CN103471203A - Air conditioner defrosting control method and air conditioner system - Google Patents
Air conditioner defrosting control method and air conditioner system Download PDFInfo
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- CN103471203A CN103471203A CN2013103861934A CN201310386193A CN103471203A CN 103471203 A CN103471203 A CN 103471203A CN 2013103861934 A CN2013103861934 A CN 2013103861934A CN 201310386193 A CN201310386193 A CN 201310386193A CN 103471203 A CN103471203 A CN 103471203A
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Abstract
The invention discloses an air conditioner system comprising a compressor, a four-way valve, an outdoor heat exchanger, a first throttling part, an indoor heat exchanger, a first switch block, a three-way valve, a second throttling part and a control device. The first switch block is connected between an exhaust port of the compressor and an inlet of the outdoor heat exchanger during heating; the three-way valve is connected between the four-way valve and an air return port of the compressor; the second throttling part is connected between a port of the three-way valve and the air return port of the compressor. The control device firstly controls the first switch block to be turned on to perform bypass defrosting on the air conditioner when defrosting is needed, and controls the three-way valve to reverse so as to enable the second throttling valve to prolong staying time of refrigerant in the outdoor heat exchanger when bypass defrosting is not clean. The invention further discloses a defrosting control method of the air conditioner system. By the system and the method, defrosting time is shortened, and large indoor temperature fluctuation caused by reversing and defrosting of the four-way valve in the prior art is avoided.
Description
Technical field
The present invention relates to the air-conditioner field, relate in particular to a kind of defrosting control method and air-conditioner system of air-conditioner.
Background technology
As shown in Figures 1 and 2, traditional air-conditioning system is comprised of compressor 1, cross valve 2, outdoor heat exchanger 3, throttle part 4, indoor heat exchanger 5 at present, by compressor 1, drive refrigerant to circulate in system, when refrigerant is flowed through compressor 1, cross valve 2a → cross valve 2b → outdoor heat exchanger 3 → throttle part 4 → indoor heat exchanger 5 → cross valve 2d → cross valve 2c → compressor 1, its formation be kind of refrigeration cycle, indoor temperature is reduced.When refrigerant is flowed through compressor 1 → cross valve 2a → cross valve 2d → indoor heat exchanger 5 → throttle part 4 → outdoor heat exchanger 3 → cross valve 2b → cross valve 2c → compressor 1, its formation be to heat circulation, indoor temperature is raise.The refrigerant that heats circulation time indoor heat exchanger 5 is high-temperature high-pressure state, and the refrigerant in outdoor heat exchanger 3 is the low-temp low-pressure state, needs to absorb external heat and completes evaporation.When outdoor temperature is low, the temperature of outdoor heat exchanger 3 is usually less than 0 degree, and after operation a period of time, outdoor heat exchanger 3 will frosting, and after frosting, the temperature of outdoor heat exchanger 3 is more and more lower, has a strong impact on indoor heating effect.Therefore, every a period of time, will be defrosted to outdoor heat exchanger 3, and traditional defrosting mode is for to carry out reverse cycle defrost to cross valve 2, be that cross valve 2 is by a → d that originally heated circulation, b → c connection switches to kind of refrigeration cycle a → b, d → c connects, simultaneously, the refrigerant that by-passing valve 6 is opened the exhaust outlet A1 discharge that makes indoor heat exchanger 5 also directly enters outdoor heat exchanger 3 to realize the bypass defrosting of air-conditioner by by-passing valve 6, in whole defrost process, indoor heat exchanger 5 will be all the time at the inboard heat of absorption chamber, and compressor 1 needs to shut down 2 times from start to end, defrosting repeatedly not only causes fluctuations in indoor temperature larger, and defrosting time is longer.
Summary of the invention
The main purpose of the embodiment of the present invention is to provide a kind of defrosting control method and air-conditioner system of air-conditioner, is intended to shorten the defrost time, and has avoided cross valve of the prior art commutation defrost and the large phenomenon of fluctuations in indoor temperature that causes.
For reaching above purpose, the embodiment of the present invention provides a kind of air-conditioner system, comprise: the compressor connected by pipe arrangement successively, cross valve, outdoor heat exchanger, first throttle parts and indoor heat exchanger also comprise the first switch block, triple valve, second section stream unit and control respectively the control device of the first switch block, triple valve work; Described the first switch block is connected to the exhaust outlet of described compressor and while heating between the import of outdoor heat exchanger; Described triple valve is connected between the gas returning port of cross valve and compressor, and between the gas returning port of an interface of described second section stream unit connecting tee valve and compressor; Described control device comprises:
The first defrosting control module, when detecting the defrost instruction, open the first switch block, and air-conditioner is carried out to bypass defrosting, and stop defrost reaching while exiting the defrost condition;
Defrost time logging modle, for recording defrost t10 running time that opens the first switch block, and judge whether t10 is more than or equal to the first preset time;
The temperature acquisition module, for when described the first defrosting control module is opened the first switch block, the temperature T 5 in outdoor heat exchanger exit when Real-time Obtaining heats, carry out for the first defrosting control module the judgement that bypass defrosting exits;
The second defrosting control module, for when t10 is more than or equal to the first preset time, control the triple valve switching, so that the interface of cross valve is communicated with the gas returning port of compressor by triple valve and second section stream unit, air-conditioner carried out to defrost.
Preferably, when the temperature T 5 in described outdoor heat exchanger exit is more than or equal to the first preset temperature, exit defrost.
Preferably, described defrost time logging modle also for: after controlling the triple valve switching, defrost t11 running time after the described triple valve of record switching; Described temperature acquisition module also for: after controlling the triple valve switching, the temperature T 5 in the exit of outdoor heat exchanger when Real-time Obtaining heats;
Described the second defrosting control module also for: when t11 is more than or equal to the second preset time, exit defrost; Perhaps, when this temperature T 5 is more than or equal to the first preset temperature, exit defrost.
Preferably, described temperature acquisition module also for, while detecting the defrost instruction, obtain indoor environment temperature;
Described the second defrosting control module also for: when indoor environment temperature is less than the second preset temperature, switch described triple valve, so that the interface of cross valve is communicated with the gas returning port of compressor by triple valve and second section stream unit, air-conditioner carried out to defrost.
Preferably, described control device also comprises:
The defrost detection module, whether after compressor start heating operation the 3rd preset time, detecting air-conditioner needs defrost;
The defrost initialization module, for when air-conditioner needs defrost, operational factor when the current operational factor of air-conditioner is set to defrost, and send the defrost instruction.
The embodiment of the present invention also provides a kind of defrosting control method of air-conditioner, is applied to the described air-conditioner system of said structure, and this defrosting control method comprises the following steps:
While detecting the defrost instruction, open the first switch block, air-conditioner is carried out to bypass defrosting, record this defrost t10 running time simultaneously;
The temperature T 5 in the exit of outdoor heat exchanger when Real-time Obtaining heats;
When this temperature T 5 is more than or equal to the first preset temperature, exit defrost;
When t10 is more than or equal to the first preset time, control the triple valve switching, so that the interface of cross valve is communicated with the gas returning port of compressor by triple valve and second section stream unit, continue air-conditioner is carried out to defrost.
Preferably, after described control triple valve switching, also comprise:
Defrost t11 running time of the described triple valve of record switching, or obtain the temperature T 5 in the exit of outdoor heat exchanger while heating in real time;
When t11 is more than or equal to the second preset time, exit defrost; Perhaps, when this temperature T 5 is more than or equal to the first preset temperature, exit defrost.
Preferably, describedly also comprise while detecting the defrost instruction:
Obtain indoor environment temperature;
When indoor environment temperature is less than the second preset temperature, switch described triple valve, so that the interface of cross valve is communicated with the gas returning port of compressor by triple valve and second section stream unit, continue air-conditioner is carried out to defrost.
Preferably, described detecting before the defrost instruction also comprises:
Whether after compressor start heating operation the 3rd preset time, detecting air-conditioner needs defrost;
When air-conditioner needs defrost, operational factor when the current operational factor of air-conditioner is set to defrost, and send the defrost instruction.
Preferably, whether after described compressor start heating operation the 3rd preset time, detecting air-conditioner needs defrost to comprise:
After compressor start heating operation the 3rd preset time, the difference △ T=T30-T5 of the temperature T 30 of outdoor heat exchanger import department temperature T 5 in outdoor heat exchanger exit when heating when detection heats, and when △ T is more than or equal to the 3rd preset temperature, the judgement air-conditioner needs defrost, otherwise the judgement air-conditioner does not need defrost.
Preferably, described when air-conditioner needs defrost, operational factor when the current operational factor of air-conditioner is set to defrost comprises:
Detect outdoor environment temperature, and itself and the 4th preset temperature are compared;
When outdoor environment temperature is more than or equal to the 4th preset temperature, compressor operating frequency, indoor fan move the defrost parameter, running status when the auxiliary heat acquiescence of indoor electric heats;
When outdoor environment temperature is less than the 4th preset temperature, compressor operating frequency, indoor fan move defrost parameter, the auxiliary hot enforced opening of indoor electric.
Preferably, described defrosting control method also comprises:
While detecting the defrost instruction, time delay 1 the 4th preset time, and, after the 4th preset time arrives, open the first switch block, air-conditioner is carried out to defrost.
The embodiment of the present invention is when opening the first switch block air-conditioner is carried out to defrost, within detection time, whether defrost is clean in judgement, if defrost is unclean yet, pass through again switch three-way valve, make the second section stream unit can limit the flowing velocity of refrigerant, extended the time of staying of refrigerant in outdoor heat exchanger, thereby further accelerated the defrost of this outdoor heat exchanger, shorten the defrost time, and avoided cross valve of the prior art commutation defrost and the large phenomenon of fluctuations in indoor temperature that causes.
The accompanying drawing explanation
Fig. 1 is the structural representation of air-conditioner in prior art;
Fig. 2 is refrigerant flow schematic diagram when in prior art, air-conditioner carries out bypass defrosting;
Fig. 3 is the refrigerant flow schematic diagram of air-conditioner system of the present invention under normal heating mode;
Fig. 4 is the high-level schematic functional block diagram of control device the first embodiment in air-conditioner system of the present invention;
Fig. 5 is the refrigerant flow schematic diagram under the air-conditioner system defrost pattern shown in Fig. 3;
Fig. 6 is the high-level schematic functional block diagram of control device the second embodiment in air-conditioner system of the present invention;
Fig. 7 is the schematic flow sheet of defrosting control method first embodiment of air-conditioner of the present invention;
Fig. 8 is the schematic flow sheet of defrosting control method second embodiment of air-conditioner of the present invention;
Fig. 9 is the schematic flow sheet of defrosting control method the 3rd embodiment of air-conditioner of the present invention;
Figure 10 is the schematic flow sheet of defrosting control method the 4th embodiment of air-conditioner of the present invention.
The realization of the object of the invention, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
The specific embodiment
Further illustrate technical scheme of the present invention below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Main thought of the present invention is two kinds of defrost streams are set, and, in the running of air-conditioner, detect the operational factor of air-conditioner, and when selection to enter defrost, select which kind of defrost stream according to operational factor, when exits defrost.When the present invention can overcome existing air-conditioning system defrost, fluctuations in indoor temperature is larger, has greatly shortened the defrost time simultaneously.
Particularly, as shown in Figures 3 and 4, the embodiment of the present invention provides a kind of air-conditioner system the first embodiment.The air-conditioner system of this embodiment comprises: compressor 101, cross valve 102, outdoor heat exchanger 103, first throttle parts 104 and indoor heat exchanger 105, described compressor 101, cross valve 102, outdoor heat exchanger 103, first throttle parts 104 and indoor heat exchanger 105 are connected to form refrigerant circulation by pipe arrangement successively.Compressor 102 has exhaust outlet A1 and gas returning port A2; This cross valve 102 has four interfaces: interface a, interface b, interface c, interface d; Outdoor heat exchanger 103 has import B2 and the outlet B1 while heating.Air-conditioner system shown in Fig. 2 is under heating mode, the exhaust outlet A1 of the compressed machine 101 of refrigerant enters indoor heat exchanger 105 by interface a, the interface d of cross valve 102, then enter outdoor heat exchanger 103 through first throttle parts 104, after outlet B1 discharge by outdoor heat exchanger 103, last again by the interface b of cross valve 102, the gas returning port A2 that interface c is back to compressor 101, heat circulation thereby form one.
Above-mentioned air-conditioner system also comprises the first switch block 108, triple valve 107, second section stream unit 106 and controls the first switch block 108 and the control device 200 of triple valve 107 work:
This first switch block 108 is magnetic valve, and its input is connected with the exhaust outlet A1 of compressor 101, and output import B2 of outdoor heat exchanger 103 when heating is connected.Triple valve 107 comprises e interface, f interface and g interface, and wherein the e interface is connected with the c interface of cross valve 102, and the f interface directly is connected with the gas returning port A2 of compressor 101, and the g interface is connected with the gas returning port A2 of compressor 101 by second section stream unit 106.Above-mentioned control device 200 comprises:
The first defrosting control module 201, when detecting the defrost instruction, open the first switch block 108, and close chamber's external fan 109, carry out defrost to air-conditioner; When temperature T 5 is more than or equal to the first preset temperature T1, exit defrost;
Defrost time logging modle 202, open the first switch block 108 for recording, defrost t10 running time of close chamber's external fan 109, and judge whether t10 is more than or equal to the first preset time;
The second defrosting control module 204, while for t10, being more than or equal to the first preset time, control triple valve 107 switchings, so that the interface of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.
The first defrosting control module 201, when detecting the defrost instruction, is opened the first switch block 108, and close chamber's external fan 109.Simultaneously, defrost time logging modle 202 will start to record its defrost running time when the first defrosting control module 201 is opened the first switch block 108, and this defrost t10 running time and the first preset time t1 are compared.When t10 >=t1, control triple valve 107 switchings, so that the interface c of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost; When t10<t1, do not process, carry out defrost by former defrost mode.In the present embodiment, this defrost time logging modle 202 is a timer, and the threshold value t1 of this timer is set, and in the embodiment of the present invention, this threshold value t1 is 0 ~ 5 minute, is preferably 2 minutes.When the time that timer is counted reaches threshold value t1, produce triggering signal, to trigger the second defrosting control module 204 switch three-way valves 107, so that the c interface of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.Now, as shown in Figure 5, after the exhaust outlet A1 discharge of this refrigerant by compressor 101, a part of refrigerant enters indoor heat exchanger 105 through interface a, the interface d of cross valve 102, and then enters outdoor heat exchanger 103 by first throttle parts 104; Another part refrigerant directly enters outdoor heat exchanger 103 due to the conducting of the first switch block 108.Refrigerant through outdoor heat exchanger 103 is flowed out by the B1 mouth, and by interface b, the interface c of cross valve 102, the interface e of triple valve 107, interface g, process second section stream unit 106 is back to the gas returning port A2 of compressor 101.
In addition, when the first defrosting control module 201 is opened the first switch block 108, the temperature T 5 at the outlet B1 place of outdoor heat exchanger 103 when temperature acquisition module 203 will detect heating operation, this temperature T 5 can be by being arranged on outdoor heat exchanger 103 the temperature sensor 111 at outlet B1 place detected, then send it to temperature acquisition module 203.This temperature sensor 111, by the temperature at the outlet B1 place of real-time sensing chamber external heat exchanger 103, obtains for temperature acquisition module 203.When the accessed temperature T 5 of this temperature acquisition module 203 is more than or equal to the first preset temperature T1, exit defrost, close the first switch block 108, opening chamber's external fan 109, enter normal heating mode.When the accessed temperature of temperature acquisition module 203 is less than the first preset temperature T1, continue to obtain the temperature at the outlet B1 place of outdoor heat exchanger 103, to judge whether exiting defrost.Until defrost t10 running time recorded is more than or equal to the first preset time t1, the second defrosting control module 204 is controlled the switching of triple valve 107, so that the interface c of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.Be understandable that, said temperature acquisition module 203 can be same parts with temperature sensor 111.In the present embodiment, this first preset temperature T1 is 0 ~ 10 degree, is preferably 2 degree.
Be understandable that, when above-mentioned the first defrosting control module 201 is carried out bypass defrosting at the control air-conditioner, also can only open the first switch block 108, and outdoor fan 109 be failure to actuate.
The embodiment of the present invention is when opening the first switch block 108,109 pairs of air-conditioners of close chamber's external fan and carry out defrost, in detection time t1, whether defrost is clean in judgement, if defrost is unclean yet, again by switch three-way valve 107, make second section stream unit 106 can limit the flowing velocity of refrigerant, extended the time of staying of refrigerant in outdoor heat exchanger 103, thereby further accelerated the defrost of this outdoor heat exchanger 103, shorten the defrost time, and avoided cross valve of the prior art commutation defrost and the large phenomenon of fluctuations in indoor temperature that causes.
Further, in above-mentioned control device 200:
Described defrost time logging modle 202 also for: after controlling triple valve 107 switchings, defrost t11 running time after the described triple valve 107 of record switching;
Described temperature acquisition module 203 also for: after controlling triple valve 107 switchings, the temperature T 5 at the outlet B1 place of outdoor heat exchanger 103 when Real-time Obtaining heats;
Described the second defrosting control module 206 also for: when t11 is less than the second preset time t2, when this temperature T 5 is less than the first preset temperature T1, the state that the c interface that keeps cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106.
When keeping the first state that switch block 108 is opened, outdoor fan 109 is closed, after also switching described triple valve 107, will again record this defrost t11 running time simultaneously.And this time t11 and the second preset time t2 are compared, if when time t11 is more than or equal to time t2, exit defrost; Otherwise the state that the c interface that continues maintenance cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106.In addition, when keeping the first state that switch block 108 is opened, outdoor fan 109 is closed, after also switching described triple valve 107 simultaneously, the temperature T 5 at the outlet B1 place of outdoor heat exchanger 103 while can also Real-time Obtaining heating, and itself and the first preset temperature T1 are compared, when if temperature T 5 is more than or equal to temperature T 1, exit defrost; Otherwise the state that the c interface that continues maintenance cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106.This exits defrost and refers to and close the first switch block 108, opening chamber's external fan 109, and switch three-way valve 107, so that the c interface of cross valve 102 directly is communicated with the gas returning port A2 of compressor 101 by triple valve 107, recovers normal heating mode.In the present embodiment, this second preset time t2 is 5 ~ 15 minutes, is preferably 10 minutes.
The embodiment of the present invention, by the temperature at defrost time or while heating outdoor heat exchanger 103 outlet B1 places, judges whether to exit defrost, if both one of satisfiedly can exit defrost.Thereby realized detecting defrost and can exit in time defrost when clean, also avoided the defrost overlong time and affected air-conditioner moving normally.
Based on above-mentioned the second embodiment, the present invention also provides air-conditioner system the second embodiment.In the control device of the air-conditioner system of this embodiment:
Described temperature acquisition module 203 also for, when detecting the defrost instruction, obtain indoor environment temperature;
Described the second defrosting control module 204 also for, when indoor environment temperature is less than the second preset temperature T2, switch described triple valve 107, the c interface of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.
When detecting the defrost instruction, temperature acquisition module 203 is also by the Real-time Obtaining indoor environment temperature, and by itself and the second preset temperature T2 relatively.When obtained indoor environment temperature is less than the second preset temperature T2, when in the first defrosting control module 201, according to the defrost instruction, controlling the closing of unlatching, outdoor fan 109 of the first switch block 108, the second defrosting control module 204 also will be switched described triple valve 107, the c interface of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.In the present embodiment, this second preset temperature T2 is 0 ~ 20 degree, is preferably 0 degree.When obtained indoor environment temperature is more than or equal to the second preset temperature, the second defrosting control module 204 is failure to actuate, and the first defrosting control module 201 is controlled the closing of unlatching, outdoor fan 109 of the first switch block 108 according to the defrost instruction, air-conditioner is carried out to defrost.
The embodiment of the present invention, by when air-conditioner is carried out to defrost, according to the comparative result of indoor environment temperature and the second preset temperature, selects corresponding defrost stream to carry out defrost to air-conditioner, has further accelerated defrost speed, has shortened the defrost time.
Further, with reference to Fig. 6, based on the first or second embodiment, the 3rd embodiment of air-conditioner system of the present invention has also been proposed.Control device in this embodiment also comprises:
Particularly, after said temperature acquisition module 203 also starts heating operation the 3rd preset time t3 for: compressor 101, the temperature T 5 at the temperature T 30 of obtaining outdoor heat exchanger 103 import B2 while heating outdoor heat exchanger 103 outlet B1 places when heating.The difference △ T=T30-T5 of the temperature T 30 at 205 counting chamber external heat exchangers of above-mentioned defrost detection module, 103 import B2 places temperature T 5 at outdoor heat exchanger 103 outlet B1 places when heating, and by △ T and the 3rd preset temperature T3 comparison; When △ T is more than or equal to the 3rd preset temperature T3, the judgement air-conditioner needs defrost, otherwise the judgement air-conditioner does not need defrost.
The minimum of the temperature at the import B2 place of outdoor heat exchanger 103 when said temperature T30 refers to heating of obtaining when compressor 101 starts in operation a period of time.This temperature T 30 can detect acquisition by the temperature sensor 110 that is arranged on the import B2 place of outdoor heat exchanger 103 while heating.T5 refers to the temperature of outdoor heat exchanger 103 outlet B1 while heating.This temperature T 5 can detect acquisition by the temperature sensor 111 that is arranged on the outlet B1 place of outdoor heat exchanger 103 while heating.Defrost detection module 205 is after compressor 101 starts heating operation the 3rd preset time t3, obtain temperature T 30 and temperature T 5 by temperature acquisition module 203, then the temperature difference △ T of accounting temperature T30 and temperature T 5, and by this temperature difference △ T and the 3rd preset temperature T3 relatively.When temperature difference △ T is more than or equal to the 3rd preset temperature T3, judge that air-conditioner needs defrost, otherwise the judgement air-conditioner does not need defrost.In the present embodiment, the 3rd preset temperature T3 is 0 ~ 15 degree, is preferably 5 degree.
Said temperature acquisition module 203 also for: detect while needing defrost at defrost detection module 205, obtain outdoor environment temperature.Above-mentioned defrost initialization module 206 for: the outdoor environment temperature that temperature acquisition module 203 is obtained and the 4th preset temperature compare; When outdoor environment temperature is more than or equal to the 4th preset temperature T4, compressor 101 running frequencies, indoor fan 112 move the defrost parameters, running status when auxiliary hot 113 acquiescences of indoor electric heat; When outdoor environment temperature is less than the 4th preset temperature T4, compressor 101 running frequencies, indoor fan 112 move defrost parameters, auxiliary hot 113 enforced openings of indoor electric.In the present embodiment, the 4th preset temperature T4 is-2 ~ 5 degree, is preferably 0 degree.Be understandable that, when exiting defrost, the operational factor of air-conditioner will return to normal operational factor from the defrost parameter, normally to heat.
Further, in the above-mentioned first or second embodiment, the first defrosting control module 201, when detecting the defrost instruction, will be opened the first switch block 108 after time delay the 4th preset time t4, and close chamber's external fan 109, to carry out defrost to air-conditioner.In the present embodiment, the 4th preset time t4 is 0 ~ 30 second, is preferably 5 seconds, after arranging successfully with the operational factor that guarantees air-conditioner, then carries out defrost.
With reference to Fig. 7, defrosting control method first embodiment of a kind of air-conditioner of the present invention has been proposed.Based on foregoing air-conditioner system, the defrosting control method of the air-conditioner of this embodiment comprises the following steps:
Step S110, while detecting the defrost instruction, open the first switch block, close chamber's external fan, carry out defrost to air-conditioner, records the time t10 of this defrost simultaneously;
Open so that air-conditioner is carried out to defrost when the first switch block 108, start timer, record the time t10 of this defrost.
Step S120, obtain the temperature T 5 at the outlet B1 place of outdoor heat exchanger while heating, and by this temperature T 5 and the first preset temperature T1 relatively;
In the process of above-mentioned defrost, the temperature T 5 at the outlet B1 place of outdoor heat exchanger 103 when detecting heating operation, the temperature sensor 111 at the outlet B1 place that this temperature T 5 can be by being arranged on outdoor heat exchanger 103 is detected.
Step S130, when temperature T 5 is more than or equal to the first preset temperature T1, exit defrost.
When temperature T 5 is more than or equal to the first preset temperature T1, exit defrost, close the first switch block 108, opening chamber's external fan 109, enter normal heating mode.When temperature T 5 is less than the first preset temperature T1, continue keeps the closing of unlatching, outdoor fan 109 of the first switch block 108, and obtain the temperature T 5 at the outlet B1 place of outdoor heat exchanger 103, to judge whether exiting defrost.
Step S140, when temperature T 5 is less than the first preset temperature T1, judge whether t10 is more than or equal to the first preset time t1; When t10 is more than or equal to the first preset time, proceed to step S150; When t10 is less than the first preset time t1, proceed to step S120;
Step S150, keep the first switch block 108 to open, outdoor fan 109 is closed, switch described triple valve 107 simultaneously, the c interface of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.
When the time that timer is counted reaches the first preset time t1, produce triggering signal, to trigger the switching of triple valve 107, so that the c interface of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.Now, as shown in Figure 5, after the exhaust outlet A1 discharge of this refrigerant by compressor 101, a part of refrigerant enters indoor heat exchanger 105 through interface a, the interface d of cross valve 102, and then enters outdoor heat exchanger 103 by first throttle parts 104; Another part refrigerant directly enters outdoor heat exchanger 103 due to the conducting of the first switch block 108.Refrigerant through outdoor heat exchanger 103 is flowed out by the B1 mouth, and by interface b, the interface c of cross valve 102, the interface e of triple valve 107, interface g, process second section stream unit 106 is back to the gas returning port A2 of compressor 101.
When the time that timer is counted does not reach the first preset time t1, switch three-way valve 107 not, continue to keep the first state that switch block 108 is opened, outdoor fan 109 is closed.Detect the temperature T 5 at the outlet B1 place of outdoor heat exchanger 103 while heating simultaneously, and this temperature T 5 and the first preset temperature T1 are compared, to judge whether exiting defrost.
The embodiment of the present invention is when opening the first switch block 108,109 pairs of air-conditioners of close chamber's external fan and carry out defrost, in detection time t1, whether defrost is clean, if defrost is unclean yet, again by switch three-way valve 107, make second section stream unit 106 can limit the flowing velocity of refrigerant, extended the time of staying of refrigerant in outdoor heat exchanger 103, thereby further accelerated the defrost of this outdoor heat exchanger 103, shorten the defrost time, and avoided cross valve of the prior art commutation defrost and the large phenomenon of fluctuations in indoor temperature that causes.
Further, with reference to Fig. 8, defrosting control method second embodiment of air-conditioner of the present invention is proposed.In this embodiment, after the step S150 of above-described embodiment, also comprise:
Defrost time t11 after step S160, the described triple valve of record switching;
Step S170, judge whether t11 is more than or equal to the second preset time t2; When t11 is more than or equal to the second preset time t2, proceed to step S200; When t11 is less than the second preset time t2, return to step S150;
When keeping the first state that switch block 108 is opened, outdoor fan 109 is closed, after also switching described triple valve 107, the time t11 of this defrost will be recorded simultaneously.And this time t11 and the second preset time t2 are compared, if when time t11 is more than or equal to time t2, exit defrost; Otherwise the state that the c interface that continues maintenance cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106.
The temperature T 5 of the outlet B1 of outdoor heat exchanger 103 when step S180, detection heat;
Step S190, judge whether temperature T 5 is more than or equal to the first preset temperature T1; When this temperature T 5 is more than or equal to the first preset temperature T1, proceed to step S200; When temperature T 5 is less than the first preset temperature T1, return to step S150;
When keeping the first state that switch block 108 is opened, outdoor fan 109 is closed, after also switching described triple valve 107 simultaneously, the temperature T 5 at the outlet B1 place of outdoor heat exchanger 103 while can also Real-time Obtaining heating, and itself and the first preset temperature T1 are compared, when if temperature T 5 is more than or equal to temperature T 1, exit defrost; Otherwise the state that the c interface that continues maintenance cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106.
Step S200, exit defrost.
This exits defrost and refers to and close the first switch block 108, opening chamber's external fan 109, and switch three-way valve 107, so that the c interface of cross valve 102 directly is communicated with the gas returning port A2 of compressor 101 by triple valve 107, recovers normal heating mode.
The embodiment of the present invention, by the temperature at defrost time or while heating outdoor heat exchanger 103 import B2 places, judges whether to exit defrost, if both one of meet and can exit defrost.Thereby realized detecting defrost and can exit in time defrost when clean, also avoided the defrost time course and affected air-conditioner moving normally.
Further, with reference to Fig. 9, defrosting control method the 3rd embodiment of air-conditioner of the present invention is proposed.In this embodiment, the defrosting control method of air-conditioner comprises:
Step S210, while detecting the defrost instruction, detect indoor environment temperature, and judge whether this indoor environment temperature is more than or equal to the second preset temperature T2; When indoor environment temperature is more than or equal to the second preset temperature T2, perform step S220; When indoor environment temperature is less than the second preset temperature T2, perform step S260;
When detecting the defrost instruction, by the Real-time Obtaining indoor environment temperature, and itself and the second preset temperature T2 are compared.
Step S220, open the first switch block, close chamber's external fan, carry out defrost to air-conditioner, records the time t10 of this defrost simultaneously;
When obtained indoor environment temperature is more than or equal to the second preset temperature, the second defrosting control module 204 is failure to actuate, and the first defrosting control module 201 is controlled the closing of unlatching, outdoor fan 109 of the first switch blocks 108, and air-conditioner is carried out to defrost.
Step S230, obtain the temperature T 5 at the outlet B1 place of outdoor heat exchanger while heating, and by this temperature T 5 and the first preset temperature T1 relatively;
In the first defrosting control module 201 is carried out the process of defrosting control, will obtain the temperature T 5 at the outlet B1 place of outdoor heat exchanger while heating, and this temperature T 5 and the first preset temperature T1 are compared, to judge whether exiting defrost.
Step S240, when temperature T 5 is more than or equal to the first preset temperature T1, exit defrost;
Step S250, when temperature T 5 is less than the first preset temperature T1, judge whether t10 is more than or equal to the first preset time t1; When t10 is more than or equal to the first preset time, proceed to step S260; When t10 is less than the first preset time t1, proceed to step S230;
When temperature T 5 is less than the first preset temperature T1, whether the defrost time t10 that judgement is recorded is more than or equal to the first preset time t1.
Step S260, keep the first switch block 108 to open, outdoor fan 109 is closed, switch described triple valve 107 simultaneously, the c interface of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.
When judgement the first defrosting control module 201 while carrying out defrosting control the defrost time, t10 was more than or equal to the first preset time t1 the time, the second defrosting control module 204 actions, control triple valve 107 switchings.In addition, when detecting the defrost instruction, not only the first defrosting control module 201 will be controlled the closing of unlatching, outdoor fan 109 of the first switch block 108, the second defrosting control module 204 also will be switched described triple valve 107 simultaneously, the c interface of cross valve 102 is communicated with the gas returning port A2 of compressor 101 by triple valve 107 and second section stream unit 106, air-conditioner is carried out to defrost.
The embodiment of the present invention, by when air-conditioner is carried out to defrost, according to the comparative result of indoor environment temperature and the second preset temperature T2, selects corresponding defrost stream to carry out defrost to air-conditioner, has further accelerated defrost speed, has shortened the defrost time.
Further, with reference to Figure 10, defrosting control method the 4th embodiment of air-conditioner of the present invention is proposed.In this embodiment, before step S110, also comprise in the above-described embodiments:
Whether after step S100a, compressor start heating operation the 3rd preset time, detecting air-conditioner needs defrost;
One timer is set, and this timer starts according to corresponding the triggering, for recording the running time of air-conditioner.For example, when compressor 101 starts heating operation, start timer, the running time of air-conditioner after recording compressed machine 101 starts.After machine 101 to be compressed starts the 3rd preset time t3, whether 205 of defrost detection modules detect air-conditioner needs defrost.The setting of the 3rd preset time t3 is that air-conditioner carries out normal operating condition for after making compressor start.Whether when air-conditioner not detected and need defrost, continuing the monitoring air-conditioner needs defrost.
Step S100b, when air-conditioner needs defrost, operational factor when the current operational factor of air-conditioner is set to defrost;
When air-conditioner being detected and need defrost, operational factor when first the current operational factor of air-conditioner is set to defrost, for example state of the rotating speed of the running frequency of compressor, indoor fan, the auxiliary heat of indoor electric etc.
Further, step S100a in above-described embodiment is specially: after compressor 101 starts heating operation the first preset time, the difference △ T=T30-T5 of the temperature T 30 of outdoor heat exchanger 103 import B2 temperature T 5 of outdoor heat exchanger 103 outlet B1 when heating when detection heats, and when △ T is more than or equal to the 3rd preset temperature T3, the judgement air-conditioner needs defrost, otherwise the judgement air-conditioner does not need defrost.
The minimum of the temperature of the import B2 of outdoor heat exchanger 103 when said temperature T30 refers to heating of obtaining when compressor 101 starts in operation a period of time.This temperature T 30 can detect acquisition by the temperature sensor 110 that is arranged on the import B2 place of outdoor heat exchanger 103 while heating.T5 refers to the temperature of outdoor heat exchanger 103 outlet B1 while heating.This temperature T 5 can detect acquisition by the temperature sensor 111 that is arranged on the outlet B1 place of outdoor heat exchanger 103 while heating.After compressor 101 starts heating operation the first preset times, obtain temperature T 30 and temperature T 5, the temperature difference △ T of accounting temperature T30 and temperature T 5 then, and by this temperature difference △ T and the 3rd preset temperature T3 comparison.When temperature difference △ T is more than or equal to the 3rd preset temperature T3, judge that air-conditioner needs defrost, otherwise the judgement air-conditioner does not need defrost.
Further, the step S100b in above-described embodiment specifically comprises:
A, detection outdoor environment temperature, and itself and the 4th preset temperature T4 are compared;
B, when outdoor environment temperature is more than or equal to the 4th preset temperature T4, compressor 101 running frequencies, indoor fan 112 operation defrost parameters, running status when auxiliary hot 113 acquiescences of indoor electric heat;
C, when outdoor environment temperature is less than the 4th preset temperature T4, compressor 101 running frequencies, indoor fan 112 operation defrost parameters, auxiliary hot 113 enforced openings of indoor electric.
Be understandable that, when exiting defrost, the operational factor of air-conditioner will return to normal operational factor from the defrost parameter, normally to heat.
Further, when detecting the defrost instruction, by time delay 1 the 4th preset time t4, and, after the 4th preset time t4 arrives, open the first switch block, close chamber's external fan, carry out defrost to air-conditioner.
Further, in above-mentioned the first embodiment, after the operational factor of the first defrosting control module 201 when the operational factor of air-conditioner is set to defrost, by after time delay the 4th preset time t4, open the first switch block 108, close chamber's external fan 109, to carry out defrost to air-conditioner again.In the present embodiment, the setting of the 4th preset time, after arranging successfully with the operational factor that guarantees air-conditioner, then carry out defrost.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that above-described embodiment method can add essential general hardware platform by software and realize, can certainly pass through hardware, but in a lot of situation, the former is better embodiment.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprise that some instructions are with so that a station terminal equipment (can be mobile phone, computer, server, or the network equipment etc.) the described method of execution each embodiment of the present invention.
The foregoing is only the preferred embodiments of the present invention; not thereby limit its scope of the claims; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (12)
1. an air-conditioner system, comprise: the compressor connected by pipe arrangement successively, cross valve, outdoor heat exchanger, first throttle parts and indoor heat exchanger, it is characterized in that, also comprise the first switch block, triple valve, second section stream unit and control respectively the control device of the first switch block, triple valve work; Described the first switch block is connected to the exhaust outlet of described compressor and while heating between the import of outdoor heat exchanger; Described triple valve is connected between the gas returning port of cross valve and compressor, and between the gas returning port of an interface of described second section stream unit connecting tee valve and compressor; Described control device comprises:
The first defrosting control module, when detecting the defrost instruction, open the first switch block, and air-conditioner is carried out to bypass defrosting, and stop defrost reaching while exiting the defrost condition;
Defrost time logging modle, for recording defrost t10 running time that opens the first switch block, and judge whether t10 is more than or equal to the first preset time;
The temperature acquisition module, for when described the first defrosting control module is opened the first switch block, the temperature T 5 in outdoor heat exchanger exit when Real-time Obtaining heats, carry out for the first defrosting control module the judgement that bypass defrosting exits;
The second defrosting control module, for when t10 is more than or equal to the first preset time, control the triple valve switching, so that the interface of cross valve is communicated with the gas returning port of compressor by triple valve and second section stream unit, air-conditioner carried out to defrost.
2. air-conditioner system according to claim 1, is characterized in that, when the temperature T 5 in described outdoor heat exchanger exit is more than or equal to the first preset temperature, exits defrost.
3. air-conditioner system according to claim 1, is characterized in that, described defrost time logging modle also for: after controlling the triple valve switching, defrost t11 running time after the described triple valve of record switching; Described temperature acquisition module also for: after controlling the triple valve switching, the temperature T 5 in the exit of outdoor heat exchanger when Real-time Obtaining heats;
Described the second defrosting control module also for: when t11 is more than or equal to the second preset time, exit defrost; Perhaps, when this temperature T 5 is more than or equal to the first preset temperature, exit defrost.
4. according to the described air-conditioner system of claim 1-3 any one, it is characterized in that, described temperature acquisition module also for, while detecting the defrost instruction, obtain indoor environment temperature;
Described the second defrosting control module also for: when indoor environment temperature is less than the second preset temperature, switch described triple valve, so that the interface of cross valve is communicated with the gas returning port of compressor by triple valve and second section stream unit, air-conditioner carried out to defrost.
5. air-conditioner system according to claim 1, is characterized in that, described control device also comprises:
The defrost detection module, whether after compressor start heating operation the 3rd preset time, detecting air-conditioner needs defrost;
The defrost initialization module, for when air-conditioner needs defrost, operational factor when the current operational factor of air-conditioner is set to defrost, and send the defrost instruction.
6. the defrosting control method of an air-conditioner, is characterized in that, is applied to air-conditioner system claimed in claim 1, and this defrosting control method comprises the following steps:
While detecting the defrost instruction, open the first switch block, air-conditioner is carried out to bypass defrosting, record the time t10 of this defrost simultaneously;
The temperature T 5 in the exit of outdoor heat exchanger when Real-time Obtaining heats;
When this temperature T 5 is more than or equal to the first preset temperature, exit defrost;
When t10 is more than or equal to the first preset time, control the triple valve switching, so that the interface of cross valve is communicated with the gas returning port of compressor by triple valve and second section stream unit, continue air-conditioner is carried out to defrost.
7. the defrosting control method of air-conditioner according to claim 6, is characterized in that, after described control triple valve switching, also comprises:
Defrost t11 running time of the described triple valve of record switching, or the temperature T 5 in Real-time Obtaining exit of outdoor heat exchanger while heating;
When t11 is more than or equal to the second preset time, exit defrost; Perhaps, when this temperature T 5 is more than or equal to the first preset temperature, exit defrost.
8. according to the defrosting control method of claim 6 or 7 described air-conditioners, it is characterized in that, describedly also comprise while detecting the defrost instruction:
Obtain indoor environment temperature;
When indoor environment temperature is less than the second preset temperature, switch described triple valve, so that the interface of cross valve is communicated with the gas returning port of compressor by triple valve and second section stream unit, continue air-conditioner is carried out to defrost.
9. the defrosting control method of air-conditioner according to claim 6, is characterized in that, described detecting before the defrost instruction also comprises:
Whether after compressor start heating operation the 3rd preset time, detecting air-conditioner needs defrost;
When air-conditioner needs defrost, operational factor when the current operational factor of air-conditioner is set to defrost, and send the defrost instruction.
10. the defrosting control method of air-conditioner according to claim 9, is characterized in that, whether after described compressor start heating operation the 3rd preset time, detecting air-conditioner needs defrost to comprise:
After compressor start heating operation the 3rd preset time, the difference △ T=T30-T5 of the temperature T 30 of outdoor heat exchanger import department temperature T 5 in outdoor heat exchanger exit when heating when detection heats, and when △ T is more than or equal to the 3rd preset temperature, the judgement air-conditioner needs defrost, otherwise the judgement air-conditioner does not need defrost.
11. the defrosting control method of air-conditioner according to claim 9, is characterized in that, described when air-conditioner needs defrost, operational factor when the current operational factor of air-conditioner is set to defrost comprises:
Detect outdoor environment temperature, and itself and the 4th preset temperature are compared;
When outdoor environment temperature is more than or equal to the 4th preset temperature, compressor operating frequency, indoor fan move the defrost parameter, running status when the auxiliary heat acquiescence of indoor electric heats;
When outdoor environment temperature is less than the 4th preset temperature, compressor operating frequency, indoor fan move defrost parameter, the auxiliary hot enforced opening of indoor electric.
12. the defrosting control method of air-conditioner according to claim 6, is characterized in that, described defrosting control method also comprises:
While detecting the defrost instruction, by time delay 1 the 4th preset time, and, after the 4th preset time arrives, open the first switch block, air-conditioner is carried out to defrost.
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