CN104728999B - The antifreeze control method and device of heat exchanger of air conditioner - Google Patents
The antifreeze control method and device of heat exchanger of air conditioner Download PDFInfo
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- CN104728999B CN104728999B CN201310719356.6A CN201310719356A CN104728999B CN 104728999 B CN104728999 B CN 104728999B CN 201310719356 A CN201310719356 A CN 201310719356A CN 104728999 B CN104728999 B CN 104728999B
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of antifreeze control method of heat exchanger of air conditioner and devices.Wherein, the antifreeze control method of the heat exchanger of air conditioner includes：When air conditioner is in heat supply mode, the inlet air temperature of heat exchanger in air conditioner is detected；Detect the leaving air temp of heat exchanger；Judge whether inlet air temperature is less than the first preset temperature；Judge whether leaving air temp is less than the second preset temperature；If it is judged that inlet air temperature is less than the first preset temperature, and leaving air temp is less than the second preset temperature, then starts the anti-frost protection of heat exchanging device.Through the invention, it solves the problems, such as that the antifreeze control of heat exchanger in the prior art is insecure, and then has achieved the effect that the antifreeze control reliability for improving heat exchanger.
Description
Technical field
The present invention relates to field of heat exchangers, in particular to the antifreeze control method and dress of a kind of heat exchanger of air conditioner
It sets.
Background technology
Currently, as civilian, industrial central air-conditioner is fast-developing, the processing procedure of air, the requirement for the treatment of effect are not yet
It is disconnected to improve.It is also more and more for the demand of end packaged air conditioner in central air conditioner system automatically controlled.Heat exchanger is made
For packaged air conditioner temperature adjust core component, so, in the unit with automatic control function, for heat exchanger
Anti-frost protection be also necessary requirement.
At present in the anti-frost protection scheme of unitary air handling unit heat exchanger, usually：Detect heat exchanger coils
Surface temperature, when coil surface temperature is less than 4 DEG C（Other temperature values can be set）When unit automatically into anti-freezing protection mode,
Unit blowing-out machine is controlled, new air-valve is closed, water valve is opened to the maximum, display alarm.If coil surface temperature is gone up to 15 DEG C（It can
The other temperature values of setting）When above, anti-freezing protection mode is exited.
Inventor has found, when being protected to coil pipe using said program, due to the limitation of coil arrangement, can not accurately examine
The surface temperature of coil pipe is surveyed, in addition, running environment and the temperature of extraneous air can not be considered in detection process, above-mentioned multiple originals
Because causing the antifreeze control of heat exchanger unreliable.
For the insecure problem of antifreeze control of heat exchanger in the prior art, effective solution side is not yet proposed at present
Case.
Invention content
The main purpose of the present invention is to provide a kind of antifreeze control method of heat exchanger of air conditioner and devices, existing to solve
There is the insecure problem of antifreeze control of heat exchanger in technology.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of antifreeze control of heat exchanger of air conditioner
Method processed.The antifreeze control method of heat exchanger according to the present invention includes：When air conditioner is in heat supply mode, air conditioner is detected
The inlet air temperature of middle heat exchanger；Detect the leaving air temp of heat exchanger；Judge whether inlet air temperature is less than the first preset temperature；Judge
Whether leaving air temp is less than the second preset temperature；If it is judged that inlet air temperature is less than the first preset temperature, and leaving air temp is small
In the second preset temperature, then start the anti-frost protection of heat exchanging device.
Further, after the anti-frost protection for starting heat exchanging device, antifreeze control method further includes：Detect leaving air temp
Whether the second preset temperature is more than；And if detecting that leaving air temp is more than the second preset temperature, close heat exchanging device
Anti-frost protection.
Further, judge leaving air temp whether less than the second preset temperature include：Judge leaving air temp whether predetermined
Continuously less than the second preset temperature in time；If it is judged that inlet air temperature is less than the first preset temperature, and leaving air temp is small
In the second preset temperature, then starting anti-freezing protection mode includes：If it is judged that inlet air temperature is less than the first preset temperature, and
Leaving air temp then starts the anti-frost protection of heat exchanging device in the given time continuously less than the second preset temperature.
Further, judge whether inlet air temperature is less than after the first preset temperature, antifreeze control method further includes：Sentencing
Break inlet air temperature more than the first preset temperature when, control air conditioner run in the normal mode.
Further, judge whether leaving air temp is less than after the second preset temperature, antifreeze control method further includes：Sentencing
Break leaving air temp more than the second preset temperature when, control air conditioner run in the normal mode.
Further, the anti-frost protection for starting heat exchanging device includes starting following any one or more actions：Stop from
Heart fan operation；Close new air-valve and air returning valve；Surface cooler water valve is opened to the maximum；And output warning message.
To achieve the goals above, according to another aspect of the present invention, a kind of antifreeze control of heat exchanger of air conditioner is provided
Device processed.The freezing protection control device of heat exchanger according to the present invention includes：First detection unit, for being in heat supply in air conditioner
When pattern, the inlet air temperature of heat exchanger in air conditioner is detected；Second detection unit, the leaving air temp for detecting heat exchanger；The
One judging unit, for judging whether inlet air temperature is less than the first preset temperature；Second judgment unit, for judging leaving air temp
Whether the second preset temperature is less than；Start unit, for judging that inlet air temperature is less than the first preset temperature, and leaving air temp
When less than the second preset temperature, start the anti-frost protection of heat exchanging device.
Further, freezing protection control device further includes：Third detection unit, in the anti-frost protection for starting heat exchanging device
Later, whether detection leaving air temp is more than the second preset temperature；And closing unit, for detecting that leaving air temp is more than the
When two preset temperatures, the anti-frost protection of heat exchanging device is closed.
Further, second judgment unit is additionally operable to judge whether leaving air temp is pre- continuously less than second in the given time
If temperature；Start unit is used to judge inlet air temperature less than the first preset temperature, and leaving air temp is in the given time
When continuously less than the second preset temperature, start the anti-frost protection of heat exchanging device.
Further, freezing protection control device further includes：First control unit, for judging inlet air temperature more than first
When preset temperature, control air conditioner is run in the normal mode.
Further, freezing protection control device further includes：Second control unit, for judging leaving air temp whether less than the
After two preset temperatures, when judging that leaving air temp is more than the second preset temperature, control air conditioner is run in the normal mode.
Through the invention, using when air conditioner is in heat supply mode, detect heat exchanger in the air conditioner into wind-warm syndrome
Degree；Detect the leaving air temp of the heat exchanger；Judge whether the inlet air temperature is less than the first preset temperature；Judge the outlet air
Whether temperature is less than the second preset temperature；If it is judged that the inlet air temperature be less than first preset temperature, and it is described go out
Air temperature is less than second preset temperature, then starts the anti-frost protection to the heat exchanger, solve and exchange heat in the prior art
The insecure problem of antifreeze control of device, and then achieved the effect that the antifreeze control reliability for improving heat exchanger.
Description of the drawings
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the antifreeze control method of heat exchanger of air conditioner according to a first embodiment of the present invention；
Fig. 2 is the flow chart of the antifreeze control method of heat exchanger of air conditioner according to a second embodiment of the present invention；
Fig. 3 is the flow chart of the antifreeze control method of heat exchanger of air conditioner according to a third embodiment of the present invention；
Fig. 4 is the schematic diagram of the freezing protection control device of heat exchanger of air conditioner according to a first embodiment of the present invention；And
Fig. 5 is the schematic diagram of the freezing protection control device of heat exchanger of air conditioner according to a second embodiment of the present invention.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work should all belong to the model that the present invention protects
It encloses.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that using in this way
Data can be interchanged in the appropriate case, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
It includes to be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment to cover non-exclusive
Those of clearly list step or unit, but may include not listing clearly or for these processes, method, product
Or the other steps or unit that equipment is intrinsic.
An embodiment of the present invention provides a kind of antifreeze control methods of heat exchanger of air conditioner.
Fig. 1 is the flow chart of the antifreeze control method of heat exchanger of air conditioner according to a first embodiment of the present invention.As schemed
Show, the antifreeze control method of the heat exchanger of air conditioner includes the following steps：
Step S102 detects the inlet air temperature of heat exchanger in air conditioner when air conditioner is in heat supply mode.
For the ease of the understanding of the specific embodiment to inventive embodiments, the heat exchanger in lower air conditioner is introduced first
Operation principle.
Heat exchanger in air conditioner sucks fresh air, indoor, the air after release heating is sent into after being heated to fresh air, then air-conditioning
Device is heating mode, is indoor heating.Heat exchanger in air conditioner sucks fresh air, indoor to being sent into after fresh air cooling, release drop
Air after temperature, then air conditioner is refrigeration mode.
When air conditioner is in heat supply mode, it is meant that air themperature is relatively low, and air conditioner heat supply is needed to warm oneself, therefore,
Air conditioner, which is in, to be judged whether to need when heat supply to carry out anti-frost protection to the heat exchanger in air conditioner, can be avoided frequently detecting and be changed
Whether hot device needs to carry out anti-frost protection, saves the energy consumption of air conditioner.
The inlet air temperature of heat exchanger is the temperature of the fresh air sucked, can be simply interpreted as from the air of outdoor sucking
Temperature.Therefore, when air conditioner is in heat supply mode, the inlet air temperature of heat exchanger in air conditioner is detected.
Step S104 detects the leaving air temp of heat exchanger.
The fresh air that the leaving air temp of heat exchanger will suck is after the heating of heat exchanger, from the air of heat exchanger release
Temperature.Due to only can just consider whether to start the anti-frost protection of heat exchanging device, going out herein when air conditioner heat-production
Air temperature only considers the temperature of the outlet air after heat exchanger heating.
Step S106, judges whether inlet air temperature is less than the first preset temperature.
Judge inlet air temperature whether be less than the first preset temperature can judge outside air temperature, if inlet air temperature compared with
It is low, then mean that outside air temperature is relatively low, when outside air temperature is relatively low, possible heat exchanging device damages, and needs at this time
Judge whether the anti-frost protection of startup heat exchanging device.
The value range of first preset temperature can be 1 DEG C~6 DEG C, preferably 3 DEG C.
Step S108, judges whether leaving air temp is less than the second preset temperature.
Only consider inlet air temperature to determine whether the anti-frost protection for starting heat exchanging device to be likely to result in judging result inaccurate
Really, start anti-frost protection when need not carry out anti-frost protection, be unable to operate normally so as to cause air conditioner.
The value range of second preset temperature can be 8 DEG C~12 DEG C, preferably 10 DEG C.
Step S110, if it is judged that inlet air temperature is less than the first preset temperature, and leaving air temp is less than the second default temperature
Degree, then start the anti-frost protection of heat exchanging device.
If it is judged that inlet air temperature is less than the first preset temperature, it is determined that outdoor temperature is relatively low, may cause heat exchanger
Damage, if it is judged that leaving air temp be less than the second preset temperature, it is determined that through heating after air themperature also locate
In lower temperature, the damage of heat exchanger may be caused at this time, therefore, in order to ensure that heat exchanger from damage, starts heat exchanging device
Anti-frost protection.
By detecting inlet air temperature and leaving air temp, inlet air temperature is being judged less than the first preset temperature, and go out wind-warm syndrome
When degree is less than the second preset temperature, starts the anti-frost protection of heat exchanging device, can more accurately judge the inside temperature of heat exchanger
Degree avoids the occurrence of error protection, improves the reliable of heat exchanging device anti-frost protection so that it is determined that heat exchanging device starts anti-frost protection
Property.
Fig. 2 is the flow chart of the antifreeze control method of heat exchanger of air conditioner according to a second embodiment of the present invention.As schemed
Show, the antifreeze control method of the heat exchanger of air conditioner includes the following steps：
Step S202 detects the inlet air temperature of heat exchanger in air conditioner when air conditioner is in heat supply mode；
Step S204 detects the leaving air temp of heat exchanger；
Step S206, judges whether inlet air temperature is less than the first preset temperature；
Step S208, judges whether leaving air temp is less than the second preset temperature；
Step S210, if it is judged that inlet air temperature is less than the first preset temperature, and leaving air temp is less than the second default temperature
Degree, then start the anti-frost protection of heat exchanging device.
Above-mentioned steps S202 to step S210 is identical as the content of step S102 to step S110 shown in FIG. 1, herein not
It repeats.After the anti-frost protection for starting heat exchanging device, which further includes following steps：
Whether step S212, detection leaving air temp are more than the second preset temperature.
Step S214 closes the anti-frost protection of heat exchanging device if detecting that leaving air temp is more than the second preset temperature.
After the anti-frost protection for starting heat exchanging device, whether detection leaving air temp is more than the second preset temperature, if inspection
Measure leaving air temp and be more than the second preset temperature, air themperature at this time will not heat exchanging device damage, heat exchanger does not need
Anti-frost protection then closes the anti-frost protection of heat exchanging device.
Start anti-frost protection when needing to carry out anti-frost protection, the closing pair when need not carry out anti-frost protection
The anti-frost protection of heat exchanger can save the energy consumption of heat exchanger, ensure that air-conditioning is run in normal condition.
Preferably, in order to more accurately judge whether to need start anti-freezing protection mode, judge leaving air temp whether
Continuously less than the second preset temperature in predetermined time.If it is judged that inlet air temperature is less than the first preset temperature, and go out wind-warm syndrome
Degree then starts the anti-frost protection of heat exchanging device in the given time continuously less than the second preset temperature.
If there is temperature jump in the course of work of heat exchanger, may result in whether starting the mistake of anti-frost protection
Sentence, influence the normal work of air conditioner, therefore, when judging whether leaving air temp is less than the second preset temperature, judges wind-warm syndrome
Whether degree is in the given time continuously less than the second preset temperature, if it is judged that inlet air temperature is less than the first preset temperature, and
Leaving air temp continuously less than the second preset temperature, then starts the anti-frost protection of heat exchanging device in preset time.Preset time
Value range can be 8~12s, preferably 10s.
By judge leaving air temp whether in preset time continuously less than the second preset temperature, there is temperature in heat exchanger
When mutation, anti-frost protection caused by capable of overcoming temperature jump is judged by accident, to improve the reliability of heat exchanging device anti-frost protection.
Further, judge whether inlet air temperature is less than after the first preset temperature, antifreeze control method further includes：Sentencing
Break inlet air temperature more than the first preset temperature when, control air conditioner run in the normal mode.
If it is judged that inlet air temperature is more than the first preset temperature, it is meant that air themperature is not enough to cause heat exchanging device
Damage, need not start anti-frost protection, and control air conditioner is run in the normal mode.
Further, judge whether leaving air temp is less than after the second preset temperature, antifreeze control method further includes：Sentencing
Break leaving air temp more than the second preset temperature when, control air conditioner run in the normal mode.
If it is judged that inlet air temperature is more than the second preset temperature, it is meant that be not yet in by the leaving air temp of heat exchanger
Reduced levels, air themperature are not enough to cause the damage of heat exchanging device, need not start anti-frost protection, control air conditioner is normal
It is run under pattern.
Further, the anti-frost protection for starting heat exchanging device includes starting following any one or more actions：Stop from
Heart fan operation closes new air-valve and air returning valve, opens to the maximum and export warning message by surface cooler water valve.
When starting the anti-frost protection of heat exchanging device, start any one above-mentioned or multiple actions, to protect heat exchanger
From damage, meanwhile, air conditioner is in operating status.If when starting anti-freezing protection mode, at the centrifugal blower of air conditioner
In manual mode, then centrifugal blower is switched to automatic mode automatically, and it is out of service to automatically control centrifugal blower.
Since air conditioner is in operating status, it is more than the second preset temperature in the leaving air temp for detecting air conditioner
When, close the anti-frost protection of heat exchanging device so that air conditioner can restore normal operation automatically.
After closing anti-frost protection, centrifugal blower is opened, 30S opens new air-valve to preset value after centrifugal blower is opened, and makes
Normal operation can be restored by obtaining air conditioner.
If simultaneously various faults occur for air conditioner, the anti-frost protection of heat exchanging device is highest priority, is started first
The anti-frost protection of heat exchanging device.
The specific implementation mode of the embodiment of the present invention is illustrated below in conjunction with the specific example in Fig. 3, needs to illustrate
, technical scheme of the present invention is not limited to the specific example in Fig. 3, and Fig. 3 solely for the purpose of illustration, is not intended to limit the present invention
Technical solution embodiment only shown in Fig. 3 protection domain within.
Step S302, air conditioner booting.
Whether step S304, detection air conditioner are held in heat supply mode if detecting that air conditioner is in heat supply mode
Row step S306 runs antifreeze detection program, generally starts the antifreeze detection program after air conditioner is switched on 30s, to ensure sky
Adjust device stable operation.If detecting that air conditioner is in non-heat supply mode, S316 is thened follow the steps, heat exchanging device does not carry out antifreeze
Protection.
Step S308 detects new air temperature, and judges whether new air temperature is less than 3 DEG C, if it is judged that new air temperature is small
In 3 DEG C, S310 is thened follow the steps, detects leaving air temp.If it is judged that new air temperature is more than 3 DEG C, S316 is thened follow the steps, no
Heat exchanging device carries out anti-frost protection.
Step S312, judges whether leaving air temp continues 10s and be less than 10 DEG C, if it is judged that continue 10s low for leaving air temp
In 10 DEG C, S314 is thened follow the steps, heat exchanging device carries out anti-frost protection, is less than if it is judged that leaving air temp does not continue 10s
10 DEG C, then follow the steps S316.
Step S314, heat exchanging device execute heat exchange protection, the relevant action of execution include start it is following any one or it is more
A action：Stop centrifugal blower operation, closes new air-valve and air returning valve, surface cooler water valve is opened to the maximum and exported warning message
In conclusion through the embodiment of the present invention, it can be by detecting inlet air temperature and leaving air temp, whether accurate judgement
The anti-frost protection for starting heat exchanging device, considers air themperature and the running environment of air-conditioning, solves and change in the prior art
The insecure problem of antifreeze control of hot device, and then achieved the effect that the antifreeze control reliability for improving heat exchanger.
The freezing protection control device that the antifreeze control method of the embodiment of the present invention can be provided through the embodiment of the present invention comes
It executes, the freezing protection control device of the embodiment of the present invention can be used for executing the antifreeze controlling party that the embodiment of the present invention is provided
Method.
The embodiment of the present invention additionally provides a kind of freezing protection control device of heat exchanger of air conditioner.
Fig. 4 is the schematic diagram of the freezing protection control device of heat exchanger of air conditioner according to a first embodiment of the present invention.As schemed
Show, which includes first detection unit 10, second detection unit 20, the first judging unit 30, second judgement list
Member 40 and start unit 50.
First detection unit 10 is used for when air conditioner be in heat supply mode, heat exchanger into wind-warm syndrome in detection air conditioner
Degree.
For the ease of the understanding of the specific embodiment to inventive embodiments, the heat exchanger in lower air conditioner is introduced first
Operation principle.
Heat exchanger in air conditioner sucks fresh air, indoor, the air after release heating is sent into after being heated to fresh air, then air-conditioning
Device is heating mode, is indoor heating.Heat exchanger in air conditioner sucks fresh air, indoor to being sent into after fresh air cooling, release drop
Air after temperature, then air conditioner is refrigeration mode.
When air conditioner is in heat supply mode, it is meant that air themperature is relatively low, and air conditioner heat supply is needed to warm oneself, therefore,
Air conditioner, which is in, to be judged whether to need when heat supply to carry out anti-frost protection to the heat exchanger in air conditioner, can be avoided frequently detecting and be changed
Whether hot device needs to carry out anti-frost protection, saves the energy consumption of air conditioner.
The inlet air temperature of heat exchanger is the temperature of the fresh air sucked, can be simply interpreted as from the air of outdoor sucking
Temperature.Therefore, first detection unit 10 is used for when air conditioner be in heat supply mode, heat exchanger into wind-warm syndrome in detection air conditioner
Degree.
Second detection unit 20 is used to detect the leaving air temp of heat exchanger.
The fresh air that the leaving air temp of heat exchanger will suck is after the heating of heat exchanger, from the air of heat exchanger release
Temperature.Due to only can just consider whether to start the anti-frost protection of heat exchanging device, going out herein when air conditioner heat-production
Air temperature only considers the temperature of the outlet air after heat exchanger heating.
First judging unit 30 is for judging whether inlet air temperature is less than the first preset temperature.
Judge inlet air temperature whether be less than the first preset temperature can judge outside air temperature, if inlet air temperature compared with
It is low, then mean that outside air temperature is relatively low, when outside air temperature is relatively low, possible heat exchanging device damages, and needs at this time
Judge whether the anti-frost protection of startup heat exchanging device.
The value range of first preset temperature can be 1 DEG C~6 DEG C, preferably 3 DEG C.
Second judgment unit 40 is for judging whether leaving air temp is less than the second preset temperature.
Only consider inlet air temperature to determine whether the anti-frost protection for starting heat exchanging device to be likely to result in judging result inaccurate
Really, start anti-frost protection when need not carry out anti-frost protection, be unable to operate normally so as to cause air conditioner.
The value range of second preset temperature can be 8 DEG C~12 DEG C, preferably 10 DEG C.
Start unit 50 is used to judge inlet air temperature less than the first preset temperature, and leaving air temp is less than second and presets
When temperature, start the anti-frost protection of heat exchanging device.
If it is judged that inlet air temperature is less than the first preset temperature, it is determined that outdoor temperature is relatively low, may cause heat exchanger
Damage, if it is judged that leaving air temp be less than the second preset temperature, it is determined that through heating after air themperature also locate
In lower temperature, the damage of heat exchanger may be caused at this time, therefore, in order to ensure that heat exchanger from damage, starts heat exchanging device
Anti-frost protection.
By detecting inlet air temperature and leaving air temp, inlet air temperature is being judged less than the first preset temperature, and go out wind-warm syndrome
When degree is less than the second preset temperature, starts the anti-frost protection of heat exchanging device, can more accurately judge the inside temperature of heat exchanger
Degree avoids the occurrence of error protection, improves the reliable of heat exchanging device anti-frost protection so that it is determined that heat exchanging device starts anti-frost protection
Property.
Fig. 5 is the schematic diagram of the freezing protection control device of heat exchanger of air conditioner according to a second embodiment of the present invention.As schemed
Show, which includes first detection unit 10, second detection unit 20, the first judging unit 30, second judgement list
Member 40 and start unit 50, further include third detection unit 60 and closing unit 70.Wherein, first detection unit 10, second is examined
Survey the first detection of unit 20, the first judging unit 30, second judgment unit 40 and start unit 50 as shown in figure 3 in embodiment
Unit 10, second detection unit 20, the first judging unit 30, second judgment unit 40 are identical with 50 function of start unit, herein
It does not repeat.
Third detection unit 60 is used for after the anti-frost protection for starting heat exchanging device, and whether detection leaving air temp is more than the
Two preset temperatures.
Closing unit 70 is used to, when detecting that leaving air temp is more than the second preset temperature, close the antifreeze guarantor of heat exchanging device
Shield.
For third detection unit 60 after the anti-frost protection for starting heat exchanging device, it is pre- whether detection leaving air temp is more than second
If temperature, if detecting that leaving air temp is more than the second preset temperature, air themperature at this time will not heat exchanging device damage,
Heat exchanger does not need anti-frost protection, then closes the anti-frost protection of heat exchanging device.
Start anti-frost protection when needing to carry out anti-frost protection, when need not carry out anti-frost protection, closes
Unit 70 closes the anti-frost protection of heat exchanging device, can save the energy consumption of heat exchanger, ensures that air-conditioning is run in normal condition.
Preferably, in order to more accurately judge whether to need to start anti-freezing protection mode, second judgment unit 40 is also used
In judging leaving air temp whether in the given time continuously less than the second preset temperature.Start unit 50 is for judging to enter the wind
Temperature be less than the first preset temperature, and leaving air temp in the given time continuously less than the second preset temperature when, start exchange
The anti-frost protection of hot device.
If there is temperature jump in the course of work of heat exchanger, may result in whether starting the mistake of anti-frost protection
Sentence, influence the normal work of air conditioner, therefore, when judging whether leaving air temp is less than the second preset temperature, judges wind-warm syndrome
Whether degree is in the given time continuously less than the second preset temperature, if it is judged that inlet air temperature is less than the first preset temperature, and
Leaving air temp continuously less than the second preset temperature, then starts the anti-frost protection of heat exchanging device in preset time.Preset time
Value range can be 8~12s, preferably 10s.
By second judgment unit 40 judge leaving air temp whether in preset time continuously less than the second preset temperature,
When temperature jump occurs in heat exchanger, anti-frost protection caused by capable of overcoming temperature jump is judged by accident, anti-to improve heat exchanging device
Freeze the reliability of protection.
Further, which further includes：First control unit, for judging that inlet air temperature is more than the
When one preset temperature, control air conditioner is run in the normal mode.
If it is judged that inlet air temperature is more than the first preset temperature, it is meant that air themperature is not enough to cause heat exchanging device
Damage, need not start anti-frost protection, and control air conditioner is run in the normal mode.
Further, which further includes：Second control unit, for judging whether leaving air temp is less than
After second preset temperature, when judging that leaving air temp is more than the second preset temperature, control air conditioner is run in the normal mode.
If it is judged that inlet air temperature is more than the second preset temperature, it is meant that be not yet in by the leaving air temp of heat exchanger
Reduced levels, air themperature are not enough to cause the damage of heat exchanging device, need not start anti-frost protection, control air conditioner is normal
It is run under pattern.
Further, the anti-frost protection that start unit 50 starts heat exchanging device includes any one or more dynamic below starting
Make：Stop centrifugal blower operation, closes new air-valve and air returning valve, surface cooler water valve is opened to the maximum and exported warning message.
When starting the anti-frost protection of heat exchanging device, start any one above-mentioned or multiple actions, to protect heat exchanger
From damage, meanwhile, air conditioner is in operating status.If when starting anti-freezing protection mode, at the centrifugal blower of air conditioner
In manual mode, then centrifugal blower is switched to automatic mode automatically, and it is out of service to automatically control centrifugal blower.
Since air conditioner is in operating status, it is more than the second preset temperature in the leaving air temp for detecting air conditioner
When, close the anti-frost protection of heat exchanging device so that air conditioner can restore normal operation automatically.
After closing anti-frost protection, centrifugal blower is opened, 30S opens new air-valve to preset value after centrifugal blower is opened, and makes
Normal operation can be restored by obtaining air conditioner.
If simultaneously various faults occur for air conditioner, the anti-frost protection of heat exchanging device is highest priority, is started first
The anti-frost protection of heat exchanging device.
In conclusion through the embodiment of the present invention, it can be by detecting inlet air temperature and leaving air temp, whether accurate judgement
The anti-frost protection for starting heat exchanging device, considers air themperature and the running environment of air-conditioning, solves and change in the prior art
The insecure problem of antifreeze control of hot device, and then achieved the effect that the antifreeze control reliability for improving heat exchanger.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of antifreeze control method of heat exchanger of air conditioner, the heat exchanger after being heated to the fresh air of sucking for being sent into
Interior is the indoor heating, which is characterized in that including：
When air conditioner is in heat supply mode, the inlet air temperature of heat exchanger described in the air conditioner is detected；
The leaving air temp of heat exchanger when detecting the air conditioner under the heat supply mode；
Judge whether the inlet air temperature is less than the first preset temperature；
Judge whether the leaving air temp is less than the second preset temperature；
If it is judged that the inlet air temperature is less than first preset temperature, and the leaving air temp is less than described second and presets
Temperature then starts the anti-frost protection to the heat exchanger；
Wherein, when the air conditioner is in the heat supply mode, start anti-freeze detection after the air conditioner is switched on 30 seconds
Program.
2. antifreeze control method according to claim 1, which is characterized in that starting the anti-frost protection to the heat exchanger
Later, the antifreeze control method further includes：
Detect whether the leaving air temp is more than second preset temperature；And
If detecting that the leaving air temp is more than second preset temperature, the anti-frost protection to the heat exchanger is closed.
3. antifreeze control method according to claim 1, which is characterized in that
Judge the leaving air temp whether less than second preset temperature include：Judge the leaving air temp whether in pre- timing
In continuously less than second preset temperature；
If it is judged that the inlet air temperature is less than first preset temperature, and the leaving air temp is less than described second in advance
If temperature, then starting anti-freezing protection mode includes：If it is judged that the inlet air temperature is less than first preset temperature, and
The leaving air temp continuously less than second preset temperature, then starts to the antifreeze of the heat exchanger within the predetermined time
Protection.
4. antifreeze control method according to claim 1, which is characterized in that judge whether the inlet air temperature is less than first
After preset temperature, the antifreeze control method further includes：
When judging that the inlet air temperature is more than first preset temperature, controls the air conditioner and transport in the normal mode
Row.
5. antifreeze control method according to claim 1, which is characterized in that judge whether the leaving air temp is less than second
After preset temperature, the antifreeze control method further includes：
When judging that the leaving air temp is more than second preset temperature, controls the air conditioner and transport in the normal mode
Row.
6. antifreeze control method according to claim 1, which is characterized in that start the anti-frost protection packet to the heat exchanger
Include the following any one or more actions of startup：
Stop centrifugal blower operation；
Close new air-valve and air returning valve；
Surface cooler water valve is opened to the maximum；And
Export warning message.
7. a kind of freezing protection control device of heat exchanger of air conditioner, the heat exchanger after being heated to the fresh air of sucking for being sent into
Interior is the indoor heating, which is characterized in that
First detection unit, for when air conditioner is in heat supply mode, detecting the air inlet of heat exchanger described in the air conditioner
Temperature；
Second detection unit, the leaving air temp of heat exchanger when for detecting the air conditioner under the heat supply mode；
First judging unit, for judging whether the inlet air temperature is less than the first preset temperature；
Second judgment unit, for judging whether the leaving air temp is less than the second preset temperature；
Start unit, for judging the inlet air temperature less than first preset temperature, and the leaving air temp is less than
When second preset temperature, start the anti-frost protection to the heat exchanger；
Wherein, when the air conditioner is in the heat supply mode, start anti-freeze detection after the air conditioner is switched on 30 seconds
Program.
8. freezing protection control device according to claim 7, which is characterized in that the freezing protection control device further includes：
Third detection unit, for after starting to the anti-frost protection of the heat exchanger, whether big detecting the leaving air temp
In second preset temperature；And
Closing unit, for when detecting that the leaving air temp is more than second preset temperature, closing to the heat exchanger
Anti-frost protection.
9. freezing protection control device according to claim 7, which is characterized in that
The second judgment unit is additionally operable to judge whether the leaving air temp is pre- continuously less than described second in the given time
If temperature；
The start unit is used to judge that the inlet air temperature is less than first preset temperature, and the leaving air temp
When within the predetermined time continuously less than second preset temperature, start the anti-frost protection to the heat exchanger.
10. freezing protection control device according to claim 7, which is characterized in that the freezing protection control device further includes：
First control unit, for when judging that the inlet air temperature is more than first preset temperature, controlling the air-conditioning
Device is run in the normal mode.
11. freezing protection control device according to claim 7, which is characterized in that the freezing protection control device further includes：
Second control unit, for judge the leaving air temp whether be less than the second preset temperature after, judge described in go out
When air temperature is more than second preset temperature, controls the air conditioner and run in the normal mode.
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| CN201310719356.6A CN104728999B (en) | 2013-12-23 | 2013-12-23 | The antifreeze control method and device of heat exchanger of air conditioner |
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| CN201310719356.6A CN104728999B (en) | 2013-12-23 | 2013-12-23 | The antifreeze control method and device of heat exchanger of air conditioner |
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| CN104728999B true CN104728999B (en) | 2018-07-17 |
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