CN111076382B - Fan coil cold-wind-proof control method and device, medium and water multi-connected air conditioning system - Google Patents

Fan coil cold-wind-proof control method and device, medium and water multi-connected air conditioning system Download PDF

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Publication number
CN111076382B
CN111076382B CN201911223165.4A CN201911223165A CN111076382B CN 111076382 B CN111076382 B CN 111076382B CN 201911223165 A CN201911223165 A CN 201911223165A CN 111076382 B CN111076382 B CN 111076382B
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temperature
wind
value
fan coil
room temperature
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CN111076382A (en
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李华松
何林
张世航
卢浩贤
耿媛媛
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00Control inputs relating to system states
    • F24F2140/20Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a fan coil cold air prevention control method, a fan coil cold air prevention control device, a medium and a water multi-connected air conditioning system, wherein the method comprises the following steps: after the fan coil enters a cold air prevention operation mode, acquiring the current room temperature of a room where the fan coil is located and the current set wind gear of the fan coil; controlling whether the fan coil exits the cold-proof operating mode based on the current operating temperature and the set wind gear. According to the scheme provided by the invention, the influence of the ambient temperature and the set wind shield on cold-proof wind control is considered, and the control strategy can better meet the requirement of human body comfort.

Description

Fan coil cold-wind-proof control method and device, medium and water multi-connected air conditioning system
Technical Field
The invention relates to the field of control, in particular to a water multi-connected system, a fan coil cold-wind-proof control method and device thereof, and a medium.
Background
The water multi-connected central air conditioner mainly comprises an external unit, a cold and hot water generator, a terminal device and a water pipeline system, wherein the control communication between the host and an indoor unit is increased when a fan coil is carried, so that an upgrading system of the traditional household central air conditioner, namely the water multi-connected central air conditioner, is formed, the fan coil is mainly carried for refrigerating and heating, meanwhile, the heating process supports the carrying of the fan coil and simultaneously carries a floor heater, 3D comprehensive heating is started, the water multi-connected main external unit is a split-cooling external unit and a compression refrigeration heating unit, the cold and hot water generator internally comprises a water pump and a shell and tube heat exchanger, the cold and heat of a fluorine path are transmitted to the water pipeline system, and then the.
The terminal fan coil can detect the current pipe temperature when being opened every time, and the fan coil is opened when the pipe temperature reaches a certain condition. At present, the cold wind prevention standards of users obtained by a water multi-connection product under different environmental temperatures and different user setting windscreens are different in the cold wind prevention control process, the problem of poor comfort is caused only by taking a pipe temperature value as judgment of cold wind entering and exiting conditions, cold wind blowing feeling can still be caused by the same cold wind prevention control under the conditions that the environmental temperature is relatively low and the user setting windscreens are relatively large, and the problem of unreasonable energy conservation exists in the control strategy of not considering the user setting values and the environmental temperature values.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provides a fan coil cold air prevention control method, a fan coil cold air prevention control device, a medium and a water multi-connected air conditioning system so as to solve the problem of poor comfort in the prior art that only the temperature value of a pipe is used for judging the cold air prevention condition of entering and exiting.
The invention provides a cold-wind prevention control method for a fan coil, which comprises the following steps: after the fan coil enters a cold air prevention operation mode, acquiring the current room temperature of a room where the fan coil is located and the current set wind gear of the fan coil; controlling whether the fan coil exits the cold-proof operating mode based on the current operating temperature and the set wind gear.
Optionally, controlling whether the fan coil exits the anti-cold wind operation mode based on the current operating temperature and the set wind gear comprises: determining exit conditions, which are required to be met by the tube temperature and the air outlet temperature of the fan coil, for exiting the cold-wind-proof operation mode according to the current room temperature and the set wind gear; and judging whether the temperature of the pipe and the temperature of the outlet air meet the exit condition, and if so, controlling the fan coil to exit the cold air prevention operation mode.
Optionally, the exit condition includes: the difference between the pipe temperature and the air outlet temperature and the difference between the air outlet temperature and the current room temperature meet temperature conditions; when the current room temperature is less than a preset temperature threshold, the exit condition includes: when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a first temperature value; when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a second temperature value; when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a third temperature value; when the current room temperature is greater than or equal to a preset temperature threshold, the exit condition includes: when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fourth temperature value; when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fifth temperature value; when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a sixth temperature value; wherein the first wind gear is lower than the second wind gear and lower than the third wind gear; the first preset threshold is larger than the second preset threshold and is larger than the third preset threshold; the first temperature value is less than the second temperature value and less than the third temperature value; the fourth temperature value is greater than the fifth temperature value and greater than the sixth temperature value.
Optionally, the fan coil tube temperature comprises: the average temperature value of more than two different parts of the fan coil.
In another aspect, the present invention provides a fan coil cold air prevention control device, including: the acquiring unit is used for acquiring the current room temperature of a room where the fan coil is located and the current set wind gear of the fan coil after the fan coil enters a cold air prevention operation mode; and the control unit is used for controlling whether the fan coil exits the cold-wind-proof operation mode or not based on the current room temperature and the set wind gear.
Optionally, the control unit includes: the determining subunit is used for determining an exit condition, which is required to be met by the temperature of the pipe of the fan coil and the air outlet temperature, for exiting the cold air preventing operation mode according to the current room temperature and the set wind gear; the judging subunit is used for judging whether the temperature of the pipe and the temperature of the outlet air meet the exit condition; and the control subunit is used for controlling the fan coil to exit the cold air prevention operation mode if the judging subunit judges that the exit condition is met.
Optionally, the exit condition includes: the difference between the pipe temperature and the air outlet temperature and the difference between the air outlet temperature and the current room temperature meet temperature conditions; when the current room temperature is less than a preset temperature threshold, the exit condition includes: when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a first temperature value; when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a second temperature value; when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a third temperature value; when the current room temperature is greater than or equal to a preset temperature threshold, the exit condition includes: when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fourth temperature value; when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fifth temperature value; when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a sixth temperature value; wherein the first wind gear is lower than the second wind gear and lower than the third wind gear; the first preset threshold is larger than the second preset threshold and is larger than the third preset threshold; the first temperature value is less than the second temperature value and less than the third temperature value; the fourth temperature value is greater than the fifth temperature value and greater than the sixth temperature value.
Optionally, the fan coil tube temperature comprises: the average temperature value of more than two different parts of the fan coil.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
In yet another aspect, the present invention provides a water multi-connected system, which includes a processor, a memory, and a computer program stored in the memory and operable on the processor, wherein the processor executes the computer program to implement the steps of any one of the foregoing methods.
The invention further provides a water multi-connected system which comprises the fan coil cold air prevention control device.
According to the technical scheme of the invention, after entering the cold wind prevention operation mode, whether the fan coil exits the cold wind prevention operation mode is controlled based on the current room temperature and the current set wind gear of the fan coil, the influence of the environment temperature and the set wind gear on cold wind prevention control is considered, the control strategy is reasonable, and whether the cold wind prevention coil exits is judged based on the difference value of the pipe temperature and the air outlet temperature and the difference value of the air outlet temperature and the current room temperature.
The temperature value monitored by the existing water multi-connected system in the cold air prevention control process is mostly the temperature collected at a point at the middle part of the coil as a tube temperature judgment value, but the detected tube temperature value is deviated from an actual value under the double action of the nonuniformity of the flow field in the air coil and the nonuniformity of the refrigerant in the tube, and the like.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a method for controlling a fan coil to prevent cold air according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram illustrating one embodiment of the step of controlling whether the fan coil exits the anti-wind mode of operation based on the current temperature and the set wind level;
FIG. 3 is a schematic diagram of a method for controlling a fan coil to prevent cold air, according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of an embodiment of a fan coil anti-cold air control device provided by the present invention;
fig. 5 is a block diagram of a specific implementation of a control unit according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a method schematic diagram of an embodiment of a fan coil cold-proof air control method provided by the invention.
As shown in fig. 1, according to an embodiment of the present invention, the fan coil anti-cold air control method includes at least steps S110 and S120.
And step S110, after the fan coil enters a cold air prevention operation mode, acquiring the current room temperature of the room where the fan coil is located and the current set wind gear of the fan coil.
Specifically, under the standby condition of the host, detecting whether the set temperature (namely a preset target room temperature tTarget) of the fan coil is greater than the current room temperature tCurrent of the room where the fan coil is located, namely whether the preset target room temperature tTarget meets the condition that the T Target-TCurrent > 0; if the set temperature of the fan coil is higher than the current room temperature of the room, the fact that the somatosensory temperature difference exists is indicated, and a heating mode is started; otherwise, the host computer is in standby state continuously; after a heating mode is started, whether the pipe temperature of the fan coil is smaller than a preset pipe temperature threshold value or not is detected, and if the pipe temperature of the fan coil is smaller than the preset pipe temperature threshold value, a cold air prevention operation mode is entered. For example, whether T pipe temperature is less than 35 ℃ is detected, if yes, the cold wind prevention operation mode is entered, and if not, the cold wind prevention operation mode is closed.
The fan coil temperature may comprise an average of temperatures at two or more different locations of the fan coil. For example, the average temperature of the upper, middle, and lower portions of the fan coil. The temperature value monitored by the existing water multi-connected system in the cold air prevention control process is mostly the temperature collected at a point at the middle part of the coil as a tube temperature judgment value, but the detected tube temperature value has deviation from an actual value under the double actions of the nonuniformity of the flow field in the air coil and the nonuniformity of the refrigerant in the tube, and the like.
And after the fan coil enters a cold air prevention operation mode, acquiring the current room temperature of the room where the fan coil is located and the current set wind gear of the fan coil. The current room temperature can be detected in real time through a temperature sensing probe installed at the return air inlet of the fan coil. The set wind gear is specifically a wind gear set by a user, and for example, the set wind gear comprises a high wind gear, a medium wind gear and/or a low wind gear.
And step S120, controlling whether the fan coil exits the cold air prevention operation mode or not based on the current temperature and the set wind gear.
FIG. 2 is a flowchart illustrating one embodiment of the step of controlling whether the fan coil exits the anti-wind mode of operation based on the current temperature and the set wind level. As shown in fig. 2, step S120 may specifically include step S121, step S122, and step S123.
And step S121, determining the exiting condition which is required to be met by the tube temperature and the air outlet temperature of the fan coil and exits from the cold-proof running mode according to the current room temperature and the set wind gear.
And S122, judging whether the tube temperature and the air outlet temperature meet the exit condition.
And S123, if the quit condition is judged to be met, controlling the fan coil to quit the cold air prevention operation mode.
Specifically, the air outlet temperature of the fan coil can be detected in real time through a temperature sensing probe installed at an air supply outlet of the fan coil. The fan coil temperature may comprise an average of temperatures at two or more different locations of the fan coil. For example, the average temperature of the upper, middle, and lower portions of the fan coil. The invention collects the average temperature value of more than two different parts of the fan coil, and the obtained temperature value is more objective and reliable.
The exit conditions comprise temperature conditions required to be met by the difference between the pipe temperature and the outlet air temperature and temperature conditions required to be met by the difference between the outlet air temperature and the current room temperature under different room temperatures and different set wind gears. And judging whether the temperature of the pipe and the temperature of the outlet air meet the exit condition, and if so, controlling the fan coil to exit the cold air prevention operation mode. If the exit condition is not met, continuing the current operation, namely returning to continuously judge whether the pipe temperature and the air outlet temperature meet the exit condition.
More specifically, when the current room temperature is less than a preset temperature threshold, the exit condition includes: when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a first temperature value; when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a second temperature value; and when the set wind shield is a third wind shield, the difference value between the pipe temperature and the air outlet temperature is smaller than a third preset threshold value, and the difference value between the air outlet temperature and the current room temperature is larger than or equal to a third temperature value. Wherein the first wind gear is lower than the second wind gear and lower than the third wind gear; for example, the first gear is a low gear, the second gear is a medium gear, and the third gear is a high gear. The first preset threshold is larger than the second preset threshold and is larger than the third preset threshold; for example, the first preset threshold is 8 ℃, the second preset threshold is 5 ℃, and the third preset threshold is 2 ℃. The first temperature value is less than the second temperature value and less than the third temperature value. For example, the first temperature value is a, the second temperature value is (a + Δt1), and the third temperature value is (a + Δt 2).
For example, the preset temperature threshold is 12 ℃, and the current room temperature tRoom temperature<12 ℃; when the user defines the windshield as a low wind gear, the current pipe temperature T is the pipe temperature and the air outlet temperature T is the temperatureAir outletT pipe temperature-T air-out is less than 8 ℃, at the moment, the air-out temperature T air-out is equal to T room temperature + A, if the above conditions are met, the cold air prevention mode is quitted,otherwise, continuing the current operation; when the user defines the windshield as the middle windshield, the current tube temperature T is the tube temperature and the air outlet temperature T is theAir outletPresence of TTemperature of the tube-TAir outlet<At 5 ℃, the air outlet temperature T is TAt room temperature+ A +1 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as a high wind gear, the current pipe temperature T is the pipe temperature and the air outlet temperature T is the temperatureAir outletPresence of TTemperature of the tube-TAir outlet<2 ℃ and at the moment, the air outlet temperature TAir outlet=TAt room temperature+ A +2 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued.
When the current room temperature is greater than or equal to a preset temperature threshold, the exit condition includes: when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fourth temperature value; when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fifth temperature value; when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a sixth temperature value; wherein the first wind gear is lower than the second wind gear and lower than the third wind gear; the first preset threshold is larger than the second preset threshold and is larger than the third preset threshold; the fourth temperature value is greater than the fifth temperature value and greater than the sixth temperature value. Wherein the first wind gear is lower than the second wind gear and lower than the third wind gear; for example, the first gear is a low gear, the second gear is a medium gear, and the third gear is a high gear. The first preset threshold is larger than the second preset threshold and is larger than the third preset threshold; for example, the first preset threshold is 8 ℃, the second preset threshold is 5 ℃, and the third preset threshold is 2 ℃. The first temperature value is less than the second temperature value and less than the third temperature value. For example, the fourth temperature value is B, the fifth temperature value is (B- Δ t1), and the sixth temperature value is (B- Δ t 2).
For example, the preset temperature threshold is 12 ℃, and the current room temperature TAt room temperature>12 ℃; when the user defines the windshield as a low wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<At 8 ℃, the air outlet temperature T is equal to T room temperature + B, if the conditions are met, the cold air prevention mode is exited, and if the conditions are not met, the current operation is continued; when the user defines the windshield as the middle windshield, the current tube temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<At 5 ℃, the air outlet temperature T isAir outlet=TAt room temperature+ B-1 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as a high wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<2 ℃ and at the moment, the air outlet temperature TAir outlet=TAt room temperatureAnd + B-2 ℃, if the conditions are met, the cold air prevention mode is exited, and if the conditions are not met, the current operation is continued.
In order to clearly illustrate the technical solution of the present invention, an implementation flow of the fan coil cold-proof control method provided by the present invention is described below with an embodiment.
Fig. 3 is a schematic method diagram of a fan coil cold-proof control method according to an embodiment of the present invention. As shown in fig. 3.
Detecting whether the target room temperature-the current room temperature is satisfied>If the temperature is 0 ℃, the somatosensory temperature difference exists, the heating mode is started, if not, the host computer is continuously in standby, and after the heating mode is started, whether T is met or not is detectedTemperature of the tube<And if the temperature is 35 ℃, entering a cold air prevention operation mode, otherwise, closing the cold air prevention operation mode, and detecting the current room temperature value after entering the cold air prevention operation mode.
Current room temperature TAt room temperature<At 12 ℃, when the user defines the windshield as a low wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outletAt the moment, the air outlet temperature T is less than 8 DEG CAir outlet=TAt room temperature+ A, receding if the above conditions are satisfiedThe cold air prevention mode is output, otherwise, the current operation is continued; when the user defines the windshield as the middle windshield, the current tube temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<At 5 ℃, the air outlet temperature T isAir outlet=TAt room temperature+ A +1 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as a high wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<2 ℃ and at the moment, the air outlet temperature TAir outlet=TAt room temperature+ A +2 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued.
Current room temperature T room temperature>At 12 ℃, when the user defines the windshield as a low wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<8 ℃, at the moment, the air outlet temperature TAir outlet=TAt room temperature+ B, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as the middle windshield, the current tube temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<At 5 ℃, the air outlet temperature T isAir outlet=TAt room temperature+ B-1 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as a high wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<2 ℃ and at the moment, the air outlet temperature TAir outlet=TAt room temperatureAnd + B-2 ℃, if the conditions are met, the cold air prevention mode is exited, and if the conditions are not met, the current operation is continued.
Fig. 4 is a schematic structural diagram of an embodiment of a fan coil cold air prevention control device provided by the present invention. As shown in fig. 4, the fan coil anti-cold air control device 100 includes an acquisition unit 110 and a control unit 120.
The obtaining unit 110 is configured to obtain a current room temperature of a room where the fan coil is located and a current set wind gear of the fan coil after the fan coil enters the cold air prevention operation mode.
Specifically, the set temperature of the fan coil (i.e., the preset target room temperature T) is detected when the main unit is in a standby stateTarget) Whether greater than the current room temperature tCurrent of the room in which it is located, i.e., whether T is satisfiedTarget-TAt present>0; if the set temperature of the fan coil is higher than the current room temperature of the room, the fact that the somatosensory temperature difference exists is indicated, and a heating mode is started; otherwise, the host computer is in standby state continuously; after a heating mode is started, whether the pipe temperature of the fan coil is smaller than a preset pipe temperature threshold value or not is detected, and if the pipe temperature of the fan coil is smaller than the preset pipe temperature threshold value, a cold air prevention operation mode is entered. For example, it is detected whether T is satisfiedTemperature of the tube<And 35 ℃, if so, entering a cold wind prevention operation mode, and if not, closing the cold wind prevention operation mode.
The fan coil temperature may comprise an average of temperatures at two or more different locations of the fan coil. For example, the average temperature of the upper, middle, and lower portions of the fan coil. The temperature value monitored by the existing water multi-connected system in the cold air prevention control process is mostly the temperature collected at a point at the middle part of the coil as a tube temperature judgment value, but the detected tube temperature value has deviation from an actual value under the double actions of the nonuniformity of the flow field in the air coil and the nonuniformity of the refrigerant in the tube, and the like.
After the fan coil enters the cold air prevention operation mode, the obtaining unit 110 obtains the current room temperature of the room where the fan coil is located and the current set wind gear of the fan coil. The current room temperature can be detected in real time through a temperature sensing probe installed at the return air inlet of the fan coil. The set wind gear is specifically a wind gear set by a user, and for example, the set wind gear comprises a high wind gear, a medium wind gear and/or a low wind gear.
The control unit 120 is configured to control whether the fan coil exits the cold-proof operation mode based on the current operating temperature and the set wind level.
Fig. 5 is a block diagram of a specific implementation of a control unit according to an embodiment of the invention. As shown in fig. 5, the control unit 120 includes a determination subunit 121, a judgment subunit 122, and a control subunit 123.
The determining subunit 121 is configured to determine, according to the current room temperature and the set wind level, an exit condition that the temperature of the fan coil and the air outlet temperature need to meet for exiting the cold-wind-proof operation mode. The judging subunit 122 is configured to judge whether the duct temperature and the outlet air temperature satisfy the exit condition; the control subunit 123 is configured to control the fan coil to exit the cold air prevention operation mode if the determining subunit determines that the exit condition is met.
Specifically, the air outlet temperature of the fan coil can be detected in real time through a temperature sensing probe installed at an air supply outlet of the fan coil. The fan coil temperature may comprise an average of temperatures at two or more different locations of the fan coil. For example, the average temperature of the upper, middle, and lower portions of the fan coil. The invention collects the average temperature value of more than two different parts of the heat exchange tube of the fan coil, and the obtained temperature value is more objective and reliable.
The exit conditions comprise temperature conditions required to be met by the difference between the pipe temperature and the outlet air temperature and temperature conditions required to be met by the difference between the outlet air temperature and the current room temperature under different room temperatures and different set wind gears. The judging subunit 122 judges whether the pipe temperature and the outlet air temperature satisfy the exit condition; if the determining subunit 122 determines that the quitting condition is met, the control subunit 123 controls the fan coil to quit the cold air prevention operation mode. If the determining subunit 122 determines that the exit condition is not satisfied, the current operation is continued, that is, the determining subunit 123 returns to continue determining whether the duct temperature and the outlet air temperature satisfy the exit condition.
More specifically, when the current room temperature is less than a preset temperature threshold, the exit condition includes: when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a first temperature value; when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a second temperature value; and when the set wind shield is a third wind shield, the difference value between the pipe temperature and the air outlet temperature is smaller than a third preset threshold value, and the difference value between the air outlet temperature and the current room temperature is larger than or equal to a third temperature value. Wherein the first wind gear is lower than the second wind gear and lower than the third wind gear; for example, the first gear is a low gear, the second gear is a medium gear, and the third gear is a high gear. The first preset threshold is larger than the second preset threshold and is larger than the third preset threshold; for example, the first preset threshold is 8 ℃, the second preset threshold is 5 ℃, and the third preset threshold is 2 ℃. The first temperature value is less than the second temperature value and less than the third temperature value. For example, the first temperature value is a, the second temperature value is (a + Δt1), and the third temperature value is (a + Δt 2).
For example, the preset temperature threshold is 12 ℃, and the current room temperature TAt room temperature<12 ℃; when the user defines the windshield as a low wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outletAt the moment, the air outlet temperature T is less than 8 DEG CAir outlet=TAt room temperature+ A, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as the middle windshield, the current tube temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<At 5 ℃, the air outlet temperature T isAir outlet=TAt room temperature+ A +1 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as a high wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletExistence of T tube temperature-TAir outlet<2 ℃ and at the moment, the air outlet temperature TAir outlet=TAt room temperature+ A +2 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued.
When the current room temperature is greater than or equal to a preset temperature threshold, the exit condition includes: when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fourth temperature value; when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fifth temperature value; when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a sixth temperature value; wherein the first wind gear is lower than the second wind gear and lower than the third wind gear; the first preset threshold is larger than the second preset threshold and is larger than the third preset threshold; the fourth temperature value is greater than the fifth temperature value and greater than the sixth temperature value. Wherein the first wind gear is lower than the second wind gear and lower than the third wind gear; for example, the first gear is a low gear, the second gear is a medium gear, and the third gear is a high gear. The first preset threshold is larger than the second preset threshold and is larger than the third preset threshold; for example, the first preset threshold is 8 ℃, the second preset threshold is 5 ℃, and the third preset threshold is 2 ℃. The first temperature value is less than the second temperature value and less than the third temperature value. For example, the fourth temperature value is B, the fifth temperature value is (B- Δ t1), and the sixth temperature value is (B- Δ t 2).
For example, the preset temperature threshold is 12 ℃, and the current room temperature TAt room temperature>12 ℃; when the user defines the windshield as a low wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<8 ℃, at the moment, the air outlet temperature TAir outlet=TAt room temperature+ B, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as the middle windshield, the current tube temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<At 5 ℃, the air outlet temperature T isAir outlet=TAt room temperature+ B-1 ℃, if the above conditions are met, the cold air prevention mode is exited, otherwise, the current operation is continued; when the user defines the windshield as a high wind gear, the current pipe temperature TTemperature of the tubeAnd the outlet air temperature TAir outletPresence of TTemperature of the tube-TAir outlet<2 ℃ and at the moment, the air outlet temperature TAir outlet=TAt room temperatureAnd + B-2 ℃, if the conditions are met, the cold air prevention mode is exited, and if the conditions are not met, the current operation is continued.
The invention also provides a storage medium corresponding to the fan coil cold-wind prevention control method, and a computer program is stored on the storage medium, and when the program is executed by a processor, the program realizes the steps of any one of the methods.
The invention also provides a water multi-connected air conditioning system corresponding to the fan coil cold air prevention control method, which comprises a processor, a memory and a computer program which is stored in the memory and can run on the processor, wherein the processor realizes the steps of any one of the methods when executing the program.
The invention also provides a water multi-connected air conditioning system corresponding to the fan coil cold air prevention control device, which comprises any one of the fan coil cold air prevention control devices.
Therefore, according to the scheme provided by the invention, after entering the cold wind prevention operation mode, whether the fan coil exits the cold wind prevention operation mode is controlled based on the current room temperature and the current set wind gear of the fan coil, the influence of the environment temperature and the set wind gear on cold wind prevention control is considered, the control strategy is reasonable, and whether the cold wind prevention coil exits or not is judged based on the difference value of the pipe temperature and the air outlet temperature and the difference value of the air outlet temperature and the current room temperature.
The temperature value monitored by the existing water multi-connected system in the cold air prevention control process is mostly the temperature collected at a point at the middle part of the coil as a tube temperature judgment value, but the detected tube temperature value is deviated from an actual value under the double action of the nonuniformity of the flow field in the air coil and the nonuniformity of the refrigerant in the tube, and the like.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (8)

1. A fan coil cold air prevention control method is characterized by comprising the following steps:
after the fan coil enters a cold air prevention operation mode, acquiring the current room temperature of a room where the fan coil is located and the current set wind gear of the fan coil;
controlling whether the fan coil exits the anti-cold wind operating mode based on the current room temperature and the set wind gear;
controlling whether the fan coil exits the anti-cold wind operating mode based on the current operating temperature and the set wind gear, including:
determining exit conditions, which are required to be met by the tube temperature and the air outlet temperature of the fan coil, for exiting the cold-wind-proof operation mode according to the current room temperature and the set wind gear;
judging whether the temperature of the pipe and the temperature of the outlet air meet the exit condition, and if so, controlling the fan coil to exit the cold air prevention operation mode;
the exit condition includes: and the difference between the pipe temperature and the air outlet temperature and the difference between the air outlet temperature and the current room temperature meet temperature conditions.
2. The method of claim 1,
when the current room temperature is less than a preset temperature threshold, the exit condition includes:
when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a first temperature value;
when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a second temperature value;
when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a third temperature value;
when the current room temperature is greater than or equal to a preset temperature threshold, the exit condition includes:
when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fourth temperature value;
when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fifth temperature value;
when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a sixth temperature value;
wherein the first wind gear is lower than the second wind gear and lower than the third wind gear;
the first preset threshold is larger than the second preset threshold and is larger than the third preset threshold;
the first temperature value is less than the second temperature value and less than the third temperature value;
the fourth temperature value is greater than the fifth temperature value and greater than the sixth temperature value.
3. The method of any of claims 1-2, wherein the fan coil tube temperature comprises: the average temperature value of more than two different parts of the fan coil.
4. A fan coil anti-cold air control device, comprising:
the acquiring unit is used for acquiring the current room temperature of a room where the fan coil is located and the current set wind gear of the fan coil after the fan coil enters a cold air prevention operation mode;
the control unit is used for controlling whether the fan coil exits the cold wind prevention operation mode or not based on the current room temperature and the set wind gear;
the control unit includes:
the determining subunit is used for determining an exit condition, which is required to be met by the temperature of the pipe of the fan coil and the air outlet temperature, for exiting the cold air preventing operation mode according to the current room temperature and the set wind gear;
the judging subunit is used for judging whether the temperature of the pipe and the temperature of the outlet air meet the exit condition;
the control subunit is used for controlling the fan coil to exit the cold air prevention operation mode if the judging subunit judges that the exit condition is met;
the exit condition includes: and the difference between the pipe temperature and the air outlet temperature and the difference between the air outlet temperature and the current room temperature meet temperature conditions.
5. The apparatus of claim 4,
when the current room temperature is less than a preset temperature threshold, the exit condition includes:
when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a first temperature value;
when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a second temperature value;
when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a third temperature value;
when the current room temperature is greater than or equal to a preset temperature threshold, the exit condition includes:
when the set wind shield is a first wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a first preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fourth temperature value;
when the set wind shield is a second wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a second preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a fifth temperature value;
when the set wind shield is a third wind shield, the difference value between the pipe temperature and the wind outlet temperature is smaller than a third preset threshold value, and the difference value between the wind outlet temperature and the current room temperature is larger than or equal to a sixth temperature value;
wherein the first wind gear is lower than the second wind gear and lower than the third wind gear;
the first preset threshold is larger than the second preset threshold and is larger than the third preset threshold;
the first temperature value is less than the second temperature value and less than the third temperature value;
the fourth temperature value is greater than the fifth temperature value and greater than the sixth temperature value.
6. The device of any one of claims 4-5, wherein the fan coil tube temperature comprises: the average temperature value of more than two different parts of the fan coil.
7. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 3.
8. A water multi-connected air conditioning system comprising a processor, a memory and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to perform the steps of the method of any one of claims 1 to 3, and wherein the fan coil anti-cold air control device of any one of claims 4 to 6 is included.
CN201911223165.4A 2019-12-03 2019-12-03 Fan coil cold-wind-proof control method and device, medium and water multi-connected air conditioning system Active CN111076382B (en)

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