CN111397104B - Control method and device of air conditioning system, control equipment, medium and air conditioning system - Google Patents
Control method and device of air conditioning system, control equipment, medium and air conditioning system Download PDFInfo
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- CN111397104B CN111397104B CN202010212060.5A CN202010212060A CN111397104B CN 111397104 B CN111397104 B CN 111397104B CN 202010212060 A CN202010212060 A CN 202010212060A CN 111397104 B CN111397104 B CN 111397104B
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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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a control method, a control device, a medium and an air conditioning system of the air conditioning system, wherein the method comprises the following steps: acquiring the current temperature difference of the current connecting pipe; determining a relative relationship between the current temperature difference and a reference temperature difference; controlling the electronic expansion valve to work under the condition that the electronic expansion valve is adjusted from the reference opening degree to the target opening degree according to the relative relation; the current temperature difference is an absolute value of a difference value between the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe. According to the control method, the control device, the control equipment, the medium and the air conditioning system, the electronic expansion valve is controlled to work under the condition that the electronic expansion valve is adjusted to the target opening degree from the reference opening degree according to the relative relation between the current temperature difference and the reference temperature difference, so that the opening degree of the electronic expansion valve meets the requirement of the current connecting pipe length, the medium flow in the evaporator with the current connecting pipe length is ensured to be proper, the energy efficiency of the evaporator is fully exerted, and the energy efficiency of the whole machine is fully exerted.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method, a control device, control equipment, a medium and an air conditioning system of the air conditioning system.
Background
In a two-stage compression system, the enthalpy injection is generally performed in a flash evaporator mode, a liquid refrigerant flows out of a condenser and is throttled by a first electronic expansion valve to generate a part of gas, the gas is injected into a compressor from an enthalpy increasing pipe by means of the flash evaporator and is used for supplementing gas and increasing the enthalpy of the compressor, and the refrigerant enters an evaporator for heat exchange after passing through the flash evaporator and being throttled by a second electronic expansion valve. Under the condition that the exhaust temperature of the compressor is determined, the second electronic expansion valve controls the flow rate of the refrigerant in the evaporator, and determines whether the energy efficiency of the evaporator is fully exerted or not, so that whether the energy efficiency of the whole machine is fully exerted or not is determined.
In some occasions, due to position limitation, when the air conditioning system is installed, shortening or lengthening of a connecting pipe (a pipeline connected between the condenser and the evaporator) needs to be considered to meet the requirement, and when the connecting pipe is shortened or lengthened, the opening degree of the second electronic expansion valve needs to be adjusted to ensure that the refrigerant flow in the evaporator is proper under the condition that the length of the connecting pipe is changed, so that the energy efficiency of the evaporator is fully exerted, and the energy efficiency of the whole machine is fully exerted.
In the conventional technology, the refrigerant flow in the evaporator is usually controlled through the suction superheat degree, but the condition of overlarge control often occurs, the phenomenon of incomplete evaporation of the evaporator can occur if the refrigerant flow is overlarge, the energy efficiency of the whole evaporator cannot be fully exerted, and the liquid return phenomenon can occur in a serious condition.
Disclosure of Invention
Therefore, it is necessary to provide a control method, a control device, a medium and an air conditioning system for an air conditioning system, which can ensure that the overall energy efficiency of the air conditioning system can be fully exerted, in order to solve the problem that the overall energy efficiency of the air conditioning system cannot be fully exerted in the prior art.
A method of controlling an air conditioning system, the method comprising:
acquiring the current temperature difference of the current connecting pipe;
determining a relative relationship between the current temperature difference and a reference temperature difference;
controlling the electronic expansion valve to work under the condition that the electronic expansion valve is adjusted from the reference opening degree to the target opening degree according to the relative relation;
the current temperature difference is an absolute value of a difference value between the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe.
In one embodiment, the obtaining the current temperature difference of the current connection pipe includes:
and detecting the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe in real time to obtain the current temperature difference.
In one embodiment, before determining the relative relationship between the current temperature difference and the reference temperature difference, the method further includes:
and acquiring the type information of the air conditioning system, and searching the reference temperature difference corresponding to the type information to obtain the reference temperature difference corresponding to the air conditioning system.
In one embodiment, after determining the relative relationship between the current temperature difference and the reference temperature difference, and before controlling the electronic expansion valve to operate from the reference opening degree to the target opening degree according to the relative relationship, the method further includes:
judging whether the time interval between the electronic expansion valve and the previous opening adjustment reaches a preset interval or not;
if yes, executing the step of controlling the electronic expansion valve to work under the condition that the electronic expansion valve is adjusted from the reference opening degree to the target opening degree according to the relative relation;
if not, returning to the step of acquiring the current temperature difference of the current connecting pipe.
In one embodiment, the controlling the electronic expansion valve to operate from a reference opening degree to a target opening degree according to the relative relationship includes:
determining a corresponding preset relation constant according to the relative relation;
and controlling the electronic expansion valve to work under the condition that the reference opening degree is adjusted to the target opening degree according to the preset relation constant.
In one embodiment, the controlling the electronic expansion valve to operate from a reference opening degree to a target opening degree according to the relative relationship includes:
when the ratio of the current temperature difference to the reference temperature difference is greater than or equal to a first preset ratio and smaller than a second preset ratio, adjusting the target opening degree to be equal to the reference opening degree;
when the ratio of the current temperature difference to the reference temperature difference is greater than or equal to a second preset ratio and smaller than a third preset ratio, adjusting the electronic expansion valve to increase to a first preset opening degree;
when the ratio of the current temperature difference to the reference temperature difference is larger than or equal to a third preset ratio, adjusting the electronic expansion valve to increase to a second preset opening degree;
the first preset ratio, the second preset ratio and the third preset ratio are all larger than or equal to 1, the second preset opening degree is larger than the first preset opening degree, and the second preset opening degree and the first preset opening degree are all larger than the reference opening degree.
A control device of an air conditioning system, comprising:
the acquisition module is used for acquiring the current temperature difference of the current connecting pipe;
the determining module is used for determining the relative relation between the current temperature difference and the reference temperature difference;
the control module is used for controlling the electronic expansion valve to work under the condition that the electronic expansion valve is adjusted from the reference opening degree to the target opening degree according to the relative relation;
the current temperature difference is an absolute value of a difference value between the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe.
In one embodiment, further comprising:
and the judging module is used for judging whether the time interval between the time interval and the previous time for adjusting the opening degree of the electronic expansion valve reaches a preset interval or not.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any of the above.
A control device comprising a memory storing a computer program and a processor implementing the steps of the method of any preceding claim when the processor executes the computer program.
An air conditioning system comprises the control equipment, wherein the air conditioning system is provided with an electronic expansion valve, and the control equipment is connected with the electronic expansion valve of the air conditioning system.
According to the control method, the device, the control equipment, the medium and the air conditioning system of the air conditioning system, the electronic expansion valve is controlled to work under the condition that the electronic expansion valve is adjusted to the target opening degree from the reference opening degree according to the relative relation between the current temperature difference and the reference temperature difference, so that the opening degree of the electronic expansion valve meets the requirement under the current connecting pipe length, the medium flow in the evaporator with the current connecting pipe length is ensured to be proper, the energy efficiency of the evaporator is fully exerted, the refrigerant is enabled to generate phase change under the saturated state, the energy efficiency of the whole machine is further ensured to be fully exerted, and the whole machine is enabled to run in an efficient manner under the condition that the length of the connecting pipe is changed.
Drawings
FIG. 1 is a flow chart illustrating a method for controlling an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for controlling an air conditioning system according to another embodiment of the present invention;
fig. 3 is a block diagram showing a control apparatus of an air conditioning system according to an embodiment of the present invention;
FIG. 4 is an internal block diagram of a control device in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;
fig. 6 is a schematic view showing the structure of the compressor shown in fig. 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, a control method of an air conditioning system is provided, which is described by taking the method as an example of being applied to a control device, where the control device is a device for implementing operation control of the air conditioning system, such as a control main board of the air conditioning system, and the method includes the following steps:
s110: acquiring the current temperature difference of the current connecting pipe;
the air conditioning system comprises a compressor, an outdoor heat exchanger, a throttling mechanism (comprising a first electronic expansion valve and a second electronic expansion valve) and an indoor heat exchanger which are sequentially communicated. Specifically, the compressor is a two-stage compressor, the air conditioning system further comprises a flash evaporator, the liquid refrigerant flows out of the condenser, is throttled by the first electronic expansion valve to generate a part of gas, is sprayed into the compressor from the enthalpy increasing pipe by means of the flash evaporator to supplement air and increase enthalpy for the compressor, and enters the evaporator for heat exchange after being throttled by the second electronic expansion valve and passing through the flash evaporator. The current temperature difference refers to a current temperature difference of a current connecting pipe (the connecting pipe is a pipeline connected between the indoor heat exchanger and the outdoor heat exchanger) adopted by the air conditioning system, and the current temperature difference is an absolute value of a difference value between a refrigerant inlet temperature of the current connecting pipe and a refrigerant outlet temperature of the current connecting pipe. Specifically, the control device may obtain the current temperature difference.
S120: determining a relative relationship between the current temperature difference and the reference temperature difference;
the control device can determine the reference temperature difference when the standard connecting pipe is adopted by the air conditioning system under the condition that the type of the air conditioning system is determined. If the length of the connecting pipe adopted by the air conditioning system changes, and accordingly the refrigerant filling amount of the connecting pipe changes, the current temperature difference of the air conditioning system changes. Specifically, the relative relationship may be a magnitude relationship between the current temperature difference and the reference temperature difference.
S130: and controlling the electronic expansion valve to work under the condition that the electronic expansion valve is adjusted from the reference opening degree to the target opening degree according to the relative relation.
And controlling the electronic expansion valve to work under the condition that the electronic expansion valve is adjusted from the reference opening to the target opening according to the relative relation, namely controlling the opening of the electronic expansion valve to be matched with the length of the current connecting pipe by the control equipment.
According to the control method of the air conditioning system, the electronic expansion valve is controlled to work under the condition that the electronic expansion valve is adjusted to the target opening degree from the reference opening degree according to the relative relation between the current temperature difference and the reference temperature difference, so that the opening degree of the electronic expansion valve meets the requirement under the current connecting pipe length, the appropriate flow rate of refrigerant in the evaporator with the current connecting pipe length is ensured, the energy efficiency of the evaporator is fully exerted, the energy efficiency of the whole machine is fully exerted, and the whole machine can run efficiently under the condition that the length of the connecting pipe is changed.
Here, the electronic expansion valve that is operated by controlling the electronic expansion valve to adjust from the reference opening degree to the target opening degree based on the relative relationship is the second electronic expansion valve described above.
It should be noted that, the target opening degree of the electronic expansion valve during operation of the electronic expansion valve controlled from the reference opening degree to the target opening degree according to the relative relationship may be larger than the reference opening degree, may also be smaller than the reference opening degree, and may also be equal to the reference opening degree, and the magnitude relationship between the target opening degree and the reference opening degree is determined according to the relative relationship between the current temperature difference and the reference temperature difference.
In one embodiment, step S110 includes:
and detecting the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe in real time to obtain the current temperature difference.
When the air conditioning system operates, the refrigerant inlet temperature of the current connecting pipe is equal to the refrigerant outlet temperature of the condenser, and the refrigerant outlet temperature of the current connecting pipe is equal to the refrigerant inlet temperature of the evaporator. Specifically, the terminal can directly obtain the refrigerant outlet temperature of the condenser and the refrigerant inlet temperature of the evaporator in real time to obtain the current temperature difference. More specifically, temperature sensors may be disposed at a refrigerant inlet and a refrigerant outlet of the current connection pipe, and the control device obtains the refrigerant inlet temperature and the refrigerant outlet temperature of the current connection pipe respectively by detecting data collected by the two temperature sensors in real time; or temperature sensors are arranged at a refrigerant outlet of the condenser and a refrigerant inlet of the evaporator, and the control equipment respectively obtains the refrigerant inlet temperature and the refrigerant outlet temperature of the current connecting pipe by detecting the collected data of the two temperature sensors in real time.
In one embodiment, step S120 further includes a reference temperature difference obtaining step, including: and acquiring type information of the air conditioning system, and searching for a reference temperature difference corresponding to the type information to obtain the reference temperature difference corresponding to the air conditioning system.
The air conditioning system can be generally divided into different types according to different applicable working conditions and compressor models, for example, the air conditioning system can be divided into a low-temperature working condition unit, a normal-temperature working condition unit and a high-temperature working condition unit. The type information of the air conditioning system is identification information for identifying the type of the air conditioning system, and may be a unit model, for example. Specifically, the control device may receive the type information of the air conditioning system input by the user, or may automatically read the type information of the air conditioning system.
One type of information corresponds to one reference temperature. Specifically, the control device may store a correspondence table between the type information and the reference temperature in advance, and search the correspondence table according to the acquired type information to obtain the reference temperature corresponding to the type information.
And the reference temperature difference corresponding to the air conditioning system is determined according to the type information of the air conditioning system, so that the method is convenient and quick. It is to be understood that the execution sequence of the reference temperature difference obtaining step and the step S110 is not limited, the step S110 may be executed first and then the reference temperature difference obtaining step is executed, the step S110 may be executed first and then the step S110 may be executed, or the step S110 and the reference temperature difference obtaining step may be executed simultaneously. It is understood that in other embodiments, the control device may also directly and fixedly pre-store the reference temperature difference of one type of air conditioning system, the type information of the air conditioning system does not need to be acquired before step S120, and the pre-stored reference opening degree is directly called when step S120 is executed.
In one embodiment, after step S120 and before step S130, the method further includes: judging whether the time interval between the electronic expansion valve and the previous opening adjustment reaches a preset interval or not;
if yes, go to step S130; if not, the process returns to step S120.
The preset interval can be specifically set according to actual needs. The step S130 is executed to adjust the opening degree of the electronic expansion valve by determining whether the time interval between the step S130 and the previous step of adjusting the opening degree of the electronic expansion valve reaches the preset interval, otherwise, the step S120 is executed again, so that the electronic expansion valve can be periodically controlled, and the control effect is good.
Specifically, the preset interval may be 30 seconds. Namely, every 30 seconds, the electronic expansion valve is controlled to work under the condition that the electronic expansion valve is adjusted to the target opening degree from the reference opening degree according to the relative relation, the interval time is not too short or too long, and the control effect can be further optimized.
It is understood that in other embodiments, other ways may be used to realize the periodic opening adjustment of the electronic expansion valve.
In one embodiment, step S130 includes:
determining a corresponding preset relation constant according to the relative relation;
and controlling the electronic expansion valve to work under the condition that the reference opening degree is adjusted to the target opening degree according to a preset relation constant.
The relation constant is a preset numerical value. Specifically, a reference temperature difference for experiment and a temperature difference for experiment are obtained, an equation set is established and solved by adopting a preset calculation model according to the reference temperature difference for experiment and the temperature difference for experiment, and a numerical value is obtained and set as a relation constant.
The relation constant can be determined by performing experiments on the experimental air conditioning system and based on data obtained by the experiments. Specifically, when the experimental air conditioning system is operated, the opening degree of the electronic expansion valve may be adjusted to a target opening degree, and the temperature difference of the connection pipe at the target opening degree may be measured as a set of experimental data.
The reference temperature difference for the experiment is determined according to the type of the air conditioning system for the experiment. Further, the type of the experimental air conditioning system may be the same as the type of the air conditioning system to which the electronic expansion valve whose opening degree needs to be adjusted belongs.
Referring to fig. 2, in one embodiment, step S130 includes:
and when the ratio of the current temperature difference to the reference temperature difference is greater than or equal to a first preset ratio and smaller than a second preset ratio, adjusting the target opening to be equal to the reference opening. The first preset ratio and the second preset ratio are both greater than or equal to 1.
Because the refrigerant can exchange heat with the environment in the flowing process of the connecting pipe, the cold quantity loss is caused, and the length change of the connecting pipe can be judged according to the relation between the current temperature difference and the reference temperature difference. If the ratio of the current temperature difference to the reference temperature difference is larger than or equal to the first preset ratio and smaller than the second preset ratio, the length of the current connecting pipe is proved to be moderate (the difference between the length of the current connecting pipe and the length of the reference connecting pipe is not large), the target opening degree is adjusted to be equal to the reference opening degree, so that the opening degree of the electronic expansion valve meets the requirement of the current connecting pipe under the length, the appropriate flow of refrigerant in the evaporator with the current connecting pipe length is ensured, the energy efficiency of the evaporator is fully exerted, and the energy efficiency of the whole machine is fully exerted.
Specifically, the first predetermined ratio is 1, and the second predetermined ratio is 1.05. It is understood that, in other embodiments, the first preset ratio and the second preset ratio may also take other values, and are not limited herein.
And when the ratio of the current temperature difference to the reference temperature difference is greater than or equal to a second preset ratio and smaller than a third preset ratio, adjusting the electronic expansion valve to increase to a first preset opening degree. The third preset ratio is greater than or equal to 1, and the first preset opening degree is greater than the reference opening degree.
If the ratio of the current temperature difference to the reference temperature difference is larger than or equal to the second preset ratio and smaller than the third preset ratio, the length of the current connecting pipe is proved to be longer, the electronic expansion valve is adjusted to be increased to the first preset opening degree, so that the opening degree of the electronic expansion valve meets the requirement of the current connecting pipe length, the refrigerant flow in the evaporator with the current connecting pipe length is ensured to be proper, the energy efficiency of the evaporator is fully exerted, and the energy efficiency of the whole machine is fully exerted.
Specifically, the third predetermined ratio is 1.25, and it is understood that in other embodiments, other values may be selected for the third predetermined ratio, and the third predetermined ratio is not limited herein.
More specifically, for 24K, when the connecting pipe length is 30m, the first preset opening degree is 1.5 × the reference opening degree. It is contemplated that in other embodiments, other values may be selected for the predetermined relationship constant for other types and different refrigerant charge amounts.
And when the ratio of the current temperature difference to the reference temperature difference is larger than or equal to a third preset ratio, adjusting the electronic expansion valve to increase to a second preset opening degree. And the second preset opening degree is greater than the first preset opening degree.
If the ratio of the current temperature difference to the reference temperature difference is larger than or equal to a third preset ratio, the length of the current connecting pipe is proved to be very long, and the electronic expansion valve is adjusted to be increased to a second preset opening degree, so that the opening degree of the electronic expansion valve meets the requirement of the current connecting pipe length, the refrigerant flow in the evaporator with the current connecting pipe length is ensured to be proper, the energy efficiency of the evaporator is fully exerted, and the energy efficiency of the whole machine is fully exerted.
Specifically, for 24K, when the connecting pipe length is 30m, the first preset opening degree is 1.5 × the reference opening degree. It is contemplated that in other embodiments, other values may be selected for the predetermined relationship constant for other types and different refrigerant charge amounts.
It should be understood that although the various steps in the flow charts of fig. 1-2 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-2 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 3, there is provided a control apparatus of an air conditioning system, including: an acquisition module 200, a determination module 300, and a control module 400. The obtaining module 200 is configured to obtain a current temperature difference of a current connecting pipe, the determining module 300 is configured to determine a relative relationship between the current temperature difference and a reference temperature difference, and the control module 400 is configured to control the electronic expansion valve to operate from a reference opening degree to a target opening degree according to the relative relationship.
According to the control device of the air conditioning system, the electronic expansion valve is controlled to work under the condition that the electronic expansion valve is adjusted to the target opening degree from the reference opening degree according to the relative relation between the current temperature difference and the reference temperature difference, so that the opening degree of the electronic expansion valve meets the requirement under the current connecting pipe length, the appropriate flow of refrigerant in the evaporator with the current connecting pipe length is ensured, the energy efficiency of the evaporator is fully exerted, the energy efficiency of the whole machine is fully exerted, and the whole machine can run in a high-energy-efficiency mode under the condition that the length of the connecting pipe is changed.
In one embodiment, the control device of the air conditioning system further includes a judging module, where the judging module is configured to judge whether a time interval between the time interval and a previous time for adjusting the opening degree of the electronic expansion valve reaches a preset interval, so as to implement periodic control over the electronic expansion valve, and the control effect is good.
For specific limitations of the control device of the air conditioning system, reference may be made to the above limitations of the control method of the air conditioning system, which are not described herein again. All or part of each module in the control device of the air conditioning system can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, as shown in FIG. 4, a control device is provided that includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the control device is configured to provide computational and control capabilities. The memory of the control device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The network interface of the control device is used for communicating with an external terminal through network connection. The computer program is executed by a processor to implement a control method of an air conditioning system. The display screen of the control device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the control device can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the control device, an external keyboard, a touch pad or a mouse and the like.
Those skilled in the art will appreciate that the block diagrams that are merely part of the structures associated with the embodiments of the present application do not constitute limitations on the computing devices to which the embodiments of the present application may be applied, and that a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a control device is provided, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the air conditioning system control method when executing the computer program.
The control equipment realizes the steps of the control method of the air conditioning system, and similarly, the opening degree of the electronic expansion valve can meet the requirement of the current length of the connecting pipe, and the appropriate flow of refrigerant in the evaporator with the current length of the connecting pipe is ensured, so that the energy efficiency of the evaporator is fully exerted, the energy efficiency of the whole machine is fully exerted, and the whole machine can run with high energy efficiency under the condition of changing the length of the connecting pipe.
In one embodiment, a computer readable storage medium is provided, having a computer program stored thereon, which, when being executed by a processor, carries out the steps of the aforementioned air conditioning system control method.
The computer readable storage medium can realize the steps of the control method of the air conditioning system, and similarly, the opening degree of the electronic expansion valve can meet the requirement of the current length of the connecting pipe, and the flow of the refrigerant in the evaporator with the current length of the connecting pipe is ensured to be proper, so that the energy efficiency of the evaporator is fully exerted, the energy efficiency of the whole machine is fully exerted, and the whole machine can run with high energy efficiency under the condition that the length of the connecting pipe is changed.
In one embodiment, an air conditioning system is provided, which comprises the control device, wherein the air conditioning system is provided with a compressor, and the control device is connected with the compressor of the air conditioning system.
In the air conditioning system, the control device executes the steps of the control method of the air conditioning system, and similarly, the opening degree of the electronic expansion valve can meet the requirement of the current length of the connecting pipe, and the appropriate flow rate of refrigerant in the evaporator of the current length of the connecting pipe is ensured, so that the energy efficiency of the evaporator is fully exerted, and the energy efficiency of the whole machine is fully exerted.
The air conditioning system comprises devices required for cooling or heating. Specifically, as shown in fig. 5, the air conditioning system 100 includes a compressor 10, a four-way valve 20, an outdoor heat exchanger 30, a flash evaporator 40, a connection pipe 50, an enthalpy-increasing pipe 60, an enthalpy-increasing valve 70, a first throttling mechanism 80, a second throttling mechanism 90, and an indoor heat exchanger 110. The compressor 10 has an exhaust port 11, a suction port 12, and an enthalpy increasing port 13 (see fig. 6), and the four-way valve 20 has a first port 21, a second port 22, a third port 23, and a fourth port 24. An exhaust port 11 of the compressor 10 is communicated with a first port 21 of the four-way valve 20, both ends of the outdoor heat exchanger 30 are respectively communicated with a second port 22 of the four-way valve 20 and one end of a connecting pipe 50, the flash evaporator 40 is assembled on the connecting pipe 50, the connecting pipe 50 is divided into a first section and a second section by the flash evaporator 40, the first throttling mechanism 80 is assembled on the first section, the second throttling mechanism 90 is assembled on the second section, both ends of the indoor heat exchanger 110 are respectively communicated with the other end of the connecting pipe 50 and a third port 23 of the four-way valve 20, and an air suction port 12 of the compressor 10 is communicated with a fourth port 24 of the four-way valve 20. The enthalpy-increasing pipe 60 is communicated between the flash evaporator 40 and the enthalpy-increasing port 13 of the compressor 10, and the enthalpy-increasing valve 70 is assembled on the enthalpy-increasing pipe 60.
Further, the air conditioning system 100 further includes a gas-liquid separator 120, and the gas-liquid separator 120 is disposed between the fourth valve port 24 of the four-way valve 20 and the suction port 12 of the compressor 10, and is configured to separate gas from liquid.
During refrigeration, a high-temperature and high-pressure refrigerant discharged from the exhaust port 11 of the compressor 10 enters the outdoor heat exchanger 30 through the first valve port 21 and the second valve port 22 of the four-way valve 20 for heat exchange, a liquid refrigerant formed after heat exchange flows out of the outdoor heat exchanger 30 and then is throttled by the first throttling mechanism 80 (at this time, the first throttling mechanism 80 serves as a first electronic expansion valve) to generate a part of gas, the gas is injected into the enthalpy increasing port 13 of the compressor 10 from the enthalpy increasing pipe through the flash evaporator 40 for gas and enthalpy increase of the compressor 10, the refrigerant enters the indoor heat exchanger 110 through the flash evaporator 40 and the second throttling mechanism 90 (at this time, the second throttling mechanism 90 serves as a second electronic expansion valve) for heat exchange, and a low-temperature and low-pressure gas formed after heat exchange sequentially passes through the third valve port 23, the fourth valve port 24 and the gas-liquid separator 120 and then flows back to the suction port 12 of the compressor 10.
During heating, a high-temperature and high-pressure refrigerant discharged from the exhaust port 11 of the compressor 10 enters the indoor heat exchanger 110 through the first valve port 21 and the third valve port 23 of the four-way valve 20 to exchange heat, a liquid refrigerant formed after heat exchange flows out of the indoor heat exchanger 110 and then is throttled by the second throttling mechanism 90 (at this time, the second throttling mechanism 90 serves as a first electronic expansion valve) to generate a part of gas, the gas enters the enthalpy increasing port 13 of the compressor 10 through the enthalpy increasing pipe injection 60 by virtue of the flash evaporator 40 to supplement air and increase enthalpy for the compressor 10, the refrigerant enters the outdoor heat exchanger 30 through the flash evaporator 40 and the first throttling mechanism 80 (at this time, the first throttling mechanism 80 serves as a second electronic expansion valve) to exchange heat, and a low-temperature and low-pressure gas formed after heat exchange sequentially passes through the second valve port 22, the fourth valve port 24 and the gas-liquid separator 120 and then flows back to the suction port 12 of the compressor 10.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A method of controlling a dual stage compression air conditioning system, the method comprising:
acquiring the current temperature difference of the current connecting pipe;
determining a relative relationship between the current temperature difference and a reference temperature difference;
controlling a second electronic expansion valve at the downstream of the flash evaporator to work under the condition that the reference opening degree is adjusted to the target opening degree according to the relative relation;
the current connecting pipe is a pipeline connected between the indoor heat exchanger and the outdoor heat exchanger, and the current temperature difference is an absolute value of a difference value between the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe.
2. The method for controlling a dual-stage compression air conditioning system according to claim 1, wherein the obtaining the current temperature difference of the current connection pipe comprises:
and detecting the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe in real time to obtain the current temperature difference.
3. The method of controlling a dual-stage compression air conditioning system as claimed in claim 1, wherein before determining the relative relationship between the current temperature difference and the reference temperature difference, the method further comprises:
and acquiring the type information of the air conditioning system, and searching the reference temperature difference corresponding to the type information to obtain the reference temperature difference corresponding to the air conditioning system.
4. The method of claim 1, wherein after determining the relative relationship between the current temperature difference and the reference temperature difference, and before controlling the second electronic expansion valve downstream of the flash evaporator to operate from the reference opening to the target opening according to the relative relationship, the method further comprises:
judging whether the time interval between the first electronic expansion valve and the previous adjustment of the opening degree of the second electronic expansion valve reaches a preset interval or not;
if so, executing the step of controlling the second electronic expansion valve to work under the condition that the second electronic expansion valve is adjusted from the reference opening degree to the target opening degree according to the relative relation;
if not, returning to the step of acquiring the current temperature difference of the current connecting pipe.
5. The control method of the dual-stage compression air conditioning system according to claim 1, wherein the controlling the second electronic expansion valve downstream of the flash evaporator to operate under the condition that the reference opening degree is adjusted to the target opening degree according to the relative relationship comprises:
determining a corresponding preset relation constant according to the relative relation;
and controlling the second electronic expansion valve to work under the condition that the reference opening degree is adjusted to the target opening degree according to the preset relation constant.
6. The method for controlling a dual-stage compression air conditioning system according to any one of claims 1-5, wherein the controlling the second electronic expansion valve downstream of the flash evaporator to operate from the reference opening degree to the target opening degree according to the relative relationship comprises:
when the ratio of the current temperature difference to the reference temperature difference is greater than or equal to a first preset ratio and smaller than a second preset ratio, adjusting the target opening degree to be equal to the reference opening degree;
when the ratio of the current temperature difference to the reference temperature difference is greater than or equal to a second preset ratio and smaller than a third preset ratio, adjusting the second electronic expansion valve to increase to a first preset opening degree;
when the ratio of the current temperature difference to the reference temperature difference is larger than or equal to a third preset ratio, adjusting the second electronic expansion valve to increase to a second preset opening degree;
the first preset ratio, the second preset ratio and the third preset ratio are all larger than or equal to 1, the second preset opening degree is larger than the first preset opening degree, and the second preset opening degree and the first preset opening degree are all larger than the reference opening degree.
7. A control apparatus for a dual stage compression air conditioning system, comprising:
the acquisition module is used for acquiring the current temperature difference of the current connecting pipe;
the determining module is used for determining the relative relation between the current temperature difference and the reference temperature difference;
the control module is used for controlling the electronic expansion valve at the downstream of the flash evaporator to work under the condition that the reference opening degree is adjusted to the target opening degree according to the relative relation;
the current temperature difference is an absolute value of a difference value between the refrigerant inlet temperature of the current connecting pipe and the refrigerant outlet temperature of the current connecting pipe.
8. The control device of a dual-stage compression air conditioning system as claimed in claim 7, further comprising:
and the judging module is used for judging whether the time interval between the first time and the previous time for adjusting the opening degree of the second electronic expansion valve reaches a preset interval or not.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
10. A control device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 6 when executing the computer program.
11. A dual-stage compression air conditioning system comprising the control apparatus of claim 10, wherein the dual-stage compression air conditioning system is provided with a flash evaporator and a second electronic expansion valve disposed downstream of the flash evaporator, and the control apparatus is connected to the second electronic expansion valve of the dual-stage compression air conditioning system.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896785A (en) * | 2015-05-15 | 2015-09-09 | 广东美的暖通设备有限公司 | Enhanced vapor injection multi-online air conditioning system and control method thereof |
| CN105157173A (en) * | 2015-08-31 | 2015-12-16 | 珠海格力电器股份有限公司 | Middle enthalpy increase amount control method and system for double-stage enthalpy-increasing heat pump system |
| CN107356005A (en) * | 2016-05-10 | 2017-11-17 | 比亚迪股份有限公司 | Heat pump type air conditioning system and electric automobile |
| CN107631525A (en) * | 2017-07-31 | 2018-01-26 | 珠海格力电器股份有限公司 | A kind of double-stage compressor air-conditioning system and its control method and device |
| CN108759029A (en) * | 2018-06-19 | 2018-11-06 | 安徽美芝精密制造有限公司 | Air-conditioning system, the control method of air-conditioning system and air conditioner |
| CN110595092A (en) * | 2019-09-29 | 2019-12-20 | 海信（山东）空调有限公司 | Enhanced vapor injection air conditioning system and control method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6336066B2 (en) * | 2014-07-02 | 2018-06-06 | 三菱電機株式会社 | Air conditioner |
| CN106247652A (en) * | 2016-09-29 | 2016-12-21 | 广东美的制冷设备有限公司 | Air conditioning system and control method thereof |
-
2020
- 2020-03-24 CN CN202010212060.5A patent/CN111397104B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896785A (en) * | 2015-05-15 | 2015-09-09 | 广东美的暖通设备有限公司 | Enhanced vapor injection multi-online air conditioning system and control method thereof |
| CN105157173A (en) * | 2015-08-31 | 2015-12-16 | 珠海格力电器股份有限公司 | Middle enthalpy increase amount control method and system for double-stage enthalpy-increasing heat pump system |
| CN107356005A (en) * | 2016-05-10 | 2017-11-17 | 比亚迪股份有限公司 | Heat pump type air conditioning system and electric automobile |
| CN107631525A (en) * | 2017-07-31 | 2018-01-26 | 珠海格力电器股份有限公司 | A kind of double-stage compressor air-conditioning system and its control method and device |
| CN108759029A (en) * | 2018-06-19 | 2018-11-06 | 安徽美芝精密制造有限公司 | Air-conditioning system, the control method of air-conditioning system and air conditioner |
| CN110595092A (en) * | 2019-09-29 | 2019-12-20 | 海信（山东）空调有限公司 | Enhanced vapor injection air conditioning system and control method thereof |
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