CN117109162A - Air conditioner control method and device, computer readable storage medium and air conditioning system - Google Patents

Air conditioner control method and device, computer readable storage medium and air conditioning system Download PDF

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Publication number
CN117109162A
CN117109162A CN202311095770.4A CN202311095770A CN117109162A CN 117109162 A CN117109162 A CN 117109162A CN 202311095770 A CN202311095770 A CN 202311095770A CN 117109162 A CN117109162 A CN 117109162A
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China
Prior art keywords
temperature
degree
air conditioner
superheat
heat exchanger
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Pending
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CN202311095770.4A
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Chinese (zh)
Inventor
王喜成
王现林
杨永祥
车雯
孙伟佳
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
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Priority to CN202311095770.4A priority Critical patent/CN117109162A/en
Publication of CN117109162A publication Critical patent/CN117109162A/en
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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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • 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
    • F24F11/62—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
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity

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

Abstract

The application provides a control method and device of an air conditioner, a computer readable storage medium and an air conditioning system, wherein the method comprises the following steps: the method comprises the steps of obtaining pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of an air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger; calculating, namely calculating a difference value between the outlet temperature and the pipeline temperature to obtain a superheat degree; and an adjustment step of adjusting the opening degree of the flow rate adjustment device so that the superheat degree is adjusted to be within a predetermined range when the superheat degree is not within the predetermined range. The method solves the problem of poor refrigerating and heating effects of the air conditioner in the prior art.

Description

Air conditioner control method and device, computer readable storage medium and air conditioning system
Technical Field
The present application relates to the field of air conditioner control, and in particular, to a control method and apparatus for an air conditioner, a computer readable storage medium, and an air conditioner system.
Background
In the current industry, for an air conditioning system with adjustable flow (adopting an expansion valve as a refrigerant flow adjusting device), an exhaust temperature or exhaust superheat degree is generally adopted as a control target, and the opening and closing actions of the expansion valve are indicated through the change of the exhaust temperature or the exhaust superheat degree, so that the adjustable flow of the refrigerant is realized, and when the exhaust temperature is higher, the expansion valve is opened, the flow is increased, and when the exhaust temperature is lower, the expansion valve is closed, and the flow is reduced. However, the control method has the defects that a part of heat generated by the motor can be taken away when the refrigerant passes through the rotating motor, the motor is cooled, the temperature of the refrigerant can be increased, if the motor generates too much heat, the exhaust temperature of the compressor is high, the expansion valve is further caused to open so as to increase the flow, the amount of the refrigerant entering the evaporator is further increased, the heat exchange capacity of the heat exchanger is exceeded, the refrigerating and heating effects of the air conditioner are affected, and even the suction liquid is caused, so that the liquid impact of the compressor is caused.
Disclosure of Invention
The application aims to provide a control method and device of an air conditioner, a computer readable storage medium and an air conditioner system, which are used for at least solving the problem of poor refrigerating and heating effects of the air conditioner in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided a control method of an air conditioner, comprising: the method comprises the steps of obtaining pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of an air conditioner, and the outlet temperature is the temperature of the refrigerant at an outlet of the heat exchanger; calculating, namely calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree; and an adjustment step of adjusting the opening degree of the flow rate adjustment device so that the degree of superheat is adjusted to be within a predetermined range when the degree of superheat is not within the predetermined range.
Optionally, before acquiring the line temperature and the outlet temperature, the method further comprises: under the condition that the air conditioner is started, acquiring indoor environment temperature, outdoor environment temperature and target frequency, wherein the target frequency is the target frequency of a compressor of the air conditioner; calculating to obtain an initial opening according to the indoor environment temperature, the outdoor environment temperature and the target frequency, wherein the initial opening is the operation opening of the flow regulating device when the air conditioner is started; and controlling the flow regulating device to operate at the initial opening degree when the air conditioner is started until a first preset time is reached.
Optionally, obtaining the pipeline temperature and the outlet temperature includes: acquiring an inner tube temperature and a first outlet temperature when the operation mode of the air conditioner is a refrigeration mode, wherein the inner tube temperature is the temperature of the refrigerant in the indoor heat exchanger, and the first outlet temperature is the temperature of the refrigerant at the outlet of the indoor heat exchanger; and under the condition that the operation mode of the air conditioner is a heating mode, acquiring an outer tube temperature and a second outlet temperature, wherein the outer tube temperature is the temperature of the refrigerant in the outdoor heat exchanger, and the second outlet temperature is the temperature of the refrigerant at the outlet of the outdoor heat exchanger.
Optionally, calculating a difference between the outlet temperature and the inner tube temperature to obtain a superheat degree includes: calculating a difference value between the first outlet temperature and the inner tube temperature to obtain a first superheat degree under the condition that the operation mode of the air conditioner is the refrigeration mode, wherein the first superheat degree is used for representing the utilization efficiency of the indoor heat exchanger; and under the condition that the operation mode of the air conditioner is the heating mode, calculating the difference value between the second outlet temperature and the outer tube temperature to obtain a second superheat degree, wherein the second superheat degree is used for representing the utilization efficiency of the outdoor heat exchanger.
Optionally, in the case that the degree of superheat is not within a predetermined range, adjusting the opening degree of the flow rate adjustment device so that the degree of superheat is adjusted to be within the predetermined range includes: controlling the opening degree of the flow regulating device to be reduced when the operation mode of the air conditioner is the refrigeration mode and the first superheat degree is smaller than 0; controlling the opening degree of the flow rate regulating device to be increased under the condition that the operation mode of the air conditioner is the refrigeration mode and the first superheat degree is larger than a first preset opening degree; and controlling the opening degree of the flow regulating device to be unchanged under the condition that the operation mode of the air conditioner is the refrigeration mode, the first superheat degree is greater than or equal to 0 and the first superheat degree is smaller than or equal to the first preset opening degree.
Optionally, in the case that the degree of superheat is not within a predetermined range, adjusting the opening degree of the flow rate adjustment device so that the degree of superheat is adjusted to be within the predetermined range includes: controlling the opening degree of the flow regulating device to be reduced when the operation mode of the air conditioner is the refrigeration mode and the second superheat degree is smaller than 0; controlling the opening degree of the flow rate regulating device to be increased when the operation mode of the air conditioner is the refrigeration mode and the second superheat degree is larger than a second preset opening degree; and controlling the opening degree of the flow regulating device to be unchanged under the condition that the operation mode of the air conditioner is the refrigeration mode, the second superheat degree is greater than or equal to 0 and the second superheat degree is smaller than or equal to the second preset opening degree.
Optionally, in the case that the degree of superheat is not within a predetermined range, adjusting the opening degree of the flow rate adjustment device so that the degree of superheat is adjusted to be within the predetermined range, the method further includes: and sequentially repeating the obtaining step, the calculating step and the adjusting step for one time at intervals of a second preset time period until the air conditioner is turned off.
According to another aspect of the present application, there is provided a control device of an air conditioner, including: the first acquisition unit is used for executing the acquisition step and acquiring pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of the refrigerant in the heat exchanger of the air conditioner, and the outlet temperature is the temperature of the refrigerant at the outlet of the heat exchanger; the first calculating unit is used for executing the calculating step, calculating the difference value between the outlet temperature and the pipeline temperature, and obtaining the superheat degree; and a first adjusting unit for executing an adjusting step of adjusting the opening degree of the flow rate adjusting device so that the degree of superheat is adjusted to be within a predetermined range, in the case where the degree of superheat is not within the predetermined range.
According to still another aspect of the present application, there is provided a computer readable storage medium including a stored program, wherein the program when run controls a device in which the computer readable storage medium is located to perform any one of the methods.
According to still another aspect of the present application, there is provided an air conditioning system including: one or more processors, memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods.
By applying the technical scheme of the application, the control method of the air conditioner comprises the steps of firstly, acquiring pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of the air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger; then, calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree; finally, when the degree of superheat is not within a predetermined range, the opening degree of the flow rate adjustment device is adjusted so that the degree of superheat is adjusted to be within the predetermined range. According to the method, the difference between the outlet temperature and the pipeline temperature, namely the superheat degree, is calculated by acquiring the pipeline temperature and the outlet temperature, and the flow rate of the refrigerant is adjusted by adjusting the opening of the flow adjusting device, so that the superheat degree is adjusted to be within the preset range, the refrigerant can be completely evaporated in the heat exchanger, phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the refrigerating and heating effects are improved, and the problem of poor refrigerating and heating effects of an air conditioner in the prior art is solved.
Drawings
Fig. 1 is a block diagram showing a hardware configuration of a mobile terminal performing a control method of an air conditioner according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a control method of an air conditioner according to an embodiment of the present application.
Fig. 3 is a schematic diagram showing a flow direction of a refrigerant during a cooling operation of an air conditioner according to an embodiment of the present application;
fig. 4 is a schematic diagram showing a flow direction of a refrigerant during heating operation of an air conditioner according to an embodiment of the present application;
FIG. 5 shows a schematic illustration of an incomplete vaporization provided in accordance with an embodiment of the present application;
FIG. 6 illustrates a schematic diagram of a complete vaporization and appropriate superheat provided in accordance with an embodiment of the present application;
FIG. 7 shows a schematic diagram of a complete vaporization and excessive superheat provided in accordance with an embodiment of the present application;
fig. 8 is a block diagram showing a control apparatus of an air conditioner according to an embodiment of the present application.
Wherein the above figures include the following reference numerals:
1. an indoor heat exchanger; 2. a flow rate adjusting device; 3. an outdoor heat exchanger; 4. a compressor; 102. a processor; 104. a memory; 106. a transmission device; 108. and an input/output device.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application 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.
As described in the background art, in order to solve the problem that the refrigerating and heating effects of the air conditioner in the prior art are poor, embodiments of the present application provide a control method and apparatus for an air conditioner, a computer readable storage medium, and an air conditioning system.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
The method embodiments provided in the embodiments of the present application may be performed in a mobile terminal, a computer terminal or similar computing device. Taking a mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of the mobile terminal according to a control method of an air conditioner according to an embodiment of the present application. As shown in fig. 1, a mobile terminal may include one or more (only one is shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 for communication functions and an input-output device 108. It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely illustrative and not limiting of the structure of the mobile terminal described above. For example, the mobile terminal may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1.
The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a display method of device information in an embodiment of the present invention, and the processor 102 executes the computer program stored in the memory 104 to perform various functional applications and data processing, that is, to implement the above-described method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the mobile terminal via 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 transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is configured to communicate with the internet wirelessly.
In the present embodiment, a control method of an air conditioner operating on a mobile terminal, a computer terminal, or the like is provided, and it is to be noted that the steps shown in the flowchart of the drawings may be executed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in an order different from that shown or described herein.
Fig. 2 is a flowchart of a control method of an air conditioner according to an embodiment of the present application. As shown in fig. 2, the method comprises the steps of:
step S201, obtaining pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of an air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger;
specifically, two temperature sensing devices are arranged on the heat exchanger respectively, one is arranged in the middle of the heat exchanger and used for detecting the evaporating/condensing temperature, namely pipeline temperature, and the heat exchanger has different functions due to different refrigerating and heating modes and can be regarded as an evaporating/condensing dual-purpose type, and the other is arranged on an outlet of the heat exchanger and used for detecting the temperature value, namely outlet temperature, when the refrigerant flows out of the heat exchanger.
Step S202, calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree;
specifically, according to the working principle of the vapor compression type air source heat pump, the ideal process is that the refrigerant only realizes phase change heat absorption in the heat exchanger, a certain amount of superheat degree is reserved at the outlet section so as to prevent the liquid from being carried by the suction of the compressor, and the heat absorption side is taken as a control object on a control object.
In step S203, in the case where the degree of superheat is not within the predetermined range, the opening degree of the flow rate adjustment device is adjusted so that the degree of superheat is adjusted to be within the predetermined range.
Specifically, under the condition that the superheat degree is not in a preset range, the opening of the flow regulating device can be regulated to regulate the flow of the refrigerant, so that the superheat degree is regulated to be in the preset range, the refrigerant can be completely evaporated in the heat exchanger, the phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the suction of the compressor can be effectively prevented from carrying liquid, the running reliability of the unit is improved, and the effective regulation is realized.
The control method of the air conditioner comprises the steps of firstly, acquiring pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of the air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger; then, calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree; finally, when the degree of superheat is not within a predetermined range, the opening degree of the flow rate adjustment device is adjusted so that the degree of superheat is adjusted to be within the predetermined range. According to the method, the difference between the outlet temperature and the pipeline temperature, namely the superheat degree, is calculated by acquiring the pipeline temperature and the outlet temperature, and the flow rate of the refrigerant is adjusted by adjusting the opening of the flow adjusting device, so that the superheat degree is adjusted to be within the preset range, the refrigerant can be completely evaporated in the heat exchanger, phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the refrigerating and heating effects are improved, and the problem of poor refrigerating and heating effects of an air conditioner in the prior art is solved.
In order to ensure the cooling and heating effects, in an alternative embodiment, before the step S201, the method further includes:
step S301, under the condition that the air conditioner is started, acquiring an indoor environment temperature, an outdoor environment temperature and a target frequency, wherein the target frequency is a target frequency of a compressor of the air conditioner;
step S302, calculating an initial opening according to the indoor environment temperature, the outdoor environment temperature and the target frequency, wherein the initial opening is the operation opening of the flow regulating device when the air conditioner is started;
step S303, controlling the flow regulating device to operate at the initial opening degree when the air conditioner is started until a first preset time is reached.
Specifically, after receiving a start-up instruction, the flow regulator (electronic expansion valve) is operated to a preset initial opening P for 3min, and the preset initial opening P and the indoor environment temperature T are operated Inner ring Outdoor ambient temperature T Outer ring Compressor target frequency F Target object Correlation, p=a×t was found by fitting temperature combination experiments Inner ring +B*T Outer ring +C*F Target object +D, A, B, C, D is the constant for refrigerant flow is suitable, can evaporate completely in the heat exchanger, realizes phase change heat transfer, and refrigerant quantity and heat exchanger assorted promotes refrigeration and heats the effect.
In order to accurately detect the superheat degree, in an alternative embodiment, the step S201 includes:
step S2011, when the operation mode of the air conditioner is a cooling mode, acquiring an inner tube temperature and a first outlet temperature, wherein the inner tube temperature is a temperature of a refrigerant in the indoor heat exchanger, and the first outlet temperature is a temperature of the refrigerant at an outlet of the indoor heat exchanger;
in step S2012, when the operation mode of the air conditioner is a heating mode, an outer tube temperature and a second outlet temperature are obtained, the outer tube temperature being a temperature of the refrigerant in the outdoor heat exchanger, and the second outlet temperature being a temperature of the refrigerant at the outlet of the outdoor heat exchanger.
Specifically, as shown in fig. 3, the air conditioner includes an indoor heat exchanger 1, a flow rate adjusting device 2, an outdoor heat exchanger 3, and a compressor 4, the flow direction of the refrigerant is shown by arrows, two temperature sensing devices are provided on the indoor heat exchanger, one is provided in the middle of the heat exchanger for detecting the evaporating/condensing temperature, and is marked as the inner tube temperature T Inner pipe One is arranged at the outlet of the heat exchanger and is used for detecting the temperature value of the refrigerant flowing out of the heat exchanger and is marked as a first outlet temperature T Internal outlet The method comprises the steps of carrying out a first treatment on the surface of the As shown in fig. 4, the air conditioner includes an indoor heat exchanger 1, a flow rate adjusting device 2, an outdoor heat exchanger 3, and a compressor 4, the flow direction of the refrigerant is shown by an arrow, two temperature sensing devices are provided on the outdoor heat exchanger, one is provided in the middle of the heat exchanger for detecting the evaporating/condensing temperature, and is marked as an outer tube temperature T Outer tube One is arranged at the outlet of the heat exchanger and is used for detecting the temperature value of the refrigerant flowing out of the heat exchanger and is marked as a second outlet temperature T Out of the way 。
In order to accurately detect the superheat degree, in an alternative embodiment, the step S202 includes:
step S2021, calculating a difference between the first outlet temperature and the inner tube temperature to obtain a first superheat degree, where the first superheat degree is used to represent the utilization efficiency of the indoor heat exchanger, when the operation mode of the air conditioner is the cooling mode;
step S2022, when the operation mode of the air conditioner is the heating mode, calculating a difference between the second outlet temperature and the outer tube temperature to obtain a second superheat degree, where the second superheat degree is used to represent the utilization efficiency of the outdoor heat exchanger.
Specifically, the indoor heat exchanger is taken as a monitoring object, the indoor heat exchanger is taken as an evaporator to absorb heat, and T is detected in real time in the running process Inner pipe And T Internal outlet Calculate the first superheat Δt=t Internal outlet -T Inner pipe The utilization effect of the heat exchanger is represented by delta T, the outdoor heat exchanger is taken as a monitoring object, the outdoor heat exchanger absorbs heat for the evaporator, and T is detected in real time in the running process Outer tube And T Out of the way Calculate the second superheat Δt=t Out of the way -T Outer tube The utilization effect of the heat exchanger is characterized by Δt.
In order to ensure the cooling and heating effects, in an alternative embodiment, the step S203 includes:
step S2031 of controlling the opening degree of the flow rate adjustment device to decrease when the operation mode of the air conditioner is the cooling mode and the first superheat degree is less than 0;
step S2032 of controlling an opening degree of the flow rate adjustment device to be increased when the operation mode of the air conditioner is the cooling mode and the first degree of superheat is greater than a first predetermined opening degree;
in step S2033, when the operation mode of the air conditioner is the cooling mode, the first degree of superheat is equal to or greater than 0, and the first degree of superheat is equal to or less than the first predetermined opening degree, the opening degree of the flow rate adjustment device is controlled to be constant.
Specifically, when Δt is negative, it means that the refrigerant flows too much and cannot be completely evaporated in the heat exchanger, as shown in fig. 5, the refrigerant absorbs its own heat to evaporate due to the decrease in pressure, resulting in T Internal outlet Less than T Inner pipe The method comprises the steps of carrying out a first treatment on the surface of the When Δt is positive and has a certain residual value (generally within 2 ℃), it means that the inflow of refrigerant is proper, the refrigerant can be completely evaporated in the heat exchanger, the phase change heat exchange is realized, and the amount of refrigerant is matched with the heat exchanger as shown in fig. 6, but when Δt is positive and the residual is too large, it means that the inflow of refrigerant is small, as shown in fig. 7, the refrigerant is severely overheated in the heat exchanger, and the heat exchanger cannot be completely utilized. For example, if DeltaT is less than-1.5 ℃, the electronic expansion valve is closed at a speed of 5P/s, the amount of refrigerant entering the evaporator is reduced, the operation is stopped for 2 minutes after reaching the target opening degree, and then the driving finger is released again according to the temperature difference valueWhen delta T is more than or equal to minus 1.5 ℃ and less than or equal to 1.5 ℃, the expansion valve maintains the current opening.
In order to ensure the cooling and heating effects, in an alternative embodiment, the step S203 further includes:
step S2034 of controlling the opening degree of the flow rate adjustment device to decrease when the operation mode of the air conditioner is the cooling mode and the second superheat degree is less than 0;
Step S2035 of controlling the opening degree of the flow rate adjustment device to increase when the operation mode of the air conditioner is the cooling mode and the second degree of superheat is greater than a second predetermined opening degree;
in step S2036, when the operation mode of the air conditioner is the cooling mode, the second degree of superheat is equal to or greater than 0, and the second degree of superheat is equal to or less than the second predetermined opening degree, the opening degree of the flow rate adjustment device is controlled to be constant.
Specifically, when Δt is negative, it means that the refrigerant flows too much and cannot be completely evaporated in the heat exchanger, as shown in fig. 5, the refrigerant absorbs its own heat to evaporate due to the decrease in pressure, resulting in T Out of the way Less than T Outer tube The method comprises the steps of carrying out a first treatment on the surface of the When Δt is positive and there is a certain residual value, it means that the inflow amount of the refrigerant is proper, the refrigerant can be completely evaporated in the heat exchanger to realize the phase change heat exchange, and the amount of the refrigerant is matched with the heat exchanger as shown in fig. 6, but when Δt is positive and the residual value is too large, it means that the inflow amount of the refrigerant is small, the refrigerant is seriously overheated in the heat exchanger, and the heat exchanger is not completely utilized as shown in fig. 7. If DeltaT is less than-1.5 ℃, switching a small electronic expansion valve at a speed of 5P/s to reduce the amount of refrigerant entering the evaporator, stopping 2min after reaching a target opening, then re-issuing a driving instruction according to a temperature difference value, when DeltaT is more than or equal to-1.5 ℃ and less than or equal to-1.5 ℃, maintaining the current opening of the expansion valve, issuing an instruction every 2min, and when DeltaT is more than 1.5 ℃, switching on the electronic expansion valve at a speed of 5P/s to increase the amount of refrigerant entering the evaporator.
In order to maintain the cooling and heating effects, in an alternative embodiment, after the step S203, the method further includes:
step S401, repeating the obtaining step, the calculating step and the adjusting step for one time in sequence at intervals of a second preset time length until the air conditioner is turned off.
Specifically, an instruction is issued every 2min, when the delta T is greater than 1.5 ℃, the electronic expansion valve is opened at the speed of 5P/s, the amount of the refrigerant entering the evaporator is increased, and the instruction is circularly detected and executed until the air conditioner is shut down, so that the refrigerating and heating effects are maintained.
In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the control method of the air conditioner of the present application will be described in detail with reference to specific embodiments.
The embodiment relates to a specific control method of an air conditioner, which comprises the following steps:
step S1: two temperature sensing devices are arranged on the indoor heat exchanger, one is arranged in the middle of the heat exchanger and used for detecting the evaporating/condensing temperature, and the mark is T Inner pipe One is arranged at the outlet of the heat exchanger for detecting the temperature value of the refrigerant flowing out of the heat exchanger, marked as T Internal outlet The method comprises the steps of carrying out a first treatment on the surface of the (2) Two temperature sensing devices are arranged on the outdoor heat exchanger, one is arranged in the middle of the heat exchanger and used for detecting the evaporating/condensing temperature, and the mark is T Outer tube One is arranged at the outlet of the heat exchanger for detecting the temperature value of the refrigerant flowing out of the heat exchanger, marked as T Out of the way 。
Step S2: in the refrigeration mode, after receiving a starting instruction, the electronic expansion valve is firstly operated to a preset initial opening P for 3min, and the initial opening P and the indoor environment temperature T are preset Inner ring Outdoor ambient temperature T Outer ring Compressor target frequency F Target object Correlation, p=a×t was found by fitting temperature combination experiments Inner ring +B*T Outer ring +C*F Target object +d, A, B, C, D is a constant. After the whole system operates stably, driving the electronic expansion valve to act according to preset logic: if DeltaT is less than-1.5 ℃, the electronic expansion valve is closed at a speed of 5P/s, the amount of refrigerant entering the evaporator is reduced, and the refrigerant reachesStopping for 2min after the target opening, then re-issuing a driving instruction according to the temperature difference value, when the temperature difference value is minus 1.5 ℃ or more and delta T is minus 1.5 ℃, maintaining the current opening of the expansion valve, issuing the instruction every 2min, and when the delta T is larger than 1.5 ℃, opening the electronic expansion valve at the speed of 5P/s, and increasing the quantity of the refrigerant entering the evaporator. And the instruction loops are detected and executed.
Step S3: in the heating mode, after receiving a starting instruction, the electronic expansion valve is firstly operated to a preset initial opening P for 3min, and the preset initial opening P and the indoor environment temperature T are operated Inner ring Outdoor ambient temperature T Outer ring Compressor target frequency F Target object Correlation, p=a×t was found by fitting temperature combination experiments Inner ring +B*T Outer ring +C*F Target object +d, A, B, C, D is a constant. After the whole system operates stably, driving the electronic expansion valve to act according to preset logic: if DeltaT is less than-1.5 ℃, switching a small electronic expansion valve at a speed of 5P/s to reduce the amount of refrigerant entering the evaporator, stopping 2min after reaching a target opening, then re-issuing a driving instruction according to a temperature difference value, when DeltaT is more than or equal to-1.5 ℃ and less than or equal to-1.5 ℃, maintaining the current opening of the expansion valve, issuing an instruction every 2min, and when DeltaT is more than 1.5 ℃, switching on the electronic expansion valve at a speed of 5P/s to increase the amount of refrigerant entering the evaporator. The instruction is circularly executed.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
The embodiment of the application also provides a control device of the air conditioner, and the control device of the air conditioner can be used for executing the control method for the air conditioner. The device is used for realizing the above embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
The following describes a control device of an air conditioner provided by an embodiment of the present application.
Fig. 8 is a block diagram of a control device of an air conditioner according to an embodiment of the present application. As shown in fig. 8, the apparatus includes:
a first obtaining unit 10 for performing the obtaining step, obtaining a pipeline temperature and an outlet temperature, wherein the pipeline temperature is a temperature of a refrigerant in a heat exchanger of the air conditioner, and the outlet temperature is a temperature of the refrigerant at an outlet of the heat exchanger;
specifically, two temperature sensing devices are arranged on the heat exchanger respectively, one is arranged in the middle of the heat exchanger and used for detecting the evaporating/condensing temperature, namely pipeline temperature, and the heat exchanger has different functions due to different refrigerating and heating modes and can be regarded as an evaporating/condensing dual-purpose type, and the other is arranged on an outlet of the heat exchanger and used for detecting the temperature value, namely outlet temperature, when the refrigerant flows out of the heat exchanger.
A first calculating unit 20 for performing a calculating step to calculate a difference between the outlet temperature and the pipe temperature to obtain a degree of superheat;
specifically, according to the working principle of the vapor compression type air source heat pump, the ideal process is that the refrigerant only realizes phase change heat absorption in the heat exchanger, a certain amount of superheat degree is reserved at the outlet section so as to prevent the liquid from being carried by the suction of the compressor, and the heat absorption side is taken as a control object on a control object.
And a first adjusting unit 30 for performing an adjusting step of adjusting the opening degree of the flow rate adjusting device so that the degree of superheat is adjusted to be within a predetermined range when the degree of superheat is not within the predetermined range.
Specifically, under the condition that the superheat degree is not in a preset range, the opening of the flow regulating device can be regulated to regulate the flow of the refrigerant, so that the superheat degree is regulated to be in the preset range, the refrigerant can be completely evaporated in the heat exchanger, the phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the suction of the compressor can be effectively prevented from carrying liquid, the running reliability of the unit is improved, and the effective regulation is realized.
The control device of the air conditioner comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit acquires pipeline temperature and outlet temperature, the pipeline temperature is the temperature of refrigerant in a heat exchanger of the air conditioner, and the outlet temperature is the temperature of the refrigerant at an outlet of the heat exchanger; the first calculating unit calculates the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree; the first adjusting means adjusts the opening degree of the flow rate adjusting means so that the degree of superheat is adjusted to be within a predetermined range when the degree of superheat is not within the predetermined range. The device obtains the difference between the outlet temperature and the pipeline temperature through obtaining the pipeline temperature and the outlet temperature, namely the superheat degree, and adjusts the refrigerant flow through adjusting the opening of the flow adjusting device, so that the superheat degree is adjusted to be in the preset range, the refrigerant can be completely evaporated in the heat exchanger, the phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the refrigerating and heating effects are improved, and the problem of poor refrigerating and heating effects of an air conditioner in the prior art is solved.
In order to ensure the cooling and heating effect, in an alternative embodiment, the apparatus further comprises:
the second acquisition unit is used for acquiring the indoor environment temperature, the outdoor environment temperature and the target frequency under the condition that the air conditioner is started before acquiring the inner pipe temperature and the outlet temperature, wherein the target frequency is the target frequency of the compressor of the air conditioner;
a second calculating unit, configured to calculate an initial opening according to the indoor environment temperature, the outdoor environment temperature, and the target frequency, where the initial opening is an operation opening of the flow regulator when the air conditioner is turned on;
and the second adjusting unit is used for controlling the flow regulating device to operate at the initial opening degree when the air conditioner is started until the first preset time is reached.
Specifically, after receiving a start-up instruction, the flow regulator (electronic expansion valve) is operated to a preset initial opening P for 3min, and the preset initial opening P and the indoor environment temperature T are operated Inner ring Outdoor ambient temperature T Outer ring Compressor target frequency F Target object Correlation, p=a×t was found by fitting temperature combination experiments Inner ring +B*T Outer ring +C*F Target object +D, A, B, C, D is the constant for refrigerant flow is suitable, can evaporate completely in the heat exchanger, realizes phase change heat transfer, and refrigerant quantity and heat exchanger assorted promotes refrigeration and heats the effect.
In order to accurately detect the degree of superheat, in an alternative embodiment, the first obtaining unit includes:
a first obtaining module, configured to obtain an inner tube temperature and a first outlet temperature when the operation mode of the air conditioner is a cooling mode, where the inner tube temperature is a temperature of a refrigerant in the indoor heat exchanger, and the first outlet temperature is a temperature of the refrigerant at an outlet of the indoor heat exchanger;
and the second acquisition module is used for acquiring the outer tube temperature and the second outlet temperature when the operation mode of the air conditioner is a heating mode, wherein the outer tube temperature is the temperature of the refrigerant in the outdoor heat exchanger, and the second outlet temperature is the temperature of the refrigerant at the outlet of the outdoor heat exchanger.
Specifically, as shown in fig. 3, the air conditioner includes an indoor heat exchanger 1, a flow rate adjusting device 2, an outdoor heat exchanger 3, and a compressor 4, the flow direction of the refrigerant is shown by arrows, two temperature sensing devices are provided on the indoor heat exchanger, one is provided in the middle of the heat exchanger for detecting the evaporating/condensing temperature, and is marked as the inner tube temperature T Inner pipe One is arranged at the outlet of the heat exchanger and is used for detecting the temperature value of the refrigerant flowing out of the heat exchanger and is marked as a first outlet temperature T Internal outlet The method comprises the steps of carrying out a first treatment on the surface of the As shown in fig. 4, the air conditioner includes an indoor heat exchanger 1, a flow rate adjusting device 2, an outdoor heat exchanger 3, and a compressor 4, the flow direction of the refrigerant is shown by an arrow, two temperature sensing devices are provided on the outdoor heat exchanger, one is provided in the middle of the heat exchanger for detecting the evaporating/condensing temperature, and is marked as an outer tube temperature T Outer tube One is arranged at the outlet of the heat exchanger and is used for detecting the temperature value of the refrigerant flowing out of the heat exchanger and is marked as a second outlet temperature T Out of the way 。
In order to accurately detect the degree of superheat, in an alternative embodiment, the first calculating unit includes:
the first calculation module is used for calculating the difference between the first outlet temperature and the inner tube temperature to obtain a first superheat degree, and the first superheat degree is used for representing the utilization efficiency of the indoor heat exchanger under the condition that the operation mode of the air conditioner is the refrigeration mode;
and the second calculation module is used for calculating the difference value between the second outlet temperature and the outer tube temperature to obtain a second superheat degree under the condition that the operation mode of the air conditioner is the heating mode, and the second superheat degree is used for representing the utilization efficiency of the outdoor heat exchanger.
Specifically, the indoor heat exchanger is taken as a monitoring object, the indoor heat exchanger is taken as an evaporator to absorb heat, and T is detected in real time in the running process Inner pipe And T Internal outlet Calculate the first superheat Δt=t Internal outlet -T Inner pipe The utilization effect of the heat exchanger is represented by delta T, the outdoor heat exchanger is taken as a monitoring object, the outdoor heat exchanger absorbs heat for the evaporator, and T is detected in real time in the running process Outer tube And T Out of the way Calculate the second superheat Δt=t Out of the way -T Outer tube The utilization effect of the heat exchanger is characterized by Δt.
In order to ensure the cooling and heating effects, in an alternative embodiment, the first adjusting unit includes:
a first adjustment module for controlling the opening degree of the flow rate adjustment device to be reduced when the operation mode of the air conditioner is the cooling mode and the first superheat degree is less than 0;
a second adjustment module for controlling the opening of the flow rate adjustment device to increase when the operation mode of the air conditioner is the cooling mode and the first superheat degree is greater than a first predetermined opening degree;
and a third adjustment module, configured to control the opening degree of the flow rate adjustment device to remain unchanged when the operation mode of the air conditioner is the cooling mode, the first degree of superheat is greater than or equal to 0, and the first degree of superheat is less than or equal to the first predetermined opening degree.
Specifically, when Δt is negative, it means that the refrigerant flows too much and cannot be completely evaporated in the heat exchanger, as shown in fig. 5, the refrigerant absorbs its own heat to evaporate due to the decrease in pressure, resulting in T Internal outlet Less than T Inner pipe The method comprises the steps of carrying out a first treatment on the surface of the When Δt is positive and has a certain residual value (generally within 2 ℃), it means that the inflow of refrigerant is proper, the refrigerant can be completely evaporated in the heat exchanger, the phase change heat exchange is realized, and the amount of refrigerant is matched with the heat exchanger as shown in fig. 6, but when Δt is positive and the residual is too large, it means that the inflow of refrigerant is small, as shown in fig. 7, the refrigerant is severely overheated in the heat exchanger, and the heat exchanger cannot be completely utilized. For example, if DeltaT < -1.5deg.C, the electronic expansion valve is turned down at a speed of 5P/s, the amount of refrigerant entering the evaporator is reduced, the evaporator is stopped for 2min after reaching the target opening, and then the driving instruction is issued again according to the temperature difference value, and when DeltaT is less than or equal to-1.5deg.C and less than or equal to 1.5deg.C, the expansion valve maintains the current opening.
In order to ensure the cooling and heating effects, in an alternative embodiment, the first adjusting unit further includes:
a fourth adjustment module for controlling the opening degree of the flow rate adjustment device to be reduced when the operation mode of the air conditioner is the cooling mode and the second superheat degree is less than 0;
A fifth adjustment module for controlling the opening of the flow rate adjustment device to increase when the operation mode of the air conditioner is the cooling mode and the second superheat degree is greater than a second predetermined opening degree;
and a sixth adjustment module, configured to control the opening degree of the flow rate adjustment device to remain unchanged when the operation mode of the air conditioner is the cooling mode, the second degree of superheat is greater than or equal to 0, and the second degree of superheat is less than or equal to the second predetermined opening degree.
Specifically, when Δt is negative, it means that the refrigerant flows too much and cannot be completely evaporated in the heat exchanger, as shown in fig. 5Due to the reduction of pressure, the refrigerant absorbs own heat to evaporate, resulting in T Out of the way Less than T Outer tube The method comprises the steps of carrying out a first treatment on the surface of the When Δt is positive and there is a certain residual value, it means that the inflow amount of the refrigerant is proper, the refrigerant can be completely evaporated in the heat exchanger to realize the phase change heat exchange, and the amount of the refrigerant is matched with the heat exchanger as shown in fig. 6, but when Δt is positive and the residual value is too large, it means that the inflow amount of the refrigerant is small, the refrigerant is seriously overheated in the heat exchanger, and the heat exchanger is not completely utilized as shown in fig. 7. If DeltaT is less than-1.5 ℃, switching a small electronic expansion valve at a speed of 5P/s to reduce the amount of refrigerant entering the evaporator, stopping 2min after reaching a target opening, then re-issuing a driving instruction according to a temperature difference value, when DeltaT is more than or equal to-1.5 ℃ and less than or equal to-1.5 ℃, maintaining the current opening of the expansion valve, issuing an instruction every 2min, and when DeltaT is more than 1.5 ℃, switching on the electronic expansion valve at a speed of 5P/s to increase the amount of refrigerant entering the evaporator.
In order to maintain the cooling and heating effects, in an alternative embodiment, the apparatus further includes:
and a repeating unit configured to adjust the opening of the flow rate adjustment device such that the acquiring step, the calculating step, and the adjusting step are sequentially repeated once at intervals of a second predetermined time period after the superheat degree is adjusted to be within the predetermined range, until the air conditioner is turned off, when the superheat degree is not within the predetermined range.
Specifically, an instruction is issued every 2min, when the delta T is greater than 1.5 ℃, the electronic expansion valve is opened at the speed of 5P/s, the amount of the refrigerant entering the evaporator is increased, and the instruction is circularly detected and executed until the air conditioner is shut down, so that the refrigerating and heating effects are maintained.
The control device of the air conditioner comprises a processor and a memory, wherein the first acquisition unit, the first calculation unit, the first adjustment unit and the like are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions. The modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The inner core can be provided with one or more than one, and the problem of poor refrigerating and heating effects of the air conditioner in the prior art is solved by adjusting the parameters of the inner core.
The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.
The embodiment of the invention provides a computer readable storage medium, which comprises a stored program, wherein the program is used for controlling equipment where the computer readable storage medium is located to execute a control method of the air conditioner.
Specifically, the control method of the air conditioner includes:
step S201, obtaining pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of an air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger;
specifically, two temperature sensing devices are arranged on the heat exchanger respectively, one is arranged in the middle of the heat exchanger and used for detecting the evaporating/condensing temperature, namely pipeline temperature, and the heat exchanger has different functions due to different refrigerating and heating modes and can be regarded as an evaporating/condensing dual-purpose type, and the other is arranged on an outlet of the heat exchanger and used for detecting the temperature value, namely outlet temperature, when the refrigerant flows out of the heat exchanger.
Step S202, calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree;
specifically, according to the working principle of the vapor compression type air source heat pump, the ideal process is that the refrigerant only realizes phase change heat absorption in the heat exchanger, a certain amount of superheat degree is reserved at the outlet section so as to prevent the liquid from being carried by the suction of the compressor, and the heat absorption side is taken as a control object on a control object.
In step S203, in the case where the degree of superheat is not within the predetermined range, the opening degree of the flow rate adjustment device is adjusted so that the degree of superheat is adjusted to be within the predetermined range.
Specifically, under the condition that the superheat degree is not in a preset range, the opening of the flow regulating device can be regulated to regulate the flow of the refrigerant, so that the superheat degree is regulated to be in the preset range, the refrigerant can be completely evaporated in the heat exchanger, the phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the suction of the compressor can be effectively prevented from carrying liquid, the running reliability of the unit is improved, and the effective regulation is realized.
The embodiment of the invention provides a processor, which is used for running a program, wherein the control method of the air conditioner is executed when the program runs.
Specifically, the control method of the air conditioner includes:
step S201, obtaining pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of an air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger;
specifically, two temperature sensing devices are arranged on the heat exchanger respectively, one is arranged in the middle of the heat exchanger and used for detecting the evaporating/condensing temperature, namely pipeline temperature, and the heat exchanger has different functions due to different refrigerating and heating modes and can be regarded as an evaporating/condensing dual-purpose type, and the other is arranged on an outlet of the heat exchanger and used for detecting the temperature value, namely outlet temperature, when the refrigerant flows out of the heat exchanger.
Step S202, calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree;
specifically, according to the working principle of the vapor compression type air source heat pump, the ideal process is that the refrigerant only realizes phase change heat absorption in the heat exchanger, a certain amount of superheat degree is reserved at the outlet section so as to prevent the liquid from being carried by the suction of the compressor, and the heat absorption side is taken as a control object on a control object.
In step S203, in the case where the degree of superheat is not within the predetermined range, the opening degree of the flow rate adjustment device is adjusted so that the degree of superheat is adjusted to be within the predetermined range.
Specifically, under the condition that the superheat degree is not in a preset range, the opening of the flow regulating device can be regulated to regulate the flow of the refrigerant, so that the superheat degree is regulated to be in the preset range, the refrigerant can be completely evaporated in the heat exchanger, the phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the suction of the compressor can be effectively prevented from carrying liquid, the running reliability of the unit is improved, and the effective regulation is realized.
The embodiment of the invention provides an air conditioning system, which comprises a processor, a memory and a program which is stored in the memory and can run on the processor, wherein the processor realizes at least the following steps when executing the program:
step S201, obtaining pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of an air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger;
specifically, two temperature sensing devices are arranged on the heat exchanger respectively, one is arranged in the middle of the heat exchanger and used for detecting the evaporating/condensing temperature, namely pipeline temperature, and the heat exchanger has different functions due to different refrigerating and heating modes and can be regarded as an evaporating/condensing dual-purpose type, and the other is arranged on an outlet of the heat exchanger and used for detecting the temperature value, namely outlet temperature, when the refrigerant flows out of the heat exchanger.
Step S202, calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree;
specifically, according to the working principle of the vapor compression type air source heat pump, the ideal process is that the refrigerant only realizes phase change heat absorption in the heat exchanger, a certain amount of superheat degree is reserved at the outlet section so as to prevent the liquid from being carried by the suction of the compressor, and the heat absorption side is taken as a control object on a control object.
In step S203, in the case where the degree of superheat is not within the predetermined range, the opening degree of the flow rate adjustment device is adjusted so that the degree of superheat is adjusted to be within the predetermined range.
Specifically, under the condition that the superheat degree is not in a preset range, the opening of the flow regulating device can be regulated to regulate the flow of the refrigerant, so that the superheat degree is regulated to be in the preset range, the refrigerant can be completely evaporated in the heat exchanger, the phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the suction of the compressor can be effectively prevented from carrying liquid, the running reliability of the unit is improved, and the effective regulation is realized.
The application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with at least the following method steps:
Step S201, obtaining pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of an air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger;
specifically, two temperature sensing devices are arranged on the heat exchanger respectively, one is arranged in the middle of the heat exchanger and used for detecting the evaporating/condensing temperature, namely pipeline temperature, and the heat exchanger has different functions due to different refrigerating and heating modes and can be regarded as an evaporating/condensing dual-purpose type, and the other is arranged on an outlet of the heat exchanger and used for detecting the temperature value, namely outlet temperature, when the refrigerant flows out of the heat exchanger.
Step S202, calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree;
specifically, according to the working principle of the vapor compression type air source heat pump, the ideal process is that the refrigerant only realizes phase change heat absorption in the heat exchanger, a certain amount of superheat degree is reserved at the outlet section so as to prevent the liquid from being carried by the suction of the compressor, and the heat absorption side is taken as a control object on a control object.
In step S203, in the case where the degree of superheat is not within the predetermined range, the opening degree of the flow rate adjustment device is adjusted so that the degree of superheat is adjusted to be within the predetermined range.
Specifically, under the condition that the superheat degree is not in a preset range, the opening of the flow regulating device can be regulated to regulate the flow of the refrigerant, so that the superheat degree is regulated to be in the preset range, the refrigerant can be completely evaporated in the heat exchanger, the phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the suction of the compressor can be effectively prevented from carrying liquid, the running reliability of the unit is improved, and the effective regulation is realized.
It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may be implemented in program code executable by computing devices, so that they may be stored in a storage device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
1) The control method of the air conditioner comprises the steps of firstly, acquiring pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of the air conditioner, and the outlet temperature is the temperature of refrigerant at an outlet of the heat exchanger; then, calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree; finally, when the degree of superheat is not within a predetermined range, the opening degree of the flow rate adjustment device is adjusted so that the degree of superheat is adjusted to be within the predetermined range. According to the method, the difference between the outlet temperature and the pipeline temperature, namely the superheat degree, is calculated by acquiring the pipeline temperature and the outlet temperature, and the flow rate of the refrigerant is adjusted by adjusting the opening of the flow adjusting device, so that the superheat degree is adjusted to be within the preset range, the refrigerant can be completely evaporated in the heat exchanger, phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the refrigerating and heating effects are improved, and the problem of poor refrigerating and heating effects of an air conditioner in the prior art is solved.
2) An acquisition unit acquiring a pipeline temperature and an outlet temperature, wherein the pipeline temperature is the temperature of a refrigerant in a heat exchanger of the air conditioner, and the outlet temperature is the temperature of the refrigerant at an outlet of the heat exchanger; the calculating unit calculates the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree; and an adjusting unit for adjusting the opening of the flow rate adjusting device so that the degree of superheat is adjusted to be within a predetermined range when the degree of superheat is not within the predetermined range. The device obtains the difference between the outlet temperature and the pipeline temperature through obtaining the pipeline temperature and the outlet temperature, namely the superheat degree, and adjusts the refrigerant flow through adjusting the opening of the flow adjusting device, so that the superheat degree is adjusted to be in the preset range, the refrigerant can be completely evaporated in the heat exchanger, the phase-change heat exchange is realized, the refrigerant quantity is matched with the heat exchanger, the refrigerating and heating effects are improved, and the problem of poor refrigerating and heating effects of an air conditioner in the prior art is solved.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A control method of an air conditioner, comprising:
the method comprises the steps of obtaining pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of refrigerant in a heat exchanger of an air conditioner, and the outlet temperature is the temperature of the refrigerant at an outlet of the heat exchanger;
calculating, namely calculating the difference between the outlet temperature and the pipeline temperature to obtain the superheat degree;
and an adjustment step of adjusting the opening degree of the flow rate adjustment device so that the degree of superheat is adjusted to be within a predetermined range when the degree of superheat is not within the predetermined range.
2. The method of claim 1, wherein prior to acquiring the line temperature and the outlet temperature, the method further comprises:
under the condition that the air conditioner is started, acquiring indoor environment temperature, outdoor environment temperature and target frequency, wherein the target frequency is the target frequency of a compressor of the air conditioner;
Calculating to obtain an initial opening according to the indoor environment temperature, the outdoor environment temperature and the target frequency, wherein the initial opening is the operation opening of the flow regulating device when the air conditioner is started;
and controlling the flow regulating device to operate at the initial opening degree when the air conditioner is started until a first preset time is reached.
3. The method of claim 1, wherein obtaining the line temperature and the outlet temperature comprises:
acquiring an inner tube temperature and a first outlet temperature when the operation mode of the air conditioner is a refrigeration mode, wherein the inner tube temperature is the temperature of the refrigerant in the indoor heat exchanger, and the first outlet temperature is the temperature of the refrigerant at the outlet of the indoor heat exchanger;
and under the condition that the operation mode of the air conditioner is a heating mode, acquiring an outer tube temperature and a second outlet temperature, wherein the outer tube temperature is the temperature of the refrigerant in the outdoor heat exchanger, and the second outlet temperature is the temperature of the refrigerant at the outlet of the outdoor heat exchanger.
4. A method according to claim 3, wherein calculating the difference between the outlet temperature and the inner tube temperature to obtain the degree of superheat comprises:
Calculating a difference value between the first outlet temperature and the inner tube temperature to obtain a first superheat degree under the condition that the operation mode of the air conditioner is the refrigeration mode, wherein the first superheat degree is used for representing the utilization efficiency of the indoor heat exchanger;
and under the condition that the operation mode of the air conditioner is the heating mode, calculating the difference value between the second outlet temperature and the outer tube temperature to obtain a second superheat degree, wherein the second superheat degree is used for representing the utilization efficiency of the outdoor heat exchanger.
5. The method according to claim 4, wherein, in the case where the degree of superheat is not within a predetermined range, adjusting the opening degree of the flow rate adjustment device so that the degree of superheat is adjusted within the predetermined range, comprises:
controlling the opening degree of the flow regulating device to be reduced when the operation mode of the air conditioner is the refrigeration mode and the first superheat degree is smaller than 0;
controlling the opening degree of the flow rate regulating device to be increased under the condition that the operation mode of the air conditioner is the refrigeration mode and the first superheat degree is larger than a first preset opening degree;
and controlling the opening degree of the flow regulating device to be unchanged under the condition that the operation mode of the air conditioner is the refrigeration mode, the first superheat degree is greater than or equal to 0 and the first superheat degree is smaller than or equal to the first preset opening degree.
6. The method according to claim 4, wherein, in the case where the degree of superheat is not within a predetermined range, adjusting the opening degree of the flow rate adjustment device so that the degree of superheat is adjusted within the predetermined range, comprises:
controlling the opening degree of the flow regulating device to be reduced when the operation mode of the air conditioner is the refrigeration mode and the second superheat degree is smaller than 0;
controlling the opening degree of the flow rate regulating device to be increased when the operation mode of the air conditioner is the refrigeration mode and the second superheat degree is larger than a second preset opening degree;
and controlling the opening degree of the flow regulating device to be unchanged under the condition that the operation mode of the air conditioner is the refrigeration mode, the second superheat degree is greater than or equal to 0 and the second superheat degree is smaller than or equal to the second preset opening degree.
7. The method according to any one of claims 1 to 6, characterized in that, in the case where the degree of superheat is not within a predetermined range, after adjusting the opening degree of the flow rate adjustment device so that the degree of superheat is adjusted within the predetermined range, the method further comprises:
and sequentially repeating the obtaining step, the calculating step and the adjusting step for one time at intervals of a second preset time period until the air conditioner is turned off.
8. A control device of an air conditioner, comprising:
the first acquisition unit is used for executing the acquisition step and acquiring pipeline temperature and outlet temperature, wherein the pipeline temperature is the temperature of the refrigerant in the heat exchanger of the air conditioner, and the outlet temperature is the temperature of the refrigerant at the outlet of the heat exchanger;
the first calculating unit is used for executing the calculating step, calculating the difference value between the outlet temperature and the pipeline temperature, and obtaining the superheat degree;
and a first adjusting unit for executing an adjusting step of adjusting the opening degree of the flow rate adjusting device so that the degree of superheat is adjusted to be within a predetermined range, in the case where the degree of superheat is not within the predetermined range.
9. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer readable storage medium is located to perform the method of any one of claims 1 to 7.
10. An air conditioning system, comprising: one or more processors, memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing the method of any of claims 1-7.
CN202311095770.4A 2023-08-28 2023-08-28 Air conditioner control method and device, computer readable storage medium and air conditioning system Pending CN117109162A (en)

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CN202311095770.4A CN117109162A (en) 2023-08-28 2023-08-28 Air conditioner control method and device, computer readable storage medium and air conditioning system

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