CN114234369B - Multi-split system, operation control method, operation control device and storage medium thereof - Google Patents

Multi-split system, operation control method, operation control device and storage medium thereof Download PDF

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Publication number
CN114234369B
CN114234369B CN202111520252.3A CN202111520252A CN114234369B CN 114234369 B CN114234369 B CN 114234369B CN 202111520252 A CN202111520252 A CN 202111520252A CN 114234369 B CN114234369 B CN 114234369B
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water
water tank
preset
operation control
liquid level
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CN114234369A (en
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张仲秋
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GD Midea Air Conditioning Equipment Co Ltd
Midea Group Wuhan HVAC Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
Midea Group Wuhan HVAC Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The embodiment of the application provides a multi-split system and an operation control method, an operation control device and a storage medium thereof, wherein the multi-split system comprises an evaporator, a water tank for storing condensed water generated by the evaporator and a subcooler connected with the evaporator, the subcooler is positioned in the water tank, and the water tank is provided with a water pump for controlling the liquid level; the operation control method of the multi-split system comprises the following steps: acquiring the refrigerating capacity demand and the indoor air humidity; and controlling the operation of the water pump according to the refrigerating capacity requirement and the indoor air humidity so as to control the liquid level of the condensed water in the water tank. This application embodiment controls the operation of water pump through refrigerating capacity demand and indoor air humidity to control the water level of condensate water in the water tank, utilize the condensate water refrigeration in the water tank according to the refrigeration demand, when guaranteeing system's refrigerating output, improving refrigeration performance, can reduce the consumption to the energy.

Description

Multi-split system, operation control method, operation control device and storage medium thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioner system, an operation control method, an operation control device and a storage medium thereof.
Background
At present, a multi-split subcooler divides a refrigerant passing through a condenser, and a flow dividing back plate exchanges heat with a main pipeline refrigerant.
However, this method may lose the amount of refrigerant in the main line, increase the energy consumption of the system, and reduce the cooling performance of the air conditioner.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a multi-split air conditioner system, an operation control method, an operation control device and a storage medium thereof, which can adjust the water level of a water tank according to the refrigerating capacity requirement and the indoor air humidity, save the energy consumption and improve the refrigerating performance of the air conditioner.
According to the operation control method of the multi-split system in the embodiment of the first aspect of the application, the multi-split system comprises an evaporator, a water tank and a subcooler, wherein the water tank is used for storing condensed water generated by the evaporator, the subcooler is connected with the evaporator and is positioned inside the water tank, and the water tank is provided with a water pump used for controlling liquid level;
the operation control method of the multi-split system comprises the following steps:
acquiring the refrigerating capacity demand and the indoor air humidity;
and controlling the operation of the water pump according to the refrigerating capacity requirement and the indoor air humidity so as to control the liquid level of the condensed water in the water tank.
According to the operation control method of the multi-split system in the embodiment of the first aspect of the application, at least the following beneficial effects are achieved: the water pump is controlled to operate through refrigerating capacity requirements and indoor air humidity, so that the water level of condensed water in the water tank is controlled, the condensed water in the water tank is utilized for refrigerating according to refrigerating requirements, the refrigerating capacity of the system is guaranteed, the refrigerating performance is improved, and meanwhile, the consumption of energy sources can be reduced.
According to some embodiments of the present application, when the cooling capacity demand is greater than a first preset capacity demand, or when the cooling capacity demand is less than a second preset capacity demand and the indoor air humidity is greater than a first preset humidity: controlling the water pump to stop working until the water tank is filled with the condensed water; wherein the first preset capacity requirement is greater than the second preset capacity requirement.
According to some embodiments of the present application, when the cooling capacity demand is less than the second preset capacity demand and the indoor air humidity is less than a second preset humidity: controlling the water pump to be started to discharge the condensed water in the water tank; wherein the first preset humidity is greater than the second preset humidity.
According to some embodiments of the application, when the cooling capacity demand is greater than the second preset capacity demand and the cooling capacity demand is less than the first preset capacity demand, or, when the cooling capacity demand is less than the second preset capacity demand and the indoor air humidity is between the second preset humidity and the first preset humidity: and controlling the operation of the water pump according to the control mode at the last moment.
According to some embodiments of the present application, the set value of the second preset humidity in the cooling mode is greater than the second preset humidity value in the dehumidification mode.
According to some embodiments of the application, the water tank is provided with a level sensor for detecting a level of the liquid, when the level sensor detects that the liquid level of the water tank is full, the water pump is controlled to operate to discharge unnecessary condensed water.
According to some embodiments of the application, further comprising: acquiring the water inlet temperature and the water outlet temperature of the water tank; and when the difference value between the water inlet temperature and the water outlet temperature is smaller than a preset temperature difference value, controlling the water pump to work so as to reduce the amount of condensed water in the water tank.
According to a multi-split system of this application second aspect embodiment, including controller, evaporimeter, be used for the storage the water tank of the comdenstion water that the evaporimeter produced and with the subcooler that the evaporimeter is connected, the subcooler is located inside the water tank, the water tank is provided with the water pump that is used for controlling the liquid level, the controller is used for:
acquiring the refrigerating capacity demand and the indoor air humidity;
and controlling the operation of the water pump according to the refrigerating capacity requirement and the indoor air humidity so as to control the liquid level of the condensed water in the water tank.
The multi-split system according to the embodiment of the second aspect of the present application has at least the following advantages: the controller controls the operation of the water pump according to the refrigerating capacity requirement and the indoor air humidity, so that the water level of condensed water in the water tank is controlled, corresponding condensed water is provided according to the refrigerating requirement, and the requirement on energy can be reduced while the supercooling degree of the system is improved; in addition, the condensate water which is originally discharged by the evaporator is recycled, and the waste of energy is reduced.
According to some embodiments of the present application, the water tank is provided with a liquid level sensor for detecting a liquid level height; the controller is also used for controlling the water pump to work to discharge redundant condensed water under the condition that the liquid level of the water tank is detected to be full.
According to some embodiments of the present application, the water tank is further provided with a self-draining water pipe, and a drain valve is provided on the self-draining water pipe; the top of the water tank is also provided with a pressure valve.
An operation control apparatus according to an embodiment of a third aspect of the present application includes at least one control processor and a memory for communicative connection with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor to enable the at least one control processor to execute the operation control method of the multi-split system according to the embodiment of the first aspect of the present application.
A multi-split system according to an embodiment of a fourth aspect of the present application includes the operation control device according to the embodiment of the third aspect of the present application.
In an embodiment of the fifth aspect of the present application, the computer-readable storage medium stores computer-executable instructions for causing a computer to execute the operation control method of the multi-split system as in the embodiment of the first aspect of the present application.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The present application is further described with reference to the following figures and examples, in which:
fig. 1 is a schematic flow chart of an operation control method of a multi-split system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a multi-split system according to an embodiment of the present application;
FIG. 3 is a schematic flowchart of step S200 in FIG. 1;
FIG. 4 is a schematic view of another specific flowchart of step S200 in FIG. 1;
FIG. 5 is a schematic view of another specific flowchart of step S200 in FIG. 1;
fig. 6 is a schematic view of another structure of a multi-split system according to an embodiment of the present application;
fig. 7 is a flowchart illustrating an operation control method of a multi-split system according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an operation control device according to an embodiment of the present application.
Reference numerals:
the system comprises an evaporator 100, a water tank 200, a subcooler 300, a water pump 400, a liquid level sensor 500, a controller 600, a self-draining water pipe 700, a blow-down valve 800, a pressure valve 900, a first temperature sensor 1000, a second temperature sensor 1100, an operation control device 1200, a control processor 1210 and a memory 1220.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. 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 application.
Those skilled in the art will appreciate that the embodiments shown in fig. 1, 2, 3, etc. do not constitute limitations on the embodiments of the disclosure, and may include more or less steps than those shown, or some steps in combination, or different steps.
The device embodiments described below are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, and functional modules/units in the devices disclosed hereinafter may be implemented as software, firmware, hardware, and suitable combinations thereof.
The terms "first," "second," "third," "fourth," and the like in the description and in the drawings of this application 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 application 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.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
An operation control method of a multi-split system according to an embodiment of the present application is described below with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the multi-split system includes an evaporator 100, a water tank 200 for storing condensed water generated from the evaporator 100, and a subcooler 300 connected to the evaporator 100, the subcooler 300 being located inside the water tank 200, the water tank 200 being provided with a water pump 400 for controlling a liquid level.
The operation control method of the multi-split air conditioning system comprises the following steps of:
step S100: acquiring the refrigerating capacity demand and the indoor air humidity;
step S200: and controlling the operation of the water pump according to the refrigerating capacity requirement and the indoor air humidity so as to control the liquid level of the condensed water in the water tank.
Specifically, as shown in fig. 2, the multi-split system is composed of an evaporator 100, a water tank 200, a subcooler 300, and a water pump 400. The evaporator 100 generates a large amount of condensed water while refrigerating, and the condensed water is introduced into the water tank 200 from the bottom of the water tank 200 through a pipe. A subcooler 300 is provided inside the water tank 200, and the subcooler 300 and the evaporator 100 are connected by a pipe. The condensed water generated by the evaporator 100 enters the water tank 200 through a pipe and cools the subcooler 300 inside the water tank 200, thereby achieving the purpose of improving the supercooling degree of the refrigerant. Wherein, the condensed water enters the water tank 200 from the bottom of the water tank 200, and the cooling effect on the subcooler 300 can be enhanced. The water pump 400 is further disposed on the sidewall of the water tank 200, and the water pump 400 can control the liquid level of the water tank 200.
As shown in fig. 3, the multi-split system acquires a cooling capacity demand set by a user and an indoor air humidity at the present time, and controls the operation of the water pump 400 according to the cooling capacity demand and the indoor air humidity, thereby controlling a liquid level height of condensed water in the water tank 200. The water pump 400 is turned on or off as required to control the liquid level height of the water tank 200, and when the water pump 400 is turned off, condensed water cannot be discharged, so that the liquid level height of the water tank 200 can be increased; when the water pump 400 is turned on, the condensation is discharged, thereby lowering the liquid level height of the water tank 200.
According to the operation control method of the multi-split air conditioning system, the operation of the water pump 400 is controlled according to the refrigerating capacity requirement and the indoor air humidity, so that the liquid level height of the condensed water in the water tank 200 is changed. Corresponding condensed water is provided according to refrigeration requirements, the refrigeration capacity of the system is ensured, meanwhile, the energy consumption can be reduced,
in some embodiments of the present application, as shown in fig. 3, step S200: controlling operation of the water pump to control the level of condensate in the tank based on the cooling capacity requirement and the indoor air humidity, including but not limited to the steps of:
step S210: when the refrigerating capacity demand is greater than a first preset capacity demand, or when the refrigerating capacity demand is less than a second preset capacity demand and the indoor air humidity is greater than a first preset humidity;
step S220: and controlling the water pump to stop working until the water tank is filled with the condensed water.
Specifically, a first preset capacity requirement, a second preset capacity requirement and a first preset humidity are preset, wherein the value set by the first preset capacity requirement is greater than the value set by the second preset capacity requirement. When the current refrigerating capacity requirement is greater than the first preset capacity requirement, it is indicated that the refrigerating capacity provided by the subcooler 300 in the multi-split air-conditioning system cannot meet the current refrigerating capacity requirement, and other ways are needed to increase the refrigerating capacity, therefore, the water pump 400 is controlled to stop working, so that the condensed water generated by the evaporator 100 enters the water tank 200, the water tank 200 is kept in a full state, and the condensed water in the water tank 200 cools the subcooler 300 to increase the refrigerating capacity of the multi-split air-conditioning system, thereby reducing the temperature. The water tank 200 is maintained in a full state until a maximum level trigger signal indicating a maximum safe water level of the water tank 200 is received, and then the water pump 400 is controlled to operate to drain the excessive condensed water.
When the numerical value of the refrigerating capacity requirement is smaller than the numerical value of the first preset capacity requirement and the numerical value of the indoor air humidity is larger than the numerical value of the first preset humidity, the refrigerating capacity requirement can meet the current refrigerating capacity requirement, but the refrigerating capacity required during refrigerating is larger due to overlarge indoor air humidity, so that the water pump 400 needs to be controlled to stop working, the condensed water generated by the evaporator 100 enters the water tank 200, and the water tank 200 is kept in a full state, so that the refrigerating capacity of the multi-split air system is improved. The condensate water in the water tank 200 can cool the subcooler 300, so that the refrigerating capacity of the multi-split air-conditioning system is improved, and the requirement on refrigerating capacity at high air humidity is met. When the maximum liquid level trigger signal is received, the water pump 400 is controlled to start to operate, so that the excessive condensed water in the water tank 200 is drained.
In some embodiments of the present application, as shown in fig. 4, step S200: controlling the operation of the water pump to control the level of condensate in the water tank based on the cooling capacity requirement and the indoor air humidity, includes, but is not limited to, the steps of:
step S230: when the refrigerating capacity requirement is smaller than a second preset capacity requirement and the indoor air humidity is smaller than a second preset humidity;
step S240: and controlling the water pump to be started to discharge the condensed water in the water tank.
Specifically, a second preset humidity is preset, wherein the value of the second preset humidity is smaller than the value of the first preset humidity. When the set cooling capacity demand is less than the second preset capacity demand and the indoor air humidity is less than the preset second preset humidity, the water pump 400 is turned on, thereby draining the condensed water in the water tank 200. The refrigerating capacity demand is less than the second and preset the capacity demand and shows that the refrigerating capacity of the current multi-split system can satisfy the refrigerating demand, and indoor air humidity is lower, and air humidity can not increase the consumption of refrigerating flow, need not to increase extra refrigerating capacity again and cools down subcooler 300, consequently, opens water pump 400 and makes the inside comdenstion water of water tank 200 all discharge, and water tank 200 is inside to keep anhydrous state. The refrigeration requirement is met, and meanwhile, new energy consumption is not increased.
In some embodiments of the present application, as shown in fig. 5, step S200: controlling operation of the water pump to control the level of condensate in the tank based on the cooling capacity requirement and the indoor air humidity, including but not limited to the steps of:
step S250: when the refrigerating capacity demand is greater than the second preset capacity demand and the refrigerating capacity demand is less than the first preset capacity demand, or when the refrigerating capacity demand is less than the second preset capacity demand and the indoor air humidity is between the second preset humidity and the first preset humidity;
step S260: and controlling the operation of the water pump according to the control mode at the last moment.
Specifically, a refrigerating capacity demand and an indoor air humidity value are acquired, and numerical values of a first preset capacity demand, a second preset capacity demand, a first preset humidity and a second preset humidity are preset.
When the refrigerating capacity demand is between the second preset capacity demand and the first preset capacity demand, the operating state of the water pump 400 is controlled according to the control mode of the water level of the water tank 200 at the previous moment without acquiring the humidity of the indoor air, wherein the first preset capacity demand is greater than the second preset capacity demand. For example, the refrigeration capacity requirement is acquired, the refrigeration capacity requirement is judged and compared with a first preset capacity requirement and a second preset capacity requirement, and if the refrigeration capacity requirement is between the second preset capacity requirement and the first preset capacity requirement, the indoor air humidity does not need to be acquired, but the operation state of the water pump 400 at the previous time is acquired. If the operation state of the water pump 400 is stopped at the previous moment, stopping the operation of the water pump 400, allowing the condensed water generated by the evaporator 100 to enter the water tank 200, and keeping the water tank 200 in a full state until the water level of the condensed water reaches the highest safe water level of the water tank 200, starting the water pump 400 to remove the excessive condensed water, so that the water tank 200 is kept in a full state; if the operation state of the water pump 400 is the on operation at the previous time, the water pump 400 is turned on to discharge all the condensed water inside the water tank 200, so that the inside of the water tank 200 is maintained in a water-free state. If the refrigerating capacity requirement is greater than the second preset capacity requirement, or the refrigerating capacity requirement is less than the first preset capacity requirement, the indoor air humidity needs to be acquired, and then the operation of the water pump 400 is controlled according to the comparison result of the indoor air humidity with the first preset humidity and the second preset humidity.
When the refrigerating capacity requirement is smaller than a preset second preset capacity requirement, the indoor air humidity is larger than a second preset humidity, and the indoor air humidity is smaller than a first preset humidity, the running state of the water pump 400 at the last moment is obtained, and the running state of the water pump 400 at the current moment is controlled according to the running state of the water pump 400 at the last moment. For example, the cooling capacity demand is acquired, the cooling capacity demand is judged and compared with a first preset capacity demand and a second preset capacity demand, if the cooling capacity demand is smaller than a second preset capacity demand, the indoor air humidity is acquired, and the indoor air humidity is compared with the first preset humidity and the second preset humidity. If the indoor air humidity is between the second preset humidity and the first preset humidity, the operation state of the water pump 400 at the previous time is acquired. If the operation state of the water pump 400 is stopped at the previous moment, stopping the operation of the water pump 400, so that the condensed water generated by the evaporator 100 enters the water tank 200 from the bottom of the water tank 200, keeping the water tank 200 in a full state until the water level of the condensed water reaches the highest safe water level of the water tank 200, and starting the water pump 400 to drain the excessive condensed water so as to keep the water tank 200 in a full state; if the operation state of the water pump 400 is the on operation at the previous time, the water pump 400 is turned on to discharge all the condensed water inside the water tank 200, so that the inside of the water tank 200 is maintained in a water-free state.
In other embodiments, the set point of the second preset humidity in the cooling mode is greater than the second preset humidity value in the dehumidification mode.
Specifically, the operation modes of the multi-split air conditioning system include a cooling mode capable of reducing the indoor air temperature and a dehumidifying mode capable of reducing the indoor humidity while reducing the indoor air temperature. And in different working modes, the preset values of the second preset humidity are different, and the second preset humidity is smaller than the second preset humidity in the dehumidification mode in the refrigeration mode. In operation, the refrigerating capacity demand and the indoor air humidity are acquired, the refrigerating capacity demand is compared with the first preset capacity demand and the second preset capacity demand, the indoor air humidity is compared with the first preset humidity and the second preset humidity, and the operation state of the water pump 400 is controlled according to the comparison result, so that the water level of the condensed water in the water tank 200 is adjusted. The operation of the water pump 400 is controlled through the difference between the refrigerating capacity requirement and the indoor air humidity in different working modes, so that the refrigerating reliability of the multi-split air conditioner system can be improved while the refrigerating capacity of the multi-split air conditioner system is improved.
For example, in the cooling mode, the first preset capacity demand is set to 80%, the second preset capacity demand is set to 30%, the first preset humidity is set to 70%, and the second preset humidity is set to 60%. When the refrigerating capacity requirement is less than or equal to 30% and the indoor air humidity is greater than or equal to 70%, or when the refrigerating capacity requirement is greater than or equal to 80%, the refrigerating capacity provided by the subcooler 300 in the multi-split air-conditioning system cannot meet the current refrigerating capacity requirement, so that the water pump 400 is controlled to stop working, the condensed water generated by the evaporator 100 enters the water tank 200 through a pipeline, and the condensed water can cool the subcooler 300 in the water tank 200, so that the refrigerating capacity of the multi-split air-conditioning system is improved, and the refrigerating requirement is met. When the refrigerating capacity requirement is less than or equal to 30% and the indoor air humidity is less than or equal to 60%, the refrigerating capacity provided by the subcooler 300 in the multi-split air-conditioning system can meet the refrigerating requirement without increasing additional refrigerating capacity, so that the water pump 400 is controlled to work, and all the condensed water in the water tank 200 is discharged. When the refrigeration capacity demand is less than or equal to 30% and the indoor air humidity is between 60% and 70%, or when the refrigeration capacity demand is between 30% and 80%, the working state of the water pump 400 at the previous time is acquired, and the current working state of the water pump 400 is controlled according to the working state of the water pump 400 at the previous time.
In the dehumidification mode, the first preset capacity demand is set to 80%, the second preset capacity demand is set to 30%, the first preset humidity is set to 70%, and the second preset humidity is set to 40%. The specific control method of the water pump 400 is the same as that in the cooling mode, and is not described herein again.
It can be understood that, in different working modes, the specific values of the first preset capacity requirement, the second preset capacity requirement, the first preset humidity and the second preset humidity can be adjusted and set according to actual requirements.
In some embodiments of the present application, as shown in fig. 6, the multi-split system further includes a liquid level sensor 500, and the liquid level sensor 500 is disposed inside the water tank 200 and is capable of detecting a liquid level height of the condensed water in the water tank 200. When the liquid level sensor 500 detects that the liquid level of the water tank 200 has reached the maximum level, the water pump 400 is controlled to operate, thereby removing the excessive condensed water from the water tank 200.
Specifically, the liquid level sensor 500 is disposed inside the water tank 200, and can monitor the liquid level height of the condensed water in the water tank 200 in real time. When the refrigerating capacity provided by the subcooler 300 cannot meet the current refrigerating capacity requirement, the water pump 400 is turned off, so that the condensed water generated by the evaporator 100 enters the water tank 200 from the bottom of the water tank 200 to cool the subcooler 300, thereby improving the refrigerating capacity of the multi-split air-conditioning system. Along with the increase of the condensed water, the water level of the water tank 200 will continuously rise, when the liquid level sensor 500 detects that the water tank 200 is full, that is, the highest water level of the water tank 200 is reached, the water pump 400 is started to discharge the redundant condensed water, so that the normal operation of the multi-split air conditioning system can be ensured while the water tank 200 is kept full of water. The water level of the water tank 200 can be monitored in real time by arranging the liquid level sensor 500, and after the water level reaches the highest water level, the water pump 400 is controlled to remove redundant condensate water, so that the automatic control of the system is realized, and the system damage caused by the overhigh water level of the water tank 200 is avoided.
In some embodiments of the present application, as shown in fig. 7, the operation control method of the multi-split system further includes, but is not limited to, the following steps:
step S300: acquiring the water inlet temperature and the water outlet temperature of a water tank;
step S400: and when the difference value between the inlet water temperature and the outlet water temperature is smaller than the preset temperature difference value, controlling the water pump to work so as to reduce the amount of condensed water in the water tank.
Specifically, the condensed water generated by the evaporator 100 enters the water tank 200 from the bottom of the water tank 200 through the water pipe, leaves the water tank 200 from the top of the water tank 200, and obtains the temperature of the inlet water of the condensed water into the water tank 200 and the temperature of the outlet water of the condensed water from the cover of the water tank 200. The difference between the inlet water temperature and the outlet water temperature is compared with a preset temperature difference, and the working state of the water pump 400 is controlled according to the comparison result. If the difference between the inlet water temperature and the outlet water temperature is less than the preset temperature difference, the water pump 400 is turned on to drain the condensed water, thereby reducing the amount of the condensed water in the water tank 200.
For example, the preset temperature difference includes a first preset temperature difference and a second preset temperature difference, the first preset temperature difference is smaller than the second preset temperature difference, the first preset temperature difference is set to be 2 ℃, and the second preset temperature difference is set to be 3 ℃. The first preset temperature difference value and the second preset temperature difference value can be set to be any values in the range of 0-5 ℃.
When the difference between the inlet temperature difference and the outlet temperature difference is greater than 3 ℃, it indicates that the condensate water generated by the evaporator 100 can also cool the subcooler 300, and therefore, the water pump 400 is turned off. After the water pump 400 is turned off, the condensed water in the water tank 200 is continuously increased until the liquid level sensor 500 detects the highest liquid level trigger signal, that is, the water level of the water tank 200 reaches the highest water level, the water pump 400 is turned on again, and the redundant condensed water is discharged. When the difference between the inlet temperature difference and the outlet temperature difference is less than 2 ℃, it indicates that the condensed water generated by the evaporator 100 cannot provide enough cooling capacity to meet the refrigeration requirement of the multi-split system, and therefore the water pump 400 needs to be started to discharge the original condensed water in the water tank 200. In the present embodiment, the water pump 400 is operated every 40 seconds. And when the temperature difference between the inlet water and the outlet water is between 2 and 3 ℃, acquiring the running state of the water pump 400 at the previous moment and controlling the water pump 400 to run according to the running state of the water pump 400 at the previous moment. Wherein the operation rate of the water pump 400 is related to the volume V of the water tank 200, the time for which the water pump 400 is operated once is M seconds, and the amount V of water discharged 1 Then the number of times that the water pump 400 is operated together N = V/V 1 That is, after the water pump 400 is operated N times, the condensed water in the water tank 200 can be drained.
The present application also provides a multi-split system, as shown in fig. 6, the multi-split system is composed of a controller 600, an evaporator 100, a water tank 200, an evaporator 100, and a water pump 400. The evaporator 100 produces a large amount of condensed water while refrigerating, and the condensed water is introduced into the water tank 200 from the bottom of the water tank 200 through a pipe. A subcooler 300 is provided inside the water tank 200, and the subcooler 300 and the evaporator 100 are connected by a pipe. The condensed water generated by the evaporator 100 enters the water tank 200 through a pipe and cools the subcooler 300 inside the water tank 200, thereby achieving the purpose of improving the supercooling degree of the refrigerant. The water pump 400 is further disposed on the sidewall of the water tank 200, and the controller 600 obtains and controls the operation of the water pump 400 according to the cooling capacity demand and the indoor air humidity, so as to change the water level of the condensed water in the water tank 200. It is understood that the subcooler 300 may be replaced with other heat exchangers such as plate heat exchangers, coil heat exchangers, etc.
In other embodiments, the condensed water generated by the evaporator 100 may be input to a main board, a driving board, etc. to dissipate heat, in addition to being input to the water tank 200 to cool the subcooler 300 inside the water tank 200. The water tank 200 may further include an electric heater, and when the multi-split air conditioning system operates in winter, the super-cooled air may be heated in advance, so that the frosting of the external unit of the multi-split air conditioning system may be improved. In addition, a heat exchange liquid or a heat exchange material may be further placed in the water tank 200, and the condensed water generated from the evaporator 100 may indirectly exchange heat with the subcooler 300 by exchanging heat with the heat exchange material.
According to the multi-split system of the embodiment of the application, the condensate water generated by the evaporator 100 is cooled by the subcooler 300, so that the refrigerating capacity of the multi-split system is improved, and the energy of the system is saved. Meanwhile, the processor controls the operation of the water pump 400 according to the refrigerating capacity requirement and the indoor air humidity, so that the refrigerating capacity of the multi-split system can be improved.
In some embodiments of the present application, as shown in fig. 6, the multi-split system further includes a liquid level sensor 500, and the liquid level sensor 500 is disposed inside the water tank 200 and is capable of detecting a liquid level height of the condensed water in the water tank 200. When the liquid level sensor 500 detects that the liquid level of the water tank 200 is full, the controller 600 controls the water pump 400 to operate, thereby removing the excessive condensed water from the water tank 200.
Specifically, the liquid level sensor 500 is disposed inside the water tank 200, and can monitor the liquid level height of the condensed water in the water tank 200 in real time. When the cooling capacity provided by the subcooler 300 cannot meet the current cooling capacity requirement, the water pump 400 is in a closed state, so that the condensed water generated by the evaporator 100 enters the water tank 200 from the bottom of the water tank 200 to cool the subcooler 300, thereby improving the cooling capacity of the multi-split air-conditioning system. Along with the increase of the condensed water, the water level of the water tank 200 will continuously rise, when the liquid level sensor 500 detects that the water tank 200 is full, that is, the highest water level of the water tank 200 is reached, the controller 600 starts the water pump 400, so that the redundant condensed water is discharged, and the normal operation of the multi-split air-conditioning system can be ensured while the water tank 200 is kept full of water. The water level of the water tank 200 can be monitored in real time by arranging the liquid level sensor 500, and after the water level reaches the highest water level, the processor controls the water pump 400 to remove redundant condensate water, so that the automatic control of the system is realized, and the damage of the system caused by the overhigh water level of the water tank 200 is avoided.
In some embodiments of the present application, as shown in fig. 6, a self-draining water pipe 700 is provided on the water tank 200, a drain valve 800 is provided on the self-draining water pipe 700, and a pressure valve 900 is further provided on the top of the water tank 200. Wherein, the user can clean and maintain the water tank 200 through the blowoff valve 800, thereby being capable of prolonging the service life of the multi-split air-conditioning system. The pressure valve 900 is disposed at the top of the water tank 200, and can prevent the risk of explosion caused by the increase of the pressure in the water tank 200 due to the increase of the temperature of the condensed water in the water tank 200 after the self-draining water pipe 700 is blocked. The water tank 200 is further provided with a first temperature sensor 1000 and a second temperature sensor 1100, the first temperature sensor 1000 is disposed at the bottom of the water tank 200 for detecting the temperature of the inlet water of the water tank 200, and the second temperature sensor 1100 is disposed at the top of the water tank 200 for detecting the temperature of the outlet water of the water tank 200. The controller 600 controls the operating state of the water pump 400 according to the water inlet temperature and the water outlet temperature, thereby adjusting the amount of the condensed water in the water tank 200.
In addition, referring to fig. 8, the present application also provides an operation control apparatus 1200, comprising at least one control processor 1210 and a memory 1220 for communication connection with the at least one control processor 1210; the memory 1220 stores instructions executable by the at least one control processor 1210, and the instructions are executed by the at least one control processor 1210 to enable the at least one control processor 1210 to perform the operation control method of the multi-split system in any of the above embodiments.
The control processor 1210 and memory 1220 may be connected by a bus or other means.
The memory 1220, which is a non-transitory computer-readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer-executable programs. Further, the memory 1220 can include high-speed random access memory, and can also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 1220 optionally includes memory 1220 located remotely from the control processor 1210, and these remote memories may be connected to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The present application also provides a multi-split system, which includes the operation control device 1200 in the above embodiment of the present application.
The present application also provides a computer-readable storage medium storing computer-executable instructions for causing a computer to execute the operation control method of the multi-online system in any of the above embodiments of the present application.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those skilled in the art.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims (12)

1. The operation control method of the multi-split air conditioning system is characterized in that the multi-split air conditioning system comprises an evaporator, a water tank and a subcooler, wherein the water tank is used for storing condensed water generated by the evaporator, the subcooler is connected with the evaporator, the subcooler is positioned in the water tank, and the water tank is provided with a water pump used for controlling the liquid level;
the operation control method of the multi-split system comprises the following steps:
acquiring the refrigerating capacity demand and the indoor air humidity;
controlling the operation of the water pump according to the refrigeration capacity requirement and the indoor air humidity so as to control the liquid level of the condensed water in the water tank;
wherein:
when the cooling capacity demand is greater than a first preset capacity demand, or, when the cooling capacity demand is less than a second preset capacity demand and the indoor air humidity is greater than a first preset humidity:
controlling the water pump to stop working until the water tank is filled with the condensed water;
wherein the first preset capacity requirement is greater than the second preset capacity requirement.
2. The operation control method of a multi-split system as set forth in claim 1, wherein when the cooling capacity demand is less than the second preset capacity demand and the indoor air humidity is less than a second preset humidity:
controlling the water pump to be started to discharge the condensed water in the water tank;
wherein the first preset humidity is greater than the second preset humidity.
3. The operation control method of a multi-split system as claimed in claim 2, wherein when the cooling capacity demand is greater than the second preset capacity demand and the cooling capacity demand is less than the first preset capacity demand, or when the cooling capacity demand is less than the second preset capacity demand and the indoor air humidity is between the second preset humidity and the first preset humidity:
and controlling the operation of the water pump according to the control mode at the last moment.
4. The operation control method of a multi-split system as claimed in claim 2, wherein the set value of the second preset humidity in the cooling mode is greater than the second preset humidity value in the dehumidifying mode.
5. The operation control method of a multi-split air conditioning system as claimed in claim 1, wherein the water tank is provided with a liquid level sensor for detecting a liquid level height, and when the liquid level sensor detects that the liquid level of the water tank is full, the water pump is controlled to operate to discharge excessive condensed water.
6. The operation control method of a multi-split system as set forth in claim 1, further comprising:
acquiring the water inlet temperature and the water outlet temperature of the water tank;
and when the difference value between the water inlet temperature and the water outlet temperature is smaller than a preset temperature difference value, controlling the water pump to work so as to reduce the amount of condensed water in the water tank.
7. A multi-split system comprising a controller, an evaporator, a water tank for storing condensed water generated from the evaporator, and a subcooler connected to the evaporator, the subcooler being located inside the water tank, the water tank being provided with a water pump for controlling a liquid level, the controller being configured to perform the operation control method according to any one of claims 1 to 6.
8. A multi-split system as claimed in claim 7, wherein the water tank is provided with a liquid level sensor for detecting a liquid level height; the controller is also used for controlling the water pump to work to discharge redundant condensed water under the condition that the liquid level of the water tank is detected to be full.
9. The multi-online system as claimed in claim 7, wherein the water tank is further provided with a self-draining water pipe, and a drain valve is provided on the self-draining water pipe; the top of the water tank is also provided with a pressure valve.
10. An operation control device comprising at least one control processor and a memory for communicative connection with the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform an operation control method of a multi-split air-conditioning system as set forth in any one of claims 1 to 6.
11. A multi-split system characterized by comprising the operation control device as recited in claim 10.
12. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the operation control method of a multi-split system as set forth in any one of claims 1 to 6.
CN202111520252.3A 2021-12-13 2021-12-13 Multi-split system, operation control method, operation control device and storage medium thereof Active CN114234369B (en)

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JP2005055107A (en) * 2003-08-06 2005-03-03 Matsushita Electric Ind Co Ltd Drain pump controller
CN101162119A (en) * 2006-10-10 2008-04-16 杨舰辉 Energy-saving method and device for refrigeration system
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CN205332411U (en) * 2016-01-04 2016-06-22 芜湖美智空调设备有限公司 Air -conditioner
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