A large-temperature-difference heat supply system with a heat pump coupled with a heat exchanger

Abstract

The application discloses a large-temperature-difference heating system coupled with a heat pump and a heat exchanger, which comprises a primary-side water supply pipe network, a primary-side return water pipe network, a high-zone plate heat exchanger unit, a secondary-side water supply pipe network, a secondary-side return water pipe network, a first circulating pump, a low-zone plate heat exchanger unit and a heat pump unit. The high-zone plate heat exchanger unit is connected with the primary-side water supply pipe network and the primary-side return water pipe network, and is also connected with the secondary-side water supply pipe network and the secondary-side return water pipe network. The secondary-side water supply pipe network and the secondary-side return water pipe network are used for realizing secondary-side heating in the high zone. The primary-side return water pipe network is connected with two branch pipe networks of the low-zone plate heat exchanger unit, one branch pipe network of the low-zone plate heat exchanger unit is connected with the heat pump unit, and the other branch pipe network is connected with one side of the heat pump unit through the second circulating pump. The other side of the heat pump unit is connected with two branch pipe networks for realizing secondary-side heating in the low zone. According to the embodiment of the application, the electric heat pump and the conventional heat exchanger are combined into a large-temperature-difference heat exchanger unit, the temperature difference of the water supply and return of one heating pipe network is enlarged, and the heating area is increased.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology or the field of heating system technology, specifically to a large temperature difference heating system coupled with a heat pump and a heat exchanger. Background Technology

[0002] In traditional heating systems, the design and operating temperature difference between the primary network (heat source to heat exchange station) and the secondary network (heat exchange station to user) is usually small (for example, the supply and return water temperature difference of the primary network is 95 / 60℃, a temperature difference of 35℃; the secondary network is 70 / 50℃, a temperature difference of 20℃).

[0003] Traditional heating systems have large flow rates and high energy consumption, according to the formula Q=C m ΔT` (Heat (`Q) = Specific heat capacity (C) Mass flow rate (m³) Temperature difference (ΔT'), when delivering the same amount of heat `Q, the smaller the temperature difference ΔT, the greater the required mass flow rate m. This means: larger pipe diameter requirements: requiring thicker pipes, resulting in higher investment costs; higher pump power consumption: driving a large flow rate of water circulation requires a more powerful pump, significantly increasing operating energy consumption (pump power is proportional to the cube of flow rate); limited heating network transmission capacity: the maximum transmission capacity of existing pipe networks with fixed pipe diameters is limited by flow rate. A small temperature difference means it is difficult to deliver more heat on existing pipe networks, limiting the expansion of heating areas or the access of new heat users; limited heat source efficiency: cogeneration power plants or large boilers operate more efficiently at lower return water temperatures. The high return water temperature (e.g., 50℃) of traditional systems limits the improvement of heat source efficiency.

[0004] Currently, heating networks are complex. Most heating companies' traditional heating systems have small temperature differences between the primary and return water, large flow rates, and high energy consumption for heating transmission. Existing large temperature difference heating systems use absorption heat pump units, which are relatively complex and have high initial investment. Summary of the Invention

[0005] This invention provides a large temperature difference heating system that couples a heat pump and a heat exchanger. It can combine an electric heat pump with a conventional heat exchanger to form a large temperature difference heat exchange unit, thereby increasing the temperature difference between the supply and return water of the heating network and increasing the heating area.

[0006] This invention provides a large temperature difference heating system coupled with a heat pump and a heat exchanger. The system includes: a high-zone plate heat exchanger unit, a primary-side supply water network, a primary-side return water network, a first circulating pump, a secondary-side supply water network, a secondary-side return water network, a second circulating pump, a low-zone plate heat exchanger unit, and a heat pump unit.

[0007] The primary side water supply network and the primary side return network are connected to the high-zone plate heat exchanger unit; the high-zone plate heat exchanger unit is also connected to the secondary side water supply network and the secondary side return network; the secondary side water supply network and the secondary side return network are used to realize high-zone secondary side heating; the secondary side return network is connected to the first circulating pump.

[0008] The primary return water pipe is connected to one side of the low-zone plate heat exchanger unit via two branch pipe networks. One branch pipe network on the other side of the low-zone plate heat exchanger unit is connected to the heat pump unit, and the other branch pipe network is connected to one side of the heat pump unit via the second circulating pump. The other side of the heat pump unit is used to realize low-zone secondary side heating through two branch pipe networks.

[0009] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a first dirt separator;

[0010] The first circulating pump is first connected to the first dirt separator, and then the secondary side heating of the high zone is realized.

[0011] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a second dirt separator and a manifold.

[0012] The first circulating pump is connected to the water distribution manifold and the second dirt separator in sequence, and then the high-zone secondary side heating is realized.

[0013] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a secondary heat meter;

[0014] The first circulating pump is connected to the water distributor via the secondary heat meter.

[0015] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a primary side heat meter;

[0016] The primary side return water network is connected to the high-zone plate heat exchanger unit through the primary side heat meter.

[0017] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a low-zone electric regulating valve;

[0018] The primary heat meter is connected to the low-zone plate heat exchanger unit via the low-zone electric regulating valve.

[0019] In some possible application scenarios, the low-zone electric regulating valve is adjusted in the following manner:

[0020] Obtain the number of users receiving secondary heating in the lower zone during a preset time period;

[0021] A fitting curve is obtained by fitting the data based on the number of users.

[0022] Determine the corresponding adjustment curve based on the fitted curve;

[0023] The valve opening of the low-zone electric regulating valve is adjusted according to the adjustment curve.

[0024] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a high-zone makeup water pump and a low-zone makeup water pump.

[0025] The secondary side return water network is connected to the first water source through the high-zone water supply pump;

[0026] One branch network of the heat pump unit is connected to the first water source through the low-zone makeup water pump.

[0027] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a high-zone makeup water pump and a low-zone makeup water pump.

[0028] The secondary side return water network is connected to the first water source through the high-zone water supply pump;

[0029] One branch network of the heat pump unit is connected to the second water source via the low-zone makeup water pump.

[0030] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a high-zone electric regulating valve;

[0031] The primary water supply network is connected to the high-zone plate heat exchanger unit via the high-zone electric regulating valve.

[0032] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a third dirt separator;

[0033] The heat pump unit is first connected to the third dirt remover, and then the secondary side heating in the low zone is realized.

[0034] In some possible application scenarios, the first circulating pump performs the following operations:

[0035] Obtain the first water flow rate, first water flow pressure, and heating demand parameters of the secondary return water network; the heating demand parameters include the number of first users requiring secondary heating in the high-rise area;

[0036] Determine the first reference working parameter corresponding to the first number of users;

[0037] Determine the first adjustment parameter corresponding to the first water flow rate;

[0038] Determine the first fine-tuning parameter corresponding to the first water flow pressure;

[0039] The first operating parameters of the first circulating pump are determined based on the first adjustment parameter, the first fine-tuning parameter, and the first reference operating parameter.

[0040] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger may also include: a third circulation pump;

[0041] The heat pump unit is first connected to the third circulation pump, and then the secondary side heating in the low zone is realized.

[0042] Implementing the embodiments of the present invention has the following beneficial effects:

[0043] As can be seen, the large temperature difference heating system coupled with a heat pump and heat exchanger described in this embodiment of the invention includes: a high-zone plate heat exchanger unit, a primary side supply water network, a primary side return water network, a first circulating pump, a secondary side supply water network, a secondary side return water network, a second circulating pump, a low-zone plate heat exchanger unit, and a heat pump unit. The primary side supply water network and the primary side return water network are connected to the high-zone plate heat exchanger unit; the high-zone plate heat exchanger unit is also connected to the secondary side supply water network and the secondary side return water network; the secondary side supply water network and the secondary side return water network are used to realize secondary side heating in the high-zone; the secondary side return water network is connected to the first circulating pump; the primary side return water pipe is connected to one side of the low-zone plate heat exchanger unit via two branch networks; one branch network on the other side of the low-zone plate heat exchanger unit is connected to the heat pump unit, and the other branch network is connected to one side of the heat pump unit via the second circulating pump; the other side of the heat pump unit is connected to the heat pump unit via two branch networks. The network is used to provide secondary heating in the low-zone area. Therefore, for the primary side process, the primary side supply water (90-100℃) generated by the heating company enters the newly added heat exchange station users. One path leads to the high-zone plate heat exchanger unit, and the other path leads to the low-zone plate heat exchanger unit. The high-zone and low-zone primary sides are a series system. The return water (60℃) from the high-zone primary side enters one side of the low-zone plate heat exchanger unit. After heat exchange, the water temperature drops to around 30℃ and returns to the heating company for circulation. For the secondary side process, the high-zone secondary side process is as follows: the secondary side supply water (45℃) is sent to the user terminal for heat exchange. After the heat exchange is completed, the secondary side return water temperature (35℃) enters the high-zone plate heat exchanger unit for heat exchange circulation after passing through the circulation pump. The low-zone secondary side process is as follows: the heat pump return water enters the low-zone plate heat exchanger unit, and after heat exchange, it enters the heat pump unit. After being raised by the heat pump unit to 45℃, it drops to 35℃ after heat exchange and enters the heat pump unit for circulation.

[0044] Based on the above-mentioned large temperature difference heating system that couples heat pumps and heat exchangers, electric heat pumps and conventional heat exchangers can be combined into large temperature difference heat exchange units to increase the temperature difference between the supply and return water of the heating network and increase the heating area. In addition, according to the needs of different users of various heating companies, the initial investment can be reduced while reducing construction costs and increasing the heating area of ​​users. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of a large temperature difference heating system coupled with a heat pump and a heat exchanger, provided in an embodiment of the present invention.

[0047] Figure 2 This is a schematic diagram of another large temperature difference heating system coupled with a heat pump and heat exchanger provided in an embodiment of the present invention. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0050] It should be understood that the term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document indicates that the preceding and following related objects are in an "or" relationship. In the embodiments of this invention, "multiple" refers to two or more.

[0051] In this invention, "at least one item" or similar expressions refer to any combination of these items, including any combination of a single item or multiple items. "One or more" means one or more, while "multiple" means two or more. For example, "at least one item" of a, b, or c can represent the following seven cases: a, b, c, a and b, a and c, b and c, a, b, and c. Each of a, b, and c can be an element or a set containing one or more elements.

[0052] In the embodiments of this invention, "connection" refers to various connection methods such as direct connection or indirect connection to achieve communication between devices. The embodiments of this invention do not impose any limitations on this.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] In related technologies, the core requirements and objectives of heating system design are as follows: 1. Potential tapping and efficiency improvement: How to significantly improve the transmission capacity of the existing heating network without large-scale renovation of the main pipeline network; 2. Energy saving and consumption reduction: How to significantly reduce the power consumption of the circulating water pumps in the pipeline network; 3. Improve heat source efficiency: How to reduce the return water temperature of the primary network so that the heat source can operate in a more efficient state.

[0055] The core idea of ​​large temperature difference technology is to significantly increase the temperature difference between the supply and return water. Specifically, the core idea is to proportionally reduce the required flow rate (m) by significantly increasing the supply and return water temperature difference ΔT in the primary network while delivering the same amount of heat. Target temperature difference: The design / operational temperature difference of the primary network is increased from the traditional 20-30℃ to 50-60℃ or even greater (e.g., supply water 130℃, return water 30-40℃, temperature difference 80-100℃). Effects: Doubled delivery capacity: A flow rate reduction of over 50% means that the delivery capacity of the existing pipe network can be doubled or even more. Drastic reduction in pump consumption: The significant reduction in flow rate leads to a sharp decrease in pump power consumption (theoretically, a cubic relationship with the flow rate). Significantly reduced return water temperature: The primary network return water temperature can be reduced to 30-40℃, far lower than the traditional 40-50℃ or even higher.

[0056] Key challenges and solutions for achieving large temperature difference technology:

[0057] Challenge: How to achieve a large temperature difference in the primary network while simultaneously meeting the requirements of the secondary network users (radiators, underfloor heating, etc.) for water supply temperature (typically 70-50℃) and temperature difference (typically 20℃)? Traditional plate heat exchangers cannot directly couple the large temperature difference in the primary network with the small temperature difference in the secondary network. Solution - Large Temperature Difference Heat Exchanger Units: This is the background for the emergence of large temperature difference heat exchanger units. There are two main technical routes: a. Based on absorption heat exchange (lithium bromide) technology and b. Based on compression heat pump technology.

[0058] The following is an introduction to absorption heat exchange (lithium bromide) technology:

[0059] Principle: Utilizing high-temperature hot water (e.g., 130℃) from the primary heat exchange network as the driving heat source to power a lithium bromide absorption heat pump. Process: The high-temperature water from the primary network first enters the generator to drive the heat pump circulation. Then, the cooled water (e.g., to 70-80℃) enters the plate heat exchanger to heat the secondary heat exchange network. Simultaneously, the heat pump's evaporator absorbs heat from a low-temperature heat source (usually part of the secondary network return water or an ambient heat source). Its condenser is connected in parallel or series with the plate heat exchanger to jointly heat the secondary network supply water. Effect: The primary network return water temperature can be reduced to below 30℃. While heating the secondary network, deep cooling of the primary network is achieved, creating a large temperature difference. Advantages: High energy efficiency ratio, strong deep heat extraction capability. Disadvantages: Relatively complex system, high initial investment, and certain requirements on the driving heat source temperature.

[0060] The following is an introduction to compression heat pump technology:

[0061] Principle: Utilizing an electrically driven compressor, heat is extracted from a low-temperature heat source (primary network return water or ambient temperature) and used to heat the secondary network. Process: Hot water from the primary network (e.g., 90-70℃) first passes through a plate heat exchanger to preheat the secondary network, lowering its temperature (e.g., to 40-50℃). This cooled primary water then serves as the low-temperature heat source for the heat pump, where it further extracts heat, lowering the temperature even further (e.g., below 30℃). The medium-temperature heat output from the heat pump (e.g., 55-65℃) then supplements the heating of the secondary network supply water. Effect: Achieves the same effect, lowering the primary network return water temperature to around 30℃. Advantages: High coefficient of performance, flexible design, and can utilize ambient heat sources (air source). Disadvantages: High electricity consumption; economic viability needs evaluation in areas with high electricity prices.

[0062] Based on related technologies, this invention provides a large temperature difference heating system coupled with a heat pump and a heat exchanger. This system includes: a high-zone plate heat exchanger unit, a primary-side supply water network, a primary-side return water network, a first circulating pump, a secondary-side supply water network, a secondary-side return water network, a second circulating pump, a low-zone plate heat exchanger unit, and a heat pump unit. The primary-side supply water network and the primary-side return water network are connected to the high-zone plate heat exchanger unit. The high-zone plate heat exchanger unit is also connected to... The system includes a secondary water supply network and a secondary water return network. These networks are used to provide secondary heating in the high-zone area. The secondary water return network is connected to the first circulating pump. The primary water return pipe is connected to one side of the low-zone plate heat exchanger unit via two branch networks. On the other side of the low-zone plate heat exchanger unit, one branch network connects to the heat pump unit, and another branch network connects to one side of the heat pump unit via the second circulating pump. The other side of the heat pump unit is used to provide secondary heating in the low-zone area via two branch networks.

[0063] In practice, for the primary side process, the primary side supply water (90-100℃) generated by the heating company enters the newly added heat exchange station users. One path goes into the high-zone plate heat exchanger unit of the heat exchange station, and the other path goes into the low-zone plate heat exchanger unit. The high-zone and low-zone primary sides are a series system. The return water (60℃) from the high-zone primary side enters one side of the low-zone plate heat exchanger unit. After heat exchange, the water temperature drops to about 30℃ and returns to the heating company for circulation. For the secondary side process, in the high-zone secondary side process: the secondary side supply water (45℃) is sent to the user terminal for heat exchange. After heat exchange, the secondary side return water temperature (35℃) enters the high-zone plate heat exchanger unit for heat exchange circulation after passing through the circulation pump. In the low-zone secondary side process: the heat pump return water enters the low-zone plate heat exchanger unit. After heat exchange, it enters the heat pump unit. After being raised to 45℃ by the heat pump unit, it drops to 35℃ after heat exchange and enters the heat pump unit for circulation. Based on the above-mentioned large temperature difference heating system that couples heat pumps and heat exchangers, electric heat pumps and conventional heat exchangers can be combined into large temperature difference heat exchange units to increase the temperature difference between the supply and return water of the heating network and increase the heating area. In addition, according to the needs of different users of various heating companies, the initial investment can be reduced while reducing construction costs and increasing the heating area of ​​users.

[0064] The embodiments of the present invention will be described in detail below.

[0065] Please see Figure 1 , Figure 1 This is a schematic diagram of a large temperature difference heating system coupled with a heat pump and a heat exchanger provided in an embodiment of the present invention. The large temperature difference heating system coupled with a heat pump and a heat exchanger includes: a high-zone plate heat exchanger unit, a primary side water supply network, a primary side return water network, a first circulation pump, a secondary side water supply network, a secondary side return water network, a second circulation pump, a low-zone plate heat exchanger unit, and a heat pump unit, wherein;

[0066] The primary side water supply network and the primary side return network are connected to the high-zone plate heat exchanger unit; the high-zone plate heat exchanger unit is also connected to the secondary side water supply network and the secondary side return network; the secondary side water supply network and the secondary side return network are used to realize high-zone secondary side heating; the secondary side return network is connected to the first circulating pump.

[0067] The primary return water pipe is connected to one side of the low-zone plate heat exchanger unit via two branch pipe networks. One branch pipe network on the other side of the low-zone plate heat exchanger unit is connected to the heat pump unit, and the other branch pipe network is connected to one side of the heat pump unit via the second circulating pump. The other side of the heat pump unit is used to realize low-zone secondary side heating through two branch pipe networks.

[0068] The primary water supply network and the primary water return network can be connected to the heat source, namely the heating company or the heat supply company.

[0069] In this embodiment of the invention, the operating parameters of the high-zone plate heat exchanger unit can be dynamically adjusted based on heating demand. Alternatively, they can be adjusted according to different time periods. This ensures the performance of the large temperature difference heating system coupled with the heat pump and heat exchanger. The operating parameters will vary depending on the number of users requiring secondary heating in the high-zone area. Furthermore, the operating parameters of the high-zone plate heat exchanger unit can also be related to the laying of the primary-side supply and return water networks. For example, the length, material, and diameter of the primary-side supply water network are all relevant, as are the length, material, and diameter of the primary-side return water network.

[0070] Accordingly, in this embodiment of the invention, the operating parameters of the low-zone plate heat exchanger unit can be dynamically adjusted based on heating demand. Of course, they can also be adjusted based on different time periods, thereby ensuring the performance of the large temperature difference heating system coupled with the heat pump and heat exchanger. The operating parameters will differ depending on the number of users requiring heating on the secondary side of the low zone. Furthermore, the operating parameters of the low-zone plate heat exchanger unit can also be related to the laying of the primary side return water network, for example, its length, material, and pipe diameter.

[0071] Accordingly, in this embodiment of the invention, the operating parameters of the heat pump unit can be dynamically adjusted based on heating demand. Of course, they can also be adjusted based on different time periods, thereby ensuring the performance of the large temperature difference heating system coupled with the heat pump and heat exchanger. The operating parameters will differ depending on the number of users requiring secondary heating in the lower zones.

[0072] The temperature range of the primary water supply can be preset or set by the system default, for example, 90-100℃.

[0073] In this embodiment of the invention, primary-side supply water and primary-side return water refer to the supply and return of hot water on the heat source side in a heating system. In the heating system, the primary side refers to the heat source, such as hot water or steam from a boiler room. Primary-side supply water refers to high-temperature hot water from the heat source (such as a boiler), which carries heat to a heat exchanger (such as a plate heat exchanger) for heat exchange. Primary-side return water refers to water that has cooled down after releasing heat in the heat exchanger; it returns to the heat source for reheating, forming a cycle.

[0074] In this embodiment of the invention, the water replenishment pump is a key device in the centralized heating system for maintaining stable pressure and smooth water flow. It replenishes the circulating system with water to address water volume reduction caused by system leaks or temperature changes. The water replenishment pump can include high-zone and low-zone water replenishment pumps. Specifically, through automated control and precise adjustment, the water replenishment pump ensures the continuous and efficient operation of the heat exchanger and the entire heating network. This includes the following aspects: 1. Start-up and stop control: The operation of the water replenishment pump is controlled by a PLC or other control system, which monitors the system water pressure in real time using a pressure sensor. When the pressure is below a set threshold, the control system triggers a start signal; when the pressure reaches or exceeds the set value, it automatically stops. Some devices also integrate flow meters for dual water volume monitoring; 2. Flow and pressure regulation: Variable frequency speed control technology dynamically matches system requirements by changing the motor speed, achieving energy saving and consumption reduction, especially suitable for scenarios with large heat load fluctuations. Structural parameter optimization: Some pump bodies support the replacement of impellers with different diameters, or the flow rate can be adjusted through valve combinations to meet the parameter adaptation requirements during long-term operation; 3. During the pumping and water delivery process, the motor drives the impeller to rotate at high speed, generating centrifugal force to draw water from the storage tank or water tank into the pump body, and after acceleration, discharge it into the circulation pipeline through the outlet. This process relies on the impeller's hydrodynamic design to ensure that the water flow is stably injected into the system under high pressure; 4. Multiple safety protection mechanisms, equipped with overload protectors, temperature sensors, and vibration monitoring devices, can detect faults such as motor overheating and abnormal bearing wear in real time, triggering power outages or alarm signals to prevent further equipment damage.

[0075] In this embodiment of the invention, a heat pump unit can be understood as a device that exchanges heat with heat sources such as circulating water and geothermal energy (groundwater, soil, or surface water) and air to achieve cooling, heating, and domestic hot water supply. The components of a heat pump unit today include a user-side heat exchange device and a heat source-side heat exchange device.

[0076] In this embodiment of the invention, the plate heat exchanger unit can indirectly heat the circulating return water using steam or high-temperature water to meet the heating or air conditioning needs of users in high-altitude areas, and features high degree of automation and stable operation. The plate heat exchanger unit can include high-altitude and low-altitude plate heat exchanger units. For the plate heat exchanger unit, steam or high-temperature water enters the unit according to the system's required flow rate under the control of a temperature control valve, and then the return water undergoes pretreatment. Specifically, the return water from heat users is first filtered for impurities by a stainless steel core filter to prevent clogging of the heat exchanger. Then, it can be circulated and heated. The purified return water is pressurized by a circulating pump and enters the plate heat exchanger, where it exchanges heat with the heat medium and is heated before being delivered to users. Finally, the circulation can continue; the heated water supplied to users forms return water, which re-enters the unit to participate in the circulation, achieving continuous heating.

[0077] In this embodiment of the invention, the circulating pump can be referred to as a secondary pump. A secondary pump refers to a system in a fluid transport system (such as heating, air conditioning, industrial circulation, etc.) that achieves functional zoning through two series-connected pump loops. For example, the secondary pump can include a primary pump and a secondary pump. The primary pump (heat source / cold source side) is responsible for transporting the medium from the heat source (such as a boiler or cooling tower), with a relatively stable flow rate. The secondary pump (terminal side) adjusts the flow rate according to the terminal load (such as indoor air conditioning or heat exchangers), achieving variable flow operation through frequency conversion technology to reduce energy consumption. The circulating pump can have the following functions: energy saving; specifically, the secondary pump can independently adjust the flow rate, avoiding valve throttling losses in traditional single-pump systems, especially significantly reducing energy consumption under partial load conditions. Secondly, hydraulic decoupling; specifically, the primary and secondary loops are isolated through plate heat exchangers or mixing devices, solving the problem of mutual interference in terminal hydraulic conditions. Thirdly, flexibility; specifically, it is suitable for complex systems such as large buildings and district heating, supporting terminal zoning control. This circulating pump can include a first circulating pump, a second circulating pump, and a third circulating pump.

[0078] In this embodiment of the invention, the filter can be used to remove and filter impurities and dirt in pipelines to ensure the cleanliness of the water in the system, reduce resistance, and prevent blockage. The filter may include at least one of the following: self-cleaning filter, backwash filter, cyclone filter, angle filter, etc., without limitation. For example, an angle filter is a device used to remove and filter impurities and dirt in pipelines. Its core function is to ensure the cleanliness of the water in the system, reduce water flow resistance, and prevent pipeline blockage, thereby protecting the safe and reliable operation of the system equipment.

[0079] In this embodiment of the invention, the large temperature difference heating system coupled with a heat pump and heat exchanger may include: a high-zone plate heat exchanger unit, a primary-side supply water network, a primary-side return water network, a first circulating pump, a secondary-side supply water network, a secondary-side return water network, a second circulating pump, a low-zone plate heat exchanger unit, and a heat pump unit. The primary-side supply water network and the primary-side return water network are connected to the high-zone plate heat exchanger unit, which is also connected to the secondary-side supply water network and the secondary-side return water network. The secondary-side supply water network and the secondary-side return water network are used to achieve secondary-side heating in the high-zone, and the secondary-side return water network is connected to the first circulating pump. The primary return water pipe is connected to one side of the low-zone plate heat exchanger unit by two branch pipe networks (the middle part of these two branch pipe networks can be connected to the primary heat meter). On the other side of the low-zone plate heat exchanger unit (equivalent to the secondary side water supply network and secondary side return water network of the low zone), one branch pipe network is connected to the heat pump unit and the other branch pipe network is connected to one side of the heat pump unit through the second circulation pump. The other side of the heat pump unit is used to realize the secondary side heating of the low zone through two branch pipe networks.

[0080] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a first dirt separator;

[0081] The first circulating pump is first connected to the first dirt separator, and then the secondary side heating of the high zone is realized.

[0082] The first circulation pump can be called the second-stage pump. The second-stage pump refers to a system in a fluid transport system (such as heating, air conditioning, industrial circulation, etc.) that achieves functional zoning through two pump loops connected in series. The first circulation pump can have the following functions: energy saving, specifically, the second pump can independently adjust the flow rate, avoiding the valve throttling losses of traditional single pump systems, especially under partial load conditions, the energy consumption is significantly reduced; secondly, hydraulic decoupling, specifically, through plate heat exchangers or mixing devices, the problem of mutual interference of hydraulic conditions at the terminal is solved; and thirdly, flexibility, specifically, it is suitable for complex systems such as large buildings and district heating, and supports terminal zoning control.

[0083] The first filter can be used to remove and filter impurities and dirt in the pipeline to ensure the cleanliness of the water in the system, reduce resistance, and prevent clogging. The first filter may include at least one of the following: self-cleaning filter, backwash filter, cyclone filter, angle filter, etc., without limitation.

[0084] In practice, the first circulating pump is connected to the first dirt separator first, and then the secondary side heating in the high zone is realized. Since the first dirt separator is used to remove and filter impurities and dirt in the pipeline to ensure the cleanliness of the water in the system, reduce resistance and prevent blockage, it can ensure the stable and continuous heating of the large temperature difference heating system coupled with the heat pump and heat exchanger, and improve the heating efficiency of the large temperature difference heating system coupled with the heat pump and heat exchanger.

[0085] In practice, the first circulation pump can perform the following operations:

[0086] Obtain the first water flow rate, first water flow pressure, and heating demand parameters of the secondary return water network; the heating demand parameters include the number of first users requiring secondary heating in the high-rise area;

[0087] Determine the first reference working parameter corresponding to the first number of users;

[0088] Determine the first adjustment parameter corresponding to the first water flow rate;

[0089] Determine the first fine-tuning parameter corresponding to the first water flow pressure;

[0090] The first operating parameters of the first circulating pump are determined based on the first adjustment parameter, the first fine-tuning parameter, and the first reference operating parameter.

[0091] The first circulation pump may include a water flow sensor, which can be used to detect water flow rate and water flow pressure.

[0092] The operating parameters of the first circulating pump may include at least one of the following: flow rate, head, efficiency, operating power, operating voltage, operating current, etc., which are not limited here.

[0093] Specifically, a preset mapping relationship between the number of users and reference working parameters can be set in advance. Then, the first reference working parameter corresponding to the first number of users can be determined based on the mapping relationship. Of course, a preset mapping relationship between the water flow rate and the adjustment parameter can also be stored in advance. Then, the first adjustment parameter corresponding to the first water flow rate can be determined based on the mapping relationship. Furthermore, a preset mapping relationship between the water flow pressure and the fine-tuning parameter can also be stored in advance. Then, the first fine-tuning parameter corresponding to the first water flow pressure can be determined based on the mapping relationship.

[0094] The range of adjustment parameters can be preset or defaulted to by the system. For example, the range of adjustment parameters is -0.1 to 0.1. The range of fine-tuning parameters can also be preset or defaulted to by the system. For example, the range of fine-tuning parameters is -0.02 to 0.02. In specific implementation, the first operating parameters of the first circulating pump can be determined based on the first adjustment parameter, the first fine-tuning parameter, and the first reference operating parameter. Specifically, some or all of the reference operating parameters of the first reference operating parameter can be adjusted. For example, the first operating parameter = the first reference operating parameter × (1 + the first adjustment parameter) × (1 + the first fine-tuning parameter). The number of users reflects the actual heating demand. Therefore, the corresponding operating parameters can be initially determined based on the actual heating demand. Then, the water flow rate will affect the working efficiency of the circulating pump to a certain extent. Therefore, the operating parameters can be dynamically optimized based on the water flow rate. Furthermore, the water flow pressure also affects the working efficiency of the circulating pump to a certain extent. The operating parameters can be fine-tuned based on the influence of water flow pressure, so that the operating parameters of the first circulating pump are deeply adapted to the heating demand and the working environment, which helps to maximize the performance of the first circulating pump.

[0095] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a second dirt separator and a manifold.

[0096] The first circulating pump is connected to the water distribution manifold and the second dirt separator in sequence, and then the high-zone secondary side heating is realized.

[0097] In this embodiment of the invention, the manifold can be a key device in a large temperature difference heating system (water circulation system) coupled with a heat pump and a heat exchanger. The manifold can be mainly composed of two parts: a distributor and a collector. The core function of the manifold is to realize the distribution and collection of water flow, while also having functions such as filtering impurities, facilitating maintenance and improving system efficiency. It is an important component to ensure the stable operation of the system.

[0098] In practice, the first circulating pump is connected to the manifold and the second dirt separator in sequence to achieve secondary heating in the high zone. The manifold distributes and collects water flow. The second dirt separator has the functions of filtering impurities, facilitating maintenance, and improving system efficiency. It is an important component to ensure the stable operation of the system. In turn, it can ensure the stable and continuous heating of the large temperature difference heating system coupled with the heat pump and heat exchanger, and improve the heating efficiency of the large temperature difference heating system coupled with the heat pump and heat exchanger.

[0099] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a secondary heat meter;

[0100] The first circulating pump is connected to the water distributor via the secondary heat meter.

[0101] In this embodiment of the invention, the secondary heat meter can be understood as an intelligent instrument for measuring and metering the heat energy consumption in a large temperature difference heating system coupled with a heat pump and a heat exchanger. This large temperature difference heating system coupled with a heat pump and a heat exchanger can be mainly composed of a flow sensor, a temperature sensor, and an integrator. In specific implementation, heat can be accurately measured by calculating the flow rate, temperature difference, and time difference.

[0102] In practice, the first circulation pump connects to the manifold via a secondary heat meter, allowing for the measurement of heat in the secondary return water network and facilitating control of the heating efficiency in the high-rise secondary zones.

[0103] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a primary side heat meter;

[0104] The primary side return water network is connected to the high-zone plate heat exchanger unit through the primary side heat meter.

[0105] In this embodiment of the invention, the primary heat meter can be understood as an intelligent instrument for measuring and metering the heat energy consumption in a large temperature difference heating system coupled with a heat pump and a heat exchanger. This large temperature difference heating system coupled with a heat pump and a heat exchanger can be mainly composed of a flow sensor, a temperature sensor, and an integrator. In specific implementation, heat can be accurately measured by calculating the flow rate, temperature difference, and time difference.

[0106] In practice, the primary-side return water network is connected to the high-zone plate heat exchanger unit via a primary-side heat meter. This allows for the measurement of heat in the primary-side return water network using secondary-side heat meters, facilitating the control of the operating parameters of either the high-zone or low-zone plate heat exchanger unit. Ultimately, this enhances the intelligence of the large temperature difference heating system coupled with the heat pump and heat exchanger.

[0107] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a low-zone electric regulating valve;

[0108] The primary heat meter is connected to the low-zone plate heat exchanger unit via the low-zone electric regulating valve.

[0109] Among them, the low-zone electric regulating valve of the large temperature difference heating system coupled with heat pump and heat exchanger can be mainly used to control the flow and temperature of the low-zone heating pipe. Specifically, it can dynamically adjust the valve opening by receiving control signals to ensure that the low-zone heating temperature is stable at the set value. For example, the valve opening can be dynamically adjusted based on the heating demand so that the heating effect corresponds to the actual heating demand.

[0110] In practice, the primary heat meter is connected to the low-zone plate heat exchanger unit through the low-zone electric regulating valve. Thus, the valve opening can be dynamically adjusted based on the low-zone heating demand, so that the heating effect corresponds to the actual heating demand.

[0111] In practice, the low-zone electric regulating valve can be adjusted as follows:

[0112] Obtain the number of users receiving secondary heating in the lower zone during a preset time period;

[0113] A fitting curve is obtained by fitting the data based on the number of users.

[0114] Determine the corresponding adjustment curve based on the fitted curve;

[0115] The valve opening of the low-zone electric regulating valve is adjusted according to the adjustment curve.

[0116] In practice, the preset time period can be pre-set or set by system default. Since the preset time period can include a certain period of time, multiple time points can be obtained by sampling based on the number of users within that period. Each time point corresponds to a number of users. These multiple time points and their corresponding number of users are regarded as multiple coordinate points. A fitting curve is obtained based on these multiple coordinate points. The horizontal axis of the fitting curve is time, and the vertical axis is the number of users. Specifically, the more users there are, the larger the valve opening is, and vice versa. Thus, the low-zone electric regulating valve can be dynamically adjusted based on the actual change in the number of users. That is, the valve opening changes accordingly with the change in the number of users, so as to balance the supply and demand on the heat source side and the user side. This can improve the performance and intelligence of the large temperature difference heating system coupled with the heat pump and heat exchanger.

[0117] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a high-zone makeup water pump and a low-zone makeup water pump.

[0118] The secondary side return water network is connected to the first water source through the high-zone water supply pump;

[0119] One branch network of the heat pump unit is connected to the first water source through the low-zone makeup water pump.

[0120] In practice, the secondary return water network is connected to the first water source through the high-zone makeup water pump, and a branch network of the heat pump unit is connected to the first water source through the low-zone makeup water pump. That is, based on the actual application scenario requirements, the two makeup water pumps can also be connected to the same water source.

[0121] In specific implementation, such as Figure 2 As shown, the primary return water from the upstream heat exchange station of the newly added heat exchange station is used as the supply water for the downstream residential area. It enters the plate heat exchanger for heat exchange, and after heat exchange by the heat pump unit, it supplies heating to the residential area, avoiding the need for renovation of older residential areas. Alternatively, heat pump units are added to the existing heat exchange station in the residential area. After heat exchange, the temperature drops to 30℃ before returning to the plant for heating, increasing the temperature difference between the primary supply and return water, increasing the heating area, solving the problem of insufficient heating capacity in the heating company's pipeline network, and also avoiding the difficulties caused by inconvenient construction.

[0122] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a high-zone makeup water pump and a low-zone makeup water pump.

[0123] The secondary side return water network is connected to the first water source through the high-zone water supply pump;

[0124] One branch network of the heat pump unit is connected to the second water source via the low-zone makeup water pump.

[0125] The first water source and the second water source can be different water sources.

[0126] In practice, the secondary return water network is connected to the first water source through the high-zone makeup water pump, and a branch network of the heat pump unit is connected to the second water source through the low-zone makeup water pump. That is, the two water sources are different water sources. For example, the two water sources can be water sources close to the corresponding side return water network. In this way, the cost of laying the network can be reduced and the heating efficiency of the large temperature difference heating system coupled with the heat pump and heat exchanger can be improved.

[0127] In practice, for the primary side process, the primary side supply water (90-100℃) generated by the heating company enters the newly added heat exchange station users, with one path leading to the high-zone plate heat exchanger unit and the other to the low-zone plate heat exchanger unit. The high-zone and low-zone primary sides are a series system. The return water (60℃) from the high-zone primary side enters the low-zone plate heat exchanger unit, and after heat exchange, the water temperature drops to about 30℃ before returning to the heating company for circulation. For the secondary side process, in the high-zone secondary side: the secondary side supply water (45℃) is sent to the user terminal for heat exchange. After heat exchange, the secondary side return water temperature (35℃) is pumped through a circulation pump and enters the high-zone plate heat exchanger unit for heat exchange circulation. In the low-zone secondary side: the heat pump return water enters the low-zone plate heat exchanger unit, and after heat exchange, it enters the heat pump unit. After being boosted to 45℃ by the heat pump unit, it drops to 35℃ after heat exchange before entering the heat pump unit for circulation.

[0128] In this embodiment of the invention, an electric heat pump can be combined with a conventional heat exchanger to form a large temperature difference heat exchange unit, thereby increasing the temperature difference between the supply and return water of the heating network and increasing the heating area.

[0129] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger also includes: a high-zone electric regulating valve;

[0130] The primary water supply network is connected to the high-zone plate heat exchanger unit via the high-zone electric regulating valve.

[0131] Among them, the high-zone electric regulating valve of the large temperature difference heating system coupled with heat pump and heat exchanger can be mainly used to control the flow and temperature of the high-zone heating pipe. Specifically, it can dynamically adjust the valve opening by receiving control signals to ensure that the high-zone heating temperature is stable at the set value. For example, the valve opening can be dynamically adjusted based on the high-zone heating demand so that the heating effect corresponds to the actual heating demand.

[0132] In practice, the primary water supply network uses a high-zone electric regulating valve and a high-zone plate heat exchanger unit. This allows for dynamic adjustment of the valve opening based on heating demand, ensuring that the heating effect corresponds to the actual heating requirement.

[0133] In this embodiment of the invention, the initial investment can be reduced while increasing the heating area for users, based on the needs of different users of various heating companies, while reducing construction costs.

[0134] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger may also include: a third dirt separator;

[0135] The heat pump unit is first connected to the third dirt remover, and then the secondary side heating in the low zone is realized.

[0136] The third filter can be used to remove and filter impurities and dirt in the pipeline to ensure the cleanliness of the water in the system, reduce resistance, and prevent clogging. The third filter may include at least one of the following: self-cleaning filter, backwash filter, cyclone filter, angle filter, etc., without limitation.

[0137] In practice, the heat pump unit is first connected to the third filter, and then the secondary side heating in the low zone is realized. Since the third filter is used to remove and filter impurities and dirt in the pipeline to ensure the cleanliness of the water in the system, reduce resistance and prevent blockage, it can ensure the stable and continuous heating of the large temperature difference heating system coupled with the heat pump and heat exchanger, and improve the heating efficiency of the large temperature difference heating system coupled with the heat pump and heat exchanger.

[0138] In some possible application scenarios, the large temperature difference heating system coupled with the heat pump and heat exchanger may also include: a third circulation pump;

[0139] The heat pump unit is first connected to the third circulation pump, and then the secondary side heating in the low zone is realized.

[0140] The third circulation pump can be called a secondary pump. A secondary pump refers to a system in a fluid transport system (such as heating, air conditioning, industrial circulation, etc.) that achieves functional zoning through two pump loops connected in series. This third circulation pump can have the following functions: energy saving, specifically, the secondary pump can independently adjust the flow rate, avoiding the valve throttling losses of traditional single pump systems, especially under partial load conditions, the energy consumption is significantly reduced; secondly, hydraulic decoupling, specifically, through plate heat exchangers or mixing devices, the problem of mutual interference of hydraulic conditions at the terminal is solved; and thirdly, flexibility, specifically, it is suitable for complex systems such as large buildings and district heating, and supports terminal zoning control.

[0141] In this embodiment of the invention, the heat pump unit is first connected to the third circulation pump, and then the secondary side heating in the low zone is realized. In this way, the large temperature difference heating system coupled with the heat pump and the heat exchanger can be guaranteed to provide stable and continuous heating, and the heating efficiency of the large temperature difference heating system coupled with the heat pump and the heat exchanger can be improved.

[0142] As can be seen, the large temperature difference heating system coupled with a heat pump and heat exchanger described in this embodiment of the invention includes: a high-zone plate heat exchanger unit, a primary side supply water network, a primary side return water network, a first circulating pump, a secondary side supply water network, a secondary side return water network, a second circulating pump, a low-zone plate heat exchanger unit, and a heat pump unit. The primary side supply water network and the primary side return water network are connected to the high-zone plate heat exchanger unit; the high-zone plate heat exchanger unit is also connected to the secondary side supply water network and the secondary side return water network; the secondary side supply water network and the secondary side return water network are used to realize secondary side heating in the high-zone; the secondary side return water network is connected to the first circulating pump; the primary side return water pipe is connected to one side of the low-zone plate heat exchanger unit via two branch networks; one branch network on the other side of the low-zone plate heat exchanger unit is connected to the heat pump unit, and the other branch network is connected to one side of the heat pump unit via the second circulating pump; the other side of the heat pump unit is connected to the heat pump unit via two branch networks. The network is used to provide secondary heating in the low-zone area. Therefore, for the primary side process, the primary side supply water (90-100℃) generated by the heating company enters the newly added heat exchange station users. One path leads to the high-zone plate heat exchanger unit, and the other path leads to the low-zone plate heat exchanger unit. The high-zone and low-zone primary sides are a series system. The return water (60℃) from the high-zone primary side enters one side of the low-zone plate heat exchanger unit. After heat exchange, the water temperature drops to around 30℃ and returns to the heating company for circulation. For the secondary side process, the high-zone secondary side process is as follows: the secondary side supply water (45℃) is sent to the user terminal for heat exchange. After the heat exchange is completed, the secondary side return water temperature (35℃) enters the high-zone plate heat exchanger unit for heat exchange circulation after passing through the circulation pump. The low-zone secondary side process is as follows: the heat pump return water enters the low-zone plate heat exchanger unit, and after heat exchange, it enters the heat pump unit. After being raised by the heat pump unit to 45℃, it drops to 35℃ after heat exchange and enters the heat pump unit for circulation.

[0143] In this embodiment of the invention, the high-zone plate heat exchanger, first circulation pump, second circulation pump, low-zone plate heat exchanger, heat pump unit, third circulation pump, high-zone electric regulating valve, low-zone electric regulating valve, and manifold in the above-mentioned large temperature difference heating system coupled with a heat pump and heat exchanger can all be regarded as intelligent modules. Each intelligent module can be independently controlled to adapt the corresponding operating parameters based on actual heating needs or working environment, thereby enabling the large temperature difference heating system coupled with a heat pump and heat exchanger to possess deep intelligence. Of course, the high-zone plate heat exchanger, first circulation pump, second circulation pump, low-zone plate heat exchanger, heat pump unit, third circulation pump, high-zone electric regulating valve, low-zone electric regulating valve, and manifold in the above-mentioned large temperature difference heating system coupled with a heat pump and heat exchanger can all be regarded as working in conjunction with each other. The deep cooperation between the various modules makes the overall performance of the large temperature difference heating system coupled with a heat pump and heat exchanger coordinated, thereby ensuring the overall working efficiency of the large temperature difference heating system coupled with a heat pump and heat exchanger.

[0144] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A large temperature difference heat supply system coupled with a heat pump and a heat exchanger, characterized in that, The heat pump and heat exchanger coupled large temperature difference heating system comprises a high zone plate heat exchanger unit, a primary side water supply pipe network, a primary side return water pipe network, a first circulating pump, a secondary side water supply pipe network, a secondary side return water pipe network, a second circulating pump, a low zone plate heat exchanger unit, a heat pump unit, a primary side heat meter, and a low zone electric regulating valve, wherein the primary side return water pipe network is communicated with the high zone plate heat exchanger unit through the primary side heat meter, the primary side heat meter is communicated with the low zone plate heat exchanger unit through the low zone electric regulating valve, and the primary side water supply pipe network and the primary side return water pipe network are communicated with the high zone plate heat exchanger unit. The high zone plate heat exchanger unit is further communicated with the secondary side water supply pipe network and the secondary side return water pipe network, the secondary side water supply pipe network and the secondary side return water pipe network are used to realize high zone secondary side heating, and the secondary side return water pipe network is communicated with the first circulating pump. The primary side return water pipe is communicated with one side of the low zone plate heat exchanger unit through two branch pipe networks, one branch pipe network of the other side of the low zone plate heat exchanger unit is communicated with the heat pump unit and another branch pipe network is communicated with one side of the heat pump unit through the second circulating pump, and the other side of the heat pump unit is communicated with two branch pipe networks and used to realize low zone secondary side heating. The low zone electric regulating valve is adjusted in the following manner: obtaining a user quantity of low zone secondary side heating in a preset time period, fitting based on the user quantity to obtain a fitting curve, determining a corresponding adjustment curve according to the fitting curve, and adjusting a valve opening degree of the low zone electric regulating valve according to the adjustment curve. The first circulating pump performs the following operations: obtaining a first water flow rate, a first water flow pressure and a heating demand parameter of the secondary side return water pipe network, the heating demand parameter comprising a first user quantity of high zone secondary side heating, determining a first reference working parameter corresponding to the first user quantity, determining a first adjustment parameter corresponding to the first water flow rate, determining a first fine adjustment parameter corresponding to the first water flow pressure, and determining a first working parameter of the first circulating pump according to the first adjustment parameter, the first fine adjustment parameter and the first reference working parameter. The heat pump and heat exchanger coupled large temperature difference heating system further comprises a first dirt separator. The first circulating pump is first communicated with the first dirt separator, and then realizes the high zone secondary side heating. The heat pump and heat exchanger coupled large temperature difference heating system further comprises a second dirt separator and a distribution water collector. The first circulating pump is first communicated with the distribution water collector and the second dirt separator in sequence, and then realizes the high zone secondary side heating. The heat pump and heat exchanger coupled large temperature difference heating system further comprises a secondary side heat meter. The first circulating pump is first communicated with the distribution water collector through the secondary side heat meter. The heat pump and heat exchanger coupled large temperature difference heating system further comprises a high zone water supplement pump and a low zone water supplement pump. The secondary side return water pipe network is communicated with a first water source through the high zone water supplement pump. One branch pipe network of the heat pump unit is communicated with the first water source through the low zone water supplement pump.

2. The large temperature difference heat supply system of claim 1, wherein, ​ ​ 3. The large temperature difference heat supply system of claim 2, wherein, ​ ​ 4. The large temperature difference heat supply system of claim 3, wherein, ​ ​ 5. The large temperature difference heating system of claim 1-4, wherein, ​ ​ ​ 6. The large temperature difference heating system of claim 1-4, wherein, The heat pump and heat exchanger coupled large temperature difference heat supply system further comprises a high area water supplement pump and a low area water supplement pump; The secondary side return water pipe network is connected with a first water source through the high area water supplement pump; One branch pipe network of the heat pump unit is connected with a second water source through the low area water supplement pump.

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