CN114110993A - Throttle control method and device for air conditioning system, storage medium and device - Google Patents
Throttle control method and device for air conditioning system, storage medium and device Download PDFInfo
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- CN114110993A CN114110993A CN202010866579.5A CN202010866579A CN114110993A CN 114110993 A CN114110993 A CN 114110993A CN 202010866579 A CN202010866579 A CN 202010866579A CN 114110993 A CN114110993 A CN 114110993A
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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
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a throttling control method, equipment, a storage medium and a device of an air conditioning system, relating to the technical field of air conditioners and comprising the following steps: obtaining superheat degree parameters of an indoor heat exchanger; determining a first control parameter according to the superheat degree parameter; and adjusting the opening degree of the target throttling device according to the first control parameter. According to the invention, the actual heat exchange requirement of the indoor heat exchanger is monitored by acquiring the superheat degree parameter of the indoor heat exchanger, and the throttling device is controlled according to the superheat degree parameter, so that the heat exchange capability of the indoor heat exchanger is ensured to be matched with the actual heat exchange requirement, and the system energy efficiency is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a throttling control method, throttling control equipment, a storage medium and a throttling control device for an air conditioning system.
Background
In a multi-split system, the throttle valves of the internal machine can be all placed in the branch box due to the branch box, so that the noise generated by throttling of the internal machine is avoided. At present, the throttling control mode of the branch box is usually adjusted according to the average temperature of an internal machine connected with the branch box, the heat exchange capacity of the internal machine cannot be fully exerted, and the actual heat exchange requirement of a room cannot be matched.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a throttling control method, equipment, a storage medium and a device of an air conditioning system, and aims to solve the technical problem that the throttling control mode of a branch box in the prior art cannot be matched with the actual heat exchange requirement of a room.
In order to achieve the above object, the present invention provides a throttle control method for an air conditioning system, comprising the following steps:
acquiring superheat degree parameters of an indoor heat exchanger;
determining a first control parameter according to the superheat degree parameter; and the number of the first and second groups,
and adjusting the opening degree of the target throttling device according to the first control parameter.
Optionally, the step of obtaining the superheat parameter of the indoor heat exchanger includes:
acquiring a first temperature value at the outlet side of the indoor heat exchanger;
acquiring a second temperature value of the inlet side of the indoor heat exchanger; and the number of the first and second groups,
and calculating a first temperature difference value between the second temperature value and the first temperature value, and taking the first temperature difference value as a superheat degree parameter.
Optionally, the step of determining the first control parameter according to the superheat parameter includes:
searching the corresponding adjusting step number and the adjusting period from a first preset control parameter table according to the superheat degree parameter; and the number of the first and second groups,
and taking the adjusting step number and the adjusting period as first control parameters.
Optionally, before the step of adjusting the opening degree of the target throttle device according to the first control parameter, the method further includes:
acquiring the current environment temperature of the environment where the indoor heat exchanger is located;
determining a target superheat degree parameter according to a preset target temperature and the current environment temperature;
judging whether the target superheat degree parameter meets a first preset condition or not; and the number of the first and second groups,
and when the target superheat degree parameter does not meet a first preset condition, executing the step of adjusting the opening degree of the target throttling device according to the first control parameter.
Optionally, after the step of determining whether the target superheat degree parameter meets the first preset condition, the method further includes:
when the target superheat degree parameter meets a first preset condition, searching a corresponding second control parameter from a second preset control parameter table according to the target superheat parameter; and the number of the first and second groups,
and adjusting the opening degree of the target throttling device according to the second control parameter.
Optionally, before the step of adjusting the opening degree of the target throttle device according to the first control parameter, the method further includes:
acquiring an exhaust temperature value of a compressor corresponding to the target throttling device and a fifth temperature value of a middle area of the indoor heat exchanger;
judging whether the exhaust temperature value and the fifth temperature value meet a second preset condition or not; and the number of the first and second groups,
and when the exhaust temperature value and the fifth temperature value do not meet the second preset condition, executing the step of adjusting the opening degree of the target throttling device according to the first control parameter.
Optionally, after the step of determining whether the exhaust temperature value and the fifth temperature value satisfy a second preset condition, the method further includes:
and when the exhaust temperature value and the fifth temperature value meet the second preset condition, controlling the target throttling device to enter an exhaust control mode.
In addition, in order to achieve the above object, the present invention also provides an air conditioning system throttle control apparatus, including: the air conditioning system throttling control method comprises a memory, a processor and an air conditioning system throttling control program stored on the memory and capable of running on the processor, wherein the air conditioning system throttling control program realizes the steps of the air conditioning system throttling control method when being executed by the processor.
In addition, to achieve the above object, the present invention further provides a storage medium having an air conditioning system throttling control program stored thereon, wherein the air conditioning system throttling control program, when executed by a processor, implements the steps of the air conditioning system throttling control method as described above.
In addition, in order to achieve the above object, the present invention further provides an air conditioning system throttle control device, including:
the parameter acquisition module is used for acquiring superheat degree parameters of the indoor heat exchanger;
the control parameter generation module is used for determining a first control parameter according to the superheat degree parameter; and the number of the first and second groups,
and the control module is used for adjusting the opening degree of the target throttling device according to the first control parameter.
In the invention, the superheat degree parameter of the indoor heat exchanger is obtained; determining a first control parameter according to the superheat degree parameter; and adjusting the opening degree of the target throttling device according to the first control parameter. According to the invention, the actual heat exchange requirement of the indoor heat exchanger is monitored by acquiring the superheat degree parameter of the indoor heat exchanger, and the throttling device is controlled according to the superheat degree parameter, so that the heat exchange capability of the indoor heat exchanger is ensured to be matched with the actual heat exchange requirement, and the system energy efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of an air conditioning system throttle control device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an air conditioning system according to the present invention;
FIG. 3 is a schematic flow chart illustrating a throttle control method of an air conditioning system according to a first embodiment of the present invention;
FIG. 4 is a flowchart illustrating a throttle control method for an air conditioning system according to a second embodiment of the present invention;
FIG. 5 is a flow chart illustrating a third embodiment of a throttle control method for an air conditioning system according to the present invention;
fig. 6 is a block diagram of the throttle control device of the air conditioning system according to the first embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
1001 | |
| 1002 | |
1003 | Gas- |
| 1004 | Exhaust |
1005 | Outdoor |
| 1006 | |
200 | |
| 2001 | |
2002 | Temperature sensing bag at liquid outlet side of |
| 2003 | Temperature sensing bag at air inlet side of |
300 | |
| 3001 | |
3002 | Middle temperature sensing bulb of |
| 400 | Liquid |
500 | Air pipe stop valve |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air conditioning system throttle control device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the air conditioning system throttle control apparatus may include: a processor 101, such as a Central Processing Unit (CPU), a communication bus 102, a user interface 103, a network interface 1004, and a memory 1005. Wherein the communication bus 102 is used for enabling connection communication between these components. The user interface 1003 may include a Display screen (Display), and the optional user interface 103 may also include a standard wired interface, a wireless interface, and the wired interface for the user interface 103 may be a USB interface in the present invention. The network interface 104 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 105 may be a Random Access Memory (RAM) Memory or a Non-volatile Memory (NVM), such as a disk Memory. The memory 105 may alternatively be a storage device separate from the processor 101 described above.
Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of air conditioning system throttle control apparatus and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in FIG. 1, memory 105, identified as a computer storage medium, may include an operating system, a network communication module, a user interface module, and an air conditioning system throttle control program.
In the throttle control device of the air conditioning system shown in fig. 1, the network interface 104 is mainly used for connecting a background server and performing data communication with the background server; the user interface 103 is mainly used for connecting user equipment; the air conditioning system throttling control device calls an air conditioning system throttling control program stored in the memory 105 through the processor 101 and executes the air conditioning system throttling control method provided by the embodiment of the invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an air conditioning system according to the present invention.
As shown in fig. 2, the outdoor unit 100 is connected to one side of the branch box 200, and the indoor unit 300 is connected to the other side. The indoor unit group includes a plurality of indoor units, and each indoor unit is generally installed in different environments. Taking a home environment as an example, the indoor units can be respectively arranged in a living room, a main lying area or a side lying area.
It is understood that the indoor unit includes an indoor heat exchanger 3001 for performing heat exchange. When the air conditioning system performs a cooling function, the indoor heat exchanger 3001 is an evaporation tube. A heat exchanger middle thermal bulb 3002 is provided in the middle area of the indoor heat exchanger 3001 for detecting the temperature of the heat exchanger.
It will be appreciated that a plurality of electronic expansion valves 2001 are provided in the manifold 200 for regulating the flow of the heat exchange medium. One side of the electronic expansion valve 2001 is connected to the outdoor unit 100 to receive the low-pressure liquid transmitted from the outdoor unit 100, and the other side of the electronic expansion valve 2001 is connected to the indoor heat exchanger 3001 to transmit the low-pressure liquid to the indoor heat exchanger 3001. Meanwhile, the manifold box 200 further comprises an air pipe, one side of the air pipe is connected with the indoor heat exchanger 3001, and low-pressure air transmitted by the indoor heat exchanger 3001 can be received; the other side of the air pipe is connected to the outdoor unit 100, and low-pressure air is transmitted to the outdoor unit 100.
The outlet side of the electronic expansion valve 2001 is provided with a temperature sensing bulb 2002 at the liquid outlet side of the branch tank, which is used for detecting the temperature of the low-pressure liquid delivered to the indoor heat exchanger 3001. A branch box air inlet side temperature sensing bag 2003 is arranged at the connecting side of the air pipe and the indoor heat exchanger 3001 and can be used for detecting the temperature of low-pressure gas transmitted by the indoor heat exchanger 3001.
It is understood that the outdoor unit 100 includes an outdoor heat exchanger 1001, a compressor 1002, and a gas-liquid separator 1003. The compressor 1002 is further connected to a four-way valve, one side of which is connected to a gas-liquid separator 1003, one side of which is connected to a gas pipe in the manifold 200 through a gas pipe shutoff valve 500, and the other side of which is connected to an outdoor heat exchanger 1001. The compressor 1002 may also be directly connected to the gas-liquid separator 1003. The outdoor heat exchanger 1001 is connected to the electronic expansion valve 2001 in the branch tank 200 sequentially via the outdoor expansion valve 1006, the refrigerant heat dissipation pipe 1006, and the liquid refrigerant pipe valve 400. The compressor 1002 is further provided with an exhaust bulb 1004 for detecting the exhaust temperature.
Based on the hardware structure, the embodiment of the throttling control method of the air conditioning system is provided.
Referring to fig. 3, fig. 3 is a schematic flow chart of a throttle control method of an air conditioning system according to a first embodiment of the present invention.
In a first embodiment, the air conditioning system throttle control method includes the steps of:
step S10: and obtaining superheat degree parameters of the indoor heat exchanger.
It should be understood that the main execution body of this embodiment is the air conditioning system throttling control device, which has functions of data acquisition, data communication, program operation, and the like, and the air conditioning system throttling control device may be a branch box. Of course, other devices with similar functions may be used, and the present embodiment is not limited thereto.
It should be noted that the target throttle device may be the electronic expansion valve 2001 described above. Usually, the branch box is connected with a plurality of indoor units, and when the throttling control is executed, whether the indoor units need to be judged is needed, so that the waste of control resources caused by the control of the indoor units which are not operated is avoided. Meanwhile, when the indoor unit starts to operate, the temperature change is large, and the throttle control needs to be performed after waiting for a period of time, so that the control accuracy is improved. In the concrete implementation, the throttling control can be executed after the indoor unit is started and operates for 10 minutes.
It should be noted that the superheat degree parameter is used for representing the heat exchange requirement of indoor heat exchange. Taking the refrigeration mode of the air conditioning system as an example, the indoor heat exchanger receives low-pressure liquid from the branch box and evaporates to obtain low-pressure gas. Assuming that the temperature of the low-pressure liquid is 12 ℃, and the temperature of the evaporated low-pressure gas is 16 ℃; the superheat parameter of the indoor heat exchanger is 4 deg.c. The evaporation effect of the indoor heat exchanger directly influences the heat exchange capacity of the indoor heat exchanger, and when the superheat degree parameter is larger, the larger the evaporation degree is, the smaller the superheat degree parameter is, and the smaller the evaporation degree is. Generally, in order to ensure the heat exchange capability of the indoor heat exchanger, the superheat degree parameter should not be too large or too small, and can be controlled to be about 2 ℃. The actual control parameters at present are different according to different indoor heat exchangers, and the present embodiment is not limited to this.
It is understood that the superheat parameter may be a temperature difference between the high pressure liquid and the high pressure gas when the air conditioning system is in a heating mode.
In the concrete implementation, the step of obtaining the superheat degree parameter of the indoor heat exchanger comprises the following steps: acquiring a first temperature value at the outlet side of the indoor heat exchanger; acquiring a second temperature value of the inlet side of the indoor heat exchanger; and calculating a first temperature difference value between the second temperature value and the first temperature value, and taking the first temperature difference value as a superheat degree parameter.
It should be noted that, in the cooling mode, the first temperature value on the outlet side of the indoor heat exchanger may represent the temperature of the low-pressure gas. Referring to fig. 2, in the present embodiment, a first temperature value on the outlet side of the indoor heat exchanger is acquired by the manifold intake side bulb 2003.
It should be noted that, in the cooling mode, the first temperature value at the outlet side of the indoor heat exchanger may represent the temperature of the low-pressure liquid. Referring to fig. 2, in the present embodiment, a second temperature value at the inlet side of the indoor heat exchanger is obtained by installing a temperature sensing bulb 2002 at the liquid outlet side of the branch box or a temperature sensing bulb 3002 at the middle part of the heat exchanger on the air pipe of the branch box.
In order to obtain a more accurate temperature of the low-pressure liquid, in the present embodiment, the temperature of the low-pressure liquid is collected at both the outlet side of the throttling device and the middle portion of the indoor heat exchanger, and the minimum value between the two is used as the second temperature value at the inlet side of the indoor heat exchanger. For example, if the temperature detected by the temperature sensing bulb 2002 at the liquid outlet side of the branch box is 11 ℃; the temperature detected by the middle bulb 3002 of the heat exchanger is 10.5 ℃, and the second temperature value at the inlet side of the indoor heat exchanger is 10.5 ℃.
It should be noted that the first temperature difference between the first corrected temperature value and the second temperature value has a positive value and a negative value, and the positive value and the negative value have different meanings according to different calculation manners. Specifically, if the first corrected temperature value is subtracted from the second temperature value, the larger the first temperature difference is, the higher the evaporation degree is; if the second temperature value is less than the first corrected temperature value, the opposite is true.
Step S20: and determining a first control parameter according to the superheat degree parameter.
It should be noted that, when the superheat degree parameter is too large, it indicates that the evaporation of the indoor heat exchanger is excessive, and the flow rate of the input low-pressure liquid needs to be increased; when the superheat parameter is too small, the evaporation of the indoor heat exchanger is insufficient, and the flow of the input low-pressure liquid needs to be reduced. And determining control parameters of the target throttling device according to different superheat degree parameters.
In a specific implementation, the step of determining the first control parameter according to the superheat degree parameter includes: searching the corresponding adjusting step number and the adjusting period from a first preset control parameter table according to the superheat degree parameter; and taking the adjusting step number and the adjusting period as first control parameters.
It should be noted that the first preset control parameter table may also be added to the operation configuration parameters of the branch box, and when determining the control parameters, the first preset control parameter table is locally obtained to search, so as to obtain the corresponding control parameters. Of course, the first preset control parameter table may also exist in the server, and the control device may obtain the first preset control parameter table from the server for searching; the server may also search for the control parameter and send the control parameter to the control device, which is not limited in this embodiment.
To more clearly illustrate the relationship between the superheat parameter and the control parameter, the present embodiment provides an example of a first preset control parameter table. As shown in the following table:
it should be noted that the superheat parameter may also correspond to other adjustment step values and adjustment period values, which is not limited in this embodiment.
Step S30: and adjusting the opening degree of the target throttling device according to the first control parameter.
It can be understood that, by adjusting the opening degree of the target throttling device, the flow rate of the low-pressure liquid input by the corresponding indoor heat exchanger can be adjusted, so that the evaporation effect of the indoor heat exchanger can be adjusted.
In the first embodiment, the superheat degree parameter of the indoor heat exchanger is obtained; determining a first control parameter according to the superheat degree parameter; and adjusting the opening degree of the target throttling device according to the first control parameter. The actual heat exchange requirement of the indoor heat exchanger is monitored by acquiring the superheat degree parameter of the indoor heat exchanger, the throttling device is controlled according to the superheat degree parameter, the heat exchange capacity of the indoor heat exchanger is matched with the actual heat exchange requirement, and therefore the system energy efficiency is improved.
Referring to fig. 4, fig. 4 is a flowchart illustrating a throttling control method of an air conditioning system according to a second embodiment of the present invention, and the throttling control method of an air conditioning system according to the second embodiment of the present invention is proposed based on the first embodiment.
In the second embodiment, before step S30, the method further includes:
s210: and acquiring the current ambient temperature of the environment where the indoor heat exchanger is located.
It should be noted that the superheat parameter is a difference between the low-pressure gas and the low-pressure liquid, and cannot reflect a specific temperature value of the low-pressure gas or the low-pressure liquid. Taking the refrigeration mode as an example, the superheat degree parameter is 2 ℃ when the low-pressure gas is 16 ℃, the low-pressure liquid is 14 ℃ and when the low-pressure gas is 20 ℃ and the low-pressure liquid is 18 ℃. However, the heat exchange capacities of the indoor heat exchangers are different under the two conditions, and obviously, when the low-pressure gas is 16 ℃ and the low-pressure liquid is 14 ℃, the refrigeration effect of the indoor heat exchanger is better.
Therefore, in order to further ensure the heat exchange capability of the indoor heat exchanger under the control of superheat parameters, such as a refrigeration mode, the temperature of the low-pressure liquid input by the indoor heat exchanger needs to be ensured to be in a proper range. If the current ambient temperature is 30 ℃ and the user expected temperature is 26 ℃, the heat exchange requirement of the indoor heat exchanger is high, and the temperature value of the input low-pressure liquid needs to be adjusted so as to adjust the heat exchange capacity of the indoor heat exchanger as soon as possible.
In specific implementation, the indoor unit is further provided with a temperature sensing bulb for measuring the outside temperature so as to obtain the current environment temperature of the environment where the indoor heat exchanger is located.
S211: and determining a target superheat degree parameter according to a preset target temperature and the current environment temperature.
It should be noted that the preset target temperature refers to an ambient temperature required by a user. Generally, in summer, the preset target temperature can be set between 26 ℃ and 28 ℃. Determining the target superheat parameter according to the preset target temperature and the current ambient temperature refers to determining the target superheat parameter according to a difference value between the preset target temperature and the current ambient temperature.
It should be noted that the target superheat parameter may be indicative of a desired temperature value for the low pressure liquid. The larger the difference between the current ambient temperature and the preset target temperature is, the larger the heat exchange requirement of indoor heat exchange is, and the lower-temperature low-pressure liquid is needed.
It will be appreciated that since the difference between the preset target temperature and the current ambient temperature may be 0 ℃ or negative, it is not appropriate to directly use the difference as the target temperature of the low pressure liquid. Therefore, if the present embodiment is provided with the base target temperature, the target superheat parameter can be represented by the following equation:
T_Target＝C1+C2
wherein T _ Target is a Target superheat degree parameter; c1 is the base target temperature, which may be set at 9 ℃, although other values are possible; c2 is the difference between the current ambient temperature and the preset target temperature.
S212: and judging whether the target superheat degree parameter meets a first preset condition or not.
It should be noted that the first predetermined condition may be a target temperature range, such as-1 to 1 ℃. Judging whether the target superheat degree parameter meets a first preset condition refers to judging whether a reference difference value between the target superheat degree parameter and the actual low-pressure liquid temperature is in the target temperature range. If the reference difference value is in the target temperature interval, the temperature of the low-pressure liquid needs to be independently adjusted; if not, no control is required.
It should be noted that, the first embodiment can be referred to as a manner of obtaining the actual low-pressure liquid temperature, and the description of this embodiment is omitted here.
S213: and when the target superheat degree parameter meets a first preset condition, searching a corresponding second control parameter from a second preset control parameter table according to the target superheat parameter, and adjusting the opening degree of the target throttling device according to the second control parameter.
It should be noted that if the reference difference between the target superheat parameter and the actual low-pressure liquid temperature is not in the interval, it indicates that the desired temperature of the low-pressure liquid is far from the actual temperature, and the adjustment is required.
In the concrete implementation, taking the refrigeration mode as an example, the throttling control is performed by considering the temperature value of the low-pressure liquid input by the indoor heat exchanger. Assuming that the current ambient temperature is 30 ℃ and the preset target temperature is 26 ℃, the target superheat parameter is 13 ℃ according to the above. If the temperature value of the low-pressure liquid input by the indoor heat exchanger is detected to be 15 ℃, the reference difference value is 2 ℃. Because the reference difference value is between-1 ℃ and 1 ℃, the temperature value of the low-pressure liquid does not need to be adjusted, and the superheat degree can be controlled.
It should be noted that different control parameters may be set according to different reference differences. As shown in the following table:
it should be noted that the reference difference value may also correspond to other adjustment step values and adjustment period values, which is not limited in this embodiment.
And when the target superheat degree parameter does not meet a first preset condition, executing the step of adjusting the opening degree of the target throttling device according to the first control parameter.
It should be noted that if the reference difference between the target superheat parameter and the actual low-pressure liquid temperature is within the interval, it indicates that the desired temperature of the low-pressure liquid is close to the actual temperature, and no adjustment is required.
In the concrete implementation, taking the refrigeration mode as an example, the throttling control is performed by considering the temperature value of the low-pressure liquid input by the indoor heat exchanger. Assuming that the current ambient temperature is 30 ℃ and the preset target temperature is 26 ℃, the target superheat parameter is 13 ℃ according to the above. If the temperature value of the low-pressure liquid input by the indoor heat exchanger is detected to be 13 ℃, the reference difference value is 0 ℃. Since the reference difference is between-1 ℃ and 1 ℃, it is indicated that independent adjustment of the temperature value of the low-pressure liquid is not required, and the superheat degree parameter control as described in the first embodiment can be performed.
In the second embodiment, before the adjustment is performed according to the superheat degree parameter, the current environment temperature of the indoor heat exchanger is detected, the expected temperature value of the low-pressure liquid input by the indoor heat exchanger is determined according to the current environment temperature, and the opening degree of the target throttling device is adjusted according to the difference value between the actual temperature value and the expected temperature value. This embodiment has guaranteed that the low pressure liquid temperature of indoor heat exchanger input satisfies the expectation temperature that current environment corresponds before according to superheat degree parameter control to make superheat degree parameter control can have good temperature basis, and then improved the control by temperature change effect.
Referring to fig. 5, fig. 5 is a flowchart illustrating a throttling control method for an air conditioning system according to a third embodiment of the present invention, and the throttling control method for an air conditioning system according to the third embodiment of the present invention is proposed based on the first embodiment and the second embodiment. The present embodiment is explained based on the first embodiment.
In the third embodiment, before step S30, the method further includes:
s220: and acquiring an exhaust temperature value of the compressor corresponding to the target throttling device and a fifth temperature value of the middle area of the indoor heat exchanger.
It should be noted that, in order to ensure the normal operation of the air conditioning system, it is also necessary to avoid the system abnormality caused by the over-high discharge of the compressor. Therefore, in the present embodiment, in order to avoid the system exhaust deterioration caused by the adjustment of the target throttle device, which may cause the system to overheat and affect the exchange effect of the indoor heat exchanger, the exhaust state of the system is also detected before the adjustment.
Referring to fig. 2, in the present embodiment, the exhaust temperature value of the compressor is acquired by the exhaust bulb 1004. A fifth temperature value of the middle area of the indoor heat exchanger can be obtained through the heat exchanger middle bulb 3002.
S221: and judging whether the exhaust temperature value and the fifth temperature value meet a second preset condition.
It should be noted that the second preset condition may be a temperature threshold. The determining whether the exhaust temperature value and the fifth temperature value satisfy a second preset condition may be determining whether the exhaust temperature value is greater than a first preset threshold value, and whether the fifth temperature value is greater than a second preset threshold value. Specifically, the first preset threshold may be set to 97 ℃, and the second preset threshold may be set to 18 ℃. Of course, the preset threshold may be other values, which is not limited in this embodiment.
It should be noted that, in the present embodiment, the cooling mode is taken as an example for description, and therefore, the second preset condition may further include determining whether the current operation mode of the air conditioning system is the cooling mode.
S222: and when the exhaust temperature value and the fifth temperature value meet the second preset condition, controlling the target throttling device to enter an exhaust control mode.
It can be understood that when the exhaust temperature value and the fifth temperature value satisfy the second preset condition, it indicates that the air conditioning system is in an abnormal state currently, and the exhaust of the air conditioning system is not required to be controlled. The exhaust control mode is that the throttling device connected with the operated indoor heat exchanger in the branch box is controlled according to preset exhaust control parameters. Specifically, the preset exhaust gas control parameter may be such that the throttle opening is first increased by 50 steps and then increased by 40 steps every 60 seconds. Of course, other embodiments are also possible, and the present embodiment is not limited to this.
It should be noted that, after entering the exhaust gas control mode, when it is detected that the exhaust gas temperature value or the fifth temperature value satisfies the third preset condition, indicating that the air conditioning system has departed from the abnormal state, the control manner as in the foregoing embodiments may be executed. Specifically, the third preset condition may be that the exhaust temperature value is less than 87 ℃ for 5 seconds, or the air conditioning system exits the cooling mode.
And when the exhaust temperature value and the fifth temperature value do not meet the second preset condition, executing the step of adjusting the opening degree of the target throttling device according to the first control parameter.
It can be understood that when the exhaust temperature value and the fifth temperature value do not satisfy the second preset condition, it indicates that no abnormal state occurs in the air conditioning system currently, and the exhaust of the air conditioning system does not need to be controlled. The control manner as in the foregoing embodiments may be performed.
In the third embodiment, the exhaust temperature of the air conditioning system is detected, when the air conditioning system is in an overheat state, the target throttling device is controlled to enter an exhaust control mode, and the system temperature is reduced, so that the problem that the heat exchange effect of the indoor heat exchanger is poor due to overheat of the system is avoided, and the temperature control stability of the indoor heat exchanger is improved.
In addition, to achieve the above object, an embodiment of the present invention further provides a storage medium, where an air conditioning system throttling control program is stored, and the air conditioning system throttling control program, when executed by a processor, implements the steps of the air conditioning system throttling control method as described above.
Since the storage medium adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
In addition, in order to achieve the above purpose, an embodiment of the present invention further provides a throttle control device for an air conditioning system. Referring to fig. 6, fig. 6 is a block diagram illustrating a throttle control apparatus of an air conditioning system according to a first embodiment of the present invention.
In this embodiment, the air conditioning system throttle control device includes:
and the parameter acquisition module 10 is used for acquiring the superheat degree parameter of the indoor heat exchanger.
It should be noted that the target throttle device may be the electronic expansion valve 2001 described above. Usually, the branch box is connected with a plurality of indoor units, and when the throttling control is executed, whether the indoor units need to be judged is needed, so that the waste of control resources caused by the control of the indoor units which are not operated is avoided. Meanwhile, when the indoor unit starts to operate, the temperature change is large, and the throttle control needs to be performed after waiting for a period of time, so that the control accuracy is improved. In the concrete implementation, the throttling control can be executed after the indoor unit is started and operates for 10 minutes.
It should be noted that the superheat degree parameter is used for representing the heat exchange requirement of indoor heat exchange. Taking the refrigeration mode of the air conditioning system as an example, the indoor heat exchanger receives low-pressure liquid from the branch box and evaporates to obtain low-pressure gas. Assuming that the temperature of the low-pressure liquid is 12 ℃, and the temperature of the evaporated low-pressure gas is 16 ℃; the superheat parameter of the indoor heat exchanger is 4 deg.c. The evaporation effect of the indoor heat exchanger directly influences the heat exchange capacity of the indoor heat exchanger, and when the superheat degree parameter is larger, the larger the evaporation degree is, the smaller the superheat degree parameter is, and the smaller the evaporation degree is. Generally, in order to ensure the heat exchange capability of the indoor heat exchanger, the superheat degree parameter should not be too large or too small, and can be controlled to be about 2 ℃. The actual control parameters at present are different according to different indoor heat exchangers, and the present embodiment is not limited to this.
It is understood that the superheat parameter may be a temperature difference between the high pressure liquid and the high pressure gas when the air conditioning system is in a heating mode.
In the concrete implementation, the step of obtaining the superheat degree parameter of the indoor heat exchanger comprises the following steps: acquiring a first temperature value at the outlet side of the indoor heat exchanger; acquiring a second temperature value of the inlet side of the indoor heat exchanger; and calculating a first temperature difference value between the second temperature value and the first temperature value, and taking the first temperature difference value as a superheat degree parameter.
It should be noted that, in the cooling mode, the first temperature value on the outlet side of the indoor heat exchanger may represent the temperature of the low-pressure gas. Referring to fig. 2, in the present embodiment, a first temperature value on the outlet side of the indoor heat exchanger is acquired by the manifold intake side bulb 2003.
It should be noted that, in the cooling mode, the first temperature value at the outlet side of the indoor heat exchanger may represent the temperature of the low-pressure liquid. Referring to fig. 2, in the present embodiment, a second temperature value at the inlet side of the indoor heat exchanger is obtained by installing a temperature sensing bulb 2002 at the liquid outlet side of the branch box or a temperature sensing bulb 3002 at the middle part of the heat exchanger on the air pipe of the branch box.
In order to obtain a more accurate temperature of the low-pressure liquid, in the present embodiment, the temperature of the low-pressure liquid is collected at both the outlet side of the throttling device and the middle portion of the indoor heat exchanger, and the minimum value between the two is used as the second temperature value at the inlet side of the indoor heat exchanger. For example, if the temperature detected by the temperature sensing bulb 2002 at the liquid outlet side of the branch box is 11 ℃; the temperature detected by the middle bulb 3002 of the heat exchanger is 10.5 ℃, and the second temperature value at the inlet side of the indoor heat exchanger is 10.5 ℃.
It should be noted that the first temperature difference between the first corrected temperature value and the second temperature value has a positive value and a negative value, and the positive value and the negative value have different meanings according to different calculation manners. Specifically, if the first corrected temperature value is subtracted from the second temperature value, the larger the first temperature difference is, the higher the evaporation degree is; if the second temperature value is less than the first corrected temperature value, the opposite is true.
And the control parameter generation module 20 is used for determining a first control parameter according to the superheat degree parameter.
It should be noted that, when the superheat degree parameter is too large, it indicates that the evaporation of the indoor heat exchanger is excessive, and the flow rate of the input low-pressure liquid needs to be increased; when the superheat parameter is too small, the evaporation of the indoor heat exchanger is insufficient, and the flow of the input low-pressure liquid needs to be reduced. And determining control parameters of the target throttling device according to different superheat degree parameters.
In a specific implementation, the step of determining the first control parameter according to the superheat degree parameter includes: searching the corresponding adjusting step number and the adjusting period from a first preset control parameter table according to the superheat degree parameter; and taking the adjusting step number and the adjusting period as first control parameters.
It should be noted that the first preset control parameter table may also be added to the operation configuration parameters of the branch box, and when determining the control parameters, the first preset control parameter table is locally obtained to search, so as to obtain the corresponding control parameters. Of course, the first preset control parameter table may also exist in the server, and the control device may obtain the first preset control parameter table from the server for searching; the server may also search for the control parameter and send the control parameter to the control device, which is not limited in this embodiment.
To more clearly illustrate the relationship between the superheat parameter and the control parameter, the present embodiment provides an example of a first preset control parameter table. As shown in the following table:
it should be noted that the superheat parameter may also correspond to other adjustment step values and adjustment period values, which is not limited in this embodiment.
And the control module 30 is used for adjusting the opening degree of the target throttling device according to the first control parameter.
It can be understood that, by adjusting the opening degree of the target throttling device, the flow rate of the low-pressure liquid input by the corresponding indoor heat exchanger can be adjusted, so that the evaporation effect of the indoor heat exchanger can be adjusted.
In the embodiment, the superheat degree parameter of the indoor heat exchanger is obtained; determining a first control parameter according to the superheat degree parameter; and adjusting the opening degree of the target throttling device according to the first control parameter. According to the invention, the actual heat exchange requirement of the indoor heat exchanger is monitored by acquiring the superheat degree parameter of the indoor heat exchanger, and the throttling device is controlled according to the superheat degree parameter, so that the heat exchange capability of the indoor heat exchanger is ensured to be matched with the actual heat exchange requirement, and the system energy efficiency is improved.
In an embodiment, the throttling control device of the air conditioning system further includes a target temperature control module, where the target temperature control module is configured to obtain a current ambient temperature of an environment where the indoor heat exchanger is located; determining a target superheat degree parameter according to a preset target temperature and the current environment temperature; judging whether the target superheat degree parameter meets a first preset condition or not; and when the target superheat degree parameter does not meet a first preset condition, executing the step of adjusting the opening degree of the target throttling device according to the first control parameter.
In an embodiment, the target temperature control module is further configured to, when the target superheat degree parameter meets a first preset condition, look up a corresponding second control parameter from a second preset control parameter table according to the target superheat parameter; and adjusting the opening degree of the target throttling device according to the second control parameter.
In an embodiment, the throttling control device of the air conditioning system further comprises an exhaust control module, and the exhaust control module is used for acquiring an exhaust temperature value of the compressor corresponding to the target throttling device and a fifth temperature value of the middle area of the indoor heat exchanger; judging whether the exhaust temperature value and the fifth temperature value meet a second preset condition or not; and when the exhaust temperature value and the fifth temperature value do not meet the second preset condition, executing the step of adjusting the opening degree of the target throttling device according to the first control parameter.
In an embodiment, the exhaust gas control module is further configured to control the target throttling device to enter an exhaust gas control mode when the exhaust gas temperature value and the fifth temperature value satisfy the second preset condition.
Other embodiments or specific implementation manners of the throttle control device of the air conditioning system according to the present invention may refer to the above method embodiments, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order, but rather the words first, second, third, etc. are to be interpreted as names.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g., a Read Only Memory (ROM)/Random Access Memory (RAM), a magnetic disk, an optical disk), and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The throttling control method of the air conditioning system is characterized by comprising the following steps:
acquiring superheat degree parameters of an indoor heat exchanger;
determining a first control parameter according to the superheat degree parameter; and the number of the first and second groups,
and adjusting the opening degree of the target throttling device according to the first control parameter.
2. The throttle control method of an air conditioning system as set forth in claim 1, wherein the step of obtaining a superheat parameter of the indoor heat exchanger includes:
acquiring a first temperature value at the outlet side of the indoor heat exchanger;
acquiring a second temperature value of the inlet side of the indoor heat exchanger; and the number of the first and second groups,
and calculating a first temperature difference value between the second temperature value and the first temperature value, and taking the first temperature difference value as a superheat degree parameter.
3. The throttle control method of an air conditioning system according to any one of claims 1-2, wherein the step of determining the first control parameter based on the superheat parameter comprises:
searching the corresponding adjusting step number and the adjusting period from a first preset control parameter table according to the superheat degree parameter; and the number of the first and second groups,
and taking the adjusting step number and the adjusting period as first control parameters.
4. The air conditioning system throttle control method according to any one of claims 1-2, characterized in that, prior to the step of adjusting the opening degree of the target throttle device in accordance with the first control parameter, further comprising:
acquiring the current environment temperature of the environment where the indoor heat exchanger is located;
determining a target superheat degree parameter according to a preset target temperature and the current environment temperature;
judging whether the target superheat degree parameter meets a first preset condition or not; and the number of the first and second groups,
and when the target superheat degree parameter does not meet a first preset condition, executing the step of adjusting the opening degree of the target throttling device according to the first control parameter.
5. The throttle control method of an air conditioning system of claim 4, wherein the step of determining whether the target superheat parameter meets a first preset condition is followed by further comprising:
when the target superheat degree parameter meets a first preset condition, searching a corresponding second control parameter from a second preset control parameter table according to the target superheat parameter; and the number of the first and second groups,
and adjusting the opening degree of the target throttling device according to the second control parameter.
6. The air conditioning system throttle control method according to any one of claims 1-2, characterized in that, prior to the step of adjusting the opening degree of the target throttle device in accordance with the first control parameter, further comprising:
acquiring an exhaust temperature value of a compressor corresponding to the target throttling device and a fifth temperature value of a middle area of the indoor heat exchanger;
judging whether the exhaust temperature value and the fifth temperature value meet a second preset condition or not; and the number of the first and second groups,
and when the exhaust temperature value and the fifth temperature value do not meet the second preset condition, executing the step of adjusting the opening degree of the target throttling device according to the first control parameter.
7. The air conditioning system throttle control method according to claim 6, wherein after the step of determining whether the exhaust temperature value and the fifth temperature value satisfy a second preset condition, further comprising:
and when the exhaust temperature value and the fifth temperature value meet the second preset condition, controlling the target throttling device to enter an exhaust control mode.
8. An air conditioning system throttle control apparatus, characterized by comprising: a memory, a processor, and an air conditioning system throttle control program stored on the memory and executable on the processor, the air conditioning system throttle control program when executed by the processor implementing the steps of the air conditioning system throttle control method of any of claims 1-7.
9. A storage medium having stored thereon an air conditioning system throttle control program, the air conditioning system throttle control program when executed by a processor implementing the steps of the air conditioning system throttle control method according to any one of claims 1 to 7.
10. An air conditioning system throttle control apparatus, characterized by comprising:
the parameter acquisition module is used for acquiring superheat degree parameters of the indoor heat exchanger;
the control parameter generation module is used for determining a first control parameter according to the superheat degree parameter; and the number of the first and second groups,
and the control module is used for adjusting the opening degree of the target throttling device according to the first control parameter.
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