CN111829205B - Digital vortex heat pump unit and control method, device and storage medium thereof - Google Patents
Digital vortex heat pump unit and control method, device and storage medium thereof Download PDFInfo
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- CN111829205B CN111829205B CN202010499484.4A CN202010499484A CN111829205B CN 111829205 B CN111829205 B CN 111829205B CN 202010499484 A CN202010499484 A CN 202010499484A CN 111829205 B CN111829205 B CN 111829205B
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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
- 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
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
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Abstract
The invention discloses a digital vortex heat pump unit and a control method, a device and a storage medium thereof. The digital vortex dual-system heat pump unit consists of the digital vortex compressor and the fixed-frequency compressor, and the digital vortex compressor and the fixed-frequency compressor are provided with control logics, so that the control of the fixed-frequency compressor and the digital vortex compressor can be realized, wherein the control of the fixed-frequency compressor can realize coarse adjustment of output temperature, and the control of the digital vortex compressor can realize fine adjustment of output temperature, so that the quick fine adjustment of the output temperature is realized, and when the digital vortex heat pump unit is applied to occasions such as material drying, various drying processes are easy to realize. The invention is widely applied to the technical field of heat pumps.
Description
Technical Field
The invention relates to the technical field of heat pumps, in particular to a digital vortex heat pump unit and a control method, a device and a storage medium thereof.
Background
The existing heat pump unit mostly adopts a fixed-frequency compressor, and can output stable heat, but when the heat pump unit is applied to occasions such as material drying, the temperature of the material is frequently required to be controlled to change in multiple sections so as to realize various drying processes. The existing heat pump unit is difficult to realize fine and rapid temperature control.
Interpretation of terms
Digital scroll compressor: a compressor that employs an axial compliance technique that allows the scroll in a digital scroll compressor to move a very small distance in the axial direction, ensuring that the scroll is always operating with optimal force. Two scrolls in the digital scroll compressor are tightly combined together in any operating environment, so that the digital scroll compressor is ensured to have high energy efficiency ratio. The control cycle period of the digital scroll compressor includes a load period and an unload period. In the load period, the digital scroll compressor works like a conventional scroll compressor to transfer the whole capacity, and the output of the compressor is 100 percent; in the unloading period, due to the flexible design of the compressor, the two scroll plates are slightly separated in the axial direction, no refrigerant passes through the digital scroll compressor any more, and the output of the digital scroll compressor is 0.
Disclosure of Invention
In view of at least one of the above technical problems, the present invention provides a digital vortex heat pump unit, a control method, a control device and a storage medium thereof.
In one aspect, an embodiment of the present invention includes a digital vortex heat pump unit, including:
a fixed-frequency compressor;
a digital scroll compressor;
the temperature measuring module is used for detecting the output temperature of the digital vortex heat pump unit;
the control module is used for controlling the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor according to the interval of the output temperature; the working state comprises opening and closing, and the working duty ratio is the time proportion of the digital scroll compressor working in an unloading state and working in a loading state in one working period.
Further, the controlling the working state of the fixed-frequency compressor and the working duty cycle of the digital scroll compressor according to the interval of the output temperature specifically includes:
determining control parameters according to the interval of the output temperature; the interval is determined by target temperature, loading return difference of the digital scroll compressor and unloading return difference of the digital scroll compressor;
and determining the target working state of the fixed-frequency compressor and the target working duty ratio of the digital scroll compressor according to the control parameters, the current working state of the fixed-frequency compressor and the current working duty ratio of the digital scroll compressor.
Further, the determining a control parameter according to the interval where the output temperature is located specifically includes:
when the output temperature is equal to the target temperature, determining that the control parameter is 0;
when the output temperature is less than or equal to the difference between the target temperature and the loading return difference of the digital scroll compressor and the control parameter of the previous work period is less than or equal to-1, determining that the control parameter is 1;
when the output temperature is less than or equal to the difference between the target temperature and the loading return difference of the digital scroll compressor and the control parameter of the previous working period is greater than or equal to 0, determining that the control parameter is 2;
when the output temperature is greater than or equal to the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is greater than or equal to 1, determining that the control parameter is-1;
when the output temperature is greater than or equal to the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is less than or equal to 0, determining that the control parameter is-2;
when the output temperature is less than the target temperature and greater than the difference between the target temperature and the loading return difference of the digital scroll compressor, and the control parameter of the previous working period is greater than or equal to-1, determining that the control parameter is 1;
when the output temperature is less than the target temperature and greater than the difference between the target temperature and the loading return difference of the digital scroll compressor, and the control parameter of the previous working period is equal to-2, determining that the control parameter is 0;
when the output temperature is greater than the target temperature and less than the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is less than or equal to 1, determining that the control parameter is-1;
and when the output temperature is greater than the target temperature and less than the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is equal to 2, determining that the control parameter is 0.
Further, when the control parameter is greater than 0, determining the target operating state of the fixed-frequency compressor and the target operating duty cycle of the digital scroll compressor according to the control parameter, the current operating state of the fixed-frequency compressor and the current operating duty cycle of the digital scroll compressor, specifically including:
when the current working state is on and the current working duty ratio is 100%, determining that the target working duty ratio is 100%;
when the current working state is on and the current working duty ratio is less than 100%, determining that the target working duty ratio is equal to the sum of the product of the control parameter and 5% and the current working duty ratio;
when the current working state is off and the current working duty ratio is less than 100%, if the control parameter is 2, determining that the target working duty ratio is 100%, and if the control parameter is 1, determining that the target working duty ratio is equal to the sum of the current working duty ratio and 5%;
and when the current working state is closed and the current working duty ratio is equal to 100%, if the control parameter is 2, determining that the target working state is open, and if the control parameter is 1, determining that the target working duty ratio is 100%.
Further, when the control parameter is less than 0, determining the target operating state of the fixed-frequency compressor and the target operating duty cycle of the digital scroll compressor according to the control parameter, the current operating state of the fixed-frequency compressor and the current operating duty cycle of the digital scroll compressor specifically includes:
when the current working state is on, the current working duty ratio is 100%, and if the control parameter is-2, the target working duty ratio is determined to be 0;
when the current working state is on, the current working duty ratio is 0, and the sum of the product of the control parameter and 5% and the current working duty ratio is less than the minimum duty ratio, determining that the target working state is off;
when the current working state is on, the current working duty ratio is 0, and the sum of the product of the control parameter and 5% and the current working duty ratio is greater than or equal to the minimum duty ratio, determining that the target working duty ratio is equal to the sum of the product of the control parameter and 5% and the current working duty ratio;
when the current working duty ratio is larger than the minimum duty ratio and the current working state is closed, determining that the target working duty ratio is equal to the sum of the product of the control parameter and 5% and the current working duty ratio;
and when the current working duty ratio is larger than the minimum duty ratio and the current working state is closed, if the control parameter is-2, determining that the target working state is closed, and if the control parameter is-1, determining that the target working duty ratio is the minimum duty ratio.
Further, when the control parameter is equal to 0, determining the target operating state of the fixed-frequency compressor and the target operating duty cycle of the digital scroll compressor according to the control parameter, the current operating state of the fixed-frequency compressor and the current operating duty cycle of the digital scroll compressor specifically includes:
determining that the target operating duty cycle is equal to the current operating duty cycle.
Further, the controlling the operating state of the fixed-frequency compressor and the operating duty cycle of the digital scroll compressor specifically includes:
and when one working period of the digital scroll compressor is finished, updating the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor.
On the other hand, the embodiment of the invention also comprises a control method of the digital vortex heat pump unit, wherein the digital vortex heat pump unit comprises a fixed-frequency compressor, a digital vortex compressor, a temperature measurement module and a control module, and the control method comprises the following steps:
detecting the output temperature of the digital vortex heat pump unit;
controlling the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor according to the interval of the output temperature; the working state comprises opening and closing, and the working duty ratio is the time proportion of the digital scroll compressor working in an unloading state and working in a loading state in one working period.
In another aspect, an embodiment of the present invention further includes a computer apparatus, including a memory and a processor, where the memory is used to store at least one program, and the processor is used to load the at least one program to perform the method of the embodiment.
In another aspect, the present invention also includes a storage medium having stored therein processor-executable instructions, which when executed by a processor, are configured to perform the method of the embodiments.
The invention has the beneficial effects that: in the embodiment of the invention, the digital vortex dual-system heat pump unit is formed by the digital vortex compressor and the fixed-frequency compressor, and the control logic is configured for the digital vortex compressor and the fixed-frequency compressor, so that the control of the fixed-frequency compressor and the digital vortex compressor can be realized, wherein the coarse adjustment of the output temperature can be realized by controlling the fixed-frequency compressor, the fine adjustment of the output temperature can be realized by controlling the digital vortex compressor, and when the digital vortex heat pump unit is applied to occasions such as material drying and the like, various drying processes can be easily realized.
Drawings
FIG. 1 is a schematic structural diagram of a digital vortex heat pump unit in an embodiment.
Detailed Description
In the embodiment of the invention, the digital vortex heat pump unit is a heat pump unit with a digital vortex compressor. Referring to fig. 1, the digital vortex heat pump unit comprises a fixed-frequency compressor, a digital vortex compressor, a temperature measurement module and a control module, wherein the control module is respectively connected with the fixed-frequency compressor, the digital vortex compressor and the temperature measurement module, the control module controls the fixed-frequency compressor and the digital vortex compressor to work, and the fixed-frequency compressor and the digital vortex compressor form a double-compressor system.
The temperature measurement module detects the output temperature of digital vortex heat pump set, in the in-service use, can select to detect the temperature of the article or the region that are heated by digital vortex heat pump set, for example when being applied to article toasting with digital vortex heat pump set, can configure the temperature measurement module into the temperature that detects the roast room, as digital vortex heat pump set's output temperature.
The temperature measurement module sends the detected output temperature of the digital vortex heat pump unit to the control module, and the control module determines the control logic of the digital vortex compressor and the fixed-frequency compressor according to the output temperature, so that the control module, the temperature measurement module, the fixed-frequency compressor and the digital vortex compressor form a negative feedback system, and the output temperature is used as a negative feedback signal.
In the embodiment of the invention, the control module determines the control logic of the logarithmic scroll compressor and the fixed-frequency compressor according to the output temperature, and specifically comprises the following steps:
according to the interval of the output temperature, controlling the working state of the fixed-frequency compressor, namely controlling the fixed-frequency compressor to be opened and closed, and controlling the working duty ratio of the digital scroll compressor, namely controlling the time proportion of the digital scroll compressor working in the unloading state and working in the loading state in one working period, for example, when the working duty ratio is 100%, the digital scroll compressor works in the unloading state in one working period, namely the electromagnetic valve of the digital scroll compressor does not output in one working period; when the working duty ratio is 90%, the digital scroll compressor works in an unloading state within 90% of the time in one working period, and works in a loading state within 10% of the time, namely, the electromagnetic valve of the digital scroll compressor does not output within 90% of the time in one working period, and outputs within 10% of the time.
In the embodiment of the invention, the control module stores temperature data such as target temperature, loading return difference of the digital scroll compressor, unloading return difference of the digital scroll compressor and the like, wherein the target temperature can be set when the digital scroll heat pump unit is used, the target temperature represents the temperature to which the digital scroll heat pump unit is expected to heat articles, and the loading return difference of the digital scroll compressor and the unloading return difference of the digital scroll compressor are related to the performance of the digital scroll compressor. The target temperature, the digital scroll compressor loading return difference, the digital scroll compressor unloading return difference and other temperature data have a size relation, one or more sections can be formed, and the control module can judge which section the output temperature is in.
In the embodiment of the invention, the control module controls the digital scroll compressor and the fixed-frequency compressor according to the working period. In each working period, the control module controls the fixed-frequency compressor and the digital scroll compressor according to the working state and the working duty ratio determined by the working period. Before the next working period comes, the control module determines the working state and the working duty ratio of the next working period, namely the target working state and the target working duty ratio. When the next working period comes, the control module updates the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor, so that the fixed-frequency compressor works according to the target working state, and the digital scroll compressor works according to the target working duty ratio.
In the embodiment of the invention, when the control module is to control the working state of the fixed-frequency compressor in an upcoming working period and the working duty ratio of the digital scroll compressor in the upcoming working period, the control module determines a control parameter according to the section where the output temperature is located, then determines the working state of the fixed-frequency compressor in the upcoming working period and the working duty ratio of the digital scroll compressor in the upcoming working period according to the working state of the fixed-frequency compressor in the current working period, namely the current working state, the working duty ratio of the digital scroll compressor in the current working period, namely the current working duty ratio, and the size of the control parameter.
In the embodiment of the invention, the control parameter is represented by a symbol KI, and the value of KI can be-2, -1, 0, 1 and 2. The control module determines a plurality of sections according to the target temperature, the digital scroll compressor loading return difference and the digital scroll compressor unloading return difference, and the section where the output temperature is located is equal to the size relation between the output temperature and the target temperature, the digital scroll compressor loading return difference and the digital scroll compressor unloading return difference and other temperature data. The rule for determining KI by the control module according to the magnitude relation between the output temperature and the target temperature, the temperature data such as the loading return difference of the digital scroll compressor and the unloading return difference of the digital scroll compressor is specifically shown in Table 1.
TABLE 1
The principle of the rules of table 1 is: according to the magnitude relation between the output temperature and the target temperature, the loading return difference of the digital scroll compressor, the unloading return difference of the digital scroll compressor and the like, the change trend of the output temperature can be determined, and the change trend is expressed by the value of the control parameter. In the embodiment of the invention, KI < 0 represents that the output temperature is in an ascending trend, KI > 0 represents that the output temperature is in a descending trend, and KI-0 represents that the output temperature is unchanged.
The control module can confirm the value of the control parameter according to the rule of table 1. According to the value of the control parameter, the change trend of the output temperature of the digital vortex heat pump unit can be determined, and the control module can determine the target working state of the fixed-frequency compressor and the target working duty ratio of the digital vortex compressor by combining the current working state of the fixed-frequency compressor and the current working duty ratio of the digital vortex compressor, so that the change trend of the output temperature is met or resisted, and the adjustment of the output temperature is realized. The rules that the control module determines the target working state of the fixed-frequency compressor and the target working duty ratio of the digital scroll compressor according to the values of the control parameters, the current working state of the fixed-frequency compressor and the current working duty ratio of the digital scroll compressor are specifically shown in table 2.
TABLE 2
The embodiment of the invention uses a digital scroll compressor and a fixed frequency compressor to form a digital scroll dual-system heat pump unit, and control logics in tables 1 and 2 are configured for the digital scroll compressor and the fixed frequency compressor, the control logic in table 1 is executed firstly, a control parameter is determined according to an output temperature interval, then the control logic in table 2 is executed, and the working state of the fixed frequency compressor in an upcoming working period and the working duty ratio of the digital scroll compressor in the upcoming working period are determined according to the size of the control parameter, the working state of the fixed frequency compressor in the current working period, namely the current working state, and the working duty ratio of the digital scroll compressor in the upcoming working period. Through the combination of the control logic in the table 1 and the control logic in the table 2, the control over the fixed-frequency compressor and the digital scroll compressor can be realized, wherein the coarse adjustment of the output temperature can be realized through the control over the fixed-frequency compressor, and the fine adjustment of the output temperature can be realized through the control over the digital scroll compressor, so that the quick fine adjustment of the output temperature is realized, and when the digital scroll heat pump unit is applied to occasions such as material drying, various drying processes are easily realized.
In the embodiment of the invention, a computer program applicable to a control module in the digital vortex heat pump unit can be written through a computer programming technology, and when the computer program is read and operated by the control module, the control module can realize the control logics in the tables 1 and 2 of the embodiment so as to control the fixed-frequency compressor and the digital vortex compressor to realize the technical effects of the embodiment.
In an embodiment of the present invention, a computer apparatus includes a memory for storing at least one program and a processor for loading the at least one program to perform the control method in the embodiment, which achieves the same technical effects as those described in the embodiment.
In an embodiment of the present invention, a storage medium having stored therein processor-executable instructions for performing a control method in an embodiment when executed by a processor achieves the same technical effects as described in the embodiment.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, unless defined otherwise, all technical and scientific terms used in this example have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this embodiment, the term "and/or" includes any combination of one or more of the associated listed items.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. The use of any and all examples, or exemplary language ("e.g.," such as "or the like") provided with this embodiment is intended merely to better illuminate embodiments of the invention and does not pose a limitation on the scope of the invention unless otherwise claimed.
It should be recognized that embodiments of the present invention can be realized and implemented by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
Further, operations of processes described in this embodiment can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The processes described in this embodiment (or variations and/or combinations thereof) may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or combinations thereof. The computer program includes a plurality of instructions executable by one or more processors.
Further, the method may be implemented in any type of computing platform operatively connected to a suitable interface, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. Aspects of the invention may be embodied in machine-readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, optically read and/or write storage medium, RAM, ROM, or the like, such that it may be read by a programmable computer, which when read by the storage medium or device, is operative to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described in this embodiment includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
A computer program can be applied to input data to perform the functions described in the present embodiment to convert the input data to generate output data that is stored to a non-volatile memory. The output information may also be applied to one or more output devices, such as a display. In a preferred embodiment of the invention, the transformed data represents physical and tangible objects, including particular visual depictions of physical and tangible objects produced on a display.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (7)
1. A digital vortex heat pump unit, its characterized in that includes:
a fixed-frequency compressor;
a digital scroll compressor;
the temperature measuring module is used for detecting the output temperature of the digital vortex heat pump unit;
the control module is used for controlling the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor according to the interval of the output temperature; the working state comprises opening and closing, and the working duty ratio is the time proportion of the digital scroll compressor working in an unloading state and working in a loading state in one working period;
the controlling the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor according to the interval of the output temperature specifically comprises:
determining control parameters according to the interval of the output temperature; the interval is determined by target temperature, loading return difference of the digital scroll compressor and unloading return difference of the digital scroll compressor;
determining a target working state of the fixed-frequency compressor and a target working duty ratio of the digital scroll compressor according to the control parameters, the current working state of the fixed-frequency compressor and the current working duty ratio of the digital scroll compressor;
determining a control parameter according to the interval where the output temperature is located specifically comprises:
when the output temperature is equal to the target temperature, determining that the control parameter is 0;
when the output temperature is less than or equal to the difference between the target temperature and the loading return difference of the digital scroll compressor and the control parameter of the previous work period is less than or equal to-1, determining that the control parameter is 1;
when the output temperature is less than or equal to the difference between the target temperature and the loading return difference of the digital scroll compressor and the control parameter of the previous working period is greater than or equal to 0, determining that the control parameter is 2;
when the output temperature is greater than or equal to the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is greater than or equal to 1, determining that the control parameter is-1;
when the output temperature is greater than or equal to the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is less than or equal to 0, determining that the control parameter is-2;
when the output temperature is less than the target temperature and greater than the difference between the target temperature and the loading return difference of the digital scroll compressor, and the control parameter of the previous working period is greater than or equal to-1, determining that the control parameter is 1;
when the output temperature is less than the target temperature and greater than the difference between the target temperature and the loading return difference of the digital scroll compressor, and the control parameter of the previous working period is equal to-2, determining that the control parameter is 0;
when the output temperature is greater than the target temperature and less than the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is less than or equal to 1, determining that the control parameter is-1;
when the output temperature is greater than the target temperature and less than the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is equal to 2, determining that the control parameter is 0;
when the control parameter is greater than 0, determining a target working state of the fixed-frequency compressor and a target working duty ratio of the digital scroll compressor according to the control parameter, the current working state of the fixed-frequency compressor and the current working duty ratio of the digital scroll compressor, specifically including:
when the current working state is on and the current working duty ratio is 100%, determining that the target working duty ratio is 100%;
when the current working state is on and the current working duty ratio is less than 100%, determining that the target working duty ratio is equal to the sum of the product of the control parameter and 5% and the current working duty ratio;
when the current working state is off and the current working duty ratio is less than 100%, if the control parameter is 2, determining that the target working duty ratio is 100%, and if the control parameter is 1, determining that the target working duty ratio is equal to the sum of the current working duty ratio and 5%;
and when the current working state is closed and the current working duty ratio is equal to 100%, if the control parameter is 2, determining that the target working state is open, and if the control parameter is 1, determining that the target working duty ratio is 100%.
2. The digital vortex heat pump unit according to claim 1, wherein when the control parameter is less than 0, the determining the target operating state of the fixed-frequency compressor and the target operating duty cycle of the digital vortex compressor according to the control parameter, the current operating state of the fixed-frequency compressor and the current operating duty cycle of the digital vortex compressor specifically comprises:
when the current working state is on, the current working duty ratio is 100%, and if the control parameter is-2, the target working duty ratio is determined to be 0;
when the current working state is on, the current working duty ratio is 0, and the sum of the product of the control parameter and 5% and the current working duty ratio is less than the minimum duty ratio, determining that the target working state is off;
when the current working state is on, the current working duty ratio is 0, and the sum of the product of the control parameter and 5% and the current working duty ratio is greater than or equal to the minimum duty ratio, determining that the target working duty ratio is equal to the sum of the product of the control parameter and 5% and the current working duty ratio;
when the current working duty ratio is larger than the minimum duty ratio and the current working state is closed, determining that the target working duty ratio is equal to the sum of the product of the control parameter and 5% and the current working duty ratio;
and when the current working duty ratio is larger than the minimum duty ratio and the current working state is closed, if the control parameter is-2, determining that the target working state is closed, and if the control parameter is-1, determining that the target working duty ratio is the minimum duty ratio.
3. The digital scroll heat pump unit according to claim 1 or 2, wherein when the control parameter is equal to 0, the determining the target operating state of the fixed-frequency compressor and the target operating duty cycle of the digital scroll compressor according to the control parameter, the current operating state of the fixed-frequency compressor and the current operating duty cycle of the digital scroll compressor specifically comprises:
determining that the target operating duty cycle is equal to the current operating duty cycle.
4. The digital vortex heat pump unit according to claim 1 or 2, wherein the controlling of the operating state of the fixed frequency compressor and the operating duty cycle of the digital vortex compressor specifically comprises:
and when one working period of the digital scroll compressor is finished, updating the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor.
5. The control method of the digital vortex heat pump unit is characterized in that the digital vortex heat pump unit comprises a fixed-frequency compressor, a digital vortex compressor, a temperature measurement module and a control module, and the control method comprises the following steps:
detecting the output temperature of the digital vortex heat pump unit;
controlling the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor according to the interval of the output temperature; the working state comprises opening and closing, and the working duty ratio is the time proportion of the digital scroll compressor working in an unloading state and working in a loading state in one working period;
the controlling the working state of the fixed-frequency compressor and the working duty ratio of the digital scroll compressor according to the interval of the output temperature specifically comprises:
determining control parameters according to the interval of the output temperature; the interval is determined by target temperature, loading return difference of the digital scroll compressor and unloading return difference of the digital scroll compressor;
determining a target working state of the fixed-frequency compressor and a target working duty ratio of the digital scroll compressor according to the control parameters, the current working state of the fixed-frequency compressor and the current working duty ratio of the digital scroll compressor;
determining a control parameter according to the interval where the output temperature is located specifically comprises:
when the output temperature is equal to the target temperature, determining that the control parameter is 0;
when the output temperature is less than or equal to the difference between the target temperature and the loading return difference of the digital scroll compressor and the control parameter of the previous work period is less than or equal to-1, determining that the control parameter is 1;
when the output temperature is less than or equal to the difference between the target temperature and the loading return difference of the digital scroll compressor and the control parameter of the previous working period is greater than or equal to 0, determining that the control parameter is 2;
when the output temperature is greater than or equal to the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is greater than or equal to 1, determining that the control parameter is-1;
when the output temperature is greater than or equal to the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is less than or equal to 0, determining that the control parameter is-2;
when the output temperature is less than the target temperature and greater than the difference between the target temperature and the loading return difference of the digital scroll compressor, and the control parameter of the previous working period is greater than or equal to-1, determining that the control parameter is 1;
when the output temperature is less than the target temperature and greater than the difference between the target temperature and the loading return difference of the digital scroll compressor, and the control parameter of the previous working period is equal to-2, determining that the control parameter is 0;
when the output temperature is greater than the target temperature and less than the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is less than or equal to 1, determining that the control parameter is-1;
when the output temperature is greater than the target temperature and less than the sum of the target temperature and the unloading return difference of the digital scroll compressor, and the control parameter of the previous working period is equal to 2, determining that the control parameter is 0;
when the control parameter is greater than 0, determining a target working state of the fixed-frequency compressor and a target working duty ratio of the digital scroll compressor according to the control parameter, the current working state of the fixed-frequency compressor and the current working duty ratio of the digital scroll compressor, specifically including:
when the current working state is on and the current working duty ratio is 100%, determining that the target working duty ratio is 100%;
when the current working state is on and the current working duty ratio is less than 100%, determining that the target working duty ratio is equal to the sum of the product of the control parameter and 5% and the current working duty ratio;
when the current working state is off and the current working duty ratio is less than 100%, if the control parameter is 2, determining that the target working duty ratio is 100%, and if the control parameter is 1, determining that the target working duty ratio is equal to the sum of the current working duty ratio and 5%;
and when the current working state is closed and the current working duty ratio is equal to 100%, if the control parameter is 2, determining that the target working state is open, and if the control parameter is 1, determining that the target working duty ratio is 100%.
6. A computer apparatus comprising a memory for storing at least one program and a processor for loading the at least one program to perform the method of claim 5.
7. A storage medium having stored therein processor-executable instructions, which when executed by a processor, are configured to perform the method of claim 5.
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