Heat pump unit return water temperature adjustment method and device

Abstract

The present disclosure relates to a method and device for adjusting the return water temperature of a heat pump unit. The method includes: determining a plurality of target data of the heat pump unit during a target operation period, where the heat pump unit is used for heating a building; determining a numerical value of the periodic operation characteristics of the target operation period according to the plurality of target data, where the periodic operation characteristics are used to characterize the operation state of the heat pump unit and the heating state of the building; determining the category corresponding to the target operation period and the regulation criterion value of the category according to the numerical value of the periodic operation characteristics; and adjusting the return water temperature set value according to the regulation criterion value when the return water temperature adjustment condition is satisfied, where the return water temperature set value is used to adjust the return water temperature of the heat pump unit in the next operation period. According to the embodiments of the present disclosure, the return water temperature set value of the heat pump unit can be automatically adjusted to reasonably adjust the heat supply of the air source heat pump, improve the operation efficiency of the heat pump unit and reduce energy consumption.

Description

Technical Field

[0001] The present disclosure relates to the field of heating, and in particular, to a method and device for adjusting the return water temperature of a heat pump unit. Background Art

[0002] An air source heat pump is an efficient, environmentally friendly and energy-saving heating device. Based on the reverse Carnot cycle principle, this device can extract heat from the outdoor low-temperature air and use the heat for building heating.

[0003] How to automatically adjust the set value of the return water temperature of the heat pump unit according to the actual heat demand of the building to reasonably adjust the heat supply of the air source heat pump has become an urgent problem to be solved. Summary of the Invention

[0004] In view of this, the present disclosure provides a method and device for adjusting the return water temperature of a heat pump unit.

[0005] According to one aspect of the present disclosure, a method for adjusting the return water temperature of a heat pump unit is provided, including:

[0006] Determining a plurality of target data of the heat pump unit within a target operation period, where the heat pump unit is used for heating a building;

[0007] Determining a numerical value of the periodic operation characteristics of the target operation period according to the plurality of target data, where the periodic operation characteristics are used to characterize the operation state of the heat pump unit and the heating state of the building;

[0008] Determining the category corresponding to the target operation period and the regulation criterion value of the category according to the numerical value of the periodic operation characteristics;

[0009] When the return water temperature adjustment condition is satisfied, adjusting the set value of the return water temperature according to the regulation criterion value, where the set value of the return water temperature is used to control the working state of the heat pump unit.

[0010] In a possible implementation manner, the determining a plurality of target data of the heat pump unit within a target operation period includes:

[0011] Obtaining target data at a preset frequency, where the target data includes the start-stop information of the compressor of the heat pump unit;

[0012] Determining a reference operation period and a plurality of target data within the reference operation period according to the start-stop information, where the target data within the reference operation period is data verified through data;

[0013] Performing validity verification on the reference operation period. If the validity verification is passed, determining the plurality of target data within the reference operation period as the plurality of target data within the target operation period.

[0014] In a possible implementation, the target data includes at least one of ambient temperature, return water temperature of the heat pump unit, outlet water temperature of the heat pump unit, defrost status flag information of the heat pump unit, return water temperature set value, and return difference temperature set value of the heat pump unit.

[0015] In a possible implementation, the periodic operation characteristics include at least one of compressor start time, end time of compressor off state, time when the return water temperature of the heat pump unit reaches the peak after the compressor is turned off, time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off, compressor off time, cycle start time, cycle end time, average ambient temperature within the cycle, average ambient temperature during the compressor on period, characteristic ambient temperature, total cycle duration, compressor on duration within the cycle, compressor off duration within the cycle, total cycle start and stop duration, return water temperature set value, characteristic heat consumption duration, characteristic heat supply number, characteristic temperature accumulation, characteristic temperature rise rate, unit characteristic heat production, unit characteristic heat loss, and average heat production temperature difference.

[0016] Among them, the characteristic ambient temperature is a characteristic parameter used to classify the level of outdoor ambient temperature. The characteristic heat consumption duration is used to characterize the rate of heat consumption of the remaining heat in the pipeline during the compressor off period of the heat pump heating system. The characteristic heat supply number is used to characterize the cumulative change information of the supply and return water temperature difference of the heat pump unit within the target operation cycle. The characteristic temperature accumulation is used to characterize the cumulative change of the difference between the supply water temperature and the set return difference temperature of the heat pump unit within the target operation cycle. The characteristic temperature rise rate is used to characterize the rate of increase in the supply water temperature of the heat pump unit within the target operation cycle. The unit characteristic heat production is used to characterize the average value of the supply and return water temperature difference of the heat pump unit within the target operation cycle. The unit characteristic heat loss is used to characterize the relationship between the heat dissipation amount and the heat dissipation duration of the heat pump heating system during the compressor stop stage of the heat pump unit. The average heat production temperature difference is used to characterize the average value of the supply and return water temperature difference of the heat pump unit during the compressor on period.

[0017] In a possible implementation, determining the numerical value of the periodic operation characteristics of the target operation cycle according to the multiple target data includes:

[0018] If the periodic operation characteristics include the compressor start time, the (z - 1)-th start and stop moment is determined as the compressor start time;

[0019] If the periodic operation feature includes the end time of the compressor shutdown state, then determine the j-th moment as the end time, where the start-stop information at the (j - 1)-th moment and the j-th moment is both shutdown, and the start-stop information at the (j + 1)-th moment is startup; or determine the latest acquisition time of multiple target data of the target operation period as the end time;

[0020] If the periodic operation feature includes the time when the return water temperature of the heat pump unit reaches a peak value after the compressor is shut down, then determine all first target data that meet the return water temperature reversal criterion among the multiple target data, and determine the latest acquisition moment of all first target data as the time when the return water temperature of the heat pump unit reaches a peak value after the compressor is shut down, where the return water temperature reversal means that the change trend of the return water temperature changes;

[0021] If the periodic operation feature includes the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is shut down, then determine the latest acquisition time of multiple target data of the target operation period as the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is shut down;

[0022] If the periodic operation feature includes the compressor shutdown time, then determine the y-th moment as the compressor shutdown time, where the compressor is in the shutdown state at the y-th moment and the compressor is in the startup state at the (y - 1)-th moment;

[0023] If the periodic operation feature includes the start time of the period, then determine the (z - 1)-th start-stop moment as the start time of the period;

[0024] If the periodic operation feature includes the end time of the period, then determine the j-th moment as the end time of the period, where the start-stop information at the (j - 1)-th moment and the j-th moment is both shutdown, and the start-stop information at the (j + 1)-th moment is startup; or determine the latest acquisition time of multiple target data of the target operation period as the end time of the period;

[0025] If the periodic operation feature includes the average ambient temperature within the period, then determine the average ambient temperature according to the ambient temperature values of the multiple target data;

[0026] If the periodic operation feature includes the average ambient temperature during the compressor startup time period, then determine all second target data during the compressor startup time period from the multiple target data, and determine the average ambient temperature during the compressor startup time period according to the ambient temperature values of all second target data;

[0027] If the periodic operation feature includes the characteristic ambient temperature, then determine the average ambient temperature within the period, and determine the characteristic ambient temperature according to the average ambient temperature within the period and the graduation value of the characteristic ambient temperature;

[0028] If the periodic operation feature includes the total duration of a period, determine the start time and end time of the period, and determine the difference between the start time and end time of the period as the total duration of the period. Alternatively, determine the end time of the compressor off state and the start time of the compressor on state, and determine the difference between the end time of the compressor off state and the start time of the compressor on state as the total duration of the period;

[0029] If the periodic operation feature includes the duration of the compressor on within a period, determine the duration of the compressor on based on the difference between the compressor off time and the compressor on time, or the product of the number of compressor on times and the deviation of the acquisition time step;

[0030] If the periodic operation feature includes the duration of the compressor off within a period, determine it as the duration of the compressor off within the period based on the difference between the end time of the compressor off state and the compressor off time, or the product of the number of compressor off times and the deviation of the acquisition time step;

[0031] If the periodic operation feature includes the total duration of the compressor on and off within a period, determine the duration of the compressor on within the period and the duration of the compressor off within the period, and determine the sum of the duration of the compressor on within the period and the duration of the compressor off within the period as the total duration of the compressor on and off within the period;

[0032] If the periodic operation feature includes the set value of the return water temperature within a period, determine the set value of the return water temperature in the multiple target data as the set value of the return water temperature within the period;

[0033] If the periodic operation feature includes the characteristic heat consumption duration, determine the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor is turned off, and determine the difference between the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor is turned off as the characteristic heat consumption duration;

[0034] If the periodic operation feature includes the characteristic heat supply number, determine the characteristic heat supply number based on the return water temperature and the outlet water temperature of each target data in the multiple target data;

[0035] If the periodic operation feature includes the characteristic temperature accumulation, determine the characteristic temperature accumulation based on the outlet water temperature, the set value of the return water temperature, and the set value of the dead band temperature of each target data in the multiple target data;

[0036] If the periodic operation feature includes a characteristic temperature rise rate, determine the characteristic temperature rise rate according to the compressor start time, the water outlet temperature at the compressor start time, the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down, and the water outlet temperature at the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down;

[0037] If the periodic operation feature includes a unit characteristic heating capacity, determine the unit characteristic heating capacity according to the return water temperature, the water outlet temperature of each target data among the multiple target data, and the total duration of the period;

[0038] If the periodic operation feature includes a unit characteristic heat loss, determine the unit characteristic heat loss according to the return water temperature of each target data whose acquisition time is between the time when the return water temperature of the heat pump unit reaches the peak value after the compressor shuts down and the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down, and the time difference between the time when the return water temperature of the heat pump unit reaches the lowest value and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor shuts down;

[0039] If the periodic operation feature includes an average heating temperature difference, determine the average heating temperature difference according to the return water temperature, the water outlet temperature of each target data whose acquisition time is between the compressor start time and the compressor shutdown time, and the time difference between the compressor shutdown time and the compressor start time.

[0040] Among them, the (z - 1)-th start-stop moment is determined according to historical target data, z is an integer greater than 2, j is an integer greater than 2, and y is an integer greater than 2.

[0041] In a possible implementation, the category corresponding to the target operation period is determined according to the characteristic environmental temperature and the return water temperature. The periodic operation feature includes the characteristic environmental temperature and the return water temperature.

[0042] Among them, determining the category corresponding to the target operation period and the regulation criterion value of the category according to the value of the periodic operation feature includes:

[0043] Determine the category corresponding to the target operation period according to the characteristic environmental temperature value and the return water temperature set value at the current moment;

[0044] Update the regulation criterion value of the category according to the value of the periodic operation feature of the target operation period.

[0045] In a possible implementation, updating the regulation criterion value of the category according to the value of the periodic operation feature of the target operation period includes:

[0046] Determine the average value of each parameter according to the numerical value of the periodic operation characteristics and the historical numerical values of the parameters of the regulation criterion of the category.

[0047] Determine the regulation criterion value of the category according to the average value of each parameter.

[0048] Wherein, the parameters of the regulation criterion include at least one of characteristic heat consumption duration, characteristic heat supply number, characteristic temperature accumulation, characteristic temperature rise rate, unit characteristic heat production, unit characteristic heat loss, and average heat production temperature difference.

[0049] In a possible implementation manner, the return water temperature adjustment condition includes simultaneously satisfying a low-temperature protection criterion, a cycle duration criterion, a parameter adjustment interval criterion, and a defrost-free criterion.

[0050] In a possible implementation manner, the regulation criterion value includes a characteristic heat consumption duration criterion value.

[0051] Wherein, adjusting the return water temperature set value according to the regulation criterion value includes:

[0052] Respectively determine the periodic change amount of the moving average value of the characteristic heat supply number, the periodic change amount of the characteristic heat consumption duration, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value, and the periodic change amount of the unit characteristic heat production, wherein the periodic change amount is determined according to the numerical values of the current k-th target operation cycle and the (k - 1)-th target operation cycle, and m is an integer greater than 1.

[0053] When the periodic change amount of the moving average value of the characteristic heat consumption duration is less than 0, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value is less than 0, the periodic change amount of the characteristic heat supply number is greater than 0, and the periodic change amount of the unit characteristic heat production is greater than 0, determine the difference between the current return water temperature set value and the downward parameter adjustment increment value as the updated return water temperature set value.

[0054] When the periodic change amount of the moving average value of the characteristic heat consumption duration is greater than 0, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value is greater than 0, the periodic change amount of the characteristic heat supply number is less than 0, and the periodic change amount of the unit characteristic heat production is less than 0, determine the sum of the current return water temperature set value and the upward parameter adjustment increment value as the updated return water temperature set value.

[0055] According to another aspect of the present disclosure, there is provided a device for adjusting the return water temperature of a heat pump unit, including:

[0056] A first determination module, configured to determine a plurality of target data of the heat pump unit during a target operation cycle, where the heat pump unit is used to supply heat to a building.

[0057] A second determination module, configured to determine a numerical value of the periodic operation characteristics of the target operation period according to the multiple target data, where the periodic operation characteristics are used to characterize the operation state of the heat pump unit and the heating state of the building;

[0058] A third determination module, configured to determine the category corresponding to the target operation period and the regulation criterion value of the category according to the numerical value of the periodic operation characteristics;

[0059] An adjustment module, configured to adjust the set value of the return water temperature according to the regulation criterion value when the return water temperature adjustment condition is satisfied, where the set value of the return water temperature is used to control the working state of the heat pump unit.

[0060] According to another aspect of the present disclosure, there is provided an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein, the processor is configured to execute the above-mentioned heat pump unit return water temperature adjustment method.

[0061] According to another aspect of the present disclosure, there is provided a non-volatile computer-readable storage medium, on which computer program instructions are stored, wherein, when the computer program instructions are executed by a processor, the above-mentioned heat pump unit return water temperature adjustment method is implemented.

[0062] According to the embodiments of the present disclosure, it is possible to determine the numerical value of the periodic operation characteristics of a heat pump unit in a target operation period, determine the category corresponding to the target operation period and the regulation criterion value of the category, and adjust the set value of the return water temperature according to the regulation criterion value when the return water temperature adjustment condition is satisfied, so as to automatically adjust the set value of the return water temperature of the heat pump unit, thereby adjusting the heat supply of the air source heat pump, and further improving the operation efficiency of the heat pump unit and reducing energy consumption.

[0063] According to the following detailed description of exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present disclosure will become apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The drawings included in the specification and constituting a part of the specification illustrate exemplary embodiments, features, and aspects of the present disclosure together with the specification, and are used to explain the principles of the present disclosure.

[0065] Figure 1 FIG. shows a flowchart of a heat pump unit return water temperature adjustment method according to an embodiment of the present disclosure.

[0066] Figure 2 FIG. shows a flowchart of a heat pump unit return water temperature adjustment method according to an embodiment of the present disclosure.

[0067] Figure 3 FIG. shows a block diagram of a heat pump unit return water temperature adjustment device according to an embodiment of the present disclosure.

[0068] Figure 4 A block diagram of a return water temperature adjustment device for a heat pump unit according to an embodiment of the present disclosure is shown.

[0069] Figure 5 A block diagram of a return water temperature adjustment device for a heat pump unit according to an embodiment of the present disclosure is shown. Detailed implementation manners

[0070] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. Identical reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0071] The special term "exemplary" herein means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" herein need not be construed as superior to or better than other embodiments.

[0072] In addition, for a better description of the present disclosure, numerous specific details are given in the following detailed implementation manners. Those skilled in the art should understand that the present disclosure can also be implemented without some specific details. In some instances, methods, means, elements, and circuits well-known to those skilled in the art are not described in detail so as to highlight the gist of the present disclosure.

[0073] In the related art, an air source heat pump unit can achieve start-stop control of the compressor of the heat pump unit according to a certain set value of the return water temperature. However, the set value of the return water temperature of the heat pump unit needs to be given manually. Considering the situations such as the thermal inertia of the building itself, frequent changes in outdoor meteorological conditions, and indoor heat sources, in the absence of an automatic parameter adjustment strategy, manually setting the return water temperature cannot timely and accurately reflect the actual heat demand of the building.

[0074] In this way, there will frequently be situations of excessive heating or insufficient heating in the building, resulting in a series of problems such as low operating efficiency of the heat pump unit, high energy consumption, low energy efficiency ratio, and low heating comfort.

[0075] To solve the above problems, the present application provides a method for adjusting the return water temperature of a heat pump unit, which can describe and characterize the periodic operation law of the air source heat pump unit through the periodic operation characteristics of the air source heat pump unit. For example, based on the historical operation data of the heat pump unit, this method uses periodic operation characteristics of multiple different dimensions to characterize the periodic operation law of the heat pump unit, and can accurately feedback the operation state of the heat pump unit and the heat consumption state of the building without adding system measurement points or data acquisition equipment.

[0076] Moreover, based on the periodic operation characteristics of the air source heat pump unit, the return water temperature of the heat pump unit is automatically adjusted online. For example, by learning the parameter empirical values of the periodic operation characteristics of the heat pump unit under different classified operation conditions, a regulation criterion is established. Combining with the variation law of the periodic operation characteristics, the set value of the return water temperature of the heat pump unit is automatically adjusted to control the start and stop of the compressor of the heat pump unit, so as to realize the automatic regulation of the heat supply of the heat pump unit, match the heating temperature according to the actual heat demand of the building, and further achieve the purposes of improving the operation efficiency of the heat pump unit, improving the heating effect, reducing excessive heating, and reducing energy consumption.

[0077] Figure 1 The flowchart showing the method for adjusting the return water temperature of a heat pump unit according to an embodiment of the present disclosure is as follows. Figure 1 As shown, the method includes:

[0078] In step S11, a plurality of target data within a target operation cycle of the heat pump unit are determined, and the heat pump unit is used for heating a building;

[0079] In step S12, according to the plurality of target data, the value of the periodic operation characteristics of the target operation cycle is determined, wherein the periodic operation characteristics are used to characterize the operation state of the heat pump unit and the heating state of the building;

[0080] In step S13, according to the value of the periodic operation characteristics, the category corresponding to the target operation cycle and the regulation criterion value of the category are determined;

[0081] In step S14, when the return water temperature adjustment condition is satisfied, according to the regulation criterion value, the set value of the return water temperature is adjusted, and the set value of the return water temperature is used to control the working state of the heat pump unit.

[0082] According to the embodiments of the present disclosure, the value of the periodic operation characteristics of a heat pump unit within a target operation cycle can be determined, the category corresponding to the target operation cycle and the regulation criterion value of the category can be determined, and when the return water temperature adjustment condition is satisfied, according to the regulation criterion value, the set value of the return water temperature is adjusted to automatically adjust the set value of the return water temperature of the heat pump unit, so as to adjust the heat supply of the air source heat pump, and further improve the operation efficiency of the heat pump unit and reduce energy consumption.

[0083] It should be noted that the method for adjusting the return water temperature of the heat pump unit can be executed by any control module. This control module can be independent of the heat pump unit. For example, it can be any terminal device that can communicate with the heat pump unit, or can also be built into the heat pump unit or integrated in the controller of the heat pump unit. The present disclosure does not limit this.

[0084] Among them, when the control module is independent of the controller of the heat pump unit, the adjusted return water temperature set value can be transmitted to the controller supporting the heat pump unit, so as to realize the adjustment of the return water temperature set value of the heat pump unit and the function of automatically adjusting the heat supply amount without changing the original controller and control logic of the heat pump unit; achieving the purposes of improving the operation efficiency of the heat pump unit, improving the heating effect, reducing excessive heating, and reducing energy consumption.

[0085] Among them, the target operation period can be determined according to the operation state of the heat pump unit. For example, the time period between the first start-up and the next start-up of the heat pump unit compressor can be determined as a target operation period, and the present disclosure does not limit the determination method of the target operation period.

[0086] In a possible implementation manner, the target data can be any data related to the operation of the heat pump unit. For example, outdoor meteorological parameters and heat pump unit operation data, etc. For example, it can include at least one of the ambient temperature where the heat pump unit is located (for example, using the outdoor dry-bulb temperature), the return water temperature of the heat pump unit (or called the inlet water temperature, the water inlet temperature), the outlet water temperature of the heat pump unit, the defrost state flag information of the heat pump unit, the return water temperature set value, the start-stop information of the heat pump unit compressor, and the return difference temperature set value of the heat pump unit. The ambient temperature, return water temperature, outlet water temperature, return water temperature set value, and return difference temperature set value can all use the Celsius temperature scale, and the unit is degrees Celsius. The present disclosure does not limit the quantity and type of the target data.

[0087] Among them, the defrost state flag information of the heat pump unit can be used to represent whether the heat pump unit is in the defrost operation condition. For example, 0 means the heat pump unit is in the non-defrost state, and 1 means the heat pump unit is in the defrost state.

[0088] Among them, the return water temperature set value (or called the set return water temperature) can be used to control the working state of the heat pump unit. For example, it can represent the upper limit value of the return water temperature of the heat pump unit. When the heat pump unit compressor is in the on state and the return water temperature of the heat pump unit is greater than or equal to the return water temperature set value, the heat pump unit controller can turn off the heat pump unit compressor.

[0089] Among them, the start-stop information of the heat pump unit compressor can be used to represent whether the heat pump unit compressor is in the running or stopped state. For example, 0 can mean the compressor is in the off state, and 1 can mean the compressor is in the on state.

[0090] Among them, the return difference temperature set value of the heat pump unit can be used to represent the allowable change range of the return water temperature of the heat pump unit. For example, when the heat pump unit compressor is in the off state and the return water temperature of the heat pump unit is less than or equal to the difference between the return water temperature set value and the return difference temperature set value, the heat pump unit controller will turn on the compressor.

[0091] Among them, the periodic operation characteristics are used to characterize the operation state of the heat pump unit and the heating state of the building. The periodic operation characteristics can be one or more. For example, they can be the start time of the compressor of the heat pump unit, the end time of the shutdown state of the compressor, the time when the return water temperature of the heat pump unit reaches a peak after the compressor shuts down, etc. As long as they can be used to characterize the operation state of the heat pump unit or the heating state of the building, the present disclosure places no restrictions on the form and content of the periodic operation characteristics.

[0092] Among them, determining multiple target data of the heat pump unit within a target operation cycle can be to obtain the target data of the heat pump unit in real time. For example, obtain the target data according to a preset frequency, and determine a target operation cycle and the target data within this target operation cycle according to the preset frequency. For example, a target operation cycle can be determined according to the start-stop information of the compressor of the heat pump unit in the target data. It can also be to determine multiple target data within a target operation cycle when it is determined that the heat pump unit operates for a target operation cycle. For example, a target operation cycle can be determined according to a cycle start-stop flag, where the cycle start-stop flag can be used to characterize whether the acquisition time of the current target data is the start time or the stop time of the operation cycle of the heat pump unit. The present disclosure places no restrictions on this.

[0093] In a possible implementation manner, the determining multiple target data of the heat pump unit within a target operation cycle includes:

[0094] Obtain target data according to a preset frequency, where the target data includes the start-stop information of the compressor of the heat pump unit;

[0095] According to the start-stop information, determine a reference operation cycle and multiple target data within the reference operation cycle, where the target data within the reference operation cycle is data that has passed data verification;

[0096] Perform a validity check on the reference operation cycle. If the validity check is passed, determine the multiple target data within the reference operation cycle as the multiple target data within the target operation cycle.

[0097] For example, target data can be collected at a preset frequency, for example, at a fixed time interval. The time interval can be less than or equal to 5 minutes. The target data collected by the controller of the heat pump unit can be obtained. The target data includes the start-stop information of the compressor of the heat pump unit. As mentioned above, the start-stop information can be used to characterize whether the compressor of the heat pump unit is in an operating or stopped state, so that a reference operation cycle and multiple target data within the reference operation cycle can be determined according to the start-stop information. The target data within the reference operation cycle is data that has passed data verification.

[0098] In some alternative embodiments, target data can be acquired at a preset frequency and data verification can be performed on the target data to determine the target data within a reference operation cycle. It should be understood that there may also be target data that fails the data verification, and the target data within the reference operation cycle is the data that passes the data verification.

[0099] Among them, data verification can be used to judge the correctness, integrity, consistency, and continuity of the target data. Criteria for data verification can be set to perform data verification.

[0100] In a possible implementation manner, the target data acquired at the preset frequency is stored in a data table. For example, a relational database can be constructed, and this database includes a general table of historical data. Among them, the general table of historical data can be updated once when the target data is acquired, and one data record in the table can correspond to all the acquired target data. Among them, some of the target data can be the data acquired through the heat pump unit controller, and the remaining target data can be determined based on the acquired data. Data verification can be performed based on the data acquired through the heat pump unit controller. All the data records in the general table of historical data can be sorted in ascending order according to the sequence of data acquisition time.

[0101] Figure 2 The flowchart showing the method for adjusting the return water temperature of a heat pump unit according to an embodiment of the present disclosure is as follows. As Figure 2 shown, the fields of one data record in the general table of historical data can include: acquisition serial number, acquisition time, set return water temperature (or return water temperature set value), compressor status (or start-stop information of the compressor), cycle start-stop flag, unit defrost status (or defrost status flag information of the heat pump unit), return water temperature of the heat pump unit, heat pump outlet water temperature (or outlet water temperature of the heat pump unit), outdoor dry bulb temperature (or ambient temperature), acquisition success flag.

[0102] It should be noted that Figure 2 is a schematic diagram, and the relevant parameters of the embodiments of the present disclosure are only exemplarily shown and are not limited to Figure 2 the content shown.

[0103] Among them, the acquisition serial number can be used to indicate the sequence of a data record in all the data records of the general table of historical data according to the acquisition time.

[0104] [[ID=

[26] ]Among them, the acquisition time can be used to represent the acquisition time of a data record, and it can adopt the reference clock value of the heat pump unit controller. For example, the acquisition time recorded by the heat pump unit controller is assigned to the corresponding acquisition time field.

[0105] Among them, the cycle start / stop flag can be used to indicate whether the acquisition time of the current target data is the start time or the stop time of the target operation cycle of the heat pump unit. For example, when this field is 0, it can indicate that the acquisition time of the current data record is not the cycle start and stop time; when this field is 1, it can indicate that the acquisition time of the current data record is the cycle start and stop time.

[0106] Among them, the return water temperature reversal flag can be used to indicate whether the change trend of the return water temperature of the heat pump unit has reversed at the acquisition time of the current target data record. For example, when this field is 0, it can indicate that the change trend of the return water temperature of the heat pump unit has not reversed; when this field is 1, it can indicate that the change trend of the return water temperature of the heat pump unit has reversed.

[0107] Among them, the acquisition success flag can be used to identify whether the acquisition of a set of target data is successful. For example, when this field is 0, it can indicate acquisition failure; when this field is 1, it can indicate acquisition success.

[0108] In a possible implementation, data verification can be performed based on the data record corresponding to the current target data in the historical data summary table.

[0109] Exemplarily, if the data record corresponding to the current target data meets any one of the following three criteria, it can be determined that the current target data fails the data verification:

[0110] The data record contains at least one null value;

[0111] The data record contains at least one data that exceeds the range of its corresponding sensor;

[0112] The deviation between the difference in acquisition time between the data record and the previous data record and the acquisition time step is greater than the maximum allowable deviation.

[0113] For ease of understanding, taking the deviation of the acquisition time step Δt and the maximum allowable deviation Δt d as an example, when the following formula is satisfied, it indicates that the data record corresponding to the target data meets the criterion that the deviation between the difference in acquisition time between the data record and the previous data record and the acquisition time step is greater than the maximum allowable deviation, and the target data fails the data verification:

[0114] (T CO (i) - T CO (i - 1)) ≥ (Δt + Δt d )

[0115] Among them, i represents the serial number of the current data record in the historical data summary table; T CO (i) represents the acquisition time value of the i-th data record in the historical data summary table. Among them, Δtd The value can be set flexibly. For example, the default value can be 20 seconds.

[0116] It should be noted that the fields used for data verification in the data record do not include the fields that are set only after various determinations based on the operation data. For example, it does not include the acquisition success flag field S co , the cycle start and end flag field, etc. Taking the acquisition success flag field S co as an example, when it is determined that the current target data fails the data verification, the acquisition success flag of the corresponding data record in the historical data summary table can be set to 0. When it is determined that the current target data passes the data verification, the acquisition success flag can be set to 1.

[0117] In a possible implementation manner, determining the reference operation cycle and multiple target data within the reference operation cycle according to the start-stop information may include:

[0118] If the start-stop information is on at the current moment t and off at the moments t - 1 and t - 2, then determine that the moment t is the z-th start-stop moment;

[0119] Determine the (z - 1)-th start-stop moment, and the (z - 1)-th start-stop moment is determined according to the historical target data;

[0120] Determine the multiple target data from the (z - 1)-th start-stop moment to the z-th start-stop moment as the multiple target data within the reference operation cycle,

[0121] where t is an integer greater than 2, and z is an integer greater than 2.

[0122] As mentioned above, multiple target data within a target operation cycle can be stored in a cycle data table, and each target data corresponds to a data record. The (z - 1)-th start-stop moment can be determined according to the historical target data. For example, it is stored in the historical data summary table. Multiple target data from the (z - 1)-th start-stop moment to the z-th start-stop moment can be obtained from the historical data summary table and determined as the multiple target data within the reference operation cycle.

[0123] In a possible implementation manner, when determining a reference operation cycle, the cycle start and end flag of this data record can be set to 1 in the historical data summary table.

[0124] In a possible implementation manner, when the cycle start and end flag of the current data record is 1, a new cycle data table can be triggered. For example, increment the cycle counter CT cyc by 1 based on the current value, that is, set CT cyc = CT cyc + 1, and let the cycle pointer k = CT cyc, create a new cycle data table k in the database. Retrieve the last two data records in the historical data summary table with the cycle start and end flag being 1. Copy and insert all the data records between these two data records (including these two data records) into the cycle data table k, where k represents the serial number of the current cycle data table and k is a natural number.

[0125] As Figure 2 shown, the database also includes cycle data tables, which are used to record the data of the heat pump unit within one operating cycle (for example, the reference operating cycle). The database can contain multiple cycle data tables. For example, the naming method is [cycle data table 1, cycle data table 2, ······, cycle data table k, ······]. Among them, the serial number k represents the time sequence of the occurrence of this cycle. For example, it can be arranged in ascending order of time.

[0126] Among them, each reference operating cycle of the heat pump unit corresponds to a cycle data table. A data record in a cycle data table corresponds to the target data obtained from one data acquisition within this cycle. The data fields included in the cycle data table can be the same as those included in the historical data summary table, and the data records in a cycle data table can be arranged in ascending order of the data acquisition time sequence.

[0127] Among them, perform a validity check on the reference operating cycle. If the validity check is passed, then determine the multiple target data within the reference operating cycle as the multiple target data within the target operating cycle. It can be a cycle validity check based on the data records in the cycle data table. For example, criteria for the cycle validity check can be preset to determine whether this reference operating cycle can be used as the target operating cycle to participate in the formulation of the heat pump unit control strategy.

[0128] For example, it can traverse each data record in the cycle data table k. When a certain data record (for example, the serial number j) satisfies the following criteria at the same time, the return water temperature flip flag S HC can be set to 1. The total number of data records with the return water temperature flip flag field value of 1 in the cycle data table k can be counted and recorded in the "cycle return water temperature flip counter CT HC ".

[0129] Among them, the criteria corresponding to setting the return water temperature flip flag S HC to 1 can be as follows:

[0130] Criterion 1: T in (j - 2)-T in (j - 1) ≤ 0;

[0131] Criterion 2: T in (j - 1)-T in(j) ≤ 0;

[0132] Criterion 3: T in (j + 1) - T in (j) ≤ 0;

[0133] Criterion 4: T in (j + 2) - T in (j + 1) ≤ 0;

[0134] Criterion 5: S COM (j) = 0.

[0135] Wherein, T in (j) represents the value of the return water temperature in the j-th data record, and S COM (j) represents the compressor start-stop information in the j-th data record.

[0136] Furthermore, if any one of the following criteria is met, it can be determined that the reference operation period is an invalid period, that is, the data in this reference period does not participate in the formulation of the heat pump unit control strategy.

[0137] For example, the criteria for determining that the reference operation period is an invalid period can be as follows:

[0138] Criterion 1: CT HC ≥ 3;

[0139] Criterion 2: CT HC ≤ 1;

[0140] Criterion 3: t D -t A >t cyc,e ;

[0141] Criterion 4: T in (t D ) - T in (t C ) = 0;

[0142] Criterion 5: t D -t C = 0;

[0143] Criterion 6: There are at least two unequal return water temperature set values in the period data table k;

[0144] Criterion 7: There is at least one data record in the period data table k whose acquisition success flag field S co is 0.

[0145] Wherein, T in (t D ) and T in (t C ) respectively represent the return water temperature of the heat pump unit at tD and t C The value of the moment, t D represents the time t when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down C represents the time t when the return water temperature of the heat pump unit reaches the peak value after the compressor shuts down cyc,e is the criterion value for an extremely long cycle, and the criterion value for an extremely long cycle can be set flexibly. For example, its default value is set to 120 minutes

[0146] In this way, the validity of the reference operation cycle can be verified

[0147] In a possible implementation, the database may further include a summary table of cycle characteristic parameters

[0148] As Figure 2 shown, the database further includes a summary table of cycle characteristic parameters. Among them, the summary table of cycle characteristic parameters is used to record the cycle operation characteristics of the heat pump unit in each target operation cycle. Among them, the database may contain a summary table of cycle characteristic parameters, and a data record in the summary table of cycle characteristic parameters corresponds to the parameters of the cycle operation characteristics of a target operation cycle of the heat pump unit. Among them, all the data records in the summary table of cycle characteristic parameters may be arranged in ascending order according to the time sequence of the occurrence of the target operation cycle

[0149] It should be noted that there may be a reference operation cycle that fails to pass the cycle data validity verification, then the numerical value of the cycle operation characteristics of this reference operation cycle may not be calculated and may not be included in the summary table of cycle characteristic parameters

[0150] In a possible implementation, in addition to the fields corresponding to the cycle operation characteristic parameters, the summary table of cycle characteristic parameters may further include the following fields: cycle serial number and valid cycle flag S eff . Among them, the cycle serial number represents the chronological order of a reference operation cycle corresponding to a data record among all reference operation cycles. Among them, the valid cycle flag S eff can represent whether the reference operation cycle corresponding to a data record passes the cycle data validity verification

[0151] If the reference operation cycle fails to pass the validity verification, the value of the valid cycle flag S in the data record corresponding to this reference operation cycle in the summary table of cycle characteristic parameters eff can be set to 0. As described above, the numerical value of the cycle operation characteristics of this reference operation cycle is not calculated. If the reference operation cycle passes the validity verification, the value of the valid cycle flag S in the data record corresponding to the reference operation cycle in the summary table of cycle characteristic parameters eff can be set to 1, and this reference operation cycle is the target operation cycle, and the numerical value of the cycle operation characteristics is calculated

[0152] Among them, to determine the numerical value of the periodic operation characteristics of the target operation period according to the multiple target data may be to respectively determine the numerical value of each periodic operation characteristic according to the multiple target data.

[0153] In a possible implementation manner, the periodic operation characteristics include at least one of the compressor start time, the end time of the compressor off state, the time when the return water temperature of the heat pump unit reaches the peak value after the compressor is turned off, the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off, the compressor off time, the cycle start time, the cycle end time, the average ambient temperature within the cycle, the average ambient temperature during the compressor on period, the characteristic ambient temperature, the total cycle duration, the compressor on duration within the cycle, the compressor off duration within the cycle, the total compressor start and stop duration within the cycle, the return water temperature set value, the characteristic heat consumption duration, the characteristic heat supply number, the characteristic temperature accumulation, the characteristic temperature rise rate, the unit characteristic heat production, the unit characteristic heat loss, and the average heat production temperature difference.

[0154] Among them, the characteristic ambient temperature is a characteristic parameter used to classify the level of the outdoor ambient temperature.

[0155] Among them, the characteristic heat consumption duration is used to characterize the rate of heat consumption of the remaining heat in the pipeline during the compressor off period of the heat pump heating system, and it can be used to reflect the heat consumption power of the heated building.

[0156] Among them, the characteristic heat supply number is used to characterize the cumulative change information of the supply - return water temperature difference of the heat pump unit during the target operation period, and it can be used to reflect the effective heat supply of the heat pump unit in one cycle.

[0157] Among them, the characteristic temperature accumulation is used to characterize the cumulative change of the difference between the supply water temperature and the set return difference temperature of the heat pump unit during the target operation period, and it can be used to reflect the input heat flow of the heated building in one cycle.

[0158] Among them, the characteristic temperature rise rate is used to characterize the rate of increase in the supply water temperature of the heat pump unit during the target operation period, and it can be used to reflect the relationship between the heat pump heating power and the building heat consumption power.

[0159] Among them, the unit characteristic heat production is used to characterize the average value of the supply - return water temperature difference of the heat pump unit during the target operation period, and it can be used to reflect the average heat supply power of the heat pump unit in one cycle.

[0160] Among them, the unit characteristic heat loss is used to characterize the relationship between the heat dissipation amount and the heat dissipation duration of the heat pump heating system during the compressor stop stage of the heat pump unit, and it can be used to reflect the heat consumption rate of the building.

[0161] Among them, the average heating temperature difference is used to characterize the average value of the supply and return water temperature difference of the heat pump unit during the compressor-on period, and it can be used to reflect the average heating capacity of the heat pump unit in this cycle.

[0162] In a possible implementation manner, if the cycle operation characteristic includes the compressor-on time, the (z - 1)-th start-stop moment can be determined as the compressor-on time.

[0163] As described above, the time period between two consecutive starts of the heat pump unit compressor can be determined as a target operation cycle. The multiple target data included in the target operation cycle can be the multiple target data from the (z - 1)-th start-stop moment to the z-th start-stop moment. Then, the (z - 1)-th start-stop moment can be determined as the compressor-on time t. A 。

[0164] For example, the value of the acquisition time field in the first data record of the cycle data table k (corresponding to the (z - 1)-th start-stop moment) can be assigned to the compressor-on time t. A 。

[0165] In a possible implementation manner, if the cycle operation characteristic includes the end time of the compressor-off state, the j-th moment is determined as the end time, where the start-stop information at the (j - 1)-th moment and the j-th moment is both off, and the start-stop information at the (j + 1)-th moment is on. Or, the latest acquisition time of the multiple target data of the target operation cycle is determined as the end time.

[0166] For example, if the start-stop information at the (j - 1)-th moment and the j-th moment is both off, and the start-stop information at the (j + 1)-th moment is on, then it can be determined that the j-th moment is the end time t of the compressor-off state. B 。

[0167] In some alternative embodiments, the latest acquisition time of the multiple target data of the target operation cycle can also be determined as the end time. For example, the value of the acquisition time field of the data record with the latest acquisition time in the cycle data table k can be assigned (the latest acquisition time of the multiple target data of this target operation cycle) to the end time t of the compressor-off state. B 。

[0168] In a possible implementation manner, if the cycle operation characteristic includes the time when the return water temperature of the heat pump unit reaches a peak value after the compressor is turned off, all the first target data that meet the return water temperature flip criterion among the multiple target data are determined, and the latest acquisition moment of all the first target data is determined as the time t when the return water temperature of the heat pump unit reaches a peak value after the compressor is turned off. C The return water temperature flip means that the change trend of the return water temperature changes.

[0169] For example, all the return water temperature reversal flags S in the periodic data table k can be screened HC for the data records with the field value of 1, find the data record with the latest acquisition time among them, and determine the field value of the acquisition time of this data record as t C .

[0170] In a possible implementation manner, if the periodic operation feature includes the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off, then the latest acquisition time of multiple target data of the target operation period is determined as the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off.

[0171] For example, the field value of the acquisition time of the data record with the latest acquisition time in the periodic data table k can be assigned to t D .

[0172] In a possible implementation manner, if the periodic operation feature includes the compressor shutdown time, then the y-th moment is determined as the compressor shutdown time, where the compressor is in the off state at the y-th moment and the compressor is in the on state at the (y - 1)-th moment, where y is an integer greater than 2.

[0173] For example, according to the periodic data table k, if it is determined that the compressor is in the off state at the y-th moment and the compressor is in the on state at the (y - 1)-th moment, then the y-th moment can be determined as the compressor shutdown time.

[0174] In a possible implementation manner, if the periodic operation feature includes the start time of the period, then the (z - 1)-th start-stop moment is determined as the start time of the period.

[0175] As described above, the (z - 1)-th start-stop moment is determined as the start time t of the period start . It should be understood that the (z - 1)-th start-stop moment can be the compressor start time t A .

[0176] In a possible implementation manner, if the periodic operation feature includes the end time of the period, then the j-th moment is determined as the end time of the period, where the start-stop information at the (j - 1)-th moment and the j-th moment is both off, and the start-stop information at the (j + 1)-th moment is on, or the latest acquisition time of multiple target data of the target operation period is determined as the end time of the period.

[0177] For example, the end time of the compressor off state determined above for the current target operation period or the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off can be determined as the end time of the period.

[0178] For example, t B or t D can be determined as the cycle end time t end .

[0179] In a possible implementation, if the cycle operation feature includes the average ambient temperature within the cycle, the average ambient temperature is determined according to the ambient temperature values of the multiple target data.

[0180] For example, the average ambient temperature can be determined by the following formula

[0181]

[0182] where j represents the serial number of the data record in the cycle data table k, and T amb (j) represents the ambient temperature field value of the j-th data record in the cycle data table k; N k represents the total number of data records in the cycle data table k.

[0183] In a possible implementation, if the cycle operation feature includes the average ambient temperature during the compressor startup time period, all second target data during the compressor startup time period are determined from the multiple target data, and the average ambient temperature during the compressor startup time period is determined according to the ambient temperature values of all the second target data

[0184] In a possible implementation, if the cycle operation feature includes the characteristic ambient temperature, the average ambient temperature within the cycle can be determined, and the characteristic ambient temperature is determined according to the average ambient temperature within the cycle and the graduation value of the characteristic ambient temperature.

[0185] For example, the characteristic ambient temperature T amb,c can be determined by the following formula

[0186]

[0187] where: ΔT amb,c is the graduation value of the characteristic ambient temperature, representing the tolerance of the characteristic ambient temperature candidate value sequence, and this value can be set flexibly. For example, ΔT amb,c can be set to 2.

[0188] In a possible implementation, if the cycle operation feature includes the total cycle duration, the difference between the cycle start time and the cycle end time or the difference between the end time t B of the compressor off state and the start time t A of the compressor can be determined as the total cycle duration.

[0189] For example, the difference between the start time and the end time of a cycle can be determined as the total cycle duration Δt cyc , and the end time t B of the compressor off state and the start time t A of the compressor on state can also be determined as the total cycle duration Δt cyc .

[0190] In a possible implementation, if the cycle operation feature includes the compressor on duration within the cycle, the compressor on duration can be determined based on the difference between the compressor off time and the compressor on time, or the product of the number of compressor on times and the deviation of the acquisition time step.

[0191] In some alternative embodiments, the compressor on duration Δt can be determined according to the following formula ON :[[]]END]]

[0192] Δt ON =CT ON ×Δt

[0193] where CT ON can represent the number of compressor on times within the target operation cycle, and Δt can represent the deviation of the acquisition time step. The total number of data records with the compressor state S COM =1 can be counted in the cycle data table k and recorded in the compressor on state counter CT ON .

[0194] In some alternative embodiments, the compressor on duration Δt can also be determined according to the following formula ON :[[]]END]]

[0195] Δt ON =t E -t A

[0196] where t E represents the compressor off time, and t A represents the compressor on time.

[0197] In a possible implementation, if the cycle operation feature includes the compressor off duration within the cycle, the compressor off duration within the cycle can be determined based on the difference between the end time of the compressor off state and the compressor off time, or the product of the number of compressor off times and the deviation of the acquisition time step.

[0198] In some alternative embodiments, the compressor off duration Δt can be determined according to the following formula OFF :[[]]END]]

[0199] Δt OFF =CTOFF ×Δt

[0200] where CT OFF can represent the number of times the compressor is turned off during the target operating cycle, and Δt can represent the deviation of the acquisition time step. The compressor status S can be counted in the cycle data table k COM =0 of the total number of data records, and it is included in the compressor on-state counter CT OFF .

[0201] In some alternative embodiments, the compressor off-time Δt can also be determined according to the following formula OFF :[[]]

[0202] Δt OFF =t B -t E

[0203] In one possible implementation, if the periodic operation feature includes the total on-off time of the cycle, the total on-off time of the cycle can be determined according to the sum of the compressor on-time and the compressor off-time within the cycle.[[]]

[0204] In some alternative embodiments, the total on-off time Δt can be determined according to the following formula cyc,eff :[[]]

[0205] Δt cyc,eff =Δt ON +Δt OFF

[0206] In one possible implementation, if the periodic operation feature includes the set value of the return water temperature within the cycle, the set value of the return water temperature in the multiple target data is determined as the set value of the return water temperature within the cycle.[[]]

[0207] For example, the set return water temperature T of the first data record in the cycle data table k can be read set field value, and it is assigned to the cycle set return water temperature T set,cyc .

[0208] In one possible implementation, if the periodic operation feature includes the characteristic heat consumption time, determine the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor is turned off, and determine the difference between the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor is turned off as the characteristic heat consumption time.[[]]

[0209] In some alternative embodiments, the characteristic heat consumption time TSC can be determined according to the following formula

[0210] TSC = t D -t C

[0211] In a possible implementation, if the periodic operation feature includes the characteristic heating number, the characteristic heating number is determined according to the return water temperature and the outlet water temperature of each target data among the multiple target data.

[0212] As described above, the characteristic heating number is used to characterize the cumulative change information of the temperature difference between the supply water and the return water of the heat pump unit during the target operation period, and it can be used to reflect the effective heat supply of the heat pump unit in one cycle. For example, the characteristic heating number TGR can be determined according to the following formula:

[0213]

[0214] Where, T in (t) represents the return water temperature of the heat pump unit at time t, and T out (t) represents the outlet water temperature of the heat pump unit at time t.

[0215] In some alternative embodiments, in combination with the periodic data table in the database, the characteristic heating number TGR can be determined according to the following formula:

[0216]

[0217] Where, N end is the serial number of the data record corresponding to "the acquisition time is t end in the periodic data table k; T in (j) represents the return water temperature T in field value of the jth data record in the periodic data table k; T out (j) represents the outlet water temperature T out field value of the heat pump unit of the jth data record in the periodic data table k.

[0218] In a possible implementation, if the periodic operation feature includes the characteristic temperature accumulation, the characteristic temperature accumulation is determined according to the outlet water temperature, the set value of the return water temperature, and the set value of the differential temperature of each target data among the multiple target data.

[0219] In some alternative embodiments, the characteristic temperature accumulation TLJ can be determined according to the following formula:

[0220]

[0221] Where, T out (t) represents the outlet water temperature of the heat pump unit at time t, T set is the set return water temperature of the heat pump unit, and ΔT hIt is the set return difference temperature of the heat pump unit.

[0222] In some alternative embodiments, in combination with the periodic data table in the database, the characteristic temperature accumulation TLJ can be determined according to the following formula:

[0223]

[0224] where N B is the serial number of the data record corresponding to the acquisition time t B in the periodic data table k; T out (j) represents the outlet water temperature T of the j-th data record in the periodic data table k out field value.

[0225] In one possible implementation, if the periodic operation characteristics include a characteristic temperature rise rate, then according to the compressor start time, the outlet water temperature at the compressor start time, the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down, and the outlet water temperature at the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down, the characteristic temperature rise rate is determined.

[0226] In some alternative embodiments, the characteristic temperature rise rate TSL can be determined according to the following formula:

[0227] TSL = [T out (t E ) - T out (t A )] / (t E - t A )

[0228] where T out (t E ) represents the outlet water temperature at t E , and T out (t A ) represents the outlet water temperature at t A .

[0229] In one possible implementation, if the periodic operation characteristics include the unit characteristic heating capacity, then according to the return water temperature, the outlet water temperature of each target data among the multiple target data, and the total duration of the period, the unit characteristic heating capacity is determined.

[0230] In some alternative embodiments, the unit characteristic heating capacity DZR can be determined according to the following formula:

[0231]

[0232] In some alternative embodiments, in combination with the periodic data table in the database, the unit characteristic heating capacity DZR can be determined according to the following formula:

[0233]

[0234] In a possible implementation, if the periodic operation feature includes unit characteristic heat loss, the unit characteristic heat loss is determined based on the return water temperature of each target data between the time when the return water temperature of the heat pump unit reaches the peak value and the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off according to the acquisition time, and the time difference between the time when the return water temperature of the heat pump unit reaches the lowest value and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor is turned off.

[0235] In some alternative embodiments, the unit characteristic heat loss DTS can be determined according to the following formula:

[0236]

[0237] In some alternative embodiments, in combination with the periodic data table in the database, the unit characteristic heat loss DTS can be determined according to the following formula:

[0238]

[0239] where N C is the serial number of the data record corresponding to the acquisition time t C in the periodic data table k; N D is the serial number of the data record corresponding to the acquisition time t D in the periodic data table k; T in (N D ) represents the return water temperature T D field value of the data record with the serial number N in in the periodic data table k.

[0240] In a possible implementation, if the periodic operation feature includes the average heating temperature difference, the average heating temperature difference can be determined based on the return water temperature, the outlet water temperature of each target data between the compressor start time and the compressor stop time according to the acquisition time, and the time difference between the compressor stop time and the compressor start time.

[0241] In a possible implementation, the average heating temperature difference JWC can be determined according to the following formula:

[0242]

[0243] In a possible implementation, in combination with the periodic data table in the database, the average heating temperature difference JWC can be determined according to the following formula:

[0244]

[0245] Among them, N E is the corresponding acquisition time t E The data is recorded in the sequence number of the "periodic data table k".

[0246] In a possible implementation, when the update of the periodic characteristic parameter summary table is triggered, a new data record may be created in the periodic characteristic parameter summary table, and the calculated parameter values of the periodic operation characteristics may be sequentially inserted into corresponding fields of the new data record.

[0247] In this way, the value of the cyclical operating characteristic can be determined.

[0248] In one possible implementation, determining the category corresponding to the target operating cycle and the control criterion value of the category based on the numerical value of the periodic operating characteristic may refer to determining the category corresponding to the target operating cycle based on the numerical value of the periodic operating characteristic, and updating the control criterion value of the category based on the numerical value of the periodic operating characteristic of the target operating cycle.

[0249] In a possible implementation, the category corresponding to the target operation cycle is determined based on a characteristic ambient temperature and the return water temperature, wherein the periodic operation characteristics include the characteristic ambient temperature and the return water temperature.

[0250] Wherein, determining the category corresponding to the target operation cycle and the control criterion value of the category according to the value of the periodic operation characteristic includes:

[0251] Determining the category corresponding to the target operation cycle according to the characteristic ambient temperature value at the current moment and the return water temperature setting value;

[0252] The control criterion value of the category is updated according to the value of the periodic operation characteristic of the target operation cycle.

[0253] like Figure 2 As shown, the database also includes a periodic characteristic parameter condition classification table. The periodic characteristic parameter condition classification table is used to classify the "periodic characteristic parameter summary table" according to preset conditions and copy the data that meets the same conditions into the same database table to establish a data table.

[0254] For example, the database contains multiple periodic characteristic parameter condition classification tables, named as [Condition Periodic Characteristic Parameter Table 1, Condition Periodic Characteristic Parameter Table 2, ……, Condition Periodic Characteristic Parameter Table l, ……], where the serial number l represents the number of the classification condition used to establish the "Periodic Characteristic Parameter Condition Classification Table" in the candidate classification condition sequence. Among them, the number of periodic characteristic parameter condition classification tables can be the same as the total number of candidate classification conditions. A data record in a "Periodic Characteristic Parameter Condition Classification Table" represents several target periodic operation characteristics of a target operation period that meets the corresponding classification conditions.

[0255] For example, taking the characteristic ambient temperature T amb,c and the set value of the periodic return water temperature T set,cyc of the heat pump unit as classification variables to establish a periodic characteristic parameter condition classification table, the classification condition can be expressed as:

[0256] {A} l =(T am b ,c ={T am b ,c} m ∩T set,cyc ={T set,cyc} q )

[0257] Among them, 1 ≤ m ≤ M, 1 ≤ q ≤ Q, 1 ≤ l ≤ L. {A} represents the candidate classification condition sequence; {T amb,c} represents the candidate value sequence of the characteristic ambient temperature; {T set,cyc} represents the candidate value sequence of the set return water temperature; the subscript m represents the serial number of a certain characteristic ambient temperature in its candidate value sequence; the subscript q represents the serial number of a certain set return water temperature in its candidate value sequence; the subscript l represents the serial number of a certain classification condition in the candidate classification condition sequence, and its value satisfies l = (m - 1)·q + q; M represents the number of candidate values of the characteristic ambient temperature; Q represents the number of candidate values of the set return water temperature; L represents the total number of classification conditions, and its value satisfies L = MQ.

[0258] In a possible implementation, the candidate value sequence {T amb,c} of the characteristic ambient temperature can be an arithmetic sequence with a common difference of ΔT amb,c , and it can be expressed as:

[0259] {T amb,c} m =T amb,c,min +(m - 1)ΔT amb,c

[0260] Among them, 1 ≤ m ≤ [(T amb,c,max -T amb,c,min ) / ΔTamb,c +1]. Among them, T amb,c,max and T amb,c,min are respectively the upper and lower limit values of the characteristic environmental temperature, and their values are determined by the maximum and minimum values of the environmental temperature T amb field values in the total historical data table.

[0261] In a possible implementation, it can be determined respectively according to the following formula:

[0262] T amb,c,max = ΔT amb,c [max(T amb ) / ΔT amb,c

[0263] T amb,c,min = ΔT amb,c [min(T amb ) / ΔT amb,c

[0264] Among them, max(T amb ) and min(T amb ) respectively represent the maximum and minimum values of the environmental temperature T amb field in the total historical data table;

[0265] In a possible implementation, the set of candidate values for the periodic return water temperature {T set,cyc} is an arithmetic sequence with a common difference of ΔT set , and it can be expressed as:

[0266] {T set,cyc} q = T set,min + (q - 1)ΔT set

[0267] Among them, 1 ≤ q ≤ [(T set,max - T set,min ) / ΔT set + 1]. Among them, T set,max and T set,min are respectively the upper and lower limit values of the return water temperature, and can be given by the built-in controller of the heat pump unit.

[0268] In a possible implementation, when triggering the update of the periodic characteristic parameter condition classification table, the characteristic environmental temperature and the periodic set return water temperature in the last data record of the periodic characteristic parameter summary table can be read, the corresponding periodic characteristic parameter condition classification table can be found according to the preset conditions, a new data record can be created in this table, and the parameter values of the periodic operation characteristics can be inserted into the corresponding fields of this data record in sequence;

[0269] ​​Among them, updating the regulation criterion value of the category according to the numerical value of the periodic operation characteristics of the target operation cycle can be understood as calculating the periodic regulation criterion value under the corresponding classification conditions and updating the criterion value to the "regulation criterion table" when the total number of data records in the updated periodic characteristic parameter condition classification table is greater than the data volume requirement for updating the regulation criterion table. Among them, the data volume requirement for updating the regulation criterion table can be flexibly set. For example, the default value is 5.

[0270] For example, the periodic regulation criteria of the heat pump unit under different classification conditions can be recorded through the regulation criterion table in the database. The periodic regulation criterion can refer to the criterion used to evaluate the magnitude of the current periodic operation characteristic parameter value of the heat pump unit, so as to determine the subsequent set operation parameters of the heat pump unit.

[0271] In the database established by the present invention, there can be a regulation criterion table, and any data record in the regulation criterion table corresponds to several regulation criterion values of the heat pump unit under a classification condition. For example, it can include: condition serial number, used to represent the serial number of the classification condition corresponding to this data record in the candidate classification condition sequence, characteristic ambient temperature, periodic set return water temperature, characteristic heat consumption duration criterion value, characteristic heat supply number criterion value, characteristic temperature accumulation criterion value, characteristic temperature rise rate criterion value, unit characteristic heat production criterion value, unit characteristic heat loss number criterion value, and average heat production temperature difference criterion value. The form of the regulation criterion value is not limited in the present disclosure.

[0272] In a possible implementation manner, updating the regulation criterion value of the category according to the numerical value of the periodic operation characteristics of the target operation cycle includes:

[0273] Determining the average value of each parameter according to the numerical value of the periodic operation characteristics and the historical numerical value of the parameters of the regulation criterion of the category;

[0274] Determining the regulation criterion value of the category according to the average value of each parameter,

[0275] Among them, the parameters of the regulation criterion include at least one of characteristic heat consumption duration, characteristic heat supply number, characteristic temperature accumulation, characteristic temperature rise rate, unit characteristic heat production, unit characteristic heat loss, and average heat production temperature difference.

[0276] Among them, the characteristic heat consumption duration criterion value can be a criterion value used to evaluate the magnitude of the characteristic heat consumption duration of the current cycle. For example, the arithmetic mean of all characteristic heat consumption duration field values in a periodic characteristic parameter condition classification table can be used as the characteristic heat consumption duration criterion value under the corresponding conditions.

[0277] For example, the following formula can be used to determine the characteristic heat consumption duration criterion value TSCCR :

[0278]

[0279] Among them, TSC CR (l) represents the characteristic heat consumption duration criterion value corresponding to the classification condition {A} l ; u represents the serial number of the data record in the periodic characteristic parameter condition classification table l; TSC(u) represents the characteristic heat consumption duration of the u-th data record in the periodic characteristic parameter condition classification table l; N l represents "the total number of data records in the periodic characteristic parameter condition classification table l.

[0280] Among them, the characteristic heat supply number criterion value is a criterion value that can be used to judge the magnitude of the characteristic heat supply number in the current period. For example, the arithmetic mean of all the characteristic heat supply number field values in a periodic characteristic parameter condition classification table can be used as the characteristic heat supply number criterion value for the corresponding condition.

[0281] For example, the following formula can be used to determine the characteristic heat supply number criterion value TGR CR :

[0282]

[0283] Among them, TGR CR (l) represents the characteristic heat supply number criterion value corresponding to the classification condition {A} l ; TGR(u) represents the characteristic heat supply number of the u-th data record in the periodic characteristic parameter condition classification table l.

[0284] Among them, the characteristic temperature accumulation criterion value is a criterion value that can be used to judge the magnitude of the characteristic temperature accumulation in the current period. For example, the arithmetic mean of all the characteristic temperature accumulation field values in a periodic characteristic parameter condition classification table can be used as the characteristic temperature accumulation criterion value for the corresponding condition.

[0285] For example, the following formula can be used to determine the characteristic temperature accumulation criterion value TLJ CR :

[0286]

[0287] Among them, TLJ CR (l) represents the characteristic temperature accumulation number criterion value corresponding to the classification condition {A} l ; u represents the serial number of the data record in the periodic characteristic parameter condition classification table l; TLJ(u) represents the characteristic temperature accumulation number criterion value of the u-th data record in the periodic characteristic parameter condition classification table l.

[0288] Among them, the characteristic temperature rise rate criterion value is a criterion value used to judge the magnitude of the characteristic temperature rise rate in the current cycle. For example, the arithmetic mean of all the characteristic temperature rise rate field values in a cycle characteristic parameter condition classification table can be used as the characteristic temperature rise rate criterion value for the corresponding condition.

[0289] For example, the following formula can be used to determine the characteristic temperature rise rate criterion value TSL CR :

[0290]

[0291] Among them, TSL CR (l) represents the characteristic temperature rise rate criterion value corresponding to the classification condition {A} l ; TSL(u) represents the characteristic temperature rise rate of the u-th data record in the cycle characteristic parameter condition classification table l.

[0292] Among them, the unit characteristic heat production criterion value is a criterion value used to judge the magnitude of the unit characteristic heat production in the current cycle. For example, the arithmetic mean of all the unit characteristic heat production field values in a cycle characteristic parameter condition classification table can be used as the unit characteristic heat production criterion value for the corresponding condition.

[0293] For example, the following formula can be used to determine the unit characteristic heat production criterion value DZR CR :

[0294]

[0295] Among them, DZR CR (l) represents the unit characteristic heat production criterion value corresponding to the classification condition {A} l ; DZR(u) represents the unit characteristic heat production of the u-th data record in the "cycle characteristic parameter condition classification table l".

[0296] Among them, the unit characteristic heat loss number criterion value is a criterion value used to judge the magnitude of the unit characteristic heat loss number in the current cycle. For example, the arithmetic mean of all the unit characteristic heat loss number field values in a cycle characteristic parameter condition classification table is used as the unit characteristic heat loss number criterion value for the corresponding condition.

[0297] For example, the following formula can be used to determine the unit characteristic heat loss number criterion value DTS CR :

[0298]

[0299] Among them, DTS CR (l) represents the classification condition {A} lThe corresponding unit characteristic heat loss number criterion value; DTS(u) represents the unit characteristic heat loss number of the u-th data record in the periodic characteristic parameter condition classification table l.

[0300] Among them, the average heating temperature difference criterion value is a criterion value that can be used to judge the magnitude of the average heating temperature difference in the current cycle. For example, the arithmetic mean of all the average heating temperature difference field values in a periodic characteristic parameter condition classification table can be used as the average heating temperature difference criterion value for the corresponding condition.

[0301] For example, the following formula can be used to determine the average heating temperature difference criterion value JWC CR :

[0302]

[0303] Among them, JWC CR (l) represents the average heating temperature difference criterion value corresponding to the classification condition {A} l ; JWC(u) represents the average heating temperature difference of the u-th data record in the periodic characteristic parameter condition classification table l.

[0304] It should be understood that the above is an exemplary determination method for the regulation criterion value, and the present disclosure does not limit the method for determining the regulation criterion value.

[0305] In a possible implementation manner, when the return water temperature adjustment condition is satisfied, the return water temperature set value is adjusted according to the regulation criterion value. The return water temperature set value is used to control the working state of the heat pump unit, which may refer to judging whether the return water temperature adjustment condition is satisfied. For example, verifying the feasibility of parameter adjustment. When the return water temperature adjustment condition is satisfied, the return water temperature set value is adjusted according to the regulation criterion value.

[0306] Among them, the return water temperature adjustment condition includes simultaneously satisfying the low-temperature protection criterion, the cycle duration criterion, the parameter adjustment interval criterion, and the no-defrosting criterion.

[0307] For example, when a new set of collected data is input into the periodic characteristic parameter summary table, it can trigger the verification of the feasibility of parameter adjustment of the heat pump unit (judging whether the return water temperature adjustment condition is satisfied). If all the criteria are satisfied simultaneously, it is determined that the current heat pump unit has the feasibility of parameter adjustment, that is, the return water temperature adjustment condition is satisfied; otherwise, it is determined that the current does not have the feasibility of parameter adjustment.

[0308] Among them, the return water temperature adjustment condition includes simultaneously satisfying the low-temperature protection criterion, the cycle duration criterion, the parameter adjustment interval criterion, and the no-defrosting criterion.

[0309] In a possible implementation manner, the low-temperature protection criterion may be the currently collected ambient temperature T amb ≥T amb,p; where T amb,p is the "low-temperature parameter adjustment protection criterion value", and this value can be set flexibly. For example, the default value is 2 degrees Celsius.

[0310] In a possible implementation, the cycle duration criterion can be the time lengths Δt cyc (k) and Δt cyc (k - 1) of the current cycle and its previous cycle, which are greater than Δt cyc,DL and less than Δt cyc,HL .

[0311] Among them, Δt cyc,DL and Δt cyc,HL are respectively the "lower limit value and upper limit value of the parameter adjustment protection cycle duration", and this value can be set flexibly. For example, the default values of Δt cyc,DL and Δt cyc,HL are set to 30 minutes and 120 minutes respectively.

[0312] In a possible implementation, the parameter adjustment interval criterion can refer to that there is no adjustment of the set operating parameters of the heat pump unit in the current cycle and the previous N NT cycles. Among them, N NT is the "parameter adjustment interval protection criterion value" and can be set flexibly. For example, the default value of N NT is set to 2;

[0313] In a possible implementation, the no-defrost criterion can refer to that there is no data record with the defrost status flag S DE = 1 in the cycle data table k.

[0314] In a possible implementation, the regulation criterion value includes the characteristic heat consumption duration criterion value.

[0315] Among them, according to the regulation criterion value, adjusting the return water temperature set value includes:

[0316] respectively determining the periodic change of the moving average of the characteristic heat supply number, the periodic change of the characteristic heat consumption duration, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value, and the periodic change of the unit characteristic heat production amount. Among them, the periodic change is determined according to the values of the current k-th target operation cycle and the (k - 1)-th target operation cycle, and k is an integer greater than 1;

[0317] When the periodic change of the moving average of the characteristic heat consumption duration is less than 0, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value is less than 0, the periodic change of the characteristic heat supply number is greater than 0, and the periodic change of the unit characteristic heat production amount is greater than 0, the difference between the current return water temperature set value and the downward parameter adjustment increment value is determined as the updated return water temperature set value;

[0318] When the periodic change amount of the moving average of the characteristic heat consumption duration is greater than 0, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value is greater than 0, the periodic change amount of the characteristic heat supply number is less than 0, and the periodic change amount of the unit characteristic heat production is less than 0, the sum of the current return water temperature set value and the upward parameter adjustment increment value is determined as the updated return water temperature set value.

[0319] For example, if the current data passes the parameter adjustment feasibility verification and meets the return water temperature adjustment condition, the set return water temperature of the air source heat pump unit is adjusted. For example, the set return water temperature of the heat pump unit can be adjusted according to the change law of the "periodic operation characteristic parameters" and its relationship with the corresponding periodic operation characteristic parameter criterion values.

[0320] For example, the periodic change amount of the moving average of the characteristic heat supply number can be determined according to the following formula, where the periodic change amount of the moving average of the characteristic heat supply number can refer to the difference between the moving average of the characteristic heat supply number in the current period (sequence number k) and the moving average of the characteristic heat supply number in the previous period:

[0321]

[0322] In a possible implementation manner, the periodic change amount of the characteristic heat consumption duration can be determined according to the following formula:

[0323] ΔTSC(k) = TSC(k) - TSC(k - 1)

[0324] In a possible implementation manner, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value can be determined according to the following formula:

[0325] ΔTSC CR (k) = TSC(k) - TSC CR (k)

[0326] In a possible implementation manner, the periodic change amount of the unit characteristic heat production can be determined according to the following formula:

[0327] ΔDZR(k) = DZR(k) - DZR(k - 1)

[0328] In a possible implementation manner, when the periodic change amount of the moving average of the characteristic heat consumption duration is less than 0, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value is less than 0, the periodic change amount of the characteristic heat supply number is greater than 0, and the periodic change amount of the unit characteristic heat production is greater than 0, the difference between the current return water temperature set value and the downward parameter adjustment increment value is determined as the updated return water temperature set value.

[0329] For example, the set return water temperature of the heat pump unit is then subtracted by ΔT set,down on the basis of the current value, that is, set Tset = T set - ΔT set,down , and transmit this data to the heat pump unit controller; where ΔT set,down is the downlink parameter adjustment increment value, and this value can be flexibly set. For example, the default value of ΔT set,down can be given as 1.

[0330] In a possible implementation, when the periodic change amount of the moving average of the characteristic heat consumption duration is greater than 0, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value is greater than 0, the periodic change amount of the characteristic heat supply number is less than 0, and the periodic change amount of the unit characteristic heat production amount is less than 0, the sum of the current return water temperature set value and the uplink parameter adjustment increment value is determined as the updated return water temperature set value.

[0331] For example, the set return water temperature of the heat pump unit is increased by ΔT set,up on the basis of the current value, that is, set T set = T set + ΔT set,up ; where, ΔT set,up is the uplink parameter adjustment increment value, which can be flexibly set. For example, the default value of ΔT set,up is given as 1;

[0332] According to the embodiments of the present disclosure, the periodic heating characteristic parameters of the heat pump unit are defined to describe the operating state of the air source heat pump system and the building heating state; based on learning the historical operation data of the heat pump unit, the distribution law of the characteristic parameters of the heat pump unit under different operating conditions is established. Accordingly, a control criterion for the heat pump unit is generated, with the set return water temperature of the heat pump unit as the control variable, to automatically adjust the heat supply amount of the heat pump unit, achieving the purpose of improving the operating efficiency of the heat pump unit, improving the heating effect, reducing excessive heating, and reducing energy consumption.

[0333] It can be understood that the above-mentioned various method embodiments mentioned in the present disclosure can be combined with each other to form a combined embodiment without violating the principle logic. Due to space limitations, the present disclosure will not elaborate further. Those skilled in the art can understand that in the above methods of the specific implementation manner, the specific execution order of each step should be determined according to its function and possible internal logic.

[0334] In addition, the present disclosure also provides a heat pump unit return water temperature adjustment device, an electronic device, a computer-readable storage medium, and a program, all of which can be used to implement any one of the heat pump unit return water temperature adjustment methods provided by the present disclosure. The corresponding technical solutions and descriptions are referred to the corresponding records in the method part and will not be elaborated further.

[0335] Figure 3 The block diagram of the heat pump unit return water temperature adjustment device according to an embodiment of the present disclosure is shown. As Figure 3As shown, the device includes:

[0336] A first determination module 21, configured to determine a plurality of target data of the heat pump unit during a target operation period, where the heat pump unit is used to supply heat to a building;

[0337] A second determination module 22, configured to determine a numerical value of the periodic operation characteristics of the target operation period according to the plurality of target data, where the periodic operation characteristics are used to characterize the operation state of the heat pump unit and the heat supply state of the building;

[0338] A third determination module 23, configured to determine the category corresponding to the target operation period and the regulation criterion value of the category according to the numerical value of the periodic operation characteristics;

[0339] An adjustment module 24, configured to adjust the set value of the return water temperature according to the regulation criterion value when the return water temperature adjustment condition is met, where the set value of the return water temperature is used to control the working state of the heat pump unit.

[0340] Figure 4 The block diagram of the heat pump unit return water temperature adjustment device according to an embodiment of the present disclosure is shown. For example, the device 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0341] Referring to Figure 4 , the device 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input / output (I / O) interface 812, a sensor component 814, and a communication component 816.

[0342] The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, telephone call, data communication, camera operation, and recording operation. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

[0343] The memory 804 is configured to store various types of data to support the operation of the device 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, and the like. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disk.

[0344] The power supply component 806 provides power to the various components of the device 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

[0345] The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can not only sense the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 808 includes a front camera and / or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each of the front camera and the rear camera can be a fixed optical lens system or have a focal length and optical zoom capabilities.

[0346] The audio component 810 is configured to output and / or input audio signals. For example, the audio component 810 includes a microphone (MIC) that is configured to receive external audio signals when the device 800 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals can be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, the audio component 810 further includes a speaker for outputting audio signals.

[0347] The I / O interface 812 provides an interface between the processing component 802 and a peripheral interface module, which can be a keyboard, a click wheel, buttons, etc. These buttons can include, but are not limited to: a home button, a volume button, a power-on button, and a lock button.

[0348] The sensor assembly 814 includes one or more sensors for providing a status assessment of various aspects of the device 800. For example, the sensor assembly 814 can detect the on / off state of the device 800, the relative positioning of components, such as the display and keypad of the device 800. The sensor assembly 814 can also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration / deceleration of the device 800, and a change in the temperature of the device 800. The sensor assembly 814 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0349] The communication component 816 is configured to facilitate communication between the device 800 and other devices in a wired or wireless manner. The device 800 can access a wireless network based on communication standards, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0350] In an exemplary embodiment, the device 800 can be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above method.

[0351] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 804 including computer program instructions, and the above computer program instructions can be executed by a processor 820 of the device 800 to complete the above method.

[0352] Figure 5 A block diagram of a return water temperature adjustment device of a heat pump unit according to an embodiment of the present disclosure is shown. For example, the device 1900 can be provided as a server. Refer to Figure 5, Device 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by a memory 1932 for storing instructions executable by the processing component 1922, such as application programs. The application programs stored in the memory 1932 may include one or more modules each corresponding to a set of instructions. In addition, the processing component 1922 is configured to execute instructions to perform the above-described method.

[0353] Device 1900 may further include a power component 1926 configured to perform power management of Device 1900, a wired or wireless network interface 1950 configured to connect Device 1900 to a network, and an input / output (I / O) interface 1958. Device 1900 may operate based on an operating system stored in the memory 1932, such as Windows ServerTM, MacOS XTM, UnixTM, LinuxTM, FreeBSDTM or the like.

[0354] In an exemplary embodiment, a non-transitory computer-readable storage medium is also provided, such as the memory 1932 including computer program instructions, and the computer program instructions can be executed by the processing component 1922 of the device 1900 to complete the above method.

[0355] The present disclosure may be a system, a method, and / or a computer program product. The computer program product may include a computer-readable storage medium having thereon computer-readable program instructions for causing a processor to implement various aspects of the present disclosure.

[0356] A computer-readable storage medium may be a tangible device that can retain and store instructions for use by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanically encoded device, such as a punched card or raised structures in grooves having instructions stored thereon, and any suitable combination of the foregoing. The computer-readable storage medium used herein is not construed as being a transitory signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0357] The computer-readable program instructions described herein can be downloaded to various computing / processing devices from a computer-readable storage medium or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network may include copper transmission cables, optical fiber transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each computing / processing device.

[0358] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state-setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet connection using an Internet service provider). In some embodiments, by using the state information of the computer-readable program instructions to customize an electronic circuit, such as a programmable logic circuit, a field-programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer-readable program instructions to implement various aspects of the present disclosure.

[0359] Aspects of the present disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0360] These computer-readable program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus to produce a machine such that the instructions, when executed by the processor of the computer or other programmable data processing apparatus, create means for implementing the functions / acts specified in one or more boxes of the flowchart and / or block diagram. These computer-readable program instructions may also be stored in a computer-readable storage medium that causes a computer, a programmable data processing apparatus, and / or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises a manufacture including instructions which implement various aspects of the functions / acts specified in one or more boxes of the flowchart and / or block diagram.

[0361] The computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process such that the instructions executed on the computer, other programmable data processing apparatus, or other device implement the functions / acts specified in one or more boxes of the flowchart and / or block diagram.

[0362] The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a segment of code, or a portion of an instruction, which comprises one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two consecutive blocks may in fact be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and / or flowchart illustrations, and combinations of blocks in the block diagrams and / or flowchart illustrations, can be implemented by special-purpose hardware-based systems that perform the specified functions or acts, or combinations of special-purpose hardware and computer instructions.

[0363] The embodiments of the present disclosure have been described above. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A method for adjusting the return water temperature of a heat pump unit, characterized in that, Including: Determine multiple target data of the heat pump unit within a target operation period, where the heat pump unit is used for heating a building; According to the multiple target data, determine the numerical value of the cycle operation characteristics of the target operation period, where the cycle operation characteristics are used to characterize the operation state of the heat pump unit and the heating state of the building; According to the numerical value of the cycle operation characteristics, determine the category corresponding to the target operation period and the regulation criterion value of the category; When the return water temperature adjustment condition is satisfied, adjust the return water temperature set value according to the regulation criterion value, where the return water temperature set value is used to control the working state of the heat pump unit; Wherein, the category corresponding to the target operation period is determined according to the characteristic ambient temperature and the return water temperature, and the cycle operation characteristics include the characteristic ambient temperature and the return water temperature; Wherein, the determining the category corresponding to the target operation period and the regulation criterion value of the category according to the numerical value of the cycle operation characteristics includes: Determine the category corresponding to the target operation period according to the characteristic ambient temperature value and the return water temperature set value at the current moment; Update the regulation criterion value of the category according to the numerical value of the cycle operation characteristics of the target operation period; Wherein, the updating the regulation criterion value of the category according to the numerical value of the cycle operation characteristics of the target operation period includes: Determine the average value of each parameter according to the numerical value of the cycle operation characteristics and the historical numerical value of the parameters of the regulation criterion of the category; Determine the regulation criterion value of the category according to the average value of each parameter; Wherein, the parameters of the regulation criterion include at least one of characteristic heat consumption duration, characteristic heating number, characteristic temperature accumulation, characteristic temperature rise rate, unit characteristic heat production, unit characteristic heat loss, and average heating temperature difference.

2. The method according to claim 1, wherein The determining the multiple target data of the heat pump unit within the target operation period includes: Obtain target data at a preset frequency, where the target data includes the start-stop information of the compressor of the heat pump unit; According to the start-stop information, determine a reference operation period and multiple target data within the reference operation period, where the target data within the reference operation period is data verified through data; Perform validity verification on the reference operation period. If the validity verification is passed, determine the multiple target data within the reference operation period as the multiple target data within the target operation period.

3. The method according to claim 1, wherein The target data includes at least one of ambient temperature, return water temperature of the heat pump unit, outlet water temperature of the heat pump unit, defrost status flag information of the heat pump unit, return water temperature set value, and return difference temperature set value of the heat pump unit.

4. The method according to claim 2, wherein The periodic operation characteristics include at least one of the compressor start time, the end time of the compressor off state, the time when the return water temperature of the heat pump unit reaches the peak after the compressor is turned off, the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off, the compressor off time, the start time of the period, the end time of the period, the average ambient temperature within the period, the average ambient temperature during the compressor on period, the characteristic ambient temperature, the total duration of the period, the duration of the compressor on within the period, the duration of the compressor off within the period, the total duration of the compressor start and stop within the period, the set value of the return water temperature, the characteristic heat consumption duration, the characteristic heat supply number, the characteristic temperature accumulation, the characteristic temperature rise rate, the unit characteristic heat production, the unit characteristic heat loss, and the average heat production temperature difference. Among them, the characteristic ambient temperature is a characteristic parameter used to classify the level of the outdoor ambient temperature. The characteristic heat consumption duration is used to characterize the rate of heat consumption of the remaining heat in the pipeline during the compressor off period of the heat pump heating system. The characteristic heat supply number is used to characterize the cumulative change information of the temperature difference between the supply and return water of the heat pump unit during the target operation period. The characteristic temperature accumulation is used to characterize the cumulative change of the difference between the supply water temperature and the set return difference temperature of the heat pump unit during the target operation period. The characteristic temperature rise rate is used to characterize the rate of increase in the supply water temperature of the heat pump unit during the target operation period. The unit characteristic heat production is used to characterize the average value of the temperature difference between the supply and return water of the heat pump unit during the target operation period. The unit characteristic heat loss is used to characterize the relationship between the heat dissipation amount and the heat dissipation duration during the compressor stop stage of the heat pump unit in the heat pump heating system. The average heat production temperature difference is used to characterize the average value of the temperature difference between the supply and return water during the compressor on period of the heat pump unit.

5. The method according to claim 4, wherein Determining the numerical value of the periodic operation characteristics of the target operation period according to the multiple target data includes: If the periodic operation characteristics include the compressor start time, then determine the (z - 1)-th start and stop moment as the compressor start time; If the periodic operation characteristics include the end time of the compressor off state, then determine the j-th moment as the end time, where the start-stop information at the (j - 1)-th and j-th moments is off, and the start-stop information at the (j + 1)-th moment is on, or determine the latest acquisition time of the multiple target data of the target operation period as the end time; If the periodic operation characteristics include the time when the return water temperature of the heat pump unit reaches the peak after the compressor is turned off, then determine all the first target data that meet the return water temperature reversal criterion among the multiple target data, and determine the latest acquisition moment of all the first target data as the time when the return water temperature of the heat pump unit reaches the peak after the compressor is turned off. The return water temperature reversal means that the change trend of the return water temperature changes; If the periodic operation characteristics include the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off, then determine the latest acquisition time of the multiple target data of the target operation period as the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor is turned off; If the periodic operation feature includes the compressor shutdown time, determine the y-th moment as the compressor shutdown time, where the compressor is in the shutdown state at the y-th moment and the compressor is in the startup state at the (y - 1)-th moment; If the periodic operation feature includes the cycle start time, determine the (z - 1)-th start-stop moment as the cycle start time; If the periodic operation feature includes the cycle end time, determine the j-th moment as the cycle end time, where the start-stop information at the (j - 1)-th and j-th moments is shutdown, and the start-stop information at the (j + 1)-th moment is startup, or determine the latest acquisition time of multiple target data of the target operation cycle as the cycle end time; If the periodic operation feature includes the average ambient temperature within the cycle, determine the average ambient temperature according to the ambient temperature values of the multiple target data; If the periodic operation feature includes the average ambient temperature during the compressor startup time period, determine all second target data during the compressor startup time period from the multiple target data, and determine the average ambient temperature during the compressor startup time period according to the ambient temperature values of all the second target data; If the periodic operation feature includes the characteristic ambient temperature, determine the average ambient temperature within the cycle, and determine the characteristic ambient temperature according to the average ambient temperature within the cycle and the graduation value of the characteristic ambient temperature; If the periodic operation feature includes the total cycle duration, determine the cycle start time and the cycle end time, and determine the difference between the cycle start time and the cycle end time as the total cycle duration, or determine the end time of the compressor shutdown state and the compressor startup time, and determine the difference between the end time of the compressor shutdown state and the compressor startup time as the total cycle duration; If the periodic operation feature includes the compressor startup duration within the cycle, determine the compressor startup duration according to the difference between the compressor shutdown time and the compressor startup time or the product of the number of compressor startups and the deviation of the acquisition time step; If the periodic operation feature includes the compressor shutdown duration within the cycle, determine it as the compressor shutdown duration within the cycle according to the difference between the end time of the compressor shutdown state and the compressor shutdown time or the product of the number of compressor shutdowns and the deviation of the acquisition time step; If the periodic operation feature includes the total cycle startup and shutdown duration, determine the compressor startup duration within the cycle and the compressor shutdown duration within the cycle, and determine the sum of the compressor startup duration within the cycle and the compressor shutdown duration within the cycle as the total cycle startup and shutdown duration; If the periodic operation feature includes the return water temperature set value within the cycle, determine the return water temperature set value in the multiple target data as the return water temperature set value within the cycle; If the periodic operation feature includes a characteristic heat consumption duration, determine the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor shuts down, and determine the difference between the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor shuts down as the characteristic heat consumption duration; If the periodic operation feature includes a characteristic heat supply number, determine the characteristic heat supply number according to the return water temperature and the outlet water temperature of each target data among the multiple target data; If the periodic operation feature includes a characteristic temperature accumulation, determine the characteristic temperature accumulation according to the outlet water temperature, the set value of the return water temperature, and the set value of the dead band temperature of each target data among the multiple target data; If the periodic operation feature includes a characteristic temperature rise rate, determine the characteristic temperature rise rate according to the compressor start time, the outlet water temperature at the compressor start time, the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down, and the outlet water temperature at the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down; If the periodic operation feature includes a unit characteristic heat output, determine the unit characteristic heat output according to the return water temperature, the outlet water temperature of each target data among the multiple target data, and the total duration of the period; If the periodic operation feature includes a unit characteristic heat loss, determine the unit characteristic heat loss according to the return water temperature of each target data whose acquisition time is between the time when the return water temperature of the heat pump unit reaches the peak value after the compressor shuts down and the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down, and the time difference between the time when the return water temperature of the heat pump unit reaches the lowest value after the compressor shuts down and the time when the return water temperature of the heat pump unit reaches the peak value after the compressor shuts down; If the periodic operation feature includes an average heating temperature difference, determine the average heating temperature difference according to the return water temperature, the outlet water temperature of each target data whose acquisition time is between the compressor start time and the compressor shutdown time, and the time difference between the compressor shutdown time and the compressor start time; Among them, the (z - 1)-th start-stop moment is determined according to historical target data, z is an integer greater than 2, j is an integer greater than 2, and y is an integer greater than 2.

6. The method according to claim 1, characterized in that, The return water temperature adjustment condition includes simultaneously satisfying a low-temperature protection criterion, a cycle duration criterion, a parameter adjustment interval criterion, and a non-defrosting criterion.

7. The method according to claim 1, wherein The regulation criterion value includes a characteristic heat consumption duration criterion value. Among them, adjusting the set value of the return water temperature according to the regulation criterion value includes: Respectively determine the periodic change amount of the moving average value of the characteristic heat supply number, the periodic change amount of the characteristic heat consumption duration, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value, and the periodic change amount of the unit characteristic heat output, where the periodic change amount is determined according to the values of the current k-th target operation cycle and the (k - 1)-th target operation cycle, and k is an integer greater than 1; When the periodic change amount of the moving average of the characteristic heat consumption duration is less than 0, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value is less than 0, the periodic change amount of the characteristic heat supply number is greater than 0, and the periodic change amount of the unit characteristic heat production amount is greater than 0, the difference between the current return water temperature set value and the downward adjustment parameter increment value is determined as the updated return water temperature set value; When the periodic change amount of the moving average of the characteristic heat consumption duration is greater than 0, the difference between the characteristic heat consumption duration and the characteristic heat consumption duration criterion value is greater than 0, the periodic change amount of the characteristic heat supply number is less than 0, and the periodic change amount of the unit characteristic heat production amount is less than 0, the sum of the current return water temperature set value and the upward adjustment parameter increment value is determined as the updated return water temperature set value.

8. A return water temperature adjustment device for a heat pump unit, characterized in that, Including: The first determination module is used to determine a plurality of target data of the heat pump unit during the target operation period, and the heat pump unit is used to supply heat to the building; The second determination module is used to determine the numerical value of the periodic operation characteristics of the target operation period according to the plurality of target data, wherein the periodic operation characteristics are used to characterize the operation state of the heat pump unit and the heat supply state of the building; The third determination module is used to determine the category corresponding to the target operation period and the regulation criterion value of the category according to the numerical value of the periodic operation characteristics; The adjustment module is used to adjust the return water temperature set value according to the regulation criterion value under the condition of meeting the return water temperature adjustment condition, and the return water temperature set value is used to control the working state of the heat pump unit; Wherein, the category corresponding to the target operation period is determined according to the characteristic ambient temperature and the return water temperature, and the periodic operation characteristics include the characteristic ambient temperature and the return water temperature, Wherein, determining the category corresponding to the target operation period and the regulation criterion value of the category according to the numerical value of the periodic operation characteristics includes: Determining the category corresponding to the target operation period according to the characteristic ambient temperature value and the return water temperature set value at the current moment; Updating the regulation criterion value of the category according to the numerical value of the periodic operation characteristics of the target operation period; Wherein, updating the regulation criterion value of the category according to the numerical value of the periodic operation characteristics of the target operation period includes: Determining the average value of each parameter according to the numerical value of the periodic operation characteristics and the historical numerical value of the parameters of the regulation criterion of the category; Determining the regulation criterion value of the category according to the average value of each parameter, Wherein, the parameters of the regulation criterion include at least one of characteristic heat consumption duration, characteristic heat supply number, characteristic temperature accumulation, characteristic temperature rise rate, unit characteristic heat production amount, unit characteristic heat loss, and average heating temperature difference.

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