CN106958889B - Conditioner - Google Patents
Conditioner Download PDFInfo
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- CN106958889B CN106958889B CN201610773245.7A CN201610773245A CN106958889B CN 106958889 B CN106958889 B CN 106958889B CN 201610773245 A CN201610773245 A CN 201610773245A CN 106958889 B CN106958889 B CN 106958889B
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- Prior art keywords
- heat exchanger
- outdoor heat
- defrosting
- outdoor
- compressor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/22—Disposition of valves, e.g. of on-off valves or flow control valves between evaporator and compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/006—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass for preventing frost
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The present invention provides conditioner (1A), it includes compressor (11), multiple outdoor heat exchanger (the 15a being arranged in parallel relative to compressor (11), 15b), by each outdoor heat exchanger (15a, 15b) outdoor expansion valve (the 16a being arranged, 16b) and indoor heat exchanger (22a, 22b), and include: with defrosting when as refrigerant inflow entrance outdoor heat exchanger (15a, connector (the 25a of side 15b), 25b) connecting tube (the 113a connected, in 113a), by each outdoor heat exchanger (15a, 15b) valve gear (the 130a being arranged, 130b)；With from connecting tube (113a, 113a) branch, the bypass circulation (17a, 17b) for being connected to the connector (25a, 25b) of a side of outdoor heat exchanger (15a, 15b) with the suction inlet (11a) of compressor (11) by the switching of valve gear (130a, 130b).
Description
Technical field
The present invention relates to outdoor unit and Duo Tai indoor unit, can implement more indoor units refrigeration operation or
The conditioner of heating operating.
Background technique
All the time, exist with outdoor unit and Duo Tai indoor unit, the refrigeration fortune that more indoor units can be implemented
Turn or heating operating conditioner.In these conditioners, outdoor unit include compressor, it is multiple each other
The outdoor heat exchanger that is arranged in parallel, by the setting of each outdoor heat exchanger outdoor expansion valve and allow hand over the stream of refrigerant
The switching valve in road direction.Unit includes indoor heat exchanger and indoor expansion valve indoors.Outdoor unit passes through with indoor unit
It is piped and is connected between unit.Piping has the system with the compressor of the indoor heat exchanger and outdoor unit of indoor unit between unit
The tracheae and distinguish with the outdoor expansion valve of the indoor expansion valve of indoor unit and outdoor unit that cryogen suction line is separately connected
The liquid pipe of connection.
According to above structure, in heating, outdoor heat exchanger becomes evaporator, and the refrigerant of low temperature flow to outdoor heat and hands over
Parallel operation carries out heat exchange with air, and the moisture in air condenses in the fin of outdoor heat exchanger and generates frost.When in outdoor heat
When exchanger frosting, the heat exchange with air, heating reduced performance not can be carried out.
Therefore, in existing conditioner, in order to remove the frost generated in outdoor heat exchanger, refrigerant is made to exist
The direction circulation opposite with heating, makes the refrigerant of high temperature flow to outdoor heat exchanger, being able to carry out makees outdoor heat exchanger
For the reverse cycle defrosting (hereinafter referred to as defrosting) that condenser plays a role and dissolves frost.That is, being transported in the defrosting with refrigeration
Refrigerant is similarly flowed when turning in conditioner.
In the existing structure, the compressor side of each outdoor heat exchanger is provided with open and close valve, works as outdoor heat exchanger
Temperature rise and be judged as completion defrosting when becoming specified value or more, carry out closing the open and close valve that connect with the outdoor heat exchanger
Movement.By the action, it can be avoided refrigerant and retain in the outdoor heat exchanger after completing defrosting, and to unfinished defrosting
Outdoor heat exchanger supply enough refrigerants, improve defrosting performance.But exist due to closing open and close valve and refrigerant
The case where being risen by sharp blocking, high pressure moment is flowed into, becomes abnormal high pressure, there are compressor stopping, the interruption that defrosts is asked
Topic.
In order to solve these problems, motion has patent document 1.The structure of Fig. 7 expression patent document 1.By being connected with outdoor
The refrigerant circuit of unit 40 and indoor unit 50 is constituted, and wherein the outdoor unit 40 includes compressor 41, switching valve 42, outdoor
Heat exchanger 43a, 43b, outdoor expansion valve 44a, 44b, the indoor unit 50 include indoor expansion valve 51 and indoor heat exchanger
52。
In defrosting, such as when the temperature of outdoor heat exchanger 43a becomes specified value or more, it is judged as that defrosting is completed,
Close the movement of outdoor expansion valve 44a corresponding with the outdoor heat exchanger 43a after defrosting is completed.It is single indoors as a result,
The refrigerant flow of 50 flowing of member tails off, and refrigerant is easy heat exchanger 52 indoors and evaporates, the thus sucking of compressor 41
Temperature becomes larger.According to the rising of the degree of superheat, open the movement of indoor expansion valve 51 and increase refrigerant flow, but work as
When the aperture of indoor expansion valve 51 becomes specified value or more, it is judged as that the refrigerant flow flowed into from outdoor unit 40 is reduced, into
Row opens the movement of outdoor expansion valve 44a.By the action, the pressure sharply being able to suppress in defrosting rises, and prevents from defrosting
It interrupts, so that defrosting can continue to.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2010-203673 bulletin
Summary of the invention
Problems to be solved by the invention
But in the above prior art, it cannot cope with to prevent from becoming in defrosting on the basis of implementing defrosting and inhale
The case where temperature of the indoor heat exchanger of heat source declines and limits heat absorption connects the feelings that indoor unit is few and heat sink is minimum
Condition has the following problems: caloric receptivity is reduced, and compressor inlet temperature reduces, and condensation temperature is difficult to rise, therefore multiple outdoor heat
Exchanger cannot be completed to defrost, and defrosting time is elongated, and thus the heating time shortens, and the comfort of user reduces.
The present invention proposes in order to solve the above problems, it is intended that can offer in the case that heat sink is small
The shortening for enough realizing defrosting time, the conditioner for shortening heating dwell time and improving the comfort of user.
A technical solution to solve project
In order to achieve the above object, the present invention provides a kind of conditioner comprising compressor, relative to above-mentioned pressure
Multiple outdoor heat exchangers that contracting machine is arranged in parallel, by the outdoor expansion valve and Indoor Thermal of each above-mentioned outdoor heat exchanger setting
Exchanger, the conditioner are characterised by comprising: as the above-mentioned outdoor heat of the inflow entrance of refrigerant when with defrosting
In the connecting tube of the connector connection of one side of exchanger, by the valve gear of each outdoor heat exchanger setting；With from above-mentioned
Connecting tube branch, the connector that a side of above-mentioned outdoor heat exchanger is made by the switching of above-mentioned valve gear and above-mentioned compressor
The bypass circulation of suction inlet connection.
In addition, the present invention is characterized in that: in above-mentioned conditioner, including control unit, the control unit are defrosting
When the defrosting object outdoor heat exchanger that defrosts is selected from above-mentioned multiple outdoor heat exchangers, switch above-mentioned valve gear,
By be not it is described defrosting object outdoor heat exchanger outdoor heat exchanger one side connector and above-mentioned bypass circulation
Connection.
In addition, it is a feature of the present invention that above-mentioned valve gear includes: in above-mentioned compression in above-mentioned conditioner
By the first open and close valve of each outdoor heat exchanger setting between the outlet of machine and above-mentioned outdoor heat exchanger；With from upper
State the above-mentioned bypass by each above-mentioned outdoor heat exchanger setting of branch between the first open and close valve and above-mentioned outdoor heat exchanger
Respectively arranged second open and close valve in circuit.
In addition, the present invention is characterized in that: in above-mentioned conditioner, above-mentioned control unit makes in defrosting and is not
Above-mentioned defrosting object outdoor heat exchanger outdoor heat exchanger connection above-mentioned first open and close valve and above-mentioned outdoor expansion valve at
It is in off state, makes above-mentioned second open and close valve connecting with the outdoor heat exchanger for not being above-mentioned defrosting object outdoor heat exchanger
As opening state.
In addition, the present invention is characterized in that: in above-mentioned conditioner, above-mentioned valve gear includes with by above-mentioned outdoor
The mode that the connector of one side of heat exchanger and the outlet side of above-mentioned compressor connect or connect with above-mentioned bypass circulation
The heat exchanger switching valve switched over.
In addition, the present invention is characterized in that: in above-mentioned conditioner, above-mentioned control unit switches above-mentioned in defrosting
Heat exchange switching valve, by be not above-mentioned defrosting object outdoor heat exchanger outdoor heat exchanger a side connector with it is above-mentioned
Bypass circulation connection.
In addition, the present invention is characterized in that: in above-mentioned conditioner, above-mentioned multiple outdoor heat exchangers are upper and lower
It is arranged side by side on direction, the higher above-mentioned room in the position of above-mentioned control unit from the lowest level heat-exchange tube of above-mentioned outdoor heat exchanger
Outer heat-exchanger rises and successively defrosts.
In addition, the present invention is characterized in that: in above-mentioned conditioner, above-mentioned multiple outdoor heat exchangers are in left and right
It is arranged side by side on direction, above-mentioned control unit is from the heat-exchange tube gas side inlet of above-mentioned outdoor heat exchanger to above-mentioned compressor
The shorter above-mentioned outdoor heat exchanger of the piping length of suction inlet rises and successively defrosts.
Invention effect
In conditioner of the invention, such as even if heat absorption will not be insufficient, energy in the case where heat sink is small
Enough sufficiently to obtain the required heat of defrosting, condensation temperature is easy to rise, and defrosting quickly completes, and heating dwell time shortens, can
Improve the comfort of user.
In addition, defrosting object outdoor heat exchanger capacity is smaller relative to heat by being performed in multiple times defrosting, outdoor heat
The condensation duty of exchanger is small, and the temperature of outdoor heat exchanger is easy to rise, therefore reliably frost can be made to dissolve, and is able to suppress
Reduced performance when heating caused by residual frost is restored.
Detailed description of the invention
Fig. 1 is the figure for indicating the refrigerant circuit of conditioner of embodiments of the present invention.
The figure of one example of the relationship of heat when Fig. 2 is the defrosting for indicating outdoor heat exchanger.
Fig. 3 is the flow chart for indicating the movement of control unit when carrying out defrosting operating.
Fig. 4 is the schematic diagram for the structure for indicating that multiple outdoor heat exchangers are arranged above and below.
Fig. 5 is the schematic diagram for indicating the structure of multiple outdoor heat exchanger left-right situs.
Fig. 6 is the figure for indicating the refrigerant circuit of conditioner of second embodiment of the present invention.
Fig. 7 is the figure for indicating the refrigerant circuit of the conditioner of embodiment of the prior art.
Specific embodiment
< first embodiment >
Fig. 1 is the refrigerant loop figure of the conditioner 1A of first embodiment of the invention.
As shown in Figure 1, conditioner 1A includes outdoor unit 10, multiple indoor unit 20a, 20b, junction chamber list outside
30 are piped between member 10 and the unit of indoor unit 20a, 20b.Piping 30 includes liquid pipe 31 and tracheae 32 between unit.Indoor unit
20a, 20b are connected in parallel relative to liquid pipe 31, tracheae 32.
Outdoor unit 10 include compressor 11, switching valve 12, outdoor heat exchanger 15a, 15b, outdoor expansion valve 16a,
16b, the gentle tube connection ports 19 of liquid pipe connector 18.In addition, outdoor unit 10 includes opening as the first of valve gear 130a, 130b
Valve closing 13a, 13b and second open and close valve 14a, 14b and bypass circulation 17a, 17b.One end of liquid pipe 31 and outdoor unit 10
Liquid pipe connector 18 connects, and one end of tracheae 32 connect with the tracheae connector 19 of outdoor unit 10, the other end of liquid pipe 31 and
Indoor expansion valve 21a, 21b connection, the other end of tracheae 32 are connect with indoor heat exchanger 22a, 22b.
Switching valve 12 can be with by the connector of the discharge side of compressor 11 and a side of outdoor heat exchanger 15a, 15b
The mode of any one of 25a, 25b or tracheae connector 19 connection switches over.Conditioner 1A is set to freeze
When operating, or when carrying out the defrosting operating of outdoor heat exchanger 15a, 15b, by the discharge side of compressor 11 and outdoor heat exchange
The mode of connector 25a, 25b connection of a side of device 15a, 15b switches switching valve 12.Make conditioner 1A
When warm operating, switch switching valve 12 in a manner of connecting the discharge side of compressor 11 with tracheae connector 19.In this way, air tune
Regulating device 1A can carry out refrigeration operation by the switching of switching valve 12, heating operates and defrosting operates.
Outdoor heat exchanger 15a, 15b are the heat exchangers of identical capacity, are arranged in parallel relative to compressor 11.By room
The connecting tube being attached between connector 25a, 25b and switching valve 12 of a side (side) of outer heat-exchanger 15a, 15b
113a, 113b are respectively arranged with first open and close valve 13a, 13b.First open and close valve 13a, 13b is constituted are as follows: by beating it respectively
It opens and refrigerant is flowed in connecting tube 113a, 113b, the system in connecting tube 113a, 113b is made and being turned off
The flowing of cryogen stops.In addition, connector 26a, 26b connection of another party (other side) in outdoor heat exchanger 15a, 15b
There are outdoor expansion valve 16a, 16b of the refrigerant flow that can adjust outdoor heat exchanger 15a, 15b.
In addition, a side of outdoor heat exchanger 15a, 15b connector 25a, 25b and compressor 11 suction inlet it
Between, it is connected with bypass pipe 117a, 117b from connecting tube 113a, 113b difference branch.By bypass pipe 117a, 117b, formed
The bypass circulation for being connected to connector 25a, 25b of a side of outdoor heat exchanger 15a, 15b with the suction inlet of compressor 11
17a,17b.In bypass pipe 117a, 117b, it is respectively arranged with second open and close valve 14a, 14b.Second open and close valve 14a, 14b is constituted
Are as follows: and opening it respectively refrigerant is flowed in bypass circulation 17a, 17b, to bypass and being turned off
The flowing of refrigerant in circuit 17a, 17b stops.Bypass circulation 17a, 17b be above-mentioned first open and close valve 13a, 13b with it is upper
It states and reaches the suction inlet 11a's of above-mentioned compressor 11 from connecting tube 113a, 113b branch between outdoor heat exchanger 15a, 15b
Circuit, each setting to above-mentioned outdoor heat exchanger 15a, 15b.
Indoor unit 20a, 20b are respectively provided with indoor expansion valve 21a, 21b and indoor heat exchanger 22a, 22b.
Conditioner 1A can use outdoor heat exchanger 15a, 15b as cold by the switching switching of switching valve 12
The refrigeration operation of condenser and use indoor heat exchanger 22a, 22b as condenser heating operating and acted.
Conditioner 1A includes control unit 100, to switch compressor 11, first open and close valve 13a, 13b, second open
Valve closing 14a, 14b and switching valve 12 and carry out refrigeration operation, heating operating and it is aftermentioned defrosting operating in any operating side
Formula controls each section.
Control unit 100 includes CPU (not shown), nonvolatile memory, RAM etc., read and execute be stored in it is non-volatile
Property memory control program, control conditioner 1A each section.
Control unit 100 keeps first open and close valve 13a, 13b, outdoor swollen when making indoor unit 20a, 20b carry out refrigeration operation
Swollen valve 16a, 16b, indoor expansion valve 21a, 21b are in an open state.Moreover, control unit 100 closes second open and close valve 14a, 14b
Closed state.In addition, control unit 100 switches switching in a manner of the discharge side of connect compressor 11 and first open and close valve 13a, 13b
Valve 12.In this way, control unit 100 make compressor 11, switching valve 12, first open and close valve 13a, 13b, outdoor heat exchanger 15a, 15b,
Outdoor expansion valve 16a, 16b, liquid pipe connector 18, indoor expansion valve 21a, 21b, indoor heat exchanger 22a, 22b, tracheae connection
Mouth 19, switching valve 12 and compressor 11 are sequentially communicated.
As a result, as shown in figure 1 as shown in the arrow of solid line, control unit 100 makes from compressor 11 through 111 row of discharge pipe
Refrigerant out is radiated in outdoor heat exchanger 15a, 15b and is condensed, via liquid pipe 31 supply to indoor unit 20a,
20b.Then, control unit 100 makes heat exchanger 22a, 22b heat absorption indoors and the refrigerant after evaporation returns to room via tracheae 32
Outer unit 10 returns to compressor 11 via suction line 112, recycles in refrigerant circuit.
In addition, control unit 100 make indoor unit 20a, 20b carry out heating operating when, make first open and close valve 13a, 13b,
Outdoor expansion valve 16a, 16b, indoor expansion valve 21a, 21b are in an open state.Moreover, control unit 100 make the second open and close valve 14a,
14b is in off state.In addition, control unit 100 is switched in a manner of the discharge side of connect compressor 11 and tracheae connector 19
Change valve 12.In this way, control unit 100 makes compressor 11, switching valve 12, tracheae connector 19, indoor heat exchanger 22a, 22b, room
Interior expansion valve 21a, 21b, liquid pipe connector 18, outdoor expansion valve 16a, 16b, outdoor heat exchanger 15a, 15b, the first open and close valve
13a, 13b, switching valve 12 and compressor 11 are sequentially communicated.
As a result, as shown in figure 1 as shown in the arrow of dotted line, control unit 100 will be from compressor 11 through 111 row of discharge pipe
Refrigerant out is supplied via tracheae 32 to indoor unit 20a, 20b.Control unit 100 make indoors heat exchanger 22a, 22b dissipate
Hot and condensed refrigerant returns to outdoor unit 10 through liquid pipe 31, absorbs heat and evaporates in outdoor heat exchanger 15a, 15b, through inhaling
Enter pipe 112 and return to compressor 11, is recycled in refrigerant circuit.
In heating operating, aerial moisture is deposited in the fin condensation of outdoor heat exchanger 15a, 15b and generates frost
The case where.In outdoor heat exchanger 15a, 15b frosting, the heat exchange with air not can be carried out, heating ability reduces, therefore
When becoming the condition of prediction meeting frosting, control unit 100 carries out the defrosting operating of outdoor heat exchanger 15a, 15b.
Fig. 3 is the flow chart for indicating the movement of the control unit 100 when carrying out defrosting operating.Control unit 100 is in air conditioning
When the heating operating of device 1A, the defrosting operating (step S1) of outdoor heat exchanger 15a, 15b are determined a need for.For example, control
Portion 100 processed can use following manner: outdoor heat exchanger 15a, 15b refrigerant temperature for preset threshold value below
Be judged to needing to defrost when (such as -10 DEG C or less) operating.At this point, outdoor unit 10 be provided with heating operating when measurement from
The temperature sensing (not shown) of the temperature of the refrigerant of connector 25a, 25b outflow of a side of outdoor heat exchanger 15a, 15b
Device.Control unit 100 can use following manner: obtaining the refrigerant temperature of the temperature sensor measurement, determine refrigerant temperature
It whether is preset threshold value or less.Control unit 100 can also use following manner: except outdoor heat exchanger 15a, 15b
Defrosting operating is determined a need for also according to outer gas dry-bulb temperature, wet-bulb temperature other than refrigerant temperature.In addition, control unit 100
Following manner can also be used: according to outside outer gas dry-bulb temperature, wet-bulb temperature and the outdoor heat inputted from various sensors
The refrigerant temperature of exchanger 15a, 15b determine a need for defrosting operating.
Control unit 100 be judged to needing to defrost operate when (step S1: being (Yes)), be first begin to the defrosting of first time
Operating.In the defrosting operating of first time, control unit 100 carries out the outdoor heat exchange of any of outdoor heat exchanger 15a, 15b
The defrosting of device.In the present embodiment, illustrate that control unit 100 carries out the defrosting of first time to outdoor heat exchanger 15a below
Situation.
Control unit 100 makes the first open and close valve 13a, outdoor expansion valve 16a, the second open and close valve to start to defrost for the first time
14b, indoor expansion valve 21a, 21b are in an open state, and make the first open and close valve 13b, outdoor expansion valve 16b, the second open and close valve 14a
Closed state.It is cut in addition, control unit 100 is switched in a manner of the discharge side of connect compressor 11 and first open and close valve 13a, 13b
Change valve 12 (step S2).In this way, control unit 100 makes compressor 11, switching valve 12, the first open and close valve 13a, outdoor heat exchanger
15a, outdoor expansion valve 16a, liquid pipe connector 18, indoor expansion valve 21a, 21b, indoor heat exchanger 22a, 22b, tracheae connection
Mouth 19, switching valve 12 and compressor 11 are sequentially communicated, and carry out the defrosting of outdoor heat exchanger 15a.At this point, outdoor heat exchanger
Refrigerant in 15b returns to compressor 11 via bypass pipe 117b.
In this for the first time defrosting, control unit 100 makes the refrigerant for the high temperature being discharged from compressor 11 in outdoor heat exchange
Device 15a radiates and carries out the defrosting of outdoor heat exchanger 15a.The refrigerant come out from outdoor heat exchanger 15a is connected by liquid pipe
Interface 18 is flowed out from outdoor unit 10, flows into indoor unit 20a, 20b via liquid pipe 31.Flow into the system of indoor unit 20a, 20b
Cryogen flows through indoor heat exchanger 22a, 22b and tracheae 32, thus from the piping heat absorption of heat when having accumulated heating, returns outdoor
Unit 10 is inhaled into compressor 11, recycles in refrigerant circuit.In addition, the refrigerant retained in outdoor heat exchanger 15b
Compressor 11 is returned by bypass pipe 117b.
Control unit 100 determines whether the temperature of the refrigerant of the outdoor heat exchanger 15a in defrosting operating reaches specified value
(such as 15 DEG C or more) (step S3) above.Control unit 100 reaches in the temperature for the refrigerant for detecting outdoor heat exchanger 15a
When more than specified value (step S3: yes), it is judged as that defrosting is completed, terminates the defrosting operating (step of first outdoor heat exchanger 15a
Rapid S4).
Then, control unit 100 starts secondary defrosting operating (step S5).In secondary defrosting operating, carry out
Another outdoor heat exchange except the outdoor heat exchanger of defrosting operating for the first time has been carried out in outdoor heat exchanger 15a, 15b
The defrosting of device.
In the present embodiment, the case where second of defrosting operating of explanation carries out outdoor heat exchanger 15b below.
Control unit 100 makes the first open and close valve 13b, outdoor expansion valve 16b, the second opening and closing from the state of first time defrosting
Valve 14a is in an open state, and is in off state the first open and close valve 13a, outdoor expansion valve 16a, the second open and close valve 14b.In the shape
Under state, switch switching valve 12 in a manner of the discharge side of connect compressor 11 and first open and close valve 13a, 13b.In this way, control unit
100 make compressor 11, switching valve 12, the first open and close valve 13b, outdoor heat exchanger 15b, outdoor expansion valve 16b, liquid pipe connector
18, indoor expansion valve 21a, 21b, indoor heat exchanger 22a, 22b, tracheae connector 19, switching valve 12 and compressor 11 be successively
Connection carries out the defrosting of outdoor heat exchanger 15b.At this point, the refrigerant in outdoor heat exchanger 15a is returned via bypass pipe 117a
Return compressor 11.
In second of defrosting, control unit 100 makes the refrigerant for the high temperature being discharged from compressor 11 in outdoor heat exchanger
15b heat dissipation, carries out the defrosting of outdoor heat exchanger 15b.The refrigerant come out from outdoor heat exchanger 15b passes through liquid pipe connector
18 flow out from outdoor unit 10, flow into indoor unit 20a, 20b via liquid pipe 31.Flow into the refrigerant of indoor unit 20a, 20b
By indoor heat exchanger 22a, 22b and tracheae 32, thus from the piping heat absorption of heat when having accumulated heating, outdoor unit is returned to
10, it is inhaled into compressor 11, is recycled in refrigerant circuit.In addition, the refrigerant retained in outdoor heat exchanger 15a passes through
Bypass pipe 117a returns to compressor 11.
Control unit 100 determines whether the temperature of the refrigerant of the outdoor heat exchanger 15b in defrosting operating reaches specified value
(such as 15 DEG C or more) (step S6) above.Control unit 100 reaches in the temperature for the refrigerant for detecting outdoor heat exchanger 15b
When more than specified value (step S6: yes), it is judged as that defrosting is completed, terminates the defrosting to second outdoor heat exchanger 15b and operate
(step S7).
In the present embodiment, control unit 100 uses the outdoor heat exchanges of two will be arranged in parallel relative to compressor 11
The structure that device 15a, 15b are successively defrosted in two times, can also be using the outdoor heat exchange point that three more parallels are arranged
The structure not defrosted successively.Accordingly it is also possible to using when the defrosting for completing second outdoor heat exchanger 15b operates,
Control unit 100 determines whether to complete the structure of the defrosting operating (step S8) of all outdoor heat exchangers.Furthermore, it is also possible to adopt
Terminate the motion that defrosts when operating used in the defrosting for completing all outdoor heat exchangers, not yet completes defrosting operating existing
Outdoor heat exchanger when repeat step S5~step S8 structure.At this point, control unit 100 makes the outdoor with defrosting operating object
The first open and close valve, the outdoor expansion valve of heat exchanger connection are in an open state and are in off state the second open and close valve.In addition,
Control unit 100 closes the first open and close valve, the outdoor expansion valve that connect with the outdoor heat exchanger for not being defrosting operating object
State and it is in an open state the second open and close valve.Control unit 100 makes the refrigerant for the high temperature being discharged from compressor 11 defrost
The outdoor heat exchanger of operating object radiates and defrosts, and keeps the refrigerant retained in another outdoor heat exchanger logical
It crosses bypass pipe and returns to compressor 11.
Fig. 2 is to indicate that in aggregate capacity be 0.082m3Outdoor heat exchanger 15a, 15b defrosting when, in order in outdoor
Heat exchanger 15a, 15b make the refrigerant of -10 DEG C of refrigerant temperature rise to the figure of heat needed for 15 DEG C.In addition, Fig. 3 institute
Heat needed for the defrosting shown according to refrigerant temperature be -10 DEG C when prediction can frosting condition (outside outer gas dry-bulb temperature 2
DEG C, 1 DEG C of wet-bulb temperature) under, the capacity of outdoor heat exchanger 15a, 15b, defrosting front and back refrigerant temperature change and system
Density/specific heat of cryogen acquires.
In addition, indicating the heat obtained in defrosting from tracheae 32 in Fig. 2.The heat obtained in defrosting from tracheae 32 according to
The temperature change of the refrigerant in tracheae 32 in heating operating before and after the capacity of the tracheae 32 of high temperature refrigerant circulation, defrosting
It is sought with density/specific heat of refrigerant.For example, when defrosting at the same time to outdoor heat exchanger 15a, 15b, the length of tracheae 32
Under the conditions of degree is 500m long like that setting, the heat absorption from tracheae 32 is more, can obtain and defrost to outdoor heat exchanger 15a, 15b
Enough heats.But under the conditions of the length of tracheae 32 is 30m setting short like that, for outdoor heat exchanger 15a, 15b
Capacity, the heat absorption from tracheae 32 is few, cannot obtain the enough heat of defrosting, and outdoor heat exchanger temperature is not easy to reach 15
℃。
In the present embodiment, each outdoor heat exchanger 15a, 15b are divided into and are defrosted respectively twice, therefore for the first time
The capacity of defrosting object outdoor heat exchanger 15a is one of capacity when defrosting simultaneously to outdoor heat exchanger 15a, 15b
Half i.e. 0.041m3.Therefore, one is comparably when the heat for defrosting required is with the defrosting for carrying out outdoor heat exchanger 15a, 15b simultaneously
Half.Furthermore it is possible to after completing to defrost for the first time, be transferred to second of defrosting object outdoor heat exchanger 15b, from first
Secondary defrosting object outdoor heat exchanger 15a heat absorption is so that it is guaranteed that heat.Even if, will not as a result, in the case where heat sink is small
It is insufficient that heat absorption occurs, reliably frost can be made to dissolve, is able to suppress reduced performance when heating caused by frost remains is restored.This
Outside, even if in the case where tracheae 32 is shorter (such as 30m), heat needed for can also ensure that defrosting, so that outdoor heat exchange
Device temperature is easy to reach 15 DEG C.
In the present embodiment, when defrosting operating, it is two that outdoor heat exchanger 15a, 15b that two are arranged in parallel, which are divided to,
It is secondary successively to defrost.It is not in the outdoor heat exchanger 15b of defrosting object outdoor heat exchanger 15a in first time defrosting
Refrigerant flow to compressor 11 from bypass circulation 17b.It is not defrosting object outdoor heat exchanger 15b in second of defrosting
Outdoor heat exchanger 15a in refrigerant flow to compressor 11 from bypass circulation 17a.Implementing as a result, from tracheae 32
When second of defrosting for absorbing heat less, the outdoor heat exchanger 15a of heating it can also absorb heat from first time defrosting, Neng Gouchong
Separately win to obtain the required heat of defrosting.Condensation temperature is easy to rise as a result, can quickly complete defrosting, shortens heating dwell time,
Improve the comfort of user.
In addition, repeatedly defrosted by being divided into, the outdoor heat exchanger capacity of defrosting for heat relatively
Small, the condensation duty of each outdoor heat exchanger is small, and the temperature of outdoor heat exchanger is easier to rise.Therefore, even if between unit
The heat absorption short, from tracheae 32 of tracheae 32 it is few in the case where, also reliably frost can be made to dissolve, be able to suppress frost residual and cause
Heating restore when reduced performance.
Fig. 4 (a part of piping, valve etc. are not shown) is the configuration structure for indicating multiple outdoor heat exchanger 15a, 15b
Figure.As shown in figure 4, the structure that can be arranged side by side in the up-down direction using multiple outdoor heat exchanger 15a, 15b.Outdoor heat
Exchanger 15a is located at upper layer.The position of the lowest level heat-exchange tube 33a of outdoor heat exchanger 15a and the suction inlet of compressor 11
The head difference (hydraulic head difference) of 11a is H1.Outdoor heat exchanger 15b is located at lower layer.Outdoor heat exchange
The head difference of the suction inlet 11a of the position and compressor 11 of the lowest level heat-exchange tube 33b of device 15b is H2.Moreover, head difference H1
> head difference H2.
In the case where multiple outdoor heat exchanger 15a, 15b are arranged side by side in the up-down direction, control unit 100 is from outdoor
The higher outdoor heat exchanger 15a in position of lowest level heat-exchange tube 33a, 33b in heat exchanger 15a, 15b rise and successively carry out
Defrosting.
The suction inlet of the position of lowest level heat-exchange tube 33a higher outdoor heat exchanger 15a and compressor 11 as a result,
The head difference of 11a is larger, and refrigerant is easier to return to compressor 11.When implementing second of defrosting, refrigerant is easy from first
The outdoor heat exchanger 15a that refrigerant is flowed into secondary defrosting is returned, it is easier to be absorbed heat from outdoor heat exchanger 15a.Therefore, energy
It is enough to obtain the required heat of defrosting, further shorten defrosting time, shorten heating dwell time, further increases relaxing for user
Adaptive.
In addition, the outdoor heat exchanger 15b of the lower downside in position of lowest level heat-exchange tube 33b is carried out at twice
Defrosting.Therefore, the drippage of the condensed water generated in the defrosting of the outdoor heat exchanger 15a of upside is caused, the outdoor heat in downside is handed over
Freezing at parallel operation 15b again is suppressed, is able to suppress the reduction of heating performance caused by heating frequently stops.
Fig. 5 (a part of piping, valve etc. are not shown) is another configuration structure for indicating multiple outdoor heat exchanger 15a, 15b
Figure.As shown in Figure 5, or the structure that multiple outdoor heat exchanger 15a, 15b are arranged side-by-side in the lateral direction.From room
The heat-exchange tube gas side inlet 34a of outer heat-exchanger 15a to compressor 11 suction inlet 11a piping length ratio from outdoor heat
The heat-exchange tube gas side inlet 34b of exchanger 15b to compressor 11 suction inlet 11a piping length it is short.
In the case where multiple outdoor heat exchanger 15a, 15b are arranged side by side in the lateral direction, control unit 100 is from outdoor
Heat-exchange tube gas side inlet 34a, 34b in heat exchanger 15a, 15b to compressor 11 suction inlet 11a piping length compared with
Short outdoor heat exchanger 15a rises and successively defrosts.
As a result, from heat-exchange tube gas side inlet 34a to the outdoor that the piping length of the suction inlet 11a of compressor 11 is shorter
The pressure loss in the piping of heat exchanger 15a is smaller, and refrigerant is easier to return to compressor 11.It defrosts implementing second
When, refrigerant is easy the outdoor heat exchanger 15a that refrigerant is flowed into from first time defrosting and returns, it is easier to hand over from outdoor heat
Parallel operation 15a heat absorption.Therefore, heat needed for capable of obtaining defrosting, can further shorten defrosting time, when shortening heating stopping
Between, further increase the comfort of user.
According to above explanation, including compressor 11, the multiple outdoor heat exchangers being arranged in parallel relative to compressor 11
15a, 15b, outdoor expansion valve 16a, the 16b and indoor heat exchanger 22a, 22b being arranged by each outdoor heat exchanger 15a, 15b
Conditioner 1A in, comprising: in outlet and the defrosting of compressor 11 as the inflow entrance of refrigerant outdoor heat
Connecting tube 113a, 113b between connector 25a, 25b of a side of exchanger 15a, 15b, by each outdoor heat exchanger
Valve gear 130a, 130b of 15a, 15b setting；With from connecting tube 113a, 113b branch, pass through cutting for valve gear 130a, 130b
The bypass changed and be connected to connector 25a, 25b of a side of outdoor heat exchanger 15a, 15b with the suction inlet 11a of compressor 11
Circuit 17a, 17b.
According to this structure, because the defrosting object outdoor heat exchanger to defrost can be selected to carry out defrosting operating, institute
With compared with the case where multiple outdoor heat exchanger 15a, 15b once all defrost, heat needed for primary defrosting is less
?.In addition, repeatedly being defrosted by being divided into, the capacity of outdoor heat exchanger 15a, 15b of defrosting are smaller relative to heat,
The condensation duty of each outdoor heat exchanger 15a, 15b are small, and the temperature of outdoor heat exchanger 15a, 15b are easier to rise, therefore energy
It is enough reliably to dissolve frost.Further, since the capacity of outdoor heat exchanger 15a, 15b of defrosting are smaller relative to heat, therefore
Even if heat absorption will not be insufficient in heat sink hour, reliably frost can be made to dissolve.Caused by inhibiting frost to remain
Reduced performance when heating is restored can shorten defrosting time, shorten heating dwell time, improve the comfort of user.
In addition, in the present embodiment, there is control unit 100, in defrosting from above-mentioned multiple outdoor heat exchangers
The defrosting object outdoor heat exchanger to defrost is selected in 15a, 15b, selector valve device 130a, 130b will not be defrostings pair
As connector 25a, 25b and bypass circulation 17a, 17b of a side of outdoor heat exchanger 15a, 15b of outdoor heat exchanger connect
It connects.
According to this structure, control unit 100 switches over the control of valve gear 130a, 130b and carries out defrosting operating, therefore
Reliably frost can be made to dissolve, the automatic control for executing reduced performance when heating caused by inhibiting frost residual is restored, Neng Gouti
The comfort of high user.
In addition, in the present embodiment, the outlet and outdoor heat exchanger of valve gear 130a, 130b in compressor 11
First open and close valve 13a, 13b being arranged by each outdoor heat exchanger 15a, 15b is provided between 15a, 15b.In addition, valve fills
Set 130a, 130b include between first open and close valve 13a, 13b and outdoor heat exchanger 15a, 15b branch, by each room
Respectively arranged second open and close valve 14a, 14b of bypass circulation 17a, 17b of outer heat-exchanger 15a, 15b setting.
According to these structures, the opening and closing of first open and close valve 13a, 13b and the opening and closing of second open and close valve 14a, 14b can be passed through
Combination, select outdoor heat exchanger 15a, 15b for defrosting, individually defrost.Thereby, it is possible to simply to tie
Defrosting is divided into multiple progress by structure, even if will not generate heat absorption deficiency in heat sink hour, can be improved relaxing for user
Adaptive.
In addition, in the present embodiment, control unit 100 makes in defrosting and is not above-mentioned defrosting object outdoor heat exchanger
Outdoor heat exchanger 15a, 15b connection first open and close valve 13a, 13b and outdoor expansion valve 16a, 16b be in off state, make
Second open and close valve 14a, 14b connecting with outdoor heat exchanger 15a, the 15b for not being defrosting object outdoor heat exchanger is opening
State.Thereby, it is possible to defrost to be divided into multiple progress, even if will not generate heat absorption deficiency in heat sink hour, can be improved
The comfort of user.In addition, can be removed from for the first time in second of later defrosting that the heat absorption from tracheae 32 tails off
White object outdoor heat exchanger heat absorption.Thereby, it is possible to heats needed for sufficiently obtaining defrosting, therefore condensation temperature is easy to rise,
Defrosting can be quickly completed, shortens heating dwell time, improves the comfort of user.
In addition, in the present embodiment, multiple outdoor heat exchanger 15a, 15b are abreast arranged in the up-down direction, control
Position higher outdoor heat exchanger of the portion 100 processed from lowest level heat-exchange tube 33a, 33b of outdoor heat exchanger 15a, 15b
15a, 15b rise and successively defrost.Therefore, heat needed for capable of obtaining defrosting, can further shorten defrosting time, shorten
Heating dwell time further increases the comfort of user.In addition, the lower downside in position of lowest level heat-exchange tube 33b
Outdoor heat exchanger 15b defrost for the second time.Therefore, it is able to suppress in the defrosting of the outdoor heat exchanger 15a of upside
The icing again of caused, in downside the outdoor heat exchanger 15b of the drippage of the condensed water of generation, is able to suppress heating and frequently stops
The only reduction of caused heating performance.
In addition, in the present embodiment, multiple outdoor heat exchanger 15a, 15b are arranged side by side in the lateral direction, control
The piping length of suction inlet of the portion 100 from the heat-exchange tube gas side inlet of outdoor heat exchanger 15a, 15b to compressor is shorter
Outdoor heat exchanger 15a, 15b rise successively defrost.According to this structure, when implementing second of defrosting, refrigerant is easy
The outdoor heat exchanger 15a that refrigerant is flowed into from first time defrosting is returned, it is easier to be absorbed heat from outdoor heat exchanger 15a.
Therefore, heat needed for capable of obtaining defrosting, can further shorten defrosting time, shorten heating dwell time, further mention
The comfort of high user.
< second embodiment >
Fig. 6 is the figure for indicating the refrigerant circuit of conditioner 1B of second embodiment of the present invention.Such as Fig. 6 institute
Show, conditioner 1B has heat exchanger switching valve 35a, 35b as valve gear 140a, 140b, to replace above-mentioned first
Valve gear 130a, 130b of embodiment.Heat exchanger switching valve 35a, 35b can be by the one of outdoor heat exchanger 15a, 15b
Connector 25a, 25b switching of side be connected to discharge pipe 111 or bypass circulation 17a, 17b for be connected to suction line 112 in times
One.In addition, in the explanation of the second embodiment, to identical with the conditioner 1A of above-mentioned first embodiment
Structure marks identical appended drawing reference in Fig. 6, omits the description.
In conditioner 1B, defrosting carries out in two times.The control defrosting of control unit 100.Defrosting is to outdoor for the first time
Heat exchanger 15a is carried out.Control unit 100 is being judged to needing to defrost as illustrated in above-mentioned first embodiment
When operating, it is first begin to the operating that defrosts for the first time.In first time defrosting operating, control unit 100 makes outdoor expansion valve 16a, room
Interior expansion valve 21a, 21b are in an open state, and are in off state outdoor expansion valve 16b.In addition, control unit 100 is so that compression
The discharge side of machine 11 switches switching valve 12 with outdoor heat exchanger 15a, 15b mode connecting.Further, control unit 100 so that
It obtains switching valve 12 and switches heat exchanger switching valve 35a with the outdoor heat exchanger 15a mode being connected to, so that outdoor heat exchanger
15b switches heat exchanger switching valve 35b with the bypass circulation 17b mode being connected to.In this way, control unit 100 makes compressor 11, switching
Valve 12, heat exchanger switching valve 35a, outdoor heat exchanger 15a, outdoor expansion valve 16a, liquid pipe connector 18, indoor expansion valve
21a, 21b, indoor heat exchanger 22a, 22b, tracheae connector 19, switching valve 12 and compressor 11 are sequentially communicated, and are carried out outdoor
The defrosting of heat exchanger 15a.At this point, the refrigerant in outdoor heat exchanger 15b is via heat exchanger switching valve 35b, bypass pipe
117b returns to compressor 11.
When the temperature for being determined as outdoor heat exchanger 15a reaches specified value or more, control unit 100 is judged as to be removed for the first time
Frost operating is completed, and is carried out second and is defrosted.Second of defrosting carries out outdoor heat exchanger 15b.Control unit 100 is carrying out second
When secondary defrosting operates, from the state of first time defrosting, it is in an open state outdoor expansion valve 16b, makes outdoor expansion valve 16a
Closed state.In addition, control unit 100 is so that outdoor heat exchanger 15a switches heat exchange with the bypass circulation 17a mode being connected to
Device switching valve 35a, so that switching valve 12 switches heat exchanger switching valve 35b with the outdoor heat exchanger 15b mode being connected to.This
Sample, control unit 100 make compressor 11, switching valve 12, heat exchanger switching valve 35b, outdoor heat exchanger 15b, outdoor expansion valve
16b, liquid pipe connector 18, indoor expansion valve 21a, 21b, indoor heat exchanger 22a, 22b, tracheae connector 19, switching valve 12
It is sequentially communicated with compressor 11, carries out the defrosting of outdoor heat exchanger 15b.At this point, the refrigerant in outdoor heat exchanger 15a passes through
Compressor 11 is returned to by heat exchanger switching valve 35a, bypass pipe 117a.
According to these structures, the switching of heat exchanger switching valve 35a, 35b as valve gear 140a, 140b can be passed through
To select defrosting object outdoor heat exchanger.As a result, in this second embodiment, it can not only obtain and implement with above-mentioned first
The identical effect of mode, and the effect of simplified refrigerant circuit structure can be obtained.
In addition, above embodiment is only the illustration of one embodiment of the present invention, it certainly can be in purport of the invention
It is arbitrarily deformed and is applied in range.
The explanation of appended drawing reference
1A, 1B conditioner
10 outdoor units
11 compressors
11a suction inlet
12 switching valves
The first open and close valve of 13a, 13b
The second open and close valve of 14a, 14b
15a, 15b outdoor heat exchanger
16a, 16b outdoor expansion valve
17a, 17b bypass circulation
18 liquid pipe connectors
19 tracheae connectors
20a, 20b indoor unit
21a, 21b indoor expansion valve
22a, 22b indoor heat exchanger
The connector of mono- side of 25a, 25b
The connector of 26a, 26b another party
It is piped between Unit 30
31 liquid pipes
32 tracheaes
35a, 35b heat exchanger switching valve
100 control units
130a, 130b, 140a, 140b valve gear.
Claims (8)
1. a kind of conditioner comprising: compressor；Multiple outdoor heat exchanges relative to compressor parallel setting
Device；By the outdoor expansion valve of each outdoor heat exchanger setting；And indoor heat exchanger, the feature of the conditioner
It is, comprising:
The connecting tube being connect when with defrosting as the connector of a side of the outdoor heat exchanger of the inflow entrance of refrigerant
In, by the valve gear of each outdoor heat exchanger setting；With
From the connecting tube branch, connector and the institute of a side of the outdoor heat exchanger are made by the switching of the valve gear
State the bypass circulation of the suction inlet connection of compressor.
2. conditioner as described in claim 1, it is characterised in that:
Including control unit, which selects the defrosting object to defrost in defrosting from the multiple outdoor heat exchanger
Outdoor heat exchanger switches the valve gear, by be not it is described defrosting object outdoor heat exchanger outdoor heat exchanger institute
The connector for stating a side is connect with the bypass circulation.
3. conditioner as claimed in claim 2, it is characterised in that:
The valve gear includes: to hand between the outlet and the outdoor heat exchanger of the compressor by each outdoor heat
First open and close valve of parallel operation setting；And between first open and close valve and the outdoor heat exchanger branch press each institute
State respectively arranged second open and close valve in the bypass circulation of outdoor heat exchanger setting.
4. conditioner as claimed in claim 3, it is characterised in that:
The control unit makes the institute connecting with the outdoor heat exchanger for not being the defrosting object outdoor heat exchanger in defrosting
Stating the first open and close valve and the outdoor expansion valve becomes closed state, makes and be not the room of the defrosting object outdoor heat exchanger
Second open and close valve of outer heat-exchanger connection becomes opening state.
5. conditioner as claimed in claim 2, it is characterised in that:
The valve gear includes to connect the outlet side of the connector of a side of the outdoor heat exchanger and the compressor
It connects or heat exchanger switching valve that the mode that connect with the bypass circulation switches over.
6. conditioner as claimed in claim 5, it is characterised in that:
The control unit switches the heat exchange switching valve in defrosting, will not be the room of the defrosting object outdoor heat exchanger
The connector of one side of outer heat-exchanger is connect with the bypass circulation.
7. conditioner as claimed in claim 2, it is characterised in that:
The multiple outdoor heat exchanger is arranged side by side in the up-down direction, the control unit from the outdoor heat exchanger most
The higher outdoor heat exchanger in the position of lower layer's heat-exchange tube rises and successively defrosts.
8. conditioner as claimed in claim 2, it is characterised in that:
The multiple outdoor heat exchanger is arranged side by side in the lateral direction, heat of the control unit from the outdoor heat exchanger
Exchange pipe gas side inlet to the compressor suction inlet the shorter outdoor heat exchanger of piping length rise successively into
Row defrosting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-003452 | 2016-01-12 | ||
| JP2016003452A JP6671009B2 (en) | 2016-01-12 | 2016-01-12 | Air conditioner |
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| CN106958889B true CN106958889B (en) | 2019-08-20 |
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| CN107388665B (en) * | 2017-08-22 | 2021-02-23 | 广东美的暖通设备有限公司 | Heat pump assembly, defrost control method, and storage medium |
| CN107575953A (en) * | 2017-08-29 | 2018-01-12 | 珠海格力电器股份有限公司 | A kind of control method of air-conditioner outdoor unit, air conditioner and air-conditioner outdoor unit |
| CN108224837A (en) * | 2017-12-19 | 2018-06-29 | 青岛海尔空调电子有限公司 | Air-conditioner system |
| JP6881383B2 (en) * | 2018-04-05 | 2021-06-02 | 株式会社デンソー | Battery cooling device |
| CN110736205B (en) * | 2019-09-25 | 2022-01-21 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110762757B (en) * | 2019-11-06 | 2022-03-29 | 青岛海尔空调电子有限公司 | Air conditioning system and control method thereof |
| JP7262431B2 (en) * | 2020-09-29 | 2023-04-21 | ダイキン工業株式会社 | Heat capacity estimation system, refrigerant cycle device, and heat capacity estimation method |
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| JP2010203673A (en) * | 2009-03-03 | 2010-09-16 | Daikin Ind Ltd | Air conditioner |
| CN102348940A (en) * | 2009-03-19 | 2012-02-08 | 大金工业株式会社 | Air conditioning device |
| CN103201566A (en) * | 2010-11-15 | 2013-07-10 | 大金工业株式会社 | Air conditioner |
| WO2015140951A1 (en) * | 2014-03-19 | 2015-09-24 | 三菱電機株式会社 | Air conditioner |
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|---|---|---|---|---|
| CN1517632A (en) * | 2003-01-13 | 2004-08-04 | Lg������ʽ���� | Duplex air governor with defrost equipment |
| JP2010203673A (en) * | 2009-03-03 | 2010-09-16 | Daikin Ind Ltd | Air conditioner |
| CN102348940A (en) * | 2009-03-19 | 2012-02-08 | 大金工业株式会社 | Air conditioning device |
| CN103201566A (en) * | 2010-11-15 | 2013-07-10 | 大金工业株式会社 | Air conditioner |
| WO2015140951A1 (en) * | 2014-03-19 | 2015-09-24 | 三菱電機株式会社 | Air conditioner |
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| JP2017125628A (en) | 2017-07-20 |
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