Method and device for controlling multi-split air conditioner, multi-split air conditioner, storage medium
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
- Filing Date
- 2022-08-03
- Publication Date
- 2026-06-12
Smart Images
Figure CN117553414B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of multi-split air conditioning technology, such as a method and apparatus for controlling a multi-split air conditioner, a multi-split air conditioner, and a storage medium. Background Technology
[0002] A multi-split air conditioner's indoor unit typically consists of a first heat exchange unit and a second heat exchange unit. The first heat exchange unit is used for heat exchange between the refrigerant and air, while the second heat exchange unit is used for heat exchange between the refrigerant and water. Due to the different heat exchange media, the first and second heat exchange units place different demands on the outdoor unit's compressor. In related technologies, when the multi-split air conditioner is in heating mode, a first target high pressure and a second target high pressure are obtained from both heat exchange units; the higher of the first and second target low pressures is taken as the target pressure. When the multi-split air conditioner is in cooling mode, a first target low pressure and a second target low pressure are obtained from both heat exchange units; the lower of the first and second target low pressures is taken as the target pressure. The compressor frequency is then directly adjusted until the compressor pressure equals the target pressure. However, simply adjusting the compressor frequency to achieve the target pressure can easily lead to an excessively high compressor frequency, causing some internal components of the multi-split air conditioner to reach the set temperature and enter standby mode, resulting in unstable operation. Summary of the Invention
[0003] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.
[0004] This disclosure provides a method and apparatus for controlling a multi-split air conditioner, a multi-split air conditioner, and a storage medium, to improve the stability of the operation of the multi-split air conditioner.
[0005] In some embodiments, the indoor unit of the multi-split air conditioner is provided with a first heat exchange unit and a second heat exchange unit; both the first heat exchange unit and the second heat exchange unit are provided with electronic expansion valves; the first heat exchange unit is used for heat exchange between refrigerant and air; the second heat exchange unit is used for heat exchange between refrigerant and water; the method for controlling the multi-split air conditioner includes: acquiring the air conditioner operating mode, compressor pressure, and heat exchanger load ratio; determining a first target pressure and a second target pressure according to the air conditioner operating mode; determining the compressor frequency according to the compressor pressure, and triggering the compressor to operate at the compressor frequency until the compressor pressure is equal to or greater than the first target pressure; determining the valve opening degree according to the heat exchanger load ratio, and triggering the electronic expansion valve to open according to the valve opening degree; and acquiring the compressor pressure again after a first preset time period; determining the parameter to be adjusted according to the reacquired compressor pressure, and triggering the component corresponding to the parameter to be adjusted to operate according to the parameter to be adjusted until the compressor pressure is greater than or equal to the second target pressure.
[0006] In some embodiments, the indoor unit of the multi-split air conditioner is provided with a first heat exchange unit and a second heat exchange unit; both the first heat exchange unit and the second heat exchange unit are provided with electronic expansion valves; the first heat exchange unit is used for heat exchange between refrigerant and air; the second heat exchange unit is used for heat exchange between refrigerant and water; the device for controlling the multi-split air conditioner includes: an acquisition module configured to acquire the air conditioner operating mode, compressor pressure, and heat exchanger load ratio; a determination module configured to determine a first target pressure and a second target pressure according to the air conditioner operating mode; a first adjustment module configured to determine the compressor frequency according to the compressor pressure and trigger the compressor to operate at the compressor frequency until the compressor pressure is equal to or greater than the first target pressure; a second adjustment module configured to determine the valve opening according to the heat exchanger load ratio, trigger the electronic expansion valve to open according to the valve opening, and reacquire the compressor pressure after a first preset time period; and a third adjustment module configured to determine the parameter to be adjusted according to the reacquired compressor pressure, trigger the component corresponding to the parameter to be adjusted to operate according to the parameter to be adjusted until the compressor pressure is greater than or equal to the second target pressure.
[0007] In some embodiments, a multi-split air conditioner includes a processor and a memory storing program instructions, the processor being configured to execute the above-described method for controlling the multi-split air conditioner when the program instructions are executed.
[0008] In some embodiments, the storage medium stores program instructions that, when executed, perform the method described above for controlling a multi-split air conditioner.
[0009] The method and apparatus for controlling a multi-split air conditioner, the multi-split air conditioner, and the storage medium provided in this disclosure can achieve the following technical effects: By acquiring the air conditioner's operating mode, compressor pressure, and heat exchanger load ratio, a first target pressure and a second target pressure are determined based on the air conditioner's operating mode. The compressor frequency is determined based on the compressor pressure, and the compressor is triggered to operate at the compressor frequency until the compressor pressure equals or exceeds the first target pressure. The valve opening is determined based on the heat exchanger load ratio, and the electronic expansion valve is triggered to open at the valve opening degree. After a first preset time period, the compressor pressure is reacquired. The parameter to be adjusted is determined based on the reacquired compressor pressure, and the component corresponding to the parameter to be adjusted is triggered to operate according to the parameter until the compressor pressure is greater than or equal to the second target pressure. Thus, by determining the first and second target pressures, the process of adjusting the compressor pressure is divided into two stages. After the compressor pressure equals the first target pressure, the compressor pressure is increased by adjusting the electronic expansion valve, rather than simply adjusting the compressor frequency to make the compressor pressure equal to the target pressure. This reduces the compressor frequency, thereby improving the stability of the multi-split air conditioner's operation.
[0010] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description
[0011] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:
[0012] Figure 1 This is a schematic diagram of the structure of a multi-split air conditioner provided in an embodiment of this disclosure;
[0013] Figure 2 This is a schematic diagram of a method for controlling a multi-split air conditioner provided in an embodiment of this disclosure;
[0014] Figure 3 This is a schematic diagram of a method for adjusting compressor frequency provided in an embodiment of this disclosure;
[0015] Figure 4 This is a schematic diagram of another method for controlling a multi-split air conditioner provided in an embodiment of this disclosure;
[0016] Figure 5 This is a schematic diagram of a device for controlling a multi-split air conditioner provided in an embodiment of this disclosure;
[0017] Figure 6 This is a schematic diagram of a multi-split air conditioner provided in an embodiment of this disclosure.
[0018] Figure label:
[0019] 1: Indoor unit; 2: Outdoor unit; 3: First heat exchange unit; 4: Second heat exchange unit; 5: Main unit; 6: Sub-unit. Detailed Implementation
[0020] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.
[0021] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0022] Unless otherwise stated, the term "multiple" means two or more.
[0023] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.
[0024] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.
[0025] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.
[0026] This application applies to multi-split air conditioners. Figure 1 This is a structural diagram of a multi-split air conditioner. Figure 1 As shown, the multi-split air conditioner includes an indoor unit 1 and an outdoor unit 2. The indoor unit 1 includes multiple first heat exchange units 3 and multiple second heat exchange units 4. The outdoor unit 2 includes a main unit 5 and multiple sub-units 6. The main unit is responsible for controlling the multi-split air conditioner.
[0027] Combination Figure 2As shown in the embodiment of this disclosure, a method for controlling a multi-split air conditioner is provided. The indoor unit of the multi-split air conditioner is provided with a first heat exchange unit and a second heat exchange unit; both the first and second heat exchange units are provided with electronic expansion valves; the first heat exchange unit is used for heat exchange between refrigerant and air; the second heat exchange unit is used for heat exchange between refrigerant and water; the method for controlling the multi-split air conditioner includes:
[0028] Step S201: The multi-split air conditioner obtains the air conditioner operating mode, compressor pressure, and heat exchanger load ratio.
[0029] In step S202, the multi-split air conditioner determines the first target pressure and the second target pressure according to the air conditioner's operating mode.
[0030] In step S203, the multi-split air conditioner determines the compressor frequency based on the compressor pressure and triggers the compressor to run at the compressor frequency until the compressor pressure is equal to or greater than the first target pressure.
[0031] In step S204, the multi-split air conditioner determines the valve opening degree according to the heat exchanger load ratio, triggers the electronic expansion valve to open according to the valve opening degree, and re-acquires the compressor pressure after a first preset time.
[0032] In step S205, the multi-split air conditioner determines the parameters to be adjusted based on the reacquired compressor pressure, and triggers the components corresponding to the parameters to be adjusted to operate according to the parameters until the compressor pressure is greater than or equal to the second target pressure.
[0033] The method for controlling a multi-split air conditioner provided in this disclosure acquires the air conditioner's operating mode, compressor pressure, and heat exchanger load ratio. A first target pressure and a second target pressure are determined based on the air conditioner's operating mode. The compressor frequency is determined based on the compressor pressure, and the compressor is triggered to operate at the compressor frequency until the compressor pressure equals or exceeds the first target pressure. The valve opening is determined based on the heat exchanger load ratio, and the electronic expansion valve is triggered to open at the specified opening. After a first preset time, the compressor pressure is reacquired. An adjustment parameter is determined based on the reacquired compressor pressure, and the corresponding component is triggered to operate according to the adjustment parameter until the compressor pressure is greater than or equal to the second target pressure. Thus, by determining the first and second target pressures, the process of adjusting the compressor pressure is divided into two stages. After the compressor pressure equals the first target pressure, the compressor pressure is increased by adjusting the electronic expansion valve, rather than simply adjusting the compressor frequency to achieve the target pressure. This reduces the compressor frequency and improves the stability of the multi-split air conditioner's operation.
[0034] Optionally, the compressor pressure can be obtained as follows: when the air conditioner is operating in cooling mode, the compressor suction pressure is determined as the compressor pressure. When the air conditioner is operating in heating mode, the compressor discharge pressure is determined as the compressor pressure. The compressor suction pressure can be detected by a low-pressure sensor installed on the suction pipe. The compressor discharge pressure can be detected by a high-pressure sensor installed on the discharge pipe.
[0035] Optionally, the heat exchanger load ratio can be obtained by calculating A = B / (B+C). Where A is the heat exchanger load ratio, B is the demand load of the first heat exchange unit, and C is the demand load of the second heat exchange unit.
[0036] Furthermore, the demand load of the first heat exchange unit is obtained in the following way: when the air conditioning is in cooling mode, it is calculated... Obtain the demand load of the first heat exchange unit. With the air conditioning operating in heating mode, calculate... Obtain the demand load of the first heat exchange unit. Here, i is a positive integer, and n is the number of the first heat exchange units in the indoor units of the multi-split air conditioner. i Let TASet be the current temperature of the i-th first heat exchange unit. i HP is the set temperature of the i-th first heat exchange unit. i This represents the load capacity of the i-th first heat exchange unit, where "×" signifies multiplication. In some embodiments, the current temperature of the first heat exchange unit can be obtained through a temperature sensor located in the first heat exchange unit. The set temperature of the first heat exchange unit is preset.
[0037] Furthermore, the demand load of the second heat exchange unit is obtained in the following way: when the air conditioning is in cooling mode, it is calculated... Obtain the demand load of the second heat exchange unit. When the air conditioning is in heating mode, calculate... Obtain the demand load of the second heat exchange unit. Where j is a positive integer, and m is the number of second heat exchange units in the indoor units of the multi-split air conditioner. j Let TwSet be the current water temperature of the j-th second heat exchange unit. j The set water temperature for the j-th second heat exchange unit, HP j This represents the load capacity of the j-th second heat exchange unit. In some embodiments, the current water temperature of the second heat exchange unit can be obtained through a temperature sensor installed in the second heat exchange unit. The set water temperature of the second heat exchange unit is preset.
[0038] Optionally, determining the first target pressure and the second target pressure based on the air conditioning operating mode includes: when the air conditioning operating mode is cooling mode, obtaining the first target low pressure of the first heat exchange unit and the second target low pressure of the second heat exchange unit. The larger of the first target low pressure and the second target low pressure is determined as the first target pressure, and the smaller value is determined as the second target pressure. And / or, when the air conditioning operating mode is heating mode, obtaining the first target high pressure of the first heat exchange unit and the second target high pressure of the second heat exchange unit. The smaller of the first target high pressure and the second target high pressure is determined as the first target pressure, and the larger value is determined as the second target pressure. Here, the first target low pressure, the second target low pressure, the first target high pressure, and the second target high pressure are all preset. In this way, determining the first target pressure and the second target pressure based on the air conditioning operating mode can reasonably divide the process of adjusting the compressor pressure into two stages, thereby facilitating the adjustment of the compressor pressure to the second target pressure while ensuring the stable operation of the multi-split air conditioner.
[0039] Optionally, the compressor frequency is determined based on the compressor pressure, including: re-acquiring the compressor pressure and initial compressor frequency every second preset time interval. If the compressor pressure is lower than the first target pressure, the initial compressor frequency is calculated plus a first preset growth frequency to obtain a first alternative compressor frequency. The first alternative compressor frequency is determined as the initial compressor frequency and the compressor frequency. The second preset time interval is, for example, 1 minute. The first preset growth frequency is, for example, 10 Hz. In this way, the compressor frequency is directly adjusted until the compressor pressure equals the first target pressure. This allows for a quick and easy increase in compressor pressure while ensuring the compressor frequency does not become excessively high.
[0040] In some embodiments, when a multi-split air conditioner is initially running, the initial compressor frequency is a preset compressor frequency.
[0041] In some embodiments, compressor pressure D and initial compressor frequency E are acquired. If compressor pressure D is less than a first target pressure, the initial compressor frequency E is calculated plus a first preset growth frequency F to obtain a first alternative compressor frequency G. This first alternative compressor frequency G is then determined as both the initial compressor frequency and the actual compressor frequency. The compressor is triggered to operate at its current compressor frequency, i.e., at the first alternative compressor frequency G. After a second preset time interval, compressor pressure H and initial compressor frequency J are acquired again. The initial compressor frequency J is the first alternative compressor frequency G. If compressor pressure H is less than the first target pressure, the initial compressor frequency G is calculated plus the first preset growth frequency F to obtain a first alternative compressor frequency I. This first alternative compressor frequency I is then determined as both the initial compressor frequency and the actual compressor frequency.
[0042] Combination Figure 3As shown, this disclosure provides a method for adjusting the frequency of a compressor, including:
[0043] In step S301, the multi-split air conditioner obtains the compressor pressure and initial compressor frequency, and then executes step S302.
[0044] Step S302: The multi-split air conditioner determines whether the compressor pressure is less than the first target pressure; if the compressor pressure is less than the first target pressure, proceed to step S303; if the compressor pressure is not less than the first target pressure, proceed to step S304.
[0045] Step S303: The multi-split air conditioner calculates the initial compressor frequency plus the first preset growth frequency to obtain the first alternative compressor frequency; the first alternative compressor frequency is determined as the initial compressor frequency and the compressor frequency, and then step S301 is executed.
[0046] Step S304: End the process.
[0047] The method for adjusting compressor frequency provided in this disclosure involves obtaining compressor pressure and an initial compressor frequency through a multi-split air conditioner, and determining whether the compressor pressure is less than a first target pressure. If the compressor pressure is less than the first target pressure, the initial compressor frequency is added to a first preset growth frequency to obtain a first candidate compressor frequency. This first candidate compressor frequency is then set as the initial compressor frequency and the original compressor frequency, until the compressor pressure is greater than or equal to the first target pressure. In this way, directly adjusting the compressor frequency can quickly and easily raise the compressor pressure to equal or greater than the first target pressure.
[0048] Optionally, the electronic expansion valve installed in the first heat exchange unit is a first expansion valve, and the electronic expansion valve installed in the second heat exchange unit is a second expansion valve. The valve opening is determined based on the heat exchanger load ratio, and the electronic expansion valve is triggered to open according to the valve opening, including: obtaining the first valve opening of the first expansion valve and the second valve opening of the second expansion valve. When the heat exchanger load ratio is less than a first preset threshold, a first compensation parameter is determined based on the heat exchanger load ratio. A second compensation parameter is determined based on the first compensation parameter. The first valve opening is calculated by subtracting the first compensation parameter to obtain a first alternative valve opening. The second valve opening is calculated by adding the second compensation parameter to obtain a second alternative valve opening. The first expansion valve is triggered to operate according to the first alternative valve opening, and the second expansion valve operates according to the second alternative valve opening. And / or, when the heat exchanger load ratio is greater than a second preset threshold, a third compensation parameter is determined based on the heat exchanger load ratio. A fourth compensation parameter is determined based on the third compensation parameter. The first valve opening is calculated by adding the fourth compensation parameter to obtain a third alternative valve opening. The second valve opening is calculated by subtracting the third compensation parameter to obtain a fourth alternative valve opening. The first expansion valve is triggered to operate at the opening degree of the third alternative valve, and the second expansion valve operates at the opening degree of the fourth alternative valve. The first preset threshold is, for example, 45%, and the second preset threshold is, for example, 55%. In some embodiments, when the air conditioning operation mode is cooling mode, the opening degrees of the first and second valves are determined based on the difference between the gas pipe temperature and the liquid pipe temperature.
[0049] Furthermore, determining the first compensation parameter based on the heat exchanger load ratio includes: using a preset first compensation database to perform a lookup operation on the heat exchanger load ratio to obtain the first compensation parameter corresponding to the heat exchanger load ratio. The first compensation database stores the correspondence between the heat exchanger load ratio and the first compensation parameter.
[0050] Furthermore, determining the second compensation parameter based on the first compensation parameter includes: calculating... Obtain the second compensation parameter. Among them, Fix1 is the second compensation parameter, and Fix2 is the first compensation parameter.
[0051] In some embodiments, the indoor unit of a multi-split air conditioner is equipped with three first heat exchange units and three second heat exchange units, for example: first heat exchange unit a, first heat exchange unit b, first heat exchange unit c, second heat exchange unit d, second heat exchange unit e, and second heat exchange unit f. The heat exchanger load ratio is obtained as 35%. Using a preset first compensation database, a lookup operation is performed on the heat exchanger load ratio of 35% to obtain the first compensation parameter corresponding to the heat exchanger load ratio of 35% as 10. The load capacity of the first heat exchange unit a is obtained as 2.5, the load capacity of the first heat exchange unit b as 5, the load capacity of the first heat exchange unit c as 3, the load capacity of the second heat exchange unit d as 4, the load capacity of the second heat exchange unit e as 2, and the load capacity of the second heat exchange unit f as 1.5. Calculation... Equals 10.5, calculate If it equals 7.5, then Fix1 equals 14, meaning the second compensation parameter equals 14.
[0052] Furthermore, the third compensation parameter is determined based on the heat exchanger load ratio, including: using a preset second compensation database, performing a lookup operation on the heat exchanger load ratio to obtain the third compensation parameter corresponding to the heat exchanger load ratio. The second compensation database stores the correspondence between the heat exchanger load ratio and the third compensation parameter.
[0053] Furthermore, the fourth compensation parameter is determined based on the third compensation parameter, including: calculating... Obtain the fourth compensation parameter. Among them, Fix3 is the fourth compensation parameter, and Fix4 is the third compensation parameter.
[0054] Optionally, the parameters to be adjusted include valve opening or compressor frequency. Determining the parameters to be adjusted based on the reacquired compressor pressure includes: calculating the reacquired compressor pressure minus the compressor pressure before reacquisition to obtain a pressure difference. If the pressure difference is greater than or equal to a third preset threshold, the valve opening is re-determined based on the heat exchanger load ratio. If the pressure difference is less than the third preset threshold, the compressor frequency is calculated plus a second preset growth frequency to obtain a second alternative compressor frequency; this second alternative compressor frequency is then determined as the compressor frequency. The second preset growth frequency is, for example, 5Hz. In some embodiments, the second preset growth frequency is less than the first preset growth frequency. Thus, since adjusting the electronic expansion valve's opening is considered to have little effect on increasing compressor pressure when the pressure difference is less than the third preset threshold, the electronic expansion valve's opening is only adjusted when the pressure difference is greater than or equal to the third preset threshold. Otherwise, the compressor frequency is adjusted. By prioritizing the control of the electronic expansion valve's opening to adjust the refrigerant flow, and then adjusting the compressor frequency according to changes in compressor pressure, the stability of multi-split air conditioning operation is improved, and energy conservation and consumption reduction are achieved.
[0055] Optionally, after determining the second alternative compressor frequency as the compressor frequency, the method further includes: re-acquiring the compressor pressure after a third preset time period. If the compressor pressure is lower than the second target pressure, the valve opening is re-determined based on the heat exchanger load ratio, triggering the electronic expansion valve to open according to the valve opening. In this way, after each adjustment of the compressor frequency, the compressor pressure is acquired by changing the valve opening of the electronic expansion valve, thereby determining whether to continue adjusting the compressor frequency or adjust the valve opening of the electronic expansion valve. Instead of simply adjusting the compressor frequency to make the compressor pressure equal to the target pressure, this method can reduce the compressor frequency, thereby improving the stability of the multi-split air conditioner operation.
[0056] Combination Figure 4As shown in the embodiment of this disclosure, a method for controlling a multi-split air conditioner is provided. The indoor unit of the multi-split air conditioner is provided with a first heat exchange unit and a second heat exchange unit; both the first and second heat exchange units are provided with electronic expansion valves; the first heat exchange unit is used for heat exchange between refrigerant and air; the second heat exchange unit is used for heat exchange between refrigerant and water; the method for controlling the multi-split air conditioner includes:
[0057] Step S401: The multi-split air conditioner obtains the air conditioner operating mode, compressor pressure, and heat exchanger load ratio, and then executes step S402.
[0058] In step S402, the multi-split air conditioner determines the first target pressure and the second target pressure according to the air conditioner's operating mode, and then executes step S403.
[0059] In step S403, the multi-split air conditioner determines the compressor frequency based on the compressor pressure and triggers the compressor to run at the compressor frequency; after a second preset time, it re-acquires the compressor pressure and then executes step S404.
[0060] Step S404: The multi-split air conditioner determines whether the compressor pressure is equal to or greater than the first target pressure; if the compressor pressure is equal to or greater than the first target pressure, proceed to step S405; if the compressor pressure is not equal to or greater than the first target pressure, proceed to step S403.
[0061] In step S405, the multi-split air conditioner determines the valve opening degree according to the heat exchanger load ratio and triggers the electronic expansion valve to open according to the valve opening degree; and after a first preset time, it re-acquires the compressor pressure, and then executes step S406.
[0062] In step S406, the multi-split air conditioner calculates the pressure difference by subtracting the compressor pressure before re-acquiring the new compressor pressure, and then executes step S407.
[0063] Step S407: The multi-split air conditioner determines whether the pressure difference is greater than or equal to the third preset threshold; if the pressure difference is greater than or equal to the third preset threshold, proceed to step S405; if the pressure difference is not greater than or equal to the third preset threshold, proceed to step S408.
[0064] Step S408: The multi-split air conditioner calculates the compressor frequency plus the second preset growth frequency to obtain the second alternative compressor frequency; the second alternative compressor frequency is determined as the compressor frequency; after a third preset time period, the compressor pressure is re-acquired, and then step S409 is executed.
[0065] Step S409: The multi-split air conditioner determines whether the compressor pressure is less than or equal to the second target pressure; if the compressor pressure is less than the second target pressure, proceed to step S405; if the compressor pressure is not less than the second target pressure, proceed to step S410.
[0066] Step S410: End the process.
[0067] The method for controlling a multi-split air conditioner provided in this disclosure continuously acquires compressor pressure. First, the compressor frequency is determined based on the compressor pressure until the compressor pressure reaches a first target pressure. Then, the valve opening is determined based on the heat exchanger load ratio, triggering the electronic expansion valve to open accordingly. After a period of time, the compressor pressure is acquired again, and the change in compressor pressure determines whether to continue adjusting the valve opening or adjust the compressor frequency. After adjusting the compressor frequency, the expansion valve opening is readjusted, and another judgment is made regarding whether to continue adjusting the valve opening or adjust the compressor frequency, until the compressor pressure equals a second target pressure. Adjusting the compressor pressure through repeated adjustments and judgments, rather than simply adjusting the compressor frequency to achieve the second target pressure, improves the stability of the multi-split air conditioner operation and enables energy saving and consumption reduction.
[0068] Optionally, the process further includes determining the parameter to be adjusted based on the reacquired compressor pressure, triggering the component corresponding to the parameter to be adjusted to operate according to the parameter until the compressor pressure is greater than or equal to the second target pressure, and then further including: re-determining the compressor frequency based on the second target pressure, and triggering the compressor to operate according to the compressor frequency.
[0069] Furthermore, the compressor frequency is re-determined based on the second target pressure, including: using a preset frequency database to perform a lookup operation on the second target pressure to obtain the compressor frequency corresponding to the second target pressure. The frequency database stores the correspondence between the second target pressure and the compressor frequency.
[0070] Combination Figure 5As shown, this disclosure provides an apparatus for controlling a multi-split air conditioner. The indoor unit of the multi-split air conditioner is equipped with a first heat exchange unit and a second heat exchange unit. Both the first and second heat exchange units are equipped with electronic expansion valves. The first heat exchange unit is used for heat exchange between refrigerant and air. The second heat exchange unit is used for heat exchange between refrigerant and water. The apparatus for controlling the multi-split air conditioner includes: an acquisition module 501, a determination module 502, a first adjustment module 503, a second adjustment module 504, and a third adjustment module 505. The first acquisition module 501 is configured to acquire the air conditioner operating mode, compressor pressure, and heat exchanger load ratio. The heat exchanger load ratio is the ratio between the first demand load of the first heat exchange unit and the second demand load of the second heat exchange unit. The determination module 502 is configured to determine a first target pressure and a second target pressure based on the air conditioner operating mode. The first adjustment module 503 is configured to determine the compressor frequency based on the compressor pressure and trigger the compressor to operate at the compressor frequency until the compressor pressure is equal to or greater than the first target pressure. The second adjustment module 504 is configured to determine the valve opening degree based on the heat exchanger load ratio and trigger the electronic expansion valve to open according to the valve opening degree. After a first preset time period, it re-acquires the compressor pressure. The third adjustment module 505 is configured to determine the parameter to be adjusted based on the re-acquired compressor pressure and trigger the component corresponding to the parameter to operate according to the parameter until the compressor pressure is greater than or equal to the second target pressure.
[0071] The apparatus for controlling a multi-split air conditioner provided in this disclosure acquires the air conditioner's operating mode, compressor pressure, and heat exchanger load ratio through an acquisition module. A determination module determines a first target pressure and a second target pressure based on the air conditioner's operating mode. A first adjustment module determines the compressor frequency based on the compressor pressure and triggers the compressor to operate at that frequency until the compressor pressure equals or exceeds the first target pressure. A second adjustment module determines the valve opening based on the heat exchanger load ratio, triggers the electronic expansion valve to open at that opening degree, and reacquires the compressor pressure after a first preset time. A third adjustment module determines the parameter to be adjusted based on the reacquired compressor pressure and triggers the corresponding component to operate according to the parameter until the compressor pressure is greater than or equal to the second target pressure. Thus, by determining the first and second target pressures, the process of adjusting the compressor pressure is divided into two stages. After the compressor pressure equals the first target pressure, the compressor pressure is increased by adjusting the electronic expansion valve, rather than simply adjusting the compressor frequency to achieve the target pressure. This reduces the compressor frequency and improves the stability of the multi-split air conditioner's operation.
[0072] Combination Figure 6As shown, this disclosure provides a multi-split air conditioner, including a processor 600 and a memory 601. Optionally, the multi-split air conditioner may further include a communication interface 602 and a bus 603. The processor 600, communication interface 602, and memory 601 can communicate with each other via the bus 603. The communication interface 602 can be used for information transmission. The processor 600 can call logical instructions in the memory 601 to execute the method for controlling the multi-split air conditioner described in the above embodiment.
[0073] Furthermore, the logic instructions in the aforementioned memory 601 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.
[0074] The memory 601, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 600 executes functional applications and data processing by running the program instructions / modules stored in the memory 601, that is, it implements the method for controlling multi-split air conditioners in the above embodiments.
[0075] The memory 601 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 601 may include high-speed random access memory and may also include non-volatile memory.
[0076] The multi-split air conditioner provided in this embodiment acquires the air conditioner's operating mode, compressor pressure, and heat exchanger load ratio. A first target pressure and a second target pressure are determined based on the air conditioner's operating mode. The compressor frequency is determined based on the compressor pressure, and the compressor is triggered to operate at the compressor frequency until the compressor pressure equals or exceeds the first target pressure. The valve opening is determined based on the heat exchanger load ratio, and the electronic expansion valve is triggered to open at the specified opening. After a first preset time, the compressor pressure is reacquired. The parameter to be adjusted is determined based on the reacquired compressor pressure, and the component corresponding to the parameter is triggered to operate according to the parameter until the compressor pressure is greater than or equal to the second target pressure. Thus, by determining the first and second target pressures, the process of adjusting the compressor pressure is divided into two stages. After the compressor pressure equals the first target pressure, the compressor pressure is increased by adjusting the electronic expansion valve, rather than simply adjusting the compressor frequency to achieve the target pressure. This reduces the compressor frequency and improves the stability of the multi-split air conditioner's operation.
[0077] This disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for controlling a multi-split air conditioner.
[0078] This disclosure provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the above-described method for controlling a multi-split air conditioner.
[0079] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.
[0080] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.
[0081] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.
[0082] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0083] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
[0084] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.
Claims
1. A method for controlling a multi-split air conditioner, wherein the indoor unit of the multi-split air conditioner is provided with a first heat exchange unit and a second heat exchange unit; both the first heat exchange unit and the second heat exchange unit are provided with electronic expansion valves; the first heat exchange unit is used for heat exchange between refrigerant and air; the second heat exchange unit is used for heat exchange between refrigerant and water; characterized in that, The method includes: Obtain the air conditioner operating mode, compressor pressure, and heat exchanger load ratio; Determine the first target pressure and the second target pressure based on the air conditioning operation mode; The compressor frequency is determined based on the compressor pressure, and the compressor is triggered to run at the compressor frequency until the compressor pressure is equal to or greater than the first target pressure. The valve opening is determined according to the heat exchanger load ratio, triggering the electronic expansion valve to open according to the valve opening; and the compressor pressure is reacquired after a first preset time. The parameters to be adjusted are determined based on the reacquired compressor pressure, and the components corresponding to the parameters to be adjusted are triggered to operate according to the parameters to be adjusted until the compressor pressure is greater than or equal to the second target pressure. The determination of the first target pressure and the second target pressure based on the air conditioning operation mode includes: when the air conditioning operation mode is cooling mode, obtaining the first target low pressure of the first heat exchange unit and the second target low pressure of the second heat exchange unit; determining the larger of the first target low pressure and the second target low pressure as the first target pressure, and the smaller of the two as the second target pressure; The heat exchanger load ratio is obtained by calculating A = B / (B+C); where A is the heat exchanger load ratio, B is the demand load of the first heat exchange unit, and C is the demand load of the second heat exchange unit.
2. The method according to claim 1, characterized in that, Determining the first target pressure and the second target pressure based on the air conditioning operating mode also includes: When the air conditioner is in heating mode, the first target high pressure of the first heat exchange unit and the second target high pressure of the second heat exchange unit are obtained; the smaller value of the first target high pressure and the second target high pressure is determined as the first target pressure, and the larger value is determined as the second target pressure.
3. The method according to claim 1, characterized in that, Determining the compressor frequency based on compressor pressure includes: Every second preset time interval, the compressor pressure and initial compressor frequency are reacquired; if the compressor pressure is less than the first target pressure, the initial compressor frequency is calculated plus the first preset growth frequency to obtain the first alternative compressor frequency; the first alternative compressor frequency is determined as the initial compressor frequency and the compressor frequency.
4. The method according to claim 1, characterized in that, The electronic expansion valve installed in the first heat exchange unit is a first expansion valve, and the electronic expansion valve installed in the second heat exchange unit is a second expansion valve; The valve opening degree is determined based on the heat exchanger load ratio, and the electronic expansion valve is triggered to open according to the valve opening degree, including: Obtain the first valve opening degree of the first expansion valve and the second valve opening degree of the second expansion valve; When the heat exchanger load ratio is less than a first preset threshold, a first compensation parameter is determined based on the heat exchanger load ratio; a second compensation parameter is determined based on the first compensation parameter; a first alternative valve opening is obtained by subtracting the first compensation parameter from the first valve opening; a second alternative valve opening is obtained by adding the second compensation parameter to the second valve opening; the first expansion valve is triggered to operate at the first alternative valve opening, and the second expansion valve operates at the second alternative valve opening; and / or, When the heat exchanger load ratio is greater than the second preset threshold, a third compensation parameter is determined based on the heat exchanger load ratio; a fourth compensation parameter is determined based on the third compensation parameter; the opening degree of the first valve is calculated plus the fourth compensation parameter to obtain the opening degree of the third alternative valve; the opening degree of the second valve is calculated minus the third compensation parameter to obtain the opening degree of the fourth alternative valve; the first expansion valve is triggered to operate according to the opening degree of the third alternative valve, and the second expansion valve operates according to the opening degree of the fourth alternative valve.
5. The method according to claim 1, wherein the parameter to be adjusted includes valve opening degree or compressor frequency; characterized in that, The parameters to be adjusted are determined based on the re-acquired compressor pressure, including: Calculate the pressure difference by subtracting the compressor pressure before re-acquiring it from the re-acquiring compressor pressure. If the pressure difference is greater than or equal to the third preset threshold, the valve opening is re-determined according to the heat exchanger load ratio; When the pressure difference is less than the third preset threshold, the compressor frequency is calculated by adding the second preset growth frequency to obtain the second alternative compressor frequency; the second alternative compressor frequency is then determined as the compressor frequency.
6. The method according to claim 5, characterized in that, After determining the frequency of the second alternative compressor as the compressor frequency, the following is also included: After a third preset time period, the compressor pressure is reacquired; if the compressor pressure is less than the second target pressure, the valve opening is re-determined according to the heat exchanger load ratio, and the electronic expansion valve is triggered to open according to the valve opening.
7. The method according to any one of claims 1 to 5, characterized in that, Based on the reacquired compressor pressure, the parameters to be adjusted are determined, and the components corresponding to the parameters to be adjusted are triggered to operate according to the parameters to be adjusted until the compressor pressure is greater than or equal to the second target pressure. The process further includes: The compressor frequency is redefined based on the second target pressure, and the compressor is triggered to operate at the compressor frequency.
8. A device for controlling a multi-split air conditioner, wherein the indoor unit of the multi-split air conditioner is provided with a first heat exchange unit and a second heat exchange unit; both the first heat exchange unit and the second heat exchange unit are provided with electronic expansion valves; the first heat exchange unit is used for heat exchange between refrigerant and air; the second heat exchange unit is used for heat exchange between refrigerant and water; characterized in that, The device includes: The acquisition module is configured to acquire the air conditioner operating mode, compressor pressure, and heat exchanger load ratio. The determining module is configured to determine a first target pressure and a second target pressure based on the air conditioning operating mode; The first adjustment module is configured to determine the compressor frequency based on the compressor pressure and trigger the compressor to run at the compressor frequency until the compressor pressure is equal to or greater than the first target pressure. The second adjustment module is configured to determine the valve opening degree according to the heat exchanger load ratio, trigger the electronic expansion valve to open according to the valve opening degree, and reacquire the compressor pressure after a first preset time period; The third adjustment module is configured to determine the parameter to be adjusted based on the reacquired compressor pressure, and trigger the component corresponding to the parameter to be adjusted to operate according to the parameter to be adjusted until the compressor pressure is greater than or equal to the second target pressure; The determining module is configured to determine a first target pressure and a second target pressure according to the air conditioning operating mode in the following manner: when the air conditioning operating mode is cooling mode, obtain the first target low pressure of the first heat exchange unit and the second target low pressure of the second heat exchange unit; determine the larger value of the first target low pressure and the second target low pressure as the first target pressure, and determine the smaller value as the second target pressure; The heat exchanger load ratio is obtained by calculating A = B / (B+C); where A is the heat exchanger load ratio, B is the demand load of the first heat exchange unit, and C is the demand load of the second heat exchange unit.
9. A multi-split air conditioner, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to, when executing the program instructions, perform the method for controlling a multi-split air conditioner as described in any one of claims 1 to 7.
10. A storage medium storing program instructions, characterized in that, When the program instructions are executed, they perform the method for controlling a multi-split air conditioner as described in any one of claims 1 to 7.