An operating control method for a heating system

Abstract

The present invention provides an operation control method for a heating system, comprising a water reservoir, a first water source heat pump, a first heating zone, a second heating zone, a third heating zone, a second water source heat pump, a controller, a first wide channel isolating plate heat exchanger, a first air fin-tube heat exchanger, a second wide channel isolating plate heat exchanger, and a second air fin-tube heat exchanger. The water reservoir, the first air fin-tube heat exchanger, and the second air fin-tube heat exchanger serve as low-quality heat sources, which can improve the stability of the low-quality heat source supply. The first water source heat pump, the second heat source water pump, and the third heat source water pump can be used to achieve large temperature difference heating, thereby effectively reducing the energy consumption of the water pump. This heating system has the characteristics of low energy consumption and stable heat source. At the same time, when achieving large temperature difference heat exchange of reclaimed water, it can avoid the occurrence of local freezing and blockage of the heat pump.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy clean heating, and in particular to an operation control method of a heating system. Background Art

[0002] At present, there are various forms of heating in the field of new energy and clean heating technology, mainly including air source heat pump heating, river source heat pump heating, geothermal source heating, solar energy heating, etc.

[0003] The air source heat pump mainly includes equipment such as the evaporator, condenser, compressor, and throttling device. The compressor is driven by electric energy. The refrigerant is compressed and condensed by the compressor and condenser, then enters the evaporator to evaporate into a gaseous state and then enters the compressor, and the cycle continues. During the cycle, the refrigerant absorbs low-quality heat from the air and releases high-quality heat in the condenser to heat the return water. The air source heat pump heating system is widely used in southern my country because its main equipment is not restricted by the heat source and has flexible installation. However, it also has certain disadvantages. Currently, there are two main problems: 1. In extremely cold weather, the efficiency is low when the outdoor dry bulb temperature is below -12°C, and it is generally not applicable when it is below -35°C; 2. The evaporator is prone to frost when operating in extremely cold weather.

[0004] Unlike air-source heat pump systems, river-source heat pump systems use river water as a heat source, extracting heat from it using heat pump technology to heat the return water. Currently, this system is primarily affected by factors such as river water temperature and flow, and cannot guarantee stable and efficient heating during the heating season.

[0005] Geothermal heating systems utilize geothermal resources. By drilling shallow or medium-deep wells, a heat exchange medium is injected into the ground, extracting heat from the soil or groundwater. Heat is then extracted from the medium through a heat exchanger or heat pump to heat the return water. Currently, a major challenge is the need for regular heat replenishment to address the imbalance of underground heat.

[0006] Solar heating systems utilize sunlight, heat generated by solar collectors, and other reliable, clean heating methods to provide heating. They can be categorized into two types: solar air heating and solar hot water heating. Currently, the main obstacle hindering their development is the lack of stable hot water supply, which is affected by weather and nighttime temperatures. Therefore, they require complementary operation with other reliable, clean heating methods.

[0007] Traditional single-source sewage heat pump heating systems mostly use single-stage heat pumps to extract heat, and the heat source is a single heat source of discharged sewage. There are problems and risks such as low heat recovery rate due to low-quality sewage and unstable heating system caused by sewage shortage. At the same time, the temperature difference between the supply and return water of the heating system main pipe is within 10°C, and there are problems such as large demand for heating water and high energy consumption of water pumps. Summary of the Invention

[0008] The purpose of the present invention is to provide an operation control method for a heating system. The heating system has the characteristics of low energy consumption and stable heat source. At the same time, while realizing heat exchange with a large temperature difference of grey water, it can avoid the occurrence of local freezing and blockage of the heat pump.

[0009] The technical solution adopted by the present invention to solve its technical problem is: a method for controlling the operation of a heating system, including a water reservoir, a first water source heat pump, a first heating zone, a second heating zone, a third heating zone, a second water source heat pump, and a controller. The heating system also includes a first wide-channel isolation plate heat exchanger, a first air fin-tube heat exchanger, a second wide-channel isolation plate heat exchanger, and a second air fin-tube heat exchanger. A first pipeline is provided between the water reservoir, the first wide-channel isolation plate heat exchanger, and the second wide-channel isolation plate heat exchanger. The first pipeline is used to realize the first wide-channel isolation plate heat exchanger to supply water alone or the first wide-channel isolation plate heat exchanger and the second wide-channel isolation plate heat exchanger to water. Water is supplied in sequence, and a second pipeline for circulating heat exchange medium is provided between the first wide flow channel isolation plate heat exchanger, the first air fin-tube heat exchanger and the first water source heat pump. A third pipeline is provided between the first water source heat pump, the second water source heat pump, the first heating zone, the second heating zone and the third heating zone. The third pipeline is used to realize the circulating heating and heat release of heating water. A fourth pipeline for circulating heat exchange medium is provided between the second wide flow channel isolation plate heat exchanger, the second air fin-tube heat exchanger and the second water source heat pump. The controller is used to control the operation of the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the first water source heat pump and the second water source heat pump.

[0010] Preferably, the first pipeline includes a first water pump, a first pipe, a second pipe, a third pipe and a fourth pipe. The first pipe realizes the connection between the water reservoir and the water inlet port on the heat absorption side of the first wide-channel isolation plate heat exchanger. The first water pump is connected in series to the first pipe. The second pipe realizes the connection between the water outlet port on the heat absorption side of the first wide-channel isolation plate heat exchanger and the outside world. The third pipe and the fourth pipe realize the connection between the heat absorption side of the second wide-channel isolation plate heat exchanger and the second pipe. A thirteenth electric valve and a fourteenth electric valve are connected in series to the third pipe and the fourth pipe respectively. A fifteenth electric valve is arranged on the second pipe. The fifteenth electric valve is located downstream of the connection between the second pipe and the third pipe and upstream of the connection between the second pipe and the fourth pipe.

[0011] Furthermore, the second pipeline includes a fifth pipeline, a sixth pipeline, a seventh pipeline, an eighth pipeline, and a second water pump. The fifth pipeline and the sixth pipeline realize the connection between the heat release side of the first wide flow channel isolation plate heat exchanger and the heat absorption side of the first water source heat pump. The second water pump is arranged on the fifth pipeline. The seventh pipeline realizes the connection between the fifth pipeline and the water outlet end of the first air fin-tube heat exchanger, and the connection between the seventh pipeline and the fifth pipeline is located upstream of the second water pump. The eighth pipeline realizes the connection between the sixth pipeline and the water inlet end of the first air fin-tube heat exchanger. A nineteenth electric valve located upstream of the connection between the fifth pipeline and the seventh pipeline is connected in series to the fifth pipeline. A twentieth electric valve located downstream of the connection between the sixth pipeline and the eighth pipeline is connected in series to the sixth pipeline. A twenty-first electric valve and a twenty-second electric valve are respectively connected in series to the seventh pipeline and the eighth pipeline.

[0012] Furthermore, the third pipeline includes a ninth pipeline, a tenth pipeline, an eleventh pipeline, a twelfth pipeline, a third water pump, a fourth water pump, a fifth water pump, and a third water source heat pump. The ninth pipeline realizes the connection between the water outlet end of the heat release side of the first water source heat pump and the water inlet end of the second heating zone. The fourth water pump is connected in series to the ninth pipeline. The tenth pipeline realizes the connection between the ninth pipeline and the water inlet end of the first heating zone, and the connection between the ninth pipeline and the tenth pipeline is located upstream of the fourth water pump. The eleventh pipeline realizes the connection between the ninth pipeline and the water inlet end of the third heating zone. The connection between the eleventh pipeline and the ninth pipeline is located downstream of the fourth water pump, the fifth water pump is connected in series to the eleventh pipeline, the twelfth pipeline realizes the communication between the water outlet of the third heating zone and the water inlet of the heat release side of the first water source heat pump, the third water pump is connected in series to the twelfth pipeline, and the heat release side of the second water source heat pump is realized through the fifth pipeline and the circulation communication with the pipe section of the ninth pipeline located upstream of the connection between the ninth pipeline and the tenth pipeline, the fifth pipeline includes the thirteenth pipeline and the fourteenth pipeline, and the thirteenth pipeline and the fourteenth pipeline are respectively connected. A third electric valve and a fourth electric valve are connected in series respectively, and a second electric valve is connected in series on the ninth pipeline. The second electric valve is located downstream of the connection between the ninth pipeline and the thirteenth pipeline, and upstream of the connection between the ninth pipeline and the fourteenth pipeline. The water outlet of the first heating zone is connected to the eleventh pipeline through a fifteenth pipeline, and the water outlet of the second heating zone is connected to the eleventh pipeline through a sixteenth pipeline. The water inlet and water outlet on the heat release side of the third water source heat pump are connected to the eleventh pipeline through the seventeenth pipeline and the eighteenth pipeline respectively. A seventh electric valve is connected in series to the pipe section of the eleventh pipe located between the seventeenth pipe and the eighteenth pipe. The heat absorption side of the third water source heat pump is connected to the twelfth pipe through the nineteenth pipe and the twentieth pipe. An eighth electric valve is connected in series to the pipe section of the twelfth pipe located between the nineteenth pipe and the twentieth pipe. A sixth manual valve located upstream of the connection between the seventeenth pipe and the eleventh pipe is connected in series to the eleventh pipe. A fifth manual valve located upstream of the connection between the sixteenth pipe and the eleventh pipe is connected in series to the eleventh pipe.

[0013] Furthermore, the fourth pipeline includes a twenty-first pipeline, a twenty-second pipeline, a twenty-third pipeline, a twenty-fourth pipeline, and a sixth water pump. The twenty-first pipeline and the twenty-second pipeline realize the connection between the heat release side of the second wide flow channel isolation plate heat exchanger and the heat absorption side of the second water source heat pump. The sixth water pump is arranged on the twenty-first pipeline. The twenty-third pipeline realizes the connection between the twenty-first pipeline and the water outlet end of the second air fin-tube heat exchanger, and the connection between the twenty-first pipeline and the twenty-third pipeline is located upstream of the sixth water pump. The twenty-fourth pipeline realizes the connection between the twenty-second pipeline and the water inlet end of the second air fin-tube heat exchanger. A ninth electric valve located upstream of the connection between the twenty-first pipeline and the twenty-third pipeline is connected in series to the twenty-first pipeline. An eleventh electric valve located downstream of the connection between the twenty-second pipeline and the twenty-fourth pipeline is connected in series to the twenty-second pipeline. A tenth electric valve and a twelfth electric valve are respectively connected in series to the twenty-third pipeline and the twenty-fourth pipeline.

[0014] Furthermore, the heating system also includes an ethylene glycol coolant expansion tank, which is used to provide ethylene glycol coolant to the second pipeline and the fourth pipeline.

[0015] Furthermore, a first liquid level sensor is arranged in the water reservoir, a second temperature sensor is arranged on the second pipe, a sixth temperature sensor is arranged on the ninth pipe, a nineteenth temperature sensor is arranged on the fourth pipe, and a twelfth temperature sensor is arranged on the eleventh pipe and is located downstream of the fifth water pump.

[0016] The present invention also provides an operation control method for a heating system, including the above-mentioned heating system, the operation control method comprising the following steps:

[0017] S1 staff starts the controller;

[0018] S2 staff makes the controller enter the extreme cold weather operation mode in the middle of the heating season or the cold weather operation mode in the early and late heating season according to the heating cycle;

[0019] S2.1 When the controller enters the cold weather operation mode at the beginning and end of the heating season, the controller opens the fifteenth electric valve, the second electric valve, the seventh electric valve and the eighth electric valve, and closes the thirteenth electric valve, the fourteenth electric valve, the third electric valve and the fourth electric valve, and then starts the first water pump, the third water pump, the fourth water pump and the fifth water pump. After the first water pump, the third water pump, the fourth water pump and the fifth water pump are running, the staff sets the upper liquid level threshold H1 and the lower liquid level threshold H2 of the water reservoir, where H1>H2, sets the second pipe water temperature threshold T1, and sets the ninth pipe water temperature threshold T2. After setting the above parameters, the controller compares the liquid level value H3 monitored by the first liquid level sensor with H1 in real time, compares the temperature value T3 monitored by the second temperature sensor with T1 in real time, and compares the sixth liquid level value with H2 in real time. The monitored temperature value T4 of the temperature sensor is compared with T2; when comparing H3 with H1 and T3 with T1, when H3 < H1 or T3 < T1, the controller turns off the first water pump, so that the nineteenth electric valve and the twentieth electric valve are in the closed state, and at the same time, opens the twenty-first electric valve and the twenty-second electric valve, thereby making the first air fin-tube heat exchanger serve as the heat source; when H3 ≥ H1 and T3 ≥ T1, the controller opens the nineteenth electric valve and the twenty-first electric valve, and at the same time, makes the twenty-first electric valve and the twenty-second electric valve in the closed state, thereby making the water reservoir serve as the heat source; when comparing T4 with T2, when T4 ≥ T2, the controller turns off the second water pump and the first water source heat pump; when T4 < T2, the controller starts the second water pump and the first water source heat pump;

[0020] S2.2 When the controller enters the extreme cold weather operation mode in the middle of the heating season, the controller closes the 15th electric valve and the 2nd electric valve, and opens the 13th electric valve, the 14th electric valve, the 3rd electric valve, the 4th electric valve, the 7th electric valve and the 8th electric valve. Then, the first water pump, the third water pump, the fourth water pump and the fifth water pump start to operate. The staff sets the upper liquid level threshold H5 and the lower liquid level threshold H6 of the water reservoir, where H5>H6, sets the fourth pipe water temperature threshold T5, sets the ninth pipe water temperature threshold T6, and sets the eleventh pipe water temperature threshold T7. After setting the above parameters, the controller The liquid level values H7 and H5 monitored by the first liquid level sensor are compared in real time, the temperature values T8 and T5 monitored by the nineteenth temperature sensor are compared in real time, the temperature values T9 and T6 monitored by the sixth temperature sensor are compared in real time, and the temperature values T10 and T7 monitored by the twelfth temperature sensor are compared in real time. When comparing H7 and H5 and T8 and T5, if H7 < H5, the controller stops the first water pump, opens the twenty-first electric valve, the twenty-second electric valve, the tenth electric valve and the twelfth electric valve, and then closes the nineteenth electric valve, the twentieth electric valve, The ninth electric valve and the eleventh electric valve are in the closed state, and the second water pump and the first heat source water pump are started. At this time, the first air fin-tube heat exchanger and the second air fin-tube heat exchanger are used as heat sources. When H7≥H5, the controller opens the nineteenth electric valve, the twentieth electric valve, the second water pump and the first heat source water pump, and closes the twenty-first and twenty-second electric valves. On the basis of H7≥H5, when T8<T5, the controller closes the ninth electric valve and the eleventh electric valve, and opens the tenth electric valve and the twelfth electric valve. At this time, the water reservoir and the second air fin-tube heat exchanger are used as heat sources. At H On the basis of 7≥H5, when T8≥T5, the controller opens the ninth electric valve and the eleventh electric valve, and closes the tenth electric valve and the twelfth electric valve; at this time, the water reservoir serves as the heat source; when comparing T9 and T6, when T9≥T6, the sixth water pump and the second water source heat pump are in the off state, and when T9<T6, the sixth water pump and the second water source heat pump are in the started state; when comparing T10 and T7, when T10≥T7, the third water source heat pump is in the off state, and when T10<T7, the seventh electric valve and the eighth electric valve are closed, and then the third water source heat pump is turned on.

[0021] The beneficial effects of the present invention are:

[0022] Energy saving and efficiency improvement. The system uses a three-stage water-source heat pump to achieve dual operating modes with large temperature differences and low flow rates on both the reclaimed water side and the heating side. This not only further optimizes the hydraulic balance of the pipe network and increases its stability, but also further reduces water pump power consumption. The system has two operating modes: one for cold weather at the beginning and end of the heating season, and one for extremely cold weather in the middle of the heating season. The system can flexibly switch the system and control equipment to start and stop according to the external ambient temperature, which can effectively further reduce system power consumption.

[0023] Dual heat sources ensure more stable heating. This system uses a complementary energy method combining recycled water heat source and air energy heat source, solving the problem of poor heating effect caused by the instability of a single heat source in traditional single sewage source heat pump heating systems.

[0024] The system's first two heat pumps utilize wide-channel, isolated plate heat exchangers combined with water-source heat pump technology. This effectively achieves a large heat exchange temperature difference of over 10°C for the reclaimed water, eliminating the risks of localized freezing and cracking of heat pump equipment due to low reclaimed water temperatures, as well as corrosion and blockage caused by excessive reclaimed water impurities.

[0025] Stable heating. The heating user side adopts series and parallel connection to achieve effective heating for users with different terminal types such as radiators and floor heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 Schematic diagram of the system principle of the present invention;

[0028] Figure 2 This is the operation control logic diagram of the present invention;

[0029] In the figure: 11 water reservoir, 2 first water pump, 3 first electromagnetic thermal flowmeter, 4 first wide flow channel isolation plate heat exchanger, 5 second water pump, 6 first water source heat pump, 7 third water pump, 8 second electromagnetic thermal flowmeter, 9 first heating zone, 10 fourth water pump, 11 third electromagnetic thermal flowmeter, 12 second heating zone, 13 fifth water pump, 14 fourth electromagnetic thermal flowmeter, 15 third heating zone, 16 third water source heat pump, 17 second water source heat pump, 18 sixth water pump, 19 second wide flow channel isolation plate heat exchanger, 20 second air fin-tube heat exchanger, 21 ethylene glycol refrigerant expansion tank, 22 make-up water pump, 23 make-up water tank, 24 softened water treatment device, 25 first air fin-tube heat exchanger, 101 first temperature sensor, 102 second temperature sensor, 103 third temperature sensor, 104 fourth temperature sensor, 105 fifth temperature sensor, 106 sixth temperature sensor, 107 seventh temperature sensor, 108 eighth temperature sensor, 109 ninth temperature sensor, 110 tenth temperature sensor, 111 eleventh temperature sensor, 112 twelfth temperature sensor, 113 thirteenth temperature sensor, 114 fourteenth temperature sensor, 115 fifteenth temperature sensor, 116 sixteenth temperature sensor, 117 seventeenth temperature sensor, 118 eighteenth temperature sensor, 119 nineteenth temperature sensor, 120 twentieth temperature sensor, 121 twenty-first temperature sensor, 122 twenty-second temperature sensor, 123 twenty-third temperature sensor 124 twentieth temperature sensor, 125 twenty-fifth temperature sensor, 201 first pressure sensor, 202 second pressure sensor, 203 third pressure sensor, 204 fourth pressure sensor, 205 fifth pressure sensor, 206 sixth pressure sensor, 207 seventh pressure sensor, 208 eighth pressure sensor, 209 ninth pressure sensor, 210 tenth pressure sensor, 211 eleventh pressure sensor, 212 twelfth pressure sensor, 213 thirteenth pressure sensor, 214 fourteenth pressure sensor, 215 fifteenth pressure sensor, 216 sixteenth pressure sensor, 217 seventeenth pressure sensor, 218 eighteenth pressure sensor, 219 nineteenth pressure sensor, 220 20th pressure sensor, 221st pressure sensor, 222nd pressure sensor, 223nd pressure sensor, 224th pressure sensor, 225th pressure sensor, 301st liquid level sensor, 302nd electric valve, 303rd electric valve, 304th electric valve, 305th manual valve, 306th manual valve, 307th electric valve, 308th electric valve, 309th electric valve, 310th electric valve, 311th electric valve, 312th electric valve, 313th electric valve, 314th electric valve, 315th electric valve, 316th liquid level sensor, 317th liquid level sensor, 318th electric valve,319 The nineteenth electric valve, 320 The twentieth electric valve, 321 The twenty-first electric valve, 322 The twenty-second electric valve, 401 The first pipeline, 402 The second pipeline, 403 The third pipeline, 404 The fourth pipeline, 405 The fifth pipeline, 406 The sixth pipeline, 407 The seventh pipeline, 408 The eighth pipeline, 409 The ninth pipeline, 410 The tenth pipeline, 411 The eleventh pipeline, 412 The twelfth pipeline, 413 The thirteenth pipeline, 414 The fourteenth pipeline, 415 The fifteenth pipeline, 416 The sixteenth pipeline, 417 The seventeenth pipeline, 418 The eighteenth pipeline, 419 The nineteenth pipeline, 420 The twentieth pipeline, 421 The twenty-first pipeline, 422 The twenty-second pipeline, 423 The twenty-third pipeline, 424 The twenty-fourth pipeline, 425 The twenty-fifth pipeline, 426 The twenty-sixth pipeline, 427 The twenty-seventh pipeline. DETAILED DESCRIPTION

[0030] The following will be combined with specific embodiments and appendix Figure 1-2 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the embodiments described are only some preferred embodiments of the present invention, not all embodiments. Those skilled in the art may make similar modifications without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] The present invention provides a heating system such as Figure 1As shown, it includes a water reservoir 1, a first water source heat pump 6, a first heating zone 9, a second heating zone 12, a third heating zone 15, a second water source heat pump 17, a controller, a first wide flow channel isolation plate heat exchanger 4, a first air fin tube heat exchanger 25, a second wide flow channel isolation plate heat exchanger 19, and a second air fin tube heat exchanger 20. The water reservoir 1 is used to store the reclaimed water discharged from the sewage treatment plant. The first heating zone 9 and the second heating zone 12 are residential communities heated by radiators. The third heating zone 15 is a residential community heated by floor heating pipes. In the heating residential area, the water source heat pump, the isolation plate heat exchanger and the fin-tube heat exchanger are all known technical products in the art, so their structures are not described in detail here; a first pipeline is provided between the water reservoir 1, the first wide channel isolation plate heat exchanger 4 and the second wide channel isolation plate heat exchanger 19, and the first pipeline is used to realize the first wide channel isolation plate heat exchanger 4 to supply water alone or the first wide channel isolation plate heat exchanger 4 and the second wide channel isolation plate heat exchanger 19 to supply water in sequence. When the water reservoir 1 utilizes the first When the pipeline is able to supply water, it indicates that the reclaimed water in the water reservoir 1 can be used as a low-quality heat source; a second pipeline for heat exchange medium circulation is provided between the first wide flow channel isolation plate heat exchanger 4, the first air fin-tube heat exchanger 25 and the first water source heat pump 6. By rationally controlling the second pipeline by the controller, the first air fin-tube heat exchanger 25 can be used as a backup heat source, thereby improving the heat source supply stability of the first water source heat pump 6; between the first water source heat pump 6, the second water source heat pump 17, the first water source heat pump 6 and the second water source heat pump 17, the first water source heat pump 6 can be used as a backup heat source. A third pipeline is provided between the warm zone 9, the second heating zone 12 and the third heating zone 15. The third pipeline is used to realize the circulating heating and heat release of the heating water. A fourth pipeline for realizing the circulation of the heat exchange medium is provided between the second wide flow channel isolation plate heat exchanger 19, the second air fin-tube heat exchanger 20 and the second water source heat pump 17. By reasonably controlling the fourth pipeline by the controller, the second air fin-tube heat exchanger 20 can be used as a backup heat source, thereby improving the heat source supply stability of the second water source heat pump 17. The stable heat source supply of the first water source heat pump 6 and the second water source heat pump 17 is conducive to the stable heating of the heating water by the third pipeline, and then the stability of the heating. At the same time, the first water source heat pump 6 and the second water source heat pump 17 are used to realize large temperature difference heat exchange, which can effectively reduce the energy consumption of the water pump; the controller is used to control the operation of the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the first water source heat pump 6 and the second water source heat pump 17.

[0032] On the basis of the above embodiment, the specific implementation method of the first pipeline is as follows: the first pipeline includes a first water pump 2, a first pipeline 401, a second pipeline 402, a third pipeline 403 and a fourth pipeline 404, the first pipeline 401 realizes the connection between the water reservoir 1 and the water inlet port on the heat absorption side of the first wide flow channel isolation plate heat exchanger 4, and the recycled water discharged from the sewage treatment plant is transported to the water reservoir 1 through the pipeline, the first water pump 2 is connected in series to the first pipeline 401, and the second pipeline 402 realizes the connection between the water outlet port on the heat absorption side of the first wide flow channel isolation plate heat exchanger 4 and the outside world, that is, the water flowing out of the water outlet port on the heat absorption side of the first wide flow channel isolation plate heat exchanger 4 can be directly discharged to the outside world through the second pipeline 402, and the third pipeline 403 and the fourth pipeline 404 realize the connection between the heat absorption side of the second wide flow channel isolation plate heat exchanger 19 and the second pipeline 402 The third pipe 403 and the fourth pipe 404 are connected in series, and a thirteenth electric valve 313 and a fourteenth electric valve 314 are respectively connected in series. A fifteenth electric valve 315 is set on the second pipe 402. The fifteenth electric valve 315 is located downstream of the connection between the second pipe 402 and the third pipe 403 and upstream of the connection between the second pipe 402 and the fourth pipe 404. When the fifteenth electric valve is closed and the thirteenth electric valve 313 and the fourteenth electric valve 314 are opened, the water flowing out from the water outlet port on the heat absorption side of the first wide flow channel isolation plate heat exchanger 4 flows into the fourth pipe 404 through the water outlet port on the heat absorption side of the second wide flow channel isolation plate heat exchanger 19, and then flows out to the outside from the end of the second pipe 402. When the fifteenth electric valve is open and the thirteenth electric valve 313 and the fourteenth electric valve 314 are closed, the water in the second pipe 402 is directly discharged to the outside.

[0033] On the basis of the above embodiment, the specific implementation of the second pipeline is as follows: the second pipeline includes a fifth pipeline 405, a sixth pipeline 406, a seventh pipeline 407, an eighth pipeline 408, and a second water pump 5. The fifth pipeline 405 and the sixth pipeline 406 realize the connection between the heat release side of the first wide flow channel isolation plate heat exchanger 4 and the heat absorption side of the first water source heat pump 6. Specifically, the fifth pipeline 405 is used to circulate the water flow of the first wide flow channel isolation plate heat exchanger 4 to the first water source heat pump 6. The second water pump 5 is arranged on the fifth pipeline 405. The seventh pipeline 407 realizes the connection between the fifth pipeline 405 and the water outlet end of the first air fin-tube heat exchanger 25. The seventh pipeline 407 and the fifth pipeline 405 are connected, and the connection between the seventh pipeline 407 and the fifth pipeline 405 is located upstream of the second water pump 5. The eighth pipeline 408 realizes the connection between the sixth pipeline 406 and the water inlet end of the first air fin-tube heat exchanger 25. A nineteenth electric valve 319 located upstream of the connection between the fifth pipeline 405 and the seventh pipeline 407 is connected in series to the fifth pipeline 405. A twentieth electric valve 320 located downstream of the connection between the sixth pipeline 406 and the eighth pipeline 408 is connected in series to the sixth pipeline 406. A twenty-first electric valve 321 and a twenty-second electric valve 322 are connected in series to the seventh pipeline 407 and the eighth pipeline 408, respectively. When the nineteenth electric valve 319 and the twentieth electric valve 320 are closed and the twenty-first electric valve 321 and the twenty-second electric valve 322 are opened, the first air fin-tube heat exchanger 25 serves as the heat source of the first water source heat pump 6; when the nineteenth electric valve 319 and the twentieth electric valve 320 are opened and the twenty-first electric valve 321 and the twenty-second electric valve 322 are closed, the first wide flow channel isolation plate heat exchanger 4 serves as the heat source of the first water source heat pump 6.

[0034] Furthermore, on the basis of the above embodiment, the specific implementation of the third pipeline is as follows: the third pipeline includes a ninth pipeline 409, a tenth pipeline 410, an eleventh pipeline 411, a twelfth pipeline 412, a third water pump 7, a fourth water pump 10, a fifth water pump 13, and a third water source heat pump 16, the ninth pipeline 409 realizes the connection between the outlet end of the heat release side of the first water source heat pump 6 and the water inlet end of the second heating zone 12, the fourth water pump 10 is connected in series to the ninth pipeline 409, and the tenth pipeline 410 realizes the connection between the ninth pipeline 409 and the water inlet end of the first heating zone 9. The water end is connected, and the connection between the ninth pipe 409 and the tenth pipe 410 is located upstream of the fourth water pump 10. The eleventh pipe 411 realizes the connection between the ninth pipe 409 and the water inlet end of the third heating zone 15, and the connection between the eleventh pipe 411 and the ninth pipe 409 is located downstream of the fourth water pump 10. The fifth water pump 13 is connected in series to the eleventh pipe 411. The twelfth pipe 412 realizes the connection between the water outlet end of the third heating zone 15 and the water inlet end of the heat release side of the first water source heat pump 6. The third water pump 7 is connected in series to the twelfth pipe 412. 410, the heat release side of the second water source heat pump 17 is circulated through the ninth pipeline 409 upstream of the connection between the ninth pipeline 409 and the tenth pipeline 410 through the fifth pipeline. The fifth pipeline includes a thirteenth pipeline 413 and a fourteenth pipeline 414. A third electric valve 303 and a fourth electric valve 304 are connected in series to the thirteenth pipeline 413 and the fourteenth pipeline 414 respectively. A second electric valve 302 is connected in series to the ninth pipeline 409. The second electric valve 302 is located downstream of the connection between the ninth pipeline 409 and the thirteenth pipeline 413, and upstream of the connection between the ninth pipeline 409 and the fourteenth pipeline 414. When the second electric valve 302 is closed and the third electric valve 303 and the fourth electric valve 304 are opened, the ninth pipeline 409 is circulated through the heat release side of the second water source heat pump 17. The water outlet of the first heating zone 9 is connected to the water outlet of the first heating zone 9 through a fifteenth pipeline 415. The eleventh pipe 411 is interconnected, the water outlet end of the second heating zone 12 is interconnected with the eleventh pipe 411 through a sixteenth pipe 416, the water inlet end and the water outlet end of the heat release side of the third water source heat pump 16 are interconnected with the eleventh pipe 411 through a seventeenth pipe 417 and an eighteenth pipe 418 respectively, a seventh electric valve 307 is connected in series to the pipe section of the eleventh pipe 411 located between the seventeenth pipe 417 and the eighteenth pipe 418, the heat absorption side of the third water source heat pump 16 is interconnected with the twelfth pipe 412 through a nineteenth pipe 419 and a twentieth pipe 420, an eighth electric valve 308 is connected in series to the pipe section of the twelfth pipe 412 located between the nineteenth pipe 419 and the twenty-first pipe 420, and a sixth manual valve 306 located upstream of the connection between the seventeenth pipe 417 and the eleventh pipe 411 is connected in series to the eleventh pipe 411.A fifth manual valve 305 is connected in series to the eleventh pipe 411, upstream of the connection between the sixteenth pipe 416 and the eleventh pipe 411. During the heating season, both the sixth and fifth manual valves 306 and 305 are normally open. When the third water-source heat pump 16 is required to heat the hot water in the eleventh pipe 411, the seventh and eighth electric valves 307 and 308 are closed, and the third water-source heat pump 16 is started. Conversely, the third water-source heat pump 16 is shut down, and the seventh and eighth electric valves 307 and 308 are opened.

[0035] Further, based on the above embodiment, a specific implementation of the fourth pipeline is as follows: the fourth pipeline includes a twenty-first pipeline 421, a twenty-second pipeline 422, a twenty-third pipeline 423, a twenty-fourth pipeline 424, and a sixth water pump 18, the twenty-first pipeline 421 and the twenty-second pipeline 422 realize the penetration of the heat release side of the second wide flow channel isolation plate heat exchanger 19 and the heat absorption side of the second water source heat pump 17, the sixth water pump 18 is arranged on the twenty-first pipeline 421, the twenty-third pipeline 423 realizes the penetration of the twenty-first pipeline 421 and the water outlet end of the second air fin-tube heat exchanger 20, and the connection between the twenty-first pipeline 421 and the twenty-third pipeline 423 is located upstream of the sixth water pump 18, and the twenty-fourth pipeline 424 realizes the penetration of the twenty-second pipeline 422 and the water inlet end of the second air fin-tube heat exchanger 20. A ninth electric valve 309 located upstream of the connection between the twenty-first pipeline 421 and the twenty-third pipeline 423 is connected in series to the twenty-first pipeline 421, an eleventh electric valve 311 located downstream of the connection between the twenty-second pipeline 422 and the twenty-fourth pipeline 424 is connected in series to the twenty-second pipeline 422, and a tenth electric valve 310 and a twelfth electric valve 312 are connected in series to the twenty-third pipeline 423 and the twenty-fourth pipeline 424 respectively. When the ninth electric valve 309 and the tenth electric valve 311 are opened and the tenth electric valve 310 and the twelfth electric valve 312 are closed, the second wide flow channel isolation plate heat exchanger 19 serves as the heat source of the second water source heat pump 17. When the ninth electric valve 309 and the tenth electric valve 311 are closed and the tenth electric valve 310 and the twelfth electric valve 312 are opened, the second air fin-tube heat exchanger 20 serves as the heat source of the second water source heat pump 17.

[0036] In order to facilitate the effective heat transfer of the first air fin-tube heat exchanger 25 and the second air fin-tube heat exchanger 20 in cold weather below zero degrees, the heat exchange medium in the second pipeline and the fourth pipeline is ethylene glycol refrigerant, and the second pipeline and the fourth pipeline use an ethylene glycol refrigerant expansion tank 21 to realize the supplementary supply of heat exchange medium. Specifically, the ethylene glycol refrigerant expansion tank 21 is connected with the twenty-second pipeline 422 through the twenty-fifth pipeline 425. At the same time, the ethylene glycol refrigerant expansion tank 21 is connected with the sixth pipeline 406 through the twenty-sixth pipeline 426.

[0037] Furthermore, in order to facilitate the monitoring of the operating conditions of each pipeline, a first temperature sensor 101, a first pressure sensor 201 and a first electromagnetic flowmeter 3 are provided in the first pipeline 401, a second temperature sensor 102 and a second pressure sensor 202 are provided at the water inlet end of the second pipeline 402, a twentieth temperature sensor 120 and a twentieth pressure sensor 220 are provided at the water outlet end of the second pipeline 402, an eighteenth temperature sensor 118 and an eighteenth pressure sensor 218 are provided on the third pipeline 403, a nineteenth temperature sensor 119 and a nineteenth pressure sensor 219 are provided on the fourth pipeline 404, and a third temperature sensor 103 and a third pressure sensor are provided on the fifth pipeline 405. 203, a fourth temperature sensor 104 and a fourth pressure sensor 204 are provided on the sixth pipe 406, a twenty-fifth temperature sensor 125 and a twenty-fifth pressure sensor 225 are provided on the eighth pipe 407, a twenty-fourth temperature sensor 124 and a twenty-fourth pressure sensor 224 are provided on the seventh pipe, a sixth temperature sensor 106 and a sixth pressure sensor 206 are provided on the ninth pipe 409 upstream of the connection between the ninth pipe 409 and the thirteenth pipe 413, a ninth temperature sensor 109 and a ninth pressure sensor 209 are provided on the ninth pipe 409 downstream of the connection between the ninth pipe 409 and the fourteenth pipe 414, and a third pressure sensor 209 is provided at the water outlet of the ninth pipe 409. The electromagnetic flowmeter 11 is provided with an eighth temperature sensor 108, an eighth pressure sensor 208, and a second electromagnetic flowmeter 8 on the tenth pipe 410; the eleventh temperature sensor 111 and the eleventh pressure sensor 211 are provided on the eleventh pipe 411 at the connection between the eleventh pipe 411 and the seventeenth pipe 417; the twelfth temperature sensor 112 and the twelfth pressure sensor 212 are provided on the eleventh pipe 411 downstream of the fifth water pump 13; a fourth electromagnetic flowmeter 14 is provided at the water outlet end of the eleventh pipe 411; a fifth temperature sensor 105 and a fifth pressure sensor 205 are provided at the water outlet end of the twelfth pipe 412; and a pressure sensor 212 is provided at the inlet end of the twelfth pipe 412. The water end is provided with a twenty-third temperature sensor 123 and a twenty-third pressure sensor 223. The twelfth pipe 412 is provided with a thirteenth temperature sensor 113 and a thirteenth pressure sensor 213 located downstream of the connection between the twenty-second pipe 412 and the nineteenth pipe 419. The thirteenth pipe 413 is provided with a fourteenth temperature sensor 114 and a fourteenth pressure sensor 214. The fourteenth pipe 414 is provided with a fifteenth temperature sensor 115 and a fifteenth pressure sensor 215. The fifteenth pipe 415 is provided with a seventh temperature sensor 107 and a seventh pressure sensor 207. The sixteenth pipe 416 is provided with a tenth temperature sensor 110 and a tenth pressure sensor 210.The 21st pipe 421 is provided with a 16th temperature sensor 116 and a 16th pressure sensor 216, the 20th pipe 422 is provided with a 17th temperature sensor 117 and a 17th pressure sensor 217, the 23rd pipe 423 is provided with a 21st temperature sensor 121 and a 21st pressure sensor 221, the 24th pipe 424 is provided with a 22nd temperature sensor 122 and a 22nd pressure sensor 222; the ethylene glycol coolant expansion tank 21 is provided with a 16th liquid level sensor 316; the 25th pipe 424 is provided with a 26th liquid level sensor 316; the 27th pipe 424 is provided with a 28th liquid level sensor 316; the 29th pipe 424 is provided with a 29th liquid level sensor 316; the 29th pipe 424 is provided with a 29th liquid level sensor 316; the 29th pipe 424 is provided with a 28 ... When three pipelines are in a heating cycle, a third pipeline water replenishment pipeline is provided to facilitate water replenishment of the third pipeline and effectively maintain water balance. The water replenishment pipeline includes a softening water treatment device 24, a water replenishment tank 23, and a water replenishment pump 22. The softening water treatment device 24 and the water replenishment tank 23 are connected by a pipeline, and an eighteenth electric valve 318 is provided on the pipeline. A seventeenth liquid level sensor 317 is provided on the water replenishment tank 23. The water replenishment tank 23 is connected to the twelfth pipeline 412 through the twenty-seventh pipeline 427, and the water replenishment pump 22 is provided on the twenty-seventh pipeline 427. The above-mentioned temperature sensor, pressure sensor, liquid level sensor, and electromagnetic flowmeter are all electrically connected to the controller. By understanding the monitoring feedback data of the above-mentioned temperature sensor, pressure sensor, liquid level sensor, and electromagnetic flowmeter, the water flow operation status of the corresponding pipeline can be realized.

[0038] According to the heating cycle, the entire heating cycle can generally be divided into the cold stage at the beginning and end of the heating season and the extremely cold stage in the middle of the heating season based on temperature conditions. The operating principle of the system in the cold stage at the beginning and end of the heating season is: in this stage, only the three main heat source equipment, namely the first water source heat pump 6, the first wide flow channel plate heat exchanger 4 and the first air fin tube heat exchanger 25, are operated.

[0039] Operating principle on the reclaimed water side (i.e., the low-quality heat source side): To prevent reclaimed water impurities from corroding and clogging the water-source heat pump equipment, wide-channel isolation plate heat exchangers are added before both the first water-source heat pump 6 and the second water-source heat pump 17. The circulating working fluid within both the first and second wide-channel plate heat exchangers 4 and 19, as well as the first and second water-source heat pumps 6 and 17, is ethylene glycol brine. Reclaimed water from reservoir 1 is supplied to the first wide-channel plate heat exchanger 4 by the first water pump 2 for primary heat exchange. After heat exchange, the ethylene glycol brine is then supplied to the first water-source heat pump 6 by the second water pump 5 for primary heat extraction. After heat exchange, the reclaimed water temperature drops to 6.5°C, meeting the heating needs of the three heating zones. After heat extraction, the reclaimed water flows out of the first wide-channel plate heat exchanger 4 for direct discharge. The first air fin-tube heat exchanger 25 serves as a backup heat source. When the water flow rate decreases and the heat source is insufficient, the first air fin-tube heat exchanger 25 is activated to ensure stable heating in the community.

[0040] Operating principle of the heating side: Since the heating terminals of the first and second residential areas are radiators, and the heating terminal of the third heating zone is floor heating, in order to better take into account the different heating water supply temperature requirements of radiators in old residential areas and floor heating in new energy-saving buildings, a large temperature difference step cooling method is adopted for heating. The return water at 42°C in the heating return water main pipe is supplied to the first water source heat pump 6 by the third water pump 7 for primary heating. After heating, the heating water can be heated to 49.5°C. Then, the third water pump 7 and the fourth water pump 10 supply water to the first heating zone 9 and the second heating zone 12 for heating respectively. After heating, the water temperature drops to 45.5°C. Then, the heating return water of the first and second heating zones is merged and then sent to the third heating zone 15 by the fifth water pump 13 for heating. After heating in the third heating zone, the return water temperature drops to 42°C and enters the heating return water main pipe, circulating in sequence.

[0041] The operating principle of the system during the extreme cold stage in the middle of the heating season is as follows: in this stage, seven main heat source devices, namely the first water source heat pump 6, the second water source heat pump 17, the third water source heat pump 16, the first wide flow channel plate heat exchanger 4, the second wide flow channel plate heat exchanger 19, the first air fin and tube heat exchanger 25, and the second air fin and tube heat exchanger 20, are operated.

[0042] The operating principle of the reclaimed water side (i.e., the low-quality heat source side): Wide-channel isolation plate heat exchangers are added before both the first water source heat pump 6 and the second water source heat pump 17. The circulating medium in both the first and second wide-channel plate heat exchangers 4 and 19, as well as the first and second water source heat pumps 6 and 17, is ethylene glycol brine. Reclaimed water from reservoir 1 is supplied by the first water pump 2 to the first wide-channel plate heat exchanger 4 for primary heat exchange. The resulting ethylene glycol brine is then supplied by the second water pump 5 to the first water source heat pump 6 for primary heat extraction, reducing the reclaimed water temperature to 6.5°C. Reclaimed water from the first wide-channel plate heat exchanger 4 then flows into the second wide-channel plate heat exchanger 19 for secondary heat exchange with the ethylene glycol brine. The sixth water pump 18 delivers the resulting ethylene glycol brine to the second water source heat pump 17 for secondary heat extraction, reducing the reclaimed water temperature to 1.5°C. At this point, the heat of the extracted greywater can meet the heating needs of the three heating zones during extremely cold weather in the middle of the heating season. The heated greywater flows directly out of the second wide-channel plate heat exchanger 19. The first and second air fin-and-tube heat exchangers serve as backup heat sources for the first and second water-source heat pumps, respectively. When the greywater heat source is insufficient due to reduced greywater flow or low temperature, the first and second air fin-and-tube heat exchangers are activated to ensure stable heating in the community.

[0043] Heating Principle: Because the first and second heating zones terminate in radiators, and the third zone in floor heating, a large temperature differential, stepped cooling system is employed to balance the different water supply temperature requirements of radiators in older residential areas and floor heating in new, energy-efficient buildings. Return water at 42°C from the heating return main pipe is fed by the third water pump 7 to the first water-source heat pump 6 for primary heating, raising the temperature to 48°C. The water then enters the second water-source heat pump 17 for secondary heating, raising the temperature to 56°C, meeting heating needs in extremely cold weather. The 56°C heating water is supplied by the third and fourth water pumps 7 and 10 to the first and second heating zones, respectively, for heating. After heating, the water temperature drops to 48°C. The return water from the first and second heating zones is then combined and delivered by the fifth water pump 13 to the third heating zone 15 for heating. After heating in the third heating zone 15, the return water temperature drops to 42°C before entering the main heating return pipe and circulating sequentially. The third water-source heat pump 16 serves as an emergency heat source for the third heating zone. When the heating water temperature in the third heating zone 15 falls below 48°C, the third water-source heat pump 16 automatically activates, extracting heat from the return water to raise the feed water temperature in the third heating zone 15.

[0044] The present invention further provides an operation control method for a heating system, including the heating system described in the above embodiment, wherein the operation control method comprises the following steps:

[0045] Before the system is put into operation, the staff needs to check that all electric valves, temperature sensors, pressure sensors, heat pumps and water pumps meet the requirements for use. At the same time, the fifth manual valve 305 and the sixth manual valve 306 are opened to keep them in the normally open state.

[0046] S1 staff starts the controller;

[0047] S2 staff makes the controller enter the extreme cold weather operation mode or weather operation mode in the middle of the heating season according to the heating cycle;

[0048] S2.1 When the controller enters the cold weather operation mode at the beginning and end of the heating season, the controller opens the fifteenth electric valve 315, the second electric valve 302, the seventh electric valve 307 and the eighth electric valve 308, and closes the thirteenth electric valve 313, the fourteenth electric valve 314, the third electric valve 303 and the fourth electric valve 304. Then, the first water pump 2, the third water pump 7, the fourth water pump 10 and the fifth water pump 13 start to operate. At this time, the continuous delivery of the sewage discharge heat source and the initial cold circulation of the heating water in the third pipeline are realized. After the first water pump 2, the third water pump 7, the fourth water pump 10 and the fifth water pump 13 are running, the staff sets the upper liquid level threshold H1 and the lower liquid level threshold H2 of the water reservoir 1, where H1>H2, and sets H1 The function of is to ensure that effective water supply can be carried out when the water level of the water reservoir 1 is above H1. The function of setting H2 is to set a minimum limit. When the H1 monitoring signal fails and the H2 monitoring signal takes effect, the continued supply of water in the water reservoir 1 is stopped to ensure that the first water pump 2 does not run at no load. The water temperature threshold value T1 of the second pipe 402 is set, and the water temperature threshold value T2 of the ninth pipe 409 is set. After setting the above parameters, the controller compares the liquid level value H3 monitored by the first liquid level sensor 301 with H1 in real time, compares the temperature value T3 monitored by the second temperature sensor 102 with T1 in real time, and compares the temperature value T4 monitored by the sixth temperature sensor 106 with T2 in real time; when comparing H3 with H 1 and T3 is compared with T1. When H3 < H1 or T3 < T1, it means that the water level of the water reservoir 1 is no longer suitable for continuous water supply or the outlet water temperature of the first wide flow channel isolation plate heat exchanger 4 is too low, and it is not convenient to use the sewage in the water reservoir 1 for continuous heating. The controller turns off the first water pump 2, so that the nineteenth electric valve 319 and the twentieth electric valve 320 are in a closed state. At the same time, the twenty-first electric valve 321 and the twenty-second electric valve 322 are opened, and then the first air fin-tube heat exchanger 25 is used as a heat source. When H3 ≥ H1 and T3 ≥ T1, the controller opens the nineteenth electric valve 319 and the twentieth electric valve 320, and at the same time, the twenty-first electric valve 321 and the twenty-second electric valve 322 are closed. state, thereby making the water reservoir 1 as the heat source, when comparing T4 with T2, when T4 ≥ T2, the controller makes the second water pump 2 and the first water source heat pump 6 in the closed state, at this time, it means that the heating water temperature meets the heating requirement and no heating is required, when T4 < T2, the controller starts the second water pump 2 and the first water source heat pump 6, at this time, it means that the water supply temperature of the heating water in the third pipeline does not meet the water supply temperature requirement, so it is necessary to use the first water source heat pump 6 to heat the heating water. When the first water source heat pump 6 heats the heating water, according to the selection of the controller, the water reservoir 1 or the first air fin-tube heat exchanger 25 can be used as the heat source of the first water source heat pump 6, thereby effectively realizing the heat source stability of the first water source heat pump 6;In the cold weather operation mode at the beginning and end of the heating season, since the ambient temperature is not very low, the heating demand can be met by the first water source heat pump 6 during normal heating, without the need for auxiliary heating by the second water source heat pump 17 and the third water source heat pump 16.

[0049] S2.2 When the controller enters the extreme cold weather operation mode in the middle of the heating season, the controller closes the fifteenth electric valve 315 and the second electric valve 302, and opens the thirteenth electric valve 313, the fourteenth electric valve 314, the third electric valve 303, the fourth electric valve 304, the seventh electric valve 307 and the eighth electric valve 308. Then, the first water pump 2, the third water pump 7, the fourth water pump 0 and the fifth water pump 13 start to run. At this time, the sewage discharge water in the water reservoir 1 is realized to flow in the first wide flow channel isolation plate heat exchanger 4 and the second wide flow channel isolation plate heat exchanger 19 in sequence. At the same time, the cold circulation of heating water is realized between the heating area and the first water source heat pump 6 and the second water source heat pump 17. The staff sets the water reservoir 1 on The liquid level threshold H5 and the lower liquid level threshold H6, wherein H5>H6, the purpose of setting H5 is to ensure that effective water supply can be carried out when the water level of the water reservoir 1 is above H5, and the purpose of setting H6 is to set a minimum limit. When the H5 monitoring signal fails and the H6 monitoring signal takes effect, the continued supply of water in the water reservoir 1 is stopped to ensure that the first water pump 2 does not run at no load; the fourth pipe 404 water temperature threshold T5 is set, the ninth pipe 409 water temperature threshold T6 is set, and the eleventh pipe 411 water temperature threshold T7 is set. After setting the above parameters, the controller compares the liquid level value H7 monitored by the first liquid level sensor 301 with H5 in real time, and compares the liquid level value H7 monitored by the nineteenth temperature sensor 119 in real time. The temperature value T8 measured by the sixth temperature sensor 106 is compared with T5, the temperature value T9 monitored by the sixth temperature sensor 106 is compared with T6 in real time, and the temperature value T10 monitored by the twelfth temperature sensor 112 is compared with T7 in real time. When comparing H7 with H5 and T8 with T5, if H7 < H5, it means that the water level in the water reservoir 1 is low and it is not convenient to use the water therein as a low-quality heat source for heating. The controller stops the first water pump 2, opens the twenty-first electric valve 321, the twenty-second electric valve 322, the tenth electric valve 310 and the twelfth electric valve 312, and then opens the nineteenth electric valve 319, the twentieth electric valve 320, the ninth electric valve 309 and the eleventh electric valve 311. The controller is in the closed state and starts the second water pump 5 and the first heat source water pump 6. At this time, the first air fin-tube heat exchanger 25 and the second air fin-tube heat exchanger 20 serve as heat sources. When H7 ≥ H5, the water level in the water reservoir 1 meets the water supply requirements. The controller opens the nineteenth electric valve 319, the twentieth electric valve 320, the second water pump 5 and the first heat source water pump 6, and closes the twenty-first electric valve 321 and the twenty-second electric valve 322. On the basis of H7 ≥ H5, when T8 < T5, the controller closes the ninth electric valve 309 and the eleventh electric valve 311, and opens the tenth electric valve 310 and the twelfth electric valve 312. At this time, the water reservoir 1 and the second air fin-tube heat exchanger 20 serve as heat sources.On the basis of H7≥H5, when T8≥T5, the controller opens the ninth electric valve 309 and the eleventh electric valve 311, and closes the tenth electric valve 310 and the twelfth electric valve 312; at this time, the water reservoir 1 is used as a heat source; when comparing T9 with T6, when T9≥T6, the sixth water pump 18 and the second water source heat pump 17 are in the closed state, at this time, it is explained that the heating demand can be met by the single heating of the first heat source water pump 6, and when T9<T6, the sixth water pump 18 and the second water source heat pump 17 are in the started state, at this time, it is explained that the heating capacity of the first water source heat pump 6 The heating demand can no longer be met, and the second water-source heat pump 17 needs to be added to meet the heating demand. When comparing T10 and T7, if T10 ≥ T7, the third water-source heat pump 16 is in the off state. At this time, the water supply temperature of the third heating zone meets its heating temperature requirement, and the third water-source heat pump 16 is not needed to provide heating. When T10 < T7, the seventh electric valve 307 and the eighth electric valve 308 are closed, and then the third water-source heat pump 16 is turned on. At this time, the water supply temperature of the third heating zone does not meet its heating temperature requirement, and the third water-source heat pump 16 is needed to provide heating.

[0050] Except for the technical features described in the specification, all other technical features are known technologies to those skilled in the art.

[0051] The above description, in conjunction with the accompanying drawings, details the preferred embodiments and examples of the present invention. However, the present invention is not limited to the above embodiments and examples. A person skilled in the art can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for controlling the operation of a heating system, characterized in that: The invention relates to a heating system, comprising a water reservoir, a first water source heat pump, a first heating zone, a second heating zone, a third heating zone, a second water source heat pump, and a controller. The heating system further comprises a first wide-channel isolating plate heat exchanger, a first air fin-tube heat exchanger, a second wide-channel isolating plate heat exchanger, and a second air fin-tube heat exchanger. A first pipeline is provided between the water reservoir, the first wide-channel isolating plate heat exchanger, and the second wide-channel isolating plate heat exchanger. The first pipeline is used to realize the first wide-channel isolating plate heat exchanger. The wide-channel isolation plate heat exchanger is used for water supply alone or the first wide-channel isolation plate heat exchanger and the second wide-channel isolation plate heat exchanger are used for water supply in sequence. A second pipeline for heat exchange medium circulation is provided between the first wide-channel isolation plate heat exchanger, the first air fin-tube heat exchanger and the first water source heat pump. A third pipeline is provided between the first water source heat pump, the second water source heat pump, the first heating zone, the second heating zone and the third heating zone. The third pipeline is used to realize the circulating heating and heat release of the heating water. A fourth pipeline for realizing heat exchange medium circulation is provided between the heat exchanger, the second air fin-tube heat exchanger, and the second water source heat pump. The controller is used to control the operation of the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the first water source heat pump, and the second water source heat pump. The first pipeline includes a first water pump, a first pipeline, a second pipeline, a third pipeline, and a fourth pipeline. The first pipeline realizes communication between the water reservoir and the water inlet port on the heat absorption side of the first wide flow channel isolation plate heat exchanger. The first water pump is connected in series to the first pipeline. The second pipeline realizes communication between the water outlet port on the heat absorption side of the first wide flow channel isolation plate heat exchanger and the outside. The third pipeline and the fourth pipeline realize communication between the heat absorption side of the second wide flow channel isolation plate heat exchanger and the second pipeline. A thirteenth electric valve and a fourteenth electric valve are connected in series to the third pipeline and the fourth pipeline, respectively. A fifteenth electric valve is provided on the second pipeline. The fifteenth electric valve is located downstream of the connection between the second pipeline and the third pipeline and upstream of the connection between the second pipeline and the fourth pipeline.The second pipeline includes a fifth pipeline, a sixth pipeline, a seventh pipeline, an eighth pipeline, and a second water pump. The fifth pipeline and the sixth pipeline realize communication between the heat release side of the first wide-channel isolation plate heat exchanger and the heat absorption side of the first water source heat pump. The second water pump is arranged on the fifth pipeline. The seventh pipeline realizes communication between the fifth pipeline and the water outlet end of the first air fin-tube heat exchanger, and the connection between the seventh pipeline and the fifth pipeline is located upstream of the second water pump. The eighth pipeline realizes communication between the sixth pipeline and the water inlet end of the first air fin-tube heat exchanger. A nineteenth electric valve located upstream of the connection between the fifth pipeline and the seventh pipeline is connected in series to the fifth pipeline. A twentieth electric valve located downstream of the connection between the sixth pipeline and the eighth pipeline is connected in series to the sixth pipeline. A twenty-first electric valve and a twenty-second electric valve are connected in series to the seventh pipeline and the eighth pipeline, respectively.The third pipeline includes a ninth pipeline, a tenth pipeline, an eleventh pipeline, a twelfth pipeline, a third water pump, a fourth water pump, a fifth water pump, and a third water source heat pump. The ninth pipeline realizes the connection between the water outlet end of the heat release side of the first water source heat pump and the water inlet end of the second heating zone. The fourth water pump is connected in series to the ninth pipeline. The tenth pipeline realizes the connection between the ninth pipeline and the water inlet end of the first heating zone, and the connection between the ninth pipeline and the tenth pipeline is located upstream of the fourth water pump. The eleventh pipeline realizes the connection between the ninth pipeline and the water inlet end of the third heating zone, and the The connection between the eleventh pipeline and the ninth pipeline is located downstream of the fourth water pump, the fifth water pump is connected in series to the eleventh pipeline, the twelfth pipeline realizes the connection between the water outlet of the third heating zone and the water inlet of the heat release side of the first water source heat pump, the third water pump is connected in series to the twelfth pipeline, and the heat release side of the second water source heat pump is realized through the fifth pipeline with the pipe section of the ninth pipeline located upstream of the connection between the ninth pipeline and the tenth pipeline. The fifth pipeline includes a thirteenth pipeline and a fourteenth pipeline, which are respectively connected in series to the thirteenth pipeline and the fourteenth pipeline. A third electric valve and a fourth electric valve, a second electric valve is connected in series on the ninth pipeline, the second electric valve is located downstream of the connection between the ninth pipeline and the thirteenth pipeline, and upstream of the connection between the ninth pipeline and the fourteenth pipeline, the water outlet of the first heating zone is connected to the eleventh pipeline through a fifteenth pipeline, the water outlet of the second heating zone is connected to the eleventh pipeline through a sixteenth pipeline, the water inlet and outlet of the heat release side of the third water source heat pump are connected to the eleventh pipeline through the seventeenth pipeline and the eighteenth pipeline respectively, A seventh electric valve is connected in series to the section of the eleventh pipeline between the seventeenth and eighteenth pipelines. The heat absorption side of the third water-source heat pump is connected to the twelfth pipeline via the nineteenth and twentieth pipelines. An eighth electric valve is connected in series to the section of the twelfth pipeline between the nineteenth and twenty-first pipelines. A sixth manual valve is connected in series to the eleventh pipeline and is located upstream of the connection between the seventeenth and eleventh pipelines. A fifth manual valve is connected in series to the eleventh pipeline and is located upstream of the connection between the sixteenth and eleventh pipelines.The fourth pipeline includes a twenty-first pipeline, a twenty-second pipeline, a twenty-third pipeline, a twenty-fourth pipeline, and a sixth water pump. The twenty-first pipeline and the twenty-second pipeline realize the penetration of the heat release side of the second wide flow channel isolation plate heat exchanger and the heat absorption side of the second water source heat pump. The sixth water pump is arranged on the twenty-first pipeline. The twenty-third pipeline realizes the penetration of the twenty-first pipeline and the water outlet end of the second air fin-tube heat exchanger, and the connection between the twenty-first pipeline and the twenty-third pipeline is located upstream of the sixth water pump. The twenty-fourth pipeline realizes the penetration of the twenty-second pipeline and the second air fin-tube heat exchanger. The water inlet end of the fin-tube heat exchanger is connected in series, a ninth electric valve is connected in series to the twenty-first pipeline upstream of the connection between the twenty-first pipeline and the twenty-third pipeline, an eleventh electric valve is connected in series to the twenty-second pipeline downstream of the connection between the twenty-second pipeline and the twenty-fourth pipeline, and a tenth electric valve and a twelfth electric valve are connected in series to the twenty-third pipeline and the twenty-fourth pipeline, respectively. The heating system also includes an ethylene glycol brine expansion tank, which is used to provide ethylene glycol brine to the second pipeline and the fourth pipeline. The operation control method includes the following steps: S1 staff starts the controller; S2 staff makes the controller enter the extreme cold weather operation mode in the middle of the heating season or the cold weather operation mode in the early and late heating season according to the heating cycle; S2.1 When the controller enters the cold weather operation mode at the beginning and end of the heating season, the controller opens the fifteenth electric valve, the second electric valve, the seventh electric valve and the eighth electric valve, and closes the thirteenth electric valve, the fourteenth electric valve, the third electric valve and the fourth electric valve, and then starts the first water pump, the third water pump, the fourth water pump and the fifth water pump. After the first water pump, the third water pump, the fourth water pump and the fifth water pump are running, the staff sets the upper liquid level threshold H1 and the lower liquid level threshold H2 of the water reservoir, where H1>H2, sets the second pipe water temperature threshold T1, and sets the ninth pipe water temperature threshold T2. After setting the above parameters, the controller compares the liquid level value H3 monitored by the first liquid level sensor with H1 in real time, compares the temperature value T3 monitored by the second temperature sensor with T1 in real time, and compares the sixth liquid level value with H2 in real time. The monitored temperature value T4 of the temperature sensor is compared with T2; when comparing H3 with H1 and T3 with T1, when H3 < H1 or T3 < T1, the controller turns off the first water pump, so that the nineteenth electric valve and the twentieth electric valve are in the closed state, and at the same time, opens the twenty-first electric valve and the twenty-second electric valve, thereby making the first air fin-tube heat exchanger serve as the heat source; when H3 ≥ H1 and T3 ≥ T1, the controller opens the nineteenth electric valve and the twenty-first electric valve, and at the same time, makes the twenty-first electric valve and the twenty-second electric valve in the closed state, thereby making the water reservoir serve as the heat source; when comparing T4 with T2, when T4 ≥ T2, the controller turns off the second water pump and the first water source heat pump; when T4 < T2, the controller starts the second water pump and the first water source heat pump; S2.2 When the controller enters the extreme cold weather operation mode in the middle of the heating season, the controller closes the 15th electric valve and the 2nd electric valve, and opens the 13th electric valve, the 14th electric valve, the 3rd electric valve, the 4th electric valve, the 7th electric valve and the 8th electric valve. Then, the first water pump, the third water pump, the fourth water pump and the fifth water pump start to operate. The staff sets the upper liquid level threshold H5 and the lower liquid level threshold H6 of the water reservoir, where H5>H6, sets the fourth pipe water temperature threshold T5, sets the ninth pipe water temperature threshold T6, and sets the eleventh pipe water temperature threshold T7. After setting the above parameters, the controller The liquid level values H7 and H5 monitored by the first liquid level sensor are compared in real time, the temperature values T8 and T5 monitored by the nineteenth temperature sensor are compared in real time, the temperature values T9 and T6 monitored by the sixth temperature sensor are compared in real time, and the temperature values T10 and T7 monitored by the twelfth temperature sensor are compared in real time. When comparing H7 and H5 and T8 and T5, if H7 < H5, the controller stops the first water pump, opens the twenty-first electric valve, the twenty-second electric valve, the tenth electric valve and the twelfth electric valve, and then closes the nineteenth electric valve, the twentieth electric valve, The ninth electric valve and the eleventh electric valve are in the closed state, and the second water pump and the first heat source water pump are started. At this time, the first air fin-tube heat exchanger and the second air fin-tube heat exchanger are used as heat sources. When H7≥H5, the controller opens the nineteenth electric valve, the twentieth electric valve, the second water pump and the first heat source water pump, and closes the twenty-first and twenty-second electric valves. On the basis of H7≥H5, when T8<T5, the controller closes the ninth electric valve and the eleventh electric valve, and opens the tenth electric valve and the twelfth electric valve. At this time, the water reservoir and the second air fin-tube heat exchanger are used as heat sources. At H On the basis of 7≥H5, when T8≥T5, the controller opens the ninth electric valve and the eleventh electric valve, and closes the tenth electric valve and the twelfth electric valve; at this time, the water reservoir serves as the heat source; when comparing T9 and T6, when T9≥T6, the sixth water pump and the second water source heat pump are in the off state, and when T9<T6, the sixth water pump and the second water source heat pump are in the started state; when comparing T10 and T7, when T10≥T7, the third water source heat pump is in the off state, and when T10<T7, the seventh electric valve and the eighth electric valve are closed, and then the third water source heat pump is turned on.

2. The operation control method of a heating system according to claim 1, characterized in that: A first liquid level sensor is arranged in the water reservoir, a second temperature sensor is arranged on the second pipe, a sixth temperature sensor is arranged on the ninth pipe, a nineteenth temperature sensor is arranged on the fourth pipe, and a twelfth temperature sensor is arranged on the eleventh pipe and is located downstream of the fifth water pump.

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