Multi-split air conditioning system capacity ratio judgment method, controller and multi-split air conditioning system

Abstract

The invention discloses a capacity ratio judgment method of a multi-split air conditioning system, a controller and the multi-split air conditioning system. Values of set identifiers of indoor units are used for determining whether nominal energy demand values of the indoor units are included in calculation or not in the capacity ratio judgment process, and an outdoor unit obtains the nominal energy demand values of the indoor units by obtaining the values of the set identifiers of the indoor units; the nominal total energy demand calculation is carried out by combining the nominal energy demand value of each indoor unit, so that the nominal energy demand values of part of the indoor units can be excluded in the calculation process of the nominal total energy demand, and the outdoor unit can be matched with more indoor units; therefore, according to the embodiment of the invention, the indoor units which are relatively low in use frequency and have relatively small influence on the energy requirement of the multi-split system can be eliminated, and on the premise that the comfort is not reduced, the expansibility of the multi-split system is improved, the capacity matching of the indoor units and the outdoor units is optimized, and the flexibility of the multi-split system is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioner application technology, and in particular to a method for determining the capacity ratio of a multi-split system, a controller, and a multi-split system. Background Technology

[0002] In a multi-split air conditioning system, the total energy demand of the indoor units is usually calculated by the outdoor unit. After obtaining the number of online indoor units and the nominal energy demand of each online indoor unit, the outdoor unit calculates the total nominal energy demand of the indoor units, thereby confirming whether the current outdoor unit capacity selection is reasonable, and then controlling the compressor operating frequency.

[0003] In actual use, among the multiple indoor units online, there is one with a lower usage frequency. This indoor unit operates for a shorter time, and it is rare for all the other indoor units to be turned on at the same time. Therefore, this indoor unit has a lower impact on the cooling and heating performance of the multi-split system. If the energy demand of this indoor unit is always included in the outdoor unit's assessment of whether it exceeds the capacity allocation limit, it will result in a waste of outdoor unit capacity. Summary of the Invention

[0004] This application provides a method for determining the capacity ratio of a multi-split air conditioning system, a controller, and a multi-split air conditioning system, which can optimize the capacity ratio between the outdoor and indoor units of the multi-split air conditioning system.

[0005] In a first aspect, embodiments of this application provide a capacity matching method for a multi-split air conditioning system, applied to the outdoor unit of the multi-split air conditioning system, wherein the outdoor unit is connected to multiple indoor units; the capacity matching method includes:

[0006] Determine the nominal energy requirement value and the value of the setting indicator for each indoor unit. The value of the setting indicator indicates whether the nominal energy requirement value of the corresponding indoor unit is included in the capacity allocation judgment process.

[0007] The first nominal total energy requirement used for over-sizing judgment is determined based on the nominal energy requirement of each indoor unit and the value of the set identifier;

[0008] Whether the multi-split air conditioning system is over-configured is determined based on the first nominal total energy requirement and the upper limit of the capacity ratio of the outdoor unit.

[0009] In some embodiments, the method further includes:

[0010] The second nominal total energy requirement used for mismatch judgment is determined based on the nominal energy requirement of each indoor unit;

[0011] Whether the multi-split air conditioning system is under-equipped is determined based on the second nominal total energy requirement and the lower limit of the capacity ratio of the outdoor unit.

[0012] In some embodiments, when the value of the set identifier is equal to the first value, it indicates that the nominal energy requirement value of the corresponding indoor unit is not included in the over-specification judgment process and is included in the under-specification judgment process;

[0013] When the value of the set identifier is equal to the second value, the nominal energy requirement value of the corresponding indoor unit is included in the over-specification judgment process and the under-specification judgment process.

[0014] In some embodiments, determining the first nominal total energy requirement used for over-sizing judgment based on the nominal energy requirement value of each of the indoor units and the value of the set identifier includes:

[0015] Determine each target indoor unit whose value of the set identifier is equal to the second value;

[0016] The nominal energy requirements of each of the target indoor units are added together to obtain the first nominal total energy requirement;

[0017] The step of determining the second nominal total energy requirement used for the shortage judgment based on the nominal energy requirement of each indoor unit includes:

[0018] The nominal energy demand of each indoor unit whose set identifier value is equal to the first value and the second value is added together to obtain the second nominal total energy demand.

[0019] In some embodiments, determining the nominal energy requirement value and the value of the setting identifier for each of the indoor units includes:

[0020] Obtain the nominal energy requirement of the indoor unit, or obtain the model number of the indoor unit to determine the nominal energy requirement value based on the model number;

[0021] The status command sent by the indoor unit is received. The status command is generated by the indoor unit according to the value of a specified field set by the local setting parameter. The local setting parameter represents the calculation method of the nominal energy requirement of the indoor unit in the process of the outdoor unit performing capacity matching judgment.

[0022] The value of the setting identifier of the indoor unit is determined based on the value of the specified field.

[0023] In some embodiments, the local setting parameter is determined based on at least one of the values ​​of the DIP switches of the indoor unit, specific values ​​of the preset parameter table stored in the indoor unit, and setting values ​​of the wired controller of the indoor unit.

[0024] Secondly, embodiments of this application provide a capacity matching method for a multi-split air conditioning system, applied to the indoor unit of the multi-split air conditioning system, wherein the indoor unit is connected to the outdoor unit; the capacity matching method includes:

[0025] The local setting parameters are detected, which represent the calculation method of the nominal energy requirement of the indoor unit in the process of determining the capacity ratio of the outdoor unit;

[0026] According to the specified field in the local setting parameter setting status instruction, the status instruction is sent to the outdoor unit so that the outdoor unit determines the value of the setting identifier of the indoor unit according to the value of the specified field. The value of the setting identifier indicates whether the nominal energy requirement value of the corresponding indoor unit is included in the capacity matching judgment process.

[0027] In some embodiments, the detection of locally set parameters includes:

[0028] According to the priority order of the DIP switch value of the indoor unit, the specific value in the preset parameter table stored in the indoor unit, and the setting value of the wired controller of the indoor unit, the value detected first is used as the local setting parameter.

[0029] In some embodiments, using the first detected value as a locally set parameter includes:

[0030] If a DIP switch value is detected, the DIP switch value is used as the local setting parameter;

[0031] If the DIP switch is not present or the DIP switch is not set with a DIP value, the specific value in the preset parameter table shall be used as the local setting parameter.

[0032] If the preset parameter table does not set the specific value, the setting value of the wired controller shall be used as the local setting parameter.

[0033] If the wired controller does not exist or the wired controller does not support setting the setting value, the preset default value is used as the local setting parameter.

[0034] Secondly, embodiments of this application provide a controller, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the capability matching determination method as described in the first aspect.

[0035] Thirdly, embodiments of this application provide a multi-unit system including a controller as described in the second aspect.

[0036] The capacity matching determination method, controller, and multi-split air conditioning system of this application embodiment have at least the following beneficial effects: the setting identifier value of the indoor unit is used to determine whether the nominal energy requirement value of the indoor unit is included in the calculation during the capacity matching determination process. The outdoor unit obtains the setting identifier value of each indoor unit and combines it with the nominal energy requirement value of each indoor unit to calculate the nominal total energy requirement. In this way, the nominal energy requirement value of some indoor units can be excluded during the calculation of the nominal total energy requirement, so that the outdoor unit can be matched with more indoor units. Therefore, the embodiment of this application can exclude indoor units with low usage frequency and small impact on the energy requirement of the multi-split air conditioning system, improve the scalability of the multi-split air conditioning system without reducing comfort, optimize the capacity matching of indoor and outdoor units, and improve the flexibility of the multi-split air conditioning system.

[0037] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0038] Figure 1 This is a topology diagram of a multi-unit network provided in one embodiment of this application;

[0039] Figure 2 This is a flowchart of the over-provisioning judgment method of the capability matching judgment method provided in one embodiment of this application;

[0040] Figure 3 This is a flowchart of the capacity matching determination method provided in one embodiment of this application for determining the missing capacity;

[0041] Figure 4 This is a flowchart of calculating the first nominal total energy requirement provided in one embodiment of this application;

[0042] Figure 5 This is a flowchart of calculating the second nominal total energy requirement provided in one embodiment of this application;

[0043] Figure 6 This is a flowchart illustrating the determination of the value of a setting identifier according to one embodiment of this application;

[0044] Figure 7 This is a flowchart of a method for determining the capacity ratio on one side of the indoor unit according to an embodiment of this application;

[0045] Figure 8 This is a flowchart of detecting locally set parameters provided in one embodiment of this application;

[0046] Figure 9 This is a flowchart of detecting locally set parameters in priority order according to one embodiment of this application;

[0047] Figure 10 This is an overall flowchart of a capability matching determination method provided in an example of this application;

[0048] Figure 11 This is a schematic diagram of the control structure of a controller provided in one embodiment of this application. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various implementations. Simultaneously, the steps or actions described in the method description can be rearranged or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various orders in the specification and drawings are merely for the clear description of a particular embodiment and do not imply a mandatory order, unless otherwise stated that a particular order must be followed.

[0050] In the description of this application, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0051] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0052] Currently, in multi-split air conditioning systems, when setting up outdoor and indoor units, it is necessary to determine whether the capacity selection of the outdoor units matches the total nominal energy requirement of the indoor units. The calculation method usually needs to consider both under-capacity and over-capacity. When the sum of the nominal energy requirements of all online indoor units is less than k1 * the nominal energy requirement of the outdoor unit (k1<1), it is determined that the multi-split air conditioning system has an indoor unit under-capacity, that is, the outdoor unit capacity is excessive. When the sum of the nominal energy requirements of all online indoor units is greater than k2 * the nominal energy requirement of the outdoor unit (k2>1), it is determined that the multi-split air conditioning system has an indoor unit over-capacity, that is, the outdoor unit capacity is insufficient.

[0053] This application provides a method for determining the capacity allocation of a multi-split air conditioning system, a controller, and a multi-split air conditioning system. The value of the setting identifier of the indoor unit is used to determine whether the nominal energy requirement of the indoor unit should be included in the calculation during the capacity allocation determination process. The outdoor unit obtains the value of the setting identifier of each indoor unit and calculates the nominal total energy requirement by combining the nominal energy requirement of each indoor unit. In this way, the nominal energy requirement of some indoor units can be excluded during the calculation of the nominal total energy requirement, so that the outdoor unit can be matched with more indoor units. Therefore, this application can exclude indoor units with low usage frequency and little impact on the energy requirement of the multi-split air conditioning system, improve the scalability of the multi-split air conditioning system without reducing comfort, optimize the capacity matching of indoor and outdoor units, and improve the flexibility of the multi-split air conditioning system.

[0054] The following description, with reference to the accompanying drawings, explains the capacity allocation method for multi-split air conditioning systems, the controller, and the multi-split air conditioning system itself.

[0055] Reference Figure 1 As shown, Figure 1 This is a schematic diagram of a multi-split air conditioning system architecture where multiple indoor units are connected to one outdoor unit, as provided in an embodiment of this application. The capacity matching ratio of the multi-split system is determined by comparing the total nominal energy demand of the indoor units with the capacity of the outdoor unit. Typically, it is necessary to determine whether the total nominal energy demand of the indoor units is higher than the upper limit of the outdoor unit's capacity matching ratio (greater than the outdoor unit's nominal capacity value), and whether it is lower than the lower limit (less than the outdoor unit's nominal capacity value). Currently, in the capacity matching ratio determination process, it is impossible to select which indoor units to include in the calculation. Therefore, the outdoor unit is calculated based on the nominal energy demand of all online indoor units. This results in indoor units with low usage frequency being consistently included in the capacity matching assessment, leading to a waste of outdoor unit capacity in the multi-split system and a reduced user experience.

[0056] Based on this, refer to Figure 2 As shown, the capacity matching method provided in this application embodiment is applied to the outdoor unit of a multi-split air conditioning system. The capacity matching method includes, but is not limited to, the following steps:

[0057] Step S110: Determine the nominal energy requirement value and the value of the setting indicator for each indoor unit. The value of the setting indicator indicates whether the nominal energy requirement value of the corresponding indoor unit is included in the capacity matching judgment process.

[0058] Step S120: Determine the first nominal total energy requirement for over-sizing judgment based on the nominal energy requirement value of each indoor unit and the value of the setting indicator;

[0059] Step S130: Determine whether the multi-split system is over-configured based on the first nominal total energy requirement and the upper limit of the outdoor unit's capacity ratio.

[0060] When the outdoor unit performs capacity matching, it determines the nominal energy requirement of each online indoor unit and also sets the value of a setting indicator for each indoor unit. The setting indicator value determines whether the nominal energy requirement of that indoor unit is included in the capacity matching calculation. For example, if the setting indicator value indicates that the nominal energy requirement of indoor unit A is not included in the capacity matching calculation, then the outdoor unit will not consider the nominal energy requirement of indoor unit A when calculating the total nominal energy requirement of the indoor units. This reduces the calculated total nominal energy requirement of the indoor units. Therefore, when comparing the total nominal energy requirement of the indoor units with the upper limit of the outdoor unit's capacity matching, it is less likely to exceed the upper limit. This is equivalent to the outdoor unit being able to connect more indoor units or selecting outdoor units with smaller nominal capacity values, avoiding the problem of wasting outdoor unit capacity in multi-split systems by consistently including infrequently used indoor units in the calculation.

[0061] Understandably, although the above Figure 1 Only one outdoor unit is shown. In actual applications, multiple outdoor units can be connected to form the outdoor equipment of a multi-split system. In this case, the upper limit of the capacity ratio is determined based on the sum of the nominal capacities of each outdoor unit, and the capacity ratio is judged based on this upper limit of the capacity ratio.

[0062] Reference Figure 3 As shown, in some embodiments, the above-mentioned capacity matching determination method further includes:

[0063] Step S210: Determine the second nominal total energy requirement used for the energy shortage judgment based on the nominal energy requirement of each indoor unit;

[0064] Step S220: Determine whether the multi-split system is under-equipped based on the second nominal total energy requirement and the lower limit of the outdoor unit capacity ratio.

[0065] As previously mentioned, capacity matching determination requires checking whether the capacity matching limit is exceeded or fallen below the capacity matching lower limit. Steps S110 to S130 calculate the nominal total energy requirement of the indoor units based on the value of the set indicator to determine whether the upper limit is exceeded. In this embodiment, steps S210 to S220 directly calculate the nominal total energy requirement of all indoor units to determine whether the lower limit is exceeded. This calculation ensures that the nominal energy requirement of all indoor units is taken into account, making it easier to meet the lower limit of the outdoor unit's capacity matching.

[0066] The value of the setting identifier is determined by the local parameters of the indoor unit. Depending on the actual usage, different internal parameters of the indoor unit can be used as references. These local parameters can also be set by external users, thus enabling the indoor unit to determine the corresponding setting identifier value. Specifically, in some embodiments, when the value of the setting identifier is equal to a first value, it indicates that the nominal energy requirement of the corresponding indoor unit is not included in the over-sizing judgment process and is included in the under-sizing judgment process; when the value of the setting identifier is equal to a second value, it indicates that the nominal energy requirement of the corresponding indoor unit is included in both the over-sizing judgment process and the under-sizing judgment process.

[0067] The first and second values ​​can be 1 and 0, respectively, to facilitate the judgment by the multi-split system's program. When the setting of air conditioner A is the first value, during the capacity matching judgment process, if it is judging whether the upper limit of the outdoor unit's capacity matching ratio has been reached, the nominal energy requirement of indoor unit A will not be included in the calculation range; if it is judging whether it is judging whether the lower limit of the outdoor unit's capacity matching ratio has been reached, the nominal energy requirement of indoor unit A will be included in the calculation range. When the setting of air conditioner A is the second value, during the capacity matching judgment process, regardless of whether it is judging whether the upper limit or lower limit of the outdoor unit's capacity matching ratio has been reached, the nominal energy requirement of air conditioner A will be included in the calculation range.

[0068] Therefore, referring to Figure 4 As shown, in step S120 above, determining the first nominal total energy requirement used for over-sizing judgment based on the nominal energy requirement value of each indoor unit and the value of the setting indicator includes:

[0069] Step S310: Determine each target indoor unit whose set identifier value is equal to the second value;

[0070] Step S320: Add the nominal energy requirements of each target indoor unit to obtain the first nominal total energy requirement;

[0071] When determining whether the outdoor unit capacity ratio limit has been reached, indoor units with a set value equal to the first value are not included in the calculation. Therefore, only indoor units with a set value equal to the second value are considered and identified as target indoor units that need to be included in the calculation. At this time, the nominal energy demand values ​​of all target indoor units are added together to obtain the first nominal total energy demand.

[0072] If the first nominal total energy requirement is greater than the upper limit of the capacity ratio, the multi-split system is considered to be over-supplied; if the first nominal total energy requirement is less than or equal to the upper limit of the capacity ratio, the multi-split system is considered not to be over-supplied.

[0073] Similarly, refer to Figure 5 As shown, step S210 above, which determines the second nominal total energy requirement used for the energy shortage judgment based on the nominal energy requirement value of each indoor unit, includes:

[0074] Step S410: Add the nominal energy demand values ​​of each indoor unit whose set identifier value is equal to the first value and the second value to obtain the second nominal total energy demand.

[0075] When determining whether the outdoor unit's capacity ratio has reached the lower limit, regardless of whether the set value is equal to the first value or the second value, the indoor unit needs to be included in the calculation. Therefore, the nominal energy demand values ​​of all indoor units are added together to obtain the second nominal total energy demand.

[0076] If the second nominal total energy requirement is less than the lower limit of the capacity ratio, the multi-split system is considered to have a shortage of capacity. If the second nominal total energy requirement is greater than or equal to the lower limit of the capacity ratio, the multi-split system is considered not to have a shortage of capacity.

[0077] Reference Figure 7 As shown, in some embodiments, the value of the set identifier is determined in the following way:

[0078] Step S510: Obtain the nominal energy requirement of the indoor unit, or obtain the model of the indoor unit to determine the nominal energy requirement value based on the model.

[0079] Step S520: Receive a status command sent by the indoor unit. The status command is generated by the indoor unit by setting the value of a specified field according to the local setting parameters. The local setting parameters represent the calculation method of the indoor unit's nominal energy requirement value in the outdoor unit's capacity matching judgment process.

[0080] Step S530: Determine the value of the setting identifier of the indoor unit based on the value of the specified field.

[0081] The indoor unit generates a status command and sets the values ​​of specified fields in the status command according to local settings. The outdoor unit, upon receiving the status command, parses it, determines the values ​​of the specified fields, and then determines the value of the setting identifier of the indoor unit that sent the status command. Specifically, if the specified field can take the value 0 or 1, its value can be directly used as the setting identifier value. If the specified field has multiple possible values, its value is converted into the setting identifier value using a preset conversion method.

[0082] In some embodiments, the local setting parameters are determined based on at least one of the values ​​of the indoor unit's DIP switches, specific values ​​from a preset parameter table stored in the indoor unit, and setting values ​​from the indoor unit's wired controller.

[0083] If the indoor unit has a DIP switch, the specified field can be set according to the DIP switch value. If the indoor unit stores a preset parameter table, the specified field can be set according to the specific value in the preset parameter table. If the indoor unit is connected to a wired controller that supports setting whether the indoor unit is included in the capacity matching process, the specified field can be set according to the wired controller's setting value. It is understandable that the DIP switch value, the specific value in the preset parameter table, and the wired controller's setting value may set the specified field according to different standards. For example, the DIP switch value might use 1 or 2 to represent a specified field being set to 0 or 1, and the specific value in the preset parameter table might use 0 or 1 to represent a specified field being set to 0 or 1, and so on. In some possible cases, a DIP switch value of 1 might represent a specified field being set to 0, indicating that indoor unit A is not included in the capacity matching process, while a specific value in the preset parameter table might represent a specified field being set to 0, indicating that indoor unit B is included in the capacity matching process. In this case, the specified field needs to carry information indicating which method of setting is used, providing the outdoor unit with a reference value for converting to the set identifier.

[0084] Reference Figure 8 As shown in the embodiment of this application, another capacity matching method is applied to the indoor unit of a multi-split air conditioning system. The capacity matching method includes, but is not limited to, the following steps:

[0085] Step S610: Detect local setting parameters. Local setting parameters represent the calculation method of the indoor unit's nominal energy requirement during the outdoor unit's capacity matching judgment process.

[0086] Step S620: Set the specified field in the local setting parameter status command and send the status command to the outdoor unit so that the outdoor unit can determine the value of the setting identifier of the indoor unit according to the value of the specified field. The value of the setting identifier indicates whether the nominal energy requirement value of the corresponding indoor unit is included in the capacity matching judgment process.

[0087] After powering on or during use, the indoor unit detects local setting parameters and generates a status command. This status command sets the value of a specified field based on the local setting parameters and then sends the status command to the outdoor unit. Upon receiving the status command, the outdoor unit parses it, determines the value of the specified field, and thus determines the value of the setting identifier of the indoor unit that sent the status command. Specifically, if the specified field can take the value 0 or 1, its value can be directly used as the setting identifier value. If the specified field has multiple possible values, a preset conversion method is used to convert the specified field value into the setting identifier value.

[0088] In some embodiments, detecting the local setting parameter in step S610 above includes:

[0089] Step S710: According to the priority order of the DIP switch value of the indoor unit, the specific value in the preset parameter table stored in the indoor unit, and the setting value of the indoor unit's wired controller, the value detected first is used as the local setting parameter.

[0090] As previously mentioned, the indoor unit can determine its local settings parameters based on the DIP switches, preset parameter tables, and the wired controller's settings. Therefore, the indoor unit effectively provides a user-selectable first choice; users can customize whether the indoor unit is included in the outdoor unit's over-sizing process using the DIP switches, preset parameter tables, and wired controller. These components have a certain priority; the indoor unit checks each component in descending order of priority to determine if it has a corresponding value, and then uses the first detected value as the local settings parameter.

[0091] Reference Figure 9 As shown, in some embodiments, step S710 above uses the first detected value as a local setting parameter, including:

[0092] Step S810: If a DIP switch value is detected, the DIP switch value is used as the local setting parameter.

[0093] Step S820: If there is no DIP switch or the DIP switch is not set with a DIP value, use a specific value in the preset parameter table as the local setting parameter.

[0094] Step S830: If the preset parameter table does not have a specific value set, the setting value of the wired controller shall be used as the local setting parameter.

[0095] In step S840, if there is no wired controller or the wired controller does not support setting the setting value, the default value is used as the local setting parameter.

[0096] In a multi-split air conditioning system, there may be indoor units with inconsistent specifications. Some indoor units may have DIP switches, while others may not have DIP switches but have stored preset parameter tables. Some indoor units may not have DIP switches or stored preset parameter tables and are set via a wired controller. Alternatively, some indoor units may have at least two of the following: DIP switches, preset parameter tables, and wired controllers. Therefore, the embodiments of this application define the priority of indoor unit judgment, with the priority from high to low as: DIP switches, preset parameter tables, and wired controllers. The indoor unit first checks if there is a DIP switch on its main board. If there is a DIP switch, it generates a status command according to the value of the DIP switch. If there is no DIP switch, the indoor unit checks the preset parameter table in the memory. For example, it generates a status command based on the value of a specific bit in the preset parameter table. If there is no DIP switch and no preset parameter table (or the preset parameter table does not have the relevant bit), it checks the corresponding setting value in the wired controller. If there is one, it generates a status command according to the setting value. If not, it generates a status command according to the default value. The default value is that the nominal energy requirement of the indoor unit is included in the capacity matching judgment process, that is, it is processed as a normal indoor unit.

[0097] The preset parameter table can be stored in the EEPROM chip on the motherboard. The setting value of the wired controller refers to the setting of "the status of the indoor unit in the process of judging whether the outdoor unit's capacity ratio is reasonable".

[0098] In some embodiments, the status instruction is a B0 instruction, specifying a field as byte40 bit6.

[0099] In summary, the setting value of the indoor unit is used to determine whether the nominal energy requirement of the indoor unit should be included in the calculation during the capacity matching process. The outdoor unit obtains the setting value of each indoor unit and combines it with the nominal energy requirement of each indoor unit to calculate the nominal total energy requirement. In this way, the nominal energy requirement of some indoor units can be excluded during the calculation of the nominal total energy requirement, so that the outdoor unit can be matched with more indoor units. Therefore, the embodiments of this application can exclude indoor units with low usage frequency and small impact on the energy requirement of the multi-split system, improve the scalability of the multi-split system without reducing comfort, optimize the capacity matching of indoor and outdoor units, and improve the flexibility of the multi-split system.

[0100] The following example will be used to explain in detail the capability matching method of this application.

[0101] Reference Figure 1 As shown, the current user's multi-split system is a one-to-three system, with the outdoor unit connected to indoor units A, B, and C; the capacity matching method is as follows. Figure 10 As shown:

[0102] Step 1. The indoor unit determines its own status during the process of the outdoor unit determining whether the capacity ratio is reasonable.

[0103] The indoor unit adjusts its settings through three methods: DIP switches, preset parameter tables, and wired controller settings, with the priority decreasing in that order. First, the indoor unit checks if a DIP switch exists on its mainboard. If present, its value is used as the criterion. If no DIP switch exists, the indoor unit checks the parameters in the preset parameter table read from the EEPROM chip, using a specific bit within that parameter table as the criterion. If neither a DIP switch nor a corresponding bit exists in the preset parameter table, the user can use a wired controller that supports setting the indoor unit's status during the outdoor unit's capacity matching process to determine whether the indoor unit is affected by exceeding limits. After checking the values ​​set by these three methods, the indoor unit sends its status settings to the outdoor unit via the outdoor unit protocol B0 instruction byte40bit6.

[0104] For example, indoor units A, B, and C are models with capacities of 45GW, 45GW, and 71GW respectively (nominal power 45GW and 71GW). The DIP switch for capacity matching judgment of indoor unit A is set to 1 (the switch value has three possible values: 0, 1, and 2). Indoor unit B has no DIP switch, but the bit value for capacity matching judgment in the preset parameter table is 1. Indoor unit C has no DIP switch and no related bit in the preset parameter table; its capacity matching judgment setting in the wired controller's engineering mode is 0. According to the aforementioned design logic, when the outdoor unit judges whether the capacity matching is exceeded, indoor units A and C determine that they are included in the capacity matching exceedance calculation range, while indoor unit B determines that it is not included in the capacity matching exceedance calculation range. After completing the above judgment process, indoor units A and C set byte 40 bit 6 of the sent B0 command to 0, and indoor unit B sets byte 40 bit 6 of the sent B0 command to 1.

[0105] Step 2. The outdoor unit calculates whether the capacity allocation of the multi-split system is reasonable based on the instructions sent by the indoor unit.

[0106] When the outdoor unit receives the B0 command from the indoor unit, it determines whether the capacity ratio between the indoor and outdoor units is reasonable based on the bits in the B0 command. If byte 40 bit 6 of the B0 command sent by the indoor unit is 0, the indoor unit is considered to be included in the calculation range when determining whether the lower or upper limit of the capacity ratio has been reached. If byte 40 bit 6 of the B0 command sent by the indoor unit is 1, the indoor unit is included in the calculation range when determining whether the lower limit of the capacity ratio has been reached; however, it is not included in the calculation range when determining whether the upper limit of the capacity ratio has been exceeded.

[0107] After completing the judgment in step 1, the indoor unit sends the corresponding B0 command to the outdoor unit. The outdoor unit model is 140. Assuming the indoor unit's nominal total energy is less than 70, it's considered that the indoor unit's capacity has not reached the lower limit of the outdoor unit's capacity ratio; if it's greater than 150, it's considered that the indoor unit's capacity exceeds the upper limit of the outdoor unit's capacity ratio. According to the aforementioned logic, since byte 40 bit 6 of the B0 command sent by indoor units A and C is 0, and byte 40 bit 6 of the B0 command sent by indoor unit B is 1, when the outdoor unit judges whether the indoor unit is under-capacitated (nominal total energy of the indoor unit must be less than 70), the nominal total energy of the indoor unit must be 45 + 45 + 71 = 151 > 70, indicating no under-capacity. When the outdoor unit judges whether it is over-capacitated (nominal total energy of the indoor unit must be greater than 150), the nominal total energy of the indoor unit must be 45 + 71 = 116 < 150, indicating no over-capacity. If the previous calculation method is used, when determining whether the indoor unit is over-supplied, the nominal energy requirement of all indoor units is calculated. Then the nominal total energy requirement of the indoor units is 45 + 45 + 71 = 151 > 150, and the outdoor unit will be judged as over-supplied.

[0108] like Figure 11 As shown, Figure 11 This is a schematic diagram of a controller 1000 provided in one embodiment of this application.

[0109] The controller 1000 in this embodiment includes one or more processors 1001 and a memory 1002. Figure 11 The example uses a processor 1001 and a memory 1002.

[0110] Processor 1001 and memory 1002 can be connected via a bus or other means. Figure 11 Taking the example of a connection between China and Israel via a bus.

[0111] Memory 1002, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory 1002 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 1002 may optionally include memory 1002 remotely located relative to processor 1001, and these remote memories can be connected to controller 1000 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0112] Those skilled in the art will understand that Figure 11 The device structure shown does not constitute a limitation on the controller 1000 and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0113] One embodiment of this application also provides a multi-unit system, including the controller 1000 described above.

[0114] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network nodes. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0115] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0116] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0117] In the several embodiments provided in this application, it should be understood that the disclosed systems, instruments, and methods can be implemented in other ways. For example, the instrument embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between instruments or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0118] It should also be understood that the various implementation methods provided in this application can be combined arbitrarily to achieve different technical effects.

[0119] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A method for judging a capacity ratio of a multi-split system, characterized in that, An outdoor unit applied to the multi-connected system, the outdoor unit being connected to multiple indoor units; The capacity matching judgment method comprises: determining a nominal energy requirement value of each indoor unit and a set identification value, the set identification value representing whether the nominal energy requirement value of the corresponding indoor unit is included in the capacity matching judgment process; determining a first nominal total energy requirement used for over-capacity judgment according to the nominal energy requirement value of each indoor unit and the set identification value; determining whether the multi-connected system is over-capacity according to the first nominal total energy requirement and the upper limit of the capacity matching of the outdoor unit.

2. The method of claim 1, wherein, The method further comprises: determining a second nominal total energy requirement used for under-capacity judgment according to the nominal energy requirement value of each indoor unit; determining whether the multi-connected system is under-capacity according to the second nominal total energy requirement and the lower limit of the capacity matching of the outdoor unit.

3. The method of claim 2, wherein, When the set identification value is equal to a first numerical value, it represents that the nominal energy requirement value of the corresponding indoor unit is not included in the over-capacity judgment process and is included in the under-capacity judgment process; When the set identification value is equal to a second numerical value, it represents that the nominal energy requirement value of the corresponding indoor unit is included in both the over-capacity judgment process and the under-capacity judgment process.

4. The method of claim 3, wherein, The determination of the first nominal total energy requirement used for over-capacity judgment according to the nominal energy requirement value of each indoor unit and the set identification value comprises: determining each target indoor unit whose set identification value is equal to the second numerical value; adding the nominal energy requirement value of each target indoor unit to obtain the first nominal total energy requirement; The determination of the second nominal total energy requirement used for under-capacity judgment according to the nominal energy requirement value of each indoor unit comprises: adding the nominal energy requirement value of each indoor unit whose set identification value is equal to the first numerical value and equal to the second numerical value to obtain the second nominal total energy requirement.

5. The method of claim 1, wherein, The determination of the nominal energy requirement value of each indoor unit and the set identification value comprises: obtaining the nominal energy requirement of the indoor unit, or obtaining the model of the indoor unit to determine the nominal energy requirement value according to the model; receiving a state instruction sent by the indoor unit, the state instruction being generated by the indoor unit according to a local setting parameter, the local setting parameter representing the calculation method of the nominal energy requirement value of the indoor unit in the capacity matching judgment process of the outdoor unit; determining the set identification value of the indoor unit according to the value of the specified field.

6. The method of claim 5, wherein, The local setting parameter is determined according to at least one of the value of the dial switch of the indoor unit, the specific value of the preset parameter table stored by the indoor unit, and the setting value of the wire controller of the indoor unit.

7. A method for determining the capacity ratio of a multi-chiller system, characterized by, An indoor unit applied to the multi-connected system, the indoor unit being connected to an outdoor unit; The capacity matching judgment method comprises: detecting a local setting parameter, the local setting parameter representing the calculation method of the nominal energy requirement value of the indoor unit in the capacity matching judgment process of the outdoor unit; According to a specified field in the local setting parameter setting state instruction, and sending the state instruction to the outdoor unit, so that the outdoor unit determines the value of the setting identity of the indoor unit according to the value of the specified field, and the value of the setting identity represents whether the nominal capacity value of the corresponding indoor unit is included in the capacity matching judgment process.

8. The method of claim 7, wherein, The detecting local setting parameter comprises: According to the priority order of the dial value of the dial switch of the indoor unit, the specific value in the preset parameter table stored by the indoor unit and the setting value of the wire controller of the indoor unit, the first detected value is taken as the local setting parameter.

9. The method of claim 8, wherein, The taking the first detected value as the local setting parameter comprises: If the dial switch exists the dial value, taking the dial value as the local setting parameter; If the dial switch does not exist or the dial switch is not set with the dial value, taking the specific value in the preset parameter table as the local setting parameter; If the preset parameter table is not set with the specific value, taking the setting value of the wire controller as the local setting parameter; If the wire controller does not exist or the wire controller does not support setting the setting value, taking the preset default value as the local setting parameter.

10. A controller characterized by comprising: The memory is connected with the at least one processor in communication, and stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the capacity matching judgment method as any one of claims 1 to 9.

11. A multi-connected system comprising the controller of claim 10.

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