter 23, the defrosting that can not solve outdoor heat converter 23 is not enough.So, when previous defrosting running is the defrosting running of pattern 4, determine whether to meet pattern 5 and 6 jump condition.Further, when meeting pattern 5 and 6 jump condition, the defrosting running of the pattern 5 of step ST5 or the pattern 6 of step ST6 is carried out.At this, pattern 5 and 6 jump condition is for determining whether based on the outdoor heat exchange outlet temperature Tol2 of the situation represented at the end of previous defrosting operates the condition that the defrosting that should translate into pattern 5,6 from the defrosting of pattern 4 operates.And, at this, than the 4th defrosting running of regulation, outdoor heat exchange outlet temperature Tol2 at the end of previous defrosting running judges that temperature Tdef4 is (at this, identical with the defrosting of the end operated of referring to the to defrost end temp Tdefe that operates) low, and when carrying out the setting of defrosting running of set model 5 or pattern 6, only by carrying out communicating pipe recuperation of heat running and carrying out the defrosting of outdoor heat converter 23, the defrosting of possible generation chamber outer heat-exchanger 23 is not enough, meets pattern 5 and 6 jump condition.At this, as described above, the recuperation of heat running setting member 81 being arranged at control part 8 is utilized whether to carry out the setting of the defrosting running of pattern 5,6.In addition, as shown in Figure 11 and Figure 15, the defrosting of pattern 5,6 operates at carries out communicating pipe recuperation of heat running and under the state of carrying out the defrosting of outdoor heat converter 23, carry out the indoor heat converter recuperation of heat running by the recuperation of heat making indoor heat converter 42a, 42b be obtained by cold-producing medium as the evaporimeter performance function of cold-producing medium, and carry out the defrosting of outdoor heat converter 23.At this, making indoor heat converter 42a, 42b play function as the evaporimeter of cold-producing medium by indoor expansion valve 41a, the 41b of full cut-off in communicating pipe recuperation of heat running being opened, carrying out the defrosting running (with reference to Figure 15) of pattern 5,6.And, when utilizing the defrosting running of recuperation of heat running setting member 81 set model 5, indoor fan 43a, 43b running is not made just to carry out the first indoor heat converter recuperation of heat running of recuperation of heat, when the defrosting running of set model 6, carry out the second indoor heat converter recuperation of heat running (with reference to Figure 11) that indoor fan 43a, 43b are operated.
In addition, when previous defrosting running is the defrosting running of pattern 5 or pattern 6, sometimes by carry out first indoor heat converter recuperation of heat running or the second indoor heat converter recuperation of heat operate and carry out the defrosting of outdoor heat converter 23, solve outdoor heat converter 23 defrosting deficiency.So, when previous defrosting running is the defrosting running of pattern 5 or pattern 6, determine whether to meet pattern 4 recover condition.Further, when meeting pattern 4 recover condition, the defrosting running of the pattern 4 of step ST4 is carried out.At this, pattern 4 recover condition is the condition for determining whether to revert to from the defrosting running of pattern 5 or pattern 6 the defrosting running of pattern 4 based on the outdoor heat exchange outlet temperature Tol2 of the situation represented at the end of previous defrosting running.And, at this, when no longer meeting pattern 5 and 6 jump condition, even if only by carrying out communicating pipe recuperation of heat running and the defrosting of outdoor heat converter 23 is carried out in the defrosting carrying out outdoor heat converter 23, the defrosting of impossible generation chamber outer heat-exchanger 23 is not enough, meets pattern 4 recover condition.In addition, equally, in the defrosting running of above-mentioned pattern 5,6, outside control part 38 not only determine to form outdoor unit 2 equipment (compressor 21, switching mechanism 22,27, outdoor expansion valve 24, outdoor fan 25 and accumulation of heat expansion valve 29) control content, also determine the control content of the equipment (indoor expansion valve 41a, 41b, indoor fan 43a, 43b) forming indoor unit 4a, 4b.
Like this, at this, utilizing in the defrosting running of running with accumulation of heat, only passing through the heating capacity reducing indoor heat converter 42a, 42b, when can not realize the defrosting ability of outdoor heat converter 23, just carrying out the such recuperation of heat running of pattern 4 ~ pattern 6 by not carrying out heating running, the defrosting ability of outdoor heat converter 23 can be guaranteed.In addition, at this, before defrosting running (indoor heat converter recuperation of heat running) carrying out pattern 5 or pattern 6, carry out the defrosting running (communicating pipe recuperation of heat running) of pattern 4, but also can omit the defrosting running of pattern 4.Such as when meeting pattern 4 jump condition, also the defrosting running of pattern 5 or pattern 6 can be transferred to from the defrosting of mode 3, when meeting pattern 4 recover condition, the defrosting running of mode 3 also can be reverted to from the defrosting running of pattern 5 or pattern 6.But, in the viewpoint of trying one's best the comfortableness in holding chamber, it is desirable that carried out the defrosting running of pattern 4 before the defrosting running carrying out pattern 5 or pattern 6.
In addition, at this, operate as indoor heat converter recuperation of heat, have: the first indoor heat converter recuperation of heat running, in this first indoor heat converter recuperation of heat running, do not make indoor fan 43a, 43b operate, suppress the impact on air conditioned spaces, and reclaim heat in heat exchanger 42a, 42b indoor; And second indoor heat converter recuperation of heat running, in this second indoor heat converter recuperation of heat running, by making indoor fan 43a, 43b operate, make to increase the impact of air conditioned spaces, but can reclaim and to operate many heats than the first indoor heat converter recuperation of heat.Therefore, can when the degree of the defrosting ability of the outdoor heat converter 23 required be less, carry out the first indoor heat converter recuperation of heat running, and in the more situation of the defrosting ability of the outdoor heat converter 23 required, carry out the second indoor heat converter recuperation of heat running.Thus, the two kinds of indoor heat converter recuperation of heat runnings using the degree of recuperation of heat different can be separated as required, to guarantee the defrosting ability of outdoor heat converter 23 at this.
In addition, at this, utilize the recuperation of heat running setting member 81 being arranged at control part 8 utilizing in the defrosting running of running with accumulation of heat, whether setting is simultaneously or forbid carrying out recuperation of heat running.Further, such as, at cold district, utilizing the setting implementing to carry out recuperation of heat running in the defrosting of running running with accumulation of heat, in warm area, the setting not carrying out recuperation of heat running can be implemented in the defrosting running with accumulation of heat utilization running.Thus, can set whether carry out recuperation of heat running according to the meteorological condition etc. in the area arranging aircondition 1 at this.
In addition, at this, when utilizing recuperation of heat running setting member 81 to carry out recuperation of heat running in the defrosting running with accumulation of heat utilization running simultaneously, any one in three recuperations of heat runnings (communicating pipe recuperation of heat operates, the first indoor heat converter recuperation of heat operates and the second indoor heat converter recuperation of heat running) also can be set.
Thus, at this, also can according to the meteorological condition etc. in area arranging aircondition 1, which recuperation of heat running setting carries out.
In addition, when when carrying out the such recuperation of heat of pattern 4 ~ pattern 6 in utilizing the defrosting of running to operate with accumulation of heat and operate simultaneously, it is desirable that carry out defrosting running continually, and in the accumulation of heat running carried out before defrosting running, carry out accumulation of heat to heat-storing material fully.
So, at this as shown in figure 11, when when carrying out recuperation of heat running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, at the end of accumulation of heat running, defrosting running is carried out.Therefore, can carry out defrost running before accumulation of heat running in reliably carry out accumulation of heat to heat-storing material, and by omit carry out accumulation of heat running after heat running, can shorten defrosting running between Δ tbet interval time.
Thus, at this, when when carrying out recuperation of heat running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, the frequency of defrosting running can be increased, and the heat of accumulated heat-storing material can be utilized fully, the defrosting running utilizing running with accumulation of heat can be carried out well.
In addition, in the defrosting running of the pattern 4 ~ pattern 6 added in this variation, also operate same with the defrosting of pattern 1 ~ mode 3, outside control part 38 not only determines the control content of the equipment forming outdoor unit 2, also determines the control content of the equipment forming indoor unit 4a, 4b.Therefore, outside control part 38 can carry out blanket control to utilizing with accumulation of heat the equipment of aircondition 1 entirety in the defrosting of running running, suitably carries out the control of each equipment.
(6) variation 3
In above-mentioned embodiment and variation 1,2, as shown in Fig. 9 and Figure 12, utilizing in the defrosting running of running with accumulation of heat, the outdoor heat exchange outlet temperature Tol2 of the index of the situation at the end of the outdoor temperature Ta of the index of situation when starting based on the running that representatively defrosts and/or representatively previous defrosting operate, changes the defrosting ability of outdoor heat converter 23.
But the index representing the situation at the end of previous defrosting running is not limited thereto.Such as, when terminating defrosting running when reach defrosting running more than the end temp Tdefe of regulation at outdoor heat exchange outlet temperature Tol2, also can use the previous time tdef needed for defrosting running.
Namely, in the change process of the defrosting operation mode of Fig. 9 and Figure 12, as long as this condition of " the outdoor heat exchange outlet temperature Tol2 at the end of previous defrosting running is lower than defrosting running judgement temperature Tdef1, Tdef2, Tdef3, Tdef4 " to be changed into this condition of " the time tdef needed for previous defrosting running is larger than official hour ".In addition, this condition of " the outdoor heat exchange outlet temperature Tol2 at the end of the defrosting running of first three time is defrosting running and judges temperature Tdef1, more than Tdef2 " is changed into this condition of " the time tdef needed for the defrosting running of first three time is below official hour ".
Like this, at this, utilizing with accumulation of heat in the defrosting running of running, based on the time tdef needed for outdoor temperature Ta and/or previous defrosting running, changing needing the defrosting ability of carrying out the outdoor heat converter 23 changed according to the meteorological condition etc. in the area arranging aircondition 1.Therefore, with above-mentioned embodiment and variation 1,2 same, utilizing in the defrosting running of running with accumulation of heat, the defrosting ability of outdoor heat converter 23 can be made to tackle the meteorological condition etc. in the area that aircondition 1 is set by the square.Thereby, it is possible to utilize the heat-storage heat exchanger 28 with the heat-storing material of specified vol to tackle area widely.In addition, at this, utilizing in the defrosting running of running with accumulation of heat, can proceed to heat running as far as possible, and the defrosting ability of outdoor heat converter 23 can be guaranteed.
In addition, when previous defrosting running needed for time, tdef was longer, it is desirable that carry out continually defrosting running and carry out well defrosting operate.In addition, when when carrying out recuperation of heat running in utilizing the defrosting of running to operate with accumulation of heat simultaneously, it is desirable that carry out defrosting running continually, and in the accumulation of heat running carried out before defrosting running, carry out accumulation of heat to heat-storing material fully.
So, at this, with above-mentioned variation 1,2 same, change Δ tbet interval time between defrosting running based on the time needed for outdoor temperature Ta and/or previous defrosting running.In the situation (at this, being the situation of the defrosting running carrying out pattern 2) that time such as needed for previous defrosting running is longer, as shown in Figures 10 and 11, carry out making the change that interval time, Δ tbet shortened between defrosting running.In addition, when carrying out the situation of recuperation of heat running (at this in utilizing the defrosting of running to operate with accumulation of heat simultaneously, the situation of the defrosting running carrying out mode 3 ~ pattern 6) under, same with variation 2 (with reference to Figure 11), at the end of accumulation of heat running, carry out defrosting running.
Thus, at this, according to needing the frequency changing defrosting running, the defrosting running utilizing running with accumulation of heat can be carried out well.In addition, can defrosting running before accumulation of heat running in reliably carry out accumulation of heat to heat-storing material, and by omit accumulation of heat running after heat running, can shorten defrosting running between Δ tbet interval time.
Industrial practicality
The present invention can be widely used in following this aircondition, namely, this aircondition comprises refrigerant loop, and carry out accumulation of heat running, carry out accumulation of heat utilize running and heat running simultaneously, wherein, above-mentioned refrigerant loop has the heat-storage heat exchanger making to carry out heat exchange between cold-producing medium and heat-storing material, above-mentioned accumulation of heat running refers to by making heat-storage heat exchanger play function as the radiator of cold-producing medium and carries out the running of accumulation of heat to heat-storing material, above-mentioned accumulation of heat utilizes running to refer to by making heat-storage heat exchanger carry out the running of dispelling the heat as the evaporimeter performance function of cold-producing medium from heat-storing material when defrosting running.
(symbol description)
1 ... aircondition;
10 ... refrigerant loop;
21 ... compressor;
23 ... outdoor heat converter;
28 ... heat-storage heat exchanger;
29 ... accumulation of heat expansion valve;
41a, 41b ... indoor expansion valve;
42a, 42b ... indoor heat converter;
43a, 43b ... indoor fan;
81 ... recuperation of heat running setting member.
Prior art document
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2005-337657 publication

Claims (9)

1. an aircondition (1), comprise refrigerant loop (10), this refrigerant loop (10) has compressor (21), outdoor heat converter (23), indoor heat converter (42a, 42b) and heat-storage heat exchanger (28), this heat-storage heat exchanger (28) carries out heat exchange between cold-producing medium and heat-storing material
Described aircondition (1) carries out accumulation of heat running, and can accumulation of heat utilization running be carried out when defrosting running simultaneously and heat running, wherein, described accumulation of heat running refers to by making described heat-storage heat exchanger play function as the radiator of described cold-producing medium and carries out the running of accumulation of heat to described heat-storing material, described defrosting running refers to by making described outdoor heat converter play function as the radiator of described cold-producing medium and carries out the running of the defrosting of described outdoor heat converter, described accumulation of heat utilizes running to refer to by making described heat-storage heat exchanger carry out the running of dispelling the heat as the evaporimeter performance function of described cold-producing medium from described heat-storing material, it is described that to heat running be instigate described indoor heat converter to play the running of function as the radiator of described cold-producing medium,
The feature of described aircondition is,
In the described defrosting running utilizing running with described accumulation of heat, based on temperature, i.e. outdoor heat exchange outlet temperature or the previous described time needed for operating of defrosting of the cold-producing medium of the outlet of the described outdoor heat converter supplied at the end of the outdoor temperature of the space outerpace of described outdoor heat converter configuration and/or previous described defrosting running, change the defrosting ability of described outdoor heat converter.
2. aircondition (1) as claimed in claim 1, is characterized in that,
In the described defrosting running utilizing running with described accumulation of heat, described outdoor heat exchange outlet temperature at the end of requiring to carry out based on described outdoor temperature and/or previous described defrosting running or the time needed for previous described defrosting running are when increasing the change of the defrosting ability of described outdoor heat converter (23), heat running described in carrying out simultaneously, and reduce the heating capacity of described indoor heat converter (42a, 42b).
3. aircondition (1) as claimed in claim 2, is characterized in that,
When heating running described in carrying out in the described defrosting running utilizing running with described accumulation of heat simultaneously, based on the described outdoor heat exchange outlet temperature at the end of described outdoor temperature and/or previous described defrosting running or the time needed for previous described defrosting running, change the interval time between described defrosting running.
4. aircondition (1) as claimed in claim 2 or claim 3, is characterized in that,
In the described defrosting running utilizing running with described accumulation of heat, described outdoor heat exchange outlet temperature at the end of requiring to carry out based on described outdoor temperature and/or previous described defrosting running or the time needed for previous described defrosting running are when increasing the change of the defrosting ability of described outdoor heat converter (23) further, stop to the interior the supply system cryogen of described indoor heat converter (42a, 42b), and carry out the defrosting of described outdoor heat converter (23).
5. aircondition (1) as claimed in claim 4, is characterized in that,
In the described defrosting running utilizing running with described accumulation of heat, described outdoor heat exchange outlet temperature at the end of requiring to carry out based on described outdoor temperature and/or previous described defrosting running or the time needed for previous described defrosting running are when increasing the change of the defrosting ability of described outdoor heat converter (23) further, carry out communicating pipe recuperation of heat running and/or indoor heat converter recuperation of heat running, wherein, the recuperation of heat running of described communicating pipe refers to that heat that refrigerant pipe is possessed carries out the running of reclaiming, this refrigerant pipe is by described indoor heat converter (42a, 42b) with between described compressor (21) be connected, described indoor heat converter recuperation of heat running refers to the running by making described indoor heat converter reclaim the heat that cold-producing medium obtains as the evaporimeter performance function of cold-producing medium.
6. aircondition (1) as claimed in claim 5, is characterized in that,
Described aircondition (1) is also provided with the indoor fan (43a, 43b) supplying air to described indoor heat converter (42a, 42b),
Described indoor heat converter recuperation of heat running has the first indoor heat converter recuperation of heat running not making described indoor fan operate and the second indoor heat converter recuperation of heat running that described indoor fan is operated.
7. the aircondition (1) as described in claim 5 or 6, is characterized in that,
In the described defrosting running utilizing running with described accumulation of heat, when carrying out described communicating pipe recuperation of heat running and/or described indoor heat converter recuperation of heat running, at the end of described accumulation of heat running, all carry out described defrosting running.
8. the aircondition (1) according to any one of claim 5 to 7, is characterized in that,
Described aircondition (1) is provided with recuperation of heat running setting member (81), this recuperation of heat running setting member (81) is for being set as follows item, namely, in the described defrosting running utilizing running with described accumulation of heat, allow or forbid carrying out described communicating pipe recuperation of heat running and/or described indoor heat converter recuperation of heat running.
9. aircondition (1) as claimed in claim 8, is characterized in that,
Described recuperation of heat running setting member (81) can set described communicating pipe recuperation of heat running, described first indoor heat converter recuperation of heat running and described second indoor heat converter recuperation of heat running respectively in the described defrosting running utilizing running with described accumulation of heat.
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EP2860474A4 (en) 2015-06-03

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