Defrosting control method and device, electronic equipment and storage medium

Abstract

The invention provides a defrosting control method and device, electronic equipment and a storage medium, and relates to the technical field of air conditioning systems. The defrosting control method comprises the following steps: calculating the total energy demand required for operation; the current operation total energy demand is calculated; according to the current operation energy demand corresponding to each non-defrosting outdoor unit and the total amount of the current operation energy demand, calculating a weight coefficient corresponding to each non-defrosting outdoor unit; according to the weight coefficient and the total required operation energy demand, the required operation energy demand corresponding to each non-defrosting outdoor unit is calculated; and the current operation energy requirement of each non-defrosting outdoor unit is allocated to the corresponding required operation energy requirement. By means of the defrosting control method, the problem that when an existing air conditioner system controls an outdoor unit to conduct defrosting, due to the fact that the total required operation energy demand of the system cannot be kept unchanged, the indoor temperature fluctuates is solved, and the effect of ensuring the comfort of the indoor environment is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning systems, and in particular to a defrosting control method, device, electronic equipment and storage medium. Background Art

[0002] There is a multi-unit air conditioning parallel system, including at least one indoor unit 100 and at least two outdoor units 200, the indoor unit 100 includes a primary liquid pipe 110, a primary low-pressure air pipe 120 and a primary high-pressure air pipe 130; the outdoor unit 200 includes a secondary liquid pipe 210, a secondary low-pressure air pipe 220 and a secondary high-pressure air pipe 230, all secondary liquid pipes 210 are connected to the primary liquid pipe 110; all secondary low-pressure air pipes 220 are connected to the primary low-pressure air pipe 120; all secondary high-pressure air pipes 230 are connected to the primary high-pressure air pipe 130.

[0003] In the existing supporting control method of this air-conditioning system, when controlling some outdoor units to defrost, the outdoor unit heat exchangers are uniformly switched from evaporators to condensers, causing the indoor heat exchangers to switch from condensers to evaporators, thereby causing the total amount of operating energy required for the system to change. As a result, the current total amount of operating energy required by the remaining outdoor units is insufficient to maintain the original working state of all indoor units, ultimately causing the indoor temperature to fluctuate and affecting the comfort of the indoor environment.

[0004] There is currently no effective technical solution to the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a defrost control method, device, electronic device and storage medium, which solves the problem that when the existing air-conditioning system controls the outdoor unit for defrosting, the total amount of operating energy required by the system cannot be kept constant, resulting in fluctuations in indoor temperature, thereby achieving the effect of ensuring the comfort of the indoor environment.

[0006] In a first aspect, the present invention provides a defrost control method, which is applied to a multi-unit air-conditioning parallel system, wherein the multi-unit air-conditioning parallel system includes at least one indoor unit and at least two outdoor units, all of the outdoor units are connected in parallel through a first pipeline, and any one of the outdoor units is connected to all of the indoor units through the first pipeline, and the defrost control method includes the following steps: Each running outdoor unit is defrosted in batches and the outdoor unit running defrost is classified as a defrost outdoor unit, and the remaining outdoor units except the defrost outdoor unit among all the running outdoor units are classified as non-defrost outdoor units. After determining the defrost outdoor unit and the non-defrost outdoor unit, perform the following steps: S1. Calculate the total required operating energy based on the current operating energy requirements of each outdoor unit in operation; S2. Calculate the total current operating energy demand according to the current operating energy demand corresponding to each non-defrosting outdoor unit; S3. Calculate the weight coefficient corresponding to each non-defrost outdoor unit according to the current operating energy required and the total current operating energy required for each non-defrost outdoor unit; S4. Calculate the required operating energy required for each non-defrosting outdoor unit according to the weight coefficient and the required total operating energy required; S5. When the defrosting outdoor unit is performing defrosting, the current operating energy demand of each of the non-defrosting outdoor units is adjusted to the corresponding required operating energy demand.

[0007] The defrost control method provided by the present invention increases the operating energy requirement of the non-defrosting outdoor unit to replace the defrosting outdoor unit to control all indoor units and keep them in their original working state, thereby avoiding changes in the total amount of operating energy required by the system, thereby avoiding fluctuations in indoor temperature and ensuring the comfort of the indoor environment.

[0008] Further, the outdoor unit includes an outdoor unit heat exchanger, a main electronic expansion valve, a first four-way valve, a second four-way valve and a fast defrost valve connected in series through a second pipeline, and a liquid-test bypass solenoid valve connected in parallel to the main electronic expansion valve; The specific steps in step S5 include: S51. Perform the following steps on each of the defrost outdoor units: S511. Control the first four-way valve to switch to a power-off state and keep the second four-way valve in a power-off state, so that the outdoor unit heat exchanger switches from operating as an evaporator to operating as a condenser; S512. Open the main electronic expansion valve to the maximum and simultaneously open the liquid bypass solenoid valve and the rapid defrost valve.

[0009] It not only increases the refrigerant flow rate, but also helps to ensure that the liquid refrigerant can flow through the system smoothly, avoiding the accumulation of liquid refrigerant that affects the defrosting effect, and helps to accelerate the circulation of the refrigerant and increase the defrosting speed.

[0010] Furthermore, after step S5, the following steps are also included: S6. When the defrosting outdoor unit is running defrosting, the following steps are performed on each of the non-defrosting outdoor units: S61. Control the first four-way valve to remain powered on and control the second four-way valve to remain powered off, so that the outdoor unit heat exchanger operates as an evaporator; S62. Increase the frequency of the compressor so that the compressor reaches the highest wind speed.

[0011] The non-defrosting outdoor unit operates as an evaporator to maintain the indoor temperature and, by raising the wind speed, to continue to supply heat to the indoor unit as much as possible and to help delay its own frost.

[0012] Furthermore, after step S5, the following steps are also included: S7. After the defrosting outdoor unit completes defrosting, control the outdoor unit heat exchanger to switch from operating as a condenser to operating as an evaporator, and classify the defrosting outdoor unit that has completed defrosting as a non-defrosting outdoor unit and return to step S1.

[0013] Furthermore, the specific steps in step S3 include: S31. Calculate the weight coefficient corresponding to each non-defrosting outdoor unit according to the following formula: ; in, is the weight coefficient corresponding to the i-th non-defrosting outdoor unit, is the current operating energy requirement corresponding to the i-th non-defrosting outdoor unit, is the total amount of energy required for current operation, is the total number of the non-defrosting outdoor units; The specific steps in step S4 include: S41. Calculate the required operating energy for each non-defrosting outdoor unit according to the following formula: ; in, is the required operating energy required for the i-th non-defrosting outdoor unit, The total amount of operating energy required.

[0014] In a second aspect, the present invention provides a defrost control device, which is applied to a multi-unit air-conditioning parallel system, wherein the multi-unit air-conditioning parallel system comprises at least one indoor unit and at least two outdoor units, all of the outdoor units are connected in parallel through a first pipeline, and any one of the outdoor units is connected to all of the indoor units through the first pipeline, and the defrost control device comprises a first control module, a first calculation module, a second calculation module, a third calculation module, a fourth calculation module and a deployment module; The first control module is used to perform defrosting on each running outdoor unit in batches and classify the outdoor units running defrosting as defrosting outdoor units, and classify the remaining outdoor units except the defrosting outdoor units among all the running outdoor units as non-defrosting outdoor units, and after determining the defrosting outdoor units and the non-defrosting outdoor units, control the first calculation module, the second calculation module, the third calculation module, the fourth calculation module and the allocation module to perform corresponding steps; The first calculation module is used to calculate the total required operating energy demand according to the current operating energy demand of each outdoor unit in operation; The second calculation module is used to calculate the total current operating energy demand according to the current operating energy demand corresponding to each of the non-defrosting outdoor units; The third calculation module is used to calculate the weight coefficient corresponding to each of the non-defrosting outdoor units according to the current operation energy demand corresponding to each of the non-defrosting outdoor units and the total current operation energy demand; The fourth calculation module is used to calculate the required operating energy requirements corresponding to each of the non-defrosting outdoor units according to the weight coefficient and the required total operating energy requirements; The allocation module is used for allocating the current operating energy demand of each of the non-defrosting outdoor units to the corresponding required operating energy demand when the defrosting outdoor unit is operating the defrosting operation.

[0015] The device provided by the present invention can add the operating energy requirements of the corresponding parts of the defrost outdoor unit to the non-defrost outdoor unit, and the non-defrost outdoor unit is responsible for controlling all outdoor units and ensuring that all outdoor units can maintain their original working conditions, thereby achieving the effect of maintaining indoor temperature and thus ensuring the comfort of the indoor environment.

[0016] In a third aspect, the present invention provides an electronic device, comprising a processor and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the steps in the defrost control method provided in the first aspect are executed.

[0017] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the defrost control method provided in the first aspect are executed.

[0018] From the above, it can be seen that the defrost control method provided by the present invention controls the non-defrosting outdoor units to make up for the missing operating energy demand caused by the defrosting of some outdoor units, so that the total operating energy demand of the system remains unchanged, thereby achieving the effect of maintaining the indoor temperature and thus ensuring the comfort of the indoor environment.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a multi-air conditioner parallel system in an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the structure of the outdoor unit in an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the structure of the indoor unit in an embodiment of the present invention.

[0023] Figure 4 A flow chart of a defrost control method provided by an embodiment of the present invention.

[0024] Figure 5 A structural schematic diagram of a defrost control device provided in an embodiment of the present invention.

[0025] Figure 6 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

[0026] Description of labels: 100, indoor unit; 110, primary liquid pipe; 120, primary low-pressure gas pipe; 130, primary high-pressure gas pipe; 200, outdoor unit; 210, secondary liquid pipe; 220, secondary low-pressure gas pipe; 230, secondary high-pressure gas pipe; 1, outdoor unit heat exchanger; 2, main electronic expansion valve; 3, refrigerant heat sink; 4, economizer; 5, auxiliary electronic expansion valve; 6, first four-way valve; 7, second four-way valve; 8, compressor; 9, oil separator; 10, unloading valve; 11, quick oil return valve; 12, gas-liquid separator; 13, spray Cooling valve; 14, liquid-test bypass solenoid valve; 15, fast defrost valve; 16, indoor unit electronic expansion valve; 17, indoor unit heat exchanger; 18, first solenoid valve; 19, second solenoid valve; 20, first control module; 21, first calculation module; 22, second calculation module; 23, third calculation module; 24, fourth calculation module; 25, allocation module; 26, second control module; 27, third control module; 1300, electronic device; 1301, processor; 1302, memory; 1303, communication bus. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0033] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] Reference Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 4 The present invention provides a defrost control method, which is applied to a multi-unit air conditioner parallel system. The multi-unit air conditioner parallel system includes at least one indoor unit 100 and at least two outdoor units 200. All outdoor units 200 are connected in parallel through a first pipeline, and any outdoor unit 200 is connected to all indoor units 100 through the first pipeline. The defrost control method includes the following steps: Run defrost for each running outdoor unit in batches and classify the outdoor units running defrost as defrost outdoor units. At the same time, classify the remaining outdoor units except the defrost outdoor units among all the running outdoor units as non-defrost outdoor units. After determining the defrost outdoor units and non-defrost outdoor units, perform the following steps: S1. Calculate the total required operating energy based on the current operating energy requirements of each outdoor unit in operation; S2. Calculate the total current operating energy demand according to the current operating energy demand corresponding to each non-defrosting outdoor unit; S3. Calculate the weight coefficient corresponding to each non-defrosting outdoor unit according to the current operating energy demand and the total current operating energy demand corresponding to each non-defrosting outdoor unit; S4. Calculate the required operating energy for each non-defrosting outdoor unit according to the weight coefficient and the total required operating energy; S5. When the defrosting outdoor unit is operating to defrost, the current operating energy demand of each non-defrosting outdoor unit is allocated to the corresponding required operating energy demand.

[0035] Specifically, the indoor unit 100 includes a first-level liquid pipe 110, a first-level low-pressure air pipe 120 and a first-level high-pressure air pipe 130; the outdoor unit 200 includes a second-level liquid pipe 210, a second-level low-pressure air pipe 220 and a second-level high-pressure air pipe 230, all of the second-level liquid pipes 210 are connected to the first-level liquid pipe 110; all of the second-level low-pressure air pipes 220 are connected to the first-level low-pressure air pipe 120; and all of the second-level high-pressure air pipes 230 are connected to the first-level high-pressure air pipe 130.

[0036] In this embodiment, in actual application, based on the structure of the above-mentioned multi-unit air-conditioning parallel system, each outdoor unit 200 can independently control all indoor units 100, so that when the defrost outdoor unit is running defrosting, the non-defrost outdoor unit can be controlled to increase its current operating energy demand to make up for the missing operating energy demand, thereby keeping the total required operating energy demand of the system unchanged, thereby achieving the effect of maintaining the indoor temperature and ensuring the comfort of the indoor environment.

[0037] Specifically, after determining the weight coefficient of each non-defrost outdoor unit according to the total required operating energy demand, the total required operating energy demand is redistributed to each non-defrost outdoor unit according to the weight coefficient, thereby superimposing the operating energy demand of the corresponding part of the defrost outdoor unit on the non-defrost outdoor unit, and the non-defrost outdoor unit is responsible for controlling all outdoor units and ensuring that all outdoor units can maintain their original working state.

[0038] It should be noted that, in actual application, at least one outdoor unit is guaranteed to remain as a non-defrost outdoor unit; to ensure that the non-defrost outdoor unit is sufficient to make up for the operating energy demand of the defrost outdoor unit, generally only one outdoor unit is controlled to be a defrost outdoor unit to run defrosting each time (when the non-defrost outdoor unit is sufficient to make up for the operating energy demand of multiple defrost outdoor units, it is allowed to control multiple outdoor units to run defrosting at the same time), and each running outdoor unit rotates as a defrost outdoor unit, and after multiple rotations, all running outdoor units will eventually run at least one defrost.

[0039] In certain embodiments, referring to Figure 2 The outdoor unit 200 includes an outdoor unit heat exchanger 1, a main electronic expansion valve 2, a first four-way valve 6, a second four-way valve 7 and a fast defrost valve 15 connected in series through a second pipeline, and a liquid-test bypass solenoid valve 14 connected in parallel to the main electronic expansion valve 2; The specific steps in step S5 include: S51. Perform the following steps on each defrost outdoor unit: S511. Control the first four-way valve to switch to the power-off state and keep the second four-way valve in the power-off state, so that the outdoor unit heat exchanger switches from operating as an evaporator to operating as a condenser; S512. Open the main electronic expansion valve to the maximum and open the liquid bypass solenoid valve and the quick defrost valve at the same time.

[0040] Specifically, the outdoor unit 200 further includes a refrigerant heat sink 3, an economizer 4, an auxiliary circuit electronic expansion valve 5, a compressor 8, an oil separator 9, an unloading valve 10, a quick oil return valve 11, a gas-liquid separator 12 and a liquid spray cooling valve 13; The first end of the secondary liquid pipe 210 is connected to the second end of the refrigerant heat sink 3 through the economizer 4, the first end of the refrigerant heat sink 3 is connected to the second end of the main electronic expansion valve 2, the first end of the main electronic expansion valve 2 is connected to the second end of the outdoor heat exchanger 1, and the first end of the outdoor heat exchanger 1 is connected to the fourth end of the first four-way valve 6; The first end of the secondary liquid pipe 210 is also connected to the second end of the auxiliary circuit electronic expansion valve 5, and the first end of the auxiliary circuit electronic expansion valve 5 is connected to the air supply port of the compressor 8 through the economizer 4; The first end of the secondary liquid pipe 210 is also connected to the first end of the first four-way valve 6, the second end of the first four-way valve 6, the fourth end of the second four-way valve 7, the first end of the second four-way valve 7, the inlet of the gas-liquid separator 12, the first end of the secondary low-pressure gas pipe 220 and the second end of the unloading valve 10; the third end of the first four-way valve 6 is connected to the third end of the second four-way valve 7; the second end of the second four-way valve 7 is connected to the secondary high-pressure gas pipe 230; The first end of the secondary liquid pipe 210 is also connected to the second end of the liquid spray cooling valve 13, and the first end of the liquid spray cooling valve 13 is simultaneously connected to the outlet of the gas-liquid separator 12, the second end of the quick oil return valve 11, the return air port of the compressor 8 and the second oil outlet of the oil separator 9, the exhaust port of the compressor 8 is connected to the oil and gas inlet of the oil separator 9, the air outlet of the oil separator 9 is simultaneously connected to the third end of the first four-way valve 6, the third end of the second four-way valve 7 and the first end of the unloading valve 10, and the first oil outlet of the oil separator 9 is connected to the first end of the quick oil return valve 11; The liquid-test bypass solenoid valve 14 is connected in parallel to the main electronic expansion valve 2; the second end of the quick defrost valve 15 is connected to the first end of the secondary liquid pipe 210, and the first end of the quick defrost valve 15 is simultaneously connected to the first end of the first four-way valve 6, the second end of the first four-way valve 6, the fourth end of the second four-way valve 7, the first end of the second four-way valve 7, the inlet of the gas-liquid separator 12, the first end of the secondary low-pressure gas pipe 220 and the second end of the unloading valve 10.

[0041] In this embodiment, in actual application, the defrost outdoor unit operating as a condenser can absorb outdoor heat to melt the frost on the surface of the outdoor unit heat exchanger 1, thereby achieving the effect of improving the defrost efficiency; further, opening the main electronic expansion valve 2 to the maximum, and opening the liquid bypass solenoid valve 14 and the quick defrost valve 15 at the same time can not only increase the refrigerant flow rate, but also help to ensure that the liquid refrigerant can flow through the system smoothly, avoid the accumulation of liquid refrigerant and affect the defrost effect, and help to accelerate the circulation of the refrigerant, further improve the defrost speed, which is beneficial to reduce energy consumption and further improve the defrost efficiency.

[0042] In certain embodiments, referring to Figure 2 The outdoor unit 200 further includes a compressor 8; the indoor unit 100 includes an indoor unit heat exchanger 17, and a primary low-pressure gas pipe 120 and a primary high-pressure gas pipe 130 connected to the first pipeline, the primary low-pressure gas pipe 120 and the primary high-pressure gas pipe 130 are connected to the indoor unit heat exchanger 17 after being connected in parallel, the primary high-pressure gas pipe 130 is provided with a first solenoid valve 18, and the primary low-pressure gas pipe 120 is provided with a second solenoid valve 19; Specifically, the indoor unit 100 further includes an indoor unit electronic expansion valve 16, a first solenoid valve 18 and a second solenoid valve 19; The first-level liquid pipe 110 is simultaneously connected to the second ends of all the second-level liquid pipes 210 and the first ends of all the indoor electronic expansion valves 16, the second ends of the indoor electronic expansion valves 16 are connected to the first ends of the indoor heat exchangers 17, and the second ends of the indoor heat exchangers 17 are simultaneously connected to the second ends of the first solenoid valve 18 and the second ends of the second solenoid valves 19; The primary low-pressure air pipe 120 is simultaneously connected to the second ends of all the secondary low-pressure air pipes 220 and the first end of the second solenoid valve 19; The primary high-pressure gas pipe 130 is simultaneously connected to the second ends of all the secondary high-pressure gas pipes 230 and the first end of the first solenoid valve 18 .

[0043] In some embodiments, step S5 further includes the following steps: S6. When the defrosting outdoor unit is running defrosting, perform the following steps for each non-defrosting outdoor unit: S61. Control the first four-way valve to remain powered on and control the second four-way valve to remain powered off so that the outdoor unit heat exchanger operates as an evaporator; S62. Increase the frequency of the compressor so that the compressor reaches the highest wind speed.

[0044] In this embodiment, in actual application, the non-defrosting outdoor unit operates as an evaporator to maintain the control of the indoor temperature. At the same time, by increasing the wind speed of the compressor 8 (the compressor 8 includes a fan, and the speed of the fan is divided into different wind speeds. The higher the wind speed, the greater the fan speed and the greater the wind speed generated), it is possible to continue to supply heat to the indoor unit 100 and help delay its own frost.

[0045] In some embodiments, step S5 further includes the following steps: S7. After the defrosting outdoor unit completes defrosting, control the outdoor unit heat exchanger to switch from operating as a condenser to operating as an evaporator, and classify the defrosting outdoor unit that has completed defrosting as a non-defrosting outdoor unit and return to step S1.

[0046] In this embodiment, each running outdoor unit is rotated to serve as a defrosting outdoor unit, and after multiple rotations, all the running outdoor units are finally allowed to perform defrosting at least once.

[0047] In some embodiments, the specific steps in step S3 include: S31. Calculate the weight coefficient corresponding to each non-defrosting outdoor unit according to the following formula: ; in, is the weight coefficient corresponding to the i-th non-defrosting outdoor unit, is the current operating energy requirement corresponding to the i-th non-defrosting outdoor unit, is the total energy required for current operation, is the total number of non-defrosting outdoor units; The specific steps in step S4 include: S41. Calculate the required operating energy for each non-defrosting outdoor unit according to the following formula: ; in, is the required operating energy for the i-th non-defrosting outdoor unit, The total amount of operating energy required.

[0048] Please refer to Figure 5 , Figure 5 A defrost control device in some embodiments of the present invention is applied to a multi-unit air-conditioning parallel system, wherein the multi-unit air-conditioning parallel system comprises at least one indoor unit 100 and at least two outdoor units 200, all the outdoor units 200 are connected in parallel through a first pipeline, and any one of the outdoor units 200 is connected to all the indoor units 100 through the first pipeline, and the defrost control device is integrated in a back-end control device in the form of a computer program, and comprises a first control module 20, a first calculation module 21, a second calculation module 22, a third calculation module 23, a fourth calculation module 24 and a deployment module 25; The first control module 20 is used to perform defrosting on each running outdoor unit in batches and classify the outdoor units running defrosting as defrosting outdoor units, and classify the remaining outdoor units except the defrosting outdoor units among all the running outdoor units as non-defrosting outdoor units, and after determining the defrosting outdoor units and the non-defrosting outdoor units, control the first calculation module 21, the second calculation module 22, the third calculation module 23, the fourth calculation module 24 and the allocation module 25 to perform corresponding steps; The first calculation module 21 is used to calculate the total required operating energy demand according to the current operating energy demand of each outdoor unit in operation; The second calculation module 22 is used to calculate the total current operating energy demand according to the current operating energy demand corresponding to each non-defrosting outdoor unit; The third calculation module 23 is used to calculate the weight coefficient corresponding to each non-defrosting outdoor unit according to the current operation energy demand corresponding to each non-defrosting outdoor unit and the total current operation energy demand; The fourth calculation module 24 is used to calculate the required operating energy requirements corresponding to each non-defrosting outdoor unit according to the weight coefficient and the total required operating energy requirements; The allocation module 25 is used to allocate the current operating energy demand of each non-defrosting outdoor unit to the corresponding required operating energy demand when the defrosting outdoor unit is operating the defrosting operation.

[0049] In some embodiments, the allocation module 25 is used to allocate the current operating energy demand of each non-defrosting outdoor unit to the corresponding required operating energy demand when the defrosting outdoor unit is running defrosting: S51. Perform the following steps on each defrost outdoor unit: S511. Control the first four-way valve to switch to the power-off state and keep the second four-way valve in the power-off state, so that the outdoor unit heat exchanger switches from operating as an evaporator to operating as a condenser; S512. Open the main electronic expansion valve to the maximum and open the liquid bypass solenoid valve and the quick defrost valve at the same time.

[0050] In some embodiments, the defrost control device further includes a second control module 26, and the second control module 26 is used to execute the following operations on each non-defrost outdoor unit when the defrost outdoor unit is running defrosting: S61. Control the first four-way valve to remain powered on and control the second four-way valve to remain powered off so that the outdoor unit heat exchanger operates as an evaporator; S62. Increase the frequency of the compressor so that the compressor reaches the highest wind speed.

[0051] In some embodiments, the defrost control device also includes a third control module 27, which is used to control the outdoor unit heat exchanger to switch from operating as a condenser to operating as an evaporator after the defrost outdoor unit completes defrosting, and classify the defrost outdoor unit that has completed defrosting as a non-defrost outdoor unit and return to execute step S1.

[0052] In some embodiments, the third calculation module 23 is used to calculate the weight coefficient corresponding to each non-defrost outdoor unit according to the current operation energy demand and the total current operation energy demand corresponding to each non-defrost outdoor unit, and executes: S31. Calculate the weight coefficient corresponding to each non-defrosting outdoor unit according to the following formula: ; in, is the weight coefficient corresponding to the i-th non-defrosting outdoor unit, is the current operating energy requirement corresponding to the i-th non-defrosting outdoor unit, is the total energy required for current operation, is the total number of non-defrosting outdoor units; The fourth calculation module 24 is used to calculate the required operating energy required for each non-defrosting outdoor unit according to the weight coefficient and the required total operating energy required: S41. Calculate the required operating energy for each non-defrosting outdoor unit according to the following formula: ; in, is the required operating energy for the i-th non-defrosting outdoor unit, The total amount of operating energy required.

[0053] Please refer to Figure 6 , Figure 6The present invention provides a structural schematic diagram of an electronic device provided by an embodiment of the present invention. The present invention provides an electronic device 1300, including: a processor 1301 and a memory 1302. The processor 1301 and the memory 1302 are interconnected and communicate with each other through a communication bus 1303 and / or other forms of connection mechanisms (not shown). The memory 1302 stores computer-readable instructions executable by the processor 1301. When the electronic device is running, the processor 1301 executes the computer-readable instructions to execute the defrosting control method in any optional implementation of the above-mentioned embodiment. , in order to achieve the following functions: calculate the total required operating energy demand according to the current operating energy demand of each running outdoor unit; calculate the current total operating energy demand according to the current operating energy demand corresponding to each non-defrost outdoor unit; calculate the weight coefficient corresponding to each non-defrost outdoor unit according to the current operating energy demand corresponding to each non-defrost outdoor unit and the current total operating energy demand; calculate the required operating energy demand corresponding to each non-defrost outdoor unit according to the weight coefficient and the total required operating energy demand; when the defrost outdoor unit is defrosting, allocate the current operating energy demand of each non-defrost outdoor unit to the corresponding required operating energy demand.

[0054] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the defrost control method in any optional implementation of the above-mentioned embodiment is executed to achieve the following functions: calculating the total required operating energy demand according to the current operating energy demand of each operating outdoor unit; calculating the total current operating energy demand according to the current operating energy demand corresponding to each non-defrost outdoor unit; calculating the weight coefficient corresponding to each non-defrost outdoor unit according to the current operating energy demand corresponding to each non-defrost outdoor unit and the total current operating energy demand; calculating the required operating energy demand corresponding to each non-defrost outdoor unit according to the weight coefficient and the total required operating energy demand; and when the defrost outdoor unit is defrosting, allocating the current operating energy demand of each non-defrost outdoor unit to the corresponding required operating energy demand.

[0055] Among them, the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable red-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0056] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0057] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0058] Furthermore, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0059] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0060] Descriptions with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" are intended to mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] The above description is only an embodiment of the present invention and is not intended to limit the protection scope of the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A defrost control method, applied to a multi-unit air-conditioning parallel system, the multi-unit air-conditioning parallel system comprising at least one indoor unit (100) and at least two outdoor units (200), all the outdoor units (200) are connected in parallel via a first pipeline and any one of the outdoor units (200) is connected to all the indoor units (100) via the first pipeline, characterized in that: The defrost control method comprises the following steps: Each running outdoor unit is defrosted in batches and the outdoor unit running defrost is classified as a defrost outdoor unit, and the remaining outdoor units except the defrost outdoor unit among all the running outdoor units are classified as non-defrost outdoor units. After determining the defrost outdoor unit and the non-defrost outdoor unit, perform the following steps: S1. Calculate the total required operating energy based on the current operating energy requirements of each outdoor unit in operation; S2. Calculate the total current operating energy demand according to the current operating energy demand corresponding to each non-defrosting outdoor unit; S3. Calculate the weight coefficient corresponding to each non-defrost outdoor unit according to the current operating energy required and the total current operating energy required for each non-defrost outdoor unit; S4. Calculate the required operating energy required for each non-defrosting outdoor unit according to the weight coefficient and the required total operating energy required; S5. When the defrosting outdoor unit is performing defrosting, the current operating energy demand of each of the non-defrosting outdoor units is adjusted to the corresponding required operating energy demand.

2. The defrost control method according to claim 1, characterized in that: The outdoor unit (200) comprises an outdoor unit heat exchanger (1), a main electronic expansion valve (2), a first four-way valve (6), a second four-way valve (7) and a fast defrost valve (15) connected in series via a second pipeline, and a liquid-sensing bypass solenoid valve (14) connected in parallel to the main electronic expansion valve (2); The specific steps in step S5 include: S51. Perform the following steps on each of the defrost outdoor units: S511. Control the first four-way valve to switch to a power-off state and keep the second four-way valve in a power-off state, so that the outdoor unit heat exchanger switches from operating as an evaporator to operating as a condenser; S512. Open the main electronic expansion valve to the maximum and simultaneously open the liquid bypass solenoid valve and the rapid defrost valve.

3. The defrost control method according to claim 2, characterized in that: After step S5, the following steps are also included: S6. When the defrosting outdoor unit is running defrosting, the following steps are performed on each of the non-defrosting outdoor units: S61. Control the first four-way valve to remain powered on and control the second four-way valve to remain powered off, so that the outdoor unit heat exchanger operates as an evaporator; S62. Increase the frequency of the compressor so that the compressor reaches the highest wind speed.

4. The defrost control method according to claim 1, characterized in that: After step S5, the following steps are also included: S7. After the defrosting outdoor unit completes defrosting, control the outdoor unit heat exchanger to switch from operating as a condenser to operating as an evaporator, and classify the defrosting outdoor unit that has completed defrosting as a non-defrosting outdoor unit and return to step S1.

5. The defrost control method according to claim 1, characterized in that: The specific steps in step S3 include: S31. Calculate the weight coefficient corresponding to each non-defrosting outdoor unit according to the following formula: ； in, is the weight coefficient corresponding to the i-th non-defrosting outdoor unit, is the current operating energy requirement corresponding to the i-th non-defrosting outdoor unit, is the total amount of energy required for current operation, is the total number of the non-defrosting outdoor units; The specific steps in step S4 include: S41. Calculate the required operating energy for each non-defrosting outdoor unit according to the following formula: ； in, is the required operating energy required for the i-th non-defrosting outdoor unit, The total amount of operating energy required.

6. A defrost control device, applied to a multi-unit air-conditioning parallel system, the multi-unit air-conditioning parallel system comprising at least one indoor unit (100) and at least two outdoor units (200), all the outdoor units (200) are connected in parallel via a first pipeline, and any one of the outdoor units (200) is connected to all the indoor units (100) via the first pipeline, characterized in that: The defrost control device comprises a first control module, a first calculation module, a second calculation module, a third calculation module, a fourth calculation module and a deployment module; The first control module is used to perform defrosting on each running outdoor unit in batches and classify the outdoor units running defrosting as defrosting outdoor units, and classify the remaining outdoor units except the defrosting outdoor units among all the running outdoor units as non-defrosting outdoor units, and after determining the defrosting outdoor units and the non-defrosting outdoor units, control the first calculation module, the second calculation module, the third calculation module, the fourth calculation module and the allocation module to perform corresponding steps; The first calculation module is used to calculate the total required operating energy demand according to the current operating energy demand of each outdoor unit in operation; The second calculation module is used to calculate the total current operating energy demand according to the current operating energy demand corresponding to each of the non-defrosting outdoor units; The third calculation module is used to calculate the weight coefficient corresponding to each of the non-defrosting outdoor units according to the current operation energy demand corresponding to each of the non-defrosting outdoor units and the total current operation energy demand; The fourth calculation module is used to calculate the required operating energy requirements corresponding to each of the non-defrosting outdoor units according to the weight coefficient and the required total operating energy requirements; The allocation module is used for allocating the current operating energy demand of each non-defrosting outdoor unit to the corresponding required operating energy demand when the defrosting outdoor unit is operating the defrosting operation.

7. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores computer-readable instructions. When the computer-readable instructions are executed by the processor, the steps in the defrost control method according to any one of claims 1 to 5 are executed.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, the steps of the defrost control method according to any one of claims 1 to 5 are executed.

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