Fan coil unit heating protection methods, devices, equipment and storage media

Abstract

This invention discloses a method, apparatus, device, and storage medium for heating protection of fan coil units. The method includes: periodically acquiring the ambient temperature of a target environment when the fan coil unit is in a stopped state; determining the temperature drop rate of the target environment when the ambient temperature shows a decreasing trend; acquiring a first tube temperature of the fan coil unit and predicting a first temperature drop time based on the first tube temperature and the temperature drop rate; determining whether the first temperature drop time is less than a preset first time threshold; and activating a heating element outside the fan coil unit to heat the fan coil unit when the first temperature drop time is determined to be less than the first time threshold. This fan coil unit heating protection method solves the problem that excessively low ambient temperatures can easily cause water in the fan coil unit to freeze and expand, damaging its pipes. It effectively reduces the probability of such damage occurring when excessively low ambient temperatures cause water in the fan coil unit to freeze and expand, thus saving maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a method, apparatus, equipment, and storage medium for protecting the heating of fan coil units. Background Technology

[0002] Central air conditioning is a general term for centralized and semi-centralized air conditioning systems. 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 increasingly wide.

[0003] In some technologies, a fan coil unit is one of the terminal devices in an air conditioning system, consisting of a small fan, an electric motor, and a coil (air heat exchanger). When chilled water or hot water flows through the coil, it exchanges heat with the air outside, cooling, dehumidifying, or heating the air, thereby regulating indoor air parameters. The working principle of a fan coil unit is that a small fan and electric motor drive air to flow through the coil (air heat exchanger), exchanging heat with the chilled water or hot water flowing inside the coil.

[0004] However, in areas with low temperatures, if the water in the fan coil units at the terminals is not drained in time and accumulates when the central air conditioning unit is not used for a period of time, the water in the fan coil units may freeze and expand due to the low ambient temperature, damaging the pipes. Repairing damaged pipes is troublesome and costly. Summary of the Invention

[0005] The purpose of this invention is to provide at least one method, device, equipment, and storage medium for heating and protecting fan coil units. This invention addresses the technical problem that in low-temperature areas, when a central air conditioning unit is shut down for a period of time, if water in the fan coil units at the end is not promptly removed and accumulates, the low ambient temperature can easily cause the water in the fan coil units to freeze and expand, damaging the pipes. Repairing damaged pipes is troublesome and costly. This invention can at least achieve the goal of obtaining the first temperature drop time by combining the first pipe temperature of the fan coil unit with the target ambient temperature, thus providing preemptive heating and protection for the fan coil unit. This effectively reduces the probability of water in the fan coil units freezing and expanding due to low ambient temperatures, thereby saving on maintenance costs.

[0006] To address the aforementioned technical problems, at least one embodiment of this application provides a method for protecting the heating of a fan coil unit, wherein the air conditioning system to which the fan coil unit belongs operates in a target environment, and the method includes:

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

[0008] When the ambient temperature shows a decreasing trend, the rate of temperature drop of the target environment is determined;

[0009] The first tube temperature of the fan coil unit is obtained, and the first temperature drop time is predicted based on the first tube temperature and the temperature drop rate. The first temperature drop time is the time required for the fan coil unit to drop from the first tube 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, the heating element outside the fan coil unit is activated to heat the fan coil unit.

[0012] At least one embodiment of this application also provides a fan coil heating protection device, including: 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 acquire the ambient temperature of the target environment through the temperature controller when the fan coil unit is in a stopped state, and determine the temperature drop rate of the target environment when the ambient temperature shows a decreasing trend; acquire the first tube temperature of the fan coil unit through the temperature sensor, and predict the first temperature drop time based on the first tube 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, activate the heating element outside the fan coil unit to heat the fan coil unit.

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

[0015] The acquisition module is used to periodically acquire the ambient temperature of the target environment when the fan coil unit is in a stopped state.

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

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

[0018] The judgment module is used to determine whether the first temperature drop time is less than a preset first time threshold.

[0019] The heating control module is used to activate 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 this application also provides an electronic device, including: 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, the instructions being executed by the at least one processor to enable the at least one processor to perform the above-described fan coil heating protection method.

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

[0022] The fan coil unit heating protection method provided in this application periodically acquires the ambient temperature of the target environment when the fan coil unit is in a stopped state. When the ambient temperature shows a decreasing trend, the rate of temperature drop in the target environment is determined. The first pipe body temperature of the fan coil unit is acquired, and a first temperature drop time is predicted based on the first pipe body temperature and the rate of temperature drop. It is then determined whether the first temperature drop time is less than a preset first time threshold. When the first temperature drop time is determined to be less than the first time threshold, the heating element outside the fan coil unit is activated to heat the fan coil unit. Thus, by combining the first pipe body temperature of the fan coil unit with the ambient temperature of the target environment to obtain the first temperature drop time, the fan coil unit is provided with proactive heating protection. This effectively reduces the probability of water in the fan coil unit freezing and expanding in volume due to excessively low ambient temperatures, thus damaging the pipes and saving maintenance costs.

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

[0024] The second tube temperature of the fan coil unit is periodically acquired, and the second temperature drop time is predicted based on the second tube 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 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 of the fan coil unit by the heating element outside 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, effectively reducing the energy consumption required for the heating element to heat the fan coil unit, thus saving energy and protecting the environment.

[0028] In some optional embodiments, the step of activating 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 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 temperature obtained in the current cycle; wherein, the higher the heating priority, the higher the temperature value of the preset temperature range to which the first tube temperature belongs.

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

[0031] Based on the heating priority of the fan coil unit, the heating elements outside the fan coil unit are activated to heat the fan coil unit, in order to avoid the situation where the activation time of many external heating elements of the fan coil unit is extremely close, which could cause an 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 temperature obtained based on the current cycle includes:

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

[0036] Based on the floor height and the temperature of the first pipe body, the heating priority of the fan coil unit is determined to accurately configure the heating priority of the fan coil unit, thereby providing advance heating protection for the fan coil unit and reducing the possibility of the fan coil unit freezing when the ambient temperature is too low and the heating rate of the fan coil unit is less than the temperature drop rate.

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

[0038] The step of activating external heating elements to heat the fan coil unit based on its heating priority includes:

[0039] Based on the heating priority of each fan coil unit, the heating element outside the fan coil unit is activated to heat the fan coil unit after a 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 the activation of the heating element outside the fan coil unit.

[0040] By setting a preset delay time for each fan coil unit, the heating element is activated to heat the fan coil unit after the preset delay time, reducing the impact on the power grid caused by the extremely close activation time of heating elements outside many fan coil units.

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

[0042] The opening interval time between two adjacent heating elements is determined based on the preset delay time corresponding to each fan coil unit.

[0043] Based on the aforementioned activation interval, the heating elements outside the fan coil unit are sequentially activated 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, in order to avoid the situation where the opening times of two adjacent heating priorities are too close, which could cause an impact on the power grid. Attached Figure Description

[0045] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, and these illustrative descriptions do not constitute a limitation on the embodiments.

[0046] Figure 1 This is a schematic flowchart of a fan coil heating protection method provided in one embodiment of this application;

[0047] Figure 2 This is a schematic diagram of a fan coil heating protection device provided in one embodiment of this application;

[0048] Figure 3 This is a schematic diagram of the structure of an electronic device provided in another embodiment of this application;

[0049] Figure 4 This is a schematic flowchart of a fan coil heating protection method provided in another embodiment of this application;

[0050] Figure 5 This is a schematic diagram of the structure of a fan coil heating protection device provided in one embodiment of this application. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this application to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0052] To facilitate understanding of the embodiments of this application, the relevant content regarding the fan coil heating protection method will be introduced first.

[0053] Central air conditioning is a general term for centralized and semi-centralized air conditioning systems. 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 increasingly wide.

[0054] In some technologies, a fan coil unit is one of the terminal devices in an air conditioning system, consisting of a small fan, an electric motor, and a coil (air heat exchanger). When chilled water or hot water flows through the coil, it exchanges heat with the air outside, cooling, dehumidifying, or heating the air, thereby regulating indoor air parameters. The working principle of a fan coil unit is that a small fan and electric motor drive air to flow through the coil (air heat exchanger), exchanging heat with the chilled water or hot water flowing inside the coil.

[0055] However, in areas with low temperatures, if the water in the fan coil units at the terminals is not drained in time and accumulates when the central air conditioning unit is not used for a period of time, the water in the fan coil units may freeze and expand due to the low ambient temperature, damaging the pipes. Repairing damaged pipes is troublesome and costly.

[0056] To address the technical problem that when a central air conditioning unit is shut down for a period of time, the water in the fan coil unit may freeze and expand due to low ambient temperature, damaging the pipes. Furthermore, repairing damaged pipes is troublesome and costly. Therefore, this invention proposes a fan coil unit heating protection method. The implementation details of this embodiment are described below. These details are provided for ease of understanding and are not essential for implementing this solution.

[0057] Example 1:

[0058] The fan coil unit 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 unit belongs operates in the target environment, and its specific process can be as follows: Figure 1As shown, it includes:

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

[0060] Specifically, one air conditioning unit can connect to N (N 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 fan coil units. In this embodiment, the fan coil units operate in a target environment, which can be an indoor environment or an outdoor environment, depending on the location of the fan coil units. When the fan coil units are in a stopped state, i.e., when the air conditioning unit is not in use, the ambient temperature of the target environment is periodically acquired. This acquisition can be achieved by setting a temperature sensor in the thermostat to obtain the ambient temperature of the target environment in real time or at intervals. Preferably, the target environment refers to the indoor environment where the air conditioning system to which the fan coil units belong operates.

[0061] Step 102: When the ambient temperature shows a decreasing trend, determine the rate of temperature drop of the target environment.

[0062] Specifically, since excessively low ambient temperatures can easily cause water in fan coil units to freeze and expand, damaging the pipes, this embodiment determines the temperature drop rate of the target environment when the ambient temperature is decreasing. The temperature drop rate of the target environment is calculated using the following formula:

[0063]

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

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

[0066] Step 103: Obtain the first tube temperature of the fan coil unit, and predict the first temperature drop time based on the first tube temperature and the temperature drop rate. The first temperature drop time is the time required for the fan coil unit to drop from the first tube temperature to a preset temperature.

[0067] Specifically, the temperature of the first tube of the fan coil unit is acquired using a temperature sensor, and the first temperature drop time is predicted based on the first tube temperature and the temperature drop rate. In other words, the time required for the fan coil unit to drop from the first tube temperature to a preset temperature in the current target environment is calculated. The first temperature drop time is calculated using the following formula:

[0068]

[0069] In the formula, 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 cases, the preset temperature is set to 0℃. When the temperature of the first tube drops to 0℃, the water in the fan coil unit is prone to freezing. Therefore, substituting t0=0 into equation (2), through... 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 the preset first time threshold.

[0072] Specifically, if the first temperature drop time is too short, and the rate of temperature increase of the fan coil unit is much smaller than the rate of temperature decrease of the target environment, the temperature of the fan coil unit will continue to decrease, easily leading to freezing of the water in the fan coil unit. Therefore, it is necessary to determine whether the first temperature drop time is less than a preset first time threshold. In some examples, the first time threshold is set to 2 hours, and the determination is made 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, the heating element outside the fan coil unit is activated 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 possibility of the fan coil unit freezing due to the ambient temperature being too low and the heating rate of the fan coil unit being less than the temperature drop rate. In this embodiment, a heating element (such as an electric heating strip) is installed outside the fan coil unit, and the fan coil unit is heated by activating 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 stopped state, the ambient temperature of the target environment is periodically acquired. When the ambient temperature shows a decreasing trend, the rate of temperature drop in the target environment is determined. The first pipe temperature of the fan coil unit is acquired, and the first temperature drop time is predicted based on the first pipe temperature and the rate of temperature drop, and it is determined 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, the heating element outside the fan coil unit is activated to heat the fan coil unit. In this way, by combining the first pipe temperature of the fan coil unit with the ambient temperature of the target environment, the first temperature drop time is obtained, and the fan coil unit is preemptively heated for protection. This effectively reduces the probability of water in the fan coil unit freezing and expanding due to volume expansion, which can easily damage the pipes, thus saving maintenance costs.

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

[0078] The second tube temperature of the fan coil unit is periodically acquired, and the second temperature drop time is predicted based on the second tube temperature and the temperature drop rate. The second temperature drop time is the time required for the fan coil unit to drop from the second tube temperature to a preset temperature.

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

[0080] When the second temperature drop time is determined to be greater than the second time threshold, the heating of the fan coil unit by the external heating element is turned off.

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

[0082] In this embodiment, after the fan coil unit undergoes heating protection, the temperature of the second pipe body is higher than that of the first pipe body, and the second temperature drop time is also longer than the first temperature drop time. Therefore, when judging the temperature drop time, the second time threshold used for comparison 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 relatively long, meaning that the temperature of the second pipe body needs a longer time to drop to the preset temperature. This can cause the water in the fan coil unit to freeze, expand in volume, and damage its pipes. Therefore, when the second temperature drop time is greater than the second time threshold, it indicates that the second temperature drop time is relatively long. The heating element outside the fan coil unit is then turned off to heat the fan coil unit. Subsequently, 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. This reduces the energy consumption required for the heating element to heat the fan coil unit, resulting in energy saving and environmental protection.

[0083] In some cases, the second time threshold is set to 5 hours to determine 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 continues to heat the fan coil unit.

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

[0086] When 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 cycle; where the higher the heating priority, the higher the temperature value of the preset temperature range to which the corresponding first tube temperature belongs.

[0087] Based on the heating priority of the fan coil unit, the heating element outside the fan coil unit is activated to heat the fan coil unit.

[0088] Specifically, the first tube temperature of the fan coil unit is periodically acquired. When the first temperature drop time is determined to be less than a first time threshold, the heating priority of the fan coil unit is determined based on the first tube temperature acquired in the current cycle. Specifically, the heating priority of the fan coil unit is determined according to the preset temperature range to which the first tube temperature belongs. A higher heating priority corresponds to a higher temperature value within the preset temperature range to which the first tube temperature belongs. In some examples, as shown in Table 1 below, the first heating priority corresponds to the first preset temperature range (≤2℃), the second heating priority corresponds to the second preset temperature range (≥2℃ and ≤4℃), the third heating priority corresponds to the third preset temperature range (≥4℃ and ≤6℃), the fourth heating priority corresponds to the fourth preset temperature range (≥6℃ and ≤8℃), and the fifth heating priority corresponds to the fifth preset temperature range (≥8℃).

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

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

[0091] In this embodiment, heating elements outside the fan coil unit are activated to heat the fan coil unit according to its heating priority. In some examples, fan coil units with a first heating priority are prioritized for heating over those with a second heating priority. In some examples, when a fan coil unit has a second heating priority, the heating response time for that fan coil unit is longer than that for a fan coil unit with a first heating priority. That is, for a fan coil unit with a second heating priority, a certain interval is required before heating protection is initiated, and this interval is longer than that for a fan coil unit with a first heating priority. Activating external heating elements based on the fan coil unit's heating priority avoids a situation where the activation times of multiple external heating elements are extremely close, potentially causing a shock to the power grid.

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

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

[0094] Based on the first tube temperature obtained in the current cycle, including:

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

[0096] Specifically, when the air conditioning unit is not in use, the temperature of the fan coil units decreases as the weather changes and the ambient temperature drops. The rate of temperature decrease varies among the fan coil units; for example, the indoor temperature on higher floors drops faster than on lower floors. Therefore, heating protection should be activated first for fan coil units on higher floors. In this embodiment, the floor height of the fan coil unit is obtained, and the heating priority of the fan coil unit is determined based on the floor height and the temperature of the first pipe body.

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

[0098] Based on the heating priority of the fan coil unit, the external heating elements are activated 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 activated to heat the fan coil unit after a 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 the activation of the heating element outside the fan coil unit.

[0100] Specifically, one air conditioning unit can connect to N (N 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 fan coil units. In this embodiment, there are multiple fan coil units. The heating priority of each fan coil unit corresponds to a preset delay time. The preset delay time of each fan coil unit may be the same or different. Multiple fan coil units with the same heating priority have the same preset delay time for their external heating elements. However, for multiple fan coil units with different heating priorities, the preset delay time corresponding to the external heating elements of the fan coil unit with the higher heating priority is longer. In some examples, fan coil units with different heating priorities can be spaced by the same time interval or by different time intervals. For example, the difference between the preset delay time of the third heating priority fan coil unit and the preset delay time of the fourth heating priority fan coil unit, and the difference between the preset delay time of the second heating priority fan coil unit and the preset delay time of the third heating priority fan coil unit, can be the same or different.

[0101] In this embodiment, after a preset delay time corresponding to each fan coil unit, the heating element outside the fan coil unit is activated to heat the fan coil unit. In some examples, there are multiple fan coil units, such as a first-priority fan coil unit and a second-priority fan coil unit. The preset delay time of the second-priority fan coil unit is longer than that of the first-priority fan coil unit. After the heating element outside the first-priority fan coil unit is activated, the heating element outside the second-priority fan coil unit is activated after a certain period of time.

[0102] In some embodiments, heating elements outside the fan coil units are activated to heat the fan coil units after a preset delay time corresponding to each fan coil unit, including:

[0103] The opening interval time between two adjacent heating elements is determined based on the preset delay time corresponding to each fan coil unit.

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

[0105] Specifically, the two adjacent heating elements to be activated refer to the heating elements outside the fan coil units corresponding to two adjacent heating priorities, such as the heating element outside the fan coil unit with the third priority and the heating element outside the fan coil unit with the fourth priority. Each fan coil unit's heating priority corresponds to a preset delay time. Based on the preset delay time corresponding to the fan coil units corresponding to two adjacent heating priorities, the activation interval time of the heating elements outside the fan coil units corresponding to two adjacent heating priorities is determined. That is, after the heating element outside the fan coil unit corresponding to the previous heating priority is activated, the next heating priority's heating element is activated after an activation interval time, in order to avoid the situation where the activation times of two adjacent heating priorities are extremely close, thus avoiding impact on the power grid.

[0106] In some examples, a first-priority fan coil unit and a second-priority fan coil unit are used. After the heating element outside the first-priority fan coil unit is activated to heat the first-priority fan coil unit, the heating element outside the second-priority fan coil unit is activated to heat the second-priority fan coil unit after an on / off interval.

[0107] Example 2:

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

[0109] The control unit is used to periodically acquire the ambient temperature of the target environment through a temperature controller when the fan coil unit is in a stopped state, and determine the rate of temperature drop of the target environment when the ambient temperature shows a decreasing trend; acquire the first tube temperature of the fan coil unit through a temperature sensor, and predict the first temperature drop time based on the first tube temperature and the rate of temperature drop; 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. The thermostat contains a temperature sensor, and the cloud can receive the ambient temperature and fan coil unit temperature transmitted by the thermostat in real time and display them to the user for decision-making. The thermostat monitors, stores, and displays the ambient temperature, calculates the temperature drop rate, receives and stores the fan coil unit temperature monitored by the fan board, and sends protection start or stop commands from the host computer to the fan board. The number of fan boards corresponds to the number of fan coil units. Temperature sensors are mounted on the fan boards, which can monitor the fan coil unit temperature in real time and feed it back to the host computer for the thermostat to calculate and make decisions. The thermostat can also receive heating protection commands from the host computer to control the electric heating operation of the fan coil units. Heating elements, which are electric heating strips, are located outside the fan coil units. These electric heating strips are arranged between the fan coil units, generating heat and transferring it to the fan coil units after being energized.

[0111] In this embodiment, when the fan coil unit is in a stopped state, the ambient temperature of the target environment is periodically acquired. When the ambient temperature shows a decreasing trend, the rate of temperature drop in the target environment is determined. The first pipe temperature of the fan coil unit is acquired, and the first temperature drop time is predicted based on the first pipe temperature and the rate of temperature drop, and it is determined 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, the heating element outside the fan coil unit is activated to heat the fan coil unit. In this way, by combining the first pipe temperature of the fan coil unit with the ambient temperature of the target environment, the first temperature drop time is obtained, and the fan coil unit is preemptively heated for protection. This effectively reduces the probability of water in the fan coil unit freezing and expanding due to volume expansion, which can easily damage the pipes, thus saving maintenance costs.

[0112] Example 3:

[0113] like Figure 4 and Figure 5 As shown, this embodiment provides exemplary content for Embodiment 1 and Embodiment 2, that is, an exemplary process for a fan coil unit heating protection method and device, specifically including:

[0114] The cloud platform can receive real-time indoor ambient temperature and fan coil unit temperature information from the thermostat and display it to the user for decision-making. The cloud platform also allows for setting the activation priority of fan coil unit temperature protection, with a default five-level priority system, as follows:

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

[0116] The priority settings include setting the number of priorities and setting the temperature control range for each level.

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

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

[0119] Temperature sensors 1, 2…n monitor the instantaneous temperature t' of fan coil units 1, 2…n (an approximation of the temperatures t1', t2', t3'… of each fan coil unit), and predict the time T required for t' to drop to 0℃ based on the temperature drop rate v calculated using equation (1). When T < 2h, the thermostat sends a protection start command to start heating protection; when T > 5h, the thermostat sends a protection stop command to stop heating protection.

[0120] The fan board is equipped with a temperature sensor, which can monitor the fan coil temperature in real time and feed it back to the host computer for the temperature controller 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] Electric heating belts are arranged between the fan coil units. When powered on, they generate heat and transfer it to the fan coil units.

[0122] In this embodiment, the fan coil unit is heated by external heating elements before its temperature drops to freezing point. Heating protection is activated sequentially according to the fan coil unit's priority to prevent simultaneous activation from impacting the power grid. The first temperature drop time is determined by combining the fan coil unit's temperature with the target ambient temperature. This allows for proactive, phased, and sequential heating protection of the fan coil units, preventing damage to the central air conditioning terminal fan coil units, avoiding excessive power load impacting the power grid, and extending equipment lifespan.

[0123] Example 4:

[0124] Another embodiment of this application relates to a fan coil unit heating protection device. The implementation details of this fan coil unit heating protection device are described below. The following details are for ease of understanding and are not essential for implementing this solution. A schematic diagram of the fan coil unit heating protection device in this embodiment can be seen as follows: Figure 2 As shown, it includes:

[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 stopped state.

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

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

[0128] The judgment module 204 is used to determine 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 logical modules. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. Furthermore, to highlight the innovative aspects of this application, this embodiment does not introduce units that are not closely related to solving the technical problems proposed in this application; however, this does not mean that other units are absent in this embodiment.

[0131] Example 5:

[0132] Another embodiment of this application relates to an electronic device, such as... Figure 3 As shown, it includes: at least one processor 901; and a memory 902 communicatively connected to the at least one processor 901; wherein the memory 902 stores instructions executable by the at least one processor 901, the instructions being executed by the at least one processor 901 to enable the at least one processor 901 to perform the fan coil heating protection method in the above embodiments.

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

[0134] The processor manages the bus and general processing, and also provides various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory is used to store data used by the processor during operation.

[0135] Example 6:

[0136] Another embodiment of this application relates to a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the method embodiments described above.

[0137] That is, those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0138] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A method for protecting the heating of a fan coil unit, characterized in that, The air conditioning system to which the fan coil unit belongs operates in the target environment, and the method includes: When the fan coil unit is in a stopped state, the ambient temperature of the target environment is periodically acquired; When the ambient temperature shows a decreasing trend, the rate of temperature drop of the target environment is determined; The first tube temperature of the fan coil unit is obtained, and the first temperature drop time is predicted based on the first tube temperature and the temperature drop rate. The first temperature drop time is the time required for the fan coil unit to drop from the first tube 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, the heating element outside the fan coil unit is activated to heat the fan coil unit; The first temperature drop time is calculated using the following formula: ； In the formula, T is the time of the first temperature drop. The temperature of the first tube body. v is the preset temperature, and v is the rate of temperature drop; the preset temperature is set to 0℃.

2. The fan coil unit heating protection method according to claim 1, characterized in that, After activating the heating element outside the fan coil unit to heat the fan coil unit, the method further includes: The second tube temperature of the fan coil unit is periodically acquired, and the second temperature drop time is predicted based on the second tube 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 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 of the fan coil unit by the heating element outside the fan coil unit is turned off.

3. The fan coil unit heating protection method according to claim 1, characterized in that, The step of activating 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 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 temperature obtained in the current cycle; wherein, the higher the heating priority, the higher the temperature value of the preset temperature range to which the first tube temperature belongs. Based on the heating priority of the fan coil unit, the heating element outside the fan coil unit is activated to heat the fan coil unit.

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

5. The fan coil unit heating protection method according to claim 1, characterized in that, The number of fan coil units is multiple; The step of activating external heating elements to heat the fan coil unit based on its heating priority includes: Based on the heating priority of each fan coil unit, the heating element outside the fan coil unit is activated to heat the fan coil unit after a 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 the activation of the heating element outside the fan coil unit.

6. The fan coil unit heating protection method according to claim 5, characterized in that, The step of activating the heating element outside the fan coil unit to heat the fan coil unit after a preset delay time corresponding to each of the fan coil units includes: The opening interval time between two adjacent heating elements is determined based on the preset delay time corresponding to each fan coil unit. Based on the aforementioned activation interval, the heating elements outside the fan coil unit are sequentially activated to heat the fan coil unit.

7. A fan coil unit heating protection device, characterized in that, include: Thermostat, temperature sensor, heating element installed outside the fan coil unit, and control unit; The control unit is used to periodically acquire the ambient temperature of the target environment through the temperature controller when the fan coil unit is in a stopped state, and determine the temperature drop rate of the target environment when the ambient temperature shows a decreasing trend; acquire the first tube temperature of the fan coil unit through the temperature sensor, and predict a first temperature drop time based on the first tube 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, activate the heating element outside the fan coil unit to heat the fan coil unit, wherein the first temperature drop time is calculated using the following relationship: ； In the formula, T is the time of the first temperature drop. The temperature of the first tube body. v is the preset temperature, and v is the rate of temperature drop; the preset temperature is set to 0℃.

8. A fan coil unit heating protection device, characterized in that, include: The acquisition module is used to periodically acquire the ambient temperature of the target environment when the fan coil unit is in a stopped state. A rate determination module is used to determine the rate of temperature drop of the target environment when the ambient temperature shows a decreasing trend. The time prediction module is used to obtain the first tube temperature of the fan coil unit and predict the first temperature drop time based on the first tube temperature and the temperature drop rate. The first temperature drop time is the time required for the fan coil unit to drop from the first tube temperature to a preset temperature. The judgment module is used to determine whether the first temperature drop time is less than a preset first time threshold. The heating control module is used to activate 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. The first temperature drop time is calculated using the following formula: ； In the formula, T is the time of the first temperature drop. The temperature of the first tube body. v is the preset temperature, and v is the rate of temperature drop; the preset temperature is set to 0℃.

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 to enable the at least one processor to perform the fan coil heating protection method as described in 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 the processor, it implements the fan coil heating protection method according to any one of claims 1 to 6.

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