CN112902400A - Air conditioner water system anti-freezing control method and device and air conditioner - Google Patents
Air conditioner water system anti-freezing control method and device and air conditioner Download PDFInfo
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- CN112902400A CN112902400A CN202011618545.0A CN202011618545A CN112902400A CN 112902400 A CN112902400 A CN 112902400A CN 202011618545 A CN202011618545 A CN 202011618545A CN 112902400 A CN112902400 A CN 112902400A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 602
- 238000007710 freezing Methods 0.000 title claims abstract description 194
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004378 air conditioning Methods 0.000 claims abstract description 327
- 230000008014 freezing Effects 0.000 claims abstract description 75
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000004590 computer program Methods 0.000 claims description 10
- 230000002528 anti-freeze Effects 0.000 claims 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 29
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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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- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner water system anti-freezing control method, an air conditioner water system anti-freezing control device and an air conditioner, wherein the air conditioner water system anti-freezing control method comprises the following steps: monitoring the temperature of a water inlet side and the temperature of a water outlet side of an air-conditioning water system; judging whether the air-conditioning water system meets a preset freezing protection condition or not based on the temperature of the water inlet side and the temperature of the water outlet side; and when the air conditioning water system meets the preset freezing protection condition, determining that the air conditioning water system is frozen, and performing freezing protection control on the air conditioning water system. The invention can carry out freezing protection control on the air conditioning water system when the air conditioning water system is frozen, thereby avoiding the damage of the air conditioner caused by the freezing of the water system and improving the reliability of the air conditioning unit.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner water system anti-freezing control method and device and an air conditioner.
Background
The water system of the air conditioner is flexible to arrange and good in independent adjustability, can meet the requirements of dispersed use of complex house types and independent operation of each room, and the application of the air conditioner with the water system (such as a module machine, a two-way water supply machine, a water unit and the like) is more and more extensive at present. However, the air conditioner with a water system mainly supplies cold and heat depending on the supplied cold and hot water, and a water pump of the water system is easily frozen in a low temperature state, thereby causing damage to the air conditioner. Therefore, the existing air conditioner with a water system has the problem that the reliability of an air conditioning unit is poor due to the fact that the water system is easy to freeze in a low-temperature state.
Disclosure of Invention
In order to solve the problems, the invention provides an air conditioner water system anti-freezing control method, an air conditioner water system anti-freezing control device and an air conditioner.
According to an embodiment of the invention, in one aspect, an anti-freezing control method for an air conditioner water system is provided, which includes: monitoring the temperature of a water inlet side and the temperature of a water outlet side of an air-conditioning water system; judging whether the air-conditioning water system meets a preset freezing protection condition or not based on the temperature of the water inlet side and the temperature of the water outlet side; and when the air-conditioning water system meets the preset freezing protection condition, determining that the air-conditioning water system is frozen, and performing freezing protection control on the air-conditioning water system.
By adopting the technical scheme, whether the air conditioning water system is frozen or not can be accurately judged, when the air conditioning water system meets the preset freezing protection condition, namely when the air conditioning water system is frozen, the freezing protection control is carried out on the air conditioning water system, the air conditioner is prevented from being damaged due to freezing of the water system, and the reliability of the air conditioning unit is improved.
Preferably, the step of determining whether the air-conditioning water system meets a preset freezing protection condition based on the temperature of the water inlet side and the temperature of the water outlet side includes: acquiring the temperature of a water inlet side and the temperature of a water outlet side of the air-conditioning water system in a first time period; timing the duration time that the temperature of the water inlet side or the temperature of the water outlet side of the first time interval is smaller than a first temperature limit value based on a first timer until the first time interval is ended to obtain first timing time; and when the first timing time is less than a first time limit value, determining that the air-conditioning water system meets a preset freezing protection condition, and when the first timing time is more than or equal to the first time limit value, determining that the air-conditioning water system does not meet the preset freezing protection condition.
By adopting the technical scheme, the duration that the temperature of the water inlet side or the temperature of the water outlet side is smaller than the first temperature limit value is timed, whether the air-conditioning water system meets the preset freezing protection condition or not is judged according to the timed first timing time, errors caused by single temperature detection can be avoided, and the accuracy of judging whether the air-conditioning water system is frozen or not is improved.
Preferably, the step of timing the duration that the temperature of the water inlet side or the temperature of the water outlet side of the first time interval is less than the first temperature limit value based on the first timer includes: when the temperature of the water inlet side and the temperature of the water outlet side in the first time period are both greater than a first temperature limit value, controlling a first timer to time; and when the temperature of the water inlet side or the temperature of the water outlet side in the first time period is less than or equal to the first temperature limit value, controlling the first timer to be cleared.
By adopting the technical scheme, the timer is used for detecting the duration that the temperature of the water inlet side and the temperature of the water outlet side are both greater than the first temperature limit value, and the first timer is reset when the temperature of the water inlet side or the temperature of the water outlet side in the first time period is less than or equal to the first temperature limit value, so that the freezing judgment error caused by sudden temperature drop of the air-conditioning water system in the first time period can be avoided, and an important basis is provided for judging whether the air-conditioning water system is frozen.
Preferably, the step of performing freeze protection control on the air conditioning water system includes: and performing state locking control on the air conditioning unit where the air conditioning water system is located, and sending an air conditioning locking prompt to a user.
By adopting the technical scheme, when the air conditioning water system is determined to be frozen, the air conditioning unit is controlled to be locked, an air conditioning locking prompt is sent to a user, the user can be prompted that the air conditioning water system is frozen, so that the user is prompted to take a defrosting measure for the air conditioning water system, damage to the air conditioning unit is reduced, and the safety and reliability of the air conditioning unit are improved.
Preferably, the anti-freezing control method for the air-conditioning water system further comprises the following steps: and when the air-conditioning water system does not meet the preset freezing protection condition and a water pump in the air-conditioning water system is in a closed state, performing anti-freezing control on the air-conditioning water system.
By adopting the technical scheme, when the air conditioning water system is not frozen and the water pump of the air conditioning water system is currently in a closed state, the air conditioning water system is subjected to anti-freezing control, so that the freezing of the air conditioning water system is avoided, and the reliability of the operation of the air conditioning unit is improved.
Preferably, the step of performing anti-freezing control on the air-conditioning water system includes: acquiring the temperature of a water inlet side and the temperature of a water outlet side of the air-conditioning water system in a second time period; judging whether the air-conditioning water system meets a preset anti-freezing action condition or not based on the water inlet side temperature and the water outlet side temperature of the second time period; and when the air-conditioning water system meets the preset anti-freezing action condition, controlling a water pump in the air-conditioning water system to be started.
By adopting the technical scheme, the water pump in the air-conditioning water system is controlled to be started, so that the water pump is in a running state, and the water pump can be prevented from being frozen; the temperature sensors on the water inlet side and the water outlet side of the air conditioner water system realize automatic anti-freezing of the air conditioner water system, other devices do not need to be additionally arranged, and anti-freezing control cost is saved.
Preferably, the step of judging whether the air-conditioning water system meets the preset anti-freezing action condition based on the temperature of the water inlet side and the temperature of the water outlet side in the second time period includes: timing the duration time that the temperature of the water inlet side or the temperature of the water outlet side in the second time interval is less than or equal to a second temperature limit value based on a second timer, and controlling the second timer to be reset when the temperature of the water inlet side and the temperature of the water outlet side in the second time interval are both greater than the second temperature limit value; and acquiring the current timing time of the second timer, determining that the air-conditioning water system meets a preset anti-freezing action condition when the current timing time of the second timer is greater than or equal to a second time limit value, and determining that the air-conditioning water system does not meet the preset anti-freezing action condition when the current timing time of the second timer is smaller than the second time limit value.
By adopting the technical scheme, whether the air-conditioning water system meets the preset anti-freezing action condition or not is judged according to the duration length of the water inlet side temperature or the water outlet side temperature which is less than or equal to the second temperature limit value, whether the air-conditioning water system has the risk of being frozen or not can be accurately judged, and the reliability of anti-freezing control of the air-conditioning water system is improved.
Preferably, the anti-freezing control method for the air-conditioning water system further comprises the following steps: when a water pump in the air-conditioning water system is started, acquiring the current water inlet side temperature and the current water outlet side temperature of the air-conditioning water system; judging whether the air-conditioning water system meets a preset anti-freezing exit condition or not based on the current water inlet side temperature and the current water outlet side temperature; and when the air-conditioning water system meets the preset anti-freezing exit condition, controlling a water pump in the air-conditioning water system to be closed.
By adopting the technical scheme, when the air-conditioning water system meets the preset anti-freezing exit condition, the water pump in the air-conditioning water system is controlled to be closed, so that the anti-freezing control of the air-conditioning water system is realized, the problem that the power consumption is higher due to the long-time operation of the water pump is avoided, and the stability of the anti-freezing control is improved.
Preferably, the step of judging whether the air-conditioning water system meets a preset anti-freezing exit condition based on the current water inlet side temperature and the current water outlet side temperature includes: timing the duration that the current water inlet side temperature and the current water outlet side temperature are both greater than the third temperature limit value based on a third timer, and controlling the third timer to be reset when the current water inlet side temperature or the current water outlet side temperature is less than or equal to the third temperature limit value; wherein the third temperature limit is greater than the second temperature limit; and acquiring the current timing time of the third timer, and determining that the air-conditioning water system meets a preset anti-freezing exit condition when the current timing time of the third timer is greater than or equal to a third time limit value.
By adopting the technical scheme, the third temperature limit value is set to be larger than the second temperature limit value, so that frequent switching-in or quitting of anti-freezing control can be avoided, frequent switching of a water pump is prevented from being controlled, and the stability of the air conditioning unit is improved.
According to an embodiment of the present invention, in another aspect, there is provided an anti-freezing control device for an air conditioning water system, including: the monitoring module is used for monitoring the temperature of a water inlet side and the temperature of a water outlet side of the air-conditioning water system; the judging module is used for judging whether the air-conditioning water system meets a preset freezing protection condition or not based on the temperature of the water inlet side and the temperature of the water outlet side; and the control module is used for determining that the air conditioning water system is frozen when the air conditioning water system meets the preset freezing protection condition, and performing freezing protection control on the air conditioning water system.
According to an embodiment of the present invention, in another aspect, there is provided an air conditioner including a water system, and a computer readable storage medium and a processor storing a computer program, which when read and executed by the processor, implements the method according to any one of the first aspect.
According to an embodiment of the present invention, in another aspect, a computer-readable storage medium is provided, which stores a computer program, which when read and executed by a processor, implements the method according to any one of the first aspect.
The invention has the following beneficial effects: the temperature of the water inlet side and the temperature of the water outlet side of the air conditioning water system are monitored, whether the air conditioning water system meets the preset freezing protection condition or not is judged according to the monitored temperature of the water inlet side and the monitored temperature of the water outlet side, whether the air conditioning water system is frozen or not can be accurately judged, when the air conditioning water system meets the preset freezing protection condition, namely when the air conditioning water system is frozen, the freezing protection control is carried out on the air conditioning water system, the air conditioner is prevented from being damaged due to freezing of the water system, and the reliability of an air conditioning unit is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a flow chart of an anti-freezing control method for an air conditioning water system according to the present invention;
fig. 2 is a schematic structural diagram of an anti-freezing control device of an air conditioning water system provided by the invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The first embodiment is as follows:
the embodiment provides an anti-freezing control method for an air conditioning water system, which can be applied to an air conditioner with a water system, and referring to a flow chart of the anti-freezing control method for the air conditioning water system shown in fig. 1, the method mainly comprises the following steps S102 to S106:
and S102, monitoring the temperature of the water inlet side and the temperature of the water outlet side of the air-conditioning water system.
The temperature sensors are respectively arranged on the water inlet side and the water outlet side of the air-conditioning water system, and the temperature of the water inlet side and the temperature of the water outlet side of the air-conditioning water system are detected in real time or at preset time intervals based on the temperature sensors to obtain temperature values of the water inlet side and the water outlet side of the air-conditioning water system at a plurality of moments.
And step S104, judging whether the air-conditioning water system meets a preset freezing protection condition or not based on the temperature of the water inlet side and the temperature of the water outlet side.
In order to accurately judge whether the air-conditioning water system is frozen, a preset freezing protection condition can be set according to the temperature of the air-conditioning water system when freezing occurs under the normal condition, such as judging whether the temperature of the water inlet side and/or the temperature of the water outlet side is lower than the preset freezing temperature, and when the temperature of the water inlet side and/or the temperature of the water outlet side is higher than the preset freezing temperature, determining that the air-conditioning water system meets the preset freezing protection condition.
And S106, when the air conditioning water system meets the preset freezing protection condition, determining that the air conditioning water system is frozen, and performing freezing protection control on the air conditioning water system.
When the air conditioning water system is judged to be frozen, in order to avoid damage to the air conditioning unit when the air conditioning water system is frozen, freezing protection control is carried out on the air conditioning water system, such as controlling the air conditioning water system to be in a closed state until the air conditioning water system is unfrozen.
According to the anti-freezing control method for the air conditioning water system, the water inlet side temperature and the water outlet side temperature of the air conditioning water system are monitored, whether the air conditioning water system meets the preset freezing protection condition or not is judged according to the monitored water inlet side temperature and water outlet side temperature, whether the air conditioning water system is frozen or not can be accurately judged, when the air conditioning water system meets the preset freezing protection condition, namely when the air conditioning water system is frozen, the freezing protection control is carried out on the air conditioning water system, the air conditioner is prevented from being damaged due to freezing of the water system, and the reliability of the air conditioning unit is improved.
In order to accurately determine whether the air-conditioning water system meets the preset freezing protection condition, the embodiment provides an implementation manner for determining whether the air-conditioning water system meets the preset freezing protection condition based on the temperature of the water inlet side and the temperature of the water outlet side, and the implementation manner can be specifically executed by referring to the following steps (1) to (3):
step (1): and acquiring the temperature of the water inlet side and the temperature of the water outlet side of the air-conditioning water system in a first time period.
The first time period can be a time period of 0-t1 after the air conditioning unit is powered on (the value range of t1 can be any value within 5 s-20 s), and after the air conditioning unit is powered on, temperature detection is respectively carried out on the water inlet side and the water outlet side of the air conditioning water system within t1 time to obtain the temperature of the water inlet side and the temperature of the water outlet side of the first time period.
Step (2): and timing the duration that the temperature of the water inlet side or the temperature of the water outlet side of the first time interval is smaller than the first temperature limit value based on the first timer.
The temperature of the water inlet side and the temperature of the water outlet side are detected while the temperature of the water inlet side and the temperature of the water outlet side of the air-conditioning water system are detected, and the temperature is judged according to the temperature judgment result. And when the temperature of the water inlet side or the temperature of the water outlet side is smaller than the first temperature limit value, timing based on the first timer.
Timing based on a first timer when the temperature of the water inlet side and the temperature of the water outlet side in the first time period are both greater than a first temperature limit value; and when the temperature of the water inlet side or the temperature of the water outlet side in the first time period is less than or equal to the first temperature limit value, controlling the first timer to be reset. And timing by using the first timer based on the conditions, and obtaining the final timing time of the first timer when the first period is finished, and recording the final timing time as the first timing time.
In the first period, when the water inlet side temperature Tin and the water outlet side temperature Tout are detected to be both greater than the first temperature limit value T1_ limt, namely when Tin is greater than T1_ limt and Tout is greater than T1_ limt, the temperature of the water inlet side and the water outlet side of the air-conditioning water system is high, the air-conditioning water system is not frozen, and the duration of time that the water inlet side temperature Tin and the water outlet side temperature Tout are both greater than the first temperature limit value is recorded based on the first timer. The first temperature limit T1_ limt may be determined by a critical temperature value when the air conditioning water system freezes (such as may be 0-1 ℃).
In the first time interval, when the water inlet side temperature Tin or the water outlet side temperature Tout is detected to be less than or equal to the first temperature limit value T1_ limt, namely when Tin is less than or equal to T1_ limt or Tout is less than or equal to T1_ limt, a position with lower temperature exists in the surface air-conditioning water system, the air-conditioning water system may be partially frozen or completely frozen, and the first timer is controlled to be cleared. The timer is used for detecting the duration that the temperature of the water inlet side and the temperature of the water outlet side are both greater than the first temperature limit value, and the first timer is reset when the temperature of the water inlet side or the temperature of the water outlet side in the first time period is less than or equal to the first temperature limit value, so that the freezing judgment error caused by sudden temperature drop of the air-conditioning water system in the first time period can be avoided, and an important basis is provided for judging whether the air-conditioning water system is frozen.
And (3): and when the first timing time is greater than or equal to the first time limit value, determining that the air-conditioning water system does not meet the preset freezing protection condition.
When the first timing Time Time _ Nomal obtained by the first timer at the end of the first Time period is less than the first Time limit Time1, namely when Time _ Nomal is less than Time1, the duration that the temperature Tin at the water inlet side and the temperature Tout at the water outlet side of the air-conditioning water system are both greater than the first temperature limit is short, the temperature Tin at the water inlet side and the temperature Tout at the water outlet side of the air-conditioning water system are in a state of being less than the first temperature limit for a long Time in the first Time period, and the fact that the air-conditioning water system is frozen is determined. The value of the first Time limit value Time1 may be determined according to the Time length t1 of the first Time interval, such as any value between 0.5 × t1 and 0.7 × t1 (e.g., Time1 may be 3s when t1 is 5 s; Time1 may be 5s when t1 is 10 s; and Time1 may be 10s when t1 is 20 s).
When the first timing Time Time _ Nomal obtained by the first timer at the end of the first period is greater than or equal to the first Time limit value, namely when Time _ Nomal is greater than or equal to Time1, the duration Time indicating that the temperature Tin at the water inlet side and the temperature Tout at the water outlet side of the air-conditioning water system are both greater than the first temperature limit value is longer, and the air-conditioning water system is not frozen. By timing the duration that the temperature of the water inlet side or the temperature of the water outlet side is smaller than the first temperature limit value and judging whether the air-conditioning water system meets the preset freezing protection condition or not according to the first timing time obtained by timing, errors caused by single temperature detection can be avoided, and the accuracy of judging whether the air-conditioning water system is frozen or not is improved.
In order to improve the safety of the air conditioning unit, the embodiment provides a specific implementation manner of performing freezing protection control on an air conditioning water system: and performing state locking control on the air conditioning unit where the air conditioning water system is positioned, and sending an air conditioning locking prompt to a user. When the water system of the air conditioning unit is frozen, if the air conditioning unit is continuously started to operate, irreversible damage can be caused to the air conditioning unit, in order to improve the safety and reliability of the air conditioning unit, when the air conditioning water system is determined to be frozen, the air conditioning unit is controlled to be locked, so that the air conditioning unit cannot be started to operate, an air conditioning locking prompt is sent to a user to prompt the user that the air conditioning water system is frozen, the air conditioning unit is in a locked state, so that the user is prompted to take unfreezing measures for the air conditioning water system, the damage to the air conditioning unit is reduced, and the safety and reliability of the air conditioning unit.
In a specific embodiment, the air conditioner locking prompt may include any one or more of a text display (displaying a freeze protection code, such as displaying a text prompt of "error" or "air conditioner locking"), an audio prompt, an indicator light prompt, and an alarm sound prompt. And when an exit protection instruction input by a user is received, controlling the air conditioning unit to unlock, wherein the exit protection instruction can be input through a line controller, a remote controller or a control panel.
When the air conditioning water system is not frozen, in order to avoid freezing of the air conditioning water system, the method provided by the embodiment further comprises the following steps: and when the air-conditioning water system does not meet the preset freezing protection condition and a water pump in the air-conditioning water system is in a closed state, performing anti-freezing control on the air-conditioning water system. When the air conditioning water system is not frozen and a water pump of the air conditioning water system is in a closed state currently, the air conditioning water system is subjected to anti-freezing control, so that the air conditioning water system is prevented from being frozen, and the running reliability of an air conditioning unit is improved.
In order to improve the reliability of the anti-freezing control of the air-conditioning water system, the embodiment provides an implementation manner of the anti-freezing control of the air-conditioning water system, and the following steps 1) to 4) may be specifically referred to:
step 1): and acquiring the temperature of the water inlet side and the temperature of the water outlet side of the air-conditioning water system in the second time period.
The second time period may be a time period after the time t1 elapses since the air conditioning unit is powered on, that is, when the current time ton > t1, where the current time ton is counted from the time when the air conditioning unit is powered on, the temperature of the water inlet side and the temperature of the water outlet side of the air conditioning water system are continuously detected, and the temperature of the water inlet side and the temperature of the water outlet side in the second time period are obtained.
Step 2): and judging whether the air-conditioning water system meets the preset anti-freezing action condition or not based on the temperature of the water inlet side and the temperature of the water outlet side in the second time period.
Because the air-conditioning water system still has the risk of being frozen in the second time interval, in order to prevent the air conditioning unit from being damaged when the anti-freezing action is executed, whether the air-conditioning water system meets the preset anti-freezing action condition in the second time interval can be further judged, namely whether the air-conditioning water system can execute the anti-freezing control action in the second time interval is judged.
In a specific embodiment, firstly, the duration that the water inlet side temperature or the water outlet side temperature of the second time interval is less than or equal to the second temperature limit value is counted based on the second timer, and when the water inlet side temperature and the water outlet side temperature of the second time interval are both greater than the second temperature limit value, the second timer is controlled to be cleared.
When the current time ton is more than T1, if the inlet side temperature Tin or the outlet side temperature Tout is less than or equal to the second temperature limit value T2_ limt, namely when Tin is less than or equal to T2_ limt or Tout is less than or equal to T2_ limt, the air-conditioned water system is indicated to be at risk of being frozen, and the duration of the inlet side temperature Tin or the outlet side temperature Tout being less than or equal to the second temperature limit value is recorded based on the second timer. The second temperature limit is greater than the first temperature limit and may be, for example, 1 deg.C to 2 deg.C.
When the current time ton is more than T1, if the water inlet side temperature Tin and the water outlet side temperature Tout are both greater than the second temperature limit value T2_ limt, namely when Tin is more than T2_ limt and Tout is more than T2_ limt, the temperatures of the water inlet side and the water outlet side of the air-conditioning water system are high, the air-conditioning water system does not have the risk of being frozen at the moment, and the second timer is controlled to be reset to zero.
And then, acquiring the current timing time of a second timer, determining that the air-conditioning water system meets the preset anti-freezing action condition when the current timing time of the second timer is greater than or equal to a second time limit value, and determining that the air-conditioning water system does not meet the preset anti-freezing action condition when the current timing time of the second timer is less than the second time limit value.
When the current timing Time Enter _ Time of the second timer is greater than or equal to the second Time limit T2_ limt, namely when the Enter _ Time is greater than or equal to Time2, the duration that the temperature Tin at the water inlet side or the temperature Tout at the water outlet side of the air-conditioning water system is less than or equal to the second temperature limit is longer, the risk of freezing of the air-conditioning water system is higher, the air-conditioning water system is determined to meet the preset anti-freezing action condition, the air-conditioning water system is controlled to Enter anti-freezing control, and the freezing of the air-conditioning water system is avoided. The second time limit T2_ limt may be any value between 0.5 × T1 and 0.7 × T1.
When the current timing Time Enter _ Time of the second timer is less than the second Time limit T2_ limt, namely when the Enter _ Time is less than Time2, the duration that the temperature Tin at the water inlet side and the temperature Tout at the water outlet side of the air-conditioning water system are both greater than the second temperature limit is longer, the air-conditioning water system does not have the risk of being frozen, the air-conditioning water system is determined not to meet the preset anti-freezing action condition, namely the air-conditioning water system does not need to be subjected to anti-freezing control, and the water pump of the air-conditioning water system is kept in the current closed state.
Whether the air-conditioning water system meets the preset anti-freezing action condition or not is judged according to the duration length of the water inlet side temperature or the water outlet side temperature which is less than or equal to the second temperature limit value, whether the air-conditioning water system has the risk of being frozen or not can be accurately judged, and the reliability of anti-freezing control of the air-conditioning water system is improved.
Step 3): and when the air conditioning water system meets the preset anti-freezing action condition, controlling a water pump in the air conditioning water system to be started.
When the air-conditioning water system meets the preset anti-freezing action condition, the fact that the air-conditioning water system has a large freezing risk is determined, anti-freezing control action is executed on the air-conditioning water system, a water pump in the air-conditioning water system is controlled to be started, the water pump is enabled to be in a running state, and the water pump is prevented from being frozen. The temperature sensors on the water inlet side and the water outlet side of the air conditioner water system realize automatic anti-freezing of the air conditioner water system, other devices do not need to be additionally arranged, and anti-freezing control cost is saved.
Step 4): when a water pump in the air-conditioning water system is started, acquiring the current water inlet side temperature and the current water outlet side temperature of the air-conditioning water system; judging whether the air-conditioning water system meets a preset anti-freezing exit condition or not based on the current water inlet side temperature and the current water outlet side temperature; and when the air-conditioning water system meets the preset anti-freezing exit condition, controlling a water pump in the air-conditioning water system to be closed.
In the process of performing anti-freezing control on the air-conditioning water system, the current water inlet side temperature and the current water outlet side temperature of the air-conditioning water system are acquired in real time or at preset time intervals, whether anti-freezing control needs to be quitted or not is judged based on the current water inlet side temperature and the current water outlet side temperature, and when the air-conditioning water system meets preset anti-freezing quitting conditions, a water pump in the air-conditioning water system is controlled to be turned off, so that the anti-freezing control on the air-conditioning water system is realized, the problem that the power consumption is high due to long-time operation of the water pump is avoided.
In order to improve the reliability of the anti-freezing control, the embodiment provides a specific implementation manner for judging whether the air-conditioning water system meets the preset anti-freezing exit condition based on the current water inlet side temperature and the current water outlet side temperature: timing the duration that the current water inlet side temperature and the current water outlet side temperature are both greater than a third temperature limit value based on a third timer, and controlling the third timer to be reset when the current water inlet side temperature or the current water outlet side temperature is less than or equal to the third temperature limit value; wherein the third temperature limit is greater than the second temperature limit.
When a water pump in the air-conditioning water system is started, detecting the current water inlet side temperature and the current water outlet side temperature of the air-conditioning water system, when detecting that the current water inlet side temperature Tin and the current water outlet side temperature Tout are both greater than a third temperature limit value T3_ limt, namely when Tin is greater than T3_ limt and Tout is greater than T3_ limt, indicating that the temperatures of the water inlet side and the water outlet side of the air-conditioning water system are higher, and recording the duration time that the current water inlet side temperature Tin and the current water outlet side temperature Tout are both greater than the third temperature limit value based on a third timer. The third temperature limit T3_ limt is T2_ limt + Texit, where Texit may take a value of 1 to 2 ℃. By setting the third temperature limit value to be larger than the second temperature limit value, frequent switching-in or quitting of anti-freezing control can be avoided, frequent switching of a water pump is avoided, and stability of the air conditioning unit is improved.
When the current water inlet side temperature Tin or the current water outlet side temperature Tout is detected to be less than or equal to the third temperature limit value T3_ limt, namely when Tin is less than or equal to T3_ limt or Tout is less than or equal to T3_ limt, the air-conditioning water system still has the risk of being frozen, and the third timer is controlled to be reset.
And acquiring the current timing time of the third timer, and determining that the air-conditioning water system meets the preset anti-freezing exit condition when the current timing time of the third timer is greater than or equal to a third time limit value.
When the current timing Time Exit _ Time of the third timer is greater than or equal to a third Time limit value Time3, namely when the Enter _ Time is greater than or equal to Time3, the duration that the current water inlet side temperature Tin and the current water outlet side temperature Tout are both greater than the third temperature limit value is longer, the air-conditioning water system is in a higher temperature state for a long Time, the risk of freezing of the air-conditioning water system does not exist, the air-conditioning water system is determined to meet a preset anti-freezing Exit condition, and a water pump in the air-conditioning water system is controlled to be turned off so as to automatically Exit the anti-freezing control. The third Time limit Time3 may be any value between 0.5 t1 and 0.7 t 1.
When the current timing Time Exit _ Time of the third timer is less than the third Time limit value Time3, namely when the Enter _ Time is less than the Time3, the duration that the current water inlet side temperature Tin and the current water outlet side temperature Tout are both greater than the third temperature limit value is short, the air-conditioning system still has the risk of being frozen, the air-conditioning water system is determined not to meet the preset anti-freezing Exit condition, the anti-freezing control is not exited, and the water pump in the air-conditioning water system is controlled to be in an open state.
According to the anti-freezing control method for the air-conditioning water system, whether the air-conditioning water system is frozen or not can be automatically judged based on the temperature sensor, the air-conditioning unit can be protected from being frozen when the air-conditioning water system is frozen, the air-conditioning unit is prevented from being damaged and breaking down, anti-freezing control can be automatically started or stopped when the air-conditioning water system is not frozen, artificial anti-freezing is not needed, and the use convenience of a user is improved.
Example two:
corresponding to the air conditioning water system anti-freezing control method provided by the first embodiment, the embodiment of the invention provides an example of performing anti-freezing control on an air conditioning unit by using the air conditioning water system anti-freezing control method, which can be specifically executed by referring to the following steps 1 to 3:
step 1: and judging whether a water pump of the air-conditioning water system is frozen or not, and if so, performing freezing protection on the air-conditioning water system.
After the air conditioner unit is powered on, the temperature of the water inlet side and the temperature of the water outlet side of the air-conditioning water system in t1 time are judged and timed based on the first timer.
If Tin is greater than T1_ limt and Tout is greater than T1_ limt, performing accumulated timing based on a first timer Time _ Nomal;
and if the Tin is less than or equal to T1_ limt or the Tout is less than or equal to T1_ limt, controlling the first timer Time _ Nomal clear 0.
When the time ton after power-on reaches the freeze protection determination time t1, it is determined whether or not freeze protection is entered:
if the Time _ Nomal is less than the Time, determining that a water pump of an air-conditioning water system is frozen, and entering freezing protection; and triggering the air conditioning unit to display the protection code and controlling the air conditioning unit to be locked so that the air conditioning unit cannot be started. The user can unlock manually (line controller or remote controller), i.e. manually set "exit guard".
And if the Time _ Nomal is larger than or equal to the Time and the water pump is closed, judging the anti-freezing control.
Step 2: and if not, performing anti-freezing control on the air conditioner unit.
When the time ton after power-on reaches the freezing protection judgment time t1, namely ton is greater than t1, the freezing protection is not started, and the water pump is not started at the time, the judgment of the anti-freezing protection is carried out:
if Tin is less than or equal to T2_ limt or Tout is less than or equal to T2_ limt, performing accumulated timing based on a second timer Enter _ Time;
if Tin > T2_ limt and Tout > T2_ limt, the second timer, Enter _ Time, is controlled to clear 0.
Judging whether to Enter the anti-freezing control according to a second timing value Enter _ Time of the anti-freezing control:
if the Enter _ Time is less than the Time, the anti-freezing control is not started; the water pump of the air-conditioning water system is kept in a current closed state.
And if the Enter _ Time is larger than or equal to the Time, entering anti-freezing control, and controlling a water pump of the air-conditioning water system to be started to prevent the water pump from being frozen.
And step 3: and judging whether to quit the anti-freezing control.
After a water pump of the air-conditioning water system is started, calculating a third timing value Exit _ Time according to Tin and Tout:
if Tin is less than or equal to T2_ limt + Texit or Tout is less than or equal to T2_ limt + Texit, controlling a third timing value Exit _ Time clear 0;
if Tin is greater than T2_ limt + Texit and Tout is greater than T2_ limt + Texit, the timer is accumulated based on the third timer value Exit _ Time.
Judging whether to quit the anti-freezing control according to a third timing value Exit _ Time:
if the Exit _ Time is less than the Time, the anti-freezing control is not exited;
and if the Enter _ Time is larger than or equal to the Time, exiting the anti-freezing control.
Example three:
corresponding to the air conditioning water system anti-freezing control method provided by the first embodiment, the embodiment of the invention provides an air conditioning water system anti-freezing control device, referring to the structural schematic diagram of the air conditioning water system anti-freezing control device shown in fig. 2, and the device comprises the following modules:
and the monitoring module 21 is used for monitoring the temperature of the water inlet side and the temperature of the water outlet side of the air-conditioning water system.
And the judging module 22 is used for judging whether the air-conditioning water system meets the preset freezing protection condition or not based on the temperature of the water inlet side and the temperature of the water outlet side.
And the control module 23 is configured to determine that the air conditioning water system is frozen when the air conditioning water system meets a preset freezing protection condition, and perform freezing protection control on the air conditioning water system.
According to the anti-freezing control device for the air conditioning water system, the temperature of the water inlet side and the temperature of the water outlet side of the air conditioning water system are monitored, whether the air conditioning water system meets the preset freezing protection condition or not is judged according to the monitored temperature of the water inlet side and the monitored temperature of the water outlet side, whether the air conditioning water system is frozen or not can be accurately judged, when the air conditioning water system meets the preset freezing protection condition, namely when the air conditioning water system is frozen, the freezing protection control is carried out on the air conditioning water system, the air conditioner is prevented from being damaged due to freezing of the water system, and the reliability of an air conditioning unit is improved.
In an embodiment, the determining module 22 is further configured to obtain a water inlet side temperature and a water outlet side temperature of the air-conditioning water system in a first time period; timing the duration time that the temperature of the water inlet side or the temperature of the water outlet side is smaller than the first temperature limit value in the first time period based on the first timer until the first time period is finished to obtain first timing time; and when the first timing time is greater than or equal to the first time limit value, determining that the air-conditioning water system does not meet the preset freezing protection condition.
In an embodiment, the determining module 22 is further configured to control a first timer to time when both the temperature of the water inlet side and the temperature of the water outlet side in the first period are greater than a first temperature limit value; and when the temperature of the water inlet side or the temperature of the water outlet side in the first time period is less than or equal to the first temperature limit value, controlling the first timer to be reset.
In an embodiment, the control module 23 is further configured to perform state locking control on the air conditioning unit where the air conditioning water system is located, and send an air conditioning locking prompt to a user.
In one embodiment, the above apparatus further comprises:
and the anti-freezing control module is used for performing anti-freezing control on the air-conditioning water system when the air-conditioning water system does not meet the preset freezing protection condition and a water pump in the air-conditioning water system is in a closed state.
In an embodiment, the anti-freezing control module is further configured to obtain a water inlet side temperature and a water outlet side temperature of the air-conditioning water system in the second time period; judging whether the air-conditioning water system meets the preset anti-freezing action condition or not based on the temperature of the water inlet side and the temperature of the water outlet side in the second time period; and when the air conditioning water system meets the preset anti-freezing action condition, controlling a water pump in the air conditioning water system to be started.
In an embodiment, the anti-freezing control module is further configured to time, based on a second timer, a duration that the temperature of the water inlet side or the temperature of the water outlet side in the second time period is less than or equal to a second temperature limit value, and when both the temperature of the water inlet side and the temperature of the water outlet side in the second time period are greater than the second temperature limit value, control the second timer to be cleared; and when the current timing time of the second timer is less than the second time limit value, the air-conditioning water system is determined not to meet the preset anti-freezing action condition.
In one embodiment, the above apparatus further comprises:
the exit judging module is used for acquiring the current water inlet side temperature and the current water outlet side temperature of the air-conditioning water system when a water pump in the air-conditioning water system is started; judging whether the air-conditioning water system meets a preset anti-freezing exit condition or not based on the current water inlet side temperature and the current water outlet side temperature; and when the air-conditioning water system meets the preset anti-freezing exit condition, controlling a water pump in the air-conditioning water system to be closed.
In an embodiment, the exit determining module is further configured to time a duration that both the current water inlet side temperature and the current water outlet side temperature are greater than a third temperature limit value based on a third timer, and control the third timer to reset when the current water inlet side temperature or the current water outlet side temperature is less than or equal to the third temperature limit value; wherein the third temperature limit is greater than the second temperature limit; and acquiring the current timing time of the third timer, and determining that the air-conditioning water system meets the preset anti-freezing exit condition when the current timing time of the third timer is greater than or equal to a third time limit value.
The anti-freezing control device for the air conditioning water system provided by the embodiment can automatically judge whether the air conditioning water system is frozen or not based on the temperature sensor, can freeze and protect the air conditioning unit when the air conditioning water system is frozen, avoids the air conditioning unit from being damaged and breaking down, can automatically enter or exit anti-freezing control when the air conditioning water system is not frozen, does not need artificial anti-freezing, and improves the convenience of use for users.
Example four:
corresponding to the method for controlling freezing prevention of the water system of the air conditioner, the embodiment provides an air conditioner, which comprises a water system, a computer readable storage medium storing a computer program and a processor, wherein when the computer program is read and executed by the processor, the method for controlling freezing prevention of the water system of the air conditioner is implemented.
Example five:
the embodiment further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned method for controlling freezing prevention of an air conditioning water system, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Of course, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments may be implemented by instructing the control device to perform operations through a computer, and the programs may be stored in a computer-readable storage medium, and when executed, the programs may include the processes of the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The anti-freezing control device of the air-conditioning water system and the air conditioner disclosed by the embodiment correspond to the anti-freezing control method of the air-conditioning water system disclosed by the embodiment, so that the description is relatively simple, and the relevant points can be referred to the description of the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. An anti-freezing control method for an air conditioning water system is characterized by comprising the following steps:
monitoring the temperature of a water inlet side and the temperature of a water outlet side of an air-conditioning water system;
judging whether the air-conditioning water system meets a preset freezing protection condition or not based on the temperature of the water inlet side and the temperature of the water outlet side;
and when the air-conditioning water system meets the preset freezing protection condition, determining that the air-conditioning water system is frozen, and performing freezing protection control on the air-conditioning water system.
2. The antifreeze control method for water system of air-conditioning according to claim 1, wherein said step of determining whether the water system of air-conditioning satisfies a preset freeze protection condition based on the temperature of the water inlet side and the temperature of the water outlet side comprises:
acquiring the temperature of a water inlet side and the temperature of a water outlet side of the air-conditioning water system in a first time period;
timing the duration time that the temperature of the water inlet side or the temperature of the water outlet side of the first time interval is smaller than a first temperature limit value based on a first timer until the first time interval is ended to obtain first timing time;
and when the first timing time is less than a first time limit value, determining that the air-conditioning water system meets a preset freezing protection condition, and when the first timing time is more than or equal to the first time limit value, determining that the air-conditioning water system does not meet the preset freezing protection condition.
3. The air conditioner water system anti-freezing control method as claimed in claim 2, wherein the step of timing the duration of the first period of time in which the temperature of the water inlet side or the temperature of the water outlet side is less than the first temperature limit value based on the first timer comprises:
when the temperature of the water inlet side and the temperature of the water outlet side in the first time period are both greater than a first temperature limit value, controlling a first timer to time;
and when the temperature of the water inlet side or the temperature of the water outlet side in the first time period is less than or equal to the first temperature limit value, controlling the first timer to be cleared.
4. The antifreeze control method for water system of air-conditioning system as set forth in claim 1, wherein said step of performing freeze protection control for said water system of air-conditioning comprises:
and performing state locking control on the air conditioning unit where the air conditioning water system is located, and sending an air conditioning locking prompt to a user.
5. The antifreeze control method for water system of air conditioner as set forth in claim 1, further comprising:
and when the air-conditioning water system does not meet the preset freezing protection condition and a water pump in the air-conditioning water system is in a closed state, performing anti-freezing control on the air-conditioning water system.
6. The antifreeze control method for an air conditioning water system as set forth in claim 5, wherein said step of performing antifreeze control on said air conditioning water system comprises:
acquiring the temperature of a water inlet side and the temperature of a water outlet side of the air-conditioning water system in a second time period;
judging whether the air-conditioning water system meets a preset anti-freezing action condition or not based on the water inlet side temperature and the water outlet side temperature of the second time period;
and when the air-conditioning water system meets the preset anti-freezing action condition, controlling a water pump in the air-conditioning water system to be started.
7. The antifreeze control method for water system of air-conditioning according to claim 6, wherein said step of determining whether the water system of air-conditioning satisfies the predetermined antifreeze action condition based on the temperature of the water inlet side and the temperature of the water outlet side of the second period of time comprises:
timing the duration time that the temperature of the water inlet side or the temperature of the water outlet side in the second time interval is less than or equal to a second temperature limit value based on a second timer, and controlling the second timer to be reset when the temperature of the water inlet side and the temperature of the water outlet side in the second time interval are both greater than the second temperature limit value;
and acquiring the current timing time of the second timer, determining that the air-conditioning water system meets a preset anti-freezing action condition when the current timing time of the second timer is greater than or equal to a second time limit value, and determining that the air-conditioning water system does not meet the preset anti-freezing action condition when the current timing time of the second timer is smaller than the second time limit value.
8. The antifreeze control method for water system of air conditioner as set forth in claim 7, further comprising:
when a water pump in the air-conditioning water system is started, acquiring the current water inlet side temperature and the current water outlet side temperature of the air-conditioning water system;
judging whether the air-conditioning water system meets a preset anti-freezing exit condition or not based on the current water inlet side temperature and the current water outlet side temperature;
and when the air-conditioning water system meets the preset anti-freezing exit condition, controlling a water pump in the air-conditioning water system to be closed.
9. The antifreeze control method for water system of air-conditioning system as claimed in claim 8, wherein said step of determining whether the water system of air-conditioning satisfies a preset antifreeze exit condition based on the current water inlet side temperature and the current water outlet side temperature comprises:
timing the duration that the current water inlet side temperature and the current water outlet side temperature are both greater than the third temperature limit value based on a third timer, and controlling the third timer to be reset when the current water inlet side temperature or the current water outlet side temperature is less than or equal to the third temperature limit value; wherein the third temperature limit is greater than the second temperature limit;
and acquiring the current timing time of the third timer, and determining that the air-conditioning water system meets a preset anti-freezing exit condition when the current timing time of the third timer is greater than or equal to a third time limit value.
10. An air conditioner water system anti-freezing control device is characterized by comprising:
the monitoring module is used for monitoring the temperature of a water inlet side and the temperature of a water outlet side of the air-conditioning water system;
the judging module is used for judging whether the air-conditioning water system meets a preset freezing protection condition or not based on the temperature of the water inlet side and the temperature of the water outlet side;
and the control module is used for determining that the air conditioning water system is frozen when the air conditioning water system meets the preset freezing protection condition, and performing freezing protection control on the air conditioning water system.
11. An air conditioner comprising a water system, a computer readable storage medium storing a computer program and a processor, the computer program when read and executed by the processor implementing the method of any one of claims 1 to 9.
12. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-9.
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| CN202011618545.0A CN112902400A (en) | 2020-12-30 | 2020-12-30 | Air conditioner water system anti-freezing control method and device and air conditioner |
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| CN202011618545.0A CN112902400A (en) | 2020-12-30 | 2020-12-30 | Air conditioner water system anti-freezing control method and device and air conditioner |
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Cited By (1)
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