CN107084561A - Air conditioner and its defrosting control method - Google Patents

Air conditioner and its defrosting control method Download PDF

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Publication number
CN107084561A
CN107084561A CN201710468524.7A CN201710468524A CN107084561A CN 107084561 A CN107084561 A CN 107084561A CN 201710468524 A CN201710468524 A CN 201710468524A CN 107084561 A CN107084561 A CN 107084561A
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CN
China
Prior art keywords
stream
air conditioner
condenser
switch
defrosting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710468524.7A
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Chinese (zh)
Inventor
陈城彬
张先雄
黄彩凤
赵楚燕
周竞强
罗结仪
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.)
TCL Air Conditioner Zhongshan Co Ltd
Original Assignee
TCL Air Conditioner Zhongshan Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TCL Air Conditioner Zhongshan Co Ltd filed Critical TCL Air Conditioner Zhongshan Co Ltd
Priority to CN201710468524.7A priority Critical patent/CN107084561A/en
Publication of CN107084561A publication Critical patent/CN107084561A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02Defrosting cycles
    • F25B47/022Defrosting cycles hot gas defrosting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof

Abstract

The present invention discloses a kind of air conditioner, including compressor, four-way valve, evaporator, condenser, stream switch, and condenser is provided with a plurality of condenser stream, in addition to:Controller, defrost switch, magnetic valve;The outlet of defrost switch switches stream provided with a plurality of defrost;One end of bypass channel is connected at compressor outlet, magnetic valve is deployed on bypass channel and at compressor outlet, defrost switch entrance is connected with the bypass channel other end and each defrost switch stream is corresponding respectively is connected with a condenser stream;During into defrosting mode, four-way valve is kept to turn to constant;The condenser stream that control stream switch is closed at position to be defrosted;Open the corresponding defrost switching stream of defrost switch and magnetic valve.Invention additionally discloses a kind of defrosting control method of air conditioner.The present invention is sustainable to indoor heating during air conditioner defrosting, improves the comfortableness that user uses.

Description

Air conditioner and its defrosting control method
Technical field
The present invention relates to air conditioner technical field, more particularly to a kind of air conditioner and its defrosting control method.
Background technology
At present, air conditioner generally using conversion heating mode and refrigeration mode by the way of defrosted, and heating mode and The conversion of refrigeration mode, need to change the steering of four-way valve, to change the flow direction of refrigerant, so as to reach the mesh of condenser defrost 's.But at low ambient temperatures, air conditioner may at regular intervals (more than ten minutes) carry out once defrosting handle so that room Interior heating does not stop to be interrupted, while indoor temperature also can constantly decline and not reach the temperature value of user's setting, and then reduces use The comfortableness that family is used.
The content of the invention
It is a primary object of the present invention to provide a kind of air conditioner and its defrosting control method, it is intended to which how solution is realized Continue under defrosting mode to indoor heating, to improve the technical problem for the comfortableness that user uses.
To achieve the above object, a kind of air conditioner that the present invention is provided, including form the compressor, four-way valve, steaming of loop Device, condenser, stream switch are sent out, the condenser is provided with a plurality of condenser stream, and the air conditioner also includes:Controller, Defrost switch, magnetic valve;The defrost switch outlet switches stream provided with a plurality of defrost;Connected at the compressor outlet One end of bypass channel, the magnetic valve is deployed on the bypass channel and at the compressor outlet, describedization White switch entrance is connected with the bypass channel other end and each defrost switch stream is corresponding respectively condenses with one Device stream is connected;
The controller is used for:When the air conditioner enters defrosting mode, keep the four-way valve works as front steering not Become;The condenser stream for controlling the stream switch to close at position to be defrosted;The defrost switch is controlled to open correspondence Defrost switching stream, and open the magnetic valve.
Preferably, the controller is additionally operable to:
When the air conditioner exits defrosting mode, keep the four-way valve when front steering is constant;Control the stream Switch opens the condenser stream closed during defrosting;The defrost for controlling the defrost switch to be opened when closing defrosting is cut Change of current road, and close the magnetic valve.
Preferably, the controller is additionally operable to:
When the air conditioner is in heating mode, the stream switch is controlled to keep all condensations of the condenser Device stream is opening, and keeps all defrosts of the magnetic valve and the defrost switch to switch stream to close shape State.
Preferably, the air conditioner also includes gas-liquid separator, and the suction port of compressor is exported with the gas-liquid separator Connection, the gas-liquid separator entrance are connected with the four-way valve one outlet.
To achieve the above object, the present invention also provides a kind of defrosting control method using above-mentioned air conditioner, the air-conditioning The defrosting control method of device comprises the following steps:
Whether air conditioner currently meets defrosting condition described in the monitoring control devices;
When the air conditioner currently meets defrosting condition and enters defrosting mode, keep the four-way valve works as front steering It is constant;
The condenser stream for controlling the stream switch to close at position to be defrosted, for cut off the condenser stream with Passage between the four-way valve;
Control the defrost switch to open corresponding defrost switching stream, and open the magnetic valve, for connection institute The passage at compressor outlet and the position to be defrosted between condenser stream is stated to be defrosted.
Preferably, the defrosting control method of the air conditioner also includes:
When the air conditioner exits defrosting mode, the controller keep the four-way valve when front steering is constant;Control Make the stream switch and open the condenser stream closed during defrosting;The defrost switch is controlled to be opened when closing defrosting The defrost switching stream opened, and close the magnetic valve.
Preferably, the defrosting control method of the air conditioner also includes:
When the air conditioner is in heating mode, the controller controls the stream switch to keep the condenser All condenser streams be opening, and keep all defrosts switching stream of the magnetic valve and the defrost switch For closed mode.
Preferably, outer coil pipe is respectively equipped with each bar condenser stream of the condenser, described in the monitoring control devices Whether air conditioner, which currently meets defrosting condition, includes:
The whether continuous preset duration of the temperature of outer coil pipe described in the monitoring control devices is less than the first temperature value;
If, it is determined that the air conditioner currently meets defrosting condition.
Preferably, inner coil pipe is provided with the evaporator, the air conditioner also includes indoor fan, in controller prison Survey before whether the air conditioner currently meet defrosting condition, the defrosting control method of the air conditioner also includes:
When air conditioner start enters heating mode, it is described cold that the controller controls the stream switch to open All condenser streams of condenser, and close all defrosts switching stream of the magnetic valve and the defrost switch;
Judge whether the temperature of presently described inner coil pipe is more than second temperature value;
If so, then controlling the indoor fan to be run by wind speed setting, otherwise, the operation wind of the indoor fan is reduced Speed.
Preferably, the defrosting control method of the air conditioner also includes:
When the air conditioner enters defrosting mode, whether the temperature of outer coil pipe described in the monitoring control devices is more than the 3rd Temperature value;
If so, then the controller controls the air conditioner to exit defrosting mode.
The air conditioner of the present invention includes compressor, four-way valve, evaporator, condenser, stream switch, and condenser is provided with more Bar condenser stream, in addition to controller, defrost switch, magnetic valve;Defrost switch is provided with a plurality of with condenser stream phase Corresponding defrost switches stream.Air conditioner of the present invention need not change the steering of four-way valve in defrosting processing procedure, pass through control The condenser stream that stream switch is closed at position to be defrosted, opens the corresponding defrost switching stream of defrost switch and electromagnetism Valve, is divided into two-way by the refrigerant of HTHP:Evaporator is sent to all the way to continue to indoor carry out heat supply, is cut all the way through defrost Parallel operation enters progress defrosting processing in condenser stream to be defrosted, so as to ensure the heating performance of air conditioner, and continues Indoor temperature is improved, and then improves the comfortableness that user uses.
Brief description of the drawings
Fig. 1 is the structural representation of the air conditioner of prior art;
Fig. 2 is the structural representation of the embodiment of air conditioner one of the present invention;
Fig. 3 is the partial structural diagram of defrost switch, stream switch and condenser in Fig. 2;
Fig. 4 is the refrigerant flow direction schematic diagram of an air conditioner of the present invention embodiment in a heating mode;
Fig. 5 is the refrigerant flow direction schematic diagram of an air conditioner of the present invention embodiment in defrost mode;
Fig. 6 is the schematic flow sheet of the embodiment of defrosting control method one of air conditioner of the present invention;
Fig. 7 is the schematic flow sheet of the preferred embodiment of defrosting control method one of air conditioner of the present invention.
Drawing reference numeral explanation:
Label Title Label Title
1 Compressor 2 Four-way valve
3 Evaporator 4 Condenser
5 Stream switch 6 Defrost switch
7 Magnetic valve 8 Gas-liquid separator
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
Reference picture 1, Fig. 1 is the structural representation of the air conditioner of prior art.
As shown in Figure 1, existing air conditioner is mainly cut including compressor 1, four-way valve 2, evaporator 3, condenser 4, stream Parallel operation 5.It is in existing air conditioner under heating mode, refrigerant exports outflow by compressor 1, by four-way valve 2, is sent to steaming The heat release of device 3 is sent out, then is flowed to after the heat absorption of condenser 4, four-way valve 2 is arrived via stream switch 5, compressor 1 is eventually passed back to, so that shape Into one constantly circulate heat route.It is when frosting occurs in condenser 4, it usually needs shut down defrosting processing, i.e., interior to send outside Wind turbine is out-of-blast, and heating mode is switched to refrigeration mode by air-conditioning system, four-way valve 2 is then changed in cooling mode, together When room in air supply motor stop, outdoor air supply motor starts, and condenser 4 is defrosted, until defrosting completion.Then room is stopped Outer air supply motor, the cold air-conditioning system transformation of ownership is heating mode, inside and outside air supply motor restarting air-supply.Although this mode can Effectively defrosting, but in the case of external environment is colder, air conditioner may will carry out once defrosting processing every more than ten minutes so that Indoor heating does not stop to be interrupted, while indoor temperature does not reach the temperature value of user's setting yet, and then reduces the use body of user Test.
Reference picture 2, Fig. 2 is the structural representation of the embodiment of air conditioner one of the present invention.
In the present embodiment, air conditioner includes compressor 1, four-way valve 2, evaporator 3, condenser 4, stream switch 5, change White switch 6, magnetic valve 7, gas-liquid separator 8, controller (not shown).Controller is used for contracting machine 1, four-way valve to air conditioner 2nd, the relevant apparatus such as stream switch 5, defrost switch 6, magnetic valve 7 is controlled.Understand referring to Figures 1 and 2, the present invention exists Increase sets defrost switch 6, magnetic valve 7, gas-liquid separator 8 on existing air conditioner structure, and accordingly increases the stream being connected Paths.
In the present embodiment, refrigerant is also known as refrigeration working medium, refrigerant, medium etc., is the working media of kind of refrigeration cycle, utilizes Heat is transmitted in the phase transformation of refrigerant, is absorbed heat when both refrigerant is vaporized in evaporator, heat release when condensing within the condenser.Currently Can serve as the material of refrigerant has kind more than 80, and the refrigerant that air conditioner is typically used is freon.The characteristic of freon is:By When gaseous state is changed into liquid, substantial amounts of heat is discharged, and when being changed into gaseous state by liquid, substantial amounts of heat can be absorbed.Air conditioner exists Under refrigeration or heating mode, after refrigerant is extracted from low-pressure area and is compressed through compressor 1, higher-pressure region cooling is sent to, And refrigerant also becomes liquid from gaseous state, then via low-pressure area heat absorption evaporation, refrigerant is changed into gaseous state from liquid again, thus may be used It is to play compressible drive in air conditioning coolant loop to know compressor 1.Wherein, low-pressure area and higher-pressure region are with respect to air conditioner Depending on working condition, i.e., in cooling mode, condenser 4 is the high-tension apparatus of system, and evaporator 3 is low-voltage equipment.Heating Under pattern, condenser 4 is the low-voltage equipment of system, and evaporator 3 is high-tension apparatus.
Evaporator 3 is deployed in indoor set, and using gaseous state high temperature refrigerant, easily cooling condenses under high pressure, is changed into liquid simultaneously Amount of heat is distributed, reaches and heats purpose.Condenser 4 is deployed in outdoor unit, is easily steamed under low pressure using liquid low temperature refrigerant Hair, is changed into steam and absorbs amount of heat, reach refrigeration purpose.
Four-way valve 2 is the control valve with four mouths, and its usual main slide valve is in an intermediate position and connects with one of mouth Logical, then remaining two mouths are connected.By changing the connection of two valve ports, change refrigerant between condenser 4 and evaporator 3 Flow direction, so as to become to heat circulation by kind of refrigeration cycle, i.e., it is outdoor blow be that cold wind, indoor set blow is hot blast, or room Blow outside be that hot blast, indoor set blow is cold wind.The main slide valve (first mouth) of such as four-way valve is connected with the 4th mouth, and second Individual mouth and the 3rd mouth are connected, and when piston two ends have pressure difference, change the steering of four-way valve, i.e. piston and main slide valve is moved to right, Become main slide valve (first mouth) to connect with second mouth, the 3rd mouth and the 4th mouth are connected.
Reference picture 3, Fig. 3 is the partial structural diagram of defrost switch, stream switch and condenser in Fig. 2.
In the present embodiment, condenser 4 be provided with a plurality of condenser stream, quantity at least two, different in size, shape size is not Limit, is configured with specific reference to being actually needed.Reference picture 3, preferably three condensations in parallel and separate successively from top to bottom The condenser stream 41 of device stream, i.e., first, Article 2 condenser stream 42, Article 3 condenser stream 43, and in condenser One end of stream is provided with total stream 40, and the entrance exported respectively with three condenser streams of total stream 40 is connected, total stream Entrance connected with evaporator 3.The outlet of condenser stream connection corresponding with stream switch 5, defrost switch 6 respectively.Stream Road switch 5 and first condenser stream 41, Article 2 condenser stream 42, the outlet of Article 3 condenser stream 43 are distinguished Be connected, and switch be set in each connection, to control respectively between condenser stream and four-way valve 2 connection of passage or Disconnect.
The outlet of defrost switch 6 switches stream provided with a plurality of defrost, and quantity is consistent with condenser stream quantity, and length is not One, shape size is not limited, and can be specifically configured according to actual needs.The exit of compressor 1 connects one end of bypass channel, The entrance of defrost switch 6 and the bypass channel other end are connected and each defrost switch stream be corresponding respectively and a condenser Stream is connected.Reference picture 3, preferably from top to bottom defrost switch stream in parallel and separate, i.e., first defrost successively Switch stream 61, Article 2 defrost switch stream 62, Article 3 defrost switch stream 63.First defrost switch stream Road 61 is connected with first condenser stream 41, and Article 2 defrost switch stream 62 is connected with Article 2 condenser stream 42, Article 3 defrost switch stream 63 is connected with Article 3 condenser stream 43.
In the present embodiment, when ambient temperature is relatively low, user is using air conditioner and uses heating mode to feed to room Interior heating, when now the condenser 4 of air conditioner external absorbs heat, the environment temperature of condenser 4 can be dropped to will also than ambient temperature It is low, such as less than 0 DEG C, while the moisture of surrounding will soon condense into frost, and then cause the copper pipe and fin knot on condenser 4 Frost.If carrying out defrosting processing not in time, passage between fin can be blocked, increases air flow resistance;Increase heat exchanger thermal resistance, change Heat energy power declines;Evaporating temperature declines, Energy Efficiency Ratio reduction, causes heating performance low, influences the use of air conditioner, seriously very It is not normally functioning to air-conditioning is made.Therefore, air conditioner needs to set defrosting function, specifically, when air conditioner enters defrosting mode When, it is constant that what controller control four-way valve 2 was kept works as front steering so that flow direction of the refrigerant under current heating mode is not Become, entered while the gaseous refrigerant that compressor 1 is sent out may proceed through four-way valve 2 in evaporator 3, so as to ensure refrigeration Circulation of the agent in evaporator 3.
In the present embodiment, stream switch 5 is in the case where keeping being all turned on, and controller control stream switch 5 is individually closed Condenser stream at position to be defrosted, such as when the condenser stream at position of defrosting is first condenser stream 41, Stream switch 5 is controlled to close the valve port of first condenser stream 41, to cut off first condenser stream 41 and four-way Passage between valve 2 so that refrigerant can not pass through stream switch 5 by first condenser stream 41 and flow to four-way valve 2.
In the present embodiment, defrost switch 6 is in the case of Close All, and controller control defrost switch 6 is individually opened Corresponding defrost switching stream is opened, while opens solenoid valve 7, makes part of refrigerant be flowed by defrost switch 6 from compressor 1 To heat release defrosting is carried out into first condenser stream 41, while another part refrigerant still maintains direction current flow to send out It is sent in evaporator 3 and carries out heat release, so as to continues to indoor transmission hot blast.For example, there is frosting in first condenser stream 41 When phenomenon need to carry out defrosting processing, do not change four-way valve 2 and work as front steering, control stream switch 5 closes first condenser stream Road 41 is to disconnect the connection between four-way valve 2.The switch of controller control defrost simultaneously 6 opens first defrost switching stream Road 61, and opens solenoid valve 7, to connect the passage between compressor 1 and first condenser stream 41.Further, control Device control stream switch 5 processed, defrost switch 6, the sequencing of magnetic valve 7 are not limited, and can first be closed stream switch 5 and be waited to remove The condenser stream of frost, then the white switch 6 corresponding defrost switching stream that becomes civilized, are finally then turned on magnetic valve 7, can also control Three Simultaneous Switchings etc., are configured according to actual needs.
In order to be further understood that the present invention, reference picture 4 and Fig. 5 are illustrated, and Fig. 4 is that air conditioner of the present invention is heating mould The refrigerant flow direction schematic diagram of the next embodiment of formula, Fig. 5 is the refrigerant of an air conditioner of the present invention embodiment in defrost mode Flow to schematic diagram.
In the present embodiment, air conditioner is run and entered under heating mode in start, and defrost switch 6 and magnetic valve 7 are kept Closed mode, stream switch 5 are to be all turned on.The flow direction of refrigerant as shown in Figure 4:Compressor 1 → four-way valve, 2 → evaporator 3 → condenser 4 (first condenser stream 41, second day condenser stream 42, Article 3 condenser stream 43) → stream is cut 8 → compressor of parallel operation 4 → four-way valve, 2 → gas-liquid separator 1.Refrigerant circulates in each structure of air conditioner, and one of formation is not Disconnected circulation heats route.
In another embodiment of the present invention, when the frosting imagination occurs in Article 3 condenser stream 43, air conditioner enters defrosting Pattern, keep four-way valve 2 when front steering is constant, controller control stream switch 5 closes Article 3 condenser stream 43, control Inhibition and generation frost switch 6 opens corresponding Article 3 defrost switching stream 63, and opens solenoid valve 7.As shown in Figure 5 refrigerant except During frost, it is divided into two-way flowing, one:(the first condenser stream of 3 → condenser of compressor 1 → four-way valve, 2 → evaporator 4 Road 41, second day condenser stream 42) → 8 → compressor of stream switch 5 → four-way valve, 2 → gas-liquid separator 1;Secondly:Pressure Contracting machine 1 → magnetic valve, 7 → defrost switch 6 (Article 3 defrost switch stream 63) (Article 3 condenser stream of → condenser 4 43) → condenser 4 (first condenser stream 41, second day condenser stream 42) → stream switch 5 → four-way valve, 2 → gas 8 → compressor of liquid/gas separator 1.Refrigerant flows to Article 3 condenser stream 43 to be defrosted by defrost switch 6 and put Thermalization frost, switchs to liquid, and flow to the first condenser stream 41, second for being not required to defrosting after now refrigerant heat release by gaseous state Its condenser stream 42.When liquid refrigerant flows to first condenser stream 41, second day condenser stream 42 and original system Cryogen flow direction is consistent, by stream switch 5, four-way valve 2, gas-liquid separator 8, is eventually returned to compressor 1, one is formed with this Compound circulation route.Air conditioner, due to refrigerant point two-way flowing, is sent to evaporator 3 and continued all the way during defrosting To indoor carry out heat supply, progress defrosting processing in condenser stream to be defrosted is entered through defrost switch 6 all the way, so as to protect The heating performance of air conditioner, and constantly improve indoor temperature are demonstrate,proved, and then improves the comfortableness that user uses.
In the embodiment of the present invention, during whole defrosting, four-way valve 2 is turned to without change.When air conditioner exits defrosting During pattern, controller also controls the condenser stream that stream switch 5 is closed when opening defrosting;Control defrost switch 6 is closed The defrost switching stream opened during defrosting is closed, and closes magnetic valve 7.For example after first defrosting of condenser stream 41 is finished, Controller control stream switch 5 opens first condenser stream 41, is allowed to being connected between four-way valve 2.Same time control Device processed control defrost switch 6 closes first defrost switching stream 61, and closes magnetic valve 7, to disconnect compressor 1 and the Passage between one condenser stream 41, thus refrigerant first condenser stream can not be sent to from compressor 1 in 41.
Specifically, in the embodiment of the present invention, when air conditioner is in heating mode, control stream switch 5 keeps condensation All condenser streams of device 4 are opening, and keep all defrosts of magnetic valve 7 and defrost switch 6 to switch stream being Closed mode.It is to maintain off-state between compressor 1, defrost switch 6 and condenser stream, refrigerant has and only There is a flow direction, evaporator 3 is sent to from compressor 1 by four-way valve 2.
Further, in the embodiment of the present invention, air conditioner also includes gas-liquid separator 8, installed in the porch of compressor 1, And be connected with the outlet of four-way valve 2 one, for gas-liquid separation, and unnecessary coolant liquid is temporarily stored, so as to prevent compression The air inlet inspiration liquid refrigerant of machine 1 produces liquid hazards compressor 1, extends the service life of compressor 1.Gas-liquid separator 8 The isolating construction of use is a lot, and its separation method has gravitational settling, baffling separation, centrifugal force separate, silk screen separation, ultrafiltration point From, filler separation etc., it is configured with specific reference to being actually needed.
Further, based on the air conditioner in the above embodiment of the present invention, the present embodiment also provides a kind of removing for air conditioner White control method.
Reference picture 6, Fig. 6 is the schematic flow sheet of the embodiment of defrosting control method one of air conditioner of the present invention.
In the present embodiment, the defrosting control method of air conditioner comprises the following steps:
Whether S10 monitoring control devices air conditioner currently meets defrosting condition;
In the present embodiment, in a heating mode, machine is normally run air conditioner, while the current air conditioner of monitoring control devices Humidity, temperature, air pressure, operation duration, running status etc., are configured with specific reference to being actually needed.Preferably, air conditioner is monitored Temperature, operation duration and running status, to judge current air conditioner whether need carry out defrosting processing.
S20 keep four-way valve 2 when front steering it is constant;
In the present embodiment, into defrosting mode, the steering of controller control four-way valve 2 is constant so that refrigerant is current Flow direction do not change.The gaseous refrigerant that compressor 1 is sent out may proceed through four-way valve 2 and enter evaporator 3 In, so as to ensure circulation of the refrigerant in evaporator 3.
The condenser stream that S30 control streams switch 5 is closed at position to be defrosted;
In the present embodiment, stream switch 5 is all turned on, into defrosting mode, and controller says control stream switching Condenser stream at the condenser stream that device 5 is individually closed at position to be defrosted, such as position to be defrosted is first condensation During device stream 41, control stream switch 5 closes the valve port of first condenser stream 41, to cut off first condenser stream Passage between road 41 and four-way valve 2 so that refrigerant can not be flowed to by first condenser stream 41 by stream switch 5 To four-way valve 2.
S40 control defrosts switch 6 opens corresponding defrost switching stream, and opens solenoid valve 7.
In the present embodiment, defrost switch 6 is in Close All, into defrosting mode, controller control defrost switching Device 6 individually opens corresponding defrost switching stream 61, while opens solenoid valve 7, makes part of refrigerant pass through defrost switch 6 Flowed to from compressor 1 into first condenser stream 41 and carry out heat release defrosting, while another part refrigerant still maintains to work as Preceding flow direction, which is sent in evaporator 3, carries out heat release, so as to continue to indoor transmission hot blast.
Further alternative, in the present embodiment, when air conditioner exits defrosting mode, controller is kept for working as four-way valve 2 Front steering is constant;Control stream switch 5 opens the condenser stream closed during defrosting;Control defrost switch 6, which is closed, to be removed The defrost switching stream opened when white, and close magnetic valve 7.
For example after first defrosting of condenser stream 41 is finished, controller control stream switch 5 opens first condensation Device stream 41, is allowed to being connected between four-way valve 2.The switch of controller control defrost simultaneously 6 is closed first defrost and cut Change of current road 61, and magnetic valve 7 is closed, to disconnect the passage between compressor 1 and first condenser stream 41, so as to freeze Agent can not be sent in first condenser stream 41 from compressor 1.
Further alternative, the defrosting control method of air conditioner also includes:When air conditioner is in heating mode, controlling stream Road switch 5 keeps all condenser streams of condenser 4 to be opening, and keeps the institute of magnetic valve 7 and defrost switch 6 It is closed mode to have defrost to switch stream.Disconnection shape is to maintain between compressor 1, defrost switch 6 and condenser stream State, refrigerant has and only one of which flow direction, and evaporator 3 is sent to from compressor 1 by four-way valve 2.
It is further alternative, outer coil pipe is respectively equipped with each bar condenser stream of condenser 4, condenser 4 is preferably provided with 3 Bar condenser stream, every condenser stream is used for the temperature for detecting its outer coil pipe, the temperature of outer coil pipe provided with single external disk pipe Spend in refrigeration mode can as prevent overheat foundation, and in heating mode can as automatic defrosting foundation.Outer coil pipe Deployed position, shape, specification etc. are configured with specific reference to being actually needed.Specifically, when monitoring control devices to the temperature of outer coil pipe When spending continuous preset duration less than the first temperature value, controller determines to meet defrosting condition, and performs defrosting processing.Read duration It is preferably real-time with temperature value, i.e., every point of controller reading numerical values per second and judged, find that frosting is gone forward side by side to the very first time Row defrosting is handled.Specifically, preset duration can be set to a fixed value or value range, such as 5 minutes, 10 minutes or 6~8 minutes Deng the first temperature value can be set to a fixed value or value range, such as between 5 DEG C, 10 DEG C or 15~20 DEG C, with specific reference to reality Need to be configured.
It is further alternative, in the present embodiment, inner coil pipe is provided with evaporator, air conditioner also includes indoor fan.In control Whether device monitoring air conditioner processed is currently met before defrosting condition, and air conditioner start enters heating mode, controller control stream Switch 5 keeps all condenser streams of condenser 4 to be opening, and keeps all of magnetic valve 7 and defrost switch 6 Defrost switching stream is closed mode.Off-state is to maintain between compressor 1, defrost switch 6 and condenser stream , refrigerant has and only one of which flow direction, and evaporator 3 is sent to from compressor 1 by four-way valve 2.In monitoring control devices Whether the temperature of coil pipe is more than second temperature value, and performs following operate:When the temperature of inner coil pipe is more than second temperature value, control Device control indoor fan processed is run by wind speed setting;When the temperature of inner coil pipe is not more than second temperature value, controller control room Inner blower reduces operating air velocity.Wherein the deployed position of inner coil pipe, shape, specification etc. are configured with specific reference to being actually needed, Second temperature value, operating air velocity can be also configured according to experimental data etc..
It is further alternative, in the present embodiment, when air conditioner enters defrosting mode, the temperature of the outer coil pipe of monitoring control devices Whether the 3rd temperature value is more than, its 3rd temperature value is configured according to actual needs as first, second temperature value.Typically 3rd temperature value is higher than the first temperature value, so as to judge that outer coil pipe heating reaches defrost purpose.When the temperature of outer coil pipe is more than the During three temperature values, controller control air conditioner exits defrosting mode.
The present invention need not change the steering of four-way valve in defrosting processing procedure, and be treated by controlling stream switch to close Condenser stream at defrosting position, while the corresponding defrost switching stream of defrost switch and magnetic valve are opened, high temperature is high The refrigerant of pressure is divided into two-way, and evaporator is sent to all the way and is continued to indoor carry out heat supply, is entered all the way through defrost switch Defrosting processing is carried out in condenser stream to be defrosted, so that ensure the heating performance of air conditioner, and constantly improve Indoor Temperature Degree, and then improve the comfortableness that user uses.
Reference picture 7, Fig. 7 is the schematic flow sheet of the preferred embodiment of defrosting control method one of air conditioner of the present invention.
Further, in order to aid in understanding the defrosting control method of air conditioner of the present invention, the defrosting of air conditioner is provided herein The preferred embodiment of control method one, the defrosting control method of air conditioner includes:
1st, start operation;
In the present embodiment, air-conditioning remote control control air conditioner start operation is preferably used.Air-conditioning remote control is pressed including start Key, temperature up-regulation button, temperature lower button etc..
2nd, whether heating mode is entered;If being to continue with, if it is not, jumping to the 12nd step;
After air conditioner is opened, selection refrigeration mode or heating mode preferably enter heating mode, while can also be according to interior External environment, is configured using air-conditioning remote control to air conditioner, such as temperature, wind speed, wind direction, timing etc..
3rd, compressor 1 is opened, outer blower fan is opened, opens four-way valve 2, opens stream switch 5, and keeps defrost switch 6 and the closed mode of magnetic valve 7;
Into heating mode, controller opens compressor 1, to compressible drive refrigerant.The stream of refrigerant in air conditioner To for 2 → gas-liquid separator of compressor 1 → four-way valve, 2 → evaporator, 3 → condenser, 4 → stream, 5 → four-way valve of switch 8 → pressure Contracting machine 1.
4th, judge whether the temperature of current inner coil pipe is more than second temperature value;If being to continue with, if it is not, jumping to the 13rd step;
Inner coil pipe is provided with evaporator, the judgement of the temperature of inner coil pipe can be configured according to actual needs.Detection judges The temperature of inner coil pipe, can play anti-overtemperature protection when heating.
5th, control indoor fan is run by wind speed setting;
Indoor fan operation is opened, when the temperature of inner coil pipe reaches second temperature value, inner blower is run by wind speed setting. Such as second temperature value is 35 DEG C, and inner blower is run by the wind speed of middling speed, can be specifically configured according to actual needs.
6th, the whether continuous preset duration of temperature for monitoring outer coil pipe is less than the first temperature value;If being to continue with, if it is not, jumping to 6th step continues to monitor;
The temperature of outer coil pipe can be as the foundation for preventing from overheating in refrigeration mode, and can be used as in heating mode automatic The foundation of defrosting.
7th, into defrosting mode;
For example, when the temperature of outer coil pipe is less than -2 DEG C and continuous 3 minutes, controller judges that meeting current defrosting condition goes forward side by side Enter defrosting mode.
8th, keep four-way valve 2 when front steering is constant, opens solenoid valve 7, control stream switch 5 closes certain to be defrosted One condenser stream, control defrost switch 6 opens the defrost switching stream of correspondence defrosting;
The flow direction of refrigerant is divided into two-way in air conditioner, by taking the defrosting of Article 3 condenser stream 43 as an example, one:Compressor 1 → four-way valve, 2 → evaporator, 3 → condenser 4 (first condenser stream 41, second day condenser stream 42) → stream switches 8 → compressor of device 5 → four-way valve, 2 → gas-liquid separator 1;Secondly:(the Article 3 of compressor 1 → magnetic valve, 7 → defrost switch 6 Defrost switch stream 63) → condenser 4 (Article 3 condenser stream 43) → condenser 4 (first article of condenser stream 41, Two days condenser streams 42) → 8 → compressor of stream switch 5 → four-way valve, 2 → gas-liquid separator 1.Refrigerant is transmitted all the way Continue to evaporator 3 to indoor carry out heat supply, enter removed in condenser stream to be defrosted through defrost switch 6 all the way Frost processing.
Whether the temperature for the 9th, monitoring outer coil pipe is more than the 3rd temperature value;If continuing, continue to monitor if it is not, jumping to the 9th step;
General 3rd temperature value is higher than the first temperature value, so as to judge that outer coil pipe heating reaches defrost purpose.
10th, defrosting mode is exited;
When the temperature of outer coil pipe is more than three temperature values, thus controller can judge that defrost is finished, and exit defrosting mould Formula.
11st, keep four-way valve 2 when front steering is constant, close magnetic valve 7, close the change of the correspondence defrosting of defrost switch 6 White switching stream, recovers to open a certain bar condenser stream of stream switch 5, and jump to the outer coil pipe of the 6th step continuation monitoring Temperature;
12nd, into refrigeration mode;
It is opposite with refrigerant flow direction under heating mode under refrigeration mode.
13rd, control indoor fan reduction operating air velocity, and jump to the 4th step.
For example when inner coil pipe temperature is less than 35 DEG C of second temperature value, inner blower, specifically can root by the wind speed operation of dead slow speed It is configured according to being actually needed.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills Art field, is included within the scope of the present invention.

Claims (10)

1. a kind of air conditioner, including compressor, four-way valve, evaporator, condenser, the stream switch of loop are formed, it is described cold Condenser is provided with a plurality of condenser stream, it is characterised in that the air conditioner also includes:Controller, defrost switch, magnetic valve; The defrost switch outlet switches stream provided with a plurality of defrost;One end of bypass channel is connected at the compressor outlet, The magnetic valve is deployed on the bypass channel and at the compressor outlet, the defrost switch entrance with it is described The bypass channel other end is connected and each defrost switch stream corresponds to be connected with a condenser stream respectively;
The controller is used for:When the air conditioner enters defrosting mode, keep the four-way valve when front steering is constant;Control Make the condenser stream that the stream switch is closed at position to be defrosted;The defrost switch is controlled to open corresponding defrost Switch stream, and open the magnetic valve.
2. air conditioner as claimed in claim 1, it is characterised in that the controller is additionally operable to:
When the air conditioner exits defrosting mode, keep the four-way valve when front steering is constant;The stream is controlled to switch Device opens the condenser stream closed during defrosting;Control the defrost switching stream that the defrost switch is opened when closing defrosting Road, and close the magnetic valve.
3. air conditioner as claimed in claim 1, it is characterised in that the controller is additionally operable to:
When the air conditioner is in heating mode, the stream switch is controlled to keep all condenser streams of the condenser Road is opening, and keeps all defrosts of the magnetic valve and the defrost switch to switch stream for closed mode.
4. the air conditioner as any one of claim 1-3, it is characterised in that the air conditioner also includes gas-liquid separation Device, the suction port of compressor is connected with gas-liquid separator outlet, the gas-liquid separator entrance goes out with the four-way valve one Mouth connection.
5. a kind of defrosting control method of air conditioner as claimed in claim 1, it is characterised in that the defrosting control of the air conditioner Method processed comprises the following steps:
Whether air conditioner currently meets defrosting condition described in the monitoring control devices;
When the air conditioner currently meets defrosting condition and enters defrosting mode, keep the four-way valve works as front steering not Become;
The condenser stream for controlling the stream switch to close at position to be defrosted, for cut off the condenser stream with it is described Passage between four-way valve;
Control the defrost switch to open corresponding defrost switching stream, and open the magnetic valve, for connecting the pressure Passage at the outlet of contracting machine and the position to be defrosted between condenser stream is defrosted.
6. the defrosting control method of air conditioner as claimed in claim 5, it is characterised in that the defrosting controlling party of the air conditioner Method also includes:
When the air conditioner exits defrosting mode, the controller keep the four-way valve when front steering is constant;Control institute State stream switch and open the condenser stream closed during defrosting;Control what the defrost switch was opened when closing defrosting Defrost switches stream, and closes the magnetic valve.
7. the defrosting control method of air conditioner as claimed in claim 5, it is characterised in that the defrosting controlling party of the air conditioner Method also includes:
When the air conditioner is in heating mode, the controller controls the institute of the stream switch holding condenser It is opening to have condenser stream, and keeps all defrosts of the magnetic valve and the defrost switch to switch stream to close Closed state.
8. the defrosting control method of the air conditioner as any one of claim 5-7, each bar condenser of the condenser Outer coil pipe is respectively equipped with stream, it is characterised in that whether air conditioner currently meets defrosting condition described in the monitoring control devices Including:
The whether continuous preset duration of the temperature of outer coil pipe described in the monitoring control devices is less than the first temperature value;
If, it is determined that the air conditioner currently meets defrosting condition.
9. inner coil pipe, the air conditioner are provided with the defrosting control method of air conditioner as claimed in claim 8, the evaporator Also include indoor fan, it is characterised in that before whether air conditioner currently meets defrosting condition described in the monitoring control devices, The defrosting control method of the air conditioner also includes:
When air conditioner start enters heating mode, the controller controls the stream switch to open the condenser All condenser streams, and close all defrosts switching stream of the magnetic valve and the defrost switch;
Judge whether the temperature of presently described inner coil pipe is more than second temperature value;
If so, then controlling the indoor fan to be run by wind speed setting, otherwise, the operating air velocity of the indoor fan is reduced.
10. the defrosting control method of the air conditioner as claimed in claim 8, it is characterised in that the defrosting control of the air conditioner Method also includes:
When the air conditioner enters defrosting mode, whether the temperature of outer coil pipe described in the monitoring control devices is more than the 3rd temperature Value;
If so, then controlling the air conditioner to exit defrosting mode.
CN201710468524.7A 2017-06-19 2017-06-19 Air conditioner and its defrosting control method Pending CN107084561A (en)

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EP3875873A1 (en) * 2020-03-05 2021-09-08 Carrier Corporation Refrigeration system with hot gas defrost
CN112050293A (en) * 2020-09-14 2020-12-08 西安交通大学 Air conditioning system for compensating indoor temperature change during defrosting based on phase-change material
CN112050293B (en) * 2020-09-14 2021-07-16 西安交通大学 Air conditioning system for compensating indoor temperature change during defrosting based on phase-change material

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Application publication date: 20170822