Fan coil heating protection method, device and equipment and storage medium

Abstract

The embodiment of the invention discloses a fan coil heating protection method and device, equipment and a storage medium, and the method comprises the steps: periodically obtaining the environment temperature of a target environment when a fan coil is in a shutdown state; when the environment temperature is in the temperature reduction trend, the temperature reduction rate of the target environment is determined; acquiring a first pipe body temperature of the fan coil, and predicting a first temperature drop time based on the first pipe body temperature and the temperature drop rate; whether the first temperature drop time is smaller than a preset first time threshold value or not is judged; and when it is judged that the first temperature drop time is smaller than the first time threshold value, a heating element outside the fan coil is started to heat the fan coil. According to the fan coil heating protection method disclosed by the invention, the problem that the volume of water in the fan coil is expanded after the water in the fan coil is frozen and the tube bank is damaged due to too low environment temperature is solved, so that the occurrence probability of the situation that the volume of the water in the fan coil is expanded after the water in the fan coil is frozen and the tube bank is damaged due to too low environment temperature is effectively reduced; the maintenance cost is saved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of air conditioners, and in particular to a fan coil heating protection method, device, equipment and storage medium. Background Art

[0002] Central air conditioning is a general term for centralized and semi-centralized air conditioning. Its system consists of one or more cold and heat source systems and multiple air conditioning systems. Central air conditioning is now widely used in various places such as office buildings and shopping malls, and its application area is becoming more and more extensive.

[0003] In some technologies, the fan coil unit is one of the terminal devices of the air conditioning system, which is composed of a small fan, a motor and a coil (air heat exchanger). When chilled water or hot water flows through the coil tube, it exchanges heat with the air outside the tube, so that the air is cooled, dehumidified or heated, thereby adjusting the indoor air parameters. The working principle of the fan coil unit is to drive the air through the coil (air heat exchanger) through a small fan and a motor, and exchange heat with the chilled water or hot water flowing in the exhaust pipe.

[0004] However, in areas with lower temperatures, when the central air-conditioning unit is shut down and not in use for a period of time, if the water in the fan coil at the end is not pumped out in time and accumulates, the low ambient temperature can easily cause the water in the fan coil to freeze and expand in volume, damaging the exhaust pipes. Once the exhaust pipes are damaged, repairs are troublesome and costly. Summary of the invention

[0005] The object of the present invention is to at least provide a fan coil heating protection method, device, equipment and storage medium, which can at least solve the technical problem that in a low temperature area, when a central air-conditioning unit is shut down and not used for a period of time, if the water in the fan tube coil at the end is not pumped out in time and accumulates, the ambient temperature is too low, which can easily cause the water in the fan coil to freeze and expand in volume, damaging its exhaust pipes, and the repair of the damaged exhaust pipes is troublesome and costly. At least the first temperature drop time can be obtained by combining the first tube body temperature of the fan coil with the ambient temperature of the target environment, so as to perform advance heating protection on the fan coil, effectively reducing the probability of the situation that the ambient temperature is too low, which can easily cause the water in the fan coil to freeze and expand in volume, damaging its exhaust pipes, thereby saving repair costs.

[0006] In order to solve the above technical problems, at least one embodiment of the present application provides a fan coil heating protection method, wherein the air conditioning system to which the fan coil belongs works in a target environment, and the method comprises:

[0007] When the fan coil unit is in a shutdown state, periodically obtaining the ambient temperature of the target environment;

[0008] When the ambient temperature shows a downward trend, determining a temperature drop rate of the target environment;

[0009] Acquire a first tube body temperature of the fan coil unit, and predict a first temperature drop time based on the first tube body temperature and the temperature drop rate, wherein the first temperature drop time is the time required for the fan coil unit to drop from the first tube body temperature to a preset temperature;

[0010] Determine whether the first temperature drop time is less than a preset first time threshold;

[0011] When it is determined that the first temperature drop time is less than the first time threshold, a heating element outside the fan coil unit is started to heat the fan coil unit.

[0012] At least one embodiment of the present application further provides a fan coil unit heating protection device, comprising: a thermostat, a temperature sensor, a heating element disposed outside the fan coil unit, and a control unit;

[0013] The control unit is used to periodically obtain the ambient temperature of the target environment through the thermostat when the fan coil unit is in a shutdown state, and determine the temperature drop rate of the target environment when the ambient temperature shows a downward trend; obtain the first tube body temperature of the fan coil unit through the temperature sensor, and predict the first temperature drop time based on the first tube body temperature and the temperature drop rate; determine whether the first temperature drop time is less than a preset first time threshold; when it is determined that the first temperature drop time is less than the first time threshold, start the heating element outside the fan coil unit to heat the fan coil unit.

[0014] At least one embodiment of the present application further provides a fan coil unit heating protection device, comprising:

[0015] An acquisition module, used for periodically acquiring the ambient temperature of the target environment when the fan coil unit is in a shutdown state;

[0016] A rate determination module, used to determine the temperature drop rate of the target environment when the ambient temperature shows a temperature drop trend;

[0017] a time prediction module, used to obtain a first tube body temperature of the fan coil unit, and predict a first temperature drop time based on the first tube body temperature and the temperature drop rate, wherein the first temperature drop time is the time required for the fan coil unit to drop from the first tube body temperature to a preset temperature;

[0018] A judging module, used to judge whether the first temperature drop time is less than a preset first time threshold;

[0019] The heating control module is used to start the heating element outside the fan coil unit to heat the fan coil unit when it is determined that the first temperature drop time is less than the first time threshold.

[0020] At least one embodiment of the present application also provides an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned fan coil heating protection method.

[0021] At least one embodiment of the present application further provides a computer-readable storage medium storing a computer program, wherein the computer program implements the above-mentioned fan coil heating protection method when executed by a processor.

[0022] The fan coil heating protection method provided in the embodiment of the present application periodically obtains the ambient temperature of the target environment when the fan coil is in a shutdown state, and determines the temperature drop rate of the target environment when the ambient temperature shows a temperature drop trend. The first tube body temperature of the fan coil is obtained, and the first temperature drop time is predicted based on the first tube body temperature and the temperature drop rate, and it is determined whether the first temperature drop time is less than the preset first time threshold. When it is determined that the first temperature drop time is less than the first time threshold, the heating element outside the fan coil is started to heat the fan coil. In this way, the first temperature drop time is obtained by combining the first tube body temperature of the fan coil with the ambient temperature of the target environment, and the fan coil is heated in advance, which effectively reduces the probability of the occurrence of the situation where the water in the fan coil freezes and expands in volume to damage its exhaust pipe due to the low ambient temperature, thereby saving maintenance costs.

[0023] In some optional embodiments, after starting the heating element outside the fan coil unit to heat the fan coil unit, the method further includes:

[0024] Periodically acquiring a second tube body temperature of the fan coil unit, and predicting a second temperature drop time based on the second tube body temperature and the temperature drop rate, wherein the second temperature drop time is the time required for the fan coil unit to drop from the second tube body temperature to the preset temperature;

[0025] Determine whether the second temperature drop time is greater than a preset second time threshold, and the second time threshold is greater than the first time threshold;

[0026] When it is determined that the second temperature drop time is greater than the second time threshold, the heating element outside the fan coil unit that heats the fan coil unit is turned off.

[0027] When the second temperature drop time is greater than the second time threshold, the heating element outside the fan coil unit is turned off to heat the fan coil unit, thereby effectively reducing the energy consumption required for the heating element to heat the fan coil unit, thereby saving energy and protecting the environment.

[0028] In some optional embodiments, when it is determined that the first temperature drop time is less than the first time threshold, starting a heating element outside the fan coil unit to heat the fan coil unit includes:

[0029] When it is determined that the first temperature drop time is less than the first time threshold, the heating priority of the fan coil unit is determined based on the first tube body temperature obtained in the current cycle; wherein, the higher the heating priority, the higher the temperature value of the preset temperature interval to which the corresponding first tube body temperature belongs;

[0030] Based on the heating priority of the fan coil unit, a heating element outside the fan coil unit is started to heat the fan coil unit.

[0031] Based on the heating priority of the fan coil units, the heating elements outside the fan coil units are started to heat the fan coil units to avoid the situation where the start times of many heating elements outside the fan coil units are extremely close, thereby causing impact on the power grid.

[0032] In some optional embodiments, the method further includes:

[0033] Obtain the floor height where the fan coil unit is located;

[0034] The first tube body temperature obtained based on the current cycle includes:

[0035] A heating priority of the fan coil unit is determined based on the floor height and the first pipe temperature.

[0036] The heating priority of the fan coil unit is determined according to the floor height and the temperature of the first pipe body, so as to accurately configure the heating priority of the fan coil unit, thereby providing advance heating protection for the fan coil unit and reducing the situation in which the fan coil unit freezes due to the ambient temperature being too low and the heating rate of the fan coil unit being lower than the temperature drop rate when the fan coil unit is heated up.

[0037] In some optional embodiments, the number of the fan coil units is multiple;

[0038] The step of starting a heating element outside the fan coil unit to heat the fan coil unit based on the heating priority of the fan coil unit includes:

[0039] Based on the heating priority of each fan coil unit, the heating element outside the fan coil unit is started to heat the fan coil unit after the preset delay time corresponding to each fan coil unit; the higher the heating priority of the fan coil unit, the longer the preset delay time corresponding to starting the heating element outside the fan coil unit.

[0040] By setting a preset delay time corresponding to each fan coil unit, the heating element is started to heat the fan coil unit after the preset delay time, thereby reducing the situation where the start time of heating elements outside the fan coil units is extremely close, thereby reducing the impact on the power grid caused by.

[0041] In some optional embodiments, starting the heating element outside the fan coil unit to heat the fan coil unit after the preset delay time corresponding to each fan coil unit includes:

[0042] Determining the start interval time of each of the two adjacently turned-on heating elements according to the preset delay time length corresponding to each of the fan coil units;

[0043] Based on the start-up interval time, the heating elements outside the fan coil unit are sequentially started to heat the fan coil unit.

[0044] After the heating element outside the fan coil unit corresponding to the previous heating priority is started, the heating element outside the fan coil unit corresponding to the next heating priority is started after an opening interval time to avoid the situation where the opening times of two adjacent heating priorities are extremely close, thereby causing an impact on the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] One or more embodiments are exemplarily described by the pictures in the corresponding drawings, and these exemplary descriptions do not constitute limitations on the embodiments.

[0046] Figure 1 It is a flow chart of a fan coil heating protection method provided by an embodiment of the present application;

[0047] Figure 2 It is a schematic diagram of a flow chart of a fan coil heating protection device provided by an embodiment of the present application;

[0048] Figure 3 is a structural schematic diagram of an electronic device provided by another embodiment of the present application;

[0049] Figure 4 is a flow chart of a fan coil unit heating protection method provided by another embodiment of the present application;

[0050] Figure 5 It is a structural schematic diagram of a fan coil heating protection device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0051] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0052] In order to facilitate understanding of the embodiments of the present application, relevant contents about the fan coil unit heating protection method are first introduced here.

[0053] Central air conditioning is a general term for centralized and semi-centralized air conditioning. Its system consists of one or more cold and heat source systems and multiple air conditioning systems. Central air conditioning is now widely used in various places such as office buildings and shopping malls, and its application area is becoming more and more extensive.

[0054] In some technologies, the fan coil unit is one of the terminal devices of the air conditioning system, which is composed of a small fan, a motor and a coil (air heat exchanger). When chilled water or hot water flows through the coil tube, it exchanges heat with the air outside the tube, so that the air is cooled, dehumidified or heated, thereby adjusting the indoor air parameters. The working principle of the fan coil unit is to drive the air through the coil (air heat exchanger) through a small fan and a motor, and exchange heat with the chilled water or hot water flowing in the exhaust pipe.

[0055] However, in areas with lower temperatures, when the central air-conditioning unit is shut down and not in use for a period of time, if the water in the fan coil at the end is not pumped out in time and accumulates, the low ambient temperature can easily cause the water in the fan coil to freeze and expand in volume, damaging the exhaust pipes. Once the exhaust pipes are damaged, repairs are troublesome and costly.

[0056] In order to solve the technical problem that when the above-mentioned central air-conditioning unit is shut down and not used for a period of time, the ambient temperature is too low, which may cause the water in the fan coil to freeze and expand in volume, thereby damaging the exhaust pipe, and the exhaust pipe is troublesome to repair and has high cost, the present invention proposes a fan coil heating protection method. The implementation details of the fan coil heating protection method of this embodiment are specifically described below. The following content is only the implementation details provided for easy understanding and is not necessary for the implementation of this solution.

[0057] Embodiment 1:

[0058] The fan coil heating protection method of this embodiment can be applied to electronic devices with communication, computing and data storage capabilities. The air conditioning system to which the fan coil belongs works in the target environment. The specific process can be as follows: Figure 1As shown, including:

[0059] Step 101, when the fan coil unit is in a shutdown state, periodically obtain the ambient temperature of the target environment.

[0060] Specifically, one air-conditioning unit can be connected to N (N is greater than 1) fan coil units. For example, the central air-conditioning (air-conditioning system) of a building is controlled by one air-conditioning unit, and fan coil units are installed on each floor and in each room of the building. In this embodiment, the fan coil unit works in a target environment, wherein the target environment can be an indoor environment or an outdoor environment, and the target environment depends on the location of the fan coil unit. When the fan coil unit is in a shutdown state, that is, when the air-conditioning unit is shut down and not in use, the ambient temperature of the target environment is periodically obtained. When obtaining the ambient temperature of the target environment, a temperature sensor can be set in the thermostat to obtain the ambient temperature of the target environment in real time or at intervals of unit time. Preferably, the target environment refers to the indoor environment in which the air-conditioning system to which the fan coil unit belongs works.

[0061] Step 102, when the ambient temperature shows a downward trend, determine the temperature drop rate of the target environment.

[0062] Specifically, since the water in the fan coil unit may expand and damage its pipes due to the low ambient temperature, in order to reduce the occurrence of the above situation, in this embodiment, when the ambient temperature is decreasing, the temperature drop rate of the target environment is determined. The temperature drop rate of the target environment is calculated by the following relationship:

[0063]

[0064] Where v is the temperature drop rate, Δt is the change in ambient temperature, and ΔT is the unit interval time.

[0065] In some examples, the unit interval is set to 0.25h. After obtaining the ambient temperature of the target environment, the difference between the ambient temperatures of the two unit intervals before and after is calculated to obtain the change in ambient temperature. The temperature drop rate of the target environment is calculated.

[0066] Step 103, obtaining a first tube body temperature of the fan coil unit, and predicting a first temperature drop time based on the first tube body temperature and the temperature drop rate, the first temperature drop time being the time required for the fan coil unit to drop from the first tube body temperature to a preset temperature.

[0067] Specifically, the first tube temperature of the fan coil unit is obtained through the temperature sensor, and the first temperature drop time is predicted based on the first tube temperature and the temperature drop rate, that is, the time required for the fan coil unit to drop from the first tube temperature to the preset temperature in the current target environment is calculated. The first temperature drop time is calculated using the following relationship:

[0068]

[0069] Wherein, T is the first temperature drop time, t' is the first tube temperature, t0 is the preset temperature, and v is the temperature drop rate.

[0070] In some examples, the preset temperature is set to 0°C. When the temperature of the first tube drops to 0°C, the water in the fan coil unit may freeze. Therefore, substituting t0=0 into equation (2), The first temperature drop time is calculated to predict the first temperature drop time required for the first tube body temperature to drop to 0°C.

[0071] Step 104: determine whether the first temperature drop time is less than a preset first time threshold.

[0072] Specifically, when the first temperature drop time is too short, if the heating rate of the fan coil unit is much lower than the temperature drop rate of the target environment, the temperature of the fan coil unit is still on a downward trend, which may easily cause the water in the fan coil unit to freeze. Therefore, it is necessary to judge the first temperature drop time to determine whether it is less than the preset first time threshold. In some examples, the first time threshold is set to 2 hours, and it is determined whether the first temperature drop time is less than 2 hours.

[0073] Step 105: when it is determined that the first temperature drop time is less than the first time threshold, a heating element outside the fan coil unit is started to heat the fan coil unit.

[0074] Specifically, when the first temperature drop time is less than the first time threshold, the fan coil unit needs to be heated for protection to reduce the situation where the ambient temperature is too low and the heating rate of the fan coil unit is less than the temperature drop rate when the fan coil unit is heated, resulting in freezing of the fan coil unit. In this embodiment, a heating element (such as an electric heating belt) is provided outside the fan coil unit, and the fan coil unit is heated by starting the heating element outside the fan coil unit.

[0075] In some embodiments, when the first temperature drop time is greater than or equal to the first time threshold, the fan coil unit is not heated for protection, and the temperature of the fan coil unit is monitored in real time until the first temperature drop time is less than the first time threshold.

[0076] In this embodiment, when the fan coil unit is in a shutdown state, the ambient temperature of the target environment is periodically obtained, and when the ambient temperature shows a downward trend, the temperature drop rate of the target environment is determined. The first tube body temperature of the fan coil unit is obtained, and the first temperature drop time is predicted based on the first tube body temperature and the temperature drop rate, and it is determined whether the first temperature drop time is less than the preset first time threshold. When it is determined that the first temperature drop time is less than the first time threshold, the heating element outside the fan coil unit is started to heat the fan coil unit. In this way, the first temperature drop time is obtained by combining the first tube body temperature of the fan coil unit with the ambient temperature of the target environment, and the fan coil unit is heated and protected in advance, which effectively reduces the probability of the occurrence of the situation where the water in the fan coil unit freezes and expands in volume due to the low ambient temperature, thereby saving maintenance costs.

[0077] In some embodiments, after starting the heating element outside the fan coil unit to heat the fan coil unit, the method further includes:

[0078] Periodically obtaining a second tube body temperature of the fan coil unit, and predicting a second temperature drop time based on the second tube body temperature and the temperature drop rate, wherein the second temperature drop time is the time required for the fan coil unit to drop from the second tube body temperature to a preset temperature;

[0079] Determine whether the second temperature drop time is greater than a preset second time threshold, and the second time threshold is greater than the first time threshold;

[0080] When it is determined that the second temperature drop time is greater than the second time threshold, the heating of the fan coil by the heating element outside the fan coil is turned off.

[0081] Specifically, after the fan coil unit is heated for protection, the second tube body temperature of the fan coil unit is obtained in real time or at intervals of unit time through the temperature sensor, and the second temperature drop time is predicted based on the second tube body temperature and the temperature drop rate of the target environment. The second temperature drop time is calculated through the relationship (2), that is, the time required for the fan coil unit to drop from the second tube body temperature to the preset temperature in the current target environment is calculated.

[0082] In this embodiment, since the second tube body temperature of the fan coil unit is greater than the first tube body temperature after the fan coil unit is heated for protection, the second temperature drop time is also greater than the first temperature drop time. Therefore, when judging the temperature drop time, the second time threshold to be compared is greater than the first time threshold. When the second temperature drop time is greater than the second time threshold, the second temperature drop time is longer, that is, it takes a longer time for the second tube body temperature to drop to the preset temperature, causing the volume expansion of the water in the fan coil unit after freezing to damage its exhaust pipe. Therefore, when the second temperature drop time is greater than the second time threshold, it means that the second temperature drop time is longer, and the heating element outside the fan coil unit is turned off to heat the fan coil unit. Thereafter, the temperature of the fan coil unit is monitored in real time until the second temperature drop time is less than the first time threshold. In this way, the energy consumption required for the heating element to heat the fan coil unit is reduced, which is energy-saving and environmentally friendly.

[0083] In some examples, the second time threshold is set to 5 hours, and it is determined whether the second temperature drop time is greater than 5 hours.

[0084] In some embodiments, when the second temperature drop time is less than or equal to the second time threshold, the heating element is not controlled, and the heating element is kept heating the fan coil unit.

[0085] In some embodiments, when it is determined that the first temperature drop time is less than the first time threshold, starting a heating element outside the fan coil unit to heat the fan coil unit includes:

[0086] When it is determined that the first temperature drop time is less than the first time threshold, the heating priority of the fan coil unit is determined based on the first tube body temperature obtained in the current cycle; wherein, the higher the heating priority, the higher the temperature value of the preset temperature interval to which the corresponding first tube body temperature belongs;

[0087] Based on the heating priority of the fan coil units, the heating elements outside the fan coil units are started to heat the fan coil units.

[0088] Specifically, the first tube temperature of the fan coil unit is periodically obtained, and when it is determined that the first temperature drop time is less than the first time threshold, the heating priority of the fan coil unit is determined based on the first tube temperature obtained in the current period. Specifically, the heating priority of the fan coil unit is determined according to the preset temperature interval to which the first tube temperature belongs, wherein the higher the heating priority, the higher the temperature value of the preset temperature interval to which the corresponding first tube temperature belongs. In some examples, as shown in Table 1 below, the first heating priority corresponds to the first preset temperature interval, which is less than or equal to 2°C, the second heating priority corresponds to the second preset temperature interval, which is greater than 2°C and less than or equal to 4°C, the third heating priority corresponds to the third preset temperature interval, which is greater than 4°C and less than or equal to 6°C, the fourth heating priority corresponds to the fourth preset temperature interval, which is greater than 6°C and less than or equal to 8°C, and the fifth heating priority corresponds to the fifth preset temperature interval, which is greater than 8°C.

[0089] Table 1 Correspondence between priority and preset temperature range

[0090] Priority Preset temperature range First heating priority Fan coil temperature <=2℃ Second heating priority 2℃<Fan coil temperature<=4℃ Third heating priority 4℃<Fan coil temperature<=6℃ Fourth heating priority 6℃<Fan coil temperature<=8℃ Fifth heating priority Fan coil temperature>8℃

[0091] In this embodiment, the heating element outside the fan coil unit is started to heat the fan coil unit according to the heating priority of the fan coil unit. In some examples, between the fan coil unit with the first heating priority and the fan coil unit with the second heating priority, the fan coil unit with the first heating priority is heated first. In some examples, when the priority of the fan coil unit is the second heating priority, the heating response time of the fan coil unit is longer than that of the fan coil unit with the first heating priority, that is, for the fan coil unit with the second heating priority, the fan coil unit needs to be heated and protected after a certain interval, and the interval time is longer than the interval time of the fan coil unit with the first heating priority. Based on the heating priority of the fan coil unit, the heating element outside the fan coil unit is started to heat the fan coil unit to avoid the situation where the opening time of the heating elements outside the fan coil units is extremely close, thereby causing an impact on the power grid.

[0092] In some embodiments, the method further comprises:

[0093] Get the floor height where the fan coil unit is located;

[0094] The first tube body temperature obtained based on the current cycle includes:

[0095] The heating priority of the fan coil unit is determined based on the floor height and the first pipe temperature.

[0096] Specifically, when the air conditioning unit is shut down and not in use, as the weather changes and the ambient temperature decreases, the temperature of the fan coil unit decreases accordingly. The temperature of each fan coil unit decreases at different speeds. For example, the indoor temperature of a high floor decreases faster than that of a low floor. Therefore, the heating protection should be turned on for the fan coil units on the high floor first. In this embodiment, the floor height where the fan coil unit is located is obtained, and the heating priority of the fan coil unit is determined according to the floor height and the first tube body temperature.

[0097] In some embodiments, the number of fan coil units is multiple;

[0098] Based on the heating priority of the fan coil unit, the heating elements outside the fan coil unit are started to heat the fan coil unit, including:

[0099] Based on the heating priority of each fan coil unit, the heating element outside the fan coil unit is started to heat the fan coil unit after the preset delay time corresponding to each fan coil unit; the higher the heating priority of the fan coil unit, the longer the preset delay time corresponding to starting the heating element outside the fan coil unit.

[0100] Specifically, one air conditioning unit can be connected to N (N is greater than 1) fan coil units. For example, the central air conditioning (air conditioning system) of a building is controlled by one air conditioning unit, and each floor and each room of the building is equipped with a fan coil unit. In this embodiment, there are multiple fan coil units, and the heating priority of each fan coil unit corresponds to a preset delay time, wherein the preset delay time of each fan coil unit may be the same or different. For multiple fan coil units with the same heating priority, the preset delay time of the heating elements outside them is the same, but for multiple fan coil units with different heating priorities, the preset delay time corresponding to the heating element outside the fan coil unit with a higher heating priority is longer. In some examples, the fan coil units of different adjacent heating priorities may be separated by the same time length, or by different time lengths. For example, the difference between the preset delay time of the fan coil unit with the third heating priority and the preset delay time of the fan coil unit with the fourth heating priority, and the difference between the preset delay time of the fan coil unit with the second heating priority and the preset delay time of the fan coil unit with the third heating priority may be the same or different.

[0101] In this embodiment, after the preset delay time corresponding to each fan coil unit, the heating element outside the fan coil unit is started to heat the fan coil unit. In some examples, there are multiple fan coil units, for example, a fan coil unit of the first priority and a fan coil unit of the second priority, and the preset delay time of the fan coil unit of the second priority is greater than the preset delay time of the fan coil unit of the first priority. When the heating element outside the fan coil unit of the first priority is started, the heating element outside the fan coil unit of the second priority is started after a certain time.

[0102] In some embodiments, after a preset delay time corresponding to each fan coil unit, a heating element outside the fan coil unit is started to heat the fan coil unit, including:

[0103] According to the preset delay time corresponding to each fan coil unit, the opening interval time of each two adjacently opened heating elements is determined;

[0104] Based on the start-up interval time, the heating elements outside the fan coil unit are sequentially started to heat the fan coil unit.

[0105] Specifically, the two adjacently turned-on heating elements refer to the heating elements outside the fan coil units corresponding to two adjacent heating priorities, such as the heating elements outside the fan coil units of the third priority and the heating elements outside the fan coil units of the fourth priority. Each fan coil unit's heating priority corresponds to a preset delay time. According to the preset delay time corresponding to the fan coil units corresponding to the two adjacent heating priorities, the turn-on interval time of the heating elements outside the fan coil units corresponding to the two adjacent heating priorities is determined, that is, after the heating element outside the fan coil unit corresponding to the previous heating priority is started, the heating element outside the fan coil unit corresponding to the next heating priority is started after an interval of the start-up interval, so as to avoid the situation where the start-up time of two adjacent heating priorities is extremely close, thereby causing an impact on the power grid.

[0106] In some examples, there is a fan coil unit with a first priority and a fan coil unit with a second priority. After a heating element outside the fan coil unit with the first priority is started to heat the fan coil unit with the first priority, the heating element outside the fan coil unit with the second priority is started after an on interval to heat the fan coil unit with the second priority.

[0107] Embodiment 2:

[0108] like Figure 5 As shown, the fan coil heating protection device of this embodiment includes: a thermostat, a fan plate, a temperature sensor, a heating element arranged outside the fan coil, and a control unit;

[0109] The control unit is used to periodically obtain the ambient temperature of the target environment through the thermostat when the fan coil unit is in a shutdown state, and determine the temperature drop rate of the target environment when the ambient temperature shows a downward trend; obtain the first tube body temperature of the fan coil unit through the temperature sensor, and predict the first temperature drop time based on the first tube body temperature and the temperature drop rate; determine whether the first temperature drop time is less than a preset first time threshold; when it is determined that the first temperature drop time is less than the first time threshold, start the heating element outside the fan coil unit to heat the fan coil unit.

[0110] In this embodiment, the thermostat is connected to the cloud, and a temperature sensor is provided inside the thermostat. The cloud can receive the ambient temperature and the temperature of the fan coil transmitted by the thermostat in real time, and display them to the user for the user to make a decision. The thermostat monitors, stores, and displays the ambient temperature, calculates the temperature drop rate, receives and stores the temperature of the fan coil monitored by the fan board, and sends a protection start or shutdown command to the fan board from the host computer. The number of fan boards corresponds to the number of fan coils. The temperature sensor is provided on the fan board. The fan board is equipped with a temperature sensor, which can monitor the temperature of the fan coil in real time and feedback to the host computer for the thermostat to calculate and make decisions. It can receive the heating protection command of the host computer and control the electric heating operation of the fan coil. The heating element is provided outside the fan coil. The heating element is an electric heating belt. The electric heating belt is arranged between the fan coils, and generates heat and transmits it to the fan coil after power is turned on.

[0111] In this embodiment, when the fan coil unit is in a shutdown state, the ambient temperature of the target environment is periodically obtained, and when the ambient temperature shows a downward trend, the temperature drop rate of the target environment is determined. The first tube body temperature of the fan coil unit is obtained, and the first temperature drop time is predicted based on the first tube body temperature and the temperature drop rate, and it is determined whether the first temperature drop time is less than the preset first time threshold. When it is determined that the first temperature drop time is less than the first time threshold, the heating element outside the fan coil unit is started to heat the fan coil unit. In this way, the first temperature drop time is obtained by combining the first tube body temperature of the fan coil unit with the ambient temperature of the target environment, and the fan coil unit is heated and protected in advance, which effectively reduces the probability of the occurrence of the situation where the water in the fan coil unit freezes and expands in volume due to the low ambient temperature, thereby saving maintenance costs.

[0112] Embodiment three:

[0113] like Figure 4 and Figure 5 As shown, this embodiment provides exemplary contents of Embodiment 1 and Embodiment 2, that is, provides an exemplary process of a fan coil heating protection method and device, and the specific contents include:

[0114] The cloud can receive the indoor ambient temperature and extension coil temperature information transmitted by the thermostat in real time and display it to the user for decision-making. The cloud can set the fan coil temperature protection startup priority. The default startup priority is divided into 5 levels, as follows:

[0115] Priority Preset temperature range First heating priority Fan coil temperature <=2℃ Second heating priority 2℃<Fan coil temperature<=4℃ Third heating priority 4℃<Fan coil temperature<=6℃ Fourth heating priority 6℃<Fan coil temperature<=8℃ Fifth heating priority Fan coil temperature>8℃

[0116] Among them, the priority setting includes the setting of the number of priorities and the setting of the temperature control range of each level.

[0117] The thermostat can monitor, store, and display the indoor ambient temperature, calculate the temperature drop rate, and can also receive and store the fan coil temperature information monitored by the fan board, and send protection start or shutdown commands to the fan board from the host computer.

[0118] like Figure 5 As shown, the temperature sensor 0 detects the indoor ambient temperature t in real time, and calculates the instantaneous temperature drop rate v through the temperature change Δt every 0.25h.

[0119] Temperature sensors 1, 2...n monitor the instantaneous temperature t' of fan coil units 1, 2...n (generalization of the temperatures t1', t2', t3'... of each fan coil unit), and use the temperature drop rate v calculated by equation (1) to predict the time T required for t' to drop to 0°C. When T<2h, the thermostat sends a protection start command to start heating protection; when T>5h, the thermostat sends a protection shutoff command to shut off heating protection.

[0120] The fan board is equipped with a temperature sensor, which can monitor the fan coil temperature in real time and feed back to the host computer for the thermostat to calculate and make decisions. It can also receive heating protection commands from the host computer to control the electric heating operation of the fan coil.

[0121] The electric heating belt is arranged between the fan coil units, and generates heat and transfers it to the fan coil units when powered on.

[0122] In this embodiment, before the temperature of the fan coil unit drops to a level that causes freezing, the fan coil unit is heated by a heating element outside the fan coil unit. Heating protection is gradually turned on according to the priority of the fan coil units to prevent simultaneous activation and grid shock. The first temperature drop time is obtained by combining the temperature of the fan coil unit with the ambient temperature of the target environment, and the fan coil unit is heated in advance and in batches with time sequence to prevent damage to the fan coil unit at the terminal of the central air conditioner, while avoiding excessive power load from impacting the grid and extending the service life of the equipment.

[0123] Embodiment 4:

[0124] Another embodiment of the present application relates to a fan coil heating protection device. The implementation details of the fan coil heating protection device of this embodiment are specifically described below. The following content is only for the convenience of understanding the implementation details, and is not necessary for the implementation of this solution. The schematic diagram of the fan coil heating protection device of this embodiment can be as follows Figure 2 As shown, including:

[0125] The acquisition module 201 is used to periodically acquire the ambient temperature of the target environment when the fan coil unit is in a shutdown state;

[0126] The rate determination module 202 is used to determine the temperature drop rate of the target environment when the ambient temperature shows a temperature drop trend;

[0127] The time prediction module 203 is used to obtain the first tube body temperature of the fan coil unit, and predict the first temperature drop time based on the first tube body temperature and the temperature drop rate, where the first temperature drop time is the time required for the fan coil unit to drop from the first tube body temperature to a preset temperature;

[0128] A judgment module 204 is used to judge whether the first temperature drop time is less than a preset first time threshold;

[0129] The heating control module 205 is used to start the heating element outside the fan coil unit to heat the fan coil unit when it is determined that the first temperature drop time is less than the first time threshold.

[0130] It is worth mentioning that all modules involved in this embodiment are logic modules. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of this application, this embodiment does not introduce units that are not closely related to solving the technical problems proposed by this application, but this does not mean that there are no other units in this embodiment.

[0131] Embodiment five:

[0132] Another embodiment of the present application relates to an electronic device, such as Figure 3 As shown, it includes: at least one processor 901; and a memory 902 that is communicatively connected to the at least one processor 901; wherein the memory 902 stores instructions that can be executed by the at least one processor 901, and the instructions are executed by the at least one processor 901 so that the at least one processor 901 can execute the fan coil heating protection method in the above-mentioned embodiments.

[0133] Among them, the memory and the processor are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor.

[0134] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory can be used to store data used by the processor when performing operations.

[0135] Embodiment six:

[0136] Another embodiment of the present application relates to a computer-readable storage medium storing a computer program, which implements the above method embodiment when executed by a processor.

[0137] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as: ROM), random access memory (Random Access Memory, referred to as: RAM), disk or optical disk and other media that can store program codes.

[0138] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A fan coil heating protection method, characterized in that: The air conditioning system to which the fan coil unit belongs operates in a target environment, and the method comprises: When the fan coil unit is in a shutdown state, periodically obtaining the ambient temperature of the target environment; When the ambient temperature shows a downward trend, determining a temperature drop rate of the target environment; Acquire a first tube body temperature of the fan coil unit, and predict a first temperature drop time based on the first tube body temperature and the temperature drop rate, wherein the first temperature drop time is the time required for the fan coil unit to drop from the first tube body temperature to a preset temperature; Determine whether the first temperature drop time is less than a preset first time threshold; When it is determined that the first temperature drop time is less than the first time threshold, a heating element outside the fan coil unit is started to heat the fan coil unit.

2. The fan coil unit heating protection method according to claim 1, characterized in that: After starting the heating element outside the fan coil unit to heat the fan coil unit, the method further includes: Periodically acquiring a second tube body temperature of the fan coil unit, and predicting a second temperature drop time based on the second tube body temperature and the temperature drop rate, wherein the second temperature drop time is the time required for the fan coil unit to drop from the second tube body temperature to the preset temperature; Determine whether the second temperature drop time is greater than a preset second time threshold, and the second time threshold is greater than the first time threshold; When it is determined that the second temperature drop time is greater than the second time threshold, the heating element outside the fan coil unit that heats the fan coil unit is turned off.

3. The fan coil unit heating protection method according to claim 1, characterized in that: When it is determined that the first temperature drop time is less than the first time threshold, starting the heating element outside the fan coil unit to heat the fan coil unit includes: When it is determined that the first temperature drop time is less than the first time threshold, the heating priority of the fan coil unit is determined based on the first tube body temperature obtained in the current cycle; wherein, the higher the heating priority, the higher the temperature value of the preset temperature interval to which the corresponding first tube body temperature belongs; Based on the heating priority of the fan coil unit, a heating element outside the fan coil unit is started to heat the fan coil unit.

4. The fan coil unit heating protection method according to claim 3, characterized in that: The method further comprises: Obtaining the floor height at which the fan coil unit is located; The first tube body temperature obtained based on the current cycle includes: A heating priority of the fan coil unit is determined based on the floor height and the first pipe temperature.

5. The fan coil unit heating protection method according to claim 1, characterized in that: The number of the fan coil units is multiple; The step of starting a heating element outside the fan coil unit to heat the fan coil unit based on the heating priority of the fan coil unit includes: Based on the heating priority of each fan coil unit, the heating element outside the fan coil unit is started to heat the fan coil unit after the preset delay time corresponding to each fan coil unit; the higher the heating priority of the fan coil unit, the longer the preset delay time corresponding to starting the heating element outside the fan coil unit.

6. The fan coil unit heating protection method according to claim 5, characterized in that: The method of starting the heating element outside the fan coil unit to heat the fan coil unit after the preset delay time corresponding to each fan coil unit comprises: Determining the start interval time of each of the two adjacently turned-on heating elements according to the preset delay time length corresponding to each of the fan coil units; Based on the start-up interval time, the heating elements outside the fan coil unit are sequentially started to heat the fan coil unit.

7. A fan coil heating protection device, characterized in that: include: A thermostat, a temperature sensor, a heating element disposed outside the fan coil unit, and a control unit; The control unit is used to periodically obtain the ambient temperature of the target environment through the thermostat when the fan coil unit is in a shutdown state, and determine the temperature drop rate of the target environment when the ambient temperature shows a downward trend; obtain the first tube body temperature of the fan coil unit through the temperature sensor, and predict the first temperature drop time based on the first tube body temperature and the temperature drop rate; determine whether the first temperature drop time is less than a preset first time threshold; when it is determined that the first temperature drop time is less than the first time threshold, start the heating element outside the fan coil unit to heat the fan coil unit.

8. A fan coil heating protection device, characterized in that: include: An acquisition module, used for periodically acquiring the ambient temperature of the target environment when the fan coil unit is in a shutdown state; A rate determination module, used to determine the temperature drop rate of the target environment when the ambient temperature shows a temperature drop trend; a time prediction module, used to obtain a first tube body temperature of the fan coil unit, and predict a first temperature drop time based on the first tube body temperature and the temperature drop rate, wherein the first temperature drop time is the time required for the fan coil unit to drop from the first tube body temperature to a preset temperature; A judging module, used to judge whether the first temperature drop time is less than a preset first time threshold; The heating control module is used to start the heating element outside the fan coil unit to heat the fan coil unit when it is determined that the first temperature drop time is less than the first time threshold.

9. An electronic device, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the fan coil heating protection method according to any one of claims 1 to 6.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the fan coil heating protection method according to any one of claims 1 to 6 is implemented.

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