A control method for low temperature coupled heat pump

Abstract

The present invention provides a control method for a low-temperature coupled heat pump, including: comparing the current ambient temperature with a preset temperature, and switching the working mode of the low-temperature coupled heat pump to a target mode according to the comparison result; collecting the real-time working parameters and the real-time water temperature of the low-temperature coupled heat pump in real time; performing intelligent analysis based on the real-time working parameters and the real-time water temperature, and adaptively regulating the working parameters of the low-temperature coupled heat pump according to the intelligent analysis result. The present invention realizes the intelligent operation of the low-temperature coupled heat pump, and realizes the intelligent operation of the low-temperature coupled heat pump by adaptively regulating the working parameters of the low-temperature coupled heat pump through the real-time water temperature of the low-temperature coupled heat pump data, which greatly improves the operating energy efficiency of the system, achieves the purpose of energy saving and environmental protection, and also improves the operating reliability of the system, ensuring the stable operation of the unit.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent control of low-temperature coupled heat pumps, and in particular to a control method of a low-temperature coupled heat pump. Background Art

[0002] A heat pump is an efficient and energy-saving device that fully utilizes low-grade thermal energy. Its working principle is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse cycle. It consumes only a small amount of reverse cycle net work to obtain a large amount of heat supply, and can effectively utilize the difficult-to-use low-grade thermal energy to achieve energy saving. The low-temperature heat pump reduces the water supply temperature of the air source heat pump unit, which can effectively improve the low-temperature operation characteristics of the unit and expand the low-temperature operation range of the unit. However, the existing low-temperature air energy heat pump unit has problems with insufficient water outlet temperature and low energy efficiency when used at the end of traditional radiators. Therefore, the present invention proposes a control method for a low-temperature coupled heat pump. Summary of the invention

[0003] The present invention provides a control method for a low-temperature coupled heat pump to realize the intelligent operation of the low-temperature coupled heat pump. The working parameters of the low-temperature coupled heat pump are adaptively controlled by the real-time water temperature of the low-temperature coupled heat pump data to realize the intelligent operation of the low-temperature coupled heat pump, which greatly improves the operating energy efficiency of the system and achieves the purpose of energy saving and environmental protection. At the same time, it also improves the operating reliability of the system and ensures the stable operation of the unit.

[0004] The present invention provides a control method for a low-temperature coupled heat pump, comprising:

[0005] Compare the current ambient temperature with the preset temperature, and switch the working mode of the low-temperature coupled heat pump to the target mode according to the comparison result;

[0006] Real-time collection of real-time working parameters and real-time water temperature of low-temperature coupled heat pump;

[0007] Intelligent analysis is performed based on real-time working parameters and real-time water temperature, and the working parameters of the low-temperature coupled heat pump are adaptively controlled according to the results of the intelligent analysis.

[0008] Preferably, in a control method of a low-temperature coupled heat pump, the current ambient temperature is compared with a preset temperature, and according to the comparison result, the working mode of the low-temperature coupled heat pump is switched to a target mode, including:

[0009] Get the current ambient temperature, compare the current ambient temperature with the preset temperature, and obtain the ambient-set temperature difference and its corresponding temperature difference rate;

[0010] Based on the temperature difference rate, determining the urgency of temperature control corresponding to the current environment, and determining the target working mode of the low-temperature coupled heat pump according to the urgency of temperature control;

[0011] A mode switching instruction is generated based on the target working mode, and the mode switching instruction is sent to the central control module to control the low-temperature coupled heat pump to switch the working mode.

[0012] Preferably, in a control method of a low-temperature coupled heat pump, real-time acquisition of real-time operating parameters and real-time water temperature of the low-temperature coupled heat pump includes:

[0013] Automatically generate a target folder based on the data collection date, and store the real-time working parameters and real-time water temperature in the target folder for storage;

[0014] When the data collection date is changed, the target folder is automatically uploaded to the cloud for storage, and after the upload is completed, the target folder is automatically deleted and only the latest target folder is retained;

[0015] The file name of the target folder is the data collection date.

[0016] Preferably, in a control method for a low-temperature coupled heat pump, an intelligent analysis is performed based on real-time working parameters and real-time water temperature, and the working parameters of the low-temperature coupled heat pump are adaptively controlled according to the intelligent analysis results, including:

[0017] Based on the real-time water temperature, the output water temperature and the return water temperature are obtained, and the output water temperature and the return water temperature are compared with the preset water temperature to obtain the output temperature difference and the return temperature difference;

[0018] If the output temperature difference is greater than or equal to zero, the reflux heat consumption heat is obtained based on the reflux temperature difference and the preset water temperature, and the current heat loss level of the low-temperature coupled heat pump is determined according to the reflux heat consumption heat and in combination with the preset reflux heat loss level table, and the heat load and working mode of the low-temperature coupled heat pump are regulated based on the current heat loss level;

[0019] If the output temperature difference is less than zero, the working capacity of the compressor of the low-temperature coupled heat pump is regulated based on the output temperature difference.

[0020] Preferably, in a control method for a low temperature coupled heat pump, the method further includes:

[0021] Based on the historical output temperature difference and the historical return temperature difference, a return heat loss level table is generated. The specific method includes:

[0022] Obtain historical output temperature difference data and historical return temperature difference data corresponding to multiple acquisition dates, and synchronously generate multiple temperature difference data sets;

[0023] Based on the seasonal correlation and date correlation corresponding to the seasons of each collection date, the data correlation between each temperature difference data set is determined, and the historical return temperature differences in each temperature data set are compared to obtain the temperature difference mutation points corresponding to each date;

[0024] Based on the data association relationship and the similarity between the temperature mutation points corresponding to each date, multiple temperature difference data sets are clustered to obtain multiple temperature difference data clusters;

[0025] Based on the historical output temperature difference data and the historical return temperature difference data, the real-time output-return temperature difference corresponding to different acquisition dates is determined, and the temperature difference change curve is generated;

[0026] Based on the temperature difference mutation points, all the temperature difference change curves contained in the temperature difference data cluster are segmented to obtain temperature difference change sub-curves, and the starting points of the temperature difference change sub-curves are aligned;

[0027] Based on the alignment results, the temperature difference change characteristics corresponding to different time periods are compared, and based on the temperature difference change characteristics and combined with a preset heat algorithm, the average reflux heat loss corresponding to different temperature difference change sub-curves is obtained;

[0028] Based on the preset seasonal classification, the temperature difference data clusters are classified to obtain seasonal data sets, and the average heat loss of all temperature difference change sub-curves corresponding to each seasonal data set are obtained respectively, and the average reflux heat loss of all temperature difference change sub-curves are sorted. According to the sorting results, the levels are divided in combination with the preset level interval lengths to obtain multiple reflux heat loss levels and their corresponding interval ranges;

[0029] Get all the return heat loss levels corresponding to all seasonal data sets and generate a return heat loss level table.

[0030] Preferably, in a control method for a low-temperature coupled heat pump, all return heat loss levels corresponding to all seasonal data sets are obtained, and a return heat loss level table is generated, which also includes:

[0031] Obtain the real-time ambient temperature, real-time output flow and its corresponding output-return temperature difference for multiple collection dates corresponding to different seasons;

[0032] Based on the output flow rate, a plurality of data sets with the same flow rate are obtained, and the data in the data sets with the same flow rate are compared to obtain the first change characteristic of the output-return temperature difference under different ambient temperatures;

[0033] Classify based on ambient temperature, obtain multiple data sets with the same temperature, and compare the data in the data sets with the same temperature to obtain the second change characteristic of the output-return temperature difference under different flow rates;

[0034] Based on the first change characteristic and the second change characteristic, the influence characteristics of the ambient temperature and flow rate on the output-return temperature difference in the same season are determined.

[0035] Based on the influencing characteristics and the output-reflux temperature difference range corresponding to the average reflux heat loss range corresponding to each reflux heat loss level, the optimal control flow rate for each reflux heat loss level is determined respectively.

[0036] Preferably, in a control method of a low-temperature coupled heat pump, based on the impact characteristics and in combination with the output-return temperature difference range corresponding to the average return heat loss range corresponding to each return heat loss level, the optimal control flow rate for each return heat loss level is determined respectively, including:

[0037] Obtain the output--reflux temperature difference range corresponding to the average reflux heat loss range corresponding to each reflux heat loss level, and round the output--reflux temperature difference range to obtain multiple simulation temperatures;

[0038] Based on the impact characteristics, a heat load control simulation is performed for each simulated temperature, and the flow control critical points corresponding to different simulated temperatures are determined according to the simulation results;

[0039] Obtaining flow control critical points corresponding to multiple simulated temperatures within the same output-reflux temperature difference range, and sorting the flow control critical points to obtain a critical point sequence;

[0040] Based on the critical point sequence, the center value of the sequence is obtained as the optimal control flow rate of the reflux heat loss level corresponding to the current output-reflux temperature difference range.

[0041] Preferably, in a control method of a low-temperature coupled heat pump, based on the current heat loss level, regulating the heat load and the working mode of the low-temperature coupled heat pump includes:

[0042] Obtaining the optimal control flow corresponding to the heat loss level, and adjusting the output flow of the low-temperature coupled heat pump to the optimal control flow, thereby completing the control of the heat load of the low-temperature coupled heat pump;

[0043] If the current working mode is a coupled working mode, the working mode is adjusted to a single-machine working mode;

[0044] Otherwise, keep the current working mode.

[0045] Preferably, in a control method of a low-temperature coupled heat pump, regulating the working capacity of a compressor of the low-temperature coupled heat pump based on the output temperature difference includes:

[0046] Obtaining the corresponding relationship between the current compressor operating frequency of the low-temperature coupled heat pump and the heating rate of the low-temperature coupled heat pump;

[0047] Based on the ratio between the current output temperature difference and the preset temperature, a temperature error rate is obtained, and based on the temperature error rate and the preset heating time, the available time for heating the current output temperature difference to the preset temperature is determined;

[0048] According to the available time and the current output temperature difference, the expected heating rate is obtained, based on the heating rate and the corresponding relationship, the optimal operating frequency of the compressor of the low-temperature coupled heat pump is determined, and a compression frequency control instruction is generated;

[0049] Based on the compression frequency control instruction, the compressor operating frequency of the low-temperature coupled heat pump is adjusted to the optimal operating frequency.

[0050] Preferably, in a control method of a low temperature coupled heat pump, it also includes:

[0051] Obtaining a user's remote control instruction based on a remote module, and adjusting a preset temperature of a low-temperature coupled heat pump according to the remote control instruction;

[0052] Based on the remote control module, the working parameters, output water temperature and return water temperature of the low-temperature coupled heat pump are obtained in real time and sent to the remote control terminal for synchronous display.

[0053] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0054] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0056] Figure 1 This is a flow chart of a control method for a low-temperature coupled heat pump in an embodiment of the present invention;

[0057] Figure 2 This is a flow chart of step 1 of a control method for a low-temperature coupled heat pump in an embodiment of the present invention;

[0058] Figure 3 This is a flow chart of step 2 of a method for controlling a low-temperature coupled heat pump in an embodiment of the present invention;

[0059] Figure 4 This is a flow chart of step 3 of a method for controlling a low-temperature coupled heat pump in an embodiment of the present invention. DETAILED DESCRIPTION

[0060] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0061] Embodiment 1:

[0062] The present invention provides a control method for a low temperature coupled heat pump, such as Figure 1 As shown, including:

[0063] Step 1: Compare the current ambient temperature with the preset temperature, and switch the working mode of the low-temperature coupled heat pump to the target mode according to the comparison result;

[0064] Step 2: Real-time collection of real-time working parameters and real-time water temperature of the low-temperature coupled heat pump;

[0065] Step 3: Perform intelligent analysis based on real-time working parameters and real-time water temperature, and adaptively adjust the working parameters of the low-temperature coupled heat pump according to the results of the intelligent analysis.

[0066] In this embodiment, the working modes include a coupled working mode and a stand-alone working mode.

[0067] In this embodiment, the operating parameters include the compressor operating frequency, output flow rate, etc. The real-time water temperature includes the output water temperature, the return water temperature and the preset temperature.

[0068] The beneficial effects of the above technical solution are as follows: the present invention compares the current ambient temperature with the preset temperature, and according to the comparison result, switches the working mode of the low-temperature coupled heat pump to the target mode, so as to realize automatic control of the working mode of the low-temperature coupled heat pump; then collects the real-time working parameters and the real-time water temperature of the low-temperature coupled heat pump in real time, realizes real-time monitoring of the low-temperature coupled heat pump data and realizes real-time working data feedback; and performs intelligent analysis based on the real-time working parameters and the real-time water temperature, and according to the intelligent analysis results, performs adaptive control on the working parameters of the low-temperature coupled heat pump, realizes the intelligent operation of the low-temperature coupled heat pump, greatly improves the operating energy efficiency of the system, realizes the purpose of energy saving and environmental protection, improves the operating reliability of the system, and ensures the stable operation of the unit.

[0069] Embodiment 2:

[0070] Based on Example 1, step 1: compare the current ambient temperature with the preset temperature, and according to the comparison result, switch the working mode of the low-temperature coupled heat pump to the target mode, such as Figure 2 As shown, including:

[0071] Step 101: Obtain the current ambient temperature, compare the current ambient temperature with the preset temperature, and obtain the ambient-set temperature difference and its corresponding temperature difference rate;

[0072] Step 102: determining the urgency of temperature control corresponding to the current environment based on the temperature difference rate, and determining a target operating mode of the low-temperature coupled heat pump according to the urgency of temperature control;

[0073] Step 103: Generate a mode switching instruction based on the target working mode, and send the mode switching instruction to the central control module to control the low-temperature coupled heat pump to switch the working mode.

[0074] In this embodiment, the environment-set temperature difference refers to the difference between the current environment temperature and the preset temperature.

[0075] In this embodiment, the temperature difference rate refers to the ratio of the environment-set temperature difference to the preset temperature. The greater the temperature difference rate, the greater the urgency of temperature control. When the urgency of temperature control reaches the preset value, the target working mode is the coupled working mode, otherwise it is the single-machine working mode.

[0076] The beneficial effects of the above technical solution are as follows: the present invention obtains the environment-set temperature difference and its corresponding temperature difference rate through the current environment temperature and the preset temperature, and then determines the urgency of temperature control corresponding to the current environment based on the temperature difference rate, and determines the target working mode of the low-temperature coupled heat pump according to the urgency of temperature control, and finally generates a mode switching instruction based on the target working mode, and sends the mode switching instruction to the central control module to control the low-temperature coupled heat pump to switch the working mode, thereby realizing the automatic control of the startup working mode of the low-temperature coupled heat pump and improving the intelligence of the startup stage of the low-temperature coupled heat pump.

[0077] Embodiment 3:

[0078] Based on Example 1, step 2: real-time collection of real-time working parameters and real-time water temperature of the low-temperature coupled heat pump, such as Figure 3 As shown, including;

[0079] Step 201: automatically generating a target folder based on the data collection date, and storing the real-time working parameters and the real-time water temperature in the target folder for storage;

[0080] Step 202: When the data collection date is changed, the target folder is automatically uploaded to the cloud for storage, and after the upload is completed, the target folder is automatically deleted and only the latest target folder is retained;

[0081] The file name of the target folder is the data collection date.

[0082] In this embodiment, the data collection date includes the year, month and day when the data is collected.

[0083] The beneficial effects of the above technical solution: the present invention automatically generates a target folder based on the data collection date, and stores the real-time working parameters and the real-time water temperature in the target folder for storage, thereby realizing automatic sorting and storage of collected data, and automatically uploading the target folder to the cloud for storage when a change is sent on the data collection date, and automatically deleting the target folder after the upload is completed, retaining only the latest target folder, thereby reducing the demand for storage capacity of the low-temperature coupled heat pump, and can effectively reduce the risk of system freeze or slow operation caused by excessive and untimely deletion of collected data.

[0084] Embodiment 4:

[0085] Based on Example 1, step 3: perform intelligent analysis based on real-time working parameters and real-time water temperature, and adaptively control the working parameters of the low-temperature coupled heat pump according to the results of the intelligent analysis, such as Figure 4 Shown, including

[0086] Step 301: based on the real-time water temperature, obtaining the output water temperature and the return water temperature, respectively comparing the output water temperature and the return water temperature with the preset water temperature, to obtain the output temperature difference and the return temperature difference;

[0087] Step 302: If the output temperature difference is greater than or equal to zero, the reflux heat consumption heat is obtained based on the reflux temperature difference and the preset water temperature, and the current heat loss level of the low-temperature coupled heat pump is determined according to the reflux heat consumption heat and in combination with the preset reflux heat loss level table, and the heat load and the working mode of the low-temperature coupled heat pump are regulated based on the current heat loss level;

[0088] If the output temperature difference is less than zero, the working capacity of the compressor of the low-temperature coupled heat pump is regulated based on the output temperature difference.

[0089] The beneficial effects of the above technical solution: the present invention obtains the output water temperature and the return water temperature based on the real-time water temperature, compares the output water temperature and the return water temperature with the preset water temperature, obtains the output temperature difference and the return temperature difference, and determines different low-temperature coupled heat pump control schemes according to the output temperature difference, and performs targeted control on the working parameters of the low-temperature coupled heat pump, which is beneficial to improve the accuracy of the low-temperature coupled heat pump control and effectively improve the energy efficiency of the low-temperature coupled heat pump.

[0090] In embodiment 5:

[0091] Based on Example 4, a control method for a low temperature coupled heat pump further includes:

[0092] Based on the historical output temperature difference and the historical return temperature difference, a return heat loss level table is generated. The specific method includes:

[0093] Obtain historical output temperature difference data and historical return temperature difference data corresponding to multiple acquisition dates, and synchronously generate multiple temperature difference data sets;

[0094] Based on the seasonal correlation and date correlation corresponding to the seasons of each collection date, the data correlation between each temperature difference data set is determined, and the historical return temperature differences in each temperature data set are compared to obtain the temperature difference mutation points corresponding to each date;

[0095] Based on the data association relationship and the similarity between the temperature mutation points corresponding to each date, multiple temperature difference data sets are clustered to obtain multiple temperature difference data clusters;

[0096] Based on the historical output temperature difference data and the historical return temperature difference data, the real-time output-return temperature difference corresponding to different acquisition dates is determined, and the temperature difference change curve is generated;

[0097] Based on the temperature difference mutation points, all the temperature difference change curves contained in the temperature difference data cluster are segmented to obtain temperature difference change sub-curves, and the starting points of the temperature difference change sub-curves are aligned;

[0098] Based on the alignment results, the temperature difference change characteristics corresponding to different time periods are compared, and based on the temperature difference change characteristics and combined with a preset heat algorithm, the average reflux heat loss corresponding to different temperature difference change sub-curves is obtained;

[0099] Based on the preset seasonal classification, the temperature difference data clusters are classified to obtain seasonal data sets, and the average heat loss of all temperature difference change sub-curves corresponding to each seasonal data set are obtained respectively, and the average reflux heat loss of all temperature difference change sub-curves are sorted. According to the sorting results, the levels are divided in combination with the preset level interval lengths to obtain multiple reflux heat loss levels and their corresponding interval ranges;

[0100] Get all the return heat loss levels corresponding to all seasonal data sets and generate a return heat loss level table.

[0101] In this embodiment, the temperature difference data set refers to a data set that includes all historical output temperature difference data and historical return temperature difference data on a certain collection date.

[0102] In this embodiment, the season association relationship refers to that the collection dates are considered to be in the same season, for example, spring means that the collection dates in March and April are both considered to be spring; the date association relationship refers to that the dates are adjacent, for example, January 1 and January 2.

[0103] In this embodiment, the data association includes a season association and a date association.

[0104] In this embodiment, the temperature mutation point refers to the stage in a day when the temperature suddenly changes. For example, the temperature may suddenly drop at 10 o'clock in the evening and the temperature may suddenly increase at 7 o'clock in the morning. It is related to the ambient temperature. The temperature mutation point may vary in different regions.

[0105] In this embodiment, the similarity between the temperature mutation points means that the shorter the time difference between different temperature mutation points, the higher the similarity, and the shorter the time difference, the lower the similarity.

[0106] In this embodiment, the temperature difference data cluster refers to a data cluster consisting of temperature difference data sets whose similarities between temperature mutation points are within a preset range and have data relationships.

[0107] In this embodiment, the real-time output-return temperature difference refers to the temperature difference between the output water temperature and the return water temperature.

[0108] In this embodiment, the starting point alignment refers to the alignment of the starting points of the curve segments.

[0109] In this embodiment, the temperature difference variation characteristic refers to the temperature difference variation characteristic between the output water temperature and the return water temperature in the corresponding curve segment.

[0110] In this embodiment, the preset season classification refers to the preset season division, generally spring is March, April, and May; summer is June, July, and August; autumn is September, October, and November; and winter is December, January, and February.

[0111] In this embodiment, the seasonal data set refers to a set of temperature difference data clusters whose collection dates are in the same season.

[0112] In this embodiment, the average heat loss refers to the value obtained by performing an integral operation on the temperature difference change sub-curve to obtain the heat loss value, and then performing a weighted average on the heat loss values ​​of the temperature difference change sub-curves that are aligned in the temperature difference data cluster.

[0113] In this embodiment, the preset level interval length refers to the preset value interval length corresponding to each reflux heat loss level, for example, 2, 3, 5, etc.

[0114] The beneficial effects of the above technical solution: The present invention generates a reflux heat loss grade table based on the historical output temperature difference and the historical reflux temperature difference. First, the temperature data sets of different collection dates are clustered by data correlation and the similarity of the temperature mutation points of each day to obtain temperature data clusters. Based on the historical output temperature difference data and the historical reflux temperature difference data, the real-time output-reflux temperature difference corresponding to the different collection dates is determined respectively to generate a temperature difference change curve; based on the temperature difference mutation points, all the temperature difference change curves contained in the temperature difference data cluster are segmented to obtain temperature difference change sub-curves, and the starting points of the temperature difference change sub-curves are aligned, and the average reflux heat loss of each group of aligned temperature difference change sub-curves is calculated. The temperature difference data clusters are classified according to the season, and a data set containing seven or five dark-part temperature difference data clusters of the same season is obtained. Then, the levels are divided according to the season and the preset level interval length, and multiple return heat loss levels and their corresponding interval ranges corresponding to each season are obtained. Finally, all return heat loss levels corresponding to all seasonal data sets are obtained, and a return heat loss level table is generated. According to the changes in the ambient temperature of the actual use area of ​​the low-temperature coupled heat pump, a return heat loss level table exclusive to the current area or user is generated, which is conducive to improving the adaptability of the heating control of the low-temperature coupled heat pump to the actual living environment of the user, improving the control accuracy of the low-temperature coupled heat pump, and enhancing the user experience.

[0115] Embodiment 6:

[0116] On the basis of Example 5, all the return heat loss levels corresponding to all the seasonal data sets are obtained, and the return heat loss level table is generated, which also includes:

[0117] Obtain the real-time ambient temperature, real-time output flow and its corresponding real-time output - return temperature difference for multiple collection dates corresponding to different seasons;

[0118] Based on the output flow rate, a plurality of data sets with the same flow rate are obtained, and the data in the data sets with the same flow rate are compared to obtain the first change characteristic of the output-return temperature difference under different ambient temperatures;

[0119] Classify based on ambient temperature, obtain multiple data sets with the same temperature, and compare the data in the data sets with the same temperature to obtain the second change characteristic of the output-return temperature difference under different flow rates;

[0120] Based on the first change characteristic and the second change characteristic, the influence characteristics of the ambient temperature and flow rate on the output-return temperature difference in the same season are determined.

[0121] Based on the influencing characteristics and the output-reflux temperature difference range corresponding to the average reflux heat loss range corresponding to each reflux heat loss level, the optimal control flow rate for each reflux heat loss level is determined respectively.

[0122] In this embodiment, the comprehensive data set refers to a data set including the output flow rates and the corresponding output-return flow temperature differences on multiple collection dates in a certain season.

[0123] In this embodiment, the same flow data set refers to a data set consisting of the real-time output-return flow temperature difference and its corresponding real-time ambient temperature with the same output flow and the same collection date in the same season.

[0124] In this embodiment, the first variation characteristic refers to the effect of the ambient temperature on the output-return temperature difference when the output flow is the same.

[0125] In this embodiment, the same temperature data set refers to a data set consisting of the real-time output-return flow temperature difference and its corresponding real-time output flow rate with the same ambient temperature and the same collection date in the same season.

[0126] In this embodiment, the second variation characteristic refers to the effect of the output flow rate on the output-return temperature difference when the ambient temperature is the same.

[0127] The beneficial effects of the above technical solution are as follows: the present invention obtains all reflux heat loss levels corresponding to all seasonal data sets, generates a reflux heat loss level table, and at the same time obtains the real-time ambient temperature, real-time output flow and its corresponding real-time output-reflux temperature difference of multiple collection dates corresponding to different seasons, and obtains different data combinations through different classification methods, and then obtains the change characteristics of the output-reflux temperature difference in different seasons affected by ambient temperature and output flow through the data set, so as to determine the influence characteristics of ambient temperature and flow on the output-reflux temperature difference in the same season, and then based on the influence characteristics, combined with the output-reflux temperature difference range corresponding to the average reflux heat loss range corresponding to each reflux heat loss level, respectively determine the optimal control flow for each reflux heat loss level, thereby improving the basis for rapid control of the output flow of the low-temperature coupled heat pump.

[0128] In embodiment 7:

[0129] On the basis of Example 6, based on the influencing characteristics and in combination with the output-return temperature difference range corresponding to the average reflow heat loss range corresponding to each reflow heat loss level, the optimal control flow rate for each reflow heat loss level is determined respectively, including:

[0130] Obtain the output--reflux temperature difference range corresponding to the average reflux heat loss range corresponding to each reflux heat loss level, and round the output--reflux temperature difference range to obtain multiple simulation temperatures;

[0131] Based on the impact characteristics, a heat load control simulation is performed for each simulated temperature, and the flow control critical points corresponding to different simulated temperatures are determined according to the simulation results;

[0132] Obtaining flow control critical points corresponding to multiple simulated temperatures within the same output-reflux temperature difference range, and sorting the flow control critical points to obtain a critical point sequence;

[0133] Based on the critical point sequence, the center value of the sequence is obtained as the optimal control flow rate of the reflux heat loss level corresponding to the current output-reflux temperature difference range.

[0134] In this embodiment, the flow control critical point refers to a node where the output-return temperature difference does not change when the flow increases or decreases.

[0135] In this embodiment, the sequence center value refers to the center value of the critical point sequence.

[0136] The beneficial effects of the above technical solution are as follows: the present invention obtains the output-return temperature difference range corresponding to the average return heat loss range corresponding to each return heat loss level, and rounds it within the output-return temperature difference range to obtain multiple simulated temperatures; based on the influencing characteristics, a heat load control simulation is performed on each simulated temperature, and according to the simulation results, the flow control critical points corresponding to different simulated temperatures are determined; the flow control critical points corresponding to multiple simulated temperatures within the same output-return temperature difference range are obtained, and the flow control critical points are sorted to obtain a critical point sequence; based on the critical point sequence, the center value of the sequence is obtained as the optimal control flow rate for the return heat loss level corresponding to the current output-return temperature difference range, thereby realizing the intelligent determination of the optimal control flow rate based on the actual situation in the low-temperature coupled heat pump experimental area.

[0137] In embodiment 8:

[0138] On the basis of Example 6, based on the current heat loss level, the heat load and the working mode of the low temperature coupled heat pump are regulated, including:

[0139] Obtaining the optimal control flow corresponding to the heat loss level, and adjusting the output flow of the low-temperature coupled heat pump to the optimal control flow, thereby completing the control of the heat load of the low-temperature coupled heat pump;

[0140] If the current working mode is a coupled working mode, the working mode is adjusted to a single-machine working mode;

[0141] Otherwise, keep the current working mode.

[0142] Beneficial effects of the above technical solution: After the output water temperature reaches the standard, the present invention completes the regulation of the heat load of the low-temperature coupled heat pump by controlling the flow of the low-temperature coupled heat pump, realizes precise control, minimizes the reflux temperature difference, improves the energy efficiency of the low-temperature coupled heat pump, and switches and adjusts the current working mode accordingly, which can effectively reduce heating energy consumption.

[0143] In embodiment 9:

[0144] On the basis of Example 6, the working capacity of the compressor of the low-temperature coupled heat pump is regulated based on the output temperature difference, including:

[0145] Obtaining the corresponding relationship between the current compressor operating frequency of the low-temperature coupled heat pump and the heating rate of the low-temperature coupled heat pump;

[0146] Based on the ratio between the current output temperature difference and the preset temperature, a temperature error rate is obtained, and based on the temperature error rate and the preset heating time, the available time for heating the current output temperature difference to the preset temperature is determined;

[0147] According to the available time and the current output temperature difference, the expected heating rate is obtained, based on the heating rate and the corresponding relationship, the optimal operating frequency of the compressor of the low-temperature coupled heat pump is determined, and a compression frequency control instruction is generated;

[0148] Based on the compression frequency control instruction, the compressor operating frequency of the low-temperature coupled heat pump is adjusted to the optimal operating frequency.

[0149] In this embodiment, the temperature error rate refers to the ratio of the current output temperature difference to the preset temperature.

[0150] In this embodiment, the preset heating time refers to the shortest time for the low temperature coupled heat pump water temperature to rise from zero degrees to different temperatures, which is obtained from the experiment before the low temperature coupled heat pump leaves the factory. The corresponding relationship between the compressor operating frequency of the current low temperature coupled heat pump and the heating rate of the low temperature coupled heat pump is the experimental data before leaving the factory.

[0151] In this embodiment, the available time refers to the product of the preset heating time corresponding to the current preset temperature and the temperature error rate.

[0152] In this embodiment, the expected heating rate refers to the ratio of the current output temperature difference to the available time.

[0153] Beneficial effects of the above technical solution: The present invention obtains the temperature error rate through the ratio between the current output temperature difference and the preset temperature, and determines the available time for heating the current output temperature difference to the preset temperature based on the temperature error rate and the preset heating time; obtains the expected heating rate based on the available time and the current output temperature difference, and then determines the optimal operating frequency of the compressor of the low-temperature coupled heat pump corresponding to the expected heating rate based on the corresponding relationship between the current compressor operating frequency of the low-temperature coupled heat pump and the heating rate of the low-temperature coupled heat pump, and generates a compression frequency control instruction; based on the compression frequency control instruction, adjusts the compressor operating frequency of the low-temperature coupled heat pump to the optimal operating frequency. Intelligent control of the compressor operating frequency is achieved when the output water temperature does not meet the standard, effectively speeding up the heating rate of the low-temperature coupled heat pump, and ensuring that the output water temperature of the low-temperature coupled heat pump can quickly reach the preset temperature in a short time.

[0154] In embodiment 10:

[0155] Based on Example 1, a control method for a low-temperature coupled heat pump further includes:

[0156] Obtaining a user's remote control instruction based on a remote module, and adjusting a preset temperature of a low-temperature coupled heat pump according to the remote control instruction;

[0157] Based on the remote control module, the working parameters, output water temperature and return water temperature of the low-temperature coupled heat pump are obtained in real time and sent to the remote control terminal for synchronous display.

[0158] The beneficial effects of the above technical solution are as follows: the present invention obtains the user's remote control instructions based on the remote module, and adjusts the preset temperature of the low-temperature coupled heat pump according to the remote control instructions, thereby realizing the corresponding remote control of the low-temperature coupled heat pump, which is convenient for the user to adjust the heating temperature in advance before entering the house; based on the remote control module, the working parameters, output water temperature, and return water temperature of the low-temperature coupled heat pump are obtained in real time and sent to the remote control terminal for synchronous display, which is beneficial for the user to timely understand the real-time working status of the low-temperature coupled heat pump.

[0159] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A control method for a low temperature coupled heat pump, characterized in that: include: Compare the current ambient temperature with the preset temperature, and switch the working mode of the low-temperature coupled heat pump to the target mode according to the comparison result; Real-time collection of real-time working parameters and real-time water temperature of low-temperature coupled heat pump; Based on the real-time working parameters and real-time water temperature, intelligent analysis is performed, and the working parameters of the low-temperature coupled heat pump are adaptively controlled according to the intelligent analysis results; Among them, intelligent analysis will be performed based on real-time working parameters and real-time water temperature. According to the results of intelligent analysis, the working parameters of the low-temperature coupled heat pump will be adaptively controlled, including Based on the real-time water temperature, the output water temperature and the return water temperature are obtained, and the output water temperature and the return water temperature are compared with the preset water temperature to obtain the output temperature difference and the return temperature difference; If the output temperature difference is greater than or equal to zero, the reflux heat consumption heat is obtained based on the reflux temperature difference and the preset water temperature, and the current heat loss level of the low-temperature coupled heat pump is determined according to the reflux heat consumption heat and in combination with the reflux heat loss level table, and the heat load and working mode of the low-temperature coupled heat pump are regulated based on the current heat loss level; If the output temperature difference is less than zero, the working capacity of the compressor of the low temperature coupled heat pump is regulated based on the output temperature difference; Based on the historical output temperature difference and the historical return temperature difference, a return heat loss level table is generated. The specific method includes: Obtain historical output temperature difference data and historical return temperature difference data corresponding to multiple acquisition dates, and synchronously generate multiple temperature difference data sets; Based on the seasonal correlation and date correlation corresponding to the seasons of each collection date, the data correlation between each temperature difference data set is determined, and the historical return temperature differences in each temperature data set are compared to obtain the temperature difference mutation points corresponding to each date; Based on the data association relationship and the similarity between the temperature mutation points corresponding to each date, multiple temperature difference data sets are clustered to obtain multiple temperature difference data clusters; Based on the historical output temperature difference data and the historical return temperature difference data, the real-time output-return temperature difference corresponding to different acquisition dates is determined, and the temperature difference change curve is generated; Based on the temperature difference mutation points, all the temperature difference change curves contained in the temperature difference data cluster are segmented to obtain temperature difference change sub-curves, and the starting points of the temperature difference change sub-curves are aligned; Based on the alignment results, the temperature difference change characteristics corresponding to different time periods are compared, and based on the temperature difference change characteristics and combined with a preset heat algorithm, the average reflux heat loss corresponding to different temperature difference change sub-curves is obtained; Based on the preset seasonal classification, the temperature difference data clusters are classified to obtain seasonal data sets, and the average heat loss of all temperature difference change sub-curves corresponding to each seasonal data set are obtained respectively, and the average reflux heat loss of all temperature difference change sub-curves are sorted. According to the sorting results, the levels are divided in combination with the preset level interval lengths to obtain multiple reflux heat loss levels and their corresponding interval ranges; Obtain all return heat loss levels corresponding to all seasonal data sets and generate a return heat loss level table; Among them, the similarity between temperature mutation points means that the shorter the time difference between different temperature mutation points, the higher the similarity, and the shorter the time difference, the lower the similarity.

2. A control method for a low temperature coupled heat pump according to claim 1, characterized in that: Compare the current ambient temperature with the preset temperature, and according to the comparison result, switch the working mode of the low temperature coupled heat pump to the target mode, including: Get the current ambient temperature, compare the current ambient temperature with the preset temperature, and obtain the ambient-set temperature difference and its corresponding temperature difference rate; Based on the temperature difference rate, determining the urgency of temperature control corresponding to the current environment, and determining the target working mode of the low-temperature coupled heat pump according to the urgency of temperature control; Generate a mode switching instruction based on the target working mode, and send the mode switching instruction to the central control module to control the low-temperature coupled heat pump to switch the working mode; The temperature difference rate refers to the ratio of the environment-set temperature difference to the preset temperature.

3. The control method of a low temperature coupled heat pump according to claim 1, characterized in that: Real-time collection of real-time working parameters of low-temperature coupled heat pump and real-time water temperature, including; Automatically generate a target folder based on the data collection date, and store the real-time working parameters and real-time water temperature in the target folder for storage; When the data collection date changes, the target folder is automatically uploaded to the cloud for storage, and after the upload is completed, the target folder is automatically deleted and only the latest target folder is retained; The file name of the target folder is the data collection date.

4. The control method of a low temperature coupled heat pump according to claim 1, characterized in that: Get all the return heat loss levels corresponding to all seasonal data sets, and generate a return heat loss level table, including: Obtain the real-time ambient temperature, real-time output flow and its corresponding output-return temperature difference for multiple collection dates corresponding to different seasons; Based on the output flow rate, a plurality of data sets with the same flow rate are obtained, and the data in the data sets with the same flow rate are compared to obtain the first change characteristic of the output-return temperature difference under different ambient temperatures; Classify based on ambient temperature, obtain multiple data sets with the same temperature, and compare the data in the data sets with the same temperature to obtain the second change characteristic of the output-return temperature difference under different flow rates; Based on the first change characteristic and the second change characteristic, the influence characteristics of the ambient temperature and flow rate on the output-return temperature difference in the same season are determined. Based on the influencing characteristics and the output-reflux temperature difference range corresponding to the average reflux heat loss range corresponding to each reflux heat loss level, the optimal control flow rate for each reflux heat loss level is determined respectively.

5. A control method for a low temperature coupled heat pump according to claim 4, characterized in that: Based on the influencing characteristics, combined with the output-return temperature difference range corresponding to the average return heat loss range corresponding to each return heat loss level, the optimal control flow rate for each return heat loss level is determined, including: Obtain the output--reflux temperature difference range corresponding to the average reflux heat loss range corresponding to each reflux heat loss level, and round the output--reflux temperature difference range to obtain multiple simulation temperatures; Based on the impact characteristics, a heat load control simulation is performed for each simulated temperature, and the flow control critical points corresponding to different simulated temperatures are determined according to the simulation results; Obtaining flow control critical points corresponding to multiple simulated temperatures within the same output-reflux temperature difference range, and sorting the flow control critical points to obtain a critical point sequence; Based on the critical point sequence, the center value of the sequence is obtained as the optimal control flow rate of the reflux heat loss level corresponding to the current output-reflux temperature difference range.

6. A control method for a low temperature coupled heat pump according to claim 4, characterized in that: Based on the current heat loss level, the heat load and the working mode of the low temperature coupled heat pump are regulated, including: Obtaining the optimal control flow corresponding to the heat loss level, and adjusting the output flow of the low-temperature coupled heat pump to the optimal control flow, thereby completing the control of the heat load of the low-temperature coupled heat pump; If the current working mode is a coupled working mode, the working mode is adjusted to a single-machine working mode; Otherwise, keep the current working mode.

7. A control method for a low temperature coupled heat pump according to claim 4, characterized in that: The compressor working capacity of the low temperature coupled heat pump is regulated based on the output temperature difference, including: Obtaining the corresponding relationship between the current compressor operating frequency of the low-temperature coupled heat pump and the heating rate of the low-temperature coupled heat pump; Based on the ratio between the current output temperature difference and the preset temperature, a temperature error rate is obtained, and based on the temperature error rate and the preset heating time, the available time for heating the current output temperature difference to the preset temperature is determined; According to the available time and the current output temperature difference, the expected heating rate is obtained, based on the heating rate and the corresponding relationship, the optimal operating frequency of the compressor of the low-temperature coupled heat pump is determined, and a compression frequency control instruction is generated; Based on the compression frequency control instruction, the compressor operating frequency of the low-temperature coupled heat pump is adjusted to the optimal operating frequency.

8. The control method of a low temperature coupled heat pump according to claim 1, characterized in that: Also includes: Obtaining a user's remote control instruction based on a remote module, and adjusting a preset temperature of a low-temperature coupled heat pump according to the remote control instruction; Based on the remote control module, the working parameters, output water temperature and return water temperature of the low-temperature coupled heat pump are obtained in real time and sent to the remote control terminal for synchronous display.

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