Control method and device for optimizing refrigeration effect of multi-split unit and multi-split unit

Abstract

The present invention relates to the field of air conditioning technology, and in particular, to a control method, device, and multi-split unit for optimizing the refrigeration effect of a multi-split unit. The control method for optimizing the refrigeration effect of a multi-split unit includes: if the outdoor temperature is greater than or equal to a preset temperature threshold, then calculating the temperature deviation and the temperature deviation average value of each refrigeration unit; judging whether there is a refrigeration unit that meets the pre-judgment condition: the temperature deviation is greater than or equal to the preset deviation threshold, or the temperature deviation is less than or equal to the quotient of the temperature deviation average value and the proportional adjustment value; if so, judging whether the refrigeration unit that meets the pre-judgment condition meets the pseudo-demand determination condition or the large selection determination condition; controlling the refrigeration unit that meets the pseudo-demand determination condition according to the pseudo-demand control method, and controlling the refrigeration unit that meets the large selection determination condition according to the large selection control method. The control method, device, and multi-split unit for optimizing the refrigeration effect of a multi-split unit provided by the present invention can improve the refrigeration effect.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method and device for optimizing the refrigeration effect of a multi-split unit and a multi-split unit. Background Art

[0002] Multi-split air conditioners are mostly composed of several outdoor units towing multiple indoor units. The multiple indoor units are installed in different rooms. The multiple indoor units adjust their respective refrigerant flow rates through their respective electronic expansion valves, thereby adjusting the temperature in different rooms.

[0003] For the situation where some indoor units are installed in open areas (elevator halls, corridors), tall atriums and other areas with large loads, since the temperature in the above-mentioned areas is actually difficult to lower, there is no need and no way to lower the temperature in the corresponding areas very low. If the indoor units in this area are controlled normally (fan speed, superheat), when cooling in a high-temperature environment, due to its higher ambient temperature than other areas, the valve opening of the corresponding indoor unit is larger and more refrigerant is allocated. In other words, the pseudo-demand of the corresponding indoor unit is high, which will lead to insufficient refrigerant allocation to other indoor units and affect the cooling effect; and for the situation where some indoor units are large in size, because their electronic expansion valve diameter and initial valve step are larger than other indoor units, their actual refrigerant flow rate is higher than the required flow rate, which will also lead to insufficient refrigerant allocation to other indoor units and affect the cooling effect. Summary of the Invention

[0004] The object of the present invention is to provide a control method, device and multi-split unit for optimizing the refrigeration effect of the multi-split unit, so as to alleviate the technical problem of poor refrigeration effect in high temperature environment existing in the prior art multi-split unit.

[0005] The control method for optimizing the refrigeration effect of a multi-unit refrigeration system provided by the present invention includes:

[0006] Get the outdoor temperature, the set temperature of each refrigeration unit and the actual temperature of the room where it is located;

[0007] If the outdoor temperature is greater than or equal to a preset temperature threshold, the difference between the actual temperature of the room where each refrigeration unit is located and the set temperature is calculated to obtain the temperature deviation of each refrigeration unit; the average value of the temperature deviations of all the refrigeration units is calculated to obtain the average temperature deviation value;

[0008] Determining whether there is a refrigeration unit that meets a pre-determination condition, wherein the pre-determination condition includes that the temperature deviation of the refrigeration unit is greater than or equal to a preset deviation threshold, or that the temperature deviation of the refrigeration unit is less than or equal to the quotient of the temperature deviation average value and the proportional adjustment value;

[0009] If so, it is determined that there is an indoor unit with high pseudo-demand or an indoor unit with a large selection, and it is determined whether the refrigeration indoor unit that meets the pre-judgment condition meets the pseudo-demand determination condition or the large selection determination condition;

[0010] If the refrigeration indoor unit meets the pseudo-demand determination condition, the refrigeration indoor unit that meets the pseudo-demand determination condition is determined as the indoor unit with high pseudo-demand, and the indoor unit with high pseudo-demand is controlled according to the pseudo-demand control method;

[0011] If the refrigeration indoor unit meets the large selection determination condition, the refrigeration indoor unit meeting the large selection determination condition is determined as a large selection indoor unit, and the large selection indoor unit is controlled according to the large selection control method.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention provides a control method for optimizing the refrigeration effect of a multi-split unit. When the outdoor temperature is high, the method can identify special indoor units with high pseudo-demand and large selection, and perform corresponding special control on them, thereby optimizing the refrigeration effect of each refrigeration indoor unit. Moreover, the above method can be implemented using existing air-conditioning products without the need for additional components, which can save costs.

[0014] As an implementable embodiment, the method further includes: calculating an average value of actual temperatures of all rooms where the refrigeration units are located to obtain an average actual temperature value;

[0015] The pseudo-demand determination condition includes: the actual temperature of the room where the refrigeration unit is located is greater than or equal to the sum of the actual temperature average value and the temperature adjustment value; and / or the selection large determination condition includes: the actual temperature of the room where the refrigeration unit is located is less than the actual temperature average value.

[0016] The beneficial effect is that the indoor units with high pseudo-demand and the indoor units with large selection can be determined.

[0017] As an implementable embodiment, the large-scale control method for selection includes:

[0018] Obtaining the number of refrigeration indoor units and the total number of indoor units;

[0019] Calculating the ratio of the number of the refrigeration indoor units to the total number of the indoor units to obtain the indoor unit simultaneous start-up rate;

[0020] If the co-opening rate of the indoor units is greater than or equal to a preset co-opening rate threshold, the wind speed of the indoor unit with the larger selected type is controlled to increase and the opening of the expansion valve is controlled to decrease.

[0021] The beneficial effect is that by controlling the expansion valve opening of the large-sized indoor unit to decrease, the refrigerant flow of the indoor unit can be reduced, thereby increasing the refrigerant flow of other indoor units and improving the cooling effect of other rooms.

[0022] As an implementable embodiment, controlling the wind speed of the indoor unit with a larger selection to increase and the expansion valve opening to decrease includes: controlling the wind speed of the indoor unit with a larger selection to increase by one level and reducing the expansion valve opening to half of the current opening.

[0023] The beneficial effect is that better control effect can be obtained.

[0024] As an implementable embodiment, the pseudo-demand control method includes: controlling the wind speed of the indoor unit with high pseudo-demand to decrease and reducing the opening of the expansion valve.

[0025] The beneficial effect is that by controlling the expansion valve of the indoor unit with high pseudo-demand to reduce the opening, the refrigerant flow of the corresponding indoor unit can be reduced to increase the amount of refrigerant allocated to other indoor units and improve the cooling effect of other rooms; at the same time, the indoor unit with high pseudo-demand can be controlled to lower the wind speed to reduce the air circulation rate in the corresponding area, ensure the air outlet temperature of the indoor unit with high pseudo-demand, and reduce cooling waste.

[0026] As an implementable embodiment, controlling the wind speed of the indoor unit with high pseudo demand to decrease and the opening of the expansion valve to reduce includes: controlling the wind speed of the indoor unit with high pseudo demand to decrease by one level and reducing the opening of the expansion valve to half of the current opening.

[0027] The beneficial effect is that better control effect can be obtained.

[0028] As an implementable embodiment, the preset temperature threshold value ranges from 35 to 40°C, preferably 38°C; and / or the preset deviation threshold value ranges from 6 to 10°C, and / or the proportional adjustment value ranges from 3 to 5.

[0029] The beneficial effect is that better control effect can be obtained.

[0030] As an implementable embodiment, the temperature adjustment value ranges from 5 to 8°C.

[0031] The beneficial effect is that better control effect can be obtained.

[0032] As an implementable embodiment, the value range of the indoor unit simultaneous opening rate is 60-80%, preferably 70%.

[0033] The beneficial effect is that better control effect can be obtained.

[0034] The control device for optimizing the refrigeration effect of a multi-unit refrigeration system provided by the present invention comprises:

[0035] The acquisition module is used to obtain the outdoor temperature, the set temperature of each refrigeration unit and the actual temperature of the room in which it is located;

[0036] a calculation module, configured to calculate, under the condition that the outdoor temperature is greater than or equal to a preset temperature threshold, a difference between an actual temperature of a room in which each of the refrigeration units is located and a set temperature, to obtain a temperature deviation of each of the refrigeration units; and calculate an average of the temperature deviations of all the refrigeration units to obtain an average temperature deviation;

[0037] a prejudgment module, configured to determine whether there is a refrigeration unit that meets a prejudgment condition, wherein the prejudgment condition includes that the temperature deviation of the refrigeration unit is greater than or equal to a preset deviation threshold, or that the temperature deviation of the refrigeration unit is less than or equal to the quotient of the temperature deviation average value and the proportional adjustment value; and to determine whether the refrigeration unit that meets the prejudgment condition meets a pseudo-demand determination condition or a large selection determination condition;

[0038] a determination module, configured to determine the refrigeration indoor unit that meets the pseudo-demand determination condition as the indoor unit with the high pseudo-demand, and to determine the refrigeration indoor unit that meets the large selection determination condition as the indoor unit with the large selection;

[0039] The control module is used to control the indoor unit with high pseudo-demand according to the pseudo-demand control method, and is used to control the indoor unit with large selection according to the large selection control method.

[0040] The air conditioner provided by the present invention includes a computer-readable storage medium storing a computer program and a processor. When the computer program is read and executed by the processor, the control method for optimizing the refrigeration effect of the multi-split unit is implemented.

[0041] The computer-readable storage medium provided by the present invention stores a computer program, and when the computer program is read and executed by a processor, the control method for optimizing the refrigeration effect of the multi-unit refrigeration system is implemented.

[0042] The control device, air conditioner and computer-readable storage medium for optimizing the refrigeration effect of a multi-split unit provided by the present invention can implement the above-mentioned control method for optimizing the refrigeration effect of a multi-split unit, and can achieve the same technical effect as the above-mentioned control method for optimizing the refrigeration effect of a multi-split unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0044] Figure 1 A first schematic flow chart of a control method for optimizing the refrigeration effect of a multi-unit refrigeration unit provided in an embodiment of the present invention;

[0045] Figure 2 A second schematic flow chart of a control method for optimizing the refrigeration effect of a multi-unit refrigeration system provided in an embodiment of the present invention;

[0046] Figure 3 A schematic structural diagram of a control device for optimizing the refrigeration effect of a multi-unit refrigeration unit provided in an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 301 - acquisition module; 302 - calculation module; 303 - prediction module; 304 - determination module; 305 - control module. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0051] Figure 1 A flow chart of a control method for optimizing the refrigeration effect of a multi-unit refrigeration system provided in an embodiment of the present invention includes:

[0052] S102, obtaining the outdoor temperature, the set temperature of each refrigeration unit and the actual temperature of the room in which it is located.

[0053] When the outdoor temperature is greater than or equal to the preset temperature threshold, it can be regarded as a high temperature environment and the load of the multi-split system is large.

[0054] In step S104, if the outdoor temperature is greater than or equal to a preset temperature threshold, the difference between the actual temperature of each room in which the refrigeration unit is located and the set temperature is calculated to obtain the temperature deviation of each refrigeration unit. The average of the temperature deviations of all refrigeration units is calculated to obtain the average temperature deviation. The preset temperature threshold is set to a value range of 35 to 40°C, preferably 38°C.

[0055] S106, determining whether there is a refrigeration unit that meets the pre-judgment condition, where the pre-judgment condition includes that the temperature deviation of the refrigeration unit is greater than or equal to a preset deviation threshold, or that the temperature deviation of the refrigeration unit is less than or equal to the quotient of the temperature deviation average value and the proportional adjustment value.

[0056] If the temperature deviation of the refrigeration unit is greater than or equal to the preset deviation threshold, it indicates that the actual temperature of the room where the refrigeration unit is located is much higher than the set temperature, and the room temperature is difficult to drop. The refrigeration unit may be a unit with high pseudo-demand. If the temperature deviation of the refrigeration unit is less than or equal to the quotient of the average temperature deviation and the proportional adjustment value, it indicates that the cooling effect of the room where the refrigeration unit is located is better, and the selected refrigeration unit may be larger than other refrigeration units.

[0057] S108: If yes, it is determined that there is an indoor unit with high pseudo-demand or an indoor unit with a large selection size, and it is determined whether the refrigeration indoor unit that meets the pre-judgment condition meets the pseudo-demand determination condition or the large selection determination condition.

[0058] S110: If the refrigeration indoor unit meets the pseudo-demand determination condition, the refrigeration indoor unit meeting the pseudo-demand determination condition is determined as an indoor unit with high pseudo-demand, and the indoor unit with high pseudo-demand is controlled according to the pseudo-demand control method.

[0059] The temperature in the area where the indoor unit with high pseudo-demand is located is difficult to lower or there is no need to lower it. Therefore, there is no need for excessive cooling. When the outdoor temperature is high, the indoor unit with high pseudo-demand can be specially controlled according to the pseudo-demand control method to reduce the refrigerant flow of the corresponding indoor unit to increase the amount of refrigerant allocated to other indoor units and improve the cooling effect of other rooms.

[0060] S112: If the refrigeration indoor unit meets the large selection determination condition, the refrigeration indoor unit meeting the large selection determination condition is determined as a large selection indoor unit, and the large selection indoor unit is controlled according to the large selection control method.

[0061] The actual flow rate of the large-sized indoor unit is higher than its required flow rate. Therefore, when the outdoor temperature is high, the large-sized indoor unit can be specially controlled according to the large-sized control method to meet the refrigerant flow requirements of other indoor units and ensure the cooling effect of other rooms.

[0062] Therefore, this embodiment provides a control method for optimizing the refrigeration effect of a multi-split unit. When the outdoor temperature is high, it can identify special indoor units with high pseudo-demand and large selection, and perform corresponding special control on them, thereby optimizing the cooling effect of each refrigeration indoor unit. Moreover, the above method can be implemented using existing air-conditioning products without the need for additional components, which can save costs.

[0063] The above method may further include: calculating an average value of actual temperatures of the rooms where all the refrigeration indoor units are located to obtain an average actual temperature value.

[0064] The pseudo demand determination condition may include: the actual temperature of the room where the refrigeration indoor unit is located is greater than or equal to the sum of the actual temperature average value and the temperature adjustment value.

[0065] It should be noted that when the actual temperature of the room where a certain refrigeration unit is located is greater than or equal to the sum of the average value of the rooms where all refrigeration units are located and the temperature adjustment value, it indicates that the actual temperature of the room where the refrigeration unit is located is much higher than the actual temperatures of other rooms. On this basis, if the temperature deviation of the refrigeration unit is greater than or equal to the preset deviation threshold, it indicates that the actual temperature of the room where the refrigeration unit is located deviates greatly from the set temperature, and the room temperature is difficult to drop. At this time, the unit in the room where the refrigeration unit is located can be determined as a unit with high pseudo-demand; if the temperature deviation of the refrigeration unit is less than or equal to the quotient of the average temperature deviation and the proportional adjustment value, it indicates that the set temperature of the room where the refrigeration unit is located is high, and the room where the refrigeration unit is located does not need too much cooling capacity. The unit in the room where the refrigeration unit is located can also be determined as a unit with high pseudo-demand.

[0066] The selection criteria may include: the actual temperature of the room where the refrigeration unit is located is lower than the average actual temperature.

[0067] It should be noted that when the actual temperature of the room where a certain refrigeration unit is located is lower than the average value of the rooms where all refrigeration units are located, it indicates that the actual temperature of the room where the refrigeration unit is located is lower than the actual temperatures of other rooms. At this time, the unit in the room where the refrigeration unit is located can be determined as the large-size unit.

[0068] The above-mentioned large-scale control method may specifically include:

[0069] A1. Obtain the number of refrigeration indoor units and the total number of indoor units.

[0070] A2. Calculate the ratio of the number of indoor refrigeration units to the total number of indoor units to obtain the indoor unit simultaneous start-up rate.

[0071] A3: If the indoor unit co-operation rate is greater than or equal to a preset co-operation rate threshold, the wind speed of the larger indoor unit is increased and the expansion valve opening is decreased. The preset co-operation rate threshold can be set to a value between 60% and 80%, preferably 70%. Specifically, the wind speed of the larger indoor unit can be increased by one level and the expansion valve opening can be decreased to half of the current opening.

[0072] When the outdoor temperature and the opening rate of indoor units are both high, the load of the multi-split unit is large. If a certain refrigeration indoor unit is selected with a large model, the refrigerant flow of other indoor units will be small and the cooling effect will be poor. At this time, the wind speed of the indoor unit with a large model is controlled to increase to increase the air circulation rate of the room where it is located. At the same time, the expansion valve opening of the indoor unit with a large model is controlled to decrease to reduce the refrigerant flow of the indoor unit, thereby increasing the refrigerant flow of other indoor units and improving the cooling effect of other rooms. If the opening rate of the indoor units is low, the refrigerant distribution is generally sufficient. At this time, there is no need for special control of the indoor unit with a large model.

[0073] The pseudo-demand control method may include: controlling the indoor unit with high pseudo-demand to reduce the wind speed and the expansion valve opening. Specifically, the indoor unit with high pseudo-demand may be controlled to reduce the wind speed by one level and the expansion valve opening to half of the current opening.

[0074] It should be noted that controlling the expansion valve of the indoor unit with high pseudo-demand to reduce the opening degree can reduce the refrigerant flow of the corresponding indoor unit to increase the amount of refrigerant allocated to other indoor units and improve the cooling effect of other rooms; at the same time, the indoor unit with high pseudo-demand can be controlled to lower the wind speed to reduce the air circulation rate in the corresponding area, ensure the air outlet temperature of the indoor unit with high pseudo-demand, and reduce cooling waste.

[0075] The preset deviation threshold can be set to a value range of 6-10°C. When the indoor unit simultaneous opening ratio is greater than or equal to 70%, the preset deviation threshold is preferably 6°C; when the indoor unit simultaneous opening ratio is less than 70%, the preset deviation threshold is preferably 8°C. The proportional adjustment value can be set to a value range of 3-5. When the indoor unit simultaneous opening ratio is greater than or equal to 70%, the proportional adjustment value is preferably 5; when the indoor unit simultaneous opening ratio is less than 70%, the proportional adjustment value is preferably 4. The temperature adjustment value can be set to a value range of 5-8°C, preferably 5°C. This achieves a better control effect.

[0076] During the refrigeration operation of the multi-split system, if one of the indoor units in refrigeration operation stops or one of the indoor units that is stopped starts refrigeration operation, the above steps of obtaining the number of indoor units in refrigeration and the total number of indoor units are re-executed to timely update the simultaneous opening rate of the indoor units and adjust the corresponding control method to obtain a better refrigeration effect.

[0077] It is preferred that the temperature deviation, the average temperature deviation and the actual average temperature of each refrigeration unit be calculated 30 minutes after the unit is turned on.

[0078] Figure 2 A schematic flow chart of a control method for optimizing the refrigeration effect of a multi-unit refrigeration system provided in an embodiment of the present invention, the method comprising:

[0079] S201, 30 minutes after the power-on, obtain the number of indoor units N and outdoor temperature T determined by the cooling system in real time wai 、Set temperature TD of each indoor unit in cooling operation i The actual temperature TS of the room where the refrigeration unit is located i ;

[0080] S202, calculating the indoor unit simultaneous operation ratio N / M, where N is the number of indoor units in cooling operation and M is the total number of indoor units in the multi-split system;

[0081] S203, calculate the temperature deviation of each refrigeration unit: dT i =TS i -TD i ;

[0082] S204, calculate the average temperature deviation of all refrigeration units: dT = (dT1 + dT2 + ... dT N ) / N;

[0083] S205, calculate the average actual temperature of all rooms where the refrigeration units are located: TS = (TS1 + TS2 + ... TS N ) / N;

[0084] S206, if there is a refrigeration unit that satisfies dT i ≥A℃ or dT i ≤dT / B, then the refrigeration indoor unit is determined to be a unit with high pseudo-demand or a large-sized indoor unit;

[0085] S207, if the actual temperature of the room where the refrigeration unit is located meets TS i ≥TS+C℃, the refrigeration indoor unit is determined to be a unit with high pseudo-demand;

[0086] S208, adjust the fan gear F of the indoor unit with high pseudo demand i =F i -1, F i ≥F min , expansion valve opening P i =P i / 2、P i ≥P min Among them, F min For the lowest gear, P min is the minimum opening;

[0087] S209, if the actual temperature of the room where the refrigeration unit is located meets TS i <TS, then the refrigeration indoor unit is determined to be the large indoor unit;

[0088] S210, when the indoor unit opening ratio N / M>70%, adjust the fan gear F of the large indoor unit. i =F i +1, F i ≤F max , expansion valve opening P i =P i / 2、P i ≥P min .

[0089] Figure 3 A control device for optimizing the refrigeration effect of a multi-unit refrigeration system provided in an embodiment of the present invention includes:

[0090] The acquisition module 301 is used to obtain the outdoor temperature, the set temperature of each refrigeration unit and the actual temperature of the room in which it is located;

[0091] The calculation module 302 is configured to calculate the difference between the actual temperature of the room where each refrigeration unit is located and the set temperature when the outdoor temperature is greater than or equal to a preset temperature threshold, thereby obtaining a temperature deviation of each refrigeration unit; and to calculate the average of the temperature deviations of all refrigeration units to obtain an average temperature deviation.

[0092] The prejudgment module 303 is configured to determine whether there is a refrigeration unit that meets the prejudgment conditions, where the prejudgment conditions include the temperature deviation of the refrigeration unit being greater than or equal to a preset deviation threshold, or the temperature deviation of the refrigeration unit being less than or equal to the quotient of the average temperature deviation and the proportional adjustment value; and to determine whether the refrigeration unit that meets the prejudgment conditions meets the pseudo-demand determination conditions or the selection large determination conditions.

[0093] A determination module 304 is configured to determine a refrigeration unit that meets a pseudo-demand determination condition as a unit with a high pseudo-demand, and to determine a refrigeration unit that meets a large selection determination condition as a large selection unit;

[0094] The control module 305 is used to control the indoor units with high pseudo-demand according to the pseudo-demand control method, and to control the indoor units with large selection according to the large selection control method.

[0095] The control device for optimizing the refrigeration effect of the multi-split unit provided in this embodiment can implement the above-mentioned control method. When the outdoor temperature is high, it can identify special indoor units with high pseudo-demand and large selection, and perform corresponding special control on them, thereby optimizing the refrigeration effect of each refrigeration indoor unit. Moreover, it can be achieved by using existing air-conditioning products without the need for additional components, which can save costs.

[0096] The calculation module 302 is further configured to calculate an average value of the actual temperatures of the rooms where all the refrigeration units are located, to obtain an average actual temperature value.

[0097] The acquisition module 301 is further configured to obtain the number of indoor refrigeration units and the total number of indoor units. The calculation module 302 is further configured to calculate the ratio of the number of indoor refrigeration units to the total number of indoor units to obtain the indoor unit co-operation rate. The control module 305 is further configured to control the larger indoor unit to increase its air speed and decrease its expansion valve opening when the indoor unit co-operation rate is greater than or equal to a preset co-operation rate threshold.

[0098] This embodiment also provides an air conditioner, which includes a computer-readable storage medium storing a computer program and a processor. When the computer program is read and executed by the processor, the above-mentioned control method for optimizing the refrigeration effect of the multi-split unit is implemented.

[0099] This embodiment further provides a computer-readable storage medium having a computer program stored thereon. When executed by a processor, the computer program implements the various processes of the aforementioned control method embodiment for optimizing the refrigeration effect of a multi-unit cooling system, achieving the same technical effects. To avoid repetition, the details are omitted here. The computer-readable storage medium may be, for example, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0100] Of course, those skilled in the art will understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the control device through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it may include the processes of the above-mentioned method embodiments, wherein the storage medium may be a memory, a disk, an optical disk, etc.

[0101] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

[0102] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0103] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A control method for optimizing the refrigeration effect of a multi-unit machine, characterized in that: include: Get the outdoor temperature, the set temperature of each refrigeration unit and the actual temperature of the room where it is located; If the outdoor temperature is greater than or equal to a preset temperature threshold, the difference between the actual temperature of the room where each refrigeration unit is located and the set temperature is calculated to obtain the temperature deviation of each refrigeration unit; the average value of the temperature deviations of all the refrigeration units is calculated to obtain the average temperature deviation value; Determining whether there is a refrigeration unit that meets a pre-determination condition, wherein the pre-determination condition includes that the temperature deviation of the refrigeration unit is greater than or equal to a preset deviation threshold, or that the temperature deviation of the refrigeration unit is less than or equal to the quotient of the temperature deviation average value and the proportional adjustment value; If so, it is determined that there is an indoor unit with high pseudo-demand or an indoor unit with a large selection, and it is determined whether the refrigeration indoor unit that meets the pre-judgment condition meets the pseudo-demand determination condition or the large selection determination condition; If the refrigeration indoor unit meets the pseudo-demand determination condition, the refrigeration indoor unit that meets the pseudo-demand determination condition is determined as the indoor unit with high pseudo-demand, and the indoor unit with high pseudo-demand is controlled according to the pseudo-demand control method; If the refrigeration indoor unit meets the large selection determination condition, the refrigeration indoor unit that meets the large selection determination condition is determined as a large selection indoor unit, and the large selection indoor unit is controlled according to the large selection control method; The method further includes: calculating an average value of actual temperatures of the rooms where all the refrigeration units are located to obtain an average actual temperature value; The pseudo-demand determination condition includes: the actual temperature of the room where the refrigeration unit is located is greater than or equal to the sum of the actual temperature average value and the temperature adjustment value; the selection large determination condition includes: the actual temperature of the room where the refrigeration unit is located is less than the actual temperature average value.

2. The control method for optimizing the refrigeration effect of a multi-unit refrigeration unit according to claim 1, characterized in that: The large-scale control method for selection includes: Obtaining the number of refrigeration indoor units and the total number of indoor units; Calculating the ratio of the number of the refrigeration indoor units to the total number of the indoor units to obtain the indoor unit simultaneous start-up rate; If the co-opening rate of the indoor units is greater than or equal to a preset co-opening rate threshold, the wind speed of the indoor unit with the larger selected type is controlled to increase and the opening of the expansion valve is controlled to decrease.

3. The control method for optimizing the refrigeration effect of a multi-unit refrigeration unit according to claim 2, characterized in that: The controlling the wind speed of the indoor unit with a larger model to increase and the opening of the expansion valve to decrease includes: controlling the wind speed of the indoor unit with a larger model to increase by one level and decreasing the opening of the expansion valve to half of the current opening.

4. The control method for optimizing the refrigeration effect of a multi-unit refrigeration unit according to claim 1, characterized in that: The pseudo-demand control method includes: controlling the wind speed of the indoor unit with high pseudo-demand to decrease and reducing the opening of the expansion valve.

5. The control method for optimizing the refrigeration effect of a multi-unit refrigeration unit according to claim 4, characterized in that: The controlling the indoor unit wind speed with high pseudo demand to decrease and the expansion valve opening to reduce includes: controlling the indoor unit wind speed with high pseudo demand to decrease by one level and reducing the expansion valve opening to half of the current opening.

6. The control method for optimizing the refrigeration effect of a multi-unit refrigeration unit according to claim 1, characterized in that: The preset temperature threshold value ranges from 35 to 40°C; And / or, the preset deviation threshold value is in the range of 6 to 10°C; And / or, the ratio adjustment value ranges from 3 to 5.

7. The control method for optimizing the refrigeration effect of a multi-unit refrigeration unit according to claim 1, characterized in that: The temperature adjustment value ranges from 5 to 8°C.

8. The control method for optimizing the refrigeration effect of a multi-unit refrigeration unit according to claim 2, characterized in that: The value range of the indoor unit simultaneous opening rate is 60-80%.

9. A control device for optimizing the refrigeration effect of a multi-unit cooling system, characterized in that: include: The acquisition module is used to obtain the outdoor temperature, the set temperature of each refrigeration unit and the actual temperature of the room in which it is located; a calculation module, configured to calculate, under the condition that the outdoor temperature is greater than or equal to a preset temperature threshold, the difference between the actual temperature of the room where each of the refrigeration units is located and the set temperature, to obtain a temperature deviation of each of the refrigeration units; calculate an average of the temperature deviations of all the refrigeration units to obtain an average temperature deviation; and calculate an average of the actual temperatures of the rooms where all the refrigeration units are located to obtain an average actual temperature; A prejudgment module is configured to determine whether there is a refrigeration unit that meets a prejudgment condition, wherein the prejudgment condition includes that the temperature deviation of the refrigeration unit is greater than or equal to a preset deviation threshold, or that the temperature deviation of the refrigeration unit is less than or equal to the quotient of the temperature deviation average value and the proportional adjustment value; and to determine whether the refrigeration unit that meets the prejudgment condition meets a pseudo-demand determination condition or a large selection determination condition; wherein the pseudo-demand determination condition includes that the actual temperature of the room where the refrigeration unit is located is greater than or equal to the sum of the actual temperature average value and the temperature adjustment value; and the large selection determination condition includes that the actual temperature of the room where the refrigeration unit is located is less than the actual temperature average value; a determination module, configured to determine the refrigeration indoor unit that meets the pseudo-demand determination condition as an indoor unit with high pseudo-demand, and to determine the refrigeration indoor unit that meets the large selection determination condition as an indoor unit with large selection; The control module is used to control the indoor unit with high pseudo-demand according to the pseudo-demand control method, and is used to control the indoor unit with large selection according to the large selection control method.

10. An air conditioner, characterized in that: The invention comprises a computer-readable storage medium storing a computer program and a processor, wherein when the computer program is read and executed by the processor, the method according to any one of claims 1 to 8 is implemented.

11. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is read and executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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