An energy-saving volumetric heat exchanger

Abstract

The present invention relates to the technical field of volumetric heat exchangers, and particularly to an energy-saving volumetric heat exchanger. The energy-saving volumetric heat exchanger includes a tank body, a layered structure, which includes a partition plate for separating the internal space of the tank body into different layers and each layer inlet and outlet connected to the tank body for controlling the inlet and outlet of fluids in different layers; a heat exchange element, a tube sheet box, a diversion structure and a control mechanism. The control mechanism includes a data analysis unit for determining the peak working time period of the heat exchanger and the degree of dispersion of the peak working time period to determine the working mode of the heat exchanger, a control unit for determining whether to turn on the lower-layer collaborative water supply mode, and an adjustment unit for determining whether to adjust the working process parameters of the heat exchanger. The present invention improves the accuracy of the working mode analysis of the energy-saving volumetric heat exchanger, and then improves the accuracy of the working process control of the energy-saving volumetric heat exchanger to achieve the energy-saving effect.

Description

Technical Field

[0001] The present invention relates to the technical field of volumetric heat exchangers, and in particular to energy-saving volumetric heat exchangers. Background Art

[0002] With the continuous development of industry, the demand for heat energy exchange in various industries continues to increase. For example, in industries such as chemical engineering, pharmaceuticals, and food processing, a large number of heat exchange devices are required to meet the process requirements of heating, cooling, evaporation, condensation, etc. during the production process. While traditional heat exchangers meet these demands, they consume a large amount of energy, which prompts people to seek more energy-saving heat exchange solutions. During the operation of traditional volumetric heat exchangers, due to the lack of effective energy-saving control measures, excessive energy consumption often occurs.

[0003] Chinese Patent Application Publication No.: CN113465411 B discloses a volumetric heat exchanger, which includes a tank body having a first cavity and a first outlet, and a first heating mechanism and a second heating mechanism having the same structure. The first heating mechanism and the second heating mechanism are uniformly arranged along the circumferential tangent of the tank body, and both have a second cavity. The second cavity is communicated with the first cavity. Both include a main body arranged on the tank body, a baffle arranged in the first cavity, a heating coil arranged in the second cavity, abutted against the baffle, having a second inlet and a second outlet. The first baffle is arranged at the entrance of the second cavity through a fastener, having a first inlet, and the second inlet and the second outlet pass through the first baffle. Through the above technical solution, the problem of maintaining the temperature stability of the flue gas before entering the SCR reactor in the prior art is solved.

[0004] It can be seen that the prior art has the problem of low accuracy in analyzing the working mode of the energy-saving volumetric heat exchanger, resulting in poor accuracy in controlling the working process of the energy-saving volumetric heat exchanger and causing resource waste. Summary of the Invention

[0005] Therefore, the present invention provides an energy-saving volumetric heat exchanger to overcome the problem in the prior art that low accuracy in analyzing the working mode of the energy-saving volumetric heat exchanger leads to poor accuracy in controlling the working process of the energy-saving volumetric heat exchanger and causes resource waste.

[0006] To achieve the above object, the present invention provides an energy-saving volumetric heat exchanger, including:

[0007] A tank body, which includes a shell for accommodating the internal heat exchange structure and fluid, and end caps located at both ends of the tank body for closing the tank body;

[0008] A layered structure, which includes a partition plate connected to the shell for separating the internal space of the tank body into different layers, and inlets and outlets for each layer connected to the tank body for controlling the inflow and outflow of fluids in different layers;

[0009] A heat exchange element, which is connected to the partition board, includes a coil pipe for realizing fluid circulation flow and a heat exchange plate for accelerating the heat exchange rate;

[0010] A tube sheet box, which is connected to the tank body and is used for fixing the heat exchange element;

[0011] A flow guiding structure, which includes a flow guiding plate connected to the tank body for guiding the fluid flow direction and a flow guiding pipe for controlling the fluid flow velocity;

[0012] A control mechanism, which is respectively connected to the layered structure and the flow guiding structure, includes a data acquisition unit for acquiring the historical heat supply data of the heat exchanger, a data analysis unit for determining the peak working time period of the heat exchanger and the dispersion degree of the peak working time period according to the historical heat supply data of the heat exchanger to determine the working mode of the heat exchanger, a control unit for determining whether to turn on the lower layer cooperative water supply mode according to the temperature drop rate of the upper layer fluid under the corresponding working mode, and an adjustment unit for determining whether to adjust the working process parameters of the heat exchanger according to the comparison result between the actual output flow rate and the preset output flow rate of the heat exchanger. The working process parameters of the heat exchanger include a preset flow rate average value and a preset consistency degree.

[0013] Further, each layer of inlet and outlet includes an upper layer heat medium inlet, an upper layer heat medium outlet, an upper layer heated fluid inlet, an upper layer heated fluid outlet, a lower layer heat medium inlet, a lower layer heat medium outlet, a lower layer heated fluid inlet, and a lower layer heated fluid outlet. Adjusting valves are installed at each layer of inlet and outlet.

[0014] Further, the data analysis unit determines the peak period of the heat exchanger working time according to the comparison result between the flow rate average value during the heat exchanger working time and the preset flow rate average value. When the flow rate average value during the heat exchanger working time is greater than the preset flow rate average value, it is determined that the working time is the peak period, or when the flow rate average value during the heat exchanger working time is less than or equal to the preset flow rate average value, it is determined that the working time is the low period.

[0015] Further, the preset flow rate average value is determined according to the flow rate average value during the heat exchanger working time within the first preset period.

[0016] Further, the data analysis unit determines the peak working time period of the heat exchanger according to the comparison result between the consistency degree of the heat exchanger peak period time within the first preset time and the preset consistency degree. When the consistency degree is greater than the preset consistency degree, it is determined that the working time of the heat exchanger is the peak working time period, or when the consistency degree is less than or equal to the preset consistency degree, it is determined that the working time of the heat exchanger is the low working time period.

[0017] Further, the data analysis unit determines the working mode of the heat exchanger according to the comparison result between the degree of dispersion of the peak working time period of the heat exchanger within the second preset time and the preset degree of dispersion. When the degree of dispersion is greater than the preset degree of dispersion, the working mode of the heat exchanger is determined to be the first mode, or when the degree of dispersion is less than or equal to the preset degree of dispersion, the working mode of the heat exchanger is determined to be the second mode.

[0018] Further, the control unit determines whether to activate the lower-layer collaborative water supply mode according to the comparison result between the temperature drop rate of the upper-layer fluid in the corresponding working mode and the preset drop rate. When the temperature drop rate of the upper-layer fluid in the corresponding working mode is greater than the preset drop rate, it is determined to activate the lower-layer collaborative water supply mode.

[0019] Further, the adjustment unit determines whether to adjust the working process parameters of the heat exchanger according to the comparison result between the actual output flow rate of the heat exchanger within the second preset period and the preset output flow rate. When the actual output flow rate is less than the preset output flow rate, it is determined to adjust the working process parameters.

[0020] Further, the preset output flow rate is determined according to the average value of the actual output flow rates of the heat exchanger within several second preset periods.

[0021] Further, the preset flow rate average value is positively correlated with the growth rate of the peak working time period of the heat exchanger, the adjustment amount of the preset flow rate average value is negatively correlated with the actual output flow rate of the heat exchanger, and the adjustment amount of the preset consistency degree is negatively correlated with the actual output flow rate of the heat exchanger.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows. By distinguishing between peak periods and off-peak periods, during the off-peak period, since the flow rate average value is low, it means that the demand for hot water is small. At this time, the heat exchanger can reduce the consumption of heating power, reduce the supply of steam or heat medium, and avoid unnecessary heating of a large amount of hot water, thereby saving energy. During the peak period, when the flow rate average value is greater than the preset value, it indicates that the demand for hot water is strong. At this time, centralized energy supply is used to meet the hot water demand. This dynamic energy distribution method according to actual demand can, compared with traditional heat exchangers that operate at full load all the time without distinguishing time periods, more accurately use energy for hot water heating, reduce energy waste during non-peak demand periods, and improve energy utilization efficiency. Through the above method, the accuracy of the working mode analysis of the energy-saving volume heat exchanger is improved, and further the accuracy of the working process control of the energy-saving volume heat exchanger is improved to reduce the phenomenon of resource waste.

[0023] Further, in the present invention, when the degree of consistency is greater than the preset consistency, the heating power of the heat exchanger can be adjusted in advance to ensure sufficient hot water supply. During off-peak periods, energy input can be reduced, thereby achieving precise energy distribution. When the degree of consistency is low (less than or equal to the preset consistency), it is determined as the low-demand period, which means that the peak period of hot water demand is irregular. In this case, a large amount of hot water will not be prepared and excessive energy will not be invested according to a fixed peak mode, avoiding energy waste at unnecessary times and improving energy utilization efficiency.

[0024] Further, in the present invention, when the degree of dispersion during the peak working period is greater than the preset degree of dispersion, the first mode is adopted. In this mode, the temperature of the upper-layer fluid of the heat exchanger is set to four-fifths of the required temperature. This setting takes into account that during the peak period with a large degree of dispersion, the hot water demand time is not concentrated and relatively complex. By maintaining a relatively high but lower-than-required upper-layer water temperature, partial hot water demand can be quickly met during non-concentrated water use periods, without the need to heat a large amount of water from a lower temperature to the required temperature each time. When the degree of dispersion is less than or equal to the preset degree of dispersion, the second mode is adopted, and the upper-layer fluid temperature is set to three-fifths of the required temperature. In this case, since the peak period is relatively concentrated, there is more time to heat the lower-layer fluid to meet the concentrated hot water demand. The lower upper-layer water temperature setting can reduce energy consumption during the low-demand period because it is not necessary to keep the upper-layer water at a high temperature all the time. This mode can save energy with a lower upper-layer water temperature during off-peak periods and use the hot water in the lower layer to meet the concentrated demand during peak periods. Through the above methods, the accuracy of the working mode analysis of the energy-saving volume-type heat exchanger is improved, and further, the accuracy of the working process control of the energy-saving volume-type heat exchanger is improved to reduce the phenomenon of resource waste.

[0025] Furthermore, the present invention compares the temperature drop rate of the upper fluid with a preset drop rate. When the temperature drop rate is less than or equal to the preset value, the lower-layer collaborative water supply mode is not activated. This can avoid unnecessarily activating the lower-layer water supply when the hot water demand is low or the upper-layer hot water can meet the current demand. For example, during off-peak water usage hours, the temperature of the upper-layer hot water drops slowly, indicating that the upper-layer hot water can meet sporadic hot water demands at this time. Not activating the lower-layer water supply can reduce heat dissipation of the lower-layer hot water and energy consumption of equipment such as pumps, thereby achieving the purpose of energy conservation. When the temperature drop rate of the upper fluid is greater than the preset drop rate, the lower-layer collaborative water supply mode is activated, which ensures that when the hot water demand increases and the upper-layer hot water cannot meet the demand alone, hot water can be supplemented in a timely manner to ensure the stability of hot water supply. For example, during peak water usage hours, as a large amount of the upper-layer hot water is used, the temperature drops rapidly. At this time, activating the lower-layer collaborative water supply mode not only meets the hot water demands of users but also rationally utilizes the hot water in the upper and lower layers according to actual demands, avoiding energy waste caused by continuously activating the lower-layer water supply.

[0026] Furthermore, the present invention compares the actual output flow rate of the heat exchanger with the preset output flow rate within a second preset period, enabling timely detection of changes in hot water demand. When the actual output flow rate is less than the preset output flow rate, it indicates that the hot water demand has decreased. At this time, the working process parameters are adjusted so that the operation of the heat exchanger can better match the actual demand, avoiding overheating and energy waste. For example, in a hot water supply system in an office building, if the actual output flow rate is continuously lower than the preset value for a period of time, it may be because some tenants have reduced their hot water usage. By adjusting the parameters, the heating power of the heat exchanger can be reduced, thereby saving energy. According to the difference between the actual output flow rate and the preset output flow rate, the preset flow rate average value and the preset consistency degree are adjusted with an adjustment coefficient. Since the preset flow rate average value is positively correlated with the growth rate during the peak working period of the heat exchanger, and its adjustment amount is negatively correlated with the actual output flow rate, this means that when the actual output flow rate decreases, the preset flow rate average value will be appropriately reduced, so that the actual hot water demand peak can be more accurately identified when judging the peak and trough periods, avoiding excessive energy input during non-real peak periods. At the same time, the adjustment amount of the preset consistency degree is negatively correlated with the actual output flow rate. When the actual output flow rate decreases, the preset consistency degree will also be appropriately adjusted, making the judgment of the peak working period more in line with the actual situation and further optimizing energy distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the energy-saving volumetric heat exchanger according to an embodiment of the present invention;

[0028] Figure 2 is a working flow chart for determining the working mode of the heat exchanger in the energy-saving volumetric heat exchanger according to an embodiment of the present invention;

[0029] Figure 3 This is the flowchart for determining whether to activate the lower - layer collaborative water supply mode in the energy - saving volume - type heat exchanger according to an embodiment of the present invention;

[0030] Figure 4 This is the flowchart for determining whether to adjust the working process parameters of the heat exchanger in the energy - saving volume - type heat exchanger according to an embodiment of the present invention;

[0031] In the figure, 1 is the tube sheet box; 2 is the outer shell; 3 is the upper - layer heat medium inlet; 4 is the upper - layer heated fluid outlet; 5 is the partition plate; 6 is the lower - layer heat medium inlet; 7 is the lower - layer heated fluid outlet; 8 is the coil; 9 is the lower - layer heat medium outlet; 10 is the lower - layer heated fluid inlet; 11 is the heat - exchange plate; 12 is the upper - layer heat medium outlet; 13 is the upper - layer heated fluid inlet. Detailed implementation manners

[0032] In order to make the objectives and advantages of the present invention more clear and understandable, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0034] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0035] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] Please refer to Figures 1 - 4 as shown Figure 1 This is the structural schematic diagram of the energy - saving volume - type heat exchanger according to an embodiment of the present invention; Figure 2 This is the flowchart for determining the working mode of the heat exchanger in the energy - saving volume - type heat exchanger according to an embodiment of the present invention;

[0037] Figure 3 This is a flowchart for determining whether to activate the lower-layer collaborative water supply mode in the energy-saving volume heat exchanger according to an embodiment of the present invention; Figure 4 This is a flowchart for determining whether to adjust the working process parameters of the heat exchanger in the energy-saving volume heat exchanger according to an embodiment of the present invention.

[0038] The energy-saving volume heat exchanger according to an embodiment of the present invention includes:

[0039] A tank body, which includes a shell 2 for accommodating the internal heat exchange structure and fluid, and heads (not shown in the figure) located at both ends of the tank body for closing the tank body;

[0040] A layered structure, which includes a partition plate 5 connected to the shell for separating the internal space of the tank body into different layers, and inlets and outlets for each layer connected to the tank body for controlling the inflow and outflow of fluids in different layers;

[0041] A heat exchange element, which is connected to the partition plate 5 and includes a coil 8 for realizing the circulating flow of fluid and a heat exchange plate 11 for accelerating the heat exchange rate;

[0042] A tube sheet box 1, which is connected to the tank body for fixing the heat exchange element;

[0043] A flow guiding structure, which includes a flow guiding plate (not shown in the figure) connected to the tank body for guiding the flow direction of fluid and a flow guiding tube (not shown in the figure) for controlling the flow velocity of fluid;

[0044] A control mechanism, which is respectively connected to the layered structure and the flow guiding structure, and includes a data acquisition unit for acquiring the historical heating data of the heat exchanger, a data analysis unit for determining the peak working period and the degree of dispersion of the peak working period of the heat exchanger according to the historical heating data of the heat exchanger to determine the working mode of the heat exchanger, a control unit for determining whether to activate the lower-layer collaborative water supply mode according to the temperature drop rate of the upper-layer fluid under the corresponding working mode, and an adjustment unit for determining whether to adjust the working process parameters of the heat exchanger according to the comparison result between the actual output flow rate and the preset output flow rate of the heat exchanger. The working process parameters of the heat exchanger include a preset flow rate average value and a preset consistency degree.

[0045] The historical heating data in the embodiment of the present invention includes but is not limited to "the output flow rate of the heat exchanger, the working time of the heat exchanger, and the temperature of the fluid inside the heat exchanger".

[0046] Specifically, the inlets and outlets of each layer include an upper-layer heat medium inlet 3, an upper-layer heat medium outlet 12, an upper-layer heated fluid inlet 13, an upper-layer heated fluid outlet 4, a lower-layer heat medium inlet 6, a lower-layer heat medium outlet 9, a lower-layer heated fluid inlet 10, and a lower-layer heated fluid outlet 7. Adjusting valves (not shown in the figure) are installed at the inlets and outlets of each layer.

[0047] Specifically, the data analysis unit determines the peak period of the heat exchanger's working time according to the comparison result between the average flow rate during the heat exchanger's working time and the preset average flow rate.

[0048] If the average flow rate during the heat exchanger's working time is greater than the preset average flow rate, it is determined that the working time is the peak period.

[0049] If the average flow rate during the heat exchanger's working time is less than or equal to the preset average flow rate, it is determined that the working time is the off-peak period.

[0050] In the embodiment of the present invention, the preset average flow rate is determined based on the average flow rate during the heat exchanger's working time within the first preset period. The first preset period is set to 30 days, but the above value is not limited to this. Those skilled in the art can also adjust this value according to actual needs.

[0051] By distinguishing between the peak period and the off-peak period, in the off-peak period, since the average flow rate is low, it means that the demand for hot water is small. At this time, the heat exchanger can reduce the consumption of heating power, reduce the supply of steam or heat medium, and avoid unnecessary heating of a large amount of hot water, thereby saving energy. In the peak period, when the average flow rate is greater than the preset value, it indicates that the demand for hot water is strong. At this time, centralized energy supply is used to meet the hot water demand. This dynamic energy distribution method according to actual needs can more accurately use energy for hot water heating compared to traditional heat exchangers that operate at full load without time division, reduce energy waste during non-peak demand periods, and improve energy utilization efficiency. By the above method, the accuracy of the working mode analysis of the energy-saving volumetric heat exchanger is improved, and further the accuracy of the working process control of the energy-saving volumetric heat exchanger is improved to reduce the phenomenon of resource waste.

[0052] Specifically, the data analysis unit determines the peak working time period of the heat exchanger according to the comparison result between the consistency degree of the peak period time of the heat exchanger within the first preset time and the preset consistency degree.

[0053] If the consistency degree is greater than the preset consistency degree, it is determined that the working time of the heat exchanger is the peak working time period.

[0054] If the consistency degree is less than or equal to the preset consistency degree, it is determined that the working time of the heat exchanger is the off-peak working time period.

[0055] In the embodiment of the present invention, the first preset time is set to 20 days. The degree of consistency of the peak periods of the heat exchanger within the first preset time means that the frequency of the same time periods during the peak periods of the heat exchanger within the first preset time is greater than the preset frequency. The preset frequency is set to 0.75. For example, if within 20 days, there are 15 days when the same time period during the peak period of the heat exchanger is from 12:00 to 1:00, then the frequency of the same time periods during the peak periods of the heat exchanger within the first preset time is 0.75. The value of the preset degree of consistency is set to 0.78. However, the above values are not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0056] In the present invention, when the degree of consistency is greater than the preset degree of consistency, the heating power of the heat exchanger can be adjusted in advance to ensure sufficient hot water supply. During non-peak time periods, energy input can be reduced, thereby achieving precise energy distribution. When the degree of consistency is low (less than or equal to the preset degree of consistency), it is determined as a low-work period, which means that the peak periods of hot water demand are irregular. In this case, a large amount of hot water will not be prepared and excessive energy will not be invested according to a fixed peak mode, avoiding waste of energy at unnecessary times and improving energy utilization efficiency.

[0057] Specifically, the data analysis unit determines the working mode of the heat exchanger according to the comparison result between the dispersion degree of the peak working time periods of the heat exchanger within the second preset time and the preset dispersion degree.

[0058] If the dispersion degree is greater than the preset dispersion degree, it is determined that the working mode of the heat exchanger is the first mode.

[0059] If the dispersion degree is less than or equal to the preset dispersion degree, it is determined that the working mode of the heat exchanger is the second mode.

[0060] Among them, the preset dispersion degree is the average value of the dispersion degrees of the historical peak working time periods of the heat exchanger. However, the above values are not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0061] In the embodiment of the present invention, the degree of discreteness of the working peak time period can be achieved by sorting the data of the working peak time period. Each peak time period can be represented by a start time and an end time. For example, there are three peak time periods, namely [8:00-9:00], [13:00-14:00] and [19:00-20:00]. These data are used as samples for cluster analysis, and the K-Means clustering algorithm is used. The basic idea of ​​the algorithm is to divide the samples into K clusters so that the sum of the distances from each sample to the center of the cluster to which it belongs is minimized. Here, K can be set according to actual conditions. For example, you can first try to divide the peak time period into two clusters (K=2) to see whether you can distinguish relatively concentrated and dispersed peak time periods. After obtaining different clustering results through cluster analysis, calculate indicators such as the diameter of each cluster (the distance between the two farthest points in the cluster) or the average distance of samples within the cluster. If the diameter of the cluster is large or the average distance is large, it means that the peak periods in this cluster are relatively scattered, and it can be inferred that the degree of dispersion of the entire working peak period is large. The second preset time is set to 25 days, but the above value is not limited to this. Technical personnel in this field can also adjust the value according to actual needs.

[0062] In the embodiment of the present invention, the first mode is that the temperature of the upper fluid of the heat exchanger is set to the first temperature, and the second mode is that the temperature of the upper fluid of the heat exchanger is set to the second temperature. The first temperature is set to four-fifths of the required temperature, the second temperature is set to three-fifths of the required temperature, and the temperature of the lower fluid is set to the required temperature. However, the above values ​​are not limited to this, and technical personnel in this field can also adjust the values ​​according to actual needs.

[0063] In the present invention, when the degree of dispersion during the peak working period is greater than the preset degree of dispersion, the first mode is adopted. In this mode, the temperature of the upper-layer fluid of the heat exchanger is set to four-fifths of the required temperature. This setting takes into account that in the case of a large degree of dispersion during the peak period, the hot water demand time is not concentrated and relatively complex. By maintaining a relatively high but lower-than-required upper-layer water temperature, partial hot water demand can be quickly met during non-concentrated water use periods, without the need to heat a large amount of water from a lower temperature to the required temperature each time. When the degree of dispersion is less than or equal to the preset degree of dispersion, the second mode is adopted, and the temperature of the upper-layer fluid is set to three-fifths of the required temperature. In this case, since the peak period is relatively concentrated, there is more time to heat the lower-layer fluid to meet the concentrated hot water demand. The lower upper-layer water temperature setting can reduce energy consumption during the low period because there is no need to keep the upper-layer water at a high temperature all the time. This mode can save energy using the lower upper-layer water temperature during non-peak periods and meet the concentrated demand using the hot water in the lower layer during peak periods. Through the above method, the accuracy of the working mode analysis of the energy-saving volumetric heat exchanger is improved, and further the accuracy of the working process control of the energy-saving volumetric heat exchanger is improved to reduce the phenomenon of resource waste.

[0064] Specifically, the control unit determines whether to activate the lower-layer collaborative water supply mode according to the comparison result between the temperature drop rate of the upper-layer fluid in the corresponding working mode and the preset drop rate.

[0065] If the temperature drop rate of the upper-layer fluid in the corresponding working mode is greater than the preset drop rate, it is determined to activate the lower-layer collaborative water supply mode.

[0066] If the temperature drop rate of the upper-layer fluid in the corresponding working mode is less than or equal to the preset drop rate, it is determined not to activate the lower-layer collaborative water supply mode.

[0067] Among them, the preset drop rate is the historical average value of the upper-layer fluid drop speed in the same working mode of the heat exchanger, but the above value is not limited to this, and those skilled in the art can also adjust this value according to actual needs.

[0068] In the embodiment of the present invention, activating the lower-layer collaborative water supply mode can be achieved by opening the lower-layer inlet and outlet valves.

[0069] The present invention compares the temperature drop rate of the upper fluid with a preset drop rate. When the temperature drop rate is less than or equal to the preset value, the lower layer collaborative water supply mode is not activated. This can avoid unnecessarily activating the lower layer water supply when the hot water demand is low or the upper layer hot water can meet the current demand. For example, during off-peak water usage periods, the temperature drop rate of the upper layer hot water is slow, indicating that the upper layer hot water can meet sporadic hot water demands at this time. Not activating the lower layer water supply can reduce the heat loss of the lower layer hot water and the energy consumption of equipment such as pumps, thereby achieving the purpose of energy conservation. When the temperature drop rate of the upper fluid is greater than the preset drop rate, the lower layer collaborative water supply mode is activated, which ensures that when the hot water demand increases and the upper layer hot water alone cannot meet the demand, hot water can be supplemented in a timely manner to ensure the stability of hot water supply. For example, during peak water usage periods, as a large amount of the upper layer hot water is used, the temperature drops rapidly. At this time, activating the lower layer collaborative water supply mode not only meets the hot water demands of users but also rationally utilizes the hot water in the upper and lower layers according to actual needs, avoiding energy waste caused by continuously activating the lower layer water supply.

[0070] Specifically, the adjustment unit determines whether to adjust the working process parameters of the heat exchanger according to the comparison result between the actual output flow rate of the heat exchanger within a second preset period and the preset output flow rate.

[0071] If the actual output flow rate is less than the preset output flow rate, it is determined to adjust the working process parameters.

[0072] If the actual output flow rate is greater than or equal to the preset output flow rate, it is determined not to adjust the working process parameters.

[0073] In the embodiment of the present invention, the preset output flow rate is three-fifths of the average value of the actual output flow rates of the heat exchanger within several second preset periods. The second preset period is set to 35 days, but the above values are not limited to this. Those skilled in the art can also adjust these values according to actual needs.

[0074] Specifically, under the condition that the adjustment unit determines to adjust the working process parameters, it is determined to adjust the preset flow rate average value and the preset consistency degree with an adjustment coefficient.

[0075] In the embodiment of the present invention, the value range of the adjustment coefficient is set to 1.05 - 1.21. The preset flow rate average value is positively correlated with the growth rate during the peak working period of the heat exchanger. The adjustment amount of the preset flow rate average value is negatively correlated with the actual output flow rate of the heat exchanger. The adjustment amount of the preset consistency degree is negatively correlated with the actual output flow rate of the heat exchanger.

[0076] By comparing the actual output flow rate of the heat exchanger with the preset output flow rate within the second preset period, the present invention can timely detect changes in hot water demand. When the actual output flow rate is less than the preset output flow rate, it indicates that the hot water demand has decreased. At this time, the working process parameters are adjusted so that the operation of the heat exchanger can better match the actual demand, avoiding overheating and energy waste. For example, in a hot water supply system of an office building, if the actual output flow rate is continuously lower than the preset value for a period of time, it may be because some tenants have reduced their hot water usage. By adjusting the parameters, the heating power of the heat exchanger can be reduced, thereby saving energy. According to the difference between the actual output flow rate and the preset output flow rate, the preset flow rate average value and the preset consistency degree are adjusted with an adjustment coefficient. Since the preset flow rate average value is positively correlated with the growth rate during the peak working period of the heat exchanger, and its adjustment amount is negatively correlated with the actual output flow rate, this means that when the actual output flow rate decreases, the preset flow rate average value will be appropriately reduced, so that the actual hot water demand peak can be more accurately identified when judging the peak and trough periods, avoiding excessive energy input during non-real peak periods. At the same time, the adjustment amount of the preset consistency degree is negatively correlated with the actual output flow rate. When the actual output flow rate decreases, the preset consistency degree will also be appropriately adjusted, making the judgment of the peak working period more in line with the actual situation and further optimizing the energy distribution.

[0077] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0078] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving volumetric heat exchanger, characterized in that: include: The tank body includes a shell for accommodating the internal heat exchange structure and fluid and a head located at both ends of the tank body for sealing the tank body; A layered structure, comprising a partition plate connected to the shell to divide the internal space of the tank into different layers, and inlets and outlets of each layer connected to the tank to control the inlet and outlet of fluids in different layers; A heat exchange element connected to the barrier plate, comprising a coil for realizing fluid circulation and a heat exchange plate for accelerating the heat exchange rate; A tube sheet box, which is connected to the tank body and is used to fix the heat exchange element; A flow guiding structure, comprising a flow guiding plate connected to the tank body for guiding the flow direction of the fluid and a flow guiding pipe for controlling the flow speed of the fluid; A control mechanism, which is connected to the layered structure and the flow guiding structure respectively, and includes a data acquisition unit for acquiring historical heating data of the heat exchanger, a data analysis unit for determining the peak working time period of the heat exchanger and the discrete degree of the peak working time period according to the historical heating data of the heat exchanger to determine the working mode of the heat exchanger, a control unit for determining whether to start the lower layer coordinated water supply mode according to the temperature drop rate of the upper layer fluid under the corresponding working mode, and an adjustment unit for determining whether to adjust the working process parameters of the heat exchanger according to the comparison result of the actual output flow of the heat exchanger and the preset output flow, wherein the working process parameters of the heat exchanger include a preset flow mean value and a preset consistency degree; The data analysis unit determines the working mode of the heat exchanger according to the comparison result of the discrete degree of the working peak time period of the heat exchanger within the second preset time with the preset discrete degree, and determines that the working mode of the heat exchanger is the first mode under the condition that the discrete degree is greater than the preset discrete degree, or determines that the working mode of the heat exchanger is the second mode under the condition that the discrete degree is less than or equal to the preset discrete degree; The control unit determines whether to start the lower layer collaborative water supply mode based on the comparison result of the temperature drop rate of the upper layer fluid in the corresponding working mode and the preset drop rate, and determines to start the lower layer collaborative water supply mode under the condition that the temperature drop rate of the upper layer fluid in the corresponding working mode is greater than the preset drop rate.

2. The energy-saving volumetric heat exchanger according to claim 1, characterized in that: The inlets and outlets of each layer include an upper heat medium inlet, an upper heat medium outlet, an upper heated fluid inlet, an upper heated fluid outlet, a lower heat medium inlet, a lower heat medium outlet, a lower heated fluid inlet and a lower heated fluid outlet, and each layer of the inlets and outlets is equipped with a regulating valve.

3. The energy-saving volumetric heat exchanger according to claim 2, characterized in that: The data analysis unit determines the peak period of the heat exchanger working time based on the comparison result of the flow mean value during the heat exchanger working time and the preset flow mean value, determines the working time as the peak period under the condition that the flow mean value during the heat exchanger working time is greater than the preset flow mean value, or determines the working time as the trough period under the condition that the flow mean value during the heat exchanger working time is less than or equal to the preset flow mean value.

4. The energy-saving volumetric heat exchanger according to claim 3 is characterized in that: The preset flow rate mean value is determined according to the flow rate mean value during the working time of the heat exchanger in the first preset period.

5. The energy-saving volumetric heat exchanger according to claim 4, characterized in that: The data analysis unit determines the peak working time period of the heat exchanger based on the comparison result of the consistency degree of the peak time of the heat exchanger within the first preset time and the preset consistency degree, determines the working time of the heat exchanger as the peak working time period when the consistency degree is greater than the preset consistency degree, or determines the working time of the heat exchanger as the trough working time period when the consistency degree is less than or equal to the preset consistency degree.

6. The energy-saving volumetric heat exchanger according to claim 5, characterized in that: The adjustment unit determines whether to adjust the working process parameters of the heat exchanger based on the comparison result of the actual output flow of the heat exchanger with the preset output flow in the second preset period, and determines to adjust the working process parameters under the condition that the actual output flow is less than the preset output flow.

7. The energy-saving volumetric heat exchanger according to claim 6, characterized in that: The preset output flow is determined according to an average value of actual output flows of the heat exchanger within a plurality of second preset periods.

8. The energy-saving volumetric heat exchanger according to claim 7, characterized in that: The preset flow mean is positively correlated with the growth rate of the heat exchanger during the peak working period, the adjustment amount of the preset flow mean is negatively correlated with the actual output flow of the heat exchanger, and the adjustment amount of the preset consistency degree is negatively correlated with the actual output flow of the heat exchanger.

Images