CN104534754A - Mobile air conditioner and frost removal control method thereof - Google Patents
Mobile air conditioner and frost removal control method thereof Download PDFInfo
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- CN104534754A CN104534754A CN201410713576.2A CN201410713576A CN104534754A CN 104534754 A CN104534754 A CN 104534754A CN 201410713576 A CN201410713576 A CN 201410713576A CN 104534754 A CN104534754 A CN 104534754A
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- defrost
- time
- tube temperature
- condenser tube
- compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a frost removal control method of a mobile air conditioner. The frost removal control method of the mobile air conditioner includes following steps: obtaining running time of a compressor and tube temperature of a condenser; judging whether meeting frost removal start conditions according to the running time of the compressor and the tube temperature of the condenser; if meeting the frost removal start conditions, starting frost removal; further obtaining tube temperature and frost removal time of the condenser after the frost removal; judging whether meeting frost removal end conditions according to the tube temperature and the frost removal time of the condenser, obtained after the frost removal; if meeting the frost removal end conditions, finishing the frost removal. The frost removal control method of the mobile air conditioner judges whether the frost removal start conditions are met according to the running time of the compressor and the tube temperature of the condenser, and thereby stipulates the shortest running time of the compressor, prevents frequent frost removal, and guarantees that the mobile air conditioner is in a frostless state in heating running to the greatest extent. Furthermore, the frost removal control method of the mobile air conditioner judges whether the frost removal end conditions are met according to the tube temperature and the frost removal time of the condenser, obtained after the frost removal, and thereby stipulates the longest frost removal time, prevents the frost removal time from being unnecessarily long, and improves experience of a user. The invention further discloses the mobile air conditioner.
Description
Technical field
The present invention relates to technical field of electric appliances, particularly a kind of defrosting control method of mobile air conditioner and a kind of mobile air conditioner.
Background technology
Mobile air conditioner is after heating operation a period of time, and the surface of condenser starts frosting, and air-conditioner service condition starts to worsen, and air-conditioner service condition worsens also can accelerate frosting, thus frost is cumulative, even icing, has a strong impact on heating effect.And after mobile air conditioner is shut down, the frost on condenser will melt, a large amount of condensed water overflows chassis, thus has a strong impact on user's use, and mobile air conditioner needs to carry out defrost thus.
Some defrosting control methods have been proposed in correlation technique, but the problem that correlation technique exists defrost overlong time usually, frequent defrost does not heat, thus affect the use of user.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is the defrosting control method proposing a kind of mobile air conditioner, ensures that mobile air conditioner is in frostless state in heating operation as far as possible, and avoids defrost overlong time.
Another object of the present invention is to propose a kind of mobile air conditioner.
The defrosting control method of a kind of mobile air conditioner of embodiment proposition according to an aspect of the present invention, comprises the following steps: the running time and the condenser tube temperature that obtain compressor; Judge whether to meet defrost entry condition according to running time of described compressor and condenser tube temperature; If meet described defrost entry condition, then start defrost; The further acquisition defrost post-condenser pipe gentle defrost time; Judge whether to meet defrost termination condition according to the described defrost post-condenser pipe gentle defrost time; If meet described defrost termination condition, then terminate defrost.
According to the defrosting control method of the mobile air conditioner that the embodiment of the present invention proposes, judge whether to meet defrost entry condition by running time of compressor and condenser tube temperature, thus the shortest running time of regulation compressor, avoid frequent defrost, and ensure that mobile air conditioner is in frostless state in heating operation as far as possible; Judge whether to meet defrost termination condition by the defrost post-condenser pipe gentle defrost time, thus specify the maximum defrost time, avoid defrost overlong time, promote the experience of user.
According to one embodiment of present invention, the described running time according to described compressor and condenser tube temperature judge whether that meeting defrost entry condition specifically comprises: if described compressor runs more than the first Preset Time continuously, then obtain the accumulative heating operation time of described compressor further; If met the following conditions simultaneously, then judge to meet described defrost entry condition: A, described condenser tube temperature and the temperature difference preset between maximum condenser tube temperature are more than or equal to default temperature difference threshold value; B, described condenser tube temperature continue to be less than first and preset condenser tube temperature threshold value in the second Preset Time; C, described accumulative heating operation time are greater than default cumulative time threshold value.
According to another embodiment of the invention, the described running time according to described compressor and condenser tube temperature judge whether that meeting defrost entry condition specifically comprises: if described compressor runs more than described first Preset Time continuously, then judge whether described condenser tube temperature continues to be less than second and preset condenser tube temperature threshold value in the 3rd Preset Time; If continue to be less than second to preset condenser tube temperature threshold value, then obtain the accumulative heating operation time of described compressor further; If the described accumulative heating operation time is greater than described default cumulative time threshold value, then judge to meet described defrost entry condition.
According to still another embodiment of the invention, the defrosting control method of described mobile air conditioner also comprises: if met the following conditions simultaneously, then judge to meet to become privileged ice-lolly part: D, described condenser tube temperature continue to be less than first and preset condenser tube temperature threshold value in the second Preset Time; E, described accumulative heating operation time are greater than default cumulative time threshold value.
Further, after judgement meets described particularization ice-lolly part, defrost is carried out with the default defrost time.
According to some embodiments of the present invention, describedly judge whether that meeting defrost termination condition specifically comprises according to the described defrost post-condenser pipe gentle defrost time: if the described defrost time is greater than the default defrost time, then judge to meet described defrost termination condition; If or described defrost post-condenser Guan Wen is more than or equal to the 3rd default condenser tube temperature threshold value, then judge to meet described defrost termination condition.
The mobile air conditioner of embodiment proposition, comprising: condenser pipe according to a further aspect of the present invention; Temperature detector, for detecting the Guan Wen of described condenser pipe; Compressor; Controller, for obtaining the running time of described compressor and described condenser tube temperature, and judge whether to meet defrost entry condition according to running time of described compressor and condenser tube temperature, if meet described defrost entry condition, then start defrost, and obtain the defrost post-condenser pipe gentle described defrost time further, and judge whether to meet defrost termination condition according to the described defrost post-condenser pipe gentle defrost time, if meet described defrost termination condition, then terminate defrost.
According to the mobile air conditioner that the embodiment of the present invention proposes, controller judges whether to meet defrost entry condition by running time of compressor and condenser tube temperature, thus the shortest running time of regulation compressor, avoid frequent defrost, and ensure that mobile air conditioner is in frostless state in heating operation as far as possible; The defrost post-condenser pipe gentle defrost time judges whether to meet defrost termination condition controller excessively all, thus specifies the maximum defrost time, avoids defrost overlong time, promotes the experience of user.
According to one embodiment of present invention, if described compressor runs more than the first Preset Time continuously, then described controller obtains the accumulative heating operation time of described compressor further, if met the following conditions simultaneously, then described controller judges to meet described defrost entry condition: A, described condenser tube temperature and the temperature difference preset between maximum condenser tube temperature are more than or equal to default temperature difference threshold value; B, described condenser tube temperature continue to be less than first and preset condenser tube temperature threshold value in the second Preset Time; C, described accumulative heating operation time are greater than default cumulative time threshold value.
According to another embodiment of the invention, if described compressor runs more than described first Preset Time continuously, then described controller judges whether described condenser tube temperature continues to be less than second and preset condenser tube temperature threshold value in the 3rd Preset Time, if continue to be less than second to preset condenser tube temperature threshold value, then described controller obtains the cumulative time of described compressor further, if the described cumulative time is greater than described default cumulative time threshold value, then described controller judges to meet described defrost entry condition.
According to still another embodiment of the invention, if met the following conditions simultaneously, then described controller judges to meet particularization ice-lolly part: D, described condenser tube temperature continue to be less than first and preset condenser tube temperature threshold value in the second Preset Time; E, described accumulative heating operation time are greater than default cumulative time threshold value.
Further, described controller, after judgement meets described particularization ice-lolly part, carries out defrost with the default defrost time.
According to some embodiments of the present invention, if the described defrost time is greater than the default defrost time, or described defrost post-condenser Guan Wen is more than or equal to the 3rd and presets condenser tube temperature threshold value, then the judgement of described controller meets described defrost termination condition.
Accompanying drawing explanation
Fig. 1 is the flow chart of the defrosting control method of mobile air conditioner according to the embodiment of the present invention;
Fig. 2 is the block diagram of the mobile air conditioner according to the embodiment of the present invention;
Fig. 3 is the top view of mobile air conditioner according to an embodiment of the invention; And
Fig. 4 is the front view of mobile air conditioner according to an embodiment of the invention.
Reference numeral:
Condenser pipe 1, compressor 2, temperature detector 3, controller 4, air draft spiral case 5, chassis 6, water level detection switch 7 and water pump 8.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Below with reference to the accompanying drawings defrosting control method and the mobile air conditioner of the mobile air conditioner of the embodiment of the present invention are described.
Fig. 1 is the flow chart of the defrosting control method of mobile air conditioner according to the embodiment of the present invention.As shown in Figure 1, the defrosting control method of this mobile air conditioner comprises the following steps:
S1: the running time and the condenser tube temperature that obtain compressor.
Wherein, the Guan Wen of condenser is detected to obtain condenser tube temperature by the temperature detector be arranged on condenser pipe.Meanwhile, in a heating mode, the first timer can be controlled when compressor start immediately and carry out timing, with to carrying out timing the running time of compressor.
S2: judge whether to meet defrost entry condition according to running time of compressor and condenser tube temperature.
S3: if meet defrost entry condition, then start defrost.
That is, when mobile air conditioner runs in a heating mode, if the running time of compressor and condenser tube temperature meet defrost entry condition, then control mobile air conditioner and enter refrigeration mode, the heat utilizing condenser under refrigeration mode to send carries out defrost.
Particularly, start after defrost, can control cross valve power-off commutation, and control fan and lower blower fan is out of service, corresponding wind guide strip can be closed and also can not be closed, thus avoids blowing cold wind, and control compressor simultaneously and continue to start, mobile air conditioner enters refrigeration mode.More specifically, in cooling mode, low-temperature low-pressure refrigerant can be compressed into high-temperature high-pressure refrigerant steam by compressor, and high-temperature high-pressure refrigerant can be made during cross valve power-off to flow to condenser.Like this, cold-producing medium absorbs the heat of room air by evaporimeter and becomes low-temp low-pressure superheated steam, compressor sucks low-temperature low-pressure refrigerant, and low-temperature low-pressure refrigerant is compressed into the discharge of high-temperature high-pressure refrigerant steam, high-temperature high-pressure refrigerant enters condenser to release heat by cross valve, thus realizes defrost by refrigerating operaton.
S4: obtain the defrost post-condenser pipe gentle defrost time further.
Wherein, by the second timer, timing is carried out to the defrost time.
S5: judge whether to meet defrost termination condition according to the defrost post-condenser pipe gentle defrost time.
S6: if meet defrost termination condition, then terminate defrost.
That is, carry out at mobile air conditioner in the process of defrost, if the defrost post-condenser pipe gentle defrost time meets defrost termination condition, then control mobile air conditioner and recover heating mode.
Particularly, after terminating defrost, leeward machine can be controlled bring into operation, control compressor reducer out of service simultaneously, 4th Preset Time controls cross valve again after such as 40 seconds and switches on power, cross valve is connected the 5th Preset Time and is controlled compressor start again after such as 3 seconds, and control fan simultaneously and start, mobile air conditioner recovers heating mode.More specifically, in a heating mode, low-temperature low-pressure refrigerant can be compressed into high-temperature high-pressure refrigerant steam after compressor start, high-temperature high-pressure refrigerant can be made when cross valve switches on power to flow to evaporimeter, cold-producing medium becomes low-temp low-pressure superheated steam by the heat of condenser absorption chamber outer air, compressor sucks low-temperature low-pressure refrigerant, and low-temperature low-pressure refrigerant is compressed into the discharge of high-temperature high-pressure refrigerant steam, high-temperature high-pressure refrigerant enters evaporimeter with to indoor releasing heat by cross valve, thus realizes heating operation.Wherein, compressor is not by the restriction of 3 minutes delay protections.
Below in the embodiment of the present invention according to judging whether the running time of compressor and condenser tube temperature that meeting defrost entry condition is described in detail.
According to one embodiment of present invention, according to judging whether running time of compressor and condenser tube temperature to meet defrost entry condition and step S2 specifically comprises: if compressor runs the first Preset Time such as more than 8 minutes continuously, then obtain the accumulative heating operation time of compressor further; If met the following conditions simultaneously, then judge to meet defrost entry condition: A, condenser tube temperature T3 and the temperature difference △ T3 preset between maximum condenser tube temperature T3max are more than or equal to default temperature difference threshold value such as 3 degrees Celsius; B, condenser tube temperature T3 continue to be less than first and preset condenser tube temperature threshold value TC3 in the second Preset Time such as 5 minutes; C, accumulative heating operation time t are greater than default cumulative time threshold value such as 45 minutes.
That is, in a heating mode, the first timer can be controlled when compressor start and start timing, with recording compressed machine continuous operating time, after compressor runs 8 minutes continuously, namely after the timing time of the first timer reaches 8 minutes, condenser tube temperature T3 is detected by temperature detector, and record condenser tube temperature T3, and continuation obtains the running time of compressor to obtain the accumulative heating operation time t of compressor, if met the following conditions the running time of condenser tube temperature T3 and compressor afterwards simultaneously, then start defrost: A, △ T3=T3max-T3 >=3 DEG C, it should be noted that, condition A meets and once then thinks that condition A meets always, B, before startup defrost, T3 continues to be less than TC3 in 5 minutes at continuous print, and wherein, TC3 can set according to the practical operation situation of mobile air conditioner, C, t are greater than 45 minutes.
Wherein, accumulative heating operation time t can be the running time of compressor under heating mode, and accumulative heating operation time t also obtains by the timing time of the first timer.Particularly, after the timing time of the first timer reaches the first Preset Time, the first timer proceeds timing, and thus, the first timer can carry out timing to accumulative heating operation time t.
According to another embodiment of the invention, according to judging whether running time of compressor and condenser tube temperature to meet defrost entry condition and step S2 specifically comprises: if compressor runs the first Preset Time such as more than 8 minutes continuously, then judge whether condenser tube temperature T3 continues to be less than second and preset condenser tube temperature threshold value such as-11 degrees Celsius in the 3rd Preset Time; If continue to be less than second to preset condenser tube temperature threshold value, then obtain the accumulative heating operation time of compressor further; If the accumulative heating operation time is greater than default cumulative time threshold value such as 45 minutes, then judge to meet defrost entry condition.
That is, in a heating mode, the first timer can be controlled when compressor start and start timing, with recording compressed machine continuous operating time, after compressor runs 8 minutes continuously, namely after the timing time of the first timer reaches 8 minutes, condenser tube temperature T3 is detected by temperature detector, and record condenser tube temperature T3, afterwards, if T3 continues to be less than-11 degrees Celsius in the 3rd Preset Time, then obtain the accumulative heating operation time t of compressor further, if t is greater than 45 minutes, then start defrost.
Wherein, what need be described is, 3rd Preset Time is less than default cumulative time threshold value, such as, obtain the first accumulative heating operation time of compressor when compressor runs the first Preset Time continuously, the 3rd Preset Time can equal the difference that default cumulative time threshold value deducts the first accumulative heating operation time of compressor.In other words, after compressor runs 8 minutes continuously, and before accumulative heating operation time t reaches 45 minutes, within the above-mentioned time period, condenser tube temperature T3 is less than-11 degrees Celsius, never higher than mistake-11 degrees Celsius always.
According to still another embodiment of the invention, the defrosting control method of mobile air conditioner also comprises: if met the following conditions simultaneously, then judge to meet to become privileged ice-lolly part: D, condenser tube temperature T3 continue to be less than first and preset condenser tube temperature threshold value TC3 in the second Preset Time such as 5 minutes; E, accumulative heating operation time t are greater than default cumulative time threshold value such as 45 minutes.Further, after judgement meets particularization ice-lolly part, defrost was carried out with such as 10 minutes default defrost time.
After powering on first, shutting down again start or switch mode time, judge whether to start defrost according to particularization ice-lolly part.That is, after powering on first, shutting down again start or after switching to heating mode by non-brake method pattern, reset all defrost conditions, namely the running time of recording compressed machine, condenser tube temperature, accumulative heating operation time is restarted, if accumulative heating operation time t reaches more than 45 minutes and T3 continues to be less than TC3 in 5 minutes at continuous print, then start defrost, and the defrost time is 10 minutes.
In addition, need be described, on starting once defrost time, only judge whether the defrost entry condition of other two embodiments meets, cancel the judgement becoming privileged ice-lolly part.In other words, only after powering on first, shutting down again start or switch mode time, judge whether to meet and become privileged ice-lolly part.
Judge whether that meeting defrost termination condition is described in detail in the embodiment of the present invention according to the defrost post-condenser pipe gentle defrost time below.
According to some embodiments of the present invention, judge whether to meet defrost termination condition according to the defrost post-condenser pipe gentle defrost time and step S5 specifically comprises: if the defrost time is greater than default defrost time DT1, then judge to meet defrost termination condition; If or defrost post-condenser pipe temperature T3 ' is more than or equal to the 3rd default condenser tube temperature threshold value Tc2, then judge to meet defrost termination condition.
That is, in defrost process, if any one in meeting the following conditions, then judge to meet defrost termination condition, control mobile air conditioner and proceed to heating mode: F, defrost time reach default defrost time DT1, wherein, presetting defrost time DT1 can according to circumstances set, and is generally taken as 10 minutes; G, T3 ' >=Tc2, wherein, the 3rd presets condenser tube temperature threshold value Tc2 can set according to the actual conditions of refrigeration system in mobile air conditioner.In addition, after judgement meets defrost termination condition, can reset all defrost conditions, namely restart the running time of recording compressed machine, condenser tube temperature, accumulative heating operation time of compressor and defrost time, namely the first timer and the second timer restart timing.
Need be described, in defrost process, if mobile air conditioner breaks down, shuts down or switch to non-heating mode by refrigeration mode, then terminate defrost immediately, and reset all defrost conditions.
In addition, according to some embodiments of the present invention, after startup defrost, the further acquisition defrost post-condenser pipe gentle defrost time, if the defrost time is greater than the 6th Preset Time such as 7 minutes or defrost post-condenser pipe temperature T3 ' is greater than the 4th default condenser tube temperature threshold value such as 40 degrees Celsius, then control lower fan starting, and by the steam of generation outside exhaust duct discharge chamber, until terminate defrost.
According to some embodiments of the present invention, mobile air conditioner also comprises chassis, water level detection switch and water pump, and wherein, water level detection switch is for detecting the water level on chassis, and water pump is connected with chassis by drainpipe, for being extracted out by the water in chassis.Particularly, after startup defrost, water level when chassis reaches preset water level, namely when the water level on chassis reaches the position at water level detection switch place, control starting mode of pump, and control water pump and within such as 90 seconds, draw water with default time of pumping, to control the water level on chassis below preset water level, thus avoid condensed water to overflow chassis.
To sum up, according to the defrosting control method of the mobile air conditioner that the embodiment of the present invention proposes, judge whether to meet defrost entry condition by running time of compressor and condenser tube temperature, thus the shortest running time of regulation compressor, avoid frequent defrost, and ensure that mobile air conditioner is in frostless state in heating operation as far as possible; Judge whether to meet defrost termination condition by the defrost post-condenser pipe gentle defrost time, thus specify the maximum defrost time, avoid defrost overlong time, promote the experience of user.
In order to realize above-described embodiment, the present invention also proposes a kind of mobile air conditioner.
As shown in figs 2-4, this mobile air conditioner comprises: condenser pipe 1, compressor 2, temperature detector 3 and controller 4.In addition, mobile air conditioner also comprises: evaporimeter, fan, lower blower fan, cross valve and air draft spiral case 5, and lower blower fan can be arranged in air draft spiral case 5.
Wherein, temperature detector 3 is for detecting the Guan Wen of condenser pipe 1, and temperature detector 3 can be arranged on condenser pipe 1; Controller 4 is for obtaining running time and the condenser tube temperature of compressor 2, and judge whether to meet defrost entry condition according to running time of compressor 2 and condenser tube temperature, if meet defrost entry condition, then start defrost, and obtain the defrost post-condenser pipe gentle defrost time further, and judge whether to meet defrost termination condition according to the defrost post-condenser pipe gentle defrost time, if meet defrost termination condition, then terminate defrost.
Wherein, in a heating mode, timing is carried out when compressor 2 startup control device 4 can control the first timer immediately, with to carrying out timing the running time of compressor.In addition, also by the second timer, timing is carried out to the defrost time.
That is, when mobile air conditioner runs in a heating mode, if the running time of compressor 2 and condenser tube temperature meet defrost entry condition, then controller 4 controls mobile air conditioner and enters refrigeration mode, and the heat utilizing condenser 1 under refrigeration mode to send carries out defrost.Further, carry out in the process of defrost at mobile air conditioner, if the defrost post-condenser pipe gentle defrost time meets defrost termination condition, then controller 4 controls mobile air conditioner recovery heating mode.
Particularly, after starting defrost, controller 4 can control cross valve power-off commutation, and controlling fan and lower blower fan is out of service, corresponding wind guide strip can be closed and also can not be closed, thus avoids blowing cold wind, control compressor 2 with Time Controller 4 to continue to start, mobile air conditioner enters refrigeration mode.More specifically, in cooling mode, low-temperature low-pressure refrigerant can be compressed into high-temperature high-pressure refrigerant steam by compressor 2, and high-temperature high-pressure refrigerant can be made during cross valve power-off to flow to condenser.Like this, cold-producing medium absorbs the heat of room air by evaporimeter and becomes low-temp low-pressure superheated steam, compressor 2 sucks low-temperature low-pressure refrigerant, and low-temperature low-pressure refrigerant is compressed into the discharge of high-temperature high-pressure refrigerant steam, high-temperature high-pressure refrigerant enters condenser 1 to release heat by cross valve, thus realizes defrost by refrigerating operaton.
After terminating defrost, controller 4 can control leeward machine and bring into operation, control compressor reducer 2 out of service simultaneously, 4th Preset Time controls cross valve again after such as 40 seconds and switches on power, cross valve connection the 5th Preset Time controls compressor 2 again after such as 3 seconds and starts, control fan to start, mobile air conditioner recovers heating mode simultaneously.More specifically, in a heating mode, low-temperature low-pressure refrigerant can be compressed into high-temperature high-pressure refrigerant steam after starting by compressor 2, high-temperature high-pressure refrigerant can be made when cross valve switches on power to flow to evaporimeter, cold-producing medium becomes low-temp low-pressure superheated steam by the heat of condenser absorption chamber outer air, compressor 2 sucks low-temperature low-pressure refrigerant, and low-temperature low-pressure refrigerant is compressed into the discharge of high-temperature high-pressure refrigerant steam, high-temperature high-pressure refrigerant enters evaporimeter with to indoor releasing heat by cross valve, thus realizes heating operation.Wherein, compressor 2 is not by the restriction of 3 minutes delay protections.
Below in the embodiment of the present invention according to judging whether the running time of compressor and condenser tube temperature that meeting defrost entry condition is described in detail.
According to one embodiment of present invention, if compressor runs the first Preset Time such as more than 8 minutes continuously, then controller obtains the accumulative heating operation time of compressor further, if met the following conditions simultaneously, then controller judges to meet defrost entry condition: A, condenser tube temperature T3 and the temperature difference △ T3 preset between maximum condenser tube temperature T3max are more than or equal to default temperature difference threshold value such as 3 degrees Celsius; B, condenser tube temperature T3 continue to be less than first and preset condenser tube temperature threshold value TC3 in the second Preset Time such as 5 minutes; C, accumulative heating operation time t are greater than default cumulative time threshold value such as 45 minutes.
That is, in a heating mode, timing is started when compressor 2 startup control device 4 can control the first timer, with recording compressed machine continuous operating time, after compressor runs 8 minutes continuously, namely after the timing time of the first timer reaches 8 minutes, controller 4 detects condenser tube temperature T3 by temperature detector 3, and record condenser tube temperature T3, and continuation obtains the running time of compressor to obtain the accumulative heating operation time of compressor, if met the following conditions the running time of condenser tube temperature T3 and compressor afterwards simultaneously, then start defrost: A, △ T3=T3max-T3 >=3 DEG C, it should be noted that, condition A meets and once then thinks that condition A meets always, B, before startup defrost, T3 continues to be less than TC3 in 5 minutes at continuous print, and wherein, TC3 can set according to the practical operation situation of mobile air conditioner, C, t are greater than 45 minutes.
Wherein, accumulative heating operation time t can be the running time of compressor under heating mode, certainly, accumulative heating operation time t also obtains by the timing time of the first timer, particularly, after the timing time of the first timer reaches the first Preset Time, timing is proceeded, thus, the first timer can carry out timing to accumulative heating operation time t.
According to another embodiment of the invention, if compressor 2 runs the first Preset Time such as more than 8 minutes continuously, then controller 4 judges whether condenser tube temperature continues to be less than second and preset condenser tube temperature threshold value such as-11 degrees Celsius in the 3rd Preset Time, if continue to be less than second to preset condenser tube temperature threshold value, then controller 4 obtains the accumulative heating operation time of compressor further, if the accumulative heating operation time is greater than default cumulative time threshold value such as 45 minutes, then controller 4 judges to meet defrost entry condition.
That is, in a heating mode, timing is started when compressor 2 startup control device 4 can control the first timer, with recording compressed machine continuous operating time, after compressor runs 8 minutes continuously, namely after the timing time of the first timer reaches 8 minutes, controller 4 detects condenser tube temperature T3 by temperature detector 3, and record condenser tube temperature T3, afterwards, if T3 continues to be less than-11 degrees Celsius in the 3rd Preset Time, then controller 4 obtains the accumulative heating operation time t of compressor further, if t is greater than 45 minutes, then start defrost.
Wherein, what need be described is, 3rd Preset Time is less than default cumulative time threshold value, such as, obtain the first accumulative heating operation time of compressor when compressor runs the first Preset Time continuously, the 3rd Preset Time can equal the difference that default cumulative time threshold value deducts the first accumulative heating operation time of compressor.In other words, after compressor runs 8 minutes continuously, and before accumulative heating operation time t reaches 45 minutes, within the above-mentioned time period, condenser tube temperature T3 is less than-11 degrees Celsius, never higher than mistake-11 degrees Celsius always.
According to still another embodiment of the invention, if met the following conditions simultaneously, then controller 4 judgement satisfied particularization ice-lolly part D, condenser tube temperature T3 continue to be less than the first default condenser tube temperature threshold value TC3 in the second Preset Time such as 5 minutes; E, accumulative heating operation time t are greater than default cumulative time threshold value such as 45 minutes.Further, controller 4, after judgement meets particularization ice-lolly part, carried out defrost with such as 10 minutes default defrost time.
After powering on first, shutting down again start or switch mode time, controller 4 judges whether to start defrost according to particularization ice-lolly part.That is, after powering on first, shutting down again start or after switching to heating mode by non-brake method pattern, reset all defrost conditions, namely the running time of recording compressed machine, condenser tube temperature, accumulative heating operation time is restarted, if accumulative heating operation time t reaches more than 45 minutes and T3 continues to be less than TC3 in 5 minutes at continuous print, then start defrost, and the defrost time is 10 minutes.
In addition, need be described, on starting once defrost time, controller 4 judges whether the defrost entry condition of other two embodiments meets, and cancels the judgement of particularization ice-lolly part.In other words, only after powering on first, shutting down again start or switch mode time, judge whether to meet and become privileged ice-lolly part.
Judge whether that meeting defrost termination condition is described in detail in the embodiment of the present invention according to the defrost post-condenser pipe gentle defrost time below.
According to some embodiments of the present invention, if the defrost time be greater than default defrost time DT1, or defrost post-condenser pipe temperature T3 ' be more than or equal to the 3rd preset condenser tube temperature threshold value Tc2, then controller 4 judgement meet defrost termination condition.
That is, in defrost process, if any one in meeting the following conditions, then controller 4 judges to meet defrost termination condition, control mobile air conditioner and proceed to heating mode: F, defrost time reach default defrost time DT1, wherein, presetting defrost time DT1 can according to circumstances set, and is generally taken as 10 minutes; G, T3 ' >=Tc2, wherein, the 3rd presets condenser tube temperature threshold value Tc2 can set according to the actual conditions of refrigeration system in mobile air conditioner.In addition, controller 4 is after judgement meets defrost termination condition, can reset all defrost conditions, namely restart the running time of recording compressed machine, condenser tube temperature, accumulative heating operation time of compressor and defrost time, namely the first timer and the second timer restart timing.
Need be described, in defrost process, if mobile air conditioner breaks down, shuts down or switch to non-heating mode by refrigeration mode, then terminate defrost immediately, and reset all defrost conditions.
In addition, according to some embodiments of the present invention, after startup defrost, controller 4 obtains the defrost post-condenser pipe gentle defrost time further, if the defrost time is greater than the 6th Preset Time such as 7 minutes or defrost post-condenser pipe temperature T3 ' is greater than the 4th default condenser tube temperature threshold value such as 40 degrees Celsius, then controller 4 controls lower fan starting, and by the steam of generation outside exhaust duct discharge chamber, until terminate defrost.
In addition, as the example of Fig. 3-Fig. 4, mobile air conditioner also comprises chassis 6, water level detection switch 7 and water pump 8, and wherein, water level detection switch 7 is for detecting the water level on chassis 6, and water pump 8 is connected with chassis 6 by drainpipe, for being extracted out by the water in chassis 6.Particularly, after startup defrost, water level when chassis 6 reaches preset water level H, namely when the water level on chassis 6 reaches the position H at water level detection switch 7 place, controller 4 controls water pump 8 and starts, and control water pump 8 and within such as 90 seconds, draw water with default time of pumping, to control the water level on chassis below preset water level, thus avoid condensed water to overflow chassis.
To sum up, according to the mobile air conditioner that the embodiment of the present invention proposes, controller judges whether to meet defrost entry condition by running time of compressor and condenser tube temperature, thus the shortest running time of regulation compressor, avoid frequent defrost, and ensure that mobile air conditioner is in frostless state in heating operation as far as possible; The defrost post-condenser pipe gentle defrost time judges whether to meet defrost termination condition controller excessively all,
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this description, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read-only storage (ROM), erasablely edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk read-only storage (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only storage, disk or CD etc.Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (12)
1. a defrosting control method for mobile air conditioner, is characterized in that, comprises the following steps:
Obtain running time and the condenser tube temperature of compressor;
Judge whether to meet defrost entry condition according to running time of described compressor and condenser tube temperature;
If meet described defrost entry condition, then start defrost;
The further acquisition defrost post-condenser pipe gentle defrost time;
Judge whether to meet defrost termination condition according to the described defrost post-condenser pipe gentle defrost time; And
If meet described defrost termination condition, then terminate defrost.
2. the defrosting control method of mobile air conditioner as claimed in claim 1, it is characterized in that, the described running time according to described compressor and condenser tube temperature judge whether that meeting defrost entry condition specifically comprises:
If described compressor runs more than the first Preset Time continuously, then obtain the accumulative heating operation time of described compressor further;
If met the following conditions simultaneously, then judge to meet described defrost entry condition:
A, described condenser tube temperature and the temperature difference preset between maximum condenser tube temperature are more than or equal to default temperature difference threshold value;
B, described condenser tube temperature continue to be less than first and preset condenser tube temperature threshold value in the second Preset Time;
C, described accumulative heating operation time are greater than default cumulative time threshold value.
3. the defrosting control method of mobile air conditioner as claimed in claim 1, it is characterized in that, the described running time according to described compressor and condenser tube temperature judge whether that meeting defrost entry condition specifically comprises:
If described compressor runs more than described first Preset Time continuously, then judge whether described condenser tube temperature continues to be less than second and preset condenser tube temperature threshold value in the 3rd Preset Time;
If continue to be less than second to preset condenser tube temperature threshold value, then obtain the accumulative heating operation time of described compressor further;
If the described accumulative heating operation time is greater than described default cumulative time threshold value, then judge to meet described defrost entry condition.
4. the defrosting control method of mobile air conditioner as claimed in claim 1, is characterized in that, also comprise:
If met the following conditions simultaneously, then judge to meet to become privileged ice-lolly part:
D, described condenser tube temperature continue to be less than first and preset condenser tube temperature threshold value in the second Preset Time;
E, described accumulative heating operation time are greater than default cumulative time threshold value.
5. the defrosting control method of mobile air conditioner as claimed in claim 4, is characterized in that, after judgement meets described particularization ice-lolly part, carries out defrost with the default defrost time.
6. the defrosting control method of mobile air conditioner as claimed in claim 1, is characterized in that, describedly judges whether that meeting defrost termination condition specifically comprises according to the described defrost post-condenser pipe gentle defrost time:
If the described defrost time is greater than the default defrost time, then judge to meet described defrost termination condition; Or
If described defrost post-condenser Guan Wen is more than or equal to the 3rd preset condenser tube temperature threshold value, then judge to meet described defrost termination condition.
7. a mobile air conditioner, is characterized in that, comprising:
Condenser pipe;
Temperature detector, for detecting the Guan Wen of described condenser pipe;
Compressor;
Controller, for obtaining the running time of described compressor and described condenser tube temperature, and judge whether to meet defrost entry condition according to running time of described compressor and condenser tube temperature, if meet described defrost entry condition, then start defrost, and obtain the defrost post-condenser pipe gentle described defrost time further, and judge whether to meet defrost termination condition according to the described defrost post-condenser pipe gentle defrost time, if meet described defrost termination condition, then terminate defrost.
8. mobile air conditioner as claimed in claim 7, is characterized in that,
If described compressor runs more than the first Preset Time continuously, then described controller obtains the accumulative heating operation time of described compressor further, if met the following conditions simultaneously, then described controller judges to meet described defrost entry condition:
A, described condenser tube temperature and the temperature difference preset between maximum condenser tube temperature are more than or equal to default temperature difference threshold value;
B, described condenser tube temperature continue to be less than first and preset condenser tube temperature threshold value in the second Preset Time;
C, described accumulative heating operation time are greater than default cumulative time threshold value.
9. mobile air conditioner as claimed in claim 7, is characterized in that,
If described compressor runs more than described first Preset Time continuously, then described controller judges whether described condenser tube temperature continues to be less than second and preset condenser tube temperature threshold value in the 3rd Preset Time, if continue to be less than second to preset condenser tube temperature threshold value, then described controller obtains the accumulative heating operation time of described compressor further, if the described accumulative heating operation time is greater than described default cumulative time threshold value, then described controller judges to meet described defrost entry condition.
10. mobile air conditioner as claimed in claim 7, is characterized in that, if met the following conditions simultaneously, then described controller judges to meet particularization ice-lolly part:
D, described condenser tube temperature continue to be less than first and preset condenser tube temperature threshold value in the second Preset Time;
E, described accumulative heating operation time are greater than default cumulative time threshold value.
11. mobile air conditioners as claimed in claim 10, is characterized in that, described controller, after judgement meets described particularization ice-lolly part, carries out defrost with the default defrost time.
12. mobile air conditioners as claimed in claim 7, is characterized in that,
If the described defrost time is greater than the default defrost time, or described defrost post-condenser Guan Wen is more than or equal to the 3rd default condenser tube temperature threshold value, then described controller judges to meet described defrost termination condition.
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