Control method, device and equipment of multi-connected heat pump unit, and storage medium

Abstract

The application belongs to the technical field of electrical appliances, and particularly relates to a control method, device, equipment and storage medium of a multi-connected heat pump unit. The application comprises the following steps: detecting a temperature difference between an actual temperature of a target medium at a current moment and a target temperature of the target medium, the target medium being a medium to be heated or cooled by the multi-connected heat pump unit; calculating an adjustment period according to the temperature difference and a preset period, determining a target heat pump that needs to be started or stopped in the multi-connected heat pump unit according to a preset loading rule, and controlling the corresponding target heat pump to perform a starting or stopping operation; repeating the above steps from the detection of the temperature difference after an interval of the adjustment period until the actual temperature of the target medium reaches the target temperature of the target medium. The application makes the adjustment period variable under the influence of the temperature difference, so that the multi-connected heat pump unit can timely adjust the target medium, such as water or air, to the target temperature after solving the simultaneous starting and stopping problem.

Description

Technical Field

[0001] This application belongs to the field of electrical technology, specifically relating to control methods, devices, equipment, and storage media for multi-unit heat pump units. Background Technology

[0002] When heat pumps are used in commercial settings, because the total load is relatively large, multiple heat pumps are usually installed in multi-unit configurations.

[0003] Typically, multi-split heat pump units operate by starting all heat pumps when heating or cooling is needed, and then shutting down once the target temperature is reached. However, this can lead to frequent start-stop cycles. For example, a large water tank might have 10 heat pumps set to a target temperature of 60 degrees Celsius. After all 10 pumps heat the water to 60 degrees Celsius, they all shut down, and the water temperature gradually drops to 56 degrees Celsius. Then, when heating is needed again, all 10 heat pumps are turned on, and after about 20 minutes, the water temperature reaches 60 degrees Celsius again before shutting down once more. This frequent start-stop cycle not only wastes energy but also accelerates the wear and tear on the heat pumps. Current technology addresses this problem by setting a fixed adjustment cycle. After each cycle, the temperature difference between the water and the target temperature is measured, and the number or sequence of heat pumps activated is determined based on this difference.

[0004] However, since the above method has a fixed adjustment cycle, although it solves the problem of frequent start-stop of multi-split heat pump units, it also leads to the problem that the heating / cooling speed of multi-split heat pump units is too slow and cannot adjust the target medium such as water or air to the target temperature in time. Summary of the Invention

[0005] This application provides a control method, device, equipment, and storage medium for multi-split heat pump units to solve the problem in the prior art where the adjustment cycle of multi-split heat pump units is fixed, resulting in slow heating / cooling speeds and the inability to adjust the target medium, such as water or air, to the target temperature in a timely manner.

[0006] In a first aspect, this application provides a control method for a multi-unit heat pump system, the method comprising:

[0007] The temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment is detected. The target medium is the medium that the multi-split heat pump unit needs to heat or cool.

[0008] The adjustment cycle is calculated based on the temperature difference and the preset cycle. The target heat pump that needs to be turned on or off in the multi-unit heat pump is determined according to the preset loading rules, and the corresponding target heat pump is controlled to perform the turn-on or turn-off operation.

[0009] After the adjustment period, the above steps are repeated starting from the detection of the temperature difference until the actual temperature of the target medium reaches the target temperature of the target medium.

[0010] In the preferred embodiment of the control method for a multi-unit heat pump unit described above, the step of calculating the adjustment cycle based on the temperature difference and the preset cycle includes:

[0011] The adjustment period is calculated according to the adjustment period calculation formula, which is as follows:

[0012]

[0013] in, The adjustment period is... For the preset period, The temperature difference, It is a preset parameter and is not equal to 0.

[0014] In the preferred embodiment of the control method for a multi-split heat pump unit described above, after controlling the multi-split heat pump unit to perform an on / off operation on the target heat pump, and before repeating the above steps after the adjustment cycle, the method further includes:

[0015] If the target heat pump is turned on, determine whether the duration of the adjustment cycle is less than a preset minimum duration:

[0016] If so, the preset minimum duration shall be used as the duration of the adjustment cycle.

[0017] In the preferred embodiment of the control method for a multi-split heat pump unit described above, the step of determining the target heat pump that needs to be turned on or off in the multi-split heat pump unit according to a preset loading rule includes:

[0018] The temperature change rate of the target medium is calculated using the following formula:

[0019]

[0020] in, The temperature change rate of the target medium. The actual temperature of the target medium at the current moment. The actual temperature of the target medium at the initial moment of the previous adjustment cycle prior to the current moment. The previous adjustment period prior to the current moment;

[0021] If, according to the preset loading rules, the temperature change rate of the target medium and the temperature difference satisfy the conditions for adding a working heat pump, then the target start-up heat pump is determined according to the rules for adding a working heat pump.

[0022] If, according to the preset loading rules, the temperature change rate of the target medium and the temperature difference satisfy the conditions for reducing the operating heat pump, then the target heat pump is determined to be shut down according to the rules for reducing the operating heat pump.

[0023] In the preferred embodiment of the control method for a multi-unit heat pump system described above, the step of determining the target start-up heat pump based on the rule for adding working heat pumps includes:

[0024] In the multi-unit heat pump system, the heat pump with the shortest cumulative operating time is identified as the target start-up heat pump.

[0025] In the preferred embodiment of the control method for a multi-unit heat pump system described above, the step of determining the target to shut down the heat pump based on the rule of reducing the number of operating heat pumps includes:

[0026] In the multi-unit heat pump system, the heat pump with the longest cumulative operating time is identified as the target shut-off heat pump.

[0027] In the preferred embodiment of the control method for a multi-split heat pump unit described above, before detecting the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment, the method further includes:

[0028] Control the power supply of the multi-unit heat pump unit;

[0029] In the multi-unit heat pump system, the heat pump with the shortest cumulative operating time is designated as the first heat pump.

[0030] The main heat pump of the multi-unit heat pump is controlled to send a start command to the first heat pump, so that the first heat pump runs for a preset time in response to the start command.

[0031] Secondly, this application provides a control device for a multi-split heat pump unit, the device comprising:

[0032] The temperature detection module is used to detect the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment, wherein the target medium is the medium to be heated or cooled by the multi-split heat pump unit.

[0033] The cycle calculation module is used to calculate the adjustment cycle based on the temperature difference and the preset cycle;

[0034] The heat pump control module is used to determine the target heat pump that needs to be turned on or off in the multi-unit heat pump according to the preset loading rules, and control the corresponding target heat pump to perform the turn-on or turn-off operation.

[0035] The main control module is used for:

[0036] The adjustment period calculated by the period calculation module is obtained, and after an interval of the adjustment period, the temperature detection module, the period calculation module, and the heat pump control module are controlled to perform their respective functions.

[0037] Repeat the above function until the actual temperature of the target medium reaches the target temperature of the target medium.

[0038] Thirdly, this application provides a control device for a multi-split heat pump unit, the device comprising: a temperature detection device, a memory, and a controller;

[0039] The temperature detection device is used to detect the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment. The target medium is the medium that the multi-split heat pump unit is to heat or cool.

[0040] The memory is used to store computer programs;

[0041] The controller is located at the main heat pump of the multi-unit heat pump unit and is used to execute the computer program stored in the memory to implement the first aspect and / or various possible implementations of the first aspect.

[0042] Fourthly, this application provides a readable storage medium on which a computer program is stored; the computer program is used to implement the first aspect and / or various possible implementations of the first aspect.

[0043] The control method, device, equipment, and storage medium for multi-split heat pump units provided in this application calculate the next adjustment cycle based on the actual temperature of the target medium, the temperature difference between the target and the target temperatures, and a preset cycle. This makes the adjustment cycle variable due to the temperature difference. Each time the adjustment cycle is repeated, the target heat pump that needs to be turned on or off in the multi-split heat pump unit is determined according to a preset loading rule, and the corresponding target heat pump is controlled to perform the on or off operation. Since the adjustment cycle is variable based on the temperature difference, the loading and unloading of the multi-split heat pump unit can respond promptly to changes in the actual temperature of the target medium and the temperature difference between the target and the target temperatures. This allows the multi-split heat pump unit to not only solve the problem of simultaneous start-up and shutdown, but also to promptly adjust the target medium, such as water or air, to the target temperature. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0045] Figure 1 This is a flowchart of a control method for a multi-unit heat pump unit provided in an embodiment of this application;

[0046] Figure 2 This is a flowchart of a method for determining the target heat pump that needs to be turned on or off in a multi-unit heat pump system according to a preset loading rule, provided in an embodiment of this application.

[0047] Figure 3 This is a schematic diagram of a control device for a multi-unit heat pump unit provided in an embodiment of this application;

[0048] Figure 4 This is a schematic diagram of the control equipment for a multi-unit heat pump unit provided in an embodiment of this application.

[0049] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0052] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0053] To address the issues of energy waste and accelerated wear and aging caused by frequent start-stop cycles in multi-split heat pump units, the existing solution is to set a fixed adjustment cycle. After each adjustment cycle, the temperature difference between the water temperature and the target temperature is measured, and the number or sequence of heat pumps to be turned on is determined based on the temperature difference.

[0054] However, since the above method has a fixed adjustment cycle, although it solves the problem of frequent start-stop of multi-split heat pump units, it also leads to the problem that the heating / cooling speed of multi-split heat pump units is too slow and cannot adjust the target medium such as water or air to the target temperature in time.

[0055] Therefore, to solve the problem that the fixed adjustment cycle of existing multi-split heat pump units leads to slow heating / cooling speeds and the inability to promptly adjust the target medium, such as water or air, to the target temperature, the technical concept of this application is: to calculate the next adjustment cycle based on the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment and the preset cycle; to determine the target heat pump that needs to be turned on or off according to the preset loading rules at each adjustment cycle, and to control the corresponding target heat pump to turn on or off, so that the loading and unloading of the multi-split heat pump unit can respond promptly to changes in the actual temperature of the target medium and the temperature difference between the target temperature and the target temperature, and promptly adjust the target medium to the target temperature.

[0056] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0057] In one possible embodiment of this application, a control method for a multi-split heat pump unit is provided. Figure 1 This is a flowchart of a control method for a multi-unit heat pump unit provided in an embodiment of this application, as shown below. Figure 1 As shown, the method includes:

[0058] S101. Detect the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment. The target medium is the medium that the multi-split heat pump unit needs to heat or cool.

[0059] The target medium can be water or air, and the multi-split heat pump unit of this application can be used to regulate the temperature of air or water. The temperature of the target medium can be detected by a temperature sensor.

[0060] S102. Calculate the adjustment cycle based on the temperature difference and the preset cycle, determine the target heat pump that needs to be turned on or off in the multi-unit heat pump according to the preset loading rules, and control the corresponding target heat pump to perform the turn-on or turn-off operation.

[0061] In this step, the next adjustment cycle is calculated based on the temperature difference between the actual temperature and the target temperature of the target medium at the current moment, and a preset cycle. This means that the target heat pump in the multi-split heat pump unit that needs to be turned on or off is determined according to the preset loading rules at the current moment, and the adjustment cycle follows the control of the corresponding target heat pump to perform the on / off operation. This achieves the goal of adjusting the duration of the next adjustment cycle based on the temperature difference between the actual temperature and the target temperature of the target medium at the current moment, thus overcoming the drawback of the fixed adjustment cycle in existing multi-split heat pump units. Preferably, the adjustment cycle length can be inversely proportional to the temperature difference between the actual temperature and the target temperature of the target medium at the current moment; that is, the larger the temperature difference, the shorter the adjustment cycle. This allows the unit to load or unload more quickly when the temperature difference between the actual temperature and the target temperature of the target medium is large at the current moment.

[0062] In this application, a main heat pump can be pre-selected in the multi-split heat pump unit by using a DIP switch. The control unit in the main heat pump calculates the adjustment cycle based on the temperature difference and the preset cycle, determines the target heat pump in the multi-split heat pump unit that needs to be turned on or off according to the preset loading rules, and controls the corresponding target heat pump to perform the turn-on or turn-off operation.

[0063] Optionally, when a multi-split heat pump unit is equipped with a main heat pump, before detecting the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment, the method further includes:

[0064] Control the power supply of the multi-unit heat pump unit;

[0065] In a multi-split heat pump unit, the heat pump with the shortest cumulative operating time is designated as the first heat pump.

[0066] The main heat pump of the multi-split heat pump unit sends a start command to the first heat pump, so that the first heat pump runs for a preset time in response to the start command.

[0067] Powering on a multi-split heat pump unit is equivalent to the preparation process before the unit starts working. During power-on, the multi-split heat pump unit performs the following operations: all control units in the heat pumps start running, and simultaneously collect input from sensors according to program logic; communication occurs between the heat pumps and the main heat pump, and between the main heat pump and the wired controller; and output is controlled. To ensure stable operation of the multi-split heat pump unit, a preset time of two minutes is generally set, meaning that steps S101 to S103 can be executed after the first heat pump has been running for two minutes.

[0068] S103. After the interval adjustment cycle, repeat the above steps starting from the detected temperature difference until the actual temperature of the target medium reaches the target temperature of the target medium.

[0069] After calculating the next adjustment cycle in step S102, after this adjustment cycle, steps S101 and S102 are repeated to calculate the next adjustment cycle, and so on, until the actual temperature of the target medium reaches the target temperature of the target medium.

[0070] The technical effect of this embodiment is that by calculating the next adjustment cycle based on the temperature difference between the actual temperature of the target medium and the target temperature at the current moment, and a preset cycle, the adjustment cycle of the multi-split heat pump unit becomes variable and correlated with the temperature difference between the actual temperature of the target medium and the target temperature. Since each adjustment cycle determines which heat pumps need to be turned on or off according to preset loading rules, the loading or unloading of the multi-split heat pump unit can respond more promptly to changes in the temperature difference between the actual temperature of the target medium and the target temperature, and promptly adjust the actual temperature of the target medium to the target temperature.

[0071] Based on the above embodiments, one possible embodiment of this application provides a method for calculating an adjustment cycle based on a temperature difference and a preset cycle, the method comprising:

[0072] The adjustment period is calculated using the adjustment period calculation formula, which is as follows:

[0073] in, The adjustment period is... For the preset period, The temperature difference, It is a preset parameter and is not equal to 0.

[0074] In this embodiment, It is the temperature difference between the actual temperature of the target medium and the target temperature at the current moment in the previous embodiment. The value can be determined according to actual needs; for example, it can be set to 4. Taking the absolute value is to prevent negative numbers, because the actual temperature of the target medium may be lower than the target temperature of the target medium. The formula for calculating the temperature difference between the actual temperature and the target temperature of the target medium at the current moment can be:

[0075] =

[0076] The target temperature is the target medium.

[0077] set up The purpose is to prevent The calculation is abnormal when the value is 0. For example, it can be set to 1.

[0078] Optionally, if the target heat pump is turned on, it is determined whether the duration of the adjustment cycle is less than the preset minimum duration. If so, the preset minimum duration is used as the duration of the adjustment cycle. Considering that a too short adjustment cycle during the loading process of a multi-split heat pump unit can lead to unstable unit operation, a preset minimum duration is set as the minimum value of the adjustment cycle duration. The specific value of the preset minimum duration is not specifically limited in this application; for example, it can be set to 0.5 minutes.

[0079] The technical effect of this embodiment is that the adjustment period after the current moment can be calculated using this formula, thereby enabling... The larger the value, the shorter the next adjustment cycle, thus enabling the multi-split heat pump unit to adjust the actual temperature of the target medium to the target temperature more promptly.

[0080] Based on the foregoing embodiments, one possible embodiment of this application provides a method for determining the target heat pump that needs to be turned on or off in a multi-unit heat pump system according to a preset loading rule. Figure 2 This is a flowchart illustrating a method for determining the target heat pump to be turned on or off in a multi-unit heat pump system based on preset loading rules, as provided in this application embodiment. Figure 2 As shown, the method includes:

[0081] S201. Calculate the temperature change rate of the target medium;

[0082] Specifically, the formula for calculating the rate of temperature change of the target medium is:

[0083]

[0084] in, The temperature change rate of the target medium. The actual temperature of the target medium at the current moment. The actual temperature of the target medium at the initial moment of the previous adjustment cycle prior to the current moment. The previous adjustment period prior to the current time.

[0085] It is the actual temperature of the target medium at the current moment. It is the adjustment period prior to the current moment. Therefore, in this embodiment... It is the rate of temperature change during the adjustment period prior to the current moment.

[0086] S202. If the temperature change rate and temperature difference of the target medium meet the conditions for adding a working heat pump according to the preset loading rules, then the target start-up heat pump shall be determined according to the rules for adding a working heat pump.

[0087] S203. If the temperature change rate and temperature difference of the target medium meet the conditions for reducing the operating heat pump according to the preset loading rules, then the target heat pump is shut down according to the rules for reducing the operating heat pump.

[0088] In steps S202 and S203, the conditions for adding or reducing the operating heat pump in the preset loading rules can be found in the following table:

[0089] In the table above, + indicates loading, i.e., increasing the operating heat pump, and - indicates unloading, i.e., decreasing the operating heat pump. For example, when It equals 1, and When the temperature is ≥4, the multi-split heat pump unit meets the conditions for adding a working heat pump. At this point, it is necessary to select the target start-up heat pump within the multi-split heat pump unit and control its activation. It equals -2, and When the value is -3, the multi-split heat pump unit meets the conditions for reducing the number of working heat pumps. At this time, it is necessary to select the target heat pump to shut down in the multi-split heat pump unit and control the target to start the heat pump shutdown.

[0090] Optionally, when a multi-split heat pump unit meets the conditions for adding a working heat pump, the heat pump with the shortest cumulative operating time is designated as the target start-up heat pump; when a multi-split heat pump unit meets the conditions for reducing the number of working heat pumps, the heat pump with the longest cumulative operating time is designated as the target shutdown heat pump. The reason for this configuration is that when a heat pump needs to be started, the newest heat pump with the shortest cumulative operating time is prioritized; when a heat pump needs to be shut down, the oldest heat pump with the longest cumulative operating time is shut down in a phased manner. This balances the operating time of each heat pump in the unit, preventing individual heat pumps from prematurely failing due to excessive operating time, thus extending the unit's service life.

[0091] In one possible embodiment of this application, a control device for a multi-unit heat pump is provided. Figure 3 This is a schematic diagram of a control device for a multi-unit heat pump unit provided in an embodiment of this application, as shown below. Figure 3 As shown, the control device 30 of the multi-split heat pump unit includes: a temperature detection module 301, a cycle calculation module 302, a heat pump control module 303, and a main control module 304.

[0092] Temperature detection module 301 is used to detect the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment. The target medium is the medium to be heated or cooled by the multi-split heat pump unit.

[0093] The cycle calculation module 302 is used to calculate the adjustment cycle based on the temperature difference and the preset cycle.

[0094] The heat pump control module 303 is used to determine the target heat pump that needs to be turned on or off in the multi-split heat pump unit according to the preset loading rules, and control the corresponding target heat pump to perform the turn-on or turn-off operation.

[0095] Main control module 304 is used for:

[0096] The adjustment cycle calculated by the cycle calculation module 302 is obtained, and after the adjustment cycle is intermittent, the temperature detection module 301, the cycle calculation module 302, and the heat pump control module 303 are controlled to perform their respective functions.

[0097] Repeat the above function until the actual temperature of the target medium reaches the target temperature of the target medium.

[0098] In one possible embodiment of this application, a control device for a multi-split heat pump unit is provided. Figure 4 This is a schematic diagram of the control equipment for a multi-unit heat pump unit provided in an embodiment of this application, as shown below. Figure 4 As shown, the control device 40 of the multi-split heat pump unit includes: a temperature detection device 401, a memory 402, and a controller 403; the temperature detection device 401, the memory 402, and the controller 403 are connected via a bus 404.

[0099] Temperature detection device 401 is used to detect the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment. The target medium is the medium to be heated or cooled by the multi-split heat pump unit.

[0100] The temperature detection device 401 can be a temperature sensor.

[0101] Memory 402 is used to store computer programs;

[0102] The controller 403 is located at the main heat pump of the multi-split heat pump unit and is used to execute the computer program stored in the memory 402 to realize the control method of the multi-split heat pump unit as described above.

[0103] The controller 403 can be the control unit of the main heat pump of the multi-split heat pump unit, and the control method of the multi-split heat pump unit described above is executed by the main heat pump control unit.

[0104] The specific implementation process of controller 403 can be found in the above method embodiment, and its implementation principle and technical effect are similar. It will not be repeated here.

[0105] In the above Figure 4In the illustrated embodiments, it should be understood that the controller can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0106] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0107] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a specific type of bus.

[0108] In one possible embodiment of this application, a readable storage medium is also provided, on which a computer program is stored; the computer program is used to implement the control method for the multi-unit heat pump unit as described above.

[0109] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0110] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0111] The division of units described herein is merely a logical functional division. 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 coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0112] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0113] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0114] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0115] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0116] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0117] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A control method for a multi-unit heat pump system, characterized in that, The method includes: The temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment is detected. The target medium is the medium that the multi-split heat pump unit needs to heat or cool. The adjustment period is calculated based on the temperature difference and the preset period, wherein the adjustment period is inversely proportional to the temperature difference; Calculate the temperature change rate of the target medium; If, according to the preset loading rules, the temperature change rate of the target medium and the temperature difference meet the conditions for increasing the working heat pump, then in the multi-unit heat pump, the heat pump with the shortest cumulative running time is determined as the target start-up heat pump, and the target start-up heat pump is controlled to perform the start-up operation. If, according to the preset loading rules, the temperature change rate of the target medium and the temperature difference meet the conditions for reducing the operating heat pump, then in the multi-split heat pump unit, the heat pump with the longest cumulative running time is identified as the target shut-off heat pump, and the target shut-off heat pump is controlled to perform a shutdown operation. After the adjustment cycle, the above steps are repeated starting from the detection of the temperature difference until the actual temperature of the target medium reaches the target temperature of the target medium. The step of calculating the adjustment cycle based on the temperature difference and the preset cycle includes: The adjustment period is calculated according to the adjustment period calculation formula, which is as follows: in, The adjustment period is... For the preset period, The temperature difference, The parameter is a preset parameter and is not equal to 0; The formula for calculating the temperature change rate of the target medium is: in, The temperature change rate of the target medium. The actual temperature of the target medium at the current moment. The actual temperature of the target medium at the initial moment of the previous adjustment cycle prior to the current moment. The previous adjustment period prior to the current time.

2. The method according to claim 1, characterized in that, After the target heat pump is started and the above steps are repeated after the adjustment period starting from the detection of the temperature difference, the method further includes: Determine whether the duration of the adjustment period is less than a preset minimum duration: If so, the preset minimum duration shall be used as the duration of the adjustment cycle.

3. The method according to claim 1 or 2, characterized in that, Before detecting the temperature difference between the actual temperature of the target medium at the current moment and the target temperature of the target medium, the method further includes: Control the power supply of the multi-unit heat pump unit; In the multi-unit heat pump system, the heat pump with the shortest cumulative operating time is designated as the first heat pump. The main heat pump of the multi-unit heat pump is controlled to send a start command to the first heat pump, so that the first heat pump runs for a preset time in response to the start command.

4. A control device for a multi-unit heat pump unit, characterized in that, The device includes: The temperature detection module is used to detect the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment, wherein the target medium is the medium to be heated or cooled by the multi-split heat pump unit. A cycle calculation module is used to calculate an adjustment cycle based on the temperature difference and a preset cycle; wherein the adjustment cycle is inversely proportional to the temperature difference; wherein calculating the adjustment cycle based on the temperature difference and the preset cycle includes: The adjustment period is calculated according to the adjustment period calculation formula, which is as follows: in, The adjustment period is... For the preset period, The temperature difference, The parameter is a preset parameter and is not equal to 0; A heat pump control module is used to calculate the temperature change rate of the target medium. If, according to preset loading rules, the temperature change rate of the target medium and the temperature difference meet the conditions for increasing the operating heat pump, then in the multi-split heat pump unit, the heat pump with the shortest cumulative operating time is identified as the target start-up heat pump, and the target start-up heat pump is controlled to perform an on-start operation. If, according to the preset loading rules, the temperature change rate of the target medium and the temperature difference meet the conditions for decreasing the operating heat pump, then in the multi-split heat pump unit, the heat pump with the longest cumulative operating time is identified as the target shutdown heat pump, and the target shutdown heat pump is controlled to perform a shutdown operation. The formula for calculating the temperature change rate of the target medium is: in, The temperature change rate of the target medium. The actual temperature of the target medium at the current moment. The actual temperature of the target medium at the initial moment of the previous adjustment cycle prior to the current moment. The previous adjustment period prior to the current moment; The main control module is used for: The adjustment period calculated by the period calculation module is obtained, and after an interval of the adjustment period, the temperature detection module, the period calculation module, and the heat pump control module are controlled to perform their respective functions. Repeat the above function until the actual temperature of the target medium reaches the target temperature of the target medium.

5. A control device for a multi-unit heat pump unit, characterized in that, The device includes: a temperature detection device, a memory, and a controller; The temperature detection device is used to detect the temperature difference between the actual temperature of the target medium and the target temperature of the target medium at the current moment. The target medium is the medium that the multi-split heat pump unit is to heat or cool. The memory is used to store computer programs; The controller is located at the main heat pump of the multi-split heat pump unit and is used to execute the computer program stored in the memory to implement the control method of the multi-split heat pump unit as described in any one of claims 1 to 3.

6. A readable storage medium, characterized in that, The readable storage medium stores a computer program; the computer program is used to implement the control method for the multi-unit heat pump unit as described in any one of claims 1 to 3.

Images