Air conditioning system and control method of air conditioning system

Abstract

The invention discloses an air conditioning system and a control method of the air conditioning system, relates to the technical field of air conditioners, and aims to solve the problem that when a plurality of air source heat pump units are used for heating, a cold island effect is formed due to too close distance, so that the energy consumption of the air conditioning system is relatively high. The method comprises the steps that the total number of first units of the air source heat pump units needing to be started and matched with the first load requirement of the air conditioning system is determined; and according to the total number of the first units and the number of the multiple areas divided for the multiple air source heat pump units, the number of turns for starting the units and the number of the units needing to be started in each turn are determined. And according to the position of the air source heat pump unit in each area and a preset unit screening rule, the heat pump unit needing to be started in each turn is started.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning system and a control method of the air conditioning system. Background Art

[0002] As users' living standards improve, air-conditioning systems play an increasingly important role in their daily lives.

[0003] At present, heat pump units are mainly used as the heat source for air-conditioning system heating to meet users' heating needs.

[0004] However, in actual applications, when a heat pump group is used for heating in winter, multiple heat pump units in the heat pump group are often turned on in the same area. Since the distance between the multiple heat pump units is too close, the evaporation temperature of the heat pump units is reduced, resulting in a cold island effect between the multiple heat pump units, which increases the energy consumption of the air-conditioning system. Summary of the invention

[0005] The embodiments of the present invention provide an air conditioning system and a control method for the air conditioning system, which solve the problem that when multiple heat pump units are heated, a cold island effect is formed due to their close distance, resulting in high energy consumption of the air conditioning system.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] In a first aspect, the present application provides an air conditioning system, comprising: a heat pump unit group, the heat pump unit group comprising a plurality of heat pump units, the heat pump unit group being a group of devices providing a heat source in the air conditioning system;

[0008] A controller is coupled to the heat pump unit group, and the controller is configured to control some of the heat pump units in the heat pump unit group to be turned on or off. The controller is also configured to: determine the total number of first units of the heat pump units that need to be turned on to match the first load demand of the air-conditioning system. According to the total number of the first units and the number of regions into which the multiple heat pump units are divided, determine the number of rounds of turning on the heat pump units and the number of heat pump units to be turned on in each round. According to the location of the heat pump units in each region and the preset unit screening rules, turn on the heat pump units that need to be turned on in each round.

[0009] Therefore, the present application first determines the total number of first units of heat pump units that need to be turned on to match the first load demand of the air-conditioning system. Then, according to the total number of first units and the number of regions divided by the multiple heat pump units, the number of rounds of turning on the units and the number of units that need to be turned on in each round are determined. Finally, according to the position of the heat pump units in each region and the preset unit screening rules, the heat pump units that need to be turned on in each round are turned on. Compared with the prior art, when the heat pump unit group is heating in winter, multiple heat pump units in the heat pump unit group are often concentrated in the same area and turned on. The present application turns on the units according to the position of the heat pump units in each region and the preset unit screening rules, thereby avoiding the situation where multiple heat pump units are concentrated in the same area and turning on, thereby reducing the energy consumption of the air-conditioning system.

[0010] In some embodiments, when determining the heat pump units to be started in the first round, according to the positions of the heat pump units in each area and the preset unit screening rules, starting the heat pump units to be started in each round includes: determining the first unit among the heat pump units that are not started in the first area of ​​the multiple areas, and using the first unit as the main unit. Sequentially determine the second unit corresponding to each area of ​​the multiple areas except the first area, wherein for any area in the remaining areas, the selected second unit is the heat pump unit farthest from the main unit in any area.

[0011] In some embodiments, when determining the heat pump units to be turned on in any round after the first round, according to the positions of the heat pump units in each area and the preset unit screening rules, turning on the heat pump units to be turned on in each round includes: for each area in the plurality of areas, taking each heat pump unit among the unturned heat pump units in each area as the center of the circle, determining the number of first heat pump units that have been turned on for each heat pump unit within the radius of the area to which it belongs. According to the number of first heat pump units within the radius of each heat pump unit among the unturned heat pump units in each area, determining the third unit corresponding to each area, the third unit being the heat pump unit with the least number of first heat pump units within the radius of the third unit.

[0012] In some embodiments, the preset unit screening rules also include: for any turbine heat pump unit determination process after the first round, when there are multiple heat pump units with the least number of first heat pump units in any of the multiple areas, the heat pump unit with the shortest running time among the multiple heat pump units is selected as the third unit.

[0013] In some embodiments, after the heat pump unit that needs to be turned on has run for a first preset time, the controller is further configured to determine a second load demand of the air conditioning system. When the second load demand is greater than the first load demand, the controller is further configured to continue to turn on at least one heat pump unit in multiple areas according to a preset unit screening rule. When the second load demand is less than the first load demand, the controller is further configured to turn off at least one heat pump unit with the longest running time among the heat pump units that have been turned on in multiple areas according to the running time of each unit among the heat pump units that have been turned on in multiple areas. Wherein, at least one heat pump unit is determined based on the difference between the total number of second units and the total number of first units of the heat pump units that need to be turned on to match the second load demand.

[0014] In a second aspect, the present application provides a control method for an air-conditioning system, the method comprising: determining the total number of first units of heat pump units that need to be turned on to match the first load demand of the air-conditioning system. According to the total number of first units and the number of regions into which the multiple heat pump units are divided, determining the number of rounds of turning on the heat pump units and the number of heat pump units to be turned on in each round. According to the location of the heat pump units in each region and the preset unit screening rules, the heat pump units to be turned on in each round are turned on.

[0015] For the beneficial effects of the second aspect, reference may be made to the first aspect and no further details will be given here.

[0016] In some embodiments, when determining the heat pump units to be turned on in the first round, according to the positions of the heat pump units in each area and the preset unit screening rules, turning on the heat pump units to be turned on in each round includes: determining the first unit dial code among the unit dial codes of the heat pump units that are not turned on in the first area of ​​the multiple areas, and using the heat pump unit corresponding to the first unit dial code as the main unit. Sequentially determine the second unit corresponding to each area of ​​the remaining areas except the first area, wherein for any area in the remaining areas, the selected second unit is the heat pump unit farthest from the main unit in any area.

[0017] In some embodiments, when determining the heat pump units to be turned on in any round after the first round, according to the positions of the heat pump units in each area and the preset unit screening rules, turning on the heat pump units to be turned on in each round includes: for each area in the plurality of areas, taking each heat pump unit among the unturned heat pump units in each area as the center of the circle, determining the number of first heat pump units that have been turned on for each heat pump unit within the radius of the area to which it belongs. According to the number of first heat pump units within the radius of each heat pump unit among the unturned heat pump units in each area, determining the third unit corresponding to each area, the third unit being the heat pump unit with the least number of first heat pump units within the radius.

[0018] In some embodiments, the preset unit screening rules also include: for any round of heat pump unit determination process after the first round, when there are multiple heat pump units with the least number of first heat pump units in any of the multiple areas, the heat pump unit with the shortest running time among the multiple heat pump units is selected as the third unit.

[0019] In some embodiments, the method further includes: after the heat pump unit that needs to be turned on has run for a first preset time, determining a second load demand of the air conditioning system. When the second load demand is greater than the first load demand, continue to turn on at least one heat pump unit in multiple areas according to a preset unit screening rule. When the second load demand is less than the first load demand, according to the running time of each unit in the heat pump units that have been turned on in multiple areas, turn off at least one heat pump unit with the longest running time among the heat pump units that have been turned on in multiple areas. Wherein, at least one heat pump unit is determined based on the difference between the total number of second units and the total number of first units of the heat pump units that need to be turned on to match the second load demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the architecture of an air conditioning system 100;

[0021] Figure 2 A schematic diagram of a heat pump unit in an existing group of activated heat pump units;

[0022] Figure 3 A schematic diagram of another existing heat pump unit in a heat pump unit group;

[0023] Figure 4 A schematic diagram of a process provided for this application;

[0024] Figure 5 A schematic diagram of the regional division and coordinate system establishment of multiple air source heat pump units provided in this application;

[0025] Figure 6 A schematic diagram of the dial codes and coordinate numbers of multiple air source heat pump units provided in this application;

[0026] Figure 7 A flow chart of an air conditioning system control method provided in this application;

[0027] Figure 8 A schematic diagram of a process flow of a controller controlling the first round of opening provided in this application;

[0028] Fig. 9 A schematic diagram of a flow chart of a controller controlling each round of opening after the first round of opening provided in the present application;

[0029] Fig.10A schematic diagram of the radius range of an unactivated air source heat pump unit provided in the present application;

[0030] Fig.11 A flow chart of an air conditioning system control method provided in this application. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "coupling" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, when describing pipelines or channels, the "coupling" used in this application has the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0034] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0035] The embodiments of the present application are applied to the equipment framework of an air-cooled module unit group or an air source heat pump unit group.

[0036] Air-cooled module units are integrated central air-conditioning equipment based on modular technology, using air as a cooling medium and a dual-purpose cooling source, or using air as a heating medium and a dual-purpose heating source. Generally, air-cooled module units are divided into single refrigeration type and heat pump type. Air-cooled module units generally refer to heat pump type air-cooled module units, also known as air-cooled heat pump units.

[0037] The air-cooled module unit has the advantages of high efficiency, low noise, reasonable structure, simple operation, safe operation, convenient installation and maintenance, etc. It is widely used in public places such as hotels, shopping malls, office buildings, exhibition halls, airports, gymnasiums, etc., and can meet the different use requirements of air-conditioning systems in the electronics, pharmaceuticals, biology, light textiles, chemicals, metallurgy, electricity, machinery and other industries.

[0038] Among them, the air-cooled heat pump unit integrates the functions of cooling and heating, can provide cooling and heating, can achieve cooling in summer and heating in winter, and has multiple uses. Therefore, the air-cooled heat pump unit is usually the preferred solution in the HVAC engineering design that requires year-round air conditioning without a heating boiler, a heating network or other stable and reliable heat source. The unit can be combined with fan coil units or cabinet-type, ceiling-type air handling units and fresh air units to form a semi-centralized air conditioning system. It has many advantages of fan coil systems, such as flexible layout, beautiful appearance, saving building space, convenient adjustment, can be stopped and started independently without affecting other rooms, and low operating noise.

[0039] Usually, an air-cooled heat pump unit is a circulation system composed of a compressor, a heat exchanger, a throttle, a heat absorber and a compressor.

[0040] The air source heat pump unit is a closed system composed of four major components: evaporator, condenser, compressor, and expansion valve. The closed system is filled with an appropriate amount of working fluid. The air source heat pump unit is based on the reverse card cycle principle, in which the liquid working fluid first absorbs the heat in the air in the evaporator and evaporates to form steam (vaporization). The latent heat of vaporization is the recovered heat, and then it is compressed into high-temperature and high-pressure gas by the compressor, and enters the condenser to condense into liquid (liquefaction) and send the absorbed heat to the required heated water. The liquid working fluid returns to the expansion valve after the expansion valve reduces the pressure and expands, absorbs heat and evaporates to complete a cycle, and repeats this process, continuously absorbing the heat from the low-temperature source and outputting it to the heated water, directly reaching the user's predetermined temperature.

[0041] like Figure 1 The figure shows a schematic diagram of the architecture of an air conditioning system 100, which includes a heat pump unit group 101 and a controller 102. The heat pump unit group 101 includes a plurality of heat pump units 1011. The plurality of heat pump units 101 include a host unit and the rest are slave units. The host unit and the slave units are connected via a communication line, and the host unit can control the opening or closing of the slave units. According to the running time of the heat pump unit 1011, the slave unit can be switched to the host unit to extend the service life of the heat pump unit 1011.

[0042] The heat pump unit group 101 is a group of devices that provide heat sources in the air conditioning system 100. A plurality of air source heat pump units are configured to absorb heat from the air to heat water.

[0043] Each heat pump unit 1011 may be the air-cooled heat pump unit or the air source heat pump unit mentioned above, or may be other types of heat pump units, which is not limited in the present application.

[0044] The controller 102 is coupled to the heat pump group 101, and is configured to control the opening or closing of some heat pump groups 1011 in the heat pump group 101. The controller 102 is a general term for a switch device mainly used to control electrical equipment, and a combination of these switch devices and related control, measurement, protection and regulation equipment. It includes an assembly consisting of these devices and equipment and associated internal connections, accessories, housings and supports.

[0045] In some embodiments, the controller 102 may also be a terminal device. The terminal device may be a device with transceiver functions. The terminal device may be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it may also be deployed on the water (such as ships, etc.); it may also be deployed in the air (for example, on airplanes, balloons, and satellites, etc.). The terminal device includes a handheld device, a vehicle-mounted device, a wearable device, or a computing device with wireless communication functions. Exemplarily, the terminal device may be a mobile phone, a tablet computer, or a computer with wireless transceiver functions, or a smart speaker. The terminal device may also be a virtual reality terminal device, an augmented reality terminal device, a wireless terminal device in industrial control, a wireless terminal device in unmanned driving, a wireless terminal device in telemedicine, a wireless terminal device in a smart grid, a wireless terminal device in a smart city, a wireless terminal device in a smart home, and the like.

[0046] In order to reduce the energy consumption of the air-conditioning system, one way is to control the start and stop of the compressors in the air-source heat pump units other than the main unit one by one according to the running time. However, this traditional load-on-load-off strategy is a balanced control for balancing the service life of the compressor, and does not take into account the impact of the placement of the air-source heat pump units in the air-source heat pump unit group on energy efficiency during actual use. For example, if the air-source heat pump units in a certain area of ​​the air-source heat pump unit group are all in heating operation, the cold island effect will cause the working efficiency and heating capacity of the air-source heat pump units to decrease, resulting in a vicious cycle of repeated frosting and defrosting of the air-source heat pump units.

[0047] For example, the number of the plurality of heat pump units 1011 may be 16, 36 or 64. Figure 2 FIG. 1 is a schematic diagram showing a conventional heat pump unit 1011 in a heat pump unit group 101. Figure 2 It can be seen that multiple heat pump units 1011 are concentrated in the middle area, for example Figure 2 In the middle area, 16 heat pump units 1011 were turned on.

[0048] Figure 3It is a schematic diagram of another existing heat pump unit in a heat pump unit group.

[0049] like Figure 3 As shown, multiple heat pump units 1011 are concentrated and turned on in the corner area. Figure 3 A total of 22 heat pump units 1011 were started.

[0050] Combination Figure 2 and Figure 3 It can be seen that, when the heat pump unit group 101 is currently heating, multiple heat pump units 1011 are usually turned on in the middle area and corner areas. The heat pump units 1011 are too close to each other, resulting in a cold island effect, which increases the energy consumption of the heat pump units 1011. Figure 2 It can be seen that in some areas, the number of heat pump units 1011 that are started and operated simultaneously is relatively large, while in some areas, the number of heat pump units 1011 that are started and operated simultaneously is relatively small, resulting in the problem of unbalanced load distribution of the heat pump unit group 101.

[0051] Another way is to add a guide device to the exhaust port of the heat pump unit 1011 to guide the cold air to a location away from the unit group, but this method requires a large investment and the construction of the guide device is also difficult.

[0052] In view of this, the present application proposes a control method for an air conditioning system. Through the mapping relationship between the coordinate position of the heat pump unit and the dial code, and through the changing relationship between the ambient temperature and the operating time of each heat pump unit, the start and stop control of the heat pump units at different positions is realized, thereby avoiding the problem of the cold island effect caused by the concentrated start-up and operation of adjacent heat pump units, and reducing the energy consumption of the heat pump unit group.

[0053] In order to prevent multiple heat pump units 1011 from being turned on in a concentrated manner during heating, the air conditioning system 100 adds a process before the controller 102 controls some of the heat pump units 1011 to turn on or off. The controller 102 divides the multiple heat pump units 1011 into regions and establishes a coordinate system. The heat pump units 1011 are controlled to turn on or off according to the region groups.

[0054] like Figure 4 The figure shows a schematic flow chart of a process provided by the present application.

[0055] S401. The controller 102 divides the multiple heat pump units 1011 into regions and establishes a coordinate system.

[0056] Exemplarily, the staff installs the multiple heat pump units 1011 in different areas according to the on-site conditions of the project, and the controller 102 divides the locations where the multiple heat pump units 1011 are arranged into different areas.

[0057] like Figure 5 As shown, it is a schematic diagram of the regional division and coordinate system establishment of multiple heat pump units 1011 provided in the present application.

[0058] Depend on Figure 5 It can be seen that the multiple heat pump units 1011 are divided into four areas A, B, C and D. Among them, the number of heat pump units 1011 in each area is equal. In some embodiments, the number of heat pump units 1011 in each area may also be unequal, which is not limited in this application. The number of divided areas is also not limited to 4, which is not limited in this application. This application is described with the number of divided areas being 4.

[0059] In the area where the multiple heat pump units 1011 are located, the multiple heat pump units 1011 are arranged equidistantly in the horizontal and vertical directions, and a coordinate system of the multiple heat pump units 1011 is established.

[0060] S402 . The controller 102 marks each heat pump unit 1011 .

[0061] Exemplarily, the controller 102 marks each heat pump unit 1011 according to the coordinate position, that is, each heat pump unit 1011 has a unique coordinate number. In addition, the controller 102 assigns a unique dial code to each heat pump unit 1011. Among them, the dial code and the coordinate number of each heat pump unit 1011 are in a mapping relationship, that is, the dial code and the coordinate number of each heat pump unit 1011 are one-to-one corresponding.

[0062] like Figure 6 As shown, it is a schematic diagram of the dial codes and coordinate numbers of multiple heat pump units 1011 provided in the present application.

[0063] It can be seen that in the four areas A, B, C and D, each heat pump unit 1011 has a unique coordinate number and dial code. For example, in area A, the heat pump unit 1011 with the dial code A1 and the coordinate number (-3,3) is not described here. The dial codes and coordinate numbers of the other heat pump units 1011 are not repeated here.

[0064] S403, the controller 102 controls the multiple heat pump units 1011 to turn on or off in different areas and groups.

[0065] Exemplarily, the controller 102 controls the heat pump units 1011 that need to be turned on among the multiple heat pump units 1011 to be turned on in the order of A→B→C→D, and only one heat pump unit 1011 is turned on in each area in each round. For example, assuming that 5 heat pump units 1011 need to be turned on, the turning-on result of the heat pump units 1011 can be A1→B3→C8→D6→A9. It can be seen that when 5 heat pump units 1011 need to be turned on, a total of 2 rounds need to be turned on, and only one heat pump unit 1011 is turned on in each area in each round. In the first round, the controller 102 first controls A1 in area A to turn on, then controls B3 in area B to turn on, then controls C8 in area C to turn on, and then controls D6 in area D to turn on. In the second round, the controller 102 controls A9 in area A to turn on.

[0066] based on Figure 4 The following is an introduction to the process before the controller 102 controls some of the heat pump units 1011 among the multiple heat pump units to turn on or off. Figure 7 FIG. 1 is a flow chart showing a method for controlling an air conditioning system 100. Figure 7 As shown, the method includes the following process.

[0067] S701 , the controller 102 determines the total number of first units of the heat pump units 1011 that need to be turned on to match the first load demand of the air-conditioning system 100 .

[0068] The first load demand here can be understood as the load rate of the heat pump unit 1011 required to meet the user's demand. The total number of first units can be understood as the number of heat pump units 1011 that need to be turned on.

[0069] Exemplarily, first, the sensor of the air-conditioning system 100 sends the collected indoor temperature and outdoor temperature to the controller 102. The controller 102 receives the indoor temperature and outdoor temperature sent by the sensor. Then, the controller 102 calculates the first load demand according to the difference between the indoor temperature and the outdoor temperature. Then, the controller 102 matches the total number of first units that need to be turned on according to the first load demand. For example, the controller 102 calculates that the first load demand is 650 kilowatts (KW) based on the difference between the indoor temperature and the outdoor temperature. The first load demand of 650KW is equivalent to the output capacity of 10 heat pump units 1011 running simultaneously. The total number of first units of the heat pump units 1011 that the controller 102 matches to be turned on according to the first load demand of 650KW is 10.

[0070] S702 , the controller 102 determines the number of rounds for starting the heat pump units 1011 and the number of heat pump units 1011 to be started in each round according to the total number of first units and the number of regions into which the multiple heat pump units 1011 are divided.

[0071] Taking the A, B, C, and D areas divided above as an example, the number of areas here may be, for example, 4. The present application does not limit the number of areas.

[0072] For example, it is assumed that the total number of the first unit is 10, that is, the number of heat pump units 1011 that need to be turned on is 10, and the number of regions is 4. Since the controller 102 controls the heat pump units 1011 that need to be turned on among the multiple heat pump units 1011 to be turned on in the order of A→B→C→D, and only one heat pump unit 1011 is turned on in each region in each round. It can be seen that a total of 3 rounds need to be turned on, 4 heat pump units 1011 need to be turned on in the first round, 4 heat pump units 1011 also need to be turned on in the second round, and 2 heat pump units 1011 need to be turned on in the third round.

[0073] S703: The controller 102 starts the heat pump units 1011 that need to be started in each round according to the positions of the heat pump units 1011 in each area and the preset unit screening rules.

[0074] The location here can be understood as the coordinate number above.

[0075] Therefore, the present application first determines the total number of first units of heat pump units 1011 that need to be turned on to match the first load demand of the air-conditioning system 100. Then, according to the total number of first units and the number of regions divided by the multiple heat pump units 1011, the number of rounds of turning on the heat pump units 1011 and the number of heat pump units 1011 that need to be turned on in each round are determined. Finally, according to the position of the heat pump units 1011 in each region and the preset unit screening rules, the unit dial code of the number of heat pump units 1011 turned on in each round in each region is determined, and the heat pump unit 1011 corresponding to the unit dial code is turned on. Compared with the prior art, when the heat pump unit group 101 is used for heating in winter, the multiple heat pump units 1011 in the heat pump unit group 101 are often turned on in the same area. The present application starts the heat pump unit 1011 according to the location of the heat pump unit 1011 in each area and a preset unit screening rule, thereby avoiding starting multiple heat pump units 1011 in the same area and reducing the energy consumption of the air-conditioning system 100.

[0076] In some embodiments, when the controller 102 determines the number of heat pump units to be started in the first round, starting the heat pump units 1011 to be started in each round includes the following process according to the location of the heat pump units 1011 in each area and the preset unit screening rules.

[0077] Figure 8 A schematic diagram of a process of the controller 102 controlling the first round of opening is shown.

[0078] S801, the controller 102 determines a first unit dial code among the unit dial codes of the heat pump units 1011 that are not turned on in a first area among multiple areas, and uses the heat pump unit 1011 corresponding to the first unit dial code as a main unit.

[0079] The multiple regions here may be, for example, 4 regions. The first region here may be, for example, region A, and the present application does not limit the first region.

[0080] Exemplarily, the controller 102 determines the non-activated heat pump unit 1011 corresponding to the dial code A1 in the A area as the main unit.

[0081] It should be understood that, according to the accumulated operating time of the heat pump unit 1011 , the host can be reallocated to balance the operating time of the heat pump unit 1011 and extend the service life of the heat pump unit 1011 .

[0082] S802, the controller 102 sequentially determines the second unit corresponding to each of the remaining areas except the first area in the plurality of areas, wherein for any area in the remaining areas, the selected second unit is the heat pump unit 1011 in any area that is farthest from the main unit.

[0083] Exemplarily, the controller 102 first determines that the dial code of the heat pump unit 1011 in area B that is farthest from the host group A1 is B9, then determines that the dial code of the heat pump unit 1011 in area C that is farthest from the host group A1 is C9, and finally determines that the dial code of the heat pump unit 1011 in area D that is farthest from the host group A1 is D9.

[0084] That is, when the controller 102 determines the heat pump unit 1011 to be turned on in the first round, it first determines the dial code A1 corresponding to the host unit in area A, and turns on the host unit according to the dial code corresponding to host unit A1. Then, the dial code B9 of the heat pump unit 1011 farthest from the host unit in area B is determined, and a control command is sent to the host. The host turns on the heat pump unit 1011 corresponding to B9 according to the received control command. Then, the dial code C9 of the heat pump unit 1011 farthest from the host unit in area C is determined, and a control command is sent to the host. The host turns on the heat pump unit 1011 corresponding to C9 according to the received control command C9. Then, the dial code D9 of the heat pump unit 1011 farthest from the host unit in area D is determined, and a control command is sent to the host. The host turns on the heat pump unit 1011 corresponding to D9 according to the received control command.

[0085] In some embodiments, when the controller 102 determines the number of heat pump units 1011 to be turned on in any round after the first round, turning on the heat pump units to be turned on in each round includes the following process according to the location of the heat pumps 1011 in each area and preset unit screening rules.

[0086] Fig. 9 A schematic diagram of a process flow of the controller 102 controlling each round of opening after the first round of opening is shown.

[0087] S901. The controller 102 determines, for each of the multiple areas, the number of first heat pump units 1011 that are turned on within a radius of the area to which each heat pump unit 1011 belongs, with each heat pump unit 1011 that is not turned on in each area as the center of a circle.

[0088] Here, the radius is inversely proportional to the number of heat pump units 1011 that have been turned on. Assuming that the radius is r and the number of heat pump units 1011 that have been turned on is k, then r=f(k). It can be seen that when the number of heat pump units 1011 that are turned on increases, the radius range r also decreases. For example, when k=2, r=4L. When k=4, r=2L. Wherein, L is the minimum standard spacing that the heat pump unit 1011 can be installed.

[0089] The number k of the turned-on heat pump units 1011 is equal to the integer of the quotient obtained by dividing the total number of the first units by the number of regions. For example, assuming that the total number of the first units is N and N=10, the number of regions is n and n=4. It can be seen that 10 divided by 4 is equal to 2 with a remainder of 2, that is, the number k=2.

[0090] It should be understood that when the number of heat pump units 1011 started in each round is equal to the number of regions, the number of groups is equal to the number of rounds. When the number of heat pump units 1011 started in the last round is not equal to the number of regions, the number of groups + 1 is equal to the number of rounds. For example, when the total number of the first unit is 10, a total of 3 rounds need to be started, and the number of groups k is 2. When the total number of the first unit is 12, a total of 3 rounds need to be started, and the number of groups k is 3.

[0091] For example, after the first round of heat pump units 1011 are turned on, the controller 102 takes each of the unturned heat pump units 1011 in the A, B, C and D areas as the center of the circle, and determines the number of first heat pump units 1011 that have been turned on within the radius r of each heat pump unit 1011. For example, after the controller 102 turns on A1, B9, C9 and D9 in the first round, the controller 102 determines that the heat pump units 1011 in the A area are turned on by A. 2-9 is the number of heat pump units 1011 that have been turned on within the range of the circle center radius r, and ... 1-8 is the number of heat pump units 1011 that have been turned on within the range of the circle center radius r, C area is C 1-8 is the number of heat pump units 1011 that have been turned on within the range of the circle center radius r and the D area is represented by D 1-8 is the number of heat pump units 1011 that have been turned on within the range of the circle center radius r.

[0092] S902, the controller 102 determines the third unit corresponding to each area according to the number of first heat pump units 1011 within the radius of each heat pump unit 1011 that is not turned on in each area, and the third unit is the heat pump unit 1011 with the least number of first heat pump units 1011 within the radius.

[0093] In one embodiment, for any round of unit determination process after the first round, when there are multiple heat pump units with the least number of first heat pump units 1011 in any of the multiple areas, the heat pump unit 1011 with the shortest operating time among the multiple heat pump units 1011 is used as the third unit.

[0094] The third unit here can be understood as the heat pump unit 1011 that needs to be turned on.

[0095] Exemplarily, the controller 102 determines the dial code of the heat pump unit 1011 with the least number of first heat pump units 1011 within the radius of each heat pump unit 1011 in each area that is not turned on. If the number of first heat pump units 1011 within the radius of each heat pump unit 1011 in any area that is not turned on is equal, the heat pump unit with the shortest running time is used as the third unit.

[0096] Fig.10 A schematic diagram of the radius range of a heat pump unit 1011 that is not turned on is shown.

[0097] Depend on Fig.10It can be seen that at the beginning of the second round of control, the controller 102 confirms that the number of first heat pump units 1011 within the radius of A9 in the A region is the least. Then the controller 102 determines the heat pump unit 1011 corresponding to A9, sends a control command to the host, and the host controls the heat pump unit 1011 corresponding to A9 to turn on according to the received control command. Then the controller 102 confirms that the number of first heat pump units 1011 within the radius of B1 in the B region is the least, the controller 102 determines the heat pump unit 1011 corresponding to B1, sends a control command to the host, and the host controls the heat pump unit 1011 corresponding to B1 to turn on according to the received control command. Then the controller 102 confirms that the number of first heat pump units 1011 within the radius of C1 in the C region and the number of first heat pump units 1011 within the radius of C4 are equal, that is, the radius of C1 includes the turned-on A9, and the radius of C4 includes the turned-on D9. The controller 102 determines the cumulative running time of the heat pump unit 1011 corresponding to C1 and the heat pump unit 1011 corresponding to C4. Assuming that the controller 102 determines that the cumulative running time of the heat pump unit 1011 corresponding to C4 is shorter than the running time of the heat pump unit 1011 corresponding to C1, the heat pump unit 1011 corresponding to C4 is controlled to be turned on. Then the controller 102 determines that the number of first heat pump units 1011 within the radius of D1 in the D area is the least. Then the controller 102 determines the heat pump unit 1011 corresponding to D1 and sends a control command to the host. The host controls the heat pump unit 1011 corresponding to D1 to be turned on according to the received control command.

[0098] Similarly, the controller 102 controls each subsequent round in a similar manner to the second round, and will not be described in detail here.

[0099] based on Figure 7 , Figure 8 , Fig. 9 As described above, as the load demand of the air-conditioning system 100 changes, the air-conditioning system 100 needs to perform on-off control of the heat pump unit 1011 to increase or decrease the load.

[0100] like Fig.11 FIG. 1 is a flow chart of a control method of an air conditioning system 100 provided in the present application. The method includes the following process.

[0101] S1101 , after the heat pump unit 1011 that needs to be turned on has been running for a first preset time, the controller 102 determines a second load demand of the air-conditioning system 100 .

[0102] The first preset time here may be, for example, t minutes, which is not limited in this application.

[0103] Exemplarily, when the heat pump unit 1011 to be turned on runs for the first preset time, the sensor of the air conditioning system 100 sends the re-collected indoor temperature and outdoor temperature to the controller 102. The controller 102 calculates the second load demand according to the difference between the re-collected indoor temperature and outdoor temperature.

[0104] S1102 : The controller 102 determines whether the second load demand is greater than the first load demand.

[0105] When the second load demand is greater than the first load demand, step 1103 is executed.

[0106] When the second load demand is less than the first load demand, step 1104 is executed.

[0107] S1103, the controller 102 continues to start at least one heat pump unit 1011 in the multiple areas according to the preset unit screening rule.

[0108] In one embodiment, at least one heat pump unit 1011 is determined based on the difference between the total number of second units and the total number of first units of the heat pump units 1011 that need to be turned on to match the second load demand.

[0109] The second load demand is greater than the first load demand, that is, the total number of second units of the heat pump units 1011 that need to be turned on to match the second load demand is greater than the total number of first units of the heat pump units 1011 that need to be turned on to match the first load demand.

[0110] Exemplarily, the controller 102 matches the total number of second units of the heat pump units 1011 that need to be turned on after the first preset time according to the second load demand. For example, assume that the total number of second units of the heat pump units 1011 that need to be turned on according to the second load demand is 12. The total number of first units of the heat pump units 1011 that need to be turned on according to the first load demand is 10. It can be seen that the controller 102 needs to turn on 2 more heat pump units 1011 after the first preset time. The controller 102 continues to turn on the two heat pump units 1011 according to the preset unit screening rules. How to continue to turn on the two heat pump units 1011 according to the preset unit screening rules has been introduced above and will not be repeated here.

[0111] S1104: The controller 102 turns off at least one heat pump unit 1011 with the longest running time among the heat pump units 1011 turned on in the multiple areas according to the running time of each unit among the heat pump units 1011 turned on in the multiple areas.

[0112] Exemplarily, when the total number of second units of the heat pump units 1011 that need to be turned on to match the second load demand is less than the total number of first units of the heat pump units 1011 that need to be turned on to match the first load demand, for example, assuming that the total number of second units of the heat pump units 1011 that need to be turned on to match the second load demand is 8, and the total number of first units of the heat pump units 1011 that need to be turned on to match the first load demand is 10. The controller 102 controls the two heat pump units 1011 with the longest running time among the 10 turned-on heat pump units 1011 to be turned off.

[0113] In some embodiments, the present application further provides a storage medium storing a computer program, which implements the steps of the above method when the program is executed by a processor. The present application further provides a control system, including a processor, a memory, and a computer program stored in the memory and executable on the processor, which implements the steps of the above air conditioning system control method when the processor executes the program.

[0114] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other changes to the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0115] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0116] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air conditioning system, characterized in that: include: A heat pump unit group, the heat pump unit group includes a plurality of heat pump units, and the heat pump unit group is a group of equipment that provides a heat source in the air conditioning system; A controller, the controller is coupled to the heat pump group, and the controller is configured to control some of the heat pump groups in the heat pump group to turn on or off; The controller is further configured to: Determine the total number of first units of the heat pump units that need to be turned on to match the first load demand of the air-conditioning system; Determine the number of rounds of starting the heat pump units and the number of heat pump units to be started in each round according to the total number of the first units and the number of regions into which the plurality of heat pump units are divided; According to the location of the heat pump units in each area and the preset unit screening rules, the heat pump units that need to be turned on in each round are turned on.

2. The air conditioning system according to claim 1, characterized in that: When determining the heat pump units to be started in the first round, starting the heat pump units to be started in each round according to the positions of the heat pump units in each area and the preset unit screening rules includes: Determine a first unit among the heat pump units that are not turned on in a first area of ​​the multiple areas, and use the first unit as a main unit; The second unit corresponding to each area of ​​the plurality of areas except the first area is determined in sequence, wherein for any area of ​​the remaining areas, the selected second unit is the heat pump unit farthest from the main unit in any area.

3. The air conditioning system according to claim 2, characterized in that: When determining the heat pump units to be started in any round after the first round, starting the heat pump units to be started in each round according to the positions of the heat pump units in each area and the preset unit screening rules includes: For each of the plurality of regions, taking each of the unactivated heat pump units in each region as the center of a circle, determining the number of activated first heat pump units within a radius of the region to which each heat pump unit belongs; According to the number of the first heat pump units within the radius of each heat pump unit in each area that is not turned on, the third unit corresponding to each area is determined, and the third unit is the heat pump unit with the least number of the first heat pump units within the radius.

4. The air conditioning system according to claim 3, characterized in that: The preset unit screening rules also include: For any round of heat pump unit determination process after the first round, when there are multiple heat pump units with the least number of the first heat pump units in any area among the multiple areas, the heat pump unit with the shortest operating time among the multiple heat pump units is used as the third unit.

5. The air conditioning system according to claim 4, characterized in that: When the heat pump unit that needs to be turned on runs for a first preset time, the controller is further configured to determine a second load demand of the air conditioning system; When the second load demand is greater than the first load demand, the controller is further configured to continue to start at least one heat pump unit in the multiple areas according to the preset unit screening rule; When the second load demand is less than the first load demand, the controller is further configured to shut down at least one heat pump unit with the longest running time among the heat pump units turned on in the multiple areas according to the running time of each unit among the heat pump units turned on in the multiple areas; The at least one heat pump unit is determined based on the difference between the total number of second units of heat pump units that need to be turned on to match the second load demand and the total number of the first units.

6. A control method for an air conditioning system, characterized in that: The method comprises: Determine the total number of first units of the heat pump units that need to be turned on to match the first load demand of the air-conditioning system; Determine the number of rounds of starting the heat pump units and the number of heat pump units to be started in each round according to the total number of the first units and the number of regions into which the plurality of heat pump units are divided; According to the location of the heat pump units in each area and the preset unit screening rules, the heat pump units that need to be turned on in each round are turned on.

7. The method according to claim 6, characterized in that When determining the heat pump units to be started in the first round, starting the heat pump units to be started in each round according to the positions of the heat pump units in each area and the preset unit screening rules includes: Determine a first unit dial code among the unit dial codes of the heat pump units that are not turned on in a first area of ​​the multiple areas, and use the heat pump unit corresponding to the first unit dial code as a host unit; The second unit corresponding to each area of ​​the plurality of areas except the first area is determined in sequence, wherein for any area of ​​the remaining areas, the selected second unit is the heat pump unit farthest from the main unit in any area.

8. The method according to claim 7, characterized in that When determining the heat pump units to be turned on in any round after the first round, turning on the heat pump units to be turned on in each round according to the positions of the heat pump units in each area and the preset unit screening rules includes: For each of the plurality of regions, taking each of the unactivated heat pump units in each region as the center of a circle, determining the number of activated first heat pump units within a radius of the region to which each heat pump unit belongs; According to the number of the first heat pump units within the radius of each heat pump unit in each area that is not turned on, the third unit corresponding to each area is determined, and the third unit is the heat pump unit with the least number of the first heat pump units within the radius.

9. The method according to claim 8, characterized in that The preset unit screening rules also include: For any round of heat pump unit determination process after the first round, when there are multiple heat pump units with the least number of the first heat pump units in any area among the multiple areas, the heat pump unit with the shortest operating time among the multiple heat pump units is used as the third unit.

10. The method according to any one of claims 6 to 9, characterized in that: The method further comprises: After the heat pump unit that needs to be turned on has been running for a first preset time, determining a second load demand of the air-conditioning system; When the second load demand is greater than the first load demand, continue to start at least one heat pump unit in the multiple areas according to the preset unit screening rule; When the second load demand is less than the first load demand, according to the running time of each of the turned-on heat pump units in the multiple areas, shut down at least one heat pump unit with the longest running time among the turned-on heat pump units in the multiple areas; The at least one heat pump unit is determined based on the difference between the total number of second units of heat pump units that need to be turned on to match the second load demand and the total number of the first units.

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