CN116067039A - Control method and device of fixed-frequency heat pump unit and fixed-frequency heat pump unit - Google Patents
Control method and device of fixed-frequency heat pump unit and fixed-frequency heat pump unit Download PDFInfo
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- CN116067039A CN116067039A CN202211649535.2A CN202211649535A CN116067039A CN 116067039 A CN116067039 A CN 116067039A CN 202211649535 A CN202211649535 A CN 202211649535A CN 116067039 A CN116067039 A CN 116067039A
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- 230000002596 correlated effect Effects 0.000 claims description 11
- 238000010257 thawing Methods 0.000 abstract description 10
- 238000004590 computer program Methods 0.000 description 8
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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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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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Abstract
The application provides a control method and device of a fixed-frequency heat pump unit and the fixed-frequency heat pump unit. The method comprises the following steps: under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, acquiring a first temperature variation and a second temperature variation in a preset time period, wherein the first temperature variation is the variation of the tube temperature of the indoor heat exchanger, and the second temperature variation is the variation of the exhaust temperature of the compressor; and regulating the flow of the refrigerant in the pipeline of the indoor heat exchanger according to the magnitude relation between the first temperature variation and the second temperature variation so as to maintain the pipe temperature of the indoor heat exchanger within a preset temperature range. The scheme realizes that the defrosting phenomenon can not occur even if the working condition of the fixed-frequency heat pump unit is the maximum heating working condition.
Description
Technical Field
The application relates to the field of fixed-frequency heat pump units, in particular to a control method and device of a fixed-frequency heat pump unit, a computer readable storage medium and a fixed-frequency heat pump unit.
Background
At present, when the voltage of the fixed-frequency unit is lower under the maximum heating condition, if an alternating current motor is used, the rotating speed of the indoor unit is lower, and the air quantity is smaller. When heating, the temperature of the indoor heat exchanger tube is high, and the temperature of the indoor heat exchanger tube is easy to be overhigh.
When the tube temperature of the indoor heat exchanger is high, the common practice is to pause the external fan first. If the indoor heat exchanger tube temperature is slow in reducing speed, the outer fan is long in pause time, defrosting is easy to occur, liquid return risks exist at the moment, and defrosting occurs frequently when a user needs to heat, so that user experience is affected.
Disclosure of Invention
The main object of the present application is to provide a control method and apparatus for a fixed frequency heat pump unit, a computer readable storage medium and a fixed frequency heat pump unit, so as to solve the problem that the fixed frequency heat pump unit is prone to defrosting under the maximum heating condition 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 a fixed frequency heat pump unit, including: under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, acquiring a first temperature variation and a second temperature variation in a preset time period, wherein the first temperature variation is the variation of the tube temperature of the indoor heat exchanger, and the second temperature variation is the variation of the exhaust temperature of the compressor; and adjusting the flow of the refrigerant in the pipeline of the indoor heat exchanger according to the magnitude relation between the first temperature variation and the second temperature variation so as to maintain the temperature of the pipeline of the indoor heat exchanger within a preset temperature range.
Optionally, according to the magnitude relation between the first temperature variation and the second temperature variation, the flow rate of the refrigerant in the indoor heat exchanger pipeline is adjusted, so that the indoor heat exchanger pipeline temperature is maintained within a preset temperature range, and the method comprises the following steps: determining a first adjustment factor according to the difference between the first temperature variation and the second temperature variation; and adopting the first regulating factor to regulate the flow of the refrigerant in the indoor heat exchanger pipeline so as to maintain the temperature of the indoor heat exchanger pipeline within the preset temperature range.
Optionally, the first adjustment factor is an opening degree of the electronic expansion valve, and the determining the first adjustment factor according to a difference between the first temperature variation and the second temperature variation includes: determining that the opening of the electronic expansion valve is a first constant opening under the condition that the difference value between the first temperature variation and the second temperature variation is smaller than or equal to a preset difference value; and determining that the opening of the electronic expansion valve is positively correlated with the difference value under the condition that the difference value of the first temperature variation and the second temperature variation is larger than the preset difference value.
Optionally, according to the magnitude relation between the first temperature variation and the second temperature variation, the flow rate of the refrigerant in the indoor heat exchanger pipeline is adjusted, so that the indoor heat exchanger pipeline temperature is maintained within a preset temperature range, and the method comprises the following steps: determining a second adjustment factor according to the ratio of the first temperature variation to the second temperature variation; and adopting the second regulating factor to regulate the flow of the refrigerant in the indoor heat exchanger pipeline so as to maintain the temperature of the indoor heat exchanger pipeline within the preset temperature range.
Optionally, the second adjustment factor is an opening degree of the electronic expansion valve, and the determining the second adjustment factor according to a ratio of the first temperature variation to the second temperature variation includes: determining that the opening of the electronic expansion valve is a second constant opening under the condition that the ratio of the first temperature variation to the second temperature variation is smaller than or equal to a preset ratio; and determining that the opening of the electronic expansion valve is positively correlated with the ratio under the condition that the ratio of the first temperature variation to the second temperature variation is larger than the preset ratio.
Optionally, the second adjustment factor is an opening degree of an electronic expansion valve, and the adjusting the refrigerant flow in the indoor heat exchanger pipeline by adopting the second adjustment factor, so that the indoor heat exchanger pipeline temperature is maintained within the preset temperature range, includes: and adjusting the opening of the electronic expansion valve to adjust the flow of the refrigerant in the pipeline of the indoor heat exchanger so as to maintain the temperature of the pipeline of the indoor heat exchanger within the preset temperature range.
Optionally, in a case where the ratio of the first temperature variation amount to the second temperature variation amount is greater than the preset ratio, determining that the opening of the electronic expansion valve is positively correlated with the ratio includes: determining the opening degree of the electronic expansion valve by adopting a formula op=a×tw+b×tn+k×d, wherein OP represents the opening degree of the electronic expansion valve, a represents an outdoor environment temperature coefficient, tw represents an outdoor environment temperature, B represents an indoor environment temperature coefficient, tn represents an indoor environment temperature, K represents the ratio, and D represents a compensation opening degree.
According to another aspect of the present application, there is provided a control device for a fixed frequency heat pump unit, including: the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a first temperature variation and a second temperature variation in a preset time period under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, the first temperature variation is the variation of the tube temperature of the indoor heat exchanger, and the second temperature variation is the variation of the exhaust temperature of the compressor; and the adjusting unit is used for adjusting the flow of the refrigerant in the pipeline of the indoor heat exchanger according to the magnitude relation between the first temperature variation and the second temperature variation so as to maintain the temperature of the pipeline of the indoor heat exchanger within a preset temperature range.
According to still another aspect of the present application, there is provided a computer readable storage medium, where the computer readable storage medium includes a stored program, and when the program runs, 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 a fixed frequency heat pump unit including: the apparatus comprises one or more processors, a memory, a display device, 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 means of the technical scheme, under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, the first temperature variation and the second temperature variation in the preset time period are obtained, and the refrigerant flow in the indoor heat exchanger pipeline is regulated according to the magnitude relation between the first temperature variation and the second temperature variation, so that the indoor heat exchanger pipeline temperature is maintained in the preset temperature range. Therefore, even if the working condition of the constant-frequency heat pump unit is the maximum heating working condition, the defrosting phenomenon can not occur.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 shows a flow chart of a control method of a fixed frequency heat pump unit according to the present application;
FIG. 2 is a flow chart illustrating a control method of a specific fixed frequency heat pump unit according to the present application;
fig. 3 shows a schematic diagram of a control device of a fixed frequency heat pump unit according to the present application.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, 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 one of ordinary skill in the art based on the embodiments herein 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 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 present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Furthermore, in the description and in the claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
For convenience of description, the following will describe some terms or terms related to the embodiments of the present application:
maximum heating working condition: the maximum load heating working condition specified in the current product standard is 24 ℃ per 18 ℃ in the outdoor environment, and the indoor return air temperature is 27 ℃.
As described in the background art, in the prior art, the fixed-frequency heat pump unit is easy to defrost under the condition of high-load heating, and in order to solve the problem that the fixed-frequency heat pump unit is easy to defrost under the condition of high-load heating, the embodiment of the application provides a control method and a device of the fixed-frequency heat pump unit, a computer readable storage medium and the fixed-frequency heat pump unit.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
According to an embodiment of the present invention, there is provided an embodiment of a control method of a fixed frequency heat pump unit, it should be noted that the steps shown in the flowchart of the drawings may be performed 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 performed in an order different from that herein.
Fig. 1 is a flowchart of a control method of a fixed frequency heat pump unit according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:
step S101, under the condition that the working condition of a fixed-frequency heat pump unit is the maximum heating working condition, acquiring a first temperature variation and a second temperature variation in a preset time period, wherein the first temperature variation is the variation of the tube temperature of an indoor heat exchanger, and the second temperature variation is the variation of the exhaust temperature of a compressor;
specifically, the preset time period may be 10min, 15min, 20min, or the like.
For example, the maximum heating condition entering the condition of the fixed frequency heat pump unit is: detecting a set mode of the frequency-measuring heat pump unit, detecting an outdoor environment temperature after the set mode is detected to be a heating mode, and entering a maximum heating control mode after the outdoor environment temperature is detected to be more than or equal to T ℃ and is started, wherein the T ℃ can be 18 ℃, 20 ℃ and 22 ℃.
Step S102, according to the magnitude relation between the first temperature variation and the second temperature variation, the flow of the refrigerant in the indoor heat exchanger pipeline is regulated so as to maintain the temperature of the indoor heat exchanger pipeline within a preset temperature range.
Specifically, the preset temperature range may be 38 ℃ to 42 ℃.
In an alternative scheme, step S102, according to the magnitude relation between the first temperature variation and the second temperature variation, adjusts the flow rate of the refrigerant in the indoor heat exchanger pipeline, so as to maintain the temperature of the indoor heat exchanger pipeline within a preset temperature range, including:
step S1021, determining a first adjustment factor according to the difference between the first temperature variation and the second temperature variation;
the size of the first adjusting factor is determined according to the size of the difference value, so that the accurate adjustment of the tube temperature of the indoor heat exchanger is realized.
Step S1022, adjusting the refrigerant flow in the indoor heat exchanger pipeline by using the first adjustment factor, so that the indoor heat exchanger pipeline temperature is maintained within the preset temperature range.
In an alternative, step S1021, the first adjustment factor is an opening degree of the electronic expansion valve, and determining the first adjustment factor according to a difference between the first temperature variation and the second temperature variation includes:
step S10211, determining that the opening of the electronic expansion valve is a first constant opening when the difference between the first temperature variation and the second temperature variation is smaller than or equal to a preset difference;
specifically, since the typical unit electronic expansion valve has an adjustable range of 0 to 500, the preset difference may be set to 100, 200, 300, or 400 in this example.
Specifically, the first constant opening degree of the electronic expansion valve is a range of opening degrees approximately at the time of steady control of the electronic expansion valve, and may be set to 200, 300, or the like, wherein the value is set to be the most appropriate intermediate value of the flow rate of the electronic expansion valve).
Step S10212, when the difference between the first temperature variation and the second temperature variation is greater than the preset difference, determining that the opening of the electronic expansion valve is positively correlated with the difference.
That is, the larger the variation of the tube temperature of the heat exchanger is, the larger the opening degree of the electronic expansion valve is required to be opened, so as to reduce the tube temperature of the indoor heat exchanger.
In an alternative scheme, step S102, according to the magnitude relation between the first temperature variation and the second temperature variation, adjusts the flow rate of the refrigerant in the indoor heat exchanger pipeline, so as to maintain the temperature of the indoor heat exchanger pipeline within a preset temperature range, including:
determining a second adjustment factor according to the ratio of the first temperature variation to the second temperature variation;
and regulating the flow of the refrigerant in the pipeline of the indoor heat exchanger by adopting the second regulating factor so as to maintain the temperature of the pipeline of the indoor heat exchanger within the preset temperature range.
Further, the second adjustment factor is an opening of the electronic expansion valve, and the determining the second adjustment factor according to a ratio of the first temperature variation to the second temperature variation includes:
determining that the opening of the electronic expansion valve is a second constant opening when the ratio of the first temperature variation to the second temperature variation is less than or equal to a preset ratio;
specifically, the preset ratio may be set to 100, 200, 300, or 400, which may be determined at the time of development.
Specifically, the second constant opening degree of the electronic expansion valve is 200, 260, or 300.
And determining that the opening of the electronic expansion valve is positively correlated with the ratio when the ratio of the first temperature variation to the second temperature variation is greater than the preset ratio.
That is, the larger the variation of the tube temperature of the heat exchanger is, the larger the opening degree of the electronic expansion valve is required to be opened, so as to reduce the tube temperature of the indoor heat exchanger.
In a specific embodiment, the second adjustment factor is an opening degree of an electronic expansion valve, and the adjusting the refrigerant flow in the indoor heat exchanger pipeline by using the second adjustment factor, so that the indoor heat exchanger pipeline temperature is maintained within the preset temperature range, includes:
and adjusting the opening of the electronic expansion valve to adjust the flow of the refrigerant in the indoor heat exchanger pipeline so as to maintain the temperature of the indoor heat exchanger pipeline within the preset temperature range.
Specifically, the electronic expansion valve is arranged at the inlet of the indoor heat exchanger pipeline, and the opening degree of the electronic expansion valve is controlled to control the refrigerant flow in the indoor heat exchanger pipeline.
In addition, in some embodiments, there is no mandatory requirement for the installation location of the electronic expansion valve, after the condenser and before the heat exchanger.
In a specific embodiment, when the ratio of the first temperature variation to the second temperature variation is greater than the preset ratio, determining that the opening of the electronic expansion valve is positively correlated with the ratio includes:
the opening degree of the electronic expansion valve is determined by adopting the formula op=a×tw+b×tn+k×d, where OP represents the opening degree of the electronic expansion valve, a represents an outdoor environment temperature coefficient, tw represents an outdoor environment temperature, B represents an indoor environment temperature coefficient, tn represents an indoor environment temperature, K represents the ratio, and D represents a compensation opening degree.
In a specific embodiment, the specific manner of determining the outdoor environment temperature coefficient is: the unit is determined experimentally during development, and then the coefficients are determined. For example: setting three valve steps with different outdoor environment temperatures, and calculating according to an equation, wherein three unknowns exist in the equation;
in a specific embodiment, the specific manner of determining the indoor environment temperature coefficient is as follows: the unit is determined experimentally during development, and then the coefficients are determined. For example: setting three valve steps with different outdoor environment temperatures, and calculating according to an equation, wherein three unknowns exist in the equation;
in a specific embodiment, the specific manner of determining the compensation opening is: the unit is determined through experiments during development, and then the compensation opening degree is determined. For example: setting three valve steps with different outdoor environment temperatures, and calculating according to an equation, wherein three unknowns exist in the equation;
according to the control method of the fixed-frequency heat pump unit, under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, the first temperature variation and the second temperature variation in the preset time period are obtained, and the refrigerant flow in the indoor heat exchanger pipeline is regulated according to the magnitude relation of the first temperature variation and the second temperature variation, so that the indoor heat exchanger pipeline temperature is maintained in the preset temperature range. Therefore, even if the working condition of the constant-frequency heat pump unit is the maximum heating working condition, the defrosting phenomenon can not occur.
A more specific embodiment is shown in fig. 2, comprising the steps of:
step S1: entering a heating mode;
step S2: detecting the current outdoor environment temperature, determining whether the current outdoor environment temperature is higher than 20 ℃, if yes, entering a step S4, and if not, entering a step S3;
step S3: entering a conventional control mode;
step S4: entering a maximum heating control mode;
step S5: acquiring the variation of the tube temperature of the indoor heat exchanger and the variation of the exhaust temperature of the compressor;
step S6: acquiring the ratio of the variable quantity of the tube temperature of the indoor heat exchanger to the variable quantity of the exhaust temperature of the compressor;
step S7: under the condition that the ratio is larger than a preset ratio, entering a high temperature prevention control mode; and under the condition that the ratio is smaller than or equal to a preset ratio, entering a maintenance control mode.
The embodiment of the application also provides a fixed-frequency heat pump unit control device, and it is to be noted that the fixed-frequency heat pump unit control device of the embodiment of the application can be used for executing the fixed-frequency heat pump unit control method provided by the embodiment of the application. The following describes a control device of a fixed-frequency heat pump unit provided in an embodiment of the present application.
Fig. 3 is a schematic diagram of a control device of a fixed-frequency heat pump unit according to an embodiment of the present application. As shown in fig. 3, the apparatus includes:
an obtaining unit 31, configured to obtain a first temperature variation and a second temperature variation in a preset period of time when the working condition of the fixed frequency heat pump unit is a maximum heating working condition, where the first temperature variation is a variation of a tube temperature of the indoor heat exchanger, and the second temperature variation is a variation of an exhaust temperature of the compressor;
and the adjusting unit 32 is configured to adjust the flow rate of the refrigerant in the indoor heat exchanger pipeline according to the magnitude relation between the first temperature variation and the second temperature variation, so that the indoor heat exchanger pipeline temperature is maintained within a preset temperature range.
According to the fixed-frequency heat pump unit control device, the acquisition unit acquires the first temperature variation and the second temperature variation in the preset time period under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, and the adjustment unit adjusts the refrigerant flow in the pipeline of the indoor heat exchanger according to the magnitude relation between the first temperature variation and the second temperature variation, so that the pipe temperature of the indoor heat exchanger is maintained in the preset temperature range. Therefore, even if the working condition of the constant-frequency heat pump unit is the maximum heating working condition, the defrosting phenomenon can not occur.
In some embodiments, the adjusting unit includes a first determining module and a first adjusting module, where the first determining module is configured to determine a first adjusting factor according to a difference between the first temperature variation and the second temperature variation; the first adjusting module is used for adjusting the refrigerant flow in the indoor heat exchanger pipeline by adopting the first adjusting factor so as to maintain the indoor heat exchanger pipeline temperature within the preset temperature range. The size of the first adjusting factor is determined according to the size of the difference value, so that the accurate adjustment of the tube temperature of the indoor heat exchanger is realized.
In some embodiments, the first adjustment factor is an opening degree of the electronic expansion valve, and the first determining module includes a first determining submodule and a second determining submodule, where the first determining submodule is configured to determine that the opening degree of the electronic expansion valve is a first constant opening degree if a difference between the first temperature change amount and the second temperature change amount is less than or equal to a preset difference; the second determining submodule is used for determining that the opening of the electronic expansion valve is positively correlated with the difference value when the difference value between the first temperature change value and the second temperature change value is larger than the preset difference value. That is, the larger the variation of the tube temperature of the heat exchanger is, the larger the opening degree of the electronic expansion valve is required to be opened, so as to reduce the tube temperature of the indoor heat exchanger.
In other embodiments, the adjusting unit includes a first determining module and a second adjusting module, where the first determining module is configured to determine a second adjusting factor according to a ratio of the first temperature variation and the second temperature variation; the second adjusting module is used for adjusting the refrigerant flow in the indoor heat exchanger pipeline by adopting the second adjusting factor so as to maintain the indoor heat exchanger pipeline temperature within the preset temperature range.
In other embodiments, the second adjustment factor is an opening degree of the electronic expansion valve, and the first determining module includes a third determining submodule and a fourth determining submodule, where the third determining submodule is configured to determine that the opening degree of the electronic expansion valve is a second constant opening degree when a ratio of the first temperature variation to the second temperature variation is less than or equal to a preset ratio; and the fourth determining submodule is used for determining that the opening of the electronic expansion valve is positively correlated with the ratio when the ratio of the first temperature variation to the second temperature variation is larger than the preset ratio. That is, the larger the variation of the tube temperature of the heat exchanger is, the larger the opening degree of the electronic expansion valve is required to be opened, so as to reduce the tube temperature of the indoor heat exchanger.
In some embodiments, the second adjustment factor is an opening degree of the electronic expansion valve, and the second adjustment module is further configured to: and adjusting the opening of the electronic expansion valve to adjust the flow of the refrigerant in the indoor heat exchanger pipeline so as to maintain the temperature of the indoor heat exchanger pipeline within the preset temperature range.
In some embodiments, the fourth determining submodule is further configured to determine an opening degree of the electronic expansion valve using a formula op=a×tw+b×tn+k×d, where OP represents the opening degree of the electronic expansion valve, a represents an outdoor environment temperature coefficient, tw represents an outdoor environment temperature, B represents an indoor environment temperature coefficient, tn represents an indoor environment temperature, K represents the ratio, and D represents a compensation opening degree.
The fixed-frequency heat pump unit control device comprises a processor and a memory, wherein the acquisition unit, the adjustment unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
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 defrosting of the fixed-frequency heat pump unit under the condition of high-load heating is avoided 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.
According to an embodiment of the present application, there is provided a computer readable storage medium, where the computer readable storage medium includes a stored program, and when the program runs, a device where the computer readable storage medium is controlled to execute the method for controlling a constant frequency heat pump unit.
According to an embodiment of the present application, a processor is provided, where the processor is configured to run a program, and the method for controlling a constant-frequency heat pump unit is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:
step S101, under the condition that the working condition of a fixed-frequency heat pump unit is the maximum heating working condition, acquiring a first temperature variation and a second temperature variation in a preset time period, wherein the first temperature variation is the variation of the tube temperature of an indoor heat exchanger, and the second temperature variation is the variation of the exhaust temperature of a compressor;
step S102, according to the magnitude relation between the first temperature variation and the second temperature variation, the flow of the refrigerant in the indoor heat exchanger pipeline is regulated so as to maintain the temperature of the indoor heat exchanger pipeline within a preset temperature range.
The device herein may be a server, PC, PAD, cell phone, etc.
The present application also provides a computer program product adapted to perform a program initialized with at least the following method steps when executed on a data processing device:
step S101, under the condition that the working condition of a fixed-frequency heat pump unit is the maximum heating working condition, acquiring a first temperature variation and a second temperature variation in a preset time period, wherein the first temperature variation is the variation of the tube temperature of an indoor heat exchanger, and the second temperature variation is the variation of the exhaust temperature of a compressor;
step S102, according to the magnitude relation between the first temperature variation and the second temperature variation, the flow of the refrigerant in the indoor heat exchanger pipeline is regulated so as to maintain the temperature of the indoor heat exchanger pipeline within a preset temperature range.
The application also provides a fixed frequency heat pump unit, include: the apparatus comprises one or more processors, a memory, a display device, 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 described above.
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) According to the control method of the fixed-frequency heat pump unit, under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, the first temperature variation and the second temperature variation in the preset time period are obtained, and the refrigerant flow in the indoor heat exchanger pipeline is regulated according to the magnitude relation of the first temperature variation and the second temperature variation, so that the indoor heat exchanger pipeline temperature is maintained in the preset temperature range. Therefore, even if the working condition of the constant-frequency heat pump unit is the maximum heating working condition, the defrosting phenomenon can not occur.
2) According to the fixed-frequency heat pump unit control device, the acquisition unit acquires the first temperature variation and the second temperature variation in the preset time period under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, and the adjustment unit adjusts the refrigerant flow in the pipeline of the indoor heat exchanger according to the magnitude relation between the first temperature variation and the second temperature variation, so that the pipe temperature of the indoor heat exchanger is maintained in the preset temperature range. Therefore, even if the working condition of the constant-frequency heat pump unit is the maximum heating working condition, the defrosting phenomenon can not occur.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. The control method of the fixed-frequency heat pump unit is characterized by comprising the following steps of:
under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, acquiring a first temperature variation and a second temperature variation in a preset time period, wherein the first temperature variation is the variation of the tube temperature of the indoor heat exchanger, and the second temperature variation is the variation of the exhaust temperature of the compressor;
and adjusting the flow of the refrigerant in the pipeline of the indoor heat exchanger according to the magnitude relation between the first temperature variation and the second temperature variation so as to maintain the temperature of the pipeline of the indoor heat exchanger within a preset temperature range.
2. The method of claim 1, wherein adjusting the flow of refrigerant in the indoor heat exchanger tube to maintain the indoor heat exchanger tube temperature within a preset temperature range based on the magnitude relationship of the first temperature variation and the second temperature variation, comprises:
determining a first adjustment factor according to the difference between the first temperature variation and the second temperature variation;
and adopting the first regulating factor to regulate the flow of the refrigerant in the indoor heat exchanger pipeline so as to maintain the temperature of the indoor heat exchanger pipeline within the preset temperature range.
3. The method of claim 2, wherein the first adjustment factor is an opening degree of an electronic expansion valve, and determining the first adjustment factor based on a difference between the first temperature variation and the second temperature variation comprises:
determining that the opening of the electronic expansion valve is a first constant opening under the condition that the difference value between the first temperature variation and the second temperature variation is smaller than or equal to a preset difference value;
and determining that the opening of the electronic expansion valve is positively correlated with the difference value under the condition that the difference value of the first temperature variation and the second temperature variation is larger than the preset difference value.
4. The method of claim 1, wherein adjusting the flow of refrigerant in the indoor heat exchanger tube to maintain the indoor heat exchanger tube temperature within a preset temperature range based on the magnitude relationship of the first temperature variation and the second temperature variation, comprises:
determining a second adjustment factor according to the ratio of the first temperature variation to the second temperature variation;
and adopting the second regulating factor to regulate the flow of the refrigerant in the indoor heat exchanger pipeline so as to maintain the temperature of the indoor heat exchanger pipeline within the preset temperature range.
5. The method of claim 4, wherein the second adjustment factor is an opening degree of an electronic expansion valve, and determining the second adjustment factor based on a ratio of the first temperature variation and the second temperature variation comprises:
determining that the opening of the electronic expansion valve is a second constant opening under the condition that the ratio of the first temperature variation to the second temperature variation is smaller than or equal to a preset ratio;
and determining that the opening of the electronic expansion valve is positively correlated with the ratio under the condition that the ratio of the first temperature variation to the second temperature variation is larger than the preset ratio.
6. The method of claim 4, wherein the second adjustment factor is an opening degree of an electronic expansion valve, and adjusting a refrigerant flow rate in the indoor heat exchanger tube line with the second adjustment factor so that the indoor heat exchanger tube temperature is maintained within the preset temperature range comprises:
and adjusting the opening of the electronic expansion valve to adjust the flow of the refrigerant in the pipeline of the indoor heat exchanger so as to maintain the temperature of the pipeline of the indoor heat exchanger within the preset temperature range.
7. The method of claim 5, wherein determining that the opening of the electronic expansion valve is positively correlated with the ratio if the ratio of the first temperature variation and the second temperature variation is greater than the preset ratio comprises:
determining the opening degree of the electronic expansion valve by adopting a formula op=a×tw+b×tn+k×d, wherein OP represents the opening degree of the electronic expansion valve, a represents an outdoor environment temperature coefficient, tw represents an outdoor environment temperature, B represents an indoor environment temperature coefficient, tn represents an indoor environment temperature, K represents the ratio, and D represents a compensation opening degree.
8. A constant frequency heat pump unit control device, characterized by comprising:
the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a first temperature variation and a second temperature variation in a preset time period under the condition that the working condition of the fixed-frequency heat pump unit is the maximum heating working condition, the first temperature variation is the variation of the tube temperature of the indoor heat exchanger, and the second temperature variation is the variation of the exhaust temperature of the compressor;
and the adjusting unit is used for adjusting the flow of the refrigerant in the pipeline of the indoor heat exchanger according to the magnitude relation between the first temperature variation and the second temperature variation so as to maintain the temperature of the pipeline of the indoor heat exchanger within a preset temperature 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. A fixed frequency heat pump unit, comprising: one or more processors, a memory, a display device, 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211649535.2A CN116067039A (en) | 2022-12-21 | 2022-12-21 | Control method and device of fixed-frequency heat pump unit and fixed-frequency heat pump unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211649535.2A CN116067039A (en) | 2022-12-21 | 2022-12-21 | Control method and device of fixed-frequency heat pump unit and fixed-frequency heat pump unit |
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| CN116067039A true CN116067039A (en) | 2023-05-05 |
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| CN202211649535.2A Pending CN116067039A (en) | 2022-12-21 | 2022-12-21 | Control method and device of fixed-frequency heat pump unit and fixed-frequency heat pump unit |
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| CN (1) | CN116067039A (en) |
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