CN114087715B

CN114087715B - Anti-freezing control method and device for water system, medium and water system

Info

Publication number: CN114087715B
Application number: CN202111344758.3A
Authority: CN
Inventors: 代骄阳; 周葆林; 陈军平
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-08-26
Anticipated expiration: 2041-11-15
Also published as: CN114087715A

Abstract

The application relates to a method, a device, a computer readable storage medium, a computer program product and a water system for controlling anti-freezing of a water system, the method comprising: acquiring running state information and user state information of a water system, and judging whether a one-stage anti-freezing condition is met or not according to the running state information and the user state information; under the condition of meeting the first-stage anti-freezing condition, controlling a water pump to recover water in a water system to a water tank; acquiring water temperature information of a water tank, and judging whether two-stage anti-freezing conditions are met or not according to the water temperature information; and under the condition of meeting the two-stage anti-freezing condition, controlling the heating device to heat the water in the water tank to a preset temperature threshold value. By adopting the anti-freezing control method for the water system, the water in the water system is concentrated into the water tank, and then the water in the water tank is concentrated and heated when the water temperature needs to be raised, so that the energy loss can be reduced, the heating efficiency is improved, and the energy utilization rate of the freezing control method for the waterproof system is further improved.

Description

Anti-freezing control method and device for water system, medium and water system

Technical Field

The present application relates to the field of air conditioning technologies, and in particular, to a method and an apparatus for controlling freezing prevention of a water system, a computer-readable storage medium, a computer program product, and a water system.

Background

For a water system, under the condition that a unit does not operate in winter, the environmental temperature is possibly lower than the freezing temperature of water, so that the water system is frozen, and potential safety hazards are brought. To avoid freezing, anti-freeze control of the water system is often required.

In the traditional anti-freezing control method of the water system, an anti-freezing temperature sensing bulb is configured to detect the current temperature, and when the current temperature reaches the anti-freezing temperature, the water of the whole water system is heated and circulated to prevent the water system from freezing. In the water flowing process, the circulating pipeline is long, and the heat loss is large, so that the traditional anti-freezing control method for the water system has the defect of low energy utilization rate.

Disclosure of Invention

Based on this, it is necessary to provide a method and an apparatus for controlling freezing prevention of a water system, a computer readable storage medium, a computer program product, and a water system, which can improve the energy utilization rate of a freezing prevention control method of a water system, in order to solve the problem of low energy utilization rate of a conventional freezing prevention control method of a water system.

In a first aspect, the present application provides a method for controlling freezing in a water system. The method comprises the following steps:

acquiring running state information and user state information of a water system, and judging whether a one-stage anti-freezing condition is met or not according to the running state information and the user state information;

under the condition that the first-stage anti-freezing condition is met, controlling a water pump to recover water in the water system to a water tank;

acquiring water temperature information of the water tank, and judging whether a two-stage anti-freezing condition is met according to the water temperature information;

and under the condition of meeting the two-stage anti-freezing condition, controlling a heating device to heat the water in the water tank to a preset temperature threshold value.

In one embodiment, before the acquiring the operating state information and the user state information of the water system and determining whether a stage anti-freezing condition is met according to the operating state information and the user state information, the method further includes:

acquiring temperature information, and judging whether an anti-freezing mode starting condition is met or not according to the temperature information;

and if so, executing the steps of acquiring the running state information and the user state information of the water system and judging whether a stage anti-freezing condition is met according to the running state information and the user state information.

In one embodiment, the acquiring operation state information and user state information of a water system, and determining whether a first-stage anti-freezing condition is met according to the operation state information and the user state information includes:

acquiring running state information of a water system, acquiring user state information under the condition that the running state information is not running, and judging whether a user is at home or not according to the user state information;

if yes, sending prompt information to the user, and judging whether the first-stage anti-freezing condition is met according to the feedback condition of the user; the prompt message is used for reminding the user to start the water system so as to enable the water system to be in a running state;

if not, judging that the one-stage anti-freezing condition is met.

In one embodiment, the heating device comprises a compression heating device and an electric heating device, and the control heating device heats the water in the water tank to a preset temperature threshold value and comprises:

sending a starting instruction to a compression heating device, acquiring feedback information of the compression heating device, and judging whether the compression heating device is normally started or not according to the feedback information;

if so, controlling the compression heating device to work, and heating the water in the water tank to a preset temperature threshold value;

if not, controlling the electric heating device to heat the water in the water tank to a preset temperature threshold value.

In one embodiment, after controlling the heating device to heat the water in the water tank to the preset temperature threshold value in the case that the two-stage anti-freezing condition is met, the method further includes:

acquiring user state information, and judging whether a three-stage anti-freezing condition is met or not according to the user state information;

if so, controlling the water in the water system to be discharged;

if not, returning to the step of acquiring the water temperature information of the water tank and judging whether the two-stage anti-freezing condition is met according to the water temperature information.

In one embodiment, the obtaining the user state information and determining whether the three-stage anti-freezing condition is met according to the user state information includes:

acquiring user state information, and judging whether the user time of staying out of home reaches a preset duration or not according to the user state information;

and under the condition that the user stays out of home for a preset time, acquiring the heating times of the water in the water tank within the user staying out of home, and judging whether the three-stage anti-freezing condition is met according to the heating times.

In one embodiment, the obtaining user state information and determining whether a three-stage anti-freezing condition is met according to the user state information and the user state information includes:

and acquiring weather forecast information under the condition that the user stays out of home for a preset time, and judging whether a three-stage anti-freezing condition is met according to the weather forecast information.

In a second aspect, the application also provides a control device for preventing freezing of a water system. The device comprises:

the anti-freezing stage judgment module is used for acquiring running state information and user state information of a water system and judging whether a one-stage anti-freezing condition is met or not according to the running state information and the user state information; the system is also used for acquiring water temperature information of the water tank and judging whether a two-stage anti-freezing condition is met or not according to the water temperature information;

the recovery module is used for controlling the water pump to recover water in the water system to the water tank under the condition that the first-stage anti-freezing condition is met;

and the heating module is used for controlling a heating device to heat the water in the water tank to a preset temperature threshold value under the condition that the two-stage anti-freezing condition is met.

In one embodiment, the anti-freezing control device for a water system further comprises:

the anti-freezing mode starting condition judging module is used for acquiring temperature information and judging whether an anti-freezing mode starting condition is met or not according to the temperature information;

the anti-freezing stage judgment module is specifically used for acquiring running state information and user state information of a water system under the condition that an anti-freezing mode starting condition is met, and judging whether a stage anti-freezing condition is met or not according to the running state information and the user state information.

In one embodiment, the anti-freeze phase determination module is specifically configured to:

if not, judging that the one-stage anti-freezing condition is met.

In one embodiment, the heating device includes a compression heating device and an electric heating device, and the heating module is specifically configured to:

if so, controlling the compression heating device to work, and heating the water in the water tank to a preset temperature threshold;

In one embodiment, the anti-freeze phase determining module is further configured to:

the anti-freezing control device of the water system also comprises a drainage module which is used for controlling the drainage of water in the water system under the condition of meeting the three-stage anti-freezing condition;

the anti-freezing stage judging module is also used for acquiring the water temperature information of the water tank under the condition that the three-stage anti-freezing condition is not met, and judging whether the two-stage anti-freezing condition is met or not according to the water temperature information.

and under the condition that the user stays out of home for a preset time, acquiring the heating times of the water in the water tank within the user stay out of home, and judging whether the three-stage anti-freezing condition is met according to the heating times.

acquiring user state information, and judging whether the user stay away from home time reaches a preset duration or not according to the user state information;

and acquiring weather forecast information under the condition that the user stays out of home for a preset time, and judging whether the three-stage anti-freezing condition is met or not according to the weather forecast information.

In a third aspect, the present application also provides a computer-readable storage medium. The computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:

and under the condition that the two-stage anti-freezing condition is met, controlling a heating device to heat the water in the water tank to a preset temperature threshold value.

In a fourth aspect, the present application further provides a computer program product. The computer program product comprising a computer program which when executed by a processor performs the steps of:

In a fifth aspect, the present application also provides a water system. The water system comprises a water tank, a water pump, a heating device and a control device; the water tank is connected with the water pump through a circulating pipeline, and the heating device is used for heating water in the water tank; the control device is connected with the water pump and the heating device and is used for realizing the steps of the method.

According to the anti-freezing control method and device for the water system, the computer readable storage medium, the computer program product and the water system, when the one-stage anti-freezing condition is met, the internal machine side water pump is controlled to recycle water in the water system to the water tank, and under the condition that the two-stage anti-freezing condition is met, the heating device is controlled to heat the water in the water tank to the preset temperature threshold value, namely, the water in the water system is firstly concentrated into the water tank, and then the water in the water tank is heated in a concentrated mode when the water temperature needs to be raised, so that the energy loss can be reduced, the heating efficiency is improved, and the energy utilization rate of the anti-freezing control method for the water system is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the description of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the description below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a flow chart of a method for controlling freeze in a water system according to an embodiment;

FIG. 2 is a flowchart illustrating an embodiment of obtaining operating status information and user status information of a water system and determining whether a stage antifreeze condition is satisfied according to the operating status information and the user status information;

FIG. 3 is a flow chart of a method for freeze control of a water system in accordance with another embodiment;

FIG. 4 is a flowchart illustrating an embodiment of obtaining user status information and determining whether a three-stage anti-freeze opening condition is satisfied according to the user status information;

FIG. 5 is a flowchart illustrating another embodiment of obtaining user status information and determining whether a three-stage anti-freeze opening condition is satisfied according to the user status information;

FIG. 6 is a flow chart of a method for freeze control of a water system in accordance with yet another embodiment;

FIG. 7 is a block diagram illustrating the components of an anti-freeze control device for a water system according to an embodiment;

FIG. 8 is a block diagram of the freeze control apparatus for a water system in accordance with another embodiment;

FIG. 9 is a block diagram of the components of the water system in one embodiment;

FIG. 10 is a schematic diagram of the internal machine side part of the water system in one embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

In one embodiment, as shown in fig. 1, there is provided a method for controlling freezing prevention of a water system, comprising steps S102 to S105.

Step S102: and acquiring running state information and user state information of the water system, and judging whether a stage anti-freezing condition is met or not according to the running state information and the user state information.

The user status information may be access control information, sound information, or location information. Specifically, the control device can acquire door opening and closing information recorded by the door control system and door opening and closing information such as picture information shot by a camera during door opening and closing by connecting the door control system, and judge whether a user is at home or not according to the door opening and closing information; the method comprises the steps of acquiring sound information by connecting a sound acquisition device, extracting audio fingerprint characteristics in the sound information, comparing the audio fingerprint characteristics with preset audio characteristics, and judging whether a user is at home or not; or, the position information of the user is further acquired by acquiring the positioning information of the mobile phone of the user, and whether the user is at home is judged according to the position information of the user.

It should be noted that the user status information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.

Further, the water system is a system in which water is used as a carrier and water subjected to cooling or heating flows in a pipeline. The water system in the application specifically refers to the air conditioning water system who is used for adjusting room temperature, possesses heating and refrigeration function. The water system is in an operation state, and particularly means that a unit in the water system is in a heating operation mode. It can be understood that in cold winter, if the user is at home, the air conditioner is usually turned on, and at the moment, the water system unit works in the heating operation mode without freezing risk.

Specifically, the control device acquires the running state information and the user state information of the water system, and judges whether the specific process of meeting the one-stage anti-freezing condition is not unique according to the running state information and the user state information. For example, the control device may obtain the running state information and the user state information of the water system, judge whether the water system is in a running state according to the running state information, judge whether the user is at home according to the user state information, and judge that the one-stage anti-freezing condition is satisfied under the condition that the water system is not running and the user is not at home; the control device can also acquire the running state information of the water system firstly, judge whether the water system is in the running state according to the running state information, acquire the user state information if the water system is not in the running state, judge whether the user is at home according to the user state information, and judge that the anti-freezing condition at one stage is met if the user is not at home.

Step S103: and under the condition of meeting the one-stage anti-freezing condition, controlling the water pump to recover water in the water system to the water tank.

Specifically, under the condition that the first-stage anti-freezing condition is met, the control device controls the water pump to recycle water in the pipeline of the water system to the water tank, so that freezing and volume expansion of the water in the pipeline are avoided, and the pipeline is prevented from being frozen and cracked. Furthermore, the control device can control the water pump to recover water in the whole water system to the water tank so as to avoid the risk of frost cracking of the pipeline; the control device can also control the water pump to recover a part of water in the pipeline to the water tank according to specific parameters of the pipeline, so that the water pipe cannot be frozen after the remaining water in the pipeline is frozen, the requirement on the volume of the water tank is reduced, and the energy consumption is reduced.

It can be understood that, under the condition that the first-stage anti-freezing condition is not met, the control device acquires the running state information and the user state information of the water system again at a certain frequency, judges whether the first-stage anti-freezing condition is met or not according to the latest acquired running state information and user state information, and performs corresponding anti-freezing control according to the judgment result.

Step S104: and acquiring water temperature information of the water tank, and judging whether the two-stage anti-freezing condition is met according to the water temperature information.

The specific content of the two-stage anti-freezing condition is not unique, and for example, the specific content may be that the water temperature in the water tank is lower than a set temperature threshold, and/or the currently acquired water temperature in the water tank is lower than the water temperature in the water tank acquired at the previous moment. Specifically, a temperature detection device may be configured to detect the water temperature in the water tank, obtain water temperature information and send the water temperature information to the control device, the control device obtains the water temperature information of the water tank, and the control device determines whether the two-stage anti-freezing condition is currently met according to the water temperature information and a preset two-stage anti-freezing condition.

Step S105: and under the condition of meeting the two-stage anti-freezing condition, controlling the heating device to heat the water in the water tank to a preset temperature threshold value.

Wherein the preset temperature threshold should be higher than the ambient temperature and the freezing temperature of water. The specific type of heating means is not exclusive and may be, for example, an electric heating means or a gas heating means. Specifically, under the condition that the two-stage anti-freezing condition is met, the water in the water tank is frozen, at the moment, the control device controls the heating device to work, the water in the water tank is heated to a preset temperature threshold value, and the water in the water tank is prevented from being frozen due to too low water temperature.

It should be noted that, in the above heating process, the water pump of the water system is not turned on, that is, the water circulation is stopped in the heating process, so as to further reduce the heat loss. Further, under the condition that the two-stage anti-freezing condition is not met, the control device acquires the water temperature information of the water tank again at a certain frequency, judges whether the two-stage anti-freezing condition is met or not according to the latest acquired water temperature information, and performs corresponding anti-freezing control according to a judgment result; when the water in the water tank is heated to the preset temperature threshold, the control device also needs to acquire the water temperature information of the water tank again at a certain frequency, judge whether the two-stage anti-freezing condition is met or not according to the latest acquired water temperature information, and perform corresponding anti-freezing control according to the judgment result.

According to the anti-freezing control method for the water system, when the one-stage anti-freezing condition is met, the internal machine side water pump is controlled to recycle water in the water system to the water tank, and the heating device is controlled to heat the water in the water tank to the preset temperature threshold value under the condition that the two-stage anti-freezing condition is met, on one hand, different anti-freezing conditions are set according to specific conditions, different anti-freezing measures are executed at different anti-freezing stages, namely differential anti-freezing control is performed according to actual conditions, and the scientificity of the anti-freezing control method for the water system is improved; on the other hand, the water in the water system is concentrated into the water tank, and then the water in the water tank is concentrated and heated when the water temperature needs to be raised, so that the energy loss can be reduced, the heating efficiency is improved, and the energy utilization rate of the anti-freezing control method of the water system is further improved.

In one embodiment, as shown in fig. 2, step S102 includes steps S201 to S203.

Step S201: the method comprises the steps of obtaining running state information of a water system, obtaining user state information under the condition that the running state information is not running, and judging whether a user is at home or not according to the user state information.

As mentioned above, the water system is in an operating state, specifically, the unit in the water system is in a heating operation mode, based on which, the operation state information of the water system is not in an operating state, that is, the unit is not in the heating operation mode, for example, the unit is in a standby or off state, or in an air supply mode. For the specific definition of the user status information and whether the user is at home according to the user status information, the above description is omitted here. Specifically, the control device acquires the running state information of the water system, acquires the user state information under the condition that the running state information is not running, and judges whether the user is at home or not according to the user state information.

If the user is at home, step S202 is executed: and sending prompt information to the user, and judging whether the first-stage anti-freezing condition is met according to the feedback condition of the user.

The prompt information is used for reminding a user to start the water system so as to enable the water system to be in an operating state and further avoid the water system from being frozen. The specific content of the prompt message is not exclusive and can be sound, text or a combination of the two. The specific way of sending the prompt message to the user by the control device is not unique, and for example, the prompt message can be sent to a display panel of the water system and displayed through the display panel, or the prompt message can be sent to a user terminal through a communication device.

Further, after the control device sends the prompt message to the user, it needs to judge whether the first-stage anti-freezing condition is met according to the feedback condition of the user: if the water system is not started by a user within a preset time or after the prompt of preset times, judging that the one-stage anti-freezing condition is met; otherwise, judging that the first-stage antifreezing condition is not met. It is understood that the specific values of the preset time and the preset number are not exclusive, for example, the preset time may be 4 minutes, 5 minutes or 6 minutes, and the preset number may be 2, 3 or 4.

If the user is not at home, step S203 is executed: and judging that the first-stage anti-freezing condition is met. Specifically, under the condition that the water system is not operated and a user is not at home, the water system has freezing risks, the freezing prevention condition at one stage is directly judged to be met, the water pump is controlled to recycle water in the water system to the water tank, and the pipeline is prevented from freezing and cracking.

In the embodiment, different one-stage anti-freezing conditions are provided according to different user state information, so that the matching degree of the anti-freezing control method of the water system and an actual application scene is improved.

In one embodiment, the heating device comprises a compression heating device and an electric heating device, and the control of the heating device to heat the water in the water tank to the preset temperature threshold comprises: sending a starting instruction to a compression heating device, acquiring feedback information of the compression heating device, and judging whether the compression heating device is normally started or not according to the feedback information; if so, controlling the compression heating device to work, and heating the water in the water tank to a preset temperature threshold value; if not, controlling the electric heating device to heat the water in the water tank to a preset temperature threshold value.

The compression heating device comprises a compressor and a heat exchanger, the heat exchanger is arranged in the water tank, and the heating process is substantially a process of converting chemical energy of a refrigerant into heat energy, and the compression heating device comprises the following components: refrigerant is compressed into high-temperature high-pressure steam by a compressor and flows through a heat exchanger, the high-pressure steam is liquefied and releases heat in the heat exchanger, the heat exchange is carried out between the high-pressure steam and water in a water tank, and the water temperature is increased. Further, the electric heating device is a heating device that converts electric energy into thermal energy using joule effect of electric current to heat an object. The specific type of the electric heating device is not exclusive and may be, for example, a direct resistance heating device or an indirect resistance heating device.

Specifically, after the control device sends a starting instruction to the compression heating device, feedback information of the compression heating device is obtained, whether the compression heating device is normally started or not is judged according to the feedback information, if the compression heating device is normally started, the compression heating device is controlled to work, and water in the water tank is heated to a preset temperature threshold value. If the compression heating device is not normally started, the compression heating device is indicated to be possibly broken down, and at the moment, the electric heating device is controlled to heat the water in the water tank to a preset temperature threshold value.

In the above embodiment, two heating devices are configured to heat water in the water tank, so that the water in the water tank can be heated to the preset temperature threshold value even when the compressor fails, thereby preventing the water in the water tank from freezing, and facilitating improvement of the anti-freezing effect of the anti-freezing control method for the water system.

In one embodiment, as shown in fig. 3, before step S102, step S101 is further included: and acquiring temperature information, and judging whether the anti-freezing mode starting condition is met or not according to the temperature information.

Wherein the temperature information comprises ambient temperature information, and/or water temperature information in the water system. Correspondingly, the antifreeze mode activation condition comprises an ambient temperature, and/or a temperature of water in the water system being below a corresponding temperature threshold.

Specifically, when the ambient temperature is lower than a preset ambient temperature threshold, the temperature of water in the water system may be lowered due to the excessively low ambient temperature, resulting in freezing; when the water temperature in the water system is below a preset water temperature threshold, there is a risk of freezing the water in the water system. The control device acquires temperature information and judges whether the current anti-freezing mode opening condition is met or not according to the temperature information and a preset anti-freezing mode opening condition: if yes, the water system is frozen, step S102 is executed, the running state information and the user state information of the water system are obtained, and whether the one-stage anti-freezing condition is met is judged according to the running state information and the user state information; if not, the step of obtaining the temperature information is continued and whether the starting condition of the anti-freezing mode is met or not is judged according to the temperature information, which indicates that the water system does not have the freezing risk at the moment.

In the above embodiment, before the first-stage anti-freezing condition is determined, the temperature information is obtained, and whether the anti-freezing mode starting condition is met is determined according to the temperature information, so that the subsequent anti-freezing control step can be performed only when the water system is at a freezing risk, and the accuracy of the anti-freezing control method for the water system is further improved.

In an embodiment, with continuing reference to fig. 3, after step S105, the method further includes step S106: and acquiring user state information, and judging whether the three-stage anti-freezing condition is met or not according to the user state information.

The specific content of the three-stage anti-freezing condition is not unique, and for example, the specific content may be that the user stays away from home for a preset time; the user can continuously stay out of home for a preset time, and the heating frequency of the water in the water tank reaches the set frequency in the user continuously stay out of home; the time that the user stays out of home can reach the preset time, and the low-temperature weather can continue to set the time; it is also possible that the user continues the away-from-home time for a preset time period, and the number of times the user continues to heat the water in the water tank away from home time reaches a set number of times, and the low temperature weather will continue for the set time period.

In one embodiment, as shown in fig. 4, step S106 includes step S401 and step S402.

Step S401: and acquiring user state information, and judging whether the user time of staying out of home reaches a preset time length according to the user state information.

The specific value of the preset time period is not exclusive, and may be, for example, 2 days, 3 days, or 4 days. Specifically, the control device acquires the user state information, calculates the user absence duration according to the user state information, and judges whether the user absence duration reaches the preset duration.

Step S402: and under the condition that the user stays out of home for a preset time, acquiring the heating times of the water in the water tank in the time that the user stays out of home, and judging whether the three-stage anti-freezing condition is met according to the heating times.

The specific number of times is not exclusive, and may be 4, 5, or 6 times, for example. As described above, if the two-stage anti-freezing condition is satisfied, the control device controls the heating device to heat the water in the water tank to the preset temperature threshold. However, if the water system is continuously in the non-running state, the water in the water tank exchanges heat with the environment, the water temperature drops again, and when the water system meets the two-stage anti-freezing condition again, the control device controls the heating device to heat the water in the water tank to the preset temperature threshold again, so that the circulation is performed, the user continuously does not stay at home, the two-stage anti-freezing condition can be met for multiple times, and the heating frequency of the water in the water tank can reach multiple times.

Specifically, under the condition that the user stays out of home for a preset time, the control device acquires the heating times of the water in the water tank within the time that the user stays out of home, and judges that the three-stage anti-freezing condition is met and new anti-freezing measures need to be taken when the heating times reach the set times according to the relation between the heating times and the set times.

In another embodiment, as shown in fig. 5, step S106 includes step S401 and step S403.

Step S403: and under the condition that the user does not stay at home for a preset time, acquiring weather forecast information, and judging whether the three-stage anti-freezing condition is met or not according to the weather forecast information.

Specifically, under the condition that the user does not stay at home for a preset time, the control device acquires weather forecast information, determines the duration that the future air temperature is lower than the preset air temperature threshold value according to the weather forecast information, and if the duration reaches the set time, the control device indicates that the low-temperature weather at least continues for the set time, and possibly needs to heat the water in the water tank for multiple times according to the current anti-freezing measures, and at the moment, judges that the three-stage anti-freezing condition is met and needs to take new anti-freezing measures.

It can be understood that the heating times of the water in the water tank are too many, on one hand, energy consumption is too large, on the other hand, the service life of the heating device can be reduced due to frequent starting of the heating device, and on the basis, whether the three-stage anti-freezing condition is met or not is comprehensively judged according to the time that a user is continuously away from home and the heating times or weather forecast information of the water in the water tank, so that the energy consumption is saved, and meanwhile, the service life of the heating device is prolonged.

Further, with continued reference to fig. 3, in the case that the three-stage anti-freezing condition is satisfied, the step S107 is executed: controlling the discharge of water from the water system. Specifically, the control device can control the water pump and the two-way valve to discharge water in the water system. The two-way valve is communicated with a circulating pipeline and a drain pipe in the water system, a water pump is arranged on the circulating pipeline, the two-way valve is controlled to be started, and the water pump is started to discharge water in the water system to the outside of the water system. It can be understood that if the control device controls the water pump to recycle the water in the whole water system to the water tank in step S103, the control of the water discharge in the water system in step S107 means the control of the water discharge in the water tank; if the control device controls the water pump to recycle a part of the water in the pipeline to the water tank in step S103, the control of the water discharge in the water system in step S107 means controlling the water in the water tank and the remaining water in the pipeline to be discharged.

In addition, after the water in the water system is controlled to be discharged, alarm information can be output to prompt a user that the current water system is in a water-free state, and the unit is not allowed to be started up forcibly to run. The specific content and output mode of the alarm information are not unique. For example, the specific content may be sound, text, or a combination of both; the output means may be to a display panel of the water system or sent to a user terminal via a communication device. Furthermore, after the water in the water system is controlled to be discharged, if the user is determined to go home according to the user state information, the water system is controlled to add water, the water pumps on the inner side and the outer side of the water system are controlled to operate, the water in the water system is circulated, and the air in the water system is emptied, so that the water system can respond to the starting-up requirement of the user in time.

It is understood that, in the case where the three-stage freezing prevention condition is not satisfied, the process returns to step S104, and the step of acquiring the water temperature information of the water tank and determining whether the two-stage freezing prevention condition is satisfied according to the water temperature information is performed.

It should be noted that, if the user is not at home continuously, the whole anti-freezing control process does not meet the three-stage anti-freezing condition, and the water in the water system is not drained, the heating device is controlled to raise the water temperature in the water tank after the user returns home according to the user state information, and the prompt information is sent to prompt the user to start the water system unit after the water temperature reaches the set water temperature. After a user starts a water system unit or the time of the user returning home reaches the set time of returning home, the water pumps on the inner machine side and the outer machine side in the water system are controlled to operate firstly, water in the water system is circulated, after the water pumps operate for the set time, air in the water system is exhausted, and then the heating device is controlled to further raise the water temperature of the water system, so that the water system unit can operate normally.

Further, when the three-stage anti-freezing condition is not met and water in the water system is not emptied, environment temperature information can be obtained, whether the environment temperature reaches a preset environment temperature threshold value or not is judged, if the environment temperature reaches the preset environment temperature threshold value, the freezing risk of the water system is low at the moment, the water pumps on the inner machine side and the outer machine side are controlled to be started, the water in the water system is circulated, air is discharged, and conditions are provided for normal operation of a subsequent water system.

In the embodiment, when the three-stage anti-freezing condition is met, water is discharged from the water system, so that frequent starting of the heating device can be avoided, and the anti-freezing effect is ensured, and meanwhile, the energy is saved.

It should be noted that, the preset values and the set values in the above embodiments, such as the preset threshold, the preset time, the set time, the ambient temperature threshold, the water temperature threshold, and the like, may be set correspondingly according to the historical operating state information of the water system.

For the sake of understanding, the specific process of the anti-freezing control method of the water system will be described in detail with reference to fig. 6.

Specifically, as shown in fig. 6, the control device first obtains temperature information, and determines whether the current antifreeze mode start condition is satisfied according to the temperature information and a preset antifreeze mode start condition: if yes, indicating that the water system has a freezing risk, acquiring running state information of the water system, and judging whether a unit of the water system is in a running state; if not, the step of obtaining the temperature information is continued and whether the starting condition of the anti-freezing mode is met or not is judged according to the temperature information, which indicates that the water system does not have the freezing risk at the moment. The temperature information comprises environment temperature information and water temperature information in the water system, and the unit of the water system is in an operating state, specifically, the unit of the water system is in a heating operating mode.

If the unit is in the running state, the freezing risk does not exist at the moment, the step of obtaining temperature information is returned, and whether the starting condition of the anti-freezing mode is met or not is judged according to the temperature information; and if the unit is not in the running state, acquiring access control information, and judging whether the user is out of the door according to the access control information. If yes, the user is not at home, the user directly judges that the one-stage anti-freezing condition is met, the one-stage anti-freezing stage is entered, the internal machine side water pump is controlled to be started, and water in the water system is recycled to the water tank; if not, the user is at home, and at the moment, prompt information is sent to the user to remind the user to start the water system so as to enable the water system to be in a running state, and further the water system is prevented from being frozen. If the user does not respond within the preset time and the water system is not started yet, judging that the one-stage anti-freezing condition is met, entering the anti-freezing one stage, controlling a water pump on the inner machine side to be started, and recovering water in the water system to a water tank.

The method comprises the steps of recovering water in a water system to a water tank, obtaining water temperature information in the water tank, judging whether the water in the water tank has a freezing risk or not when the water temperature in the water tank is lower than a set temperature threshold value and the water temperature in the water tank obtained at the previous moment is lower than the water temperature in the water tank obtained at the previous moment, meeting two-stage anti-freezing conditions, entering an anti-freezing stage, and controlling a heating device to heat the water in the water tank until the water temperature is increased to the preset temperature threshold value. If the water in the water tank has no freezing risk, the control device acquires the water temperature information of the water tank again at a certain frequency, and judges whether the water in the water tank has the freezing risk or not according to the latest acquired water temperature information. When the water in the water tank is heated to the preset temperature threshold, the control device also needs to acquire the water temperature information of the water tank again at a certain frequency, and judges whether the two-stage anti-freezing condition is met or not according to the latest acquired water temperature information, if so, the control device enters the anti-freezing stage again, and controls the heating device to heat the water in the water tank until the water temperature is increased to the preset temperature threshold. In the heating process, the water pumps on the inner machine side and the outer machine side are not started, and the water in the water tank does not enter the pipeline for circulation.

Further, heating device includes compression heating device and electric heater unit, and control heating device heats the water in the water tank to predetermineeing the temperature threshold value, includes: sending a starting instruction to a compression heating device, acquiring feedback information of the compression heating device, and judging whether the compression heating device is normally started or not according to the feedback information; if so, controlling the compression heating device to work, and heating the water in the water tank to a preset temperature threshold value; if not, controlling the electric heating device to heat the water in the water tank to a preset temperature threshold value. Two heating devices are configured for heating water in the water tank, so that the water in the water tank can be heated to a preset temperature threshold value under the condition that the compressor fails, the water in the water tank is prevented from freezing, and the anti-freezing effect of the anti-freezing control method of the water system is improved.

And after the heating device is controlled to heat water in the water tank, acquiring the access control information again, and judging whether the time that the user does not stay at home reaches the preset duration or not according to the access control information. If not, returning to the step of acquiring the water temperature information in the water tank and judging whether the water in the water tank has the freezing risk or not according to the water temperature information. If yes, the heating times of the water in the water tank and weather forecast information of the user in the time of staying out of home are obtained, and whether the three-stage anti-freezing condition is met or not is judged according to the heating times and/or the weather forecast information. And when the heating frequency of the water in the water tank reaches the set frequency and/or the low-temperature weather lasts for the set time, judging that the three-stage anti-freezing condition is met currently, entering an anti-freezing stage, controlling the two-way valve to open, discharging the water in the water system, and outputting alarm information. And under the condition that the three-stage anti-freezing condition is not met, returning to the step of acquiring the water temperature information of the water tank and judging whether the two-stage anti-freezing condition is met according to the water temperature information.

It should be noted that, if the user is not at home continuously, the entire anti-freezing control process of the water system does not meet the three-stage anti-freezing condition, and the water in the water system is not drained, the heating device is controlled to raise the water temperature in the water tank after the user returns home according to the user state information, and the prompt information is sent to prompt the user to start the water system unit after the water temperature reaches the set water temperature. After a user starts a water system unit or the time of the user returning home reaches the set time of returning home, the water pumps on the inner machine side and the outer machine side in the water system are controlled to operate firstly, water in the water system is circulated, after the water pumps operate for the set time, air in the water system is exhausted, and then the heating device is controlled to further raise the water temperature of the water system, so that the water system unit can operate normally.

Further, when the three-stage anti-freezing condition is not met and water in the water system is not drained, environment temperature information can be obtained, whether the environment temperature reaches a preset environment temperature threshold value or not is judged, if the environment temperature reaches the preset environment temperature threshold value, the water system is low in freezing risk, at the moment, the water pumps on the inner side and the outer side are controlled to be started, water in the water system is circulated, air is exhausted, and conditions are provided for normal operation of a subsequent water system.

According to the anti-freezing control method for the water system, before the first-stage anti-freezing condition is judged, the temperature information is obtained, whether the anti-freezing mode starting condition is met or not is judged according to the temperature information, the subsequent anti-freezing control step can be carried out under the condition that the water system has a freezing risk, and the accuracy of the anti-freezing control method for the water system is improved. In the process of anti-freezing control, different anti-freezing conditions are set according to specific conditions, and different anti-freezing measures are executed at different anti-freezing stages, which is equivalent to differential anti-freezing control according to actual conditions, and is beneficial to improving the scientificity of the anti-freezing control method of the water system; the water in the water system is concentrated into the water tank, and then the water in the water tank is concentrated and heated when the water temperature needs to be raised, so that the energy loss can be reduced, the heating efficiency is improved, and the energy utilization rate of the anti-freezing control method of the water system is further improved; according to the time that the user is not at home continuously, the heating times of water in the water tank and/or weather forecast information, whether the three-stage anti-freezing condition is met or not is judged comprehensively, and when the three-stage anti-freezing condition is met, water is discharged from the water system, so that frequent starting of the heating device can be avoided, the anti-freezing effect is ensured, and meanwhile, energy conservation and the service life of the heating device are facilitated.

It should be understood that, although the steps in the flowcharts related to the embodiments described above are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the application also provides a water system anti-freezing control device for realizing the water system anti-freezing control method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the method, so specific limitations in one or more embodiments of the anti-freezing control device for the water system provided below can be referred to the limitations on the anti-freezing control method for the water system, and are not described again here.

In one embodiment, as shown in fig. 7, there is provided an anti-freezing control device 700 for a water system, comprising an anti-freezing stage determining module 702, a recycling module 703 and a heating module 704, wherein:

an anti-freezing stage judgment module 702, configured to obtain operation state information and user state information of the water system, and judge whether a one-stage anti-freezing condition is met according to the operation state information and the user state information; the system is also used for acquiring water temperature information of the water tank and judging whether a two-stage anti-freezing condition is met or not according to the water temperature information;

the recovery module 703 is used for controlling the water pump to recover water in the water system to the water tank under the condition that the first-stage anti-freezing condition is met;

and the heating module 704 is used for controlling the heating device to heat the water in the water tank to a preset temperature threshold value under the condition that the two-stage anti-freezing condition is met.

In one embodiment, as shown in fig. 8, the anti-freezing control device 700 for water system further includes an anti-freezing mode starting condition determining module 701, configured to obtain temperature information, and determine whether an anti-freezing mode starting condition is met according to the temperature information. The anti-freeze stage determining module 702 is specifically configured to, when the anti-freeze mode starting condition is met, obtain operation state information and user state information of the water system, and determine whether a stage anti-freeze condition is met according to the operation state information and the user state information.

In one embodiment, the anti-freeze phase determination module 702 is specifically configured to: acquiring running state information of a water system, acquiring user state information under the condition that the running state information is not running, and judging whether a user is at home or not according to the user state information; if yes, sending prompt information to the user, and judging whether the first-stage anti-freezing condition is met according to the feedback condition of the user; the prompt message is used for reminding a user to start the water system so as to enable the water system to be in a running state; if not, judging that the one-stage anti-freezing condition is met.

In one embodiment, the heating device includes a compression heating device and an electric heating device, and the heating module 704 is specifically configured to: sending a starting instruction to the compression heating device, acquiring feedback information of the compression heating device, and judging whether the compression heating device is normally started or not according to the feedback information; if so, controlling the compression heating device to work, and heating the water in the water tank to a preset temperature threshold value; if not, controlling the electric heating device to heat the water in the water tank to a preset temperature threshold value.

In an embodiment, the anti-freeze phase determining module 702 is further configured to obtain the user status information, and determine whether the three-phase anti-freeze condition is satisfied according to the user status information. With continued reference to fig. 8, the water system anti-freeze control apparatus 700 further includes a drain module 705 for controlling the draining of water from the water system when the three-stage anti-freeze condition is satisfied. The anti-freezing stage determining module 702 is further configured to obtain water temperature information of the water tank when the three-stage anti-freezing condition is not met, and determine whether the two-stage anti-freezing condition is met according to the water temperature information.

In one embodiment, the anti-freeze phase determination module 702 is specifically configured to: acquiring user state information, and judging whether the user time of staying out of home reaches a preset duration or not according to the user state information; and under the condition that the user stays out of home for a preset time, acquiring the heating times of the water in the water tank in the user staying out of home, and judging whether the three-stage anti-freezing condition is met according to the heating times.

In one embodiment, the anti-freeze phase determination module 702 is specifically configured to: acquiring user state information, and judging whether the user time of staying out of home reaches a preset duration or not according to the user state information; and under the condition that the user does not stay at home for a preset time, acquiring weather forecast information, and judging whether the three-stage anti-freezing condition is met or not according to the weather forecast information.

All modules in the anti-freezing control device for the water system can be completely or partially realized through software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.

In an embodiment, a computer program product is provided, comprising a computer program which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high-density embedded nonvolatile Memory, resistive Random Access Memory (ReRAM), Magnetic Random Access Memory (MRAM), Ferroelectric Random Access Memory (FRAM), Phase Change Memory (PCM), graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases referred to in various embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.

In one embodiment, a water system is provided. As shown in fig. 9, the water system comprises a water tank 901, a water pump 902, a heating device 903 and a control device 904. The water tank 901 is connected to a water pump 902 through a circulation line, and a heating device 903 is used for heating water in the water tank 901. The control device 904 is connected with the water pump 902 and the heating device 903, and is used for implementing the steps of the anti-freezing control method for the water system in the embodiment.

Here, the water tank 901 is a container for storing water, and the shape of the water tank 901 is not exclusive, and may be, for example, a cylinder or a rectangular parallelepiped. The water pump 902 is a mechanical device that delivers or pressurizes a liquid. The water pump 902 may be a positive displacement pump or a vane pump. The heating device 903 may be an electric heating device or a gas heating device.

For specific limitations of the method for controlling freezing prevention of a water system, see above, no further description is given here. Specifically, the heating device 903 is used for heating water in the water tank 901; the water pump 902 is connected to the water tank 901 through a circulation line 905, and by controlling the water pump 902, water in the line can be recovered to the water tank 901, and the water in the water tank 901 and the line can also be discharged out of the water system.

In one embodiment, the heating device 903 comprises an electric heating device and a compression heating device; the water system further comprises an internal machine 906 and an external machine (not shown), and correspondingly, the water pump 902 comprises an internal machine-side water pump 902-1 and an external machine-side water pump (not shown). Wherein the compression heating device comprises a compressor (not shown) and a heat exchanger 903-1. A heat exchanger 903-1 and an electric heating device 903-2 are disposed in the water tank 901. The water tank 901 is arranged on the inner machine side, and water in the pipeline can be recovered to the water tank 901 by controlling the water pump 902-1 on the inner machine side, and the water in the water tank 901 can also be discharged out of a water system.

Further, as shown in fig. 10, a two-way valve 908 is provided between the circulation pipe 905 and the drain pipe 907 inside the water system. The control device 904 is connected to the two-way valve 908, and water in the water system can be discharged to the outside by controlling the two-way valve 908 to be opened and activating the water pump 902.

According to the water system, before the first-stage anti-freezing condition is judged, the temperature information is obtained, whether the anti-freezing mode starting condition is met or not is judged according to the temperature information, the subsequent anti-freezing control step can be carried out under the condition that the water system has a freezing risk, and the accuracy of the anti-freezing control method of the water system is improved. In the process of anti-freezing control, different anti-freezing conditions are set according to specific conditions, and different anti-freezing measures are executed at different anti-freezing stages, which is equivalent to differential anti-freezing control according to actual conditions, and is beneficial to improving the scientificity of the anti-freezing control method of the water system; the water in the water system is concentrated into the water tank, and then the water in the water tank is concentrated and heated when the water temperature needs to be raised, so that the energy loss can be reduced, the heating efficiency is improved, and the energy utilization rate of the anti-freezing control method of the water system is further improved; according to the time that the user is not at home continuously, the heating times of water in the water tank and/or weather forecast information, whether the three-stage anti-freezing condition is met or not is judged comprehensively, and when the three-stage anti-freezing condition is met, water is discharged from the water system, so that frequent starting of the heating device can be avoided, the anti-freezing effect is ensured, and meanwhile, energy conservation and the service life of the heating device are facilitated.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An anti-freezing control method for an air conditioning water system is characterized by comprising the following steps:

under the condition that a water system meets an anti-freezing mode starting condition, acquiring running state information and user state information of the water system, and judging whether a one-stage anti-freezing condition is met according to the running state information and the user state information; the first-stage anti-freezing condition is that a unit in the water system is not in a heating operation mode and a user is not at home;

under the condition that the two-stage anti-freezing condition is met, controlling a heating device to heat water in the water tank to a preset temperature threshold; the two-stage anti-freezing condition is that the water temperature in the water tank is lower than a set temperature threshold value, and/or the currently acquired water temperature in the water tank is lower than the water temperature in the water tank acquired at the last moment.

2. The method for controlling anti-freezing of an air conditioning water system as claimed in claim 1, wherein before the step of obtaining the operation state information and the user state information of the water system and determining whether the first-stage anti-freezing condition is satisfied according to the operation state information and the user state information, the method further comprises:

acquiring temperature information, and judging whether an anti-freezing mode starting condition is met or not according to the temperature information; the temperature information comprises ambient temperature information and/or water temperature information in a water system; the anti-freezing mode starting condition comprises that the environment temperature is lower than a temperature threshold corresponding to the environment temperature, and/or the water temperature in the water system is lower than a temperature threshold corresponding to the water temperature of the water system;

3. The method for controlling anti-freezing of an air conditioning water system as claimed in claim 1, wherein the step of obtaining the running state information and the user state information of the water system and judging whether the first-stage anti-freezing condition is satisfied according to the running state information and the user state information comprises the steps of:

acquiring running state information of the water system, acquiring user state information under the condition that a unit in the water system is not in a heating running mode, and judging whether a user is at home or not according to the user state information;

if yes, sending prompt information to the user, and judging whether the first-stage anti-freezing condition is met according to the feedback condition of the user; the prompt message is used for reminding the user to control the unit in the water system to operate in a heating operation mode;

if not, judging that the one-stage anti-freezing condition is met.

4. The method as claimed in claim 1, wherein the heating device comprises a compression heating device and an electric heating device, and the controlling the heating device to heat the water in the water tank to a preset temperature threshold comprises:

sending a starting instruction to a compression heating device, acquiring feedback information of the compression heating device, and judging whether the compression heating device is normally started or not according to the feedback information; the compression heating device comprises a compressor and a heat exchanger, and the heat exchanger is arranged in the water tank;

5. The method for controlling anti-freezing of an air conditioning water system as claimed in any one of claims 1 to 4, wherein the controlling the heating device to heat the water in the water tank to a preset temperature threshold value after the condition of meeting the two-stage anti-freezing condition further comprises:

if so, controlling the water in the water system to be discharged;

6. The method as claimed in any one of claims 1 to 4, wherein after controlling the heating device to heat the water in the water tank to a preset temperature threshold value in case of meeting the two-stage anti-freezing condition, the method further comprises:

under the condition that the user stays out of home for a preset time, acquiring the heating times of the water in the water tank within the user stay out of home, and judging whether the heating times reach set times or not;

if so, controlling the water in the water system to be discharged;

7. The method as claimed in any one of claims 1 to 4, wherein after controlling the heating device to heat the water in the water tank to a preset temperature threshold value in case of meeting the two-stage anti-freezing condition, the method further comprises:

under the condition that the user time is not at home and reaches a preset time, obtaining the duration of which the future air temperature is lower than a preset air temperature threshold value, and judging whether the duration reaches a set time;

if so, controlling the water in the water system to be discharged;

if not, returning to the step of acquiring the water temperature information of the water tank and judging whether the two-stage anti-freezing condition is met or not according to the water temperature information.

8. An anti-freezing control device for an air conditioner water system, the device comprising:

the system comprises an anti-freezing stage judging module, a first-stage anti-freezing judging module and a second-stage anti-freezing judging module, wherein the anti-freezing stage judging module is used for acquiring running state information and user state information of a water system under the condition that the water system meets an anti-freezing mode starting condition, and judging whether a first-stage anti-freezing condition is met or not according to the running state information and the user state information; the anti-freezing condition judging module is also used for acquiring water temperature information of the water tank and judging whether two-stage anti-freezing conditions are met or not according to the water temperature information; the first-stage anti-freezing condition is that a unit in the water system is not in a heating operation mode and a user is not at home; the two-stage anti-freezing condition is that the water temperature in the water tank is lower than a set temperature threshold value, and/or the currently acquired water temperature in the water tank is lower than the water temperature in the water tank acquired at the last moment;

9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 7.

10. An air conditioning water system is characterized by comprising a water tank, a water pump, a heating device and a control device; the water tank is connected with the water pump through a circulating pipeline, and the heating device is used for heating water in the water tank; the control device is connected with the water pump and the heating device and is used for realizing the steps of the method of any one of claims 1 to 7.