Heat pump outdoor unit group control method, control device and heat pump system

Abstract

This invention relates to the field of heat pump control, and provides a method, device, and system for controlling a group of outdoor units of a heat pump. The method includes: determining the starting position of the outdoor unit group based on the ambient wind direction; and determining a control strategy for the group based on the ambient wind direction and the starting position. The control strategy includes at least one of two adjacent outdoor units being in an on state and the other in a off state. This addresses the shortcomings of existing technologies where wind direction and the influence between outdoor units reduce the heating efficiency of the outdoor units. The heat pump outdoor unit group control method provided by this invention determines the starting position for the outdoor units to be turned on on the windward side by using the ambient wind direction. Since wind brings heat, using the windward side as the starting position improves heat exchange efficiency. Furthermore, when some outdoor units in the group are on, the alternating operation of adjacent outdoor units effectively avoids mutual interference between them, thereby improving the overall operating efficiency of the heat pump outdoor unit group.

Description

Technical Field

[0001] This invention relates to the field of heat pump control technology, and in particular to a heat pump outdoor unit group control method, control device and heat pump system. Background Technology

[0002] An air source heat pump is a device that uses low-temperature heat from the air to heat water. It boasts numerous advantages, including high safety, high energy efficiency, long lifespan, and no emissions of toxic or harmful gases. Also known as an air source water heater, it is also called an "air-source heat pump water heater," "air-cooled water heater," or simply "air-source water heater." An air source water heater absorbs low-temperature heat energy from the air, compresses it, and converts it into high-temperature heat energy to heat the water. This type of water heater (air source water heater) is highly energy efficient; to produce the same amount of hot water, the energy cost of an air source water heater is only 1 / 4 that of an electric water heater and 1 / 3 that of a gas water heater, and it is more energy efficient than an electric-assisted solar water heater.

[0003] In winter, air source heat pumps absorb heat from the air during heating, causing the air around the outdoor unit to cool down. If the surrounding air remains at a low temperature, the heating effect will be poor. Since wind carries high heat, heat pump outdoor units located downwind are also affected to some extent. If the air coming from upwind is cold, it will also lead to lower operating efficiency of the heat pump outdoor unit. Therefore, how to control the heat pump outdoor unit to ensure heating performance when heating demand is low is a crucial issue that the industry urgently needs to address. Summary of the Invention

[0004] This invention provides a heat pump outdoor unit group control method, control device, and heat pump system to solve the defects in the prior art where the influence of wind direction and the interaction between outdoor units reduces the heating efficiency of the outdoor unit. It realizes that when the outdoor unit group is partially open, the operating efficiency of the outdoor unit is improved by combining the wind direction and the influence between the outdoor units is reduced.

[0005] This invention provides a method for controlling a group of outdoor units of a heat pump, comprising:

[0006] Based on the ambient wind direction of the outdoor unit group, the starting position of the outdoor unit group is determined, and the starting position is the windward side of the outdoor unit group;

[0007] Based on the ambient wind direction and the starting position, a control strategy for the outdoor unit group is determined. This control strategy includes at least adjusting one of any two adjacent outdoor units in the group to be on and the other off. This utilizes the heat from the wind to improve heat exchange efficiency and avoids mutual interference between the outdoor units.

[0008] According to the heat pump outdoor unit group control method provided by the present invention, after the step of determining the control strategy for controlling the outdoor unit group, the method specifically includes:

[0009] Based on the preset outlet water temperature of the heat pump, the target number of outdoor units to be turned on in the outdoor unit group is determined, and the target number of outdoor units to be turned on is the number of outdoor units to be turned on in the outdoor unit group.

[0010] The control strategy is updated based on the target number of outdoor units to be activated and the total number of outdoor units in the outdoor unit group. This precisely controls the number of outdoor units to be activated, avoiding energy waste, and effectively plans the activation positions of outdoor units based on the target number, thereby improving operational efficiency.

[0011] According to the heat pump outdoor unit group control method provided by the present invention, the step of updating the control strategy specifically includes:

[0012] Based on the fact that the target number of outdoor units turned on is less than or equal to half the number of outdoor units in the outdoor unit group, the control strategy is generated according to the fact that between two adjacent outdoor units that are turned on, at least one outdoor unit is turned off.

[0013] If the number of target outdoor units to be turned on is greater than half the number of outdoor units in the outdoor unit group, the control strategy is updated based on the number of outdoor units that are all turned off. The outdoor unit turn-on control strategy is refined according to the different numbers of target outdoor units to be turned on.

[0014] According to the heat pump outdoor unit group control method provided by the present invention, the step of updating the control strategy based on all outdoor units that are in a shutdown state specifically includes:

[0015] Based on the direction perpendicular to the ambient wind direction, all outdoor units that are in the off state within the same direction are set as the first group;

[0016] Based on the ambient wind direction and the starting position, the outdoor units in each of the first groups are sequentially switched from the off state to the on state until the number of outdoor units in the group that are on is greater than or equal to the target number of outdoor units that are on. This ensures that the number of outdoor units on the near-wind side is greater than the number of outdoor units on the far-wind side, thereby improving the utilization rate of wind and heat.

[0017] According to the heat pump outdoor unit group control method provided by the present invention, the step of updating the control strategy specifically includes:

[0018] Based on the direction perpendicular to the ambient wind direction, all outdoor units in the same direction are set up as the second group;

[0019] Based on the fact that the number of outdoor units to be turned on is less than or equal to the number of the second group, each of the second groups will be turned on only one outdoor unit in sequence along the environmental wind direction;

[0020] Since the target number of outdoor units to be turned on is greater than the number of units in the second group, the number of outdoor units in the first second group that are turned on along the ambient wind direction is greater than the number of outdoor units in any other second group that are turned on. The outdoor unit turning sequence is optimized based on the number of units in the second group to improve heating efficiency.

[0021] According to the heat pump outdoor unit group control method provided by the present invention, the step of determining the control strategy for controlling the outdoor unit group further includes:

[0022] When the outdoor unit in the outdoor unit group switches from the off state to the on state, all the outdoor units in the direction perpendicular to the ambient wind direction are set as the third group;

[0023] Based on the environmental wind direction and the third group, determine the first outdoor unit to start at the starting position;

[0024] Based on the ambient wind direction and the first outdoor unit to be started, the outdoor units in each of the third groups are sequentially switched from the off state to the on state, with the outdoor units to be started being staggered with the outdoor units in the previous third group that are already in the on state. This staggered arrangement increases the distance between adjacent outdoor units and avoids mutual interference.

[0025] According to the heat pump outdoor unit group control method provided by the present invention, the steps based on the ambient wind direction and the first outdoor unit to be started specifically include:

[0026] Obtain a preset startup frequency and the instantaneous startup count of the first outdoor unit to start, wherein the preset startup frequency is the number of times each outdoor unit in the outdoor unit group starts within a unit time.

[0027] Based on the fact that the number of instantaneous starts exceeds the preset start frequency, the outdoor unit in the third group adjacent to the first outdoor unit to start is selected as the first outdoor unit to start, following the ambient wind direction. This avoids repeated start-stop cycles for a single outdoor unit, thereby improving its lifespan and ensuring heating efficiency.

[0028] According to the heat pump outdoor unit group control method provided by the present invention, the step of determining the control strategy for controlling the outdoor unit group further includes:

[0029] When an outdoor unit in the outdoor unit group switches from the on state to the off state, the shutdown sequence is the reverse of the sequence in which the outdoor unit group switches from the off state to the on state. This further optimizes the outdoor unit shutdown sequence.

[0030] The present invention also provides a heat pump outdoor unit group control device, comprising:

[0031] The location determination module is used to determine the starting position of the outdoor unit group based on the ambient wind direction of the environment where the outdoor unit group is located. The starting position is the windward side of the outdoor unit group.

[0032] A strategy generation module is used to determine a control strategy for the outdoor unit group based on the ambient wind direction and the starting position. The control strategy includes at least adjusting one of any two adjacent outdoor units in the group to be in an on state and the other to be in a off state. A position determination module and a strategy generation module are provided to enable outdoor unit control based on environmental risk and the control strategy, thereby improving heating efficiency and reducing mutual interference between outdoor units.

[0033] The heat pump outdoor unit group control device provided by the present invention further includes: an outlet water temperature confirmation module, which is used to determine the target number of outdoor units to be turned on in the outdoor unit group based on the preset outlet water temperature of the heat pump, wherein the target number of outdoor units to be turned on is the number of outdoor units to be turned on in the outdoor unit group.

[0034] The outlet water temperature confirmation module is connected to the strategy generation module. The strategy generation module updates the control strategy based on the outlet water temperature confirmed by the outlet water temperature confirmation module. By using the target number of outdoor units to be turned on through the outlet water temperature confirmation module, the required number of outdoor units can be controlled more accurately, avoiding energy waste.

[0035] This invention also provides a heat pump system, including the aforementioned heat pump outdoor unit group control method. The heat pump outdoor unit group control method improves the overall heating efficiency of the heat pump system.

[0036] The heat pump outdoor unit group control method provided by the present invention determines the starting position of the outdoor unit to be turned on on the windward side by using the ambient wind direction. The wind brings heat, and using the outdoor unit on the windward side as the starting position can improve the heat exchange efficiency. When some outdoor units of the outdoor unit group are turned on, the adjacent outdoor units are turned on at intervals to effectively avoid mutual interference between the outdoor units, thereby improving the overall operating efficiency of the heat pump outdoor unit group.

[0037] Furthermore, the heat pump outdoor unit group control device and heat pump system provided by the present invention also possess the various advantages described above due to the heat pump outdoor unit group control method described above. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This is a flowchart illustrating the heat pump outdoor unit group control method provided by the present invention;

[0040] Figure 2 This is a schematic diagram of the layout of the heat pump outdoor unit group provided by the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] The following is combined Figures 1 to 2 The embodiments of the present invention will be described below. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute a limitation thereof.

[0043] like Figure 1 As shown, the present invention provides a control method for a heat pump outdoor unit group, comprising:

[0044] S1: Based on the ambient wind direction of the outdoor unit group, determine the starting position of the outdoor unit group, which is the windward side of the outdoor unit group; specifically, obtain the current ambient wind direction of the external environment where the outdoor unit group is located, and take the outdoor unit corresponding to the windward side of the outdoor unit group as the starting position of the outdoor unit.

[0045] For example, the outdoor unit group is in the form of a matrix with rows and columns. The first row of outdoor units in the outdoor unit group is determined based on the environmental wind direction, which is the direction from the first row of outdoor units to the Nth row of outdoor units.

[0046] S2: Based on the ambient wind direction and starting position, determine the control strategy for the outdoor unit group. The control strategy includes at least adjusting one of any two adjacent outdoor units in the group to be on and the other to be off. In other words, starting with the outdoor unit at the initial position, the on / off state of other outdoor units is controlled in conjunction with the ambient wind direction. Based on the control strategy, the states of adjacent outdoor units are ensured to be different, reducing the impact of ambient wind on heating performance, avoiding interference between adjacent outdoor units, and improving the efficiency of the heat pump.

[0047] Of course, the control strategy also includes having at least two off outdoor units between adjacent off outdoor units that are in the on state. For example, controlling the outdoor units in rows 1 to 3 to be in the on state, with the off outdoor units spaced apart from each other, where M is less than or equal to N, and M and N are positive integers greater than or equal to 2, and N is the total number of rows in the outdoor unit group. In this embodiment, adjacent outdoor units include those adjacent in the same row, as well as those adjacent in the rows above and below.

[0048] In one embodiment of the present invention, after determining the control strategy for controlling the outdoor unit group in step S2, the specific steps include:

[0049] S21: Based on the preset outlet water temperature of the heat pump, determine the target number of outdoor units to be turned on in the outdoor unit group. The target number of outdoor units to be turned on is the number of outdoor units that need to be turned on in the outdoor unit group. The preset outlet water temperature is the temperature before entering the outdoor unit. The correspondence between the outlet water temperature and the number of outdoor units to be turned on is preset. The temperature sensor obtains the water temperature before entering the outdoor unit as the preset outlet water temperature, and then determines the target number of outdoor units to be turned on.

[0050] S22: Update the control strategy based on the target number of outdoor units to be activated and the total number of outdoor units in the outdoor unit group. Precisely control the number of outdoor units to be activated to avoid energy waste, and effectively plan the activation positions of outdoor units based on the target number of outdoor units to improve operating efficiency.

[0051] In addition, the water temperature of the outdoor unit is acquired in real time, and the target number of outdoor units to be turned on is determined based on the correspondence between the water temperature and the number of outdoor units turned on.

[0052] Furthermore, in another embodiment of the present invention, the step of updating the control strategy in step S22 specifically includes:

[0053] S221: A control strategy is generated based on the premise that the target number of outdoor units to be turned on is less than or equal to half the number of outdoor units in the outdoor unit group, ensuring that at least one outdoor unit is turned off between two adjacent outdoor units that are turned on. For example, along the direction of the ambient wind, the outdoor units are sequentially controlled from the initial position of the first row to the outdoor units in the Mth row, so that at least one outdoor unit is turned off between adjacent outdoor units that are turned on, i.e., the interval between adjacent outdoor units that are turned on, until the number of outdoor units that are turned on reaches the target number of outdoor units to be turned on. Each row of outdoor units can have one or more outdoor units turned on.

[0054] S222: Based on the fact that the number of target outdoor units being turned on is greater than half the number of outdoor units in the outdoor unit group, update the control policy according to all outdoor units that are in a turned-off state. Refine the outdoor unit turn-on control policy according to the different numbers of target outdoor units being turned on.

[0055] For example, when the number of outdoor units that are turned on is greater than half the number of outdoor units in the outdoor unit group, the system controls half of the outdoor units in the outdoor unit group to execute a control strategy between two adjacent outdoor units that are turned on, where at least one outdoor unit is turned off, to ensure that the corresponding outdoor unit executing the control strategy is turned on.

[0056] The remaining outdoor units are sequentially turned on along the ambient wind direction, from the first row to the Mth row, until the number of outdoor units in the on state equals the target number of outdoor units to be turned on; the remaining uncontrolled outdoor units are turned off.

[0057] Furthermore, in other embodiments of the present invention, the step of updating the control strategy based on all outdoor units in the off state in step S222 specifically includes:

[0058] S211: Based on the direction perpendicular to the ambient wind direction, set all outdoor units that are in the off state in the same direction as the first group; for example, set the outdoor units that are in the off state in the first row as the first group.

[0059] S212: Based on the ambient wind direction and starting position, sequentially switch the outdoor units in each first group from the off state to the on state until the number of outdoor units in the group that are on is greater than or equal to the target number of outdoor units that are on. This ensures that the number of outdoor units on the near-wind side is greater than the number of outdoor units on the far-wind side, thereby improving the utilization rate of wind and heat.

[0060] In other words, the outdoor unit groups are controlled in units of first groups. Multiple first groups are set up sequentially along the ambient wind direction. The number of outdoor units in the off state in each first group may be the same or different. The outdoor units in the first group that are in the off state are switched to the on state sequentially along the ambient wind direction until the number of outdoor units in the on state is greater than or equal to the target number of outdoor units to be turned on.

[0061] Furthermore, in some embodiments of the present invention, the step of updating the control strategy in step S22 specifically includes:

[0062] S231: Based on the direction perpendicular to the ambient wind direction, set all outdoor units in the same direction as the second group; that is, set all outdoor units in the first row as the second group.

[0063] S232: Based on the fact that the target number of outdoor units to be turned on is less than or equal to the number of the second group, only one outdoor unit in each second group will be turned on in sequence along the ambient wind direction; that is, if the number of rows is less than the target number of outdoor units to be turned on, in order to ensure the maximum spacing between outdoor units and the best heating efficiency, only one outdoor unit in each row will be turned on.

[0064] S233: Based on the premise that the target number of outdoor units to be turned on is greater than the number of units in the second group, the number of outdoor units in the first second group along the ambient wind direction that are turned on is greater than the number of outdoor units in any other second group that are turned on. In other words, the number of outdoor units turned on in the first row is greater than or equal to the number of outdoor units turned on in other rows. That is, the first row is the preferred option for turning on, and along the ambient wind direction, the second row, the third row, and so on, up to the Nth row, are turned on in sequence. Optimizing the outdoor unit turning-on sequence based on the number of units in the second group improves heating efficiency.

[0065] In other embodiments of the present invention, the step of determining the control strategy for controlling the outdoor unit group in step S2 further includes:

[0066] S23: When an outdoor unit in an outdoor unit group switches from the off state to the on state, set all outdoor units in the direction perpendicular to the ambient wind direction as the third group;

[0067] S24: Based on the ambient wind direction and the third group, determine the first outdoor unit to start from the starting position;

[0068] S25: Based on the ambient wind direction and the first outdoor unit to be started, sequentially switch the outdoor units to be started in each third group from the off state to the on state, with the outdoor units to be started interleaved with the outdoor units in the previous third group that are already in the on state. The interleaved arrangement increases the distance between adjacent outdoor units and avoids mutual interference.

[0069] For example, the rows for setting up external machine groups include A1, A2, A3, ... A a The columns of the external machine group include B1, B2, B3, ... B b , where a is a positive integer less than or equal to the number of rows, and b is a positive integer less than or equal to the number of columns;

[0070] When the number of rows in an external unit group is greater than the number of columns: control A1B1, A2B2, A3B3, ... A b B b A b-1 B b+1 ...A b+x B b-x The corresponding outdoor unit is in the on state, where x is a positive integer greater than or equal to 1, bx is less than or equal to 1, and b+x is less than or equal to a.

[0071] When the number of rows in the external unit group is less than the number of columns: control A1B1, A2B2, A3B3, ... A a B a A a+1 B a-1 ...A a-x B a+xThe corresponding first outdoor unit is in the on state, where a+x is less than or equal to b, and ax is less than or equal to 1.

[0072] In other embodiments of the present invention, the step S25, based on the ambient wind direction and the first outdoor unit started, specifically includes:

[0073] S251: Obtain the preset startup frequency and the instantaneous startup count of the first outdoor unit to start. The preset startup frequency is the number of times each outdoor unit in the outdoor unit group starts within a unit of time.

[0074] S252: Based on the fact that the number of immediate starts exceeds the preset start frequency, the outdoor unit in the third group adjacent to the first started outdoor unit is selected as the first outdoor unit to start, following the ambient wind direction. This avoids repeated start-stop of a single outdoor unit, thereby improving the service life of the outdoor unit and ensuring heating efficiency.

[0075] In addition, the steps based on the ambient wind direction and the first outdoor unit to be started also include obtaining the preset running time and the running time of the first outdoor unit to be started, and based on the fact that the number of instantaneous starts is greater than the preset start frequency or the preset running time is greater than the running time, the outdoor unit in the third group adjacent to the first outdoor unit to be started is selected as the first outdoor unit to be started along the ambient wind direction.

[0076] Of course, the running time and start-up frequency of each outdoor unit that is about to be turned on can be determined to improve the service life of the outdoor unit and ensure heat exchange efficiency.

[0077] In an optional embodiment of the present invention, the step of determining the control strategy for the outdoor unit group in step S2 further includes:

[0078] When switching outdoor units from the on state to the off state in an outdoor unit group, the shutdown sequence is the reverse of the sequence in which the outdoor units are switched from the off state to the on state. This further optimizes the outdoor unit shutdown sequence.

[0079] The present invention also provides a heat pump outdoor unit group control device, comprising:

[0080] The location determination module is used to determine the starting position of the outdoor unit group based on the ambient wind direction of the environment where the outdoor unit group is located. The starting position is the windward side of the outdoor unit group. The location determination module includes a wind direction sensor, which is installed on the outdoor unit.

[0081] The strategy generation module determines the control strategy for the outdoor unit group based on the ambient wind direction and starting location. The control strategy includes at least adjusting one of any two adjacent outdoor units in the group to be on and the other off. A location determination module and a strategy generation module are provided to enable outdoor unit control based on environmental risks and control strategies, thereby improving heating efficiency and reducing mutual interference between outdoor units.

[0082] In another optional embodiment of the present invention, the heat pump outdoor unit group control device further includes: an outlet water temperature confirmation module, which determines the target number of outdoor units to be turned on in the outdoor unit group based on the preset outlet water temperature of the heat pump; the target number of outdoor units to be turned on is the number of outdoor units to be turned on in the outdoor unit group; the outlet water temperature confirmation module is connected to a strategy generation module, which updates the control strategy based on the outlet water temperature of the outlet water temperature confirmation module. By using the target number of outdoor units to be turned on through the outlet water temperature confirmation module, the required number of outdoor units can be controlled more accurately, avoiding energy waste.

[0083] The outlet water temperature confirmation module includes a temperature sensor, which is located at the water inlet of the outdoor unit.

[0084] This invention also provides a heat pump system, including the heat pump outdoor unit group control method described in the above embodiments. The heat pump outdoor unit group control method improves the overall heating efficiency of the heat pump system.

[0085] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program that can be stored on a non-transitory computer-readable storage medium, wherein when the computer program is executed by a processor, the computer is able to execute the heat pump outdoor unit group control method provided by the above methods, the method comprising:

[0086] Based on the ambient wind direction of the outdoor unit group, determine the starting position of the outdoor unit group, which is the windward side of the outdoor unit group;

[0087] Based on the ambient wind direction and starting location, determine the control strategy for the outdoor unit group. The control strategy includes at least adjusting one of any two adjacent outdoor units in the outdoor unit group to be in the on state and the other outdoor unit to be in the off state.

[0088] For example, such as Figure 2 As shown, the outdoor unit groups are arranged in a matrix of rows and columns, and the outdoor unit groups are numbered.

[0089] Based on the wind direction sensor, when the heating demand is not high, only a portion of the outdoor unit group needs to be turned on. In the initial state, all the outdoor units of the outdoor unit group are in the off state. The preset outlet water temperature is obtained, and the target number of outdoor units to be turned on is determined. In this embodiment, the target number of outdoor units to be turned on is 6, and the total number of outdoor units in the outdoor unit group is 12, that is, the target number of outdoor units to be turned on is equal to half of the total number of outdoor units in the outdoor unit group.

[0090] Based on the ambient wind direction, the starting position is determined as outdoor unit 101. Outdoor units 202, 303, 402, 301, and 103 are then turned on sequentially and alternately along the ambient wind direction. This ensures that the number of outdoor units in the on state is equal to the target number of outdoor units to be turned on, and that adjacent on-state outdoor units are spaced apart from each other.

[0091] Furthermore, the hot water outlet temperature is measured again. If the outlet temperature changes, the outdoor units need to be turned on again. For example, if the target number of outdoor units to be turned on is 9, 3 more outdoor units need to be turned on.

[0092] Following the ambient wind direction, switch outdoor unit 102 from the off state to the on state, and then sequentially switch outdoor units 201 and 203 to the on state. Outdoor unit 102 forms one first group, and outdoor units 201 and 203 form another first group.

[0093] The device embodiments described above are merely illustrative. 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 modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0094] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for a group of outdoor units of a heat pump, characterized in that, include: Based on the ambient wind direction of the outdoor unit group, the starting position of the outdoor unit group is determined, and the starting position is the windward side of the outdoor unit group; Based on the ambient wind direction and the starting position, a control strategy for controlling the outdoor unit group is determined. The control strategy includes at least adjusting one of any two adjacent outdoor units in the outdoor unit group to be in the on state and the other outdoor unit to be in the off state. Following the step of determining the control strategy for controlling the outdoor unit group, the specific steps include: Based on the preset outlet water temperature of the heat pump, the target number of outdoor units to be turned on in the outdoor unit group is determined, and the target number of outdoor units to be turned on is the number of outdoor units to be turned on in the outdoor unit group. The control policy is updated based on the target number of outdoor units to be turned on and the total number of outdoor units in the outdoor unit group; The step of updating the control strategy specifically includes: Based on the fact that the target number of outdoor units turned on is less than or equal to half the number of outdoor units in the outdoor unit group, the control strategy is generated according to the fact that between two adjacent outdoor units that are turned on, at least one outdoor unit is turned off. Based on the fact that the number of target outdoor units turned on is greater than half of the number of outdoor units in the outdoor unit group, the control strategy is updated according to the outdoor units that are all turned off; The step of updating the control policy based on all outdoor units that are in a closed state specifically includes: Based on the direction perpendicular to the ambient wind direction, all outdoor units that are in the off state within the same direction are set as the first group; Based on the ambient wind direction and the starting position, the outdoor units in each of the first groups are sequentially switched from the off state to the on state until the number of outdoor units in the outdoor unit group that are in the on state is greater than or equal to the target number of outdoor units that are turned on.

2. The heat pump outdoor unit group control method according to claim 1, characterized in that, The step of updating the control strategy specifically includes: Based on the direction perpendicular to the ambient wind direction, all outdoor units in the same direction are set up as the second group; Based on the fact that the number of outdoor units to be turned on is less than or equal to the number of the second group, each of the second groups will be turned on only one outdoor unit in sequence along the environmental wind direction; Based on the fact that the number of outdoor units that are turned on is greater than the number of units in the second group, the number of outdoor units in the first second group that are turned on along the environmental wind direction is greater than the number of outdoor units in any other second group that are turned on.

3. The heat pump outdoor unit group control method according to claim 1 or 2, characterized in that, The step of determining the control strategy for controlling the outdoor unit group further includes: When the outdoor unit in the outdoor unit group switches from the off state to the on state, all the outdoor units in the direction perpendicular to the ambient wind direction are set as the third group; Based on the environmental wind direction and the third group, determine the first outdoor unit to start at the starting position; Based on the ambient wind direction and the first outdoor unit to be started, each outdoor unit in the third group to be started is switched from the off state to the start state in sequence, with the outdoor units to be started and the outdoor units in the previous third group that are in the start state arranged alternately.

4. The heat pump outdoor unit group control method according to claim 3, characterized in that, Based on the aforementioned wind direction and the steps for starting the first outdoor unit, the specific steps include: Obtain a preset startup frequency and the instantaneous startup count of the first outdoor unit to start, wherein the preset startup frequency is the number of times each outdoor unit in the outdoor unit group starts within a unit of time; Based on the fact that the number of instant starts is greater than the preset start frequency, the outdoor unit in the third group adjacent to the first outdoor unit to be started is selected as the first outdoor unit to be started, according to the ambient wind direction.

5. The heat pump outdoor unit group control method according to claim 3, characterized in that, The step of determining the control strategy for controlling the outdoor unit group further includes: When an outdoor unit in the outdoor unit group switches from the on state to the off state, the shutdown sequence is the reverse of the sequence in which the outdoor unit group switches from the off state to the on state.

6. A control device for a heat pump outdoor unit group, characterized in that, include: The location determination module is used to determine the starting position of the outdoor unit group based on the ambient wind direction of the environment where the outdoor unit group is located. The starting position is the windward side of the outdoor unit group. The strategy generation module is used to determine a control strategy for controlling the outdoor unit group based on the environmental wind direction and the starting position. The control strategy includes at least adjusting one of any two adjacent outdoor units in the outdoor unit group to be in the on state and the other outdoor unit to be in the off state. The outlet water temperature confirmation module is used to determine the target number of outdoor units to be turned on in the outdoor unit group based on the preset outlet water temperature of the heat pump. The target number of outdoor units to be turned on is the number of outdoor units to be turned on in the outdoor unit group. The outlet water temperature confirmation module is connected to the strategy generation module, and the strategy generation module updates the control strategy based on the outlet water temperature of the outlet water temperature confirmation module. The strategy generation module updates the control strategy, specifically including: Based on the fact that the target number of outdoor units turned on is less than or equal to half the number of outdoor units in the outdoor unit group, the control strategy is generated according to the fact that between two adjacent outdoor units that are turned on, at least one outdoor unit is turned off. Based on the fact that the number of target outdoor units turned on is greater than half of the number of outdoor units in the outdoor unit group, the control strategy is updated according to the outdoor units that are all turned off; The strategy generation module updates the control strategy based on all outdoor units that are in a closed state, specifically including: Based on the direction perpendicular to the ambient wind direction, all outdoor units that are in the off state within the same direction are set as the first group; Based on the ambient wind direction and the starting position, the outdoor units in each of the first groups are sequentially switched from the off state to the on state until the number of outdoor units in the outdoor unit group that are in the on state is greater than or equal to the target number of outdoor units that are turned on.

7. A heat pump system, characterized in that, The heat pump outdoor unit group control method includes any one of claims 1 to 5 above.

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