Air source heat pump hot water unit and control method and device thereof

Abstract

The invention provides an air source heat pump hot water unit and a control method and device thereof, and relates to the technical field of heat pumps. The control method comprises the steps that the target heating temperature and the water using time are determined; calculating the heat Q required for heating the water in the water tank to the target heating temperature; the corresponding relation between the heating capacity of the air source heat pump hot water unit and time is determined; a target heating time period is determined according to the corresponding relation between the heating capacity and time; and the air source heat pump hot water unit is controlled to heat in the target heating time period. According to the scheme, the unit heating is controlled by adopting the reservation control strategy, the target heating time period is reasonably determined by calculating the heat required by the reservation water consumption moment and combining the corresponding relation between the heating capacity of the unit and the time, the reservation heating process can be conveniently completed by utilizing the time period with the higher heating capacity of the unit, the unit energy consumption is reduced, and the heating efficiency is improved. The purpose of active energy saving is achieved, and the water using requirement of a terminal user and the energy saving performance of the air source heat pump hot water unit are taken into consideration.

Description

Technical Field

[0001] The present application relates to the technical field of heat pumps, and specifically refers to an air source heat pump water heater unit and a control method and a control device thereof. Background Art

[0002] Air source heat pump units, because they consume only a small part of the electricity, can absorb most of the heat from the air and transfer it to the water for producing domestic hot water or heating hot water, with high energy efficiency and good economic benefits, are now gradually becoming the mainstream way to produce domestic hot water or space heating. Existing air source heat pump hot water units generally use real-time heating to store hot water in water tanks, which does not meet the requirements of energy saving and consumption reduction. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide an air source heat pump water heater unit and a control method and a control device thereof, which meet the requirements of energy saving and consumption reduction and are conducive to taking into account both terminal water demand and energy saving.

[0004] The present application embodiment provides a control method for an air source heat pump water heater unit, the control method comprising: Determine the target heating temperature and water use time; Calculate the heat Q required to heat the water in the water tank to the target heating temperature; Determine the corresponding relationship between the heating capacity and time of the air source heat pump water heater unit; Determining a target heating time period according to the corresponding relationship between the heating capacity and time; The air source heat pump water heater is controlled to perform heating in the target heating time period.

[0005] The control method provided in the embodiment of the present application adopts a reservation control strategy to control the heating of the unit. By calculating the heat required at the time of reserved water use and combining the correspondence between the heating capacity of the unit and time, the target heating time period is reasonably determined. This facilitates the use of time periods with higher heating capacity of the unit to complete the reserved heating process, thereby reducing the energy consumption of the unit and achieving the purpose of active energy saving, which is beneficial to taking into account the water demand of end users and the energy saving of the air source heat pump water heater unit.

[0006] Based on the above technical solution, the present application can also be improved as follows.

[0007] In some embodiments, the air source heat pump water heater unit is a fixed speed unit, and the target heating time period is determined according to the corresponding relationship between the heating capacity and time, including: determining the heat Q1, Q2, ..., Qn that the air source heat pump water heater unit can output at different times within the set time according to the corresponding relationship between the heating capacity and time, wherein n=the number of equal-length time periods included in the set time, and the set time is greater than or equal to the interval between the current time and the water use time; based on the continuous time period satisfying ≥Q and meet the water use time, select the one that meets ≥Q and satisfy all the shortest continuous time periods of the water use time, where 1≤m≤k≤n; calculating the average heating capacity of each of the shortest continuous time periods, and selecting the shortest continuous time period with the largest average heating capacity as the target heating time period.

[0008] In some embodiments, determining the target heating time period according to the corresponding relationship between the heating capacity and time further includes: based on the absence of a continuous time period satisfying ≥Q and the water use time is met, the current time is taken as the starting time, the time when the target heating temperature is reached is taken as the ending time, and the time period between the starting time and the ending time is taken as the target heating time period.

[0009] In this way, the target heating time period of the fixed-speed unit can be found, so that the time period with higher heating capacity of the fixed-speed unit can be used to complete the scheduled heating process, so as to reduce the energy consumption of the unit and achieve the purpose of active energy saving.

[0010] In some embodiments, the air source heat pump water heater unit is a variable frequency unit, and the variable frequency unit has a set high energy efficiency working frequency range, and the set high energy efficiency working frequency range is divided into a plurality of different frequency bands and gears, and the correspondence between the heating capacity and time includes the correspondence between the heating capacity and time of the plurality of different frequency bands and gears; the control method also includes: determining the frequency band gear corresponding to the target heating time period as the target frequency band gear; controlling the air source heat pump water heater unit to heat in the target heating time period, including: controlling the air source heat pump water heater unit to heat in the target heating time period with the target frequency band gear.

[0011] At the same ambient temperature, the heating capacity of the unit is different at different frequencies, so the corresponding relationship between the heating capacity and time of the variable frequency unit can include the corresponding relationship between the heating capacity and time of multiple different frequency bands and gears according to the different frequency band gears in the high-efficiency working frequency range. Therefore, for the variable frequency unit, it is also necessary to determine the target frequency band gear, and heat according to the target frequency band gear and target heating time period, in order to make good use of the frequency conversion of the air source heat pump water heater unit and better balance the terminal water demand and energy saving.

[0012] In some embodiments, the target heating time period is determined according to the correspondence between the heating capacity and time, including: determining the amount of heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times within a set time according to the correspondence between the heating capacity of the lowest frequency band and time, wherein n = the number of equal-length time periods included in the set time, and the set time is greater than or equal to the interval between the current moment and the water use moment; determining whether there are continuous time periods that meet the correspondence between the heating capacity and time of the lowest frequency band and time. ≥Q and meet the water use time, select the one that meets ≥Q and satisfy all the shortest continuous time periods of the water use time, wherein 1≤m≤k≤n; calculating the average heating capacity of each of the shortest continuous time periods corresponding to the lowest frequency band gear, selecting the shortest continuous time period with the largest average heating capacity as the target heating time period; determining that no continuous time period satisfies the corresponding relationship between the heating capacity and time of the lowest frequency band gear ≥Q and the water usage time is met, the target heating time period is determined according to the corresponding relationship between the heating capacity of the higher frequency band and time.

[0013] In some embodiments, the target heating time period is determined according to the correspondence between the heating capacity of the higher frequency band and time, including: determining the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times according to the correspondence between the heating capacity of the higher frequency band and time; determining whether there is a continuous time period that satisfies the corresponding relationship between the heating capacity of the higher frequency band and time. ≥Q and meet the water use time, select the one that meets ≥Q and satisfy all the shortest continuous time periods of the water use time, where 1≤m≤k≤n; calculate the average heating capacity of each of the shortest continuous time periods of the higher frequency band, and select the shortest continuous time period with the largest average heating capacity as the target heating time period; determine based on the corresponding relationship between the heating capacity of the higher frequency band and time that no continuous time period satisfies ≥Q and the water usage time is met, return to execute the step of determining the target heating time period according to the correspondence between the heating capacity and time of the higher frequency band gear and correspondingly change the correspondence between the heating capacity and time of the higher frequency band gear.

[0014] In some embodiments, the determining of the target heating time period according to the correspondence between the heating capacity of the higher frequency band and time further includes: determining that no continuous time period satisfies the correspondence between the heating capacity of the highest frequency band and time. ≥Q and the water use time is met, the current time is taken as the starting time, the time when the target heating temperature is reached is taken as the ending time, and the time period between the starting time and the ending time is taken as the target heating time period.

[0015] In this way, the target heating time period of the variable frequency unit can be found, so that the time period with higher heating capacity of the variable frequency unit can be used to complete the scheduled heating process, so as to reduce the energy consumption of the unit and achieve the purpose of active energy saving.

[0016] In some embodiments, the set duration=24h. This corresponds to the duration of the current 24-hour weather forecast, making it easier to determine the heating capacity at the corresponding time based on the 24-hour weather data.

[0017] In some embodiments, the starting time of the set duration is a fixed time; or, the starting time of the set duration is the current time; or, the starting time of the set duration is the time corresponding to the set duration pushed forward by the water use time.

[0018] In some embodiments, the corresponding relationship between the heating capacity and time of the air source heat pump water heater unit is: a heating capacity distribution curve.

[0019] The curve form is more intuitive and it is more convenient to determine the heating capacity. Of course, the corresponding relationship between the heating capacity of the unit and time can also be expressed in other forms, such as in the form of a mapping table.

[0020] In some embodiments, determining the correspondence between the heating capacity and time of the air source heat pump water heater unit includes: determining the correspondence between the heating capacity and time of the air source heat pump water heater unit according to a preset correspondence between time, ambient temperature and heating capacity; or determining the correspondence between the heating capacity and time of the air source heat pump water heater unit according to the correspondence between time, ambient temperature and heating capacity calculated from weather data obtained from the cloud.

[0021] The correspondence between the preset time, ambient temperature and heating capacity is used to determine the correspondence between the heating capacity and time of the air source heat pump water heater unit. The unit does not need to be connected to the Internet, and the networking module can be omitted, which is beneficial to reducing production costs, reducing the calculation amount of the unit, and simplifying the electronic control program.

[0022] The correspondence between the time, ambient temperature and heating capacity calculated based on the weather data obtained from the cloud is used to determine the correspondence between the heating capacity and time of the air source heat pump water heater unit. The determined ambient temperature is the real-time temperature, which is more accurate. Therefore, the correspondence between the heating capacity and time of the unit is more accurate and has a small error, which is conducive to better balancing the water demand of end users and the energy saving of the air source heat pump water heater unit.

[0023] In some embodiments, the calculation of the heat Q required to heat the water in the water tank to the target heating temperature includes: calculating the heat Q required to heat the water in the water tank to the target heating temperature according to the formula Q=C×V×ρ×h%×(Ts-T5); wherein C is the specific heat capacity of water, in units of J / (kg·℃); V is the capacity of the water tank, in units of m 3 ; ρ is the density of water, in kg / m 3 ; h% is the current water level of the water tank, which is a dimensionless number, 0<h≤100; Ts is the target heating temperature, in °C; T5 is the current water temperature of the water tank, in °C.

[0024] In some embodiments, the air source heat pump water heater is a commercial air source heat pump water heater, and the control method further includes: determining the capacity V of the water tank before calculating the heat Q required to heat the water in the water tank to the target heating temperature.

[0025] In some embodiments, the control method further includes: controlling the air source heat pump water heater unit to enter a heat preservation mode based on heating the water in the water tank to the target heating temperature.

[0026] An embodiment of the present application further provides a control device, including a processor and a memory storing a computer program, wherein the processor implements the steps of the control method described in any one of the above embodiments when executing the computer program.

[0027] The embodiment of the present application also provides an air source heat pump water heater unit, comprising the control device as described in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A flow chart of a control method provided in some embodiments of the present application; Figure 2A partial flow chart of a control method provided by an embodiment of the present application; Figure 3 A partial flow chart of a control method provided by an embodiment of the present application; Figure 4 A schematic diagram of a heating capacity distribution curve of a unit provided in one embodiment of the present application; Figure 5 A schematic diagram of an ambient temperature distribution curve provided for one embodiment of the present application. DETAILED DESCRIPTION

[0029] The principles and features of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0030] Air source heat pump water heaters absorb heat from the air, and their heating efficiency is greatly affected by the ambient air temperature. Generally speaking, when the ambient temperature is high, the heating efficiency of air source heat pump water heaters is high; when the ambient temperature is low, the heating efficiency of air source heat pump water heaters is low. Existing air source heat pump water heaters generally use real-time heating to store hot water in water storage tanks, which does not meet the requirements of energy saving and consumption reduction. For example: For commercial air source heat pump water heaters, the same model of unit can be equipped with water tanks of different volumes. Affected by factors such as unknown actual water consumption, non-fixed water tank volume, and variable ambient temperature, they are generally heated in real time and then stored in water tanks.

[0031] However, in the context of energy conservation and consumption reduction, and the trend of end users paying more and more attention to energy conservation, air source heat pump water heaters are increasingly in need of active energy-saving strategies. For example, in some scenarios, the end users' water use time is relatively concentrated, and the real-time heating method is always used, which will obviously cause heat waste and does not meet the requirements of energy conservation and consumption reduction. Especially for scenarios with relatively concentrated water use such as school dormitories and workers' dormitories, as well as BOT (Build-Operate-Transfer) customers (or customers with energy contract management), active energy-saving strategies are more meaningful.

[0032] To this end, the present application embodiment provides a control method for an air source heat pump water heater unit. Figure 1 As shown, the control method includes: Step S102: Determine the target heating temperature and water use time; Step S104: Calculate the heat Q required to heat the water in the water tank to the target heating temperature; Step S106: determining the corresponding relationship between the heating capacity of the air source heat pump water heater unit and time; Step S108: determining a target heating time period according to the corresponding relationship between heating capacity and time; Step S110: Control the air source heat pump water heater to perform heating in the target heating time period.

[0033] The control method provided in the embodiment of the present application adopts a reservation control strategy to control the heating of the unit. By calculating the heat required at the time of reserved water use and combining the correspondence between the heating capacity of the unit and time, the target heating time period is reasonably determined. This facilitates the use of time periods with higher heating capacity of the unit to complete the reserved heating process, thereby reducing the energy consumption of the unit and achieving the purpose of active energy saving, which is beneficial to taking into account the water demand of end users and the energy saving of the air source heat pump water heater unit.

[0034] In step S102, the target heating temperature refers to the heating temperature set by the user, and the water use time refers to the scheduled water use time set by the user. The user can input the target heating temperature and water use time through a wired controller, a remote controller, an operation panel, or a terminal device (such as a mobile phone APP), and the control device can determine the target heating temperature and water use time according to the heating temperature and water use time input by the user.

[0035] In step S106, the correspondence between heating capacity and time refers to the correspondence between the heating capacity of the air source heat pump water heater unit and the change of time. Among them, the heating capacity of the unit can represent the amount of heat that the unit can output, then the correspondence between the heating capacity and time, that is, the correspondence between the heat output of the air source heat pump water heater unit and the change of time. Alternatively, the heating capacity of the unit can represent the heating power of the unit, then the correspondence between the heating capacity and time, that is, the correspondence between the heating power of the air source heat pump water heater unit and the change of time. When the heating power remains unchanged, the product of the heating power and the heating time is the amount of heat that the unit can output. Therefore, the above two schemes can be converted by simple calculation.

[0036] The heating capacity of the air source heat pump water heater is directly related to the ambient temperature. When other conditions are the same, the heating capacity of the air source heat pump water heater increases with the increase of the ambient temperature. Therefore, when other conditions are the same, there is a corresponding relationship between the heating capacity of the air source heat pump water heater and the ambient temperature. This corresponding relationship can be obtained according to the test results during the test process before leaving the factory, so it can be calibrated by the manufacturer before leaving the factory. There is also a corresponding relationship between the ambient temperature and time. It can be obtained that the ambient temperature can be determined according to the time, and the heating capacity of the unit can be determined according to the ambient temperature, so the heating capacity of the unit can be determined according to the time.

[0037] It is understandable that the ambient temperature generally does not change frequently and drastically in a short period of time. Generally, the ambient temperature can be considered to be a fixed value within a time period, and the length of the time period can be reasonably set as needed, such as 1h, or it can also be 10min, 30min, 1.5h, 2h or other time periods. The heating power or heat output of the unit in this time period (equal to heating power × time period length) can be obtained according to the corresponding ambient temperature, that is, the heating capacity of the time period, which can be marked with the initial moment, end moment or middle moment (or other moment) of the time period, then: When the heating capacity represents the amount of heat that the unit can output, the corresponding relationship between the heating capacity of the unit and time is the corresponding relationship between the heat that the unit can output and time, and the corresponding relationship between the heating capacity of the unit and time can be expressed as Q1, Q2, ... Qn. When the heating capacity represents the heating power of the unit, the corresponding relationship between the heating capacity of the unit and time can be expressed as W1, W2, ... Wn, and the corresponding relationship between the heat that the unit can output and time can be expressed as Q1, Q2, ... Qn. n = the number of equal-length time periods (hereinafter referred to as time periods) included in the set duration. Qi = Wi × time period length, 1≤i≤n.

[0038] The set duration is greater than or equal to the interval between the current time and the water use time, which can avoid wasting energy due to excessively long subsequent insulation time caused by heating too early, so it is also beneficial to energy saving. Since the scheduled water use is basically scheduled for a certain time of the day, the set duration can be but is not limited to 24h. For example, taking the set duration of 24h as an example, if the time period length is 1h, then n=24; if the time period length is 30min, then n=48; if the time period length is 2h, then n=12; if the time period length is 10min, then n=144; if the time period length is 1.5h, then n=16.

[0039] The starting time of the set duration may be a fixed time, such as 0 o'clock (or other time). Alternatively, the time corresponding to the set duration before the water use time may be used as the starting time of the set duration, and the end time of the set duration is the water use time. Alternatively, the current time may be used as the starting time of the set duration.

[0040] For example, taking the heating capacity as the heat output of the unit, the set duration as 24h, the starting time as 0 o'clock, and the time period length as 1h as an example (that is, the ambient temperature within 1h is considered to be a fixed value), then the 24 hours of a day can be divided into 24 consecutive time periods, and the corresponding relationship between the heating capacity of the air source heat pump water heater unit and time can be expressed as: 0 o'clock-Q1 (indicating the heat output from 0 o'clock to 1 o'clock, the heating capacity marked as 0 o'clock is Q1), 1 o'clock-Q2 (indicating the heat output from 1 o'clock to 2 o'clock, the heating capacity marked as 1 o'clock is Q2), 2 o'clock-Q3 (indicating the heat output from 2 o'clock to 3 o'clock, the heating capacity marked as 2 o'clock is Q3), 3 o'clock-Q4 (indicating the heat output from 3 o'clock to 4 o'clock, the heating capacity marked as Q4), The output heat, the heating capacity at 3 is Q4), 4 o'clock - Q5 (indicates the heat that can be output from 4 to 5 o'clock, the heating capacity at 4 is Q5), 5 o'clock - Q6 (indicates the heat that can be output from 5 to 6 o'clock, the heating capacity at 5 is Q6), 6 o'clock - Q7 (indicates the heat that can be output from 6 to 7 o'clock, the heating capacity at 6 is Q7), 7 o'clock - Q8 (indicates the heat that can be output from 7 to 8 o'clock, the heating capacity at 7 is Q8), 8 o'clock - Q9 (indicates the heat that can be output from 8 to 9 o'clock, the heating capacity at 8 is Q9), 9 o'clock - Q10 (indicates the heat that can be output from 9 to 10 o'clock, the heating capacity at 9 is Q10), 10 12 o'clock-Q13 (indicates the heat that can be output from 12 o'clock to 13 o'clock, the heating capacity marked at 12 o'clock is Q13), 13 o'clock-Q14 (indicates the heat that can be output from 13 o'clock to 14 o'clock, the heating capacity marked at 13 o'clock is Q14), 14 o'clock-Q15 (indicates the heat that can be output from 14 o'clock to 15 o'clock, the heating capacity marked at 14 o'clock is Q15), 15 o'clock-Q16 (indicates the heat that can be output from 15 o'clock to 16 o'clock, the heating capacity marked at 15 o'clock is Q16). The capacity is Q16), 16 o'clock-Q17 (indicates the heat that can be output from 16 o'clock to 17 o'clock, and the heating capacity marked as 16 o'clock is Q17), 17 o'clock-Q18 (indicates the heat that can be output from 17 o'clock to 18 o'clock, and the heating capacity marked as 17 o'clock is Q18), 18 o'clock-Q19 (indicates the heat that can be output from 18 o'clock to 19 o'clock, and the heating capacity marked as 18 o'clock is Q19), 19 o'clock-Q20 (indicates the heat that can be output from 19 o'clock to 20 o'clock, and the heating capacity marked as 19 o'clock is Q20), 20 o'clock-Q21 (indicates the heat that can be output from 20 o'clock to 21 o'clock, and the heating capacity marked as 20 o'clock is Q21), 21 o'clock-Q22 (indicates the heat that can be output from 21 o'clock to 22 o'clock,The heating capacity marked as 21 is Q22), 22-Q23 (indicates the heat output from 22 to 23, the heating capacity marked as 22 is Q23), 23-Q24 (indicates the heat output from 23 to 24, the heating capacity marked as 23 is Q24).

[0041] In some embodiments, the corresponding relationship between the heating capacity and time of the air source heat pump water heater is as follows: the heating capacity distribution curve is as follows: Figure 4 In other words, the corresponding relationship between the heating capacity of the unit and time is expressed in the form of a relationship curve, similar to the temperature-time curve of the current 24-hour weather forecast, such as Figure 5 shown.

[0042] Of course, the correspondence between the unit's heating capacity and time can also be expressed in other forms, such as in the form of a mapping table. In one example, the heating capacity represents the heating power of the unit. The set duration is 24 hours, the start time of the set duration is 0, and the time period length is 1 hour. When the computer group can output heat at different times, the heating power × time period length (1 hour) can be used. The mapping table of time, ambient temperature, and the unit's heating capacity is as follows:

[0043] According to the above mapping table, the ambient temperature distribution curve can be obtained (such as Figure 5 As shown, the horizontal axis represents time and the vertical axis represents ambient temperature) and the heating capacity distribution curve of the unit (such as Figure 4 As shown, the horizontal axis represents time and the vertical axis represents the heating capacity of the unit). Of course, in the above mapping table, if the heating capacity represents the amount of heat that the unit can output, the unit is kW·h.

[0044] In some embodiments, determining the correspondence between the heating capacity of the air source heat pump water heater and time includes: determining the correspondence between the heating capacity of the air source heat pump water heater and time according to a preset time-temperature-heating capacity correspondence.

[0045] In other words, the unit has a built-in correspondence between time, temperature and heating capacity, which can be directly called. This correspondence can be obtained by fitting the weather data of previous years. For example: according to the weather data of the same day and time in the past several years, the correspondence between time and ambient temperature at that time of the day can be obtained by fitting (such as taking the average value); the correspondence between time and ambient temperature at other times of the day can be obtained by the same method, and the correspondence between time and ambient temperature of the day can be obtained; the correspondence between time and ambient temperature of other days can be obtained by the same method, and then the correspondence between time and ambient temperature of different days of the year can be obtained.

[0046] By adopting this method, the unit does not need to be connected to the Internet, and the networking module can be omitted, which is beneficial to reducing production costs, reducing the calculation amount of the unit, and simplifying the electronic control program.

[0047] In other embodiments, determining the correspondence between the heating capacity of the air source heat pump water heater and time includes: determining the correspondence between the heating capacity of the air source heat pump water heater and time based on the correspondence between time, temperature and heating capacity calculated based on weather data obtained from the cloud.

[0048] In other words, the unit needs to obtain weather data from the cloud to get the correspondence between time and ambient temperature, and then indirectly obtain the correspondence between the unit's heating capacity and time based on the calibrated correspondence between ambient temperature and heating capacity.

[0049] The ambient temperature determined by this method is the real-time temperature, which is more accurate. Therefore, the correspondence between the heating capacity of the unit and time is more accurate and the error is small, which is conducive to better balancing the water demand of end users and the energy saving of the air source heat pump water heater unit.

[0050] In some embodiments, step S104 includes: calculating the heat Q required to heat the water in the water tank to the target heating temperature according to the formula Q=C×V×ρ×h%×(Ts-T5).

[0051] Where C is the specific heat capacity of water, in J / (kg·℃); V is the capacity of the water tank, in m 3 ; ρ is the density of water, in kg / m 3 ; h% is the current water level of the water tank, which is a dimensionless number, 0<h≤100; Ts is the target heating temperature, in °C; T5 is the current water temperature in the water tank, in °C. The current water level of the water tank can be detected by the water level sensor and expressed as a percentage of the rated water level. The current water temperature in the water tank can be detected by the temperature sensor.

[0052] Among them, for household air source heat pump hot water units, the capacity of the water tank is fixed and is installed together with the unit at the factory, so the capacity V of the water tank can be built into the unit and directly called.

[0053] For commercial air source heat pump water heaters, since the same model of unit can be equipped with water tanks of different volumes, users can choose water tanks of different volumes according to their needs, and can also replace water tanks of different volumes during subsequent use, so the actual water consumption is unknown. Therefore, the capacity V of the water tank needs to be input by the user.

[0054] Therefore, in some embodiments, the air source heat pump water heater is a commercial air source heat pump water heater, and the control method further includes: determining the capacity V of the water tank before calculating the heat Q required to heat the water in the water tank to the target heating temperature.

[0055] The user can input the capacity of the water tank through a wired controller, a remote controller, an operation panel, or a terminal device (such as a mobile phone APP), and the control device can determine the capacity V of the water tank based on the water tank capacity input by the user.

[0056] In some embodiments, the air source heat pump water heater unit is a fixed speed unit, the frequency of the unit remains unchanged, and the heating capacity is only related to the ambient temperature.

[0057] like Figure 2 As shown, the target heating time period is determined according to the corresponding relationship between the heating capacity and the time, including: According to the corresponding relationship between heating capacity and time, the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times within the set time is determined, where n = the number of equal-length time periods included in the set time, and the set time is greater than or equal to the interval between the current time and the water use time; Based on the continuous time period ≥Q and the water usage time is met, select the one that meets ≥Q and all the shortest continuous time periods that meet the water use time, where 1≤m≤k≤n; The average heating capacity of each shortest continuous time period is calculated, and the shortest continuous time period with the largest average heating capacity is selected as the target heating time period.

[0058] Based on the absence of continuous time periods satisfying ≥Q and the water usage time is met, the current time is taken as the starting time, the time when the target heating temperature is reached is taken as the ending time, and the time period between the starting time and the ending time is taken as the target heating time period.

[0059] in, = (Qm+…+Qk)≥Q, 1≤m≤k≤n. When the heating capacity represents the amount of heat that the unit can output, Qi can be directly obtained by querying the corresponding relationship between the heating capacity of the unit and time. When the heating capacity represents the heating power of the unit, Wi can be first obtained by querying the corresponding relationship between the heating capacity of the unit and time, and then Qi can be calculated by using Wi×time period length.

[0060] In other words, first determine the heating capacity of the unit at different times based on the corresponding relationship between the unit's heating capacity and time. Then, calculate whether the total heat output in a continuous time period can meet the target heating demand (i.e., meet the ≥Q), and the continuous time period is between the current time and the scheduled water use time (i.e., the water use time is met). When the above two conditions are met, it means that the water in the water tank is heated to the target heating temperature before the scheduled water use time to meet the user's water demand. Among them, k and m can be equal, so the continuous time period can also be a single time period Qm.

[0061] However, in order to meet the energy-saving requirements, all continuous time periods that meet the above two conditions must be screened to select the shortest continuous time period that meets the above two conditions, so that the initial moments and / or end moments of any two shortest continuous time periods are different. Because the initial moments or end moments of any two continuous time periods are the same, there will be a situation where one time is long and the other is short, and the time period combination with a long total heating time is not conducive to energy saving, and is not the shortest continuous time period that meets the heat requirements, so it needs to be eliminated. For example: Q1+Q2≥Q, Q1+Q2+Q3≥Q, Q1+Q2+Q3+Q4≥Q, Q2+Q3≥Q, Q2+Q3+Q4≥Q, Q3+Q4≥Q, and the above six continuous time periods all meet the water use time, then the continuous time period corresponding to Q1+Q2, the continuous time period corresponding to Q2+Q3, and the continuous time period corresponding to Q3+Q4 are the shortest continuous time periods, and the continuous time period corresponding to Q1+Q2+Q3, the continuous time period corresponding to Q2+Q3+Q4, and the continuous time period corresponding to Q1+Q2+Q3+Q4 are eliminated. This is to achieve energy saving while meeting the terminal water demand.

[0062] The process of determining the shortest continuous time period that meets the above two conditions may be to first calculate all continuous time periods that meet the above two conditions and then perform elimination and screening.

[0063] Alternatively, the screening can be performed simultaneously during the calculation process. For example, first use the time period corresponding to Q1 as the starting time period to determine the shortest continuous time period that meets the above two conditions (recorded as the first shortest continuous time period), that is, ≥Q and meets the water use time, and k is the smallest. Then use the time period corresponding to Q2 as the starting time period to make a judgment, and find the shortest continuous time period that meets the above two conditions (recorded as the second shortest continuous time period), that is, ≥Q and meets the water use time, and k is the smallest, and judge whether the second shortest continuous time period is the same as the end time of the first shortest continuous time period (that is, whether k is the same). If so, remove the first shortest continuous time period. Then use the time period corresponding to Q3 as the starting time period to judge, and find the shortest continuous time period that meets the above two conditions (recorded as the third shortest continuous time period), that is, satisfy ≥Q and meets the water use time, and k is the smallest, and judge whether the end time of the third shortest continuous time period is the same as the shortest continuous time period (i.e., the first shortest continuous time period or the second shortest continuous time period) determined before (i.e., whether k is the same). If so, remove the shortest continuous time period with the same end time (i.e., the first shortest continuous time period or the second shortest continuous time period). By analogy, all the shortest continuous time periods that meet the above two conditions can be found.

[0064] Then, the average heating capacity of each shortest continuous time period is calculated. The shortest continuous time period with the largest average heating capacity has the highest energy efficiency. Therefore, the shortest continuous time period with the largest average heating capacity is used as the target heating time period, which is most conducive to energy saving. Average heating capacity = ( ) / (k-m+1), that is, the sum of the heating capacities of the shortest continuous time period / the number of time periods included in the shortest continuous time period.

[0065] Among them, whether the above two conditions (meeting the target heating heat demand and meeting the water use time) are met can be carried out in two steps. First, find all the shortest continuous time periods that meet the target heating heat demand within the set time, and then find the shortest continuous time period that meets the water use time.

[0066] Alternatively, the above two conditions (satisfying the target heating heat demand and meeting the water use time) can also be performed in one step. In the process of finding all the shortest continuous time periods that meet the target heating heat demand, only the time period between the current moment and the water use time can be calculated and screened, that is, only the time period when Qi is between the current moment and the water use time can be screened to find all the shortest continuous time periods that meet the target heating heat demand, that is, all the shortest continuous time periods that meet the above two conditions.

[0067] Of course, sometimes the scheduled water use time is close to the current time, or it may be found through calculation that there is no continuous time period that meets the above two conditions. In this case, heating will start directly from the current time and continue until the water temperature in the water tank reaches the target heating temperature, in order to increase the water temperature in the water tank as soon as possible and give priority to ensuring the user's water demand.

[0068] In other embodiments, the air source heat pump water heater is a variable frequency unit, which has a set high energy efficiency working frequency interval, and the set high energy efficiency working frequency interval is divided into a plurality of different frequency bands. The corresponding relationship between heating capacity and time includes the corresponding relationship between heating capacity and time of a plurality of different frequency bands.

[0069] The control method further includes: determining the frequency band level corresponding to the target heating time period as the target frequency band level.

[0070] Controlling the air source heat pump water heater to heat in a target heating time period includes: controlling the air source heat pump water heater to heat in a target heating time period at a target frequency band.

[0071] For variable frequency units, air source heat pump water heater units can adjust the frequency, and the frequency also affects the energy efficiency of the unit. When other conditions remain unchanged, the energy efficiency of variable frequency heat pump water heater units tends to increase first and then decrease as the frequency of the unit increases. At low frequency, the unit can be considered to be in a partial load operation state. Although the energy consumption is low, the output capacity is also low, resulting in low energy efficiency of the unit; at medium frequency, the unit can be considered to be in a rated load operation state, with high energy efficiency; at high frequency, the unit can be considered to be in a full load or high load operation state. Although the output capacity increases, it is also accompanied by an increase in energy consumption, so the energy efficiency is lower than that of the medium frequency, but the overall energy efficiency is still relatively high. Therefore, the variable frequency heat pump water heater unit can have a set high energy efficiency working frequency range, generally a medium and high frequency range (such as a high energy efficiency frequency range recommended by the manufacturer), and the specific frequency range can be determined according to different units. Variable frequency heat pump water heater units usually heat in a set high energy efficiency frequency range, and the set high energy efficiency frequency range can be divided into multiple different frequency bands. In the set high energy efficiency frequency range, the lower the frequency, the higher the energy efficiency of the variable frequency unit. Therefore, under the same ambient temperature, the heating capacity of the unit is different for different frequencies, so the corresponding relationship between the heating capacity and time of the variable frequency unit can include the corresponding relationship between the heating capacity and time of multiple different frequency bands and gears according to the different frequency bands and gears in the set high energy efficiency working frequency range.

[0072] Therefore, for variable frequency units, it is also necessary to determine the target frequency band and gear, and perform heating according to the target frequency band and gear and target heating time period, in order to make good use of the variable frequency of the air source heat pump water heater unit and better balance the terminal water demand and energy saving.

[0073] In some embodiments, the air source heat pump water heater unit is a variable frequency unit, such as Figure 3 As shown, the target heating time period is determined according to the corresponding relationship between the heating capacity and the time, including: According to the corresponding relationship between the heating capacity of the lowest frequency band and time, the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times within the set time is determined, where n = the number of equal-length time periods included in the set time, and the set time is greater than or equal to the interval between the current time and the water use time; Based on the corresponding relationship between the heating capacity of the lowest frequency band and time, it is determined that there is a continuous time period that meets ≥Q and the water usage time is met, select the one that meets ≥Q and all the shortest continuous time periods that meet the water use time, where 1≤m≤k≤n; Calculate the average heating capacity of each shortest continuous time period corresponding to the lowest frequency band, and select the shortest continuous time period with the largest average heating capacity as the target heating time period; Based on the corresponding relationship between the heating capacity and time of the lowest frequency band, it is determined that there is no continuous time period that meets the ≥Q and the water usage time is met, the target heating time period is determined according to the corresponding relationship between the heating capacity of the higher frequency band and time.

[0074] Among them, when the heating capacity represents the amount of heat that the unit can output, Qi can be directly obtained by querying the corresponding relationship between the heating capacity of the unit's lowest frequency band and time. When the heating capacity represents the heating power of the unit, Wi can be first obtained by querying the corresponding relationship between the heating capacity of the unit's lowest frequency band and time, and then Qi can be calculated using Wi×time period length.

[0075] In some embodiments, Figure 3 As shown, the target heating time period is determined according to the corresponding relationship between the heating capacity of the higher frequency band and time, including: According to the corresponding relationship between the heating capacity of the higher frequency band and time, the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times is determined; Based on the corresponding relationship between the heating capacity and time of the higher frequency band, it is determined that there is a continuous time period that meets ≥Q and the water usage time is met, select the one that meets ≥Q and all the shortest continuous time periods that meet the water use time, where 1≤m≤k≤n; Calculate the average heating capacity of each shortest continuous time period of the higher frequency band, and select the shortest continuous time period with the largest average heating capacity as the target heating time period; Based on the corresponding relationship between the heating capacity and time of the higher frequency band, it is determined that there is no continuous time period that meets the requirements. ≥Q and the water usage time is met, return to the step of determining the target heating time period according to the corresponding relationship between the heating capacity and time of the higher frequency band gear and correspondingly change the corresponding relationship between the heating capacity and time of the higher frequency band gear.

[0076] Among them, when the heating capacity represents the heat that the unit can output, Qi can be directly obtained by querying the corresponding relationship between the heating capacity of the unit's higher frequency band and time. When the heating capacity represents the heating power of the unit, Wi can be first obtained by querying the corresponding relationship between the heating capacity of the unit's higher frequency band and time, and then Qi can be calculated using Wi×time period length.

[0077] In some embodiments, Figure 3 As shown, the target heating time period is determined according to the corresponding relationship between the heating capacity of the higher frequency band and time, and also includes: Based on the corresponding relationship between the heating capacity of the highest frequency range and time, it is determined that there is no continuous time period that meets the ≥Q and the water usage time is met, the current time is taken as the starting time, the time when the target heating temperature is reached is taken as the ending time, and the time period between the starting time and the ending time is taken as the target heating time period.

[0078] As mentioned above, in the setting of high-efficiency frequency range, the lower the frequency, the higher the energy efficiency of the variable frequency unit, so priority is given to whether the lowest frequency gear (for example, recorded as gear one) can meet the target heating heat demand and water use time. If the lowest frequency gear can meet the target heating heat demand and water use time, the lowest frequency gear is used for heating to achieve better energy saving effect. Among them, for the lowest frequency gear (gear one), there may be multiple continuous time periods that can meet the above two conditions, and the most energy-saving target heating time period must be screened out. Therefore, for the lowest frequency gear, it is also necessary to calculate and screen according to the logic of the fixed frequency unit, and screen out the shortest continuous time period that meets the above two conditions and has the largest average heating capacity as the target heating time period. As for the specific calculation and screening process, please refer to the process of the fixed frequency unit, which will not be repeated here.

[0079] If the lowest frequency gear (level 1) cannot meet the target heating heat demand and water usage time, it is necessary to consider increasing the frequency to improve the output capacity, preferably to meet the water demand of the end user. Therefore, it is necessary to determine the target heating time period based on the corresponding relationship between the heating capacity and time of the higher frequency gear.

[0080] If the higher frequency band gear (for example, marked as gear 2) can meet the target heating heat demand and water usage time, the higher frequency band gear (gear 2) will be used for heating first, so as to meet the water demand of the end user and take into account the energy saving effect. Among them, for the higher frequency band gear (gear 2), there may be multiple continuous time periods that can meet the above two conditions, and the most energy-saving target heating time period must be screened out. Therefore, for the higher frequency band gear (gear 2), it is also necessary to calculate and screen according to the logic of the fixed-frequency unit, and screen out the shortest continuous time period that meets the above two conditions and has the largest average heating capacity as the target heating time period. As for the specific calculation and screening process, please refer to the process of the fixed-frequency unit, which will not be repeated here.

[0081] If the higher frequency gear (gear 2) cannot meet the target heating heat demand and water usage time, it is necessary to consider further increasing the frequency gear to improve the output capacity, preferably to meet the water demand of the end user. Therefore, it is necessary to determine the target heating time period based on the correspondence between the heating capacity and time of the higher frequency gear (for example, gear 3). Therefore, return to execute the step of determining the target heating time period based on the correspondence between the heating capacity and time of the higher frequency gear (gear 3), and change the correspondence between the heating capacity and time of the higher frequency gear (gear 3) accordingly.

[0082] If a higher frequency band gear (for example, grade three) can meet the target heating heat demand and water usage time, the higher frequency band gear (grade three) will be used for heating first, so as to meet the water demand of the end user and take into account the energy saving effect. Among them, for a higher frequency band gear, there may be multiple continuous time periods that can meet the above two conditions, and the most energy-saving target heating time period must be screened out. Therefore, for a higher frequency band gear (grade three), it is also necessary to calculate and screen according to the logic of the fixed-frequency unit, and screen out the shortest continuous time period that meets the above two conditions and has the largest average heating capacity as the target heating time period. As for the specific calculation and screening process, please refer to the process of the fixed-frequency unit, which will not be repeated here.

[0083] If the higher frequency gear (gear three) cannot meet the target heating heat demand and water usage time, it is necessary to consider further increasing the frequency gear to improve the output capacity, preferably to meet the water demand of the end user. Therefore, it is necessary to determine the target heating time period based on the correspondence between the heating capacity and time of the higher frequency gear (for example, gear four). Therefore, return to the step of determining the target heating time period based on the correspondence between the heating capacity and time of the higher frequency gear (gear four), and change the correspondence between the heating capacity and time of the higher frequency gear (gear four) accordingly.

[0084] And so on, until the frequency band that can meet the target heating heat demand and water usage time is found, and the shortest continuous time period that meets the above two conditions is found as the target heating time period.

[0085] However, if the highest frequency gear still cannot meet the target heating heat demand and water usage time, heating will start directly at the highest frequency gear from the current time and continue heating until the water temperature in the water tank reaches the target heating temperature, so as to increase the water temperature in the water tank as soon as possible and give priority to ensuring the user's water demand.

[0086] In some embodiments, for the variable frequency unit, each frequency band position may correspond to a fixed frequency value or a combination of multiple frequency values ​​within the corresponding set frequency range. Since the ambient temperature is variable, different frequency values ​​may correspond to the same frequency band position for different ambient temperatures in order to achieve better energy saving effects.

[0087] In one embodiment, the correspondence between heating capacity and time includes the correspondence between heating capacity and time of two different frequency ranges, which are respectively recorded as the correspondence between heating capacity and time of low frequency range and the correspondence between heating capacity and time of high frequency range. When the unit is heated at low frequency range, it can be recorded as energy-saving mode. When the unit is heated at high frequency range, it can be recorded as rapid heating mode.

[0088] The target heating time period is determined according to the corresponding relationship between heating capacity and time, including: According to the corresponding relationship between the heating capacity of the low-frequency gear and time, the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times is determined; Based on the corresponding relationship between the heating capacity of the low-frequency gear and time, it is determined that there is a continuous time period that meets ≥Q and the water usage time is met, select the one that meets ≥Q and all the shortest continuous time periods that meet the water use time, where 1≤m≤k≤n; Calculate the average heating capacity of each shortest continuous time period corresponding to the low-frequency gear, and select the shortest continuous time period with the largest average heating capacity as the target heating time period; Based on the corresponding relationship between the heating capacity of the low-frequency gear and time, it is determined that there is no continuous time period that meets the ≥Q and the water use time is met, the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times is determined according to the corresponding relationship between the heating capacity of the high-frequency gear and time; Based on the corresponding relationship between the heating capacity of the high-frequency gear and time, it is determined that there is a continuous time period that meets ≥Q and the water usage time is met, select the one that meets ≥Q and all the shortest continuous time periods that meet the water use time, where 1≤m≤k≤n; Calculate the average heating capacity of each shortest continuous time period of the high-frequency gear, and select the shortest continuous time period with the largest average heating capacity as the target heating time period; Based on the corresponding relationship between the heating capacity of the high-frequency gear and time, it is determined that there is no continuous time period that meets ≥Q and the water usage time is met, the current time is taken as the starting time, the time when the target heating temperature is reached is taken as the ending time, and the time period between the starting time and the ending time is taken as the target heating time period.

[0089] In other embodiments, the low frequency gear can be divided into multiple frequency band gears, and the energy-saving mode can be divided into a primary energy-saving mode, a secondary energy-saving mode, etc. Similarly, the high frequency gear can be divided into multiple frequency band gears, and the energy-saving mode can be divided into a primary energy-saving mode, a secondary energy-saving mode, etc.

[0090] During the calculation and screening process, the frequency bands are calculated and screened from low to high until the frequency bands that meet the above two conditions are screened out and the target heating time period is determined. Otherwise, heating will start from the current moment at the highest frequency band to increase the water temperature of the water tank as quickly as possible and give priority to meeting the water needs of end users.

[0091] In some embodiments, the control method further includes: based on the water in the water tank being heated to the target heating temperature, controlling the air source heat pump water heater unit to enter a heat preservation mode.

[0092] In other words, when the water in the water tank is heated to the target heating temperature, the unit enters the insulation mode. In this way, when the total heat that can be provided in the target heating time period is too much, the heating can be stopped in advance and the insulation mode can be entered. On the basis of meeting the user's water demand, energy saving can be achieved, and the heat shortage caused by insulation loss can be avoided, ensuring that users can use hot water at the required temperature.

[0093] In some embodiments, in keep warm mode: Based on the water temperature in the water tank dropping to the set lower limit, the air source heat pump water heater is controlled to start heating; Based on the water level in the water tank rising to the set upper limit value, the air source heat pump hot water unit is controlled to stop heating.

[0094] Among them, the lower limit value is set = target heating temperature - first set temperature difference, and the upper limit value is set = target heating temperature + second set temperature difference. The first set temperature difference and the second set temperature difference can be equal or unequal. The first set temperature difference and the second set temperature difference can be reasonably set as needed, such as 3°C, 5°C, 7°C, etc.

[0095] An embodiment of the present application also provides a control device, including a processor and a memory storing a computer program. When the processor executes the computer program, the steps of the control method in any of the above embodiments are implemented, and thus all the above-mentioned beneficial effects are achieved, which will not be repeated here.

[0096] The processor may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0097] The embodiment of the present application also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the steps of the control method in any of the above embodiments are implemented, thereby having all the above-mentioned beneficial effects, which will not be repeated here.

[0098] The embodiment of the present application also provides an air source heat pump water heater unit, including the control device of the above embodiment, and thus has all the above beneficial effects, which will not be repeated here.

[0099] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0100] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0101] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0102] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0103] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0104] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

[0105] In any one or more of the above exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on a computer-readable medium or transmitted via a computer-readable medium as one or more instructions or codes, and executed by a hardware-based processing unit. A computer-readable medium may include a computer-readable storage medium corresponding to a tangible medium such as a data storage medium, or a communication medium that facilitates a computer program, such as any medium transmitted from one place to another according to a communication protocol. In this way, a computer-readable medium may generally correspond to a non-temporary tangible computer-readable storage medium or a communication medium such as a signal or carrier wave. A data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and / or data structures for implementing the technology described in the present disclosure. A computer program product may include a computer-readable medium.

[0106] By way of example and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, flash memory, or any other medium that can be used to store the desired program code in the form of instructions or data structures and can be accessed by a computer. Moreover, any connection may also be referred to as a computer-readable medium. For example, if instructions are transmitted from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio and microwave, then coaxial cable, fiber optic cable, double-stripe line, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of medium. However, it should be understood that computer-readable storage media and data storage media do not include connections, carriers, signals, or other transient (transient) media, but are directed to non-transient tangible storage media. As used herein, disks and optical disks include compact disks (CDs), laser optical disks, optical optical disks, digital versatile disks (DVDs), floppy disks, or Blu-ray disks, etc., where disks typically reproduce data magnetically, and optical disks use lasers to reproduce data optically. Combinations of the above should also be included within the scope of computer-readable media.

[0107] For example, instructions may be executed by one or more processors such as one or more digital signal processors (DSPs), general-purpose microprocessors, application-specific integrated circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuits. Therefore, the term "processor" as used herein may refer to any of the above structures or any other structures suitable for implementing the techniques described herein. In addition, in some aspects, the functionality described herein may be provided in dedicated hardware and / or software modules configured for encoding and decoding, or incorporated in a combined codec. Furthermore, the techniques may be fully implemented in one or more circuits or logic elements.

[0108] The technical solutions of the embodiments of the present disclosure can be implemented in a wide variety of devices or equipment, including wireless mobile phones, integrated circuits (ICs) or a group of ICs (e.g., chipsets). Various components, modules or units are described in the embodiments of the present disclosure to emphasize the functional aspects of the devices configured to perform the described technologies, but they do not necessarily need to be implemented by different hardware units. Instead, as described above, the various units can be combined in a codec hardware unit or provided by a collection of interoperable hardware units (including one or more processors as described above) in combination with appropriate software and / or firmware.

Claims

1. A control method for an air source heat pump water heater unit, characterized in that: The control method comprises: Determine the target heating temperature and water use time; Calculate the heat Q required to heat the water in the water tank to the target heating temperature; Determine the corresponding relationship between the heating capacity and time of the air source heat pump water heater unit; Determining a target heating time period according to the corresponding relationship between the heating capacity and time; The air source heat pump water heater is controlled to perform heating in the target heating time period.

2. The control method according to claim 1, characterized in that: The air source heat pump water heater unit is a fixed speed unit, and the target heating time period is determined according to the corresponding relationship between the heating capacity and time, including: Determine the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times within the set time according to the corresponding relationship between the heating capacity and time, wherein n=the number of equal-length time periods included in the set time, and the set time is greater than or equal to the interval between the current time and the water use time; Based on the continuous time period ≥Q and meet the water use time, select the one that meets ≥Q and satisfy all the shortest continuous time periods of the water use time, where 1≤m≤k≤n; The average heating capacity of each of the shortest continuous time periods is calculated, and the shortest continuous time period with the largest average heating capacity is selected as the target heating time period.

3. The control method according to claim 2, characterized in that: The determining the target heating time period according to the corresponding relationship between the heating capacity and time also includes: Based on the absence of continuous time periods satisfying ≥Q and the water use time is met, the current time is taken as the starting time, the time when the target heating temperature is reached is taken as the ending time, and the time period between the starting time and the ending time is taken as the target heating time period.

4. The control method according to claim 1, characterized in that: The air source heat pump water heater unit is a variable frequency unit, the variable frequency unit has a set high energy efficiency working frequency interval, the set high energy efficiency working frequency interval is divided into a plurality of different frequency bands, and the corresponding relationship between the heating capacity and time includes the corresponding relationship between the heating capacity and time of the plurality of different frequency bands; The control method further includes: determining the frequency band level corresponding to the target heating time period as the target frequency band level; The controlling the air source heat pump water heater to perform heating in the target heating time period includes: controlling the air source heat pump water heater to perform heating in the target heating time period at the target frequency band gear.

5. The control method according to claim 4, characterized in that: The determining the target heating time period according to the corresponding relationship between the heating capacity and time includes: According to the corresponding relationship between the heating capacity of the lowest frequency band and time, the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times within the set time is determined, wherein n = the number of equal-length time periods included in the set time, and the set time is greater than or equal to the interval between the current time and the water use time; Based on the corresponding relationship between the heating capacity of the lowest frequency band and time, it is determined that there is a continuous time period that meets ≥Q and meet the water use time, select the one that meets ≥Q and satisfy all the shortest continuous time periods of the water use time, where 1≤m≤k≤n; Calculate the average heating capacity of each of the shortest continuous time periods corresponding to the lowest frequency band, and select the shortest continuous time period with the largest average heating capacity as the target heating time period; Based on the corresponding relationship between the heating capacity and time according to the lowest frequency range, it is determined that there is no continuous time period that satisfies ≥Q and the water usage time is met, the target heating time period is determined according to the corresponding relationship between the heating capacity of the higher frequency band and time.

6. The control method according to claim 5, characterized in that: The step of determining the target heating time period according to the corresponding relationship between the heating capacity of the higher frequency band and time includes: Determine the heat Q1, Q2, ..., Qn that the air source heat pump water heater can output at different times according to the corresponding relationship between the heating capacity of the higher frequency band and time; Based on the corresponding relationship between the heating capacity of the higher frequency band and time, it is determined that there is a continuous time period that meets ≥Q and meet the water use time, select the one that meets ≥Q and satisfy all the shortest continuous time periods of the water use time, where 1≤m≤k≤n; Calculate the average heating capacity of each of the shortest continuous time periods at a higher frequency band, and select the shortest continuous time period with the largest average heating capacity as the target heating time period; Based on the corresponding relationship between the heating capacity and time of the higher frequency band, it is determined that there is no continuous time period that meets the requirements. ≥Q and the water usage time is met, return to execute the step of determining the target heating time period according to the correspondence between the heating capacity and time of the higher frequency band gear and correspondingly change the correspondence between the heating capacity and time of the higher frequency band gear.

7. The control method according to claim 6, characterized in that: The step of determining the target heating time period according to the corresponding relationship between the heating capacity of the higher frequency band and time also includes: Based on the corresponding relationship between the heating capacity and time according to the highest frequency range, it is determined that there is no continuous time period that satisfies ≥Q and the water use time is met, the current time is taken as the starting time, the time when the target heating temperature is reached is taken as the ending time, and the time period between the starting time and the ending time is taken as the target heating time period.

8. The control method according to any one of claims 2, 3, 5 to 7, characterized in that: The set duration = 24h; The starting time of the set duration is a fixed time; or, the starting time of the set duration is the current time; or, the starting time of the set duration is the time corresponding to the set duration pushed forward by the water use time.

9. The control method according to any one of claims 1 to 7, characterized in that: The corresponding relationship between the heating capacity and time of the air source heat pump water heater unit is: a heating capacity distribution curve.

10. The control method according to any one of claims 1 to 7, characterized in that: The determining of the corresponding relationship between the heating capacity of the air source heat pump water heater and time includes: Determine the corresponding relationship between the heating capacity and time of the air source heat pump water heater unit according to the preset corresponding relationship between time, ambient temperature and heating capacity; Alternatively, the corresponding relationship between the heating capacity and time of the air source heat pump water heater unit is determined according to the corresponding relationship between time, ambient temperature and heating capacity calculated from weather data obtained from the cloud.

11. The control method according to any one of claims 1 to 7, characterized in that: The calculation of the heat Q required to heat the water in the water tank to the target heating temperature includes: According to the formula Q=C×V×ρ×h%×(Ts-T5), calculate the heat Q required to heat the water in the water tank to the target heating temperature; where C is the specific heat capacity of water, in J / (kg·℃); V is the capacity of the water tank, in m 3 ; ρ is the density of water, in kg / m 3 ; h% is the current water level of the water tank, which is a dimensionless number, 0<h≤100; Ts is the target heating temperature, in °C; T5 is the current water temperature of the water tank, in °C.

12. The control method according to any one of claims 1 to 7, characterized in that: The air source heat pump water heater is a commercial air source heat pump water heater. The control method further includes: determining the capacity V of the water tank before calculating the heat Q required to heat the water in the water tank to the target heating temperature.

13. The control method according to any one of claims 1 to 7, characterized in that: Also includes: Based on the water in the water tank being heated to the target heating temperature, the air source heat pump water heater unit is controlled to enter a heat preservation mode.

14. A control device, characterized in that: The system comprises a processor and a memory storing a computer program, wherein when the processor executes the computer program, the steps of the control method according to any one of claims 1 to 13 are implemented.

15. An air source heat pump water heater unit, characterized in that: Comprising a control device as claimed in claim 14.

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