Control methods, control devices, and combined heat pump units

Abstract

This application discloses a control method, control device, and combined heat pump unit, belonging to the field of heat pump technology. The control method includes: upon receiving a start-up command, determining the current electricity price type, including peak price, normal price, and off-peak price; based on the current electricity price type, determining m heat pumps to start from a gas-fired heat pump and b electric heat pumps, with the initial output power of the m heat pumps determined based on the initial output level of the combined heat pump unit; after starting the m heat pumps for a first target duration, updating the output level of the combined heat pump unit based on the outlet water temperature and set temperature; and adjusting the output power of the currently started heat pump or adjusting the number or type of started heat pumps based on the updated output level. Through the above-mentioned dual-drive source combined energy regulation logic design, the overall system operating efficiency is improved, operating costs are reduced, and product costs are decreased.

Description

Technical Field

[0001] This application belongs to the field of heat pump technology, and in particular relates to a control method, control device and combined heat pump unit for a combined heat pump unit. Background Technology

[0002] Most air conditioners are currently electric air conditioners that consume electricity, while a small number are gas-powered air conditioners that consume natural gas. Both types of air conditioners have their advantages and disadvantages, but consumers usually choose based on the cost of use.

[0003] In my country, both residential and industrial electricity prices are tiered based on time of day, with peak, off-peak, and valley pricing. The price differences between different time periods are significant, with peak prices sometimes exceeding five times the valley price. While gas prices are not tiered by time of day, they are adjusted 1-2 times per year. Therefore, even for the same customer, the cost of using the same electric or gas-fired air conditioner can vary considerably depending on the time of day and the year.

[0004] In related technologies, to solve the above problems, some air conditioners adopt a dual-drive source solution, using both a motor and an engine to drive the compressor, selecting one drive source depending on the situation. However, the inventors found that using this solution significantly increases the product cost, makes the structure more complex, and only one drive source can operate at a time, thus reducing the maximum output power. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a control method, control device, and combined heat pump unit for a heat pump unit, which improves the overall system operating efficiency, reduces operating costs, and decreases product costs.

[0006] In a first aspect, this application provides a control method for a heat pump unit, wherein the combined heat pump unit includes a gas heat pump and b electric heat pumps connected in parallel, and the control method includes:

[0007] Upon receiving the power-on command, determine the current electricity price type, which includes peak electricity price, normal electricity price, and off-peak electricity price.

[0008] Based on the current electricity price type, m heat pumps are selected from a gas heat pumps and b electric heat pumps to start, and the initial output power of the m heat pumps is determined based on the initial output level of the combined heat pump unit.

[0009] After the first target duration of starting the m heat pumps, the output level of the combined heat pump unit is updated based on the outlet water temperature and the set temperature of the combined heat pump unit.

[0010] Based on the updated output level, adjust the output power of the currently running heat pump or adjust the number or type of running heat pumps.

[0011] According to the control method of the heat pump unit of this application, through the above-mentioned energy regulation logic design of dual drive source combination, on the one hand, the module priority is set according to the electricity price and the output threshold is designed according to the characteristics of the unit, thereby improving the overall operating efficiency of the system and reducing the operating cost; on the other hand, the overall structure is lightweight and the layout is simple, thereby reducing the product cost.

[0012] According to one embodiment of this application, determining the start-up of m heat pumps from a gas-fired heat pump and b electric heat pumps based on the current electricity price type includes:

[0013] Given that the current electricity price type is peak electricity price, select m gas heat pumps from the a gas heat pumps to start;

[0014] Under the current electricity price type of normal electricity price, 0.5m gas heat pumps are selected from the a gas heat pumps to be started, and 0.5m electric heat pumps are selected from the b electric heat pumps to be started;

[0015] Given that the current electricity price type is off-peak electricity price, select m electric heat pumps from the b electric heat pumps to start.

[0016] According to one embodiment of this application, updating the output level of the combined heat pump unit based on the outlet water temperature and the set temperature includes:

[0017] When t1 < ΔT, the number of output gears increases by the number of gears for each first target duration.

[0018] If t2≤ΔT≤t1, maintain the current output level;

[0019] When t3≤ΔT<t2, the output level decreases by the second target level for every second target duration;

[0020] When ΔT < t3, the combined heat pump unit is shut down; wherein

[0021] t1 is the first target value, t2 is the second target value, and t3 is the third target value; in cooling mode, ΔT = TL - TS; in heating mode, ΔT = TS - TL; TL is the outlet water temperature, and TS is the set temperature.

[0022] According to one embodiment of this application, the first target duration, the first target number of segments, the second target duration, and the second target number of segments are determined based on the magnitude of ΔT.

[0023] According to one embodiment of this application, when t1 < ΔT, ΔT is negatively correlated with the first target duration and positively correlated with the first target number of stages; when t3 ≤ ΔT < t2, ΔT is positively correlated with the second target duration and negatively correlated with the second target number of stages.

[0024] According to one embodiment of this application, adjusting the output power of the currently activated heat pump or adjusting the number or type of activated heat pumps based on the updated output level includes:

[0025] When the updated output level is higher...

[0026] If the current electricity price is either peak or off-peak, the additional output power will be evenly distributed to the currently activated heat pumps. If the output power of any currently activated heat pump reaches the first output power, another heat pump of the same type will be activated, and the remaining required power will be distributed to the newly activated heat pump. If the output power of all currently activated heat pumps reaches the first output power, the additional power demand will be evenly distributed to all currently activated heat pumps. If the output power of all currently activated heat pumps reaches the second output power, n heat pumps of another type will be activated, and the additional power demand will be evenly distributed to n heat pumps of another type. If all heat pumps are activated and their output power reaches the second output power, the additional power demand will be evenly distributed to a gas heat pumps and b electric heat pumps.

[0027] If the current electricity price is the normal price, the additional output power will be evenly distributed to the currently started heat pumps; if the output power of any currently started heat pump reaches the first output power, another heat pump will be started, and the remaining required power will be distributed to the newly started heat pump; if all heat pumps are started and their output power reaches the first output power, the additional power demand will be evenly distributed to a gas heat pump and b electric heat pumps.

[0028] According to one embodiment of this application, adjusting the output power of the currently activated heat pump or adjusting the number or type of activated heat pumps based on the updated output level further includes:

[0029] When the updated output level is lower.

[0030] If the current electricity price is either peak or off-peak, and all heat pumps are running with their output power exceeding the second output power, the reduced power demand is evenly distributed among gas heat pump 'a' and electric heat pump 'b' until all heat pumps reach the second output power. Then, the reduced power demand is evenly distributed among heat pumps not corresponding to the current electricity price type until all heat pumps not corresponding to the current electricity price type reach the first output power. Next, heat pumps not corresponding to the current electricity price type are shut down one by one until all heat pumps not corresponding to the current electricity price type are shut down. Then, the reduced power demand is evenly distributed among heat pumps corresponding to the current electricity price type until all heat pumps corresponding to the current electricity price type reach the first output power. Finally, heat pumps corresponding to the current electricity price type are shut down one by one until all heat pumps corresponding to the current electricity price type are shut down.

[0031] Under the current electricity price type of normal electricity price, the reduced power demand will be evenly distributed to all started heat pumps until the output power of all started heat pumps is the first output power; then start-up heat pumps will be shut down one by one in the order of startup until all heat pumps are shut down.

[0032] According to one embodiment of this application, the combined heat pump unit has a total of n output levels, and the difference Q0 between two adjacent levels is:

[0033] Q0 = Q s / n;

[0034] in, Qgm i Let Qgm be the maximum output power of the i-th gas heat pump. j This represents the maximum output power of the j-th electric heat pump.

[0035] Secondly, this application provides a control device for a combined heat pump unit, the device comprising:

[0036] The first processing module is used to determine the current electricity price type when a power-on command is received. The electricity price type includes peak electricity price, normal electricity price and off-peak electricity price.

[0037] The first control module is used to determine the start-up of m heat pumps from a gas heat pumps and b electric heat pumps based on the current electricity price type, and the initial output power of the m heat pumps is determined based on the initial output level of the combined heat pump unit.

[0038] The second processing module is used to update the output level of the combined heat pump unit based on the outlet water temperature and the set temperature of the combined heat pump unit after the first target duration of the start-up of the m heat pumps.

[0039] The second control module is used to adjust the output power of the currently running heat pump or adjust the number or type of running heat pumps based on the updated output level.

[0040] According to the control device of the combined heat pump unit of this application, through the above-mentioned dual-drive source combined energy regulation logic design, on the one hand, the module priority is set according to the electricity price and the output threshold is designed according to the characteristics of the unit, thereby improving the overall system operating efficiency and reducing operating costs; on the other hand, a central controller controls all heat pumps at the same time, and the gas heat pump and electric heat pump use existing products without special development, making the overall structure lightweight and the layout simple, thereby reducing product costs.

[0041] According to one embodiment of this application, the first control module can also be used for:

[0042] Given that the current electricity price type is peak electricity price, select m gas heat pumps from the a gas heat pumps to start;

[0043] Under the current electricity price type of normal electricity price, 0.5m gas heat pumps are selected from the a gas heat pumps to be started, and 0.5m electric heat pumps are selected from the b electric heat pumps to be started;

[0044] Given that the current electricity price type is off-peak electricity price, select m electric heat pumps from the b electric heat pumps to start.

[0045] According to one embodiment of this application, the second processing module can also be used for:

[0046] When t1 < ΔT, the number of output gears increases by the number of gears for each first target duration.

[0047] If t2≤ΔT≤t1, maintain the current output level;

[0048] When t3≤ΔT<t2, the output level decreases by the second target level for every second target duration;

[0049] When ΔT < t3, the combined heat pump unit is shut down; wherein

[0050] t1 is the first target value, t2 is the second target value, and t3 is the third target value; in cooling mode, ΔT = TL - TS; in heating mode, ΔT = TS - TL; TL is the outlet water temperature, and TS is the set temperature.

[0051] According to one embodiment of this application, the first target duration, the first target number of segments, the second target duration, and the second target number of segments are determined based on the magnitude of ΔT.

[0052] According to one embodiment of this application, when t1 < ΔT, ΔT is negatively correlated with the first target duration and positively correlated with the first target number of stages; when t3 ≤ ΔT < t2, ΔT is positively correlated with the second target duration and negatively correlated with the second target number of stages.

[0053] According to one embodiment of this application, the second control module can also be used for:

[0054] When the updated output level is higher...

[0055] If the current electricity price is either peak or off-peak, the additional output power will be evenly distributed to the currently activated heat pumps. If the output power of any currently activated heat pump reaches the first output power, another heat pump of the same type will be activated, and the remaining required power will be distributed to the newly activated heat pump. If the output power of all currently activated heat pumps reaches the first output power, the additional power demand will be evenly distributed to all currently activated heat pumps. If the output power of all currently activated heat pumps reaches the second output power, n heat pumps of another type will be activated, and the additional power demand will be evenly distributed to n heat pumps of another type. If all heat pumps are activated and their output power reaches the second output power, the additional power demand will be evenly distributed to a gas heat pumps and b electric heat pumps.

[0056] If the current electricity price is the normal price, the additional output power will be evenly distributed to the currently started heat pumps; if the output power of any currently started heat pump reaches the first output power, another heat pump will be started, and the remaining required power will be distributed to the newly started heat pump; if all heat pumps are started and their output power reaches the first output power, the additional power demand will be evenly distributed to a gas heat pump and b electric heat pumps.

[0057] According to one embodiment of this application, the second control module can also be used for:

[0058] When the updated output level is lower.

[0059] If the current electricity price is either peak or off-peak, and all heat pumps are running with their output power exceeding the second output power, the reduced power demand is evenly distributed among gas heat pump 'a' and electric heat pump 'b' until all heat pumps reach the second output power. Then, the reduced power demand is evenly distributed among heat pumps not corresponding to the current electricity price type until all heat pumps not corresponding to the current electricity price type reach the first output power. Next, heat pumps not corresponding to the current electricity price type are shut down one by one until all heat pumps not corresponding to the current electricity price type are shut down. Then, the reduced power demand is evenly distributed among heat pumps corresponding to the current electricity price type until all heat pumps corresponding to the current electricity price type reach the first output power. Finally, heat pumps corresponding to the current electricity price type are shut down one by one until all heat pumps corresponding to the current electricity price type are shut down.

[0060] Under the current electricity price type of normal electricity price, the reduced power demand will be evenly distributed to all started heat pumps until the output power of all started heat pumps is the first output power; then start-up heat pumps will be shut down one by one in the order of startup until all heat pumps are shut down.

[0061] According to one embodiment of this application, the combined heat pump unit has a total of n output levels, and the difference Q0 between two adjacent levels is:

[0062] Q0 = Q s / n;

[0063] in, Qgm i Let Qgm be the maximum output power of the i-th gas heat pump. j This represents the maximum output power of the j-th electric heat pump.

[0064] Thirdly, this application provides a combined heat pump unit, which includes:

[0065] Control device for gas heat pumps, electric heat pumps, and any of the combined heat pump units described above.

[0066] According to the combined heat pump unit of this application, by setting the control device of the combined heat pump unit, on the one hand, it ensures that the heating and cooling effects are both good, while improving the energy utilization efficiency, thereby improving the energy efficiency and convenience of the entire unit; on the other hand, it is not affected by the outdoor temperature in the cooling or heating state, which greatly increases the maximum output power of the unit while reducing the operating cost of the entire unit.

[0067] Fourthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the control method for the combined heat pump unit as described in the first aspect above.

[0068] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the control method of the combined heat pump unit as described in the first aspect.

[0069] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed by a processor, implements the control method for the combined heat pump unit as described in the first aspect above.

[0070] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0071] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0072] Figure 1 This is one of the flowcharts illustrating the control method for a combined heat pump unit provided in the embodiments of this application;

[0073] Figure 2 This is a schematic diagram of the combined heat pump unit provided in the embodiments of this application;

[0074] Figure 3 This is a schematic diagram of the control device for the combined heat pump unit provided in the embodiments of this application.

[0075] Figure label:

[0076] Combined heat pump unit 200, main return water pipe 210, main outlet water pipe 220, outlet water temperature sensor 230, central controller 240, communication line 250. Detailed Implementation

[0077] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0078] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0079] The control method, control device 300, combined heat pump unit 200, and readable storage medium of the combined heat pump unit provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0080] The control method for the combined heat pump unit can be applied to the terminal, and can be executed by the hardware or software in the terminal.

[0081] The terminal includes, but is not limited to, portable communication devices such as mobile phones or tablets with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads). It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but rather a desktop computer with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads).

[0082] The following embodiments describe a terminal including a display and a touch-sensitive surface. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

[0083] The control method for a combined heat pump unit provided in this application embodiment can be executed by an electronic device or a functional module or entity in an electronic device that can implement the control method for the combined heat pump unit. The electronic devices mentioned in this application embodiment include, but are not limited to, mobile phones, tablets, computers, cameras, and wearable devices. The control method for a combined heat pump unit provided in this application embodiment will be described below using an electronic device as the execution subject as an example.

[0084] This application discloses a control method for a combined heat pump unit.

[0085] like Figures 1-2 As shown, the combined heat pump unit 200 includes a gas heat pump (GHP) and b electric heat pumps (EHP) connected in parallel. The control method of the combined heat pump unit includes steps 110, 120, 130 and 140.

[0086] Step 110: Upon receiving the power-on command, determine the current electricity price type, which includes peak electricity price, normal electricity price, and off-peak electricity price.

[0087] It should be noted that electricity prices are not the same at all times. Prices may be moderately increased during peak hours and moderately decreased during off-peak hours. Peak prices can be the highest prices in a cycle, normal prices can be the most stable prices in a cycle, and off-peak prices can be the lowest prices in a cycle.

[0088] Step 120: Based on the current electricity price type, determine m heat pumps to start from a gas-fired heat pump (GHP) and b electric heat pumps (EHP), and the initial output power of m heat pumps is determined based on the initial output level of the combined heat pump unit 200.

[0089] Wherein, the value of 'a' can be 1≤a≤8. For example, in some embodiments, the combined heat pump unit 200 is equipped with 8 gas heat pumps (GHP); the value of 'b' can be 1≤b≤8. For example, in some embodiments, the combined heat pump unit 200 is equipped with 8 electric heat pumps (EHP).

[0090] like Figure 2 As shown, the combined heat pump unit 200 may also include a central controller 240 and a communication line 250. A gas heat pump (GHP) and a power heat pump (EHP) can be electrically connected to the central controller 240 via the communication line 250. The central controller 240 can control the start-up or shutdown of the gas heat pump (GHP) and the power heat pump (EHP). Furthermore, one central controller 240 can control all heat pumps simultaneously. Both the gas heat pump (GHP) and the power heat pump (EHP) can use existing products without the need for special development.

[0091] It should be noted that the initial output power of m heat pumps can be the power initially allocated to m heat pumps. The energy regulation of the combined heat pump unit 200 can be divided into multiple levels. The maximum output power of the combined heat pump unit 200 can be evenly distributed to each level, or the maximum output power of the combined heat pump unit 200 can be dissimilarly distributed to each level. The output power corresponding to the initial output level of the combined heat pump unit 200 can be equal to the initial output power of m heat pumps. At the same time, this initial output power can be evenly distributed among m heat pumps, or the initial output power can be dissimilarly distributed among m heat pumps.

[0092] The initial output gear can be set to gear 1 or higher. For example, in some embodiments, the initial output gear can be set to gear 1.

[0093] Step 130: After the first target duration of starting m heat pumps, update the output level of the combined heat pump unit 200 based on the outlet water temperature and set temperature of the combined heat pump unit 200.

[0094] The duration of the first target can be 3-5 minutes, for example, in some embodiments, the duration of the first target is 4 minutes.

[0095] like Figure 2 As shown, the combined heat pump unit 200 may also include a main return water pipe 210, a main outlet water pipe 220, and an outlet water temperature sensor 230. The return water pipes of a gas heat pump (GHP) and b electric heat pump (EHP) can be connected to the main return water pipe 210, and the outlet water pipes of a gas heat pump (GHP) and b electric heat pump (EHP) can be connected to the main outlet water pipe 220.

[0096] The outlet water temperature can be the water temperature at the outlet of the main outlet pipe 220. The set temperature can be the water temperature set by the user. The outlet water temperature sensor 230 can be used to detect the outlet water temperature. The outlet water temperature sensor 230 can be installed on the main outlet pipe 220 and can be connected to the central controller 240. The outlet water temperature sensor 230 can upload the detected outlet water temperature to the central controller 240.

[0097] In this embodiment, in cooling mode, when the outlet water temperature is much higher than the set temperature, the output level of the combined heat pump unit 200 can be updated to a higher level; when the outlet water temperature is much lower than the set temperature, the output level of the combined heat pump unit 200 can be updated to a lower level. In heating mode, when the outlet water temperature is much lower than the set temperature, the output level of the combined heat pump unit 200 can be updated to a higher level; when the outlet water temperature is much higher than the set temperature, the output level of the combined heat pump unit 200 can be updated to a lower level.

[0098] Step 140: Based on the updated output level, adjust the output power of the currently running heat pump or adjust the number or type of running heat pumps.

[0099] Understandably, after the combined heat pump unit 200 has been started and operating for a period of time, as the outlet water temperature of the combined heat pump unit 200 changes, the output level of the combined heat pump unit 200 is also constantly updated. Each time the output level of the combined heat pump unit 200 is updated, the output power of the currently started heat pump can be adjusted. Based on the proportion of the output power of the currently started heat pump, the number or type of the currently started heat pump can be adjusted.

[0100] In actual operation, after the combined heat pump unit 200 receives the start-up command and starts the cooling or heating mode, the central controller 240 can determine the electricity price type at that time. Based on the determined electricity price type, it can determine the start of m heat pumps from a gas heat pump (GHP) and b electric heat pumps (EHP). At the same time, the output power of m heat pumps can be equal to the output power corresponding to the initial output level. After the combined heat pump unit 200 starts for 4 minutes, it can continuously update the output level based on the outlet water temperature and the set temperature, and adjust the number or type of the currently started heat pumps accordingly based on the changing output level.

[0101] The control method for the combined heat pump unit provided in this application embodiment, through the above-mentioned dual-drive source combined energy regulation logic design, on the one hand, sets the module priority according to the electricity price and designs the output threshold according to the characteristics of the unit, thereby improving the overall system operating efficiency and reducing operating costs; on the other hand, (GHP)(EHP) makes the overall structure lightweight and the layout simple, thereby reducing product costs.

[0102] In some embodiments, step 120, determining the start-up of m heat pumps from a gas-fired heat pump (GHP) and b electric heat pumps (EHP) based on the current electricity price type, may include:

[0103] Given that the current electricity price type is peak electricity price, select m gas heat pumps (GHP) from a to start;

[0104] Under the current electricity price type of normal electricity price, select 0.5m gas heat pumps (GHP) from a gas heat pump (GHP) to start, and select 0.5m electric heat pumps (EHP) from b electric heat pumps (EHP) to start.

[0105] Given that the current electricity price type is off-peak electricity price, select m electric heat pumps (EHP) from b EHPs to start.

[0106] Wherein, the value of 'a' can be 1≤a≤8. For example, in some embodiments, the combined heat pump unit 200 is equipped with 8 gas heat pumps (GHP); the value of 'b' can be 1≤b≤8. For example, in some embodiments, the combined heat pump unit 200 is equipped with 8 electric heat pumps (EHP); 'm' can be 2 or more, and 'm' is an even number. For example, in some embodiments, 2 heat pumps are initially started.

[0107] In this embodiment, the combined heat pump unit 200 may include a gas heat pumps (GHPs) and b electric heat pumps (EHPs). When the current electricity price type is peak electricity price, the gas heat pump (GHP) is the priority module at this time. m units can be selected from the a gas heat pumps (GHPs) to start, and the output power of any one of the m started gas heat pumps (GHPs) is half of the initial output power. When the current electricity price type is normal electricity price, there is no priority module at this time. 0.5m units can be selected from the a gas heat pumps (GHPs) to start, and at the same time, 0.5m units can be selected from the b electric heat pumps (EHPs) to start. The output power of any one of the 0.5m started gas heat pumps (GHPs) and 0.5m electric heat pumps (EHPs) is half of the initial output power. When the current electricity price type is valley electricity price, the electric heat pump (EHP) is the priority module at this time. m units can be selected from the b electric heat pumps (EHPs) to start, and the output power of any one of the m started electric heat pumps (EHPs) is half of the initial output power.

[0108] The control method of the combined heat pump unit provided by the embodiments of the present application, through the design of the above-mentioned priority start module, confirms the priority module according to the electricity price type, and cooperates with the central controller 240 to allocate the output power, which can minimize the expenditure of the heat pump cost, thereby improving the economy and practicability of the combined heat pump unit 200.

[0109] In some embodiments, step 130, updating the output gear of the combined heat pump unit 200 based on the outlet water temperature and the set temperature of the combined heat pump unit 200 may include:

[0110] When t1 < ΔT, the output gear increases by the first target number of gears every first target duration;

[0111] When t2 ≤ ΔT ≤ t1, keep the current output gear;

[0112] When t3 ≤ ΔT < t2, the output gear decreases by the second target number of gears every second target duration;

[0113] When ΔT < t3, control the combined heat pump unit 200 to stop; where

[0114] t1 is the first target value, t2 is the second target value, and t3 is the third target value; in the cooling mode, ΔT = TL - TS; in the heating mode, ΔT = TS - TL; TL is the outlet water temperature, and TS is the set temperature.

[0115] The first target value t1 can be in the range of 0.8℃≤t1≤1.2℃. For example, in some embodiments, the first target value t1 is set to 1℃. The second target value t2 can be in the range of -0.8℃≤t2≤-0.4℃. For example, in some embodiments, the second target value t2 is set to -0.5℃. The third target value t3 can be in the range of -2.4℃≤t2≤-1.8℃. For example, in some embodiments, the third target value t3 is set to -2℃.

[0116] The following explanations use t1 as 1℃, t2 as -0.5℃, and t3 as -2℃ as examples.

[0117] It should be noted that when the central controller 240 is set to cooling mode, the user-set temperature is relatively low. At this time, because the outdoor temperature is high, the tap water temperature is also high, resulting in the initial outlet water temperature TL being slightly higher than the set temperature TS. When the central controller 240 is set to heating mode, the user-set temperature is relatively high. At this time, because the outdoor temperature is low, the tap water temperature is also high. Additionally, due to insufficient heat load or water pressure, the initial outlet water temperature TL is slightly lower than the set temperature TS.

[0118] Therefore, in cooling mode, based on ΔT = TL - TS, ΔT is initially positive. As the combined heat pump unit 200 continues to operate, the outlet water temperature TL continuously decreases. During this process, the output setting of the combined heat pump unit 200 will also be updated accordingly until ΔT < -2℃, at which point the combined heat pump unit 200 stops. In heating mode, based on ΔT = TS - TL, ΔT is initially positive. As the combined heat pump unit 200 continues to operate, the outlet water temperature TL continuously increases. During this process, the output setting of the combined heat pump unit 200 will also be updated accordingly until ΔT < -2℃, at which point the combined heat pump unit 200 stops.

[0119] The control method for the combined heat pump unit provided in this application embodiment, through the design of the above-mentioned output gear adjustment mechanism, updates and adjusts the output gear of the combined heat pump unit 200 in different modes in sections according to the change in the difference between the outlet water temperature TL and the set temperature TS, thereby avoiding an excessively large difference between the outlet water temperature TL and the set temperature TS in both cooling and heating modes, thus improving the comfort and experience of the entire unit.

[0120] In some embodiments, the first target duration, the first target number of gears, the second target duration, and the second target number of gears can be determined based on the magnitude of ΔT.

[0121] In actual operation, in the refrigeration mode, when t1 < 1°C, the refrigerating capacity is insufficient at this time. Based on the magnitude of ΔT at this time, the values of the first target duration and the first target number of gears can be set. The output power is increased by increasing the first target number of gears for each output gear at the first target duration; when -2°C ≤ ΔT < -0.5°C, the refrigerating capacity is sufficient at this time. Based on the magnitude of ΔT at this time, the values of the second target duration and the second target number of gears can be set. The output power is reduced by increasing the second target number of gears for each output gear at the second target duration.

[0122] In the heating mode, when 1°C < ΔT, the heating capacity is insufficient at this time. Based on the magnitude of ΔT at this time, the values of the first target duration and the first target number of gears can be set. The output power is increased by increasing the first target number of gears for each output gear at the first target duration; when -2°C ≤ ΔT < -0.5°C, the heating capacity is sufficient at this time. Based on the magnitude of ΔT at this time, the values of the second target duration and the second target number of gears can be set. The output power is reduced by increasing the second target number of gears for each output gear at the second target duration.

[0123] The control method of the combined heat pump unit provided by the embodiment of the present application realizes the intelligent temperature control function in the refrigeration mode and the heating mode through the setting of the above confirmation methods for the first target duration, the first target number of gears, the second target duration, and the second target number of gears, ensuring that the difference between the outlet water temperature TL and the set temperature TS is maintained within a controllable range, thereby improving the stability of the entire unit.

[0124] In some embodiments, when t1 < ΔT, ΔT can be negatively correlated with the first target duration, and ΔT can be positively correlated with the first target number of gears; when t3 ≤ ΔT < t2, ΔT can be positively correlated with the second target duration, and ΔT can be negatively correlated with the second target number of gears.

[0125] In other words, when 1°C < ΔT, the larger ΔT is, the smaller the first target duration is, and the larger the first target number of gears is; the smaller ΔT is, the larger the first target duration is, and the smaller the first target number of gears is. For example, in some embodiments, when 1°C < △T ≤ 3°C, the first target duration is 240 s, and the first target number of gears is 1 gear, that is, the output increases by one gear every 240 s; when 3°C < △T ≤ 5°C, the first target duration is 180 s, and the first target number of gears is 2 gears, that is, the output increases by two gears every 180 s; when △T > 5°C, the first target duration is 120 s, and the first target number of gears is 2 gears, that is, the output increases by two gears every 120 s.

[0126] When -2℃≤ΔT<-0.5℃, the larger ΔT is, the longer the duration of the second target and the smaller the number of gears for the second target; conversely, the smaller ΔT is, the shorter the duration of the second target and the larger the number of gears for the second target. For example, in some embodiments, when -1℃<ΔT<-0.5℃, the duration of the second target is 180s and the number of gears for the second target is 1, meaning the output decreases by 1 gear every 180s; when -2℃≤ΔT≤-1℃, the duration of the second target is 120s and the number of gears for the second target is 2, meaning the output decreases by 2 gears every 120s.

[0127] The control method for the combined heat pump unit provided in this application embodiment, through the numerical settings of the first target duration, the first target level, the second target duration, and the second target level, enables the central controller 240 to adjust the target level and distribute energy according to the numerical change of ΔT, thereby optimizing the unit's adjustment performance and operating efficiency, and thus improving the intelligence of the entire unit.

[0128] In some embodiments, step 140, adjusting the output power of the currently activated heat pump or adjusting the number or type of activated heat pumps based on the updated output level, may include:

[0129] When the updated output level is higher...

[0130] If the current electricity price is either peak or off-peak, the additional output power will be evenly distributed to the currently activated heat pumps. If the output power of any currently activated heat pump reaches the first output power, another heat pump of the same type will be activated, and the remaining required power will be distributed to the newly activated heat pump. If the output power of all currently activated heat pumps reaches the first output power, the additional power demand will be evenly distributed to all currently activated heat pumps. If the output power of all currently activated heat pumps reaches the second output power, n heat pumps of another type will be activated, and the additional power demand will be evenly distributed to n heat pumps of another type. If all heat pumps are activated and their output power reaches the second output power, the additional power demand will be evenly distributed to a gas-fired heat pumps (GHP) and b electric heat pumps (EHP).

[0131] If the current electricity price is the normal price, the additional output power will be evenly distributed to the currently started heat pumps; if the output power of any currently started heat pump reaches the first output power, another heat pump will be started, and the remaining required power will be distributed to the newly started heat pump; if all heat pumps are started and their output power reaches the first output power, the additional power demand will be evenly distributed to a gas heat pump (GHP) and b electric heat pumps (EHP).

[0132] The first output power can be 55% to 65%, for example, in some embodiments, the first output power is 60%; the second output power can be 75% to 85%, for example, in some embodiments, the second output power is 80%; and the value of n can be 2 ≤ n ≤ 8, for example, in some embodiments, n is set to 2.

[0133] In practice, under the current peak electricity price condition, m gas-fired heat pumps (GHPs) can be initially started. Subsequently, based on the change in ΔT, it can be confirmed that the updated output level is higher. The additional output power is then evenly distributed among the currently started m GHPs. If any one of the currently started GHPs reaches 60% of its output power, another GHP can be started, and the remaining required power is allocated to the newly started GHP. When the output power of all currently started GHPs reaches 60%, the additional power demand can be evenly distributed to... All gas-fired heat pumps (GHPs) are currently running. Once the output power of all currently running GHPs reaches 80%, n electric heat pumps (EHPs) can be started, and the additional power demand is evenly distributed among the n EHPs. This process is repeated until all heat pumps are running and their output power reaches 80%. Then, the additional power demand can be evenly distributed among a gas-fired heat pumps (GHPs) and b electric heat pumps (EHPs). Heat pumps with 100% output power no longer participate in the distribution until all heat pumps reach 100%. Here, m can be two or more heat pumps, and m is an even number. For example, in some embodiments, two heat pumps are initially started.

[0134] Given that the current electricity price is off-peak, initially m electric heat pumps (EHPs) can be started. Subsequently, based on the change in the value of ΔT, it can be confirmed that the updated output level is higher. The additional output power is then evenly distributed among the currently started m EHPs. If any one of the currently started EHPs reaches 60% of its output power, another EHP can be started, and the remaining required power is distributed to the newly started EHP. When the output power of all currently started EHPs reaches 60%, the additional power demand can be evenly distributed among all currently started EHPs. Electric heat pumps (EHP); when the output power of all currently started electric heat pumps (EHP) reaches 80%, n gas heat pumps (GHP) can be started, and the additional power demand is evenly distributed among the n gas heat pumps (GHP); the above process is repeated until all heat pumps are started and their output power reaches 80%, then the additional power demand can be evenly distributed among a gas heat pumps (GHP) and b electric heat pumps (EHP); heat pumps with an output power of 100% no longer participate in the distribution until all heat pumps reach 100%, where m can be 2 or more, and m is an even number. For example, in some embodiments, 2 heat pumps are initially started.

[0135] Under the current electricity price condition of normal, initially, 0.5m³ of gas-fired heat pumps (GHP) and 0.5m³ of electric heat pumps (EHP) can be started. Subsequently, based on the change in the value of ΔT, it can be confirmed that the updated output level is higher, and the increased output power is evenly distributed among the currently started 0.5m³ gas-fired heat pumps (GHP) and 0.5m³ electric heat pumps (EHP); the output power of either the currently started 0.5m³ gas-fired heat pumps (GHP) or 0.5m³ electric heat pumps (EHP) reaches 60%. In the event of a power shortage, any one heat pump can be started, and the remaining required power can be allocated to the newly started heat pump. This process is repeated until all heat pumps are started and their output power reaches 60%. Then, the additional power demand can be evenly distributed to a gas-fired heat pump (GHP) and b electric heat pumps (EHP). Heat pumps with 100% output power no longer participate in the allocation until all heat pumps reach 100%. Here, m can be two or more heat pumps, and m is an even number. For example, in some embodiments, two heat pumps are initially started. The control method for the combined heat pump unit provided in this application, through the design of the above-mentioned control method for increasing total output and allocating it to each heat pump, achieves the most efficient allocation of power increase under different electricity price types. At the same time, the corresponding output threshold is designed according to the characteristics of the unit, which greatly improves the overall operating efficiency of the system while significantly reducing operating costs.

[0136] In some embodiments, step 140, adjusting the output power of the currently activated heat pump or adjusting the number or type of activated heat pumps based on the updated output level, may further include:

[0137] When the updated output level is lower.

[0138] If the current electricity price is either peak or off-peak, and all heat pumps are running with their output power exceeding the second output power, the reduced power demand is evenly distributed among a gas-fired heat pumps (GHP) and b electric heat pumps (EHP) until all heat pumps reach the second output power. Then, the reduced power demand is evenly distributed among heat pumps not corresponding to the current electricity price type until all heat pumps not corresponding to the current electricity price type reach the first output power. Next, heat pumps not corresponding to the current electricity price type are shut down one by one until all heat pumps not corresponding to the current electricity price type are shut down. Then, the reduced power demand is evenly distributed among heat pumps corresponding to the current electricity price type until all heat pumps corresponding to the current electricity price type reach the first output power. Finally, heat pumps corresponding to the current electricity price type are shut down one by one until all heat pumps corresponding to the current electricity price type are shut down.

[0139] Under the current electricity price type of normal electricity price, the reduced power demand will be evenly distributed to all started heat pumps until the output power of all started heat pumps is the first output power; then start-up heat pumps will be shut down one by one in the order of startup until all heat pumps are shut down.

[0140] In actual implementation, under the current peak electricity price, both gas-fired heat pump (GHP) A and electric heat pump (EHP) B are started and their output power exceeds 80%. Subsequently, based on the change in the value of ΔT, it can be confirmed that the updated output level is lower. The reduced power demand is evenly distributed to gas-fired heat pump (GHP) A and electric heat pump (EHP) B until the output power of all heat pumps is 80%. The reduced power demand can then be evenly distributed to electric heat pump (EHP) B until the output power of electric heat pump (EHP) B reaches 60%. Then, electric heat pumps (EHP) B can be turned off one by one until all electric heat pumps (EHP) B are turned off. The reduced power demand can then be evenly distributed to gas-fired heat pump (GHP) A until the output power of gas-fired heat pump (GHP) A reaches 60%. Then, gas-fired heat pumps (GHP) A can be turned off one by one until all gas-fired heat pump (GHP) A is turned off.

[0141] Under the current off-peak electricity pricing, both gas-fired heat pump (GHP) a and electric heat pump (EHP) b are running and operating at over 80% capacity. Based on the change in ΔT, it can be confirmed that the updated output level is lower. The reduced power demand is then evenly distributed among GHP a and the eight EHPs until all heat pumps operate at 80% capacity. The reduced power demand can then be further evenly distributed among GHP a until its output reaches 60%. GHPs can then be shut down one by one until GHP a is completely off. Similarly, EHPs can be evenly distributed among EHP b until their output reaches 60%. Finally, EHPs can be shut down one by one until all EHPs are completely off.

[0142] Under the current electricity price condition of normal, both gas heat pump (GHP) a and electric heat pump (EHP) b are started and their output power exceeds 80%. Subsequently, based on the change in the value of ΔT, it can be confirmed that the updated output level is lower. The reduced power demand can be evenly distributed between gas heat pump (GHP) a and electric heat pump (EHP) b until the output power of gas heat pump (GHP) a and electric heat pump (EHP) b is 60%. Then, the heat pumps that were started are turned off one by one in the order they were started. In other words, the heat pumps that started first are turned off first, and the heat pumps that started later are turned off last, until both gas heat pump (GHP) a and electric heat pump (EHP) b are turned off.

[0143] The control method for the combined heat pump unit provided in this application, through the design of the control method of reducing the total output and allocating it to each heat pump, achieves the most effective allocation of power reduction under different electricity price types. At the same time, the corresponding output threshold is designed according to the characteristics of the unit, which greatly improves the overall operating efficiency of the system while significantly reducing the operating cost, thereby improving the economic efficiency of the product.

[0144] In some embodiments, the combined heat pump unit 200 can have a total of n output levels, and the difference Q0 in output power between two adjacent levels can be:

[0145] Q0 = Q s / n;

[0146] in, Qgm i Let Qgm be the maximum output power of the i-th gas heat pump (GHP). j This represents the maximum output power of the j-th electric heat pump (EHP).

[0147] Understandably, Qs can be the maximum total output power of the combined heat pump unit 200, and the difference in output power between two adjacent levels, Q0, can be the output power of each level. Qs can be equal to the maximum total output power of a gas heat pump (GHP) plus the maximum total output power of b electric heat pumps (EHP). The maximum total output power of a gas heat pump (GHP) can be equal to the sum of the maximum output power of each gas heat pump (GHP), and the maximum total output power of b electric heat pumps (EHP) can be equal to the sum of the maximum output power of each electric heat pump (EHP).

[0148] The value of n can be 15≤△T≤25. For example, in some embodiments, the combined heat pump unit 200 has a total of 20 output levels. In other words, the difference in output power Q0 between two adjacent levels is 0.05Qs.

[0149] The control method for the combined heat pump unit provided in this application, through the numerical design of the difference Q0 between the output power of the two adjacent gears, divides the maximum total output power of the combined heat pump unit 200 into multiple gears, and the output power corresponding to each gear is equal, thereby greatly reducing the complexity of energy distribution and improving the practicality and user experience of the unit.

[0150] The control method for a combined heat pump unit provided in this application embodiment can be executed by a control device 300 for the combined heat pump unit. This application embodiment uses the control device 300 of the combined heat pump unit executing the control method as an example to illustrate the control device 300 of the combined heat pump unit provided in this application embodiment.

[0151] This application also provides a control device 300 for a combined heat pump unit.

[0152] like Figure 3 As shown, the control device 300 of the combined heat pump unit includes:

[0153] The first processing module 310 is used to determine the current electricity price type when it receives the power-on command. The electricity price type includes peak electricity price, normal electricity price and off-peak electricity price.

[0154] The first control module 320 is used to determine the start of m heat pumps from a gas-fired heat pump (GHP) and b electric heat pumps (EHP) based on the current electricity price type, and the initial output power of the m heat pumps is determined based on the initial output level of the combined heat pump unit 200.

[0155] The second processing module 330 is used to update the output level of the combined heat pump unit 200 based on the outlet water temperature and the set temperature of the combined heat pump unit 200 after the first target duration of the start-up of the m heat pumps.

[0156] A second control module 340, configured to adjust the output power of the currently started heat pump or adjust the number or type of the started heat pumps based on the updated output gear position.

[0157] According to the control device 300 of the combined heat pump unit provided by the embodiment of the present application, through the above-mentioned energy regulation logic design of the dual drive source combination, on the one hand, the priority of the electricity price setting module is set, and the output threshold is designed according to the characteristics of the unit, thereby improving the overall system operation efficiency and further reducing the operation cost; on the other hand, a central controller 240 controls all heat pumps at the same time, and the gas heat pump (GHP) and the electric heat pump (EHP) use existing products without special development, making the overall structure lightweight and the layout simple, thus reducing the product cost.

[0158] In some embodiments, the first control module 320 may also be configured to:

[0159] When the current electricity price type is peak electricity price, determine m gas heat pumps (GHP) to start from a gas heat pumps (GHP);

[0160] When the current electricity price type is normal electricity price, determine 0.5m gas heat pumps (GHP) to start from a gas heat pumps (GHP), and determine 0.5m electric heat pumps (EHP) to start from b electric heat pumps (EHP);

[0161] When the current electricity price type is valley electricity price, determine m electric heat pumps (EHP) to start from b electric heat pumps (EHP).

[0162] According to the control device 300 of the combined heat pump unit provided by the embodiment of the present application, through the design of the above-mentioned priority start module, the priority module is confirmed according to the electricity price type, and the output power is allocated in cooperation with the central controller 240, which can minimize the expenditure of the heat pump cost, thereby improving the economy and practicability of the combined heat pump unit 200.

[0163] In some embodiments, the second processing module 330 may also be configured to:

[0164] When t1 < ΔT, the output gear position increases by the first target number of gears every first target duration;

[0165] When t2 ≤ ΔT ≤ t1, maintain the current output gear position;

[0166] When t3 ≤ ΔT < t2, the output gear position decreases by the second target number of gears every second target duration;

[0167] When ΔT < t3, control the combined heat pump unit 200 to stop; where

[0168] t1 is the first target value, t2 is the second target value, and t3 is the third target value; in the refrigeration mode, ΔT = TL - TS; in the heating mode, ΔT = TS - TL; TL is the water outlet temperature and TS is the set temperature.

[0169] According to the control device 300 of the combined heat pump unit provided by the embodiment of the present application, through the design of the above output gear adjustment mechanism, according to the change of the difference between the water outlet temperature TL and the set temperature TS, the output gear of the combined heat pump unit 200 is updated and adjusted in different modes and in different sections, avoiding the excessive gap between the water outlet temperature TL and the set temperature TS in the refrigeration mode and the heating mode, thereby improving the comfort and experience of the entire unit.

[0170] In some embodiments, the first target duration, the first target number of gears, the second target duration, and the second target number of gears can be determined based on the magnitude of ΔT.

[0171] According to the control device 300 of the combined heat pump unit provided by the embodiment of the present application, through the setting of the above confirmation methods for the first target duration, the first target number of gears, the second target duration, and the second target number of gears, the intelligent temperature control function in the refrigeration mode and the heating mode is realized, ensuring that the gap between the water outlet temperature TL and the set temperature TS is maintained within a controllable range, thereby improving the stability of the entire unit.

[0172] In some embodiments, when t1 < ΔT, ΔT is negatively correlated with the first target duration and positively correlated with the first target number of gears; when t3 ≤ ΔT < t2, ΔT is positively correlated with the second target duration and negatively correlated with the second target number of gears.

[0173] According to the control device 300 of the combined heat pump unit provided by the embodiment of the present application, through the numerical settings of the above first target duration, the first target number of gears, the second target duration, and the second target number of gears, the central controller 240 can adjust the target number of gears and allocate energy according to the numerical change of ΔT, thereby optimizing the adjustment working performance and operation efficiency of the unit, and further improving the intelligence of the entire unit.

[0174] In some embodiments, the second control module 340 can also be used for:

[0175] When the updated output gear is higher

[0176] If the current electricity price is either peak or off-peak, the additional output power will be evenly distributed to the currently activated heat pumps. If the output power of any currently activated heat pump reaches the first output power, another heat pump of the same type will be activated, and the remaining required power will be distributed to the newly activated heat pump. If the output power of all currently activated heat pumps reaches the first output power, the additional power demand will be evenly distributed to all currently activated heat pumps. If the output power of all currently activated heat pumps reaches the second output power, n heat pumps of another type will be activated, and the additional power demand will be evenly distributed to n heat pumps of another type. If all heat pumps are activated and their output power reaches the second output power, the additional power demand will be evenly distributed to a gas-fired heat pumps (GHP) and b electric heat pumps (EHP).

[0177] If the current electricity price is the normal price, the additional output power will be evenly distributed to the currently started heat pumps; if the output power of any currently started heat pump reaches the first output power, another heat pump will be started, and the remaining required power will be distributed to the newly started heat pump; if all heat pumps are started and their output power reaches the first output power, the additional power demand will be evenly distributed to a gas heat pump (GHP) and b electric heat pumps (EHP).

[0178] According to the control device 300 of the combined heat pump unit provided in the embodiments of this application, the design of the control method of increasing the total output and allocating it to each heat pump achieves the most efficient allocation of power increase under different electricity price types. At the same time, the corresponding output threshold is designed according to the characteristics of the unit, which greatly improves the overall operating efficiency of the system while significantly reducing the operating cost.

[0179] In some embodiments, the second control module 340 can also be used for:

[0180] When the updated output level is lower.

[0181] If the current electricity price is either peak or off-peak, and all heat pumps are running with their output power exceeding the second output power, the reduced power demand is evenly distributed among a gas-fired heat pumps (GHP) and b electric heat pumps (EHP) until all heat pumps reach the second output power. Then, the reduced power demand is evenly distributed among heat pumps not corresponding to the current electricity price type until all heat pumps not corresponding to the current electricity price type reach the first output power. Next, heat pumps not corresponding to the current electricity price type are shut down one by one until all heat pumps not corresponding to the current electricity price type are shut down. Then, the reduced power demand is evenly distributed among heat pumps corresponding to the current electricity price type until all heat pumps corresponding to the current electricity price type reach the first output power. Finally, heat pumps corresponding to the current electricity price type are shut down one by one until all heat pumps corresponding to the current electricity price type are shut down.

[0182] Under the current electricity price type of normal electricity price, the reduced power demand will be evenly distributed to all started heat pumps until the output power of all started heat pumps is the first output power; then start-up heat pumps will be shut down one by one in the order of startup until all heat pumps are shut down.

[0183] According to the control device 300 of the combined heat pump unit provided in the embodiments of this application, the design of the control method of reducing the total output and allocating it to each heat pump achieves the most effective allocation of power reduction under different electricity price types. At the same time, the corresponding output threshold is designed according to the characteristics of the unit, which greatly improves the overall operating efficiency of the system and greatly reduces the operating cost, thereby improving the economic efficiency of the product.

[0184] In some embodiments, the combined heat pump unit 200 has a total of n output levels, and the difference Q0 in output power between two adjacent levels is:

[0185] Q0 = Q s / n;

[0186] in, Qgm i Let Qgm be the maximum output power of the i-th gas heat pump (GHP). j This represents the maximum output power of the j-th electric heat pump (EHP).

[0187] According to the control device 300 of the combined heat pump unit provided in the embodiment of this application, by designing the value of the difference Q0 between the output power of the two adjacent gears, the maximum total output power of the combined heat pump unit 200 is divided into multiple gears, and the output power corresponding to each gear is equal, thereby greatly reducing the complexity of energy distribution and improving the practicality and user experience of the unit.

[0188] The control device 300 of the combined heat pump unit in this application embodiment can be an electronic device or a component of an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the specific implementation.

[0189] The control device 300 of the combined heat pump unit in this embodiment can be a device with an operating system. This operating system can be a Microsoft (Windows) operating system, an Android operating system, an iOS operating system, or other possible operating systems; this embodiment does not specifically limit the specific operating system.

[0190] The control device 300 for the combined heat pump unit provided in this application embodiment can achieve... Figure 1 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0191] This application also provides a combined heat pump unit 200.

[0192] In some embodiments, the combined heat pump unit 200 includes:

[0193] A control device 300 for a gas-fired heat pump (GHP), an electric heat pump (EHP), and a combined heat pump unit as described above.

[0194] According to the combined heat pump unit 200 provided in the embodiments of this application, by setting the control device 300 of the combined heat pump unit, on the one hand, it ensures that the heating and cooling effects are both good, while improving the energy utilization efficiency, thereby improving the energy efficiency and convenience of the entire unit; on the other hand, it is not affected by the outdoor temperature in the cooling or heating state, which greatly increases the maximum output power of the unit while reducing the operating cost of the entire unit.

[0195] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described control method embodiment for the combined heat pump unit and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0196] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0197] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the control method of the above-described combined heat pump unit.

[0198] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0199] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described control method embodiment for the combined heat pump unit, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0200] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0201] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0202] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0203] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0204] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0205] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method of a combined heat pump unit, characterized by, The combined heat pump unit comprises a gas heat pump and an electric heat pump arranged in parallel, and the control method comprises: Upon receiving a start-up instruction, determine the current electricity price type, which includes peak electricity price, normal electricity price and valley electricity price; Based on the current electricity price type, determine m heat pumps to start from the a gas heat pumps and b electric heat pumps, and the initial output power of the m heat pumps is determined based on the initial output gear of the combined heat pump unit; After the m heat pumps are started for a first target duration, update the output gear of the combined heat pump unit based on the outlet water temperature and the set temperature of the combined heat pump unit; Based on the updated output gear, adjust the output power of the currently started heat pumps or adjust the number or type of the started heat pumps; When the updated output gear is higher, if the current electricity price type is normal electricity price, the additional output power is evenly distributed to the currently started heat pumps; if the output power of any of the currently started heat pumps reaches a first output power, start another heat pump and distribute the remaining required power to the newly started heat pump; If all the heat pumps are started and the output power reaches the first output power, evenly distribute the additional power requirement to the a gas heat pumps and b electric heat pumps.

2. The control method of a combined heat pump package according to claim 1, characterized by, The determination of m heat pumps to start from the a gas heat pumps and b electric heat pumps based on the current electricity price type comprises: If the current electricity price type is peak electricity price, determine m gas heat pumps to start from the a gas heat pumps; If the current electricity price type is normal electricity price, determine 0.5m gas heat pumps to start from the a gas heat pumps and 0.5m electric heat pumps to start from the b electric heat pumps; If the current electricity price type is valley electricity price, determine m electric heat pumps to start from the b electric heat pumps.

3. The control method of a combined heat pump unit according to claim 1, characterized by, The update of the output gear of the combined heat pump unit based on the outlet water temperature and the set temperature of the combined heat pump unit comprises: If t1<ΔT, the output gear is increased by a first target gear number every first target duration; If t2≤ΔT≤t1, the current output gear is maintained; If t3≤ΔT<t2, the output gear is decreased by a second target gear number every second target duration; If ΔT<t3, control the combined heat pump unit to stop; wherein t1 is a first target value, t2 is a second target value, and t3 is a third target value; in cooling mode, ΔT=TL-TS; in heating mode, ΔT=TS-TL; TL is the outlet water temperature, and TS is the set temperature.

4. The control method of a combined heat pump unit according to claim 3, characterized by, The first target duration, the first target gear number, the second target duration and the second target gear number are determined based on the size of ΔT.

5. The control method of the combined heat pump unit according to claim 4, wherein If t1<ΔT, ΔT is negatively correlated with the first target duration, and ΔT is positively correlated with the first target gear number; If t3≤ΔT<t2, ΔT is positively correlated with the second target duration, and ΔT is negatively correlated with the second target gear number.

6. The control method of a combined heat pump package according to any one of claims 1-5, characterized in that, The output gear based on the updated output gear adjusts the output power of the currently started heat pump or adjusts the number or type of the started heat pump, comprising: When the updated output gear is higher, When the current electricity price type is peak electricity price or valley electricity price, the added output power is evenly distributed to the currently started heat pump; when the output power of any of the currently started heat pumps reaches the first output power, another heat pump of the same type is started, and the remaining required power is distributed to the newly started heat pump; when the output power of all currently started heat pumps reaches the first output power, the added power requirement is evenly distributed to all currently started heat pumps; when the output power of all currently started heat pumps reaches the second output power, n heat pumps of another type are started, and the added power requirement is evenly distributed to the n heat pumps of another type; when all heat pumps are started and the output power reaches the second output power, the added power requirement is evenly distributed to a gas heat pump and b electric heat pump.

7. The control method of the combined heat pump unit according to any one of claims 1-5, wherein, When the updated output gear is lower, When the current electricity price type is peak electricity price or valley electricity price, and all heat pumps are started and the output power exceeds the second output power, the reduced power requirement is evenly distributed to a gas heat pump and b electric heat pump until the output power of all heat pumps reaches the second output power; then the reduced power requirement is evenly distributed to the heat pumps not corresponding to the current electricity price type until the output power of all heat pumps not corresponding to the current electricity price type reaches the first output power; then the heat pumps not corresponding to the current electricity price type are closed one by one until all heat pumps not corresponding to the current electricity price type are closed; then the reduced power requirement is evenly distributed to the heat pumps corresponding to the current electricity price type until the output power of all heat pumps corresponding to the current electricity price type reaches the first output power; then the heat pumps corresponding to the current electricity price type are closed one by one until all heat pumps corresponding to the current electricity price type are closed; When the current electricity price type is off-peak electricity price, the reduced power requirement is evenly distributed to all started heat pumps until the output power of all started heat pumps reaches the first output power; then the started heat pumps are closed one by one in the order of starting until all heat pumps are closed.

8. The control method of a combined heat pump unit according to any one of claims 1 to 5, characterized by, The output gear of the combined heat pump unit has a total of n gears, and the difference Q0 in output power between adjacent gears is: Q0 = Q s / n; wherein, , Qgm i is the maximum output power of the i-th gas heat pump, Qgm j is the maximum output power of the j-th electric heat pump.

9. A control device for a combined heat pump unit, characterized in that The control device for implementing the control method of the combined heat pump unit according to any one of claims 1-8, comprising: The first processing module is configured to determine the current electricity price type when receiving the start-up instruction, and the electricity price type includes peak electricity price, off-peak electricity price, and valley electricity price; The first control module is configured to determine m heat pumps to start from the a gas heat pumps and b electric heat pumps based on the current electricity price type, and the initial output power of the m heat pumps is determined based on the initial output gear of the combined heat pump unit; The second processing module is configured to update the output gear of the combined heat pump unit based on the outlet water temperature and the set temperature of the combined heat pump unit after the first target time length of starting the m heat pumps. The second control module is configured to adjust the output power of the currently started heat pump or adjust the number or type of the started heat pumps based on the updated output gear.

10. A combined heat pump unit, characterized in that The control device comprises: a gas heat pump, an electric heat pump, and the combined heat pump unit according to claim 9.

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