Control method, control device, heating and ventilation equipment and storage medium

Abstract

The invention discloses a control method, a control device, heating and ventilation equipment and a storage medium. The control method comprises the steps that initial operation parameters of an indoor unit when a fan coil operates at at least two set rotating speeds are obtained; the current operation parameters of the indoor unit of the fan coil at the current set rotating speed are detected at the preset frequency; determining a target rotating speed according to the current operation parameter and the initial operation parameter, wherein the target rotating speed is one of set rotating speeds; and controlling the fan coil to operate at the target rotating speed. According to the control method, the rotating speed of the fan coil can be adjusted according to the current operation parameters, so that the air outlet stability of the fan coil is guaranteed, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a control method, a control device, a heating and ventilation equipment and a storage medium for a fan coil unit. Background Art

[0002] The fan coil unit is a terminal air handling device for air conditioners and an important device for heat exchange in large air conditioning and refrigeration systems. It is currently widely used in large public places such as shopping malls, stations, and hotels. Since the fan coil unit is a terminal device that directly supplies air to the room, the stability of the fan coil unit's air output directly affects the user's experience of the unit. However, due to the wide variety of fan coil unit usage occasions, the motor wind resistance will be different in different application scenarios, resulting in poor air output stability of the fan coil unit. Summary of the invention

[0003] Embodiments of the present application provide a control method, a control device, a HVAC device, and a non-volatile computer-readable storage medium for a fan coil unit.

[0004] The fan coil control method provided in the embodiment of the present application is used for a HVAC device, wherein the HVAC device includes the indoor unit, and the control method includes:

[0005] Obtaining initial operating parameters of the indoor unit of the fan coil unit when the fan coil unit is operated at at least two set speeds;

[0006] Detecting the current operating parameters of the indoor unit of the fan coil at the current set speed at a preset frequency;

[0007] determining a target speed according to the current operating parameters and the initial operating parameters, the target speed being one of the set speeds; and

[0008] The fan coil unit is controlled to operate at the target rotation speed.

[0009] In some embodiments, the set speed includes a first set speed and a second set speed, the initial operating parameters include a first initial operating parameter and a second initial operating parameter, and obtaining the initial operating parameters of the indoor unit when the fan coil unit operates at at least two set speeds includes:

[0010] Controlling the fan coil unit to operate at a first set speed;

[0011] detecting a first initial operating parameter of the indoor unit after running at the first set speed for a first preset time;

[0012] Controlling the fan coil unit to operate at a second set speed;

[0013] After the indoor unit is operated at the second set speed for a second preset time period, a second initial operating parameter of the indoor unit is detected.

[0014] In some embodiments, determining a target speed according to the current operating parameters and the initial operating parameters, the target speed being one of the set speeds, includes:

[0015] When the current set speed is the second set speed and the current operating parameter belongs to a first range, the first set speed is used as the target speed, and the first range is obtained according to the second initial operating parameter; or

[0016] When the current set speed is the second set speed and the current operating parameter does not belong to the first range, the second set speed is used as the target speed.

[0017] In some embodiments, determining a target speed according to the current operating parameters and the initial operating parameters, the target speed being one of the set speeds, includes:

[0018] When the current set speed is the first set speed and the current operating parameter belongs to the second range, the first set speed is used as the target speed, and the second range is obtained according to the first initial operating parameter; or

[0019] When the current set speed is the first set speed and the current operating parameter does not belong to the second range, the second set speed is used as the target speed.

[0020] In some embodiments, the set speed further includes a third set speed, the initial operating parameter further includes a third initial operating parameter, and obtaining the initial operating parameters of the indoor unit when the fan coil unit operates at at least two set speeds further includes:

[0021] Controlling the fan coil unit to operate at a third set speed;

[0022] After the indoor unit is operated at the third set speed for a third preset time period, a third initial operating parameter of the indoor unit is detected.

[0023] In some embodiments, determining a target speed according to the current operating parameters and the initial operating parameters, the target speed being one of the set speeds, includes:

[0024] When the current set speed is a third set speed and the current operating parameter belongs to a third range, the first set speed is used as the target speed, and the third range is obtained according to the third initial operating parameter; or

[0025] When the current set speed is the third set speed and the current operating parameter is greater than a third range, the second set speed or the third set speed is used as the target speed.

[0026] In some embodiments, the initial operating parameter includes at least one of power and current.

[0027] The control device of the embodiment of the present application includes:

[0028] An acquisition module, used for acquiring initial operation parameters of the indoor unit of the fan coil unit when the fan coil unit is operated at at least two set speeds;

[0029] A detection module, used for detecting the current operating parameters of the indoor unit of the fan coil unit at the current set speed at a preset frequency;

[0030] a determination module, configured to determine a target speed according to the current operating parameters and the initial operating parameters, wherein the target speed is one of the set speeds; and

[0031] A control module is used to control the fan coil unit to operate at the target speed.

[0032] The HVAC equipment of the embodiment of the present application includes a processor and a memory, wherein the memory stores a computer program. When the computer program is executed by the processor, the processor implements the control method.

[0033] The non-volatile computer-readable storage medium of the embodiment of the present application includes a computer program, and when the computer program is executed by a processor, the processor implements the control method.

[0034] In the control method, control device, HVAC equipment and storage medium of the fan coil unit in the implementation mode of the present application, by acquiring the initial operating parameters of each set speed, and detecting the current operating parameters of the indoor unit of the fan coil unit at the current set speed at a preset frequency, since the indoor unit is in different operating modes, even if the fan coil unit is at the same set speed, the operating parameters may be different, that is, the operating parameters may be different under different operating modes. Therefore, the operating mode of the indoor unit can be identified based on the current operating parameters and the initial operating parameters, so that the corresponding target speed can be set according to the identified working mode, and finally the fan coil unit is controlled to operate at the target speed. In this way, the stability of the air output of the fan coil unit is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0036] Figure 1 is a flow chart of a control method of certain embodiments of the present application;

[0037] Figure 2 is a schematic diagram of a module of a control device in certain embodiments of the present application;

[0038] Figure 3-6 It is a flow chart of the control method of certain embodiments of the present application. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and cannot be understood as limiting the embodiments of the present invention.

[0040] The fan coil unit is an air handling device at the end of the air conditioner. It is an important device for heat exchange in large air conditioning and refrigeration systems. It is currently widely used in large public places such as shopping malls, stations, and hotels. Since the fan coil unit is a terminal device, its main functions are air supply, cooling, and heating. In the above functional application scenarios, the state of the heat exchanger surface is often different. In different application scenarios, the motor wind resistance will be different. At the same speed, different wind resistances will cause different degrees of air volume attenuation. Especially when cooling, the condensed water produced will greatly increase the wind resistance, resulting in a significant attenuation of air volume, affecting the cooling effect.

[0041] In the related art, a solution is adopted to increase the size of the heat exchanger, thereby increasing the heat exchange area to increase the heat exchange amount, but this will increase the cost and require adjustment of the flow path to increase the water resistance. Or a high speed solution is adopted, however, it will lead to the problem of excessive power.

[0042] In view of this, please refer to Figure 1 The embodiment of the present application provides a control method for a fan coil unit, which is used for a HVAC device, and the HVAC device includes an indoor unit. The control method includes:

[0043] 01: Get the initial operating parameters of the indoor unit of the fan coil unit under at least two set speeds;

[0044] 02: Detect the current operating parameters of the indoor unit of the fan coil at the current set speed at the preset frequency;

[0045] 03: Determine the target speed according to the current operating parameters and the initial operating parameters, and the target speed is one of the set speeds; and

[0046] 04: Control the fan coil to run at the target speed.

[0047] See also Figure 2 This embodiment also provides a fan coil unit control device 10 , the control device 10 includes an acquisition module 110 , a detection module 120 , a determination module 130 and a control module 140 .

[0048] Step 01 can be implemented by the acquisition module 110, step 02 can be implemented by the detection module 120, step 03 can be implemented by the determination module 130, and step 04 can be implemented by the control module 140. That is, the acquisition module 110 is used to acquire the initial operating parameters of the indoor unit of the fan coil unit under at least two set speeds; the detection module 120 is used to detect the current operating parameters of the indoor unit of the fan coil unit under the current set speed at a preset frequency; the determination module 130 is used to determine the target speed according to the current operating parameters and the initial operating parameters, and the target speed is one of the set speeds; the control module 140 is used to determine the target speed according to the current operating parameters and the initial operating parameters, and the target speed is one of the set speeds.

[0049] The embodiment of the present application also provides a HVAC device, which includes a processor and a memory, wherein the memory stores a computer program. When the computer program is executed by the processor, the processor executes the above-mentioned control method, that is, the processor can be used to obtain the initial operating parameters of the indoor unit of the fan coil unit under at least two set speeds; detect the current operating parameters of the indoor unit of the fan coil unit under the current set speed at a preset frequency; and determine the target speed based on the current operating parameters and the initial operating parameters, the target speed being one of the set speeds; and control the fan coil unit to operate at the target speed.

[0050] In the control method, control device 10 and HVAC equipment of the present application, by acquiring the initial operating parameters of each set speed, and detecting the current operating parameters of the indoor unit of the fan coil unit at the current set speed at a preset frequency, since the indoor unit is in different working modes, even if the fan coil unit is at the same set speed, the operating parameters may be different, that is, different working modes may cause different operating parameters. Therefore, the working mode of the indoor unit can be identified based on the current operating parameters and the initial operating parameters, so that the corresponding target speed can be set according to the identified working mode, and finally the fan coil unit is controlled to operate at the target speed. In this way, the stability of the air output of the fan coil unit is ensured.

[0051] In some embodiments, the control device 10 may be a part of a HVAC device. In other words, the HVAC device includes the control device 10 .

[0052] In some embodiments, the control device 10 may be a discrete component assembled in a certain manner to have the aforementioned functions, or a chip having the aforementioned functions in the form of an integrated circuit, or a computer software code segment that enables the computer to have the aforementioned functions when running on the computer.

[0053] In some embodiments, as hardware, the control device 10 can be independent or installed as an additional peripheral component in the HVAC equipment. The control device 10 can also be integrated into the HVAC equipment, for example, when the control device 10 is a part of the HVAC equipment, the control device 10 can be integrated into the processor.

[0054] HVAC equipment refers to mechanical equipment used to adjust indoor environmental parameters such as temperature, humidity, and air quality. HVAC equipment may include but is not limited to air conditioning equipment (such as central air conditioning, split air conditioning), heating equipment (such as air source heat pump), etc. In this embodiment, HVAC equipment can be described by taking air conditioning equipment as an example. HVAC equipment may include multiple working modes such as cooling, heating, and air supply.

[0055] The HVAC equipment may include an indoor unit, which may include a fan coil unit. The fan coil unit continuously circulates the indoor or outdoor air and passes the air through the cold water (or hot water) coil to achieve a cooling (or heating) effect and maintain a constant indoor temperature. At the same time, the fresh air is processed by the fan and sent into the room to meet the demand for fresh air volume in the air-conditioned room. The fan coil unit may include a heat exchanger, a fan, a housing, and a controller, among which the heat exchanger is used to achieve heat exchange, and the fan is used to drive the air flow and increase the heat exchange efficiency. The controller can be used to adjust the temperature and humidity to ensure the indoor air comfort. The fan can use a DC brushless motor.

[0056] It should be noted that the operating parameters may include at least one of the current of the indoor unit and the whole unit power, etc. In this embodiment, the operating parameters may be described by taking the whole unit power of the indoor unit as an example, that is, the operating parameters may not be limited to the whole unit power. Both the initial operating parameters and the current operating parameters belong to the operating parameters, and the difference between the initial operating parameters and the current operating parameters is only the different timing of acquisition.

[0057] In step 01, the initial operating parameters of the indoor unit when the fan coil unit is running at at least two set speeds can be detected after the indoor unit is powered on, that is, after the indoor unit is powered on, the fan coil unit is operated at multiple set speeds, and the initial operating parameters of the indoor unit such as power are detected. The types of set speeds can be 2, 3, 4 or even more. In addition, when obtaining the initial operating parameters, the cooling mode or heating mode is not turned on.

[0058] The type of set speed is related to the working mode of the HVAC equipment, and each set speed corresponds to at least one working mode. For example, there are two types of set speeds, one of which corresponds to air supply or heating mode, and the other corresponds to cooling mode. The set speed corresponding to the cooling mode can be greater than the set speed corresponding to the air supply or heating mode. In this way, the fan speed in the cooling mode can be increased to ensure that the cooling capacity is not attenuated. For another example, there are three types of set speeds, one of which corresponds to air supply mode, one corresponds to heating mode, and the other corresponds to cooling mode.

[0059] It can be understood that the initial operating parameters will be different when the set speed is different. For example, in some examples, if the initial operating parameter is the total power of the indoor unit, the set speed includes 920 and 950. The total power corresponding to the set speed of 920 is 43 watts, and the total power corresponding to the set speed of 950 is 46 watts.

[0060] In step 02, the preset frequency can be set according to actual conditions. For example, in some examples, the preset frequency can be 30 times / hour, that is, the current operating parameters of the indoor unit of the fan coil unit at the current set speed are detected every 120 seconds.

[0061] In step 03, the current operating parameters can be compared with the acquired initial operating parameters to identify the current operating mode of the HVAC equipment, and the set speed corresponding to the current operating mode is set as the target speed. For example, according to the comparison between the current operating parameters and the initial operating parameters, it is identified that the current operating mode of the HVAC equipment is the cooling mode, and the set speed corresponding to the cooling mode is used as the target speed.

[0062] In this way, after controlling the fan coil unit to run at the target speed, the stability of the fan coil unit's air output can be guaranteed, thereby improving the user experience.

[0063] Please combine Figure 3 In some embodiments, the set speed includes a first set speed and a second set speed, the initial operating parameters include a first initial operating parameter and a second initial operating parameter, and 01 includes:

[0064] 011: Control the fan coil to run at the first set speed;

[0065] 012: Detecting a first initial operating parameter of the indoor unit after running at a first set speed for a first preset time;

[0066] 013: Control the fan coil to run at the second set speed;

[0067] 014: Detecting the second initial operating parameters of the indoor unit after running at the second set speed for a second preset time.

[0068] Please further combine Figure 2 In some embodiments, 011-014 can be implemented by the acquisition module 110, or in other words, the acquisition module 110 can be used to control the fan coil unit to operate at a first set speed; detect the first initial operating parameters of the indoor unit after running at the first set speed for a first preset time; control the fan coil unit to operate at a second set speed; and detect the second initial operating parameters of the indoor unit after running at the second set speed for a second preset time.

[0069] In some embodiments, the processor can be used to control the fan coil unit to operate at a first set speed; detect the first initial operating parameters of the indoor unit after running at the first set speed for a first preset period of time; control the fan coil unit to operate at a second set speed; and detect the second initial operating parameters of the indoor unit after running at the second set speed for a second preset period of time.

[0070] It should be noted that the first preset time is related to the time required for the fan coil unit to start running at the first set speed and then run stably, and the second preset time is related to the time required for the fan coil unit to start running at the second set speed and then run stably. The first preset time can be the same or different.

[0071] The second set speed can be greater than the first set speed. For example, in some examples, the first set speed is 920 rpm and the second set speed is 950 rpm. The initial operation parameter can be the total power of the indoor unit. If the first preset time and the second preset time are both equal to 60 seconds. After powering on, the fan coil is controlled to run at a speed of 920 rpm, and the first total power P1 of the indoor unit is detected after 60 seconds. Then, the fan coil is controlled to run at a speed of 950 rpm, and the second total power P2 of the indoor unit is detected after 60 seconds.

[0072] In this way, the accuracy of the first initial operating parameters and the second initial operating parameters are ensured by detecting the first initial operating parameters of the indoor unit after running at the first set speed for the first preset time and detecting the second initial operating parameters of the indoor unit after running at the second set speed for the second preset time.

[0073] Please combine Figure 4 In some embodiments, 03 includes:

[0074] 031: when the current set speed is the second set speed and the current operating parameter belongs to the first range, the first set speed is used as the target speed, and the first range is obtained according to the second initial operating parameter; or

[0075] 032: When the current set speed is the second set speed and the current operating parameter does not belong to the first range, the second set speed is used as the target speed.

[0076] Please further combine Figure 2 In some embodiments, 031-032 can be implemented by the determination module 130, or in other words, the acquisition module 110 can be used to use the first set speed as the target speed when the current set speed is the second set speed and the current operating parameter belongs to the first range interval, and the first range interval is obtained according to the second initial operating parameter; or when the current set speed is the second set speed and the current operating parameter does not belong to the first range interval, use the second set speed as the target speed.

[0077] In some embodiments, the processor can be used to use the first set speed as the target speed when the current set speed is the second set speed and the current operating parameter belongs to the first range interval, and the first range interval is obtained based on the second initial operating parameter; or use the second set speed as the target speed when the current set speed is the second set speed and the current operating parameter does not belong to the first range interval.

[0078] In this embodiment, the first set speed is used as the rated speed of the fan coil unit in the air supply and heating modes, and the second set speed is used as the rated speed of the fan coil unit in the cooling mode, and the second set speed is greater than the first set speed. When the current set speed is the second set speed and the current operating parameter belongs to the first range interval, it means that the fan coil unit is in the air supply mode or the heating mode, and the first set speed is used as the target speed. In this way, the fan coil unit can be operated at the first set speed when it is in the air supply mode or the heating mode, thereby reducing the energy consumption of the fan coil unit. When the current set speed is the second set speed and the current operating parameter does not belong to the first range interval, it means that the fan coil unit is in the cooling mode, and the corresponding second set speed in the cooling mode is used as the target speed. In this way, the fan coil unit can be operated at the second set speed when it is in the air supply mode or the heating mode, ensuring that the cooling capacity in the cooling mode does not decay.

[0079] The first range interval is a range interval set based on the size of the second initial operating parameter. When the operating parameter is the total power of the fan coil unit, if the second initial operating parameter is P2, the first range interval can be (P2-△P, P2+△P). △P can be obtained based on experiments. For example, if the second initial operating parameter is 46 watts, the first range interval can be (45, 47).

[0080] See also Figure 5 In some embodiments, 03 further includes:

[0081] 033: when the current set speed is the first set speed and the current operating parameter belongs to the second range, the first set speed is used as the target speed, and the second range is obtained according to the first initial operating parameter; or

[0082] 034: When the current set speed is the first set speed and the current operating parameter does not belong to the second range, the second set speed is used as the target speed.

[0083] Please further combine Figure 2 In some embodiments, 033-034 can be implemented by the determination module 130, or in other words, the acquisition module 110 can be used to use the first set speed as the target speed when the current set speed is the first set speed and the current operating parameter belongs to the second range interval, and the second range interval is obtained according to the first initial operating parameter; or when the current set speed is the first set speed and the current operating parameter does not belong to the second range interval, use the second set speed as the target speed.

[0084] In some embodiments, the processor can be used to use the first set speed as the target speed when the current set speed is the first set speed and the current operating parameter belongs to the second range interval, and the second range interval is obtained according to the first initial operating parameter; or use the second set speed as the target speed when the current set speed is the first set speed and the current operating parameter does not belong to the second range interval.

[0085] In this embodiment, the first set speed is used as the rated speed of the fan coil unit in the air supply and heating modes, and the second set speed is used as the rated speed of the fan coil unit in the cooling mode, and the second set speed is greater than the first set speed. When the current set speed is the first set speed and the current operating parameter belongs to the second range interval, it means that the fan coil unit is in the air supply mode or the heating mode, and the first set speed is used as the target speed. In this way, the fan coil unit can be operated at the first set speed when it is in the air supply mode or the heating mode, thereby reducing the energy consumption of the fan coil unit. When the current set speed is the first set speed and the current operating parameter does not belong to the first range interval, it means that the fan coil unit is in the cooling mode, and the corresponding second set speed in the cooling mode is used as the target speed. In this way, the fan coil unit can be operated at the second set speed when it is in the air supply mode or the heating mode, ensuring that the cooling capacity in the cooling mode does not decay.

[0086] The second range interval is a range interval set based on the size of the first initial operating parameter. When the operating parameter is the total power of the fan coil unit, if the first initial operating parameter is P1, the first range interval can be (P1-△P, P1+△P). Among them, △P can be obtained based on experiments. For example, if the first initial operating parameter is 43 watt-hours, the first range interval can be (42, 44).

[0087] Please combine Figure 6 In some embodiments, 02 further includes:

[0088] 015: Control the fan coil to run at the third set speed;

[0089] 016: Detecting a third initial operating parameter of the indoor unit after running at a third set speed for a third preset time period.

[0090] In some embodiments, 015-016 can be implemented by the acquisition module 110, or in other words, the acquisition module 110 can be used to control the fan coil unit to operate at a third set speed; and detect the third initial operating parameters of the indoor unit after running at the third set speed for a third preset time.

[0091] In some embodiments, the processor may be configured to control the fan coil unit to operate at a third set speed; and detect a third initial operating parameter of the indoor unit after the fan coil unit operates at the third set speed for a third preset time period.

[0092] It should be noted that the third preset time is related to the time required for the fan coil unit to start running at the third set speed and then run stably. The third preset time may be the same as or different from the first preset time and the second preset time. The third set speed may be greater than the second set speed.

[0093] For example, in some examples, the first set speed is 900 rpm, the second set speed is 920 rpm, and the third set speed is 950 rpm. The initial operating parameter may be the whole machine power of the indoor unit. If the first preset time, the second preset time, and the third preset time are all equal to 60 seconds. After powering on, the fan coil is controlled to run at a speed of 900 rpm, and the first whole machine power P1 of the indoor unit is detected after 60 seconds; then the fan coil is controlled to run at a speed of 920, and the second whole machine power P2 of the indoor unit is detected after 60 seconds, and the fan coil is controlled to run at a speed of 950, and the third whole machine power P3 of the indoor unit is detected after 60 seconds.

[0094] In this way, by detecting the third initial operating parameter of the indoor unit after the fan coil unit operates at the third set speed for the third preset time period, the accuracy of the third initial operating parameter is ensured.

[0095] Please further combine Figure 6 In some embodiments, 03 includes:

[0096] 035: when the current set speed is the third set speed and the current operating parameter belongs to the third range, the first set speed is used as the target speed, and the third range is obtained according to the third initial operating parameter; or

[0097] 036: When the current set speed is the third set speed and the current operating parameter is greater than the third range, the second set speed or the third set speed is used as the target speed.

[0098] Please further combine Figure 2 In some embodiments, 035-036 can be implemented by the determination module 130, or in other words, the determination module 130 can be used to use the first set speed as the target speed when the current set speed is the third set speed and the current operating parameter belongs to the third range interval, and the third range interval is obtained according to the third initial operating parameter; or when the current set speed is the third set speed and the current operating parameter is greater than the third range interval, use the second set speed or the third set speed as the target speed.

[0099] In some embodiments, the processor can be used to use the first set speed as the target speed when the current set speed is the third set speed and the current operating parameter belongs to a third range interval, and the third range interval is obtained based on the third initial operating parameter; or use the second set speed or the third set speed as the target speed when the current set speed is the third set speed and the current operating parameter is greater than the third range interval.

[0100] In this embodiment, the first set speed may be the rated speed of the fan coil unit in the air supply mode, the second set speed may be the rated speed of the fan coil unit in the heating mode, and the third set speed may be the rated speed of the fan coil unit in the cooling mode. The second set speed may be greater than the first set speed, and the third set speed may be greater than the second set speed.

[0101] When the current set speed is the third set speed and the current operating parameter belongs to the third range, it means that the fan coil unit is in the air supply mode, and the first set speed is used as the target speed. In this way, the fan coil unit can operate at the first set speed in the air supply mode, thereby reducing the energy consumption of the fan coil unit. When the current set speed is the first set speed and the current operating parameter is greater than the third range, it means that the fan coil unit is in the heating or cooling mode, and the second set speed or the third set speed is used as the target speed. In this way, the fan coil unit can operate at the second set speed in the heating mode and the third set speed in the heating mode, ensuring that the heating amount in the heating mode does not decay and the cooling amount in the cooling mode does not decay.

[0102] The third range interval is a range interval set based on the third initial operating parameter. When the operating parameter is the whole machine power of the fan coil unit, if the third initial operating parameter is P3, the third range interval can be (P3-△P, P3+△P). Among them, △P can be obtained according to experiments. For example, if the third initial operating parameter is 46 watt-hours, the third range interval can be (45, 47).

[0103] The embodiment of the present application also provides a non-volatile computer-readable storage medium, including a computer program, which, when executed by a processor, enables the processor to implement any of the above control methods.

[0104] In the storage medium of the implementation mode of the present application, by obtaining the initial operating parameters of each set speed, and detecting the current operating parameters of the indoor unit of the fan coil unit at the current set speed at a preset frequency, since the indoor unit is in different working modes, even if the fan coil unit is at the same set speed, the operating parameters may be different, that is, different working modes may cause different operating parameters. Therefore, the working mode of the indoor unit can be identified according to the current operating parameters and the initial operating parameters, so that the corresponding target speed can be set according to the identified working mode, and finally the fan coil unit is controlled to operate at the target speed. In this way, the stability of the air output of the fan coil unit is ensured.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0106] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

[0107] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A control method for a fan coil unit, used in HVAC equipment, characterized in that: The HVAC equipment includes an indoor unit, the indoor unit includes the fan coil unit, and the control method includes: Obtaining initial operating parameters of the indoor unit of the fan coil unit when the fan coil unit is operated at at least two set speeds; Detecting the current operating parameters of the indoor unit of the fan coil at the current set speed at a preset frequency; determining a target speed according to the current operating parameters and the initial operating parameters, the target speed being one of the set speeds; and The fan coil unit is controlled to operate at the target rotation speed.

2. The control method according to claim 1, characterized in that: The set speed includes a first set speed and a second set speed, the initial operating parameters include a first initial operating parameter and a second initial operating parameter, and obtaining the initial operating parameters of the indoor unit when the fan coil unit operates at at least two set speeds includes: Controlling the fan coil unit to operate at a first set speed; detecting a first initial operating parameter of the indoor unit after running the indoor unit at the first set speed for a first preset time; Controlling the fan coil unit to operate at a second set speed; After the indoor unit is operated at the second set speed for a second preset time period, a second initial operating parameter of the indoor unit is detected.

3. The control method according to claim 2, characterized in that: Determining a target speed according to the current operating parameter and the initial operating parameter, wherein the target speed is one of the set speeds, includes: When the current set speed is the second set speed and the current operating parameter belongs to a first range, the first set speed is used as the target speed, and the first range is obtained according to the second initial operating parameter; or When the current set speed is the second set speed and the current operating parameter does not belong to the first range, the second set speed is used as the target speed.

4. The control method according to claim 3, characterized in that: Determining a target speed according to the current operating parameter and the initial operating parameter, wherein the target speed is one of the set speeds, includes: When the current set speed is the first set speed and the current operating parameter belongs to the second range, the first set speed is used as the target speed, and the second range is obtained according to the first initial operating parameter; or When the current set speed is the first set speed and the current operating parameter does not belong to the second range, the second set speed is used as the target speed.

5. The control method according to claim 2, characterized in that: The set speed also includes a third set speed, the initial operating parameter also includes a third initial operating parameter, and obtaining the initial operating parameters of the indoor unit when the fan coil unit operates at at least two set speeds also includes: Controlling the fan coil unit to operate at the third set speed; After the indoor unit is operated at the third set speed for a third preset time period, a third initial operating parameter of the indoor unit is detected.

6. The control method according to claim 5, characterized in that: Determining a target speed according to the current operating parameter and the initial operating parameter, wherein the target speed is one of the set speeds, includes: When the current set speed is a third set speed and the current operating parameter belongs to a third range, the first set speed is used as the target speed, and the third range is obtained according to the third initial operating parameter; or When the current set speed is the third set speed and the current operating parameter is greater than a third range, the second set speed or the third set speed is used as the target speed.

7. The control method according to any one of claims 1 to 6, characterized in that: The initial operating parameters include at least one of power and current.

8. A fan coil unit control device for HVAC equipment, characterized in that: The HVAC equipment includes an indoor unit, the indoor unit includes the fan coil unit, and the control device includes: An acquisition module, used for acquiring initial operation parameters of the indoor unit of the fan coil unit when the fan coil unit is operated at at least two set speeds; A detection module, used for detecting the current operating parameters of the indoor unit of the fan coil unit at the current set speed at a preset frequency; a determination module, configured to determine a target speed according to the current operating parameters and the initial operating parameters, wherein the target speed is one of the set speeds; and A control module is used to control the fan coil unit to operate at the target speed.

9. A HVAC equipment, characterized in that: The invention comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor implements the control method according to any one of claims 1 to 7.

10. A non-volatile computer-readable storage medium, characterized in that: The invention comprises a computer program, and when the computer program is executed by a processor, the processor is enabled to implement the control method according to any one of claims 1 to 7.

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