CN104748306B - The antifreeze method and device of monoblock in air-conditioning system - Google Patents
The antifreeze method and device of monoblock in air-conditioning system Download PDFInfo
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- CN104748306B CN104748306B CN201510130967.6A CN201510130967A CN104748306B CN 104748306 B CN104748306 B CN 104748306B CN 201510130967 A CN201510130967 A CN 201510130967A CN 104748306 B CN104748306 B CN 104748306B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
-
- 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
Abstract
The invention discloses the antifreeze method and devices of monoblock in a kind of air-conditioning system, are related to air-conditioning technical field, the method includes：The water inlet hydraulic pressure value and water outlet hydraulic pressure value of acquiring unit unit；Judge whether the absolute value of the difference of the water inlet hydraulic pressure value and water outlet hydraulic pressure value is less than preset pressure threshold value；When the absolute value is less than the preset pressure threshold value, alarm is carried out.The present invention passes through when the absolute value of the difference of water inlet hydraulic pressure value and water outlet hydraulic pressure value is less than preset pressure threshold value; carry out alarm; monoblock is avoided to be run and freezing water-side heat under severe working condition; to in the case of not adding unit unit great amount of cost; it easily realizes the anti-frost protection to monoblock, prevents entire monoblock from damaging and can not run.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to the antifreeze method and device of monoblock in a kind of air-conditioning system.
Background technology
In the region that water resource is abundant, present more and more clients select using water and refrigerant as the air-conditioning system of heat transferring medium
It unites to meet the needs to freezing and heating, the convenient saving operating cost again of such air-conditioning system i.e. water intaking.
Air-conditioning system includes monoblock, and monoblock generally includes a water-side heat, and or parallel connection set
Set that (i.e. the water inlet of water-side heat is connected with the water inlet of monoblock, and the water outlet of water-side heat is and unit machine
The water outlet of group is connected) multiple water-side heats, water-side heat is important refrigeration accessory, sometimes due to monoblock
, often there is water-side heat package and change in the reasons such as water system design is lack of standardization when design protection measure is bad and project installation
In heat pipe since water flow is less than normal so that evaporating pressure is too low and frozen, cause the ice that coolant media heat exchanger tube is frozen by
It presses and swarms in, eventually make to leak in refrigeration system and scaling loss compressor causes damages, therefore, the anti-frost protection of monoblock is very heavy
It wants, but usually requires the great amount of cost of adding unit unit in anti-frost protection mode in the prior art, and or anti-frost protection
Mode is complicated, is not easy to realize.
Invention content
In view of the above problems, it is proposed that the present invention overcoming the above problem in order to provide one kind or solves at least partly
State the antifreeze method and device of monoblock in a kind of air-conditioning system of problem.
One side according to the present invention provides a kind of antifreeze method of monoblock in air-conditioning system, the method includes：
The water inlet hydraulic pressure value and water outlet hydraulic pressure value of acquiring unit unit；
Judge whether the absolute value of the difference of the water inlet hydraulic pressure value and water outlet hydraulic pressure value is less than preset pressure threshold value；
When the absolute value is less than the preset pressure threshold value, alarm is carried out.
Optionally, the method further includes：
The water inlet water temperature value and water outlet water temperature value of acquiring unit unit；
Judge whether the absolute value of the difference of the water inlet water temperature value and water outlet water temperature value is more than preset temperature threshold；
When the absolute value is more than the preset temperature threshold, alarm is carried out.
Optionally, the carry out alarm, further comprises：
The air-conditioning system is subjected to shutdown processing, and carries out alarm.
Optionally, before the water inlet hydraulic pressure value of the acquiring unit unit and water outlet hydraulic pressure value, the method is also wrapped
It includes：
When the air-conditioning system is switched on, the water inlet hydraulic pressure value and water outlet hydraulic pressure value of the acquiring unit unit are executed
The step of.
Optionally, before the water inlet hydraulic pressure value of the acquiring unit unit and water outlet hydraulic pressure value, the method is also wrapped
It includes：
After the air-conditioning system runs preset time, water inlet hydraulic pressure value and the water outlet of the acquiring unit unit are executed
The step of mouth hydraulic pressure value.
Another aspect according to the present invention provides monoblock defroster in a kind of air-conditioning system, described device packet
It includes：
Pressure acquiring unit is used for the water inlet hydraulic pressure value and water outlet hydraulic pressure value of acquiring unit unit；
Whether pressure judging unit, the absolute value of the difference for judging the water inlet hydraulic pressure value and water outlet hydraulic pressure value are small
In preset pressure threshold value；
Pressure alarm unit, for when the absolute value is less than the preset pressure threshold value, carrying out alarm.
Optionally, described device further includes：
Temperature acquiring unit is used for the water inlet water temperature value and water outlet water temperature value of acquiring unit unit；
Whether temperature judging unit, the absolute value of the difference for judging the water inlet water temperature value and water outlet water temperature value are big
In preset temperature threshold；
Temperature alarming unit, for when the absolute value is more than the preset temperature threshold, carrying out alarm.
Optionally, the temperature alarming unit is further used for the air-conditioning system carrying out shutdown processing, and is reported
Alert prompt.
Optionally, described device further includes：
First trigger element, for when the air-conditioning system is switched on, calling the pressure acquiring unit.
Optionally, described device further includes：
Second trigger element, for after the air-conditioning system runs preset time, calling the pressure acquiring unit.
As shown from the above technical solution, the present invention passes through the absolute value of the difference in water inlet hydraulic pressure value and water outlet hydraulic pressure value
When less than preset pressure threshold value, alarm is carried out, monoblock is avoided to be run and freezing water side under severe working condition
Heat exchanger is prevented in the case of not adding unit unit great amount of cost, easily realize the anti-frost protection to monoblock
Only entire monoblock is damaged and can not be run.
Description of the drawings
Fig. 1 be one embodiment of the present invention air-conditioning system in the antifreeze method of monoblock flow chart；
Fig. 2 is that the hydraulic pressure value of the monoblock of one embodiment of the present invention obtains schematic diagram；
Fig. 3 is that the water temperature value of the monoblock of one embodiment of the present invention obtains schematic diagram；
Fig. 4 be one embodiment of the present invention air-conditioning system in monoblock defroster structure diagram.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
Fig. 1 be one embodiment of the present invention air-conditioning system in the antifreeze method of monoblock flow chart；Referring to Fig.1,
The method includes：
S101：The water inlet hydraulic pressure value and water outlet hydraulic pressure value of acquiring unit unit；
It should be noted that the water inlet hydraulic pressure value can be passed by being set to the hydraulic pressure of the water inlet of the monoblock
Sensor acquires, and correspondingly, the water outlet hydraulic pressure value can be sensed by being set to the hydraulic pressure of the water outlet of the monoblock
Device acquires.
It will be appreciated that monoblock generally includes a water-side heat, and or it is arranged in parallel (i.e. water-side heat
Water inlet be connected with the water inlet of monoblock, the water outlet of water-side heat is connected with the water outlet of monoblock)
Multiple water-side heats.
In the concrete realization, case tube heat exchanger, double-tube heat exchanger or plate heat exchanger etc. can be used in the water-side heat
Water and the heat exchanger that refrigerant is media for heat exchange form, present embodiment do not limit this.
S102：Judge whether the absolute value of the difference of the water inlet hydraulic pressure value and water outlet hydraulic pressure value is less than preset pressure threshold
Value；
In the concrete realization, with reference to Fig. 2, usually before step S102, it can first calculate the water inlet hydraulic pressure value and go out
The absolute value of the difference of mouth of a river hydraulic pressure value, that is, be calculate by the following formula：
PDifference=| PInto-PGo out|,
Wherein, PIntoFor water inlet hydraulic pressure value, PGo outFor water outlet hydraulic pressure value, PDifferenceFor the water inlet hydraulic pressure value and water outlet saliva
The absolute value of the difference of pressure value.
S103：(the P when the absolute value is less than the preset pressure threshold valueDifference＜ Δs P, the Δ P are preset pressure threshold
Value), carry out alarm.
In the concrete realization, the executive agent of the method for present embodiment can be the control program main core in air-conditioning system
Piece, present embodiment do not limit this.
In the concrete realization, when the absolute value be more than or equal to the preset pressure threshold value, then meet the operation of air-conditioning system
Condition allows air-conditioning system normal operation.
It should be noted that the alarm can realize alarm by devices such as indicator light, buzzers, when
So, it can realize that alarm, present embodiment do not limit this with other forms.
Present embodiment in the absolute value of the difference of water inlet hydraulic pressure value and water outlet hydraulic pressure value by being less than preset pressure threshold
When value, alarm is carried out, in the case of not adding unit unit great amount of cost, easily realize to monoblock
Anti-frost protection.
On the basis of the above embodiment, the method further includes：
S104：The water inlet water temperature value and water outlet water temperature value of acquiring unit unit；
It should be noted that the water inlet hydraulic pressure value can be passed by being set to the temperature of the water inlet of the monoblock
Sensor acquires, and correspondingly, the water outlet hydraulic pressure value can be by being set to the temperature sensing of the water outlet of the monoblock
Device acquires.
S105：Judge whether the absolute value of the difference of the water inlet water temperature value and water outlet water temperature value is more than preset temperature threshold
Value；
In the concrete realization, with reference to Fig. 3, usually before step S105, it can first calculate the water inlet water temperature value and go out
The absolute value of the difference of outlet water temperature value, that is, be calculate by the following formula：
TDifference=| TInto-TGo out|,
Wherein, TIntoFor water inlet water temperature value, TGo outFor water outlet water temperature value, TDifferenceFor the water inlet water temperature value and water outlet saliva
The absolute value of the difference of temperature value.
S106：(the T when the absolute value is more than the preset temperature thresholdDifference＞ Δs T, the Δ T are preset temperature threshold
Value), carry out alarm.
In the concrete realization, when the absolute value be less than or equal to the preset pressure threshold value, then meet the operation of air-conditioning system
Condition allows air-conditioning system normal operation.
It should be noted that step S104~S106 is successively closed with step S101~S103 without specific in time
System, can be carried out at the same time, can also successively carry out, present embodiment does not limit this.
It will be appreciated that in PDifference＜ Δs P or TDifferenceWhen ＞ Δ T, alarm is only carried out, but generally requiring a period of time could
Artificial malfunction elimination is carried out, is easy within this time, the frozen ice of coolant media heat exchanger tube is pressurized and swarms in, to lead
Cause equipment damage directly can be shut down the air-conditioning system while carrying out alarm to avoid the occurrence of the problem
Therefore processing in step S103 or step S106, carries out alarm, further comprises：
The air-conditioning system is subjected to shutdown processing, and carries out alarm.
What is no matter executed when air-conditioning system is switched on and runs is heating mode or refrigeration mode, probably due to PDifference＜ Δs
P and lead to equipment damage, so, when air-conditioning system is switched on, triggering is needed to execute step S101, optionally, acquisitions is singly
Before the water inlet hydraulic pressure value and water outlet hydraulic pressure value of first unit, the method further includes：
When the air-conditioning system is switched on, the water inlet hydraulic pressure value and water outlet hydraulic pressure value of the acquiring unit unit are executed
The step of.
After air-conditioning system runs preset time, at this time it is believed that it is in the state of stable operation, but air-conditioning system is long
After time is in the state of stable operation, it is also possible to because of PDifference＜ Δs P and lead to equipment damage, so pre- in air-conditioning system operation
If after the time, triggering is needed to execute step S101, optionally, the water inlet hydraulic pressure value and water outlet saliva of the acquiring unit unit
Before pressure value, the method further includes：
After the air-conditioning system runs preset time, water inlet hydraulic pressure value and the water outlet of the acquiring unit unit are executed
The step of mouth hydraulic pressure value.
It will be appreciated that since air-conditioning system is in the overlong time of stable operation, in order to ensure air-conditioning system in stabilization
It will not lead to equipment damage during operation, after air-conditioning system runs preset time, step S101 can be triggered in real time, when
It so, also can clocked flip step S101.
Certainly, in order to ensure because of TDifference＞ Δs T and lead to equipment damage, while triggering step S101, also triggering step
Rapid S104.
After alarm, failure cause can be searched according to following logic：
First, the pump selection design for calculating water system, from the aspect of flow and lift two, according to interior machine and outer machine
Water resistance and flow, the factors such as design of same journey or off course of entire water system finally calculate the lift of water system, final to determine
Flow and lift that entire water system needs and remove design selection water pump, if pumps design model is less than normal, water flow can be caused
Less than normal, water-side heat is easy to freeze；
Again, whether investigation water system configures water flow switch, and water flow switch is played because water flow is less than normal or water system occurs
Dirty stifled phenomenon and stoppage protection of alarming, it is also noted that the correct installation and debugging of water flow switch ensure water system flow in minimum
It can play a protective role in time when limitation, if not configuring water flow switch or without correct installation and debugging, unit can be made to exist
Refrigeration is run in the case of having no water or little water flow, can freeze water-side heat quickly and damage entire air-conditioner set；
Secondly, the temperature value of detection inflow and outflow temperature sensor whether there is temperature drift, and temperature sensor is inserted into
The correct mounting means of sensing rod for temperature, it is also noted that the waterproof of the silica gel and temperature sensor that fill good heat conduction effect in temperature-sensitive is arranged
It applies, the no alarm and protection it will cause Inlet and outlet water excessive temperature differentials；
The proportioning of interior machine and outer machine will can cause to freeze and make according to the specification of Design cooling load, if interior machine load is excessive
Thermal effect is bad, also in machine intake-outlet valve it is few as possible with two-port valve and do not exceed the 50% of interior machine sum, it is above
Two factors can all cause system water flow can be less than normal and be possible to water-side heat freezeout occur；
The dirty stifled reason in water route causes water-side heat to freeze factor, because stable operation of unit will clean in time afterwards for a period of time
The pipeline and water-side heat of water system, and the water in more water-exchanging system, if replacing water and cleaning water system, president not in time
Phase forms the heat exchange copper tube in water trowel used for plastering and dirty miscellaneous and corrosion water-side heat, and heat exchange copper tube can be worn by depositing internal water impurity,
It will cause the bursting by freezing of water-side heat；
Whether the dirty stifled, air outlet of the interior for example interior machine heat exchanger of machine failure factor has blocking, the event of interior electromechanical machine and interior machine pcb board
Hinder and lead to that refrigeration effect is bad and water system in water internal circulating load it is few, and lead to PDifference＜ Δs P or TDifference＞ Δ T, alarm and protection avoid
Freezing water-side heat；
Other factors have outer machine PCB control panel failures, water system piping and valve member type selecting, and the factors such as emptying of water system are all
It can lead to PDifference＜ Δs P or TDifference＞ Δs T and stoppage protection of alarming, and then the damage of water-side heat is reduced, it is the peace of air-conditioner set
Full reliability service provides guarantee.
For method embodiment, for simple description, therefore it is all expressed as a series of combination of actions, but ability
Field technique personnel should know that embodiment of the present invention is not limited by the described action sequence, because according to the present invention
Embodiment, certain steps can be performed in other orders or simultaneously.Next, those skilled in the art should also know that,
Embodiment described in this description belongs to preferred embodiment, involved action embodiment party not necessarily of the present invention
Necessary to formula.
Fig. 4 be one embodiment of the present invention air-conditioning system in monoblock defroster structure diagram；With reference to figure
4, described device includes：
Pressure acquiring unit 401 is used for the water inlet hydraulic pressure value and water outlet hydraulic pressure value of acquiring unit unit；
Pressure judging unit 402, for judging that the absolute value of the difference of the water inlet hydraulic pressure value and water outlet hydraulic pressure value is
It is no to be less than preset pressure threshold value；
Pressure alarm unit 403, for when the absolute value is less than the preset pressure threshold value, carrying out alarm.
In the concrete realization, described device further includes：
Temperature acquiring unit is used for the water inlet water temperature value and water outlet water temperature value of acquiring unit unit；
Whether temperature judging unit, the absolute value of the difference for judging the water inlet water temperature value and water outlet water temperature value are big
In preset temperature threshold；
Temperature alarming unit, for when the absolute value is more than the preset temperature threshold, carrying out alarm.
In the concrete realization, the temperature alarming unit is further used for the air-conditioning system carrying out shutdown processing, and
Carry out alarm.
In the concrete realization, described device further includes：
First trigger element, for when the air-conditioning system is switched on, calling the pressure acquiring unit.
In the concrete realization, described device further includes：
Second trigger element, for after the air-conditioning system runs preset time, calling the pressure acquiring unit.
For system embodiments, since it is basically similar to the method embodiment, so fairly simple, the correlation of description
Place illustrates referring to the part of embodiment of the method.
It should be noted that in all parts of the system of the present invention, according to the function that it to be realized to therein
Component has carried out logical partitioning, and still, the present invention is not only restricted to this, all parts can be repartitioned as needed or
Person combines, for example, can be single component by some component combinations, or can be further broken into some components more
Subassembly.
The all parts embodiment of the present invention can be with hardware realization, or to transport on one or more processors
Capable software module is realized, or is realized with combination thereof.It will be understood by those of skill in the art that can make in practice
With microprocessor either digital signal processor (DSP) come realize in the system according to embodiment of the present invention some or it is complete
The some or all functions of portion's component.The present invention be also implemented as a part for executing method as described herein or
The equipment or program of device (for example, computer program and computer program product) of person's whole.It is such to realize the present invention's
Program can may be stored on the computer-readable medium, or can be with the form of one or more signal.Such signal
It can download and obtain from internet website, either provide on carrier signal or provide in any other forms.
It should be noted that the present invention will be described rather than limits the invention for the above embodiment, and this
Field technology personnel can design replacement embodiment without departing from the scope of the appended claims.In claim
In, any reference mark between bracket should not be configured to limitations on claims.Word "comprising" is not excluded for depositing
In element or step not listed in the claims.Word "a" or "an" before element do not exclude the presence of it is multiple this
The element of sample.The present invention can by means of include several different elements hardware and by means of properly programmed computer come
It realizes.In the unit claims listing several devices, several in these devices can be by the same hardware
It embodies.The use of word first, second, and third does not indicate that any sequence.These words can be construed to
Title.
Embodiment of above is only suitable for illustrating the present invention, and not limitation of the present invention, in relation to the common of technical field
Technical staff can also make a variety of changes and modification without departing from the spirit and scope of the present invention, therefore all
Equivalent technical solution also belongs to scope of the invention, and scope of patent protection of the invention should be defined by the claims.
Claims (8)
1. a kind of antifreeze method of monoblock in air-conditioning system, which is characterized in that the method includes：
The water inlet hydraulic pressure value and water outlet hydraulic pressure value of acquiring unit unit；
Judge whether the absolute value of the difference of the water inlet hydraulic pressure value and water outlet hydraulic pressure value is less than preset pressure threshold value；
When the absolute value is less than the preset pressure threshold value, alarm is carried out；
Before the water inlet hydraulic pressure value and water outlet hydraulic pressure value of the acquiring unit unit, the method further includes：
When the air-conditioning system is switched on, the step of the water inlet hydraulic pressure value and water outlet hydraulic pressure value of the acquiring unit unit is executed
Suddenly.
2. the method as described in claim 1, which is characterized in that the method further includes：
The water inlet water temperature value and water outlet water temperature value of acquiring unit unit；
Judge whether the absolute value of the difference of the water inlet water temperature value and water outlet water temperature value is more than preset temperature threshold；
When the absolute value is more than the preset temperature threshold, alarm is carried out.
3. method as claimed in claim 1 or 2, which is characterized in that the carry out alarm further comprises：
The air-conditioning system is subjected to shutdown processing, and carries out alarm.
4. method as claimed in claim 1 or 2, which is characterized in that the water inlet hydraulic pressure value of the acquiring unit unit and go out
Before the hydraulic pressure value of the mouth of a river, the method further includes：
After the air-conditioning system runs preset time, the water inlet hydraulic pressure value and water outlet saliva of the acquiring unit unit are executed
The step of pressure value.
5. monoblock defroster in a kind of air-conditioning system, which is characterized in that described device includes：
Pressure acquiring unit is used for the water inlet hydraulic pressure value and water outlet hydraulic pressure value of acquiring unit unit；
Pressure judging unit, for judging it is pre- whether the absolute value of the difference of the water inlet hydraulic pressure value and water outlet hydraulic pressure value is less than
If pressure threshold；
Pressure alarm unit, for when the absolute value is less than the preset pressure threshold value, carrying out alarm；
Described device further includes：
First trigger element, for when the air-conditioning system is switched on, calling the pressure acquiring unit.
6. device as claimed in claim 5, which is characterized in that described device further includes：
Temperature acquiring unit is used for the water inlet water temperature value and water outlet water temperature value of acquiring unit unit；
Temperature judging unit, for judging it is pre- whether the absolute value of the difference of the water inlet water temperature value and water outlet water temperature value is more than
If temperature threshold；
Temperature alarming unit, for when the absolute value is more than the preset temperature threshold, carrying out alarm.
7. device as claimed in claim 6, which is characterized in that the temperature alarming unit is further used for the air-conditioning
System carries out shutdown processing, and carries out alarm.
8. such as device described in claim 5 or 6, which is characterized in that described device further includes：
Second trigger element, for after the air-conditioning system runs preset time, calling the pressure acquiring unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510130967.6A CN104748306B (en) | 2015-03-24 | 2015-03-24 | The antifreeze method and device of monoblock in air-conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510130967.6A CN104748306B (en) | 2015-03-24 | 2015-03-24 | The antifreeze method and device of monoblock in air-conditioning system |
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| CN104748306B true CN104748306B (en) | 2018-10-16 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109990519B (en) * | 2019-04-17 | 2020-12-22 | 南京天加环境科技有限公司 | Air source heat pump anti-freezing control method |
| CN110260467B (en) * | 2019-05-28 | 2021-09-21 | 青岛海尔空调电子有限公司 | Air conditioner and anti-freezing protection control method and control device thereof |
| CN110440409A (en) * | 2019-08-08 | 2019-11-12 | 珠海格力电器股份有限公司 | The control method and water cooler of water cooler |
| CN113654184B (en) * | 2021-08-23 | 2022-10-25 | 珠海格力电器股份有限公司 | Control method for preventing water side of plate type heat exchanger of air conditioner from being blocked and air conditioner |
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| EP1329676A1 (en) * | 2002-01-22 | 2003-07-23 | GENCOLD S.r.l. | Water refrigeration unit |
| CN2896150Y (en) * | 2006-03-22 | 2007-05-02 | 四川长虹电器股份有限公司 | Anti-freezing device of cold-water machine group |
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| JP3234938B2 (en) * | 1995-04-04 | 2001-12-04 | 矢崎総業株式会社 | Absorption chiller / heater and control method |
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|---|---|---|---|---|
| EP1329676A1 (en) * | 2002-01-22 | 2003-07-23 | GENCOLD S.r.l. | Water refrigeration unit |
| CN1979063A (en) * | 2005-12-02 | 2007-06-13 | 深圳麦克维尔空调有限公司 | Anti-freezing method of air conditioner |
| CN2896150Y (en) * | 2006-03-22 | 2007-05-02 | 四川长虹电器股份有限公司 | Anti-freezing device of cold-water machine group |
| CN201463416U (en) * | 2009-07-08 | 2010-05-12 | 郑州中南科莱空调设备有限公司 | Anti-freezing sleeve-type evaporator |
| CN202813656U (en) * | 2012-07-13 | 2013-03-20 | 秦皇岛长丰太和新能源有限公司 | Improved freeze protection central air-conditioning water chiller |
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