Heating system
By designing a high-efficiency direct-connection mixing water heating system and utilizing multi-stage pressurization and depressurization devices, the problem of high pressurization energy consumption in traditional systems is solved, achieving precise temperature control and rapid response, thereby improving the energy efficiency of the heating system and user comfort.
Patent Information
- Application Number
- CN202423090420.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-13
AI Technical Summary
In traditional high-rise direct-connection plate heat exchanger heating systems, the booster pumps installed in user areas with larger heights consume a lot of energy when pressurizing water, and the system response is slow, temperature regulation is inaccurate, and energy utilization efficiency is low.
The high-speed direct-connection mixing water heating system adopts an inlet water pipe, a water supply structure and an outlet water pipe, and uses multiple pressurization and depressurization devices to pressurize the water in the heating area step by step, reducing energy consumption, and achieves precise temperature control through the mixing device.
It improves the temperature regulation accuracy and response speed of the heating system, reduces energy consumption, enhances energy utilization efficiency, and ensures user comfort and system flexibility.
Smart Images
Figure CN223484328U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heating system technology, and more specifically, to a heating system. Background Technology
[0002] When providing heating, either a traditional high-direct-connection plate heat exchanger unit or a high-direct-connection mixing water heating system can be used.
[0003] In existing technologies, traditional high-speed direct-connection plate heat exchanger units have some drawbacks:
[0004] (1) Low temperature regulation accuracy: In traditional plate heat exchanger heating systems, temperature regulation may not be precise enough, resulting in large fluctuations in hot water temperature, which affects user comfort and the effective use of energy.
[0005] (2) Low energy efficiency: Due to inaccurate temperature control, the heating system may require additional energy to compensate for the loss caused by temperature fluctuations, resulting in low energy efficiency.
[0006] (3) Slow system response speed: Traditional plate heat exchanger heating systems may have a slow response speed and cannot quickly adapt to changes in user needs, especially during seasonal changes or sudden weather changes.
[0007] The high-speed direct-connection mixing water heating system is an innovative solution designed to meet the needs of modern urban district heating systems. Traditional district heating systems, such as high-speed direct-connection plate heat exchanger systems, face numerous challenges in terms of heating efficiency, response speed, and energy utilization. Issues include inaccurate temperature control and high energy consumption, failing to effectively meet users' demands for comfort and energy conservation. The high-speed direct-connection mixing water heating system, through the introduction of advanced control technology and optimized heating network design, achieves precise control and stable regulation of hot water temperature, significantly improving system energy efficiency and operational performance, and bringing new technological advancements and development opportunities to the urban heating sector.
[0008] However, when using a high-level direct-connection mixing water heating system, multiple booster pumps need to be set up to correspond to multiple user areas to heat user areas at different heights. This means that the booster pumps set up for user areas with higher heights need to consume more energy to pressurize the water in order to maintain the water pressure. Utility Model Content
[0009] The main objective of this invention is to provide a heating system that solves the problem in related technologies where booster pumps installed for user areas with high elevations require excessive energy consumption when pressurizing water.
[0010] To achieve the above objectives, according to one aspect of the present invention, a heating system is provided, comprising: a water inlet pipe, a first end of which is a water inlet, a second end of which is connected to a first heating zone, and a first water outlet located in the middle of the water inlet pipe; a first pressurizing device, which is disposed on the water inlet pipe and located upstream of the first water outlet; and a water supply structure, comprising a first water supply pipe, a second pressurizing device disposed on the first water supply pipe, a second water supply pipe, and a second pressurizing device disposed on the second water outlet. The third pressurization device on the water supply pipeline; the first end of the first water supply pipeline is connected to the first water outlet; the second end of the first water supply pipeline is connected to the second heating zone; the second water outlet is provided in the middle of the first water supply pipeline; the first end of the second water supply pipeline is connected to the second water outlet; and the second end of the second water supply pipeline is connected to the third heating zone; the water outlet pipeline is connected to the first heating zone, the second heating zone, and the third heating zone; wherein the first heating zone, the second heating zone, and the third heating zone are arranged sequentially from bottom to top.
[0011] Furthermore, the first pressurizing device includes a first pressurizing pump, the second pressurizing device includes a second pressurizing pump, and the third pressurizing device includes a third pressurizing pump.
[0012] Furthermore, the first end of the outlet pipe is connected to the first heating zone, the second end of the outlet pipe is the outlet end, and the first inlet is provided in the middle of the outlet pipe. The heating system also includes a drainage structure, which is connected between the third outlet of the second heating zone, the fourth outlet of the third heating zone, and the first inlet.
[0013] Furthermore, the drainage structure includes a first drainage pipe and a second drainage pipe. A second inlet is provided in the middle of the first drainage pipe. The first end of the first drainage pipe is connected to the third outlet of the second heating zone. The second end of the first drainage pipe is connected to the first inlet of the outlet pipe. The first end of the second drainage pipe is connected to the fourth outlet of the third heating zone. The second end of the second drainage pipe is connected to the second inlet of the first drainage pipe.
[0014] Furthermore, the drainage structure also includes a first pressure reducing device installed on the first drainage pipe, which is located downstream of the second water inlet.
[0015] Furthermore, the first pressure reducing device includes a first pressure reducing valve.
[0016] Furthermore, the drainage structure also includes a second pressure reducing device installed on the second drainage pipe.
[0017] Furthermore, the second pressure reducing device includes a second pressure reducing valve.
[0018] Furthermore, the outlet pipe has a fifth outlet, the inlet pipe has a third inlet located upstream of the first pressurizing device, and the heating system also includes a mixing device connected between the third inlet and the fifth outlet.
[0019] Furthermore, the fifth outlet is located downstream of the first inlet.
[0020] The heating system, utilizing the technical solution of this utility model, includes an inlet pipe, a first pressurizing device, a water supply structure, and an outlet pipe. The first end of the inlet pipe is the inlet end, and the second end of the inlet pipe is connected to the first heating zone. The first pressurizing device is installed on the inlet pipe and located upstream of the first outlet located in the middle of the inlet pipe. The water supply structure includes a first water supply pipe, a second pressurizing device, a third pressurizing device, and a fourth water supply pipe. The second pressurizing device is installed on the first water supply pipe, and the third pressurizing device is installed on the second water supply pipe. The first end of the first water supply pipe is connected to the first outlet, and the second end of the first water supply pipe is connected to the second heating zone. The first end of the second water supply pipe is connected to the second outlet located in the middle of the first water supply pipe, and the second end of the second water supply pipe is connected to the third heating zone. The outlet pipe is connected to all three heating zones. The first, second, and third heating zones are arranged from bottom to top. With the above setup, water enters the inlet pipe through the first end, and then a portion of the water enters the first heating zone through the second end of the inlet pipe to provide heat, while another portion flows into the first supply water pipe through the first outlet. Of the water flowing into the first supply water pipe, a portion enters the second heating zone through the second end to provide heat, and the remaining portion enters the second supply water pipe through the second outlet. The water flowing into the second supply water pipe enters the third heating zone through the second end to provide heat. Water flowing into the first, second, and third heating zones via the first pressurizing device can flow out through the outlet pipe. The first pressurizing device pressurizes the water entering the inlet pipe to ensure water pressure in the first heating zone. The second pressurizing device pressurizes the water flowing into the first supply water pipe to ensure water pressure in the second heating zone. The third pressurizing device pressurizes the water flowing into the second supply water pipe to ensure water pressure in the third heating zone. Therefore, the technical solution of this application effectively solves the problem in related technologies that the booster pump installed for user areas with large heights needs to consume a lot of energy when pressurizing water. Attached Figure Description
[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0022] Figure 1 A schematic diagram of an embodiment of the heating system according to the present invention is shown.
[0023] The above figures include the following reference numerals:
[0024] 1. First heating zone; 2. Second heating zone; 3. Third heating zone; 10. Inlet water pipe; 20. First pressurizing device; 30. Water supply structure; 31. First water supply pipe; 32. Second pressurizing device; 33. Second water supply pipe; 34. Third pressurizing device; 40. Outlet water pipe; 50. Drainage structure; 51. First drainage pipe; 52. Second drainage pipe; 53. First pressure reducing device; 54. Second pressure reducing device; 60. Mixing device. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0028] The heating system in this embodiment is a high-direct-connection mixing system, which has the following advantages:
[0029] (1) Improved temperature regulation accuracy: The high-precision direct-connection mixing system adopts advanced control technology and optimized heating network design, enabling precise control and stable regulation of hot water temperature. This ensures users receive a stable and comfortable heating environment and reduces energy waste.
[0030] (2) Improved energy efficiency: By precisely controlling the hot water supply temperature, the high-efficiency direct-connection mixing system can reduce energy consumption and improve the energy efficiency of the heating system. This helps to reduce operating costs and reduce environmental impact.
[0031] (3) Improved system response speed: The high-speed direct-connection mixing system is designed flexibly and can quickly respond to changes in user needs. This means that the system can quickly adjust the hot water supply temperature during seasonal changes or sudden weather changes to ensure user comfort.
[0032] like Figure 1 As shown, the heating system of this embodiment includes: an inlet pipe 10, a first pressurizing device 20, a water supply structure 30, and an outlet pipe 40. The first end of the inlet pipe 10 is the inlet end, the second end of the inlet pipe 10 is connected to the first heating zone 1, and a first outlet is provided in the middle of the inlet pipe 10. The first pressurizing device 20 is installed on the inlet pipe 10 and located upstream of the first outlet. The water supply structure 30 includes a first water supply pipe 31, a second pressurizing device 32 installed on the first water supply pipe 31, a second water supply pipe 33 installed on the first water supply pipe 31, and a third pressurizing device 34 installed on the second water supply pipe 33. The first end of the first water supply pipe 31 is connected to the first outlet, the second end of the first water supply pipe 31 is connected to the second heating zone 2, a second outlet is provided in the middle of the first water supply pipe 31, the first end of the second water supply pipe 33 is connected to the second outlet, and the second end of the second water supply pipe 33 is connected to the third heating zone 3. The water outlet pipe 40 is connected to the first heating zone 1, the second heating zone 2, and the third heating zone 3. The first heating zone 1, the second heating zone 2, and the third heating zone 3 are arranged sequentially from bottom to top.
[0033] Using the technical solution of this embodiment, the heating system includes an inlet pipe 10, a first pressurizing device 20, a water supply structure 30, and an outlet pipe 40. The first end of the inlet pipe 10 is the inlet end, and the second end of the inlet pipe 10 is connected to the first heating zone 1. The first pressurizing device 20 is installed on the inlet pipe 10 and is located upstream of the first outlet located in the middle of the inlet pipe 10. The water supply structure 30 includes a first water supply pipe 31, a second pressurizing device 32, a second water supply pipe 33, and a third pressurizing device 34. The second pressurizing device 32 is installed on the first water supply pipe 31, and the third pressurizing device 34 is installed on the second water supply pipe 33. The first end of the first water supply pipe 31 is connected to the first water outlet, the second end of the first water supply pipe 31 is connected to the second heating zone 2, the first end of the second water supply pipe 33 is connected to the second water outlet located in the middle of the first water supply pipe 31, and the second end of the second water supply pipe 33 is connected to the third heating zone 3. The water outlet pipe 40 is connected to the first heating zone 1, the second heating zone 2, and the third heating zone 3. The first heating zone 1, the second heating zone 2, and the third heating zone 3 are arranged from bottom to top. Through the above arrangement, water can enter the inlet pipe 10 through the first end, and then a portion of the water enters the first heating zone 1 through the second end of the inlet pipe 10 to heat the first heating zone 1, while a portion of the water flows into the first water supply pipe 31 through the first water outlet. Water flowing into the first water supply pipe 31 is divided into two parts: a portion enters the second heating zone 2 through the second end of the first water supply pipe 31 to provide heat to the second heating zone 2, and the other portion enters the second water supply pipe 33 through the second outlet. Water flowing into the second water supply pipe 33 enters the third heating zone 3 through the second end of the second water supply pipe 33 to provide heat to the third heating zone 3. Water flowing into the first heating zone 1, the second heating zone 2, and the third heating zone 3 through the first pressurizing device 20 can flow out through the outlet pipe 40. The first pressurizing device 20 can pressurize the water entering the inlet pipe 10 to ensure the water pressure in the first heating zone 1. The second pressurizing device 32 can pressurize the water flowing into the first water supply pipe 31 to ensure the water pressure in the second heating zone 2. The third pressurizing device 34 can pressurize the water flowing into the second water supply pipe 33 to ensure the water pressure in the third heating zone 3. Therefore, the technical solution of this embodiment effectively solves the problem of high energy consumption caused by pressurizing water flowing into the first heating zone and the second heating zone separately in the related technology.
[0034] It should be noted that the middle part of the water inlet pipe refers to any position from the first end to the second end of the water inlet pipe, and is not limited to the middle position of the water inlet pipe.
[0035] The first pressurizing device 20 is located upstream of the first outlet, meaning that water flows through the first pressurizing device 20 first and then through the first outlet.
[0036] In the heating system of this embodiment, the water is gradually pressurized as it flows through the first pressurizing device 20, the second pressurizing device 32, and the third pressurizing device 34 in sequence, thereby reducing the energy consumption in the prior art. This solves the problem of high energy consumption caused by pressurizing the water flowing into the first heating zone 1 and the water flowing into the second heating zone 2 respectively.
[0037] like Figure 1 As shown, in this embodiment, the first pressurizing device 20 includes a first pressurizing pump, the second pressurizing device 32 includes a second pressurizing pump, and the third pressurizing device 34 includes a third pressurizing pump. The first pressurizing pump can pressurize the water flowing into the inlet pipe 10. The second pressurizing pump can pressurize the water flowing into the first water supply pipe 31. The third pressurizing pump can pressurize the water flowing into the second water supply pipe 33.
[0038] like Figure 1 As shown, in this embodiment, the first end of the outlet pipe 40 is connected to the first heating zone 1, the second end of the outlet pipe 40 is the outlet end, and a first inlet is provided in the middle of the outlet pipe 40. The heating system also includes a drainage structure 50, which is connected between the third outlet of the second heating zone 2, the fourth outlet of the third heating zone 3, and the first inlet. Water from the first heating zone 1 can flow out through the first end of the outlet pipe 40 and out of the outlet pipe 40 through the second end. Water from the second heating zone 2 can flow into the drainage structure 50 through the third outlet, water from the third heating zone 3 can flow into the drainage structure 50 through the fourth outlet, and water in the drainage structure 50 can flow into the outlet pipe 40 through the first inlet.
[0039] like Figure 1 As shown, in this embodiment, the drainage structure 50 includes a first drainage pipe 51 and a second drainage pipe 52. A second inlet is provided in the middle of the first drainage pipe 51. The first end of the first drainage pipe 51 is connected to the third outlet of the second heating zone 2, and the second end of the first drainage pipe 51 is connected to the first inlet of the outlet pipe 40. The first end of the second drainage pipe 52 is connected to the fourth outlet of the third heating zone 3, and the second end of the second drainage pipe 52 is connected to the second inlet of the first drainage pipe 51. Water from the second heating zone 2 can flow into the first drainage pipe 51 through the first end of the first drainage pipe 51. Water from the third heating zone 3 can flow into the second drainage pipe 52 through the first end of the second drainage pipe 52, then through the second end of the second drainage pipe 52 to the second inlet, and finally into the first drainage pipe 51.
[0040] like Figure 1 As shown, in this embodiment, the drainage structure 50 further includes a first pressure reducing device 53 disposed on the first drainage pipe 51, and the first pressure reducing device 53 is located downstream of the second water inlet. The first pressure reducing device 53 can reduce the water pressure in the first drainage pipe 51.
[0041] The first pressure reducing device 53 is located downstream of the second water inlet, meaning that the water first passes through the second water inlet and then flows to the first pressure reducing device 53.
[0042] like Figure 1 As shown, in this embodiment, the first pressure reducing device 53 includes a first pressure reducing valve. When water in the first drain pipe 51 passes through the first pressure reducing valve, the water pressure can be reduced.
[0043] like Figure 1 As shown, in this embodiment, the drainage structure 50 further includes a second pressure reducing device 54 disposed on the second drainage pipe 52. The second pressure reducing device 54 can reduce the water pressure in the second drainage pipe 52.
[0044] like Figure 1 As shown, in this embodiment, the second pressure reducing device 54 includes a second pressure reducing valve. When water in the second drain pipe 52 passes through the second pressure reducing valve, the water pressure can be reduced.
[0045] like Figure 1 As shown, in this embodiment, the outlet pipe 40 has a fifth outlet, and the inlet pipe 10 has a third inlet located upstream of the first pressurizing device 20. The heating system also includes a mixing device 60, which is connected between the third inlet and the fifth outlet. A portion of the water from the outlet pipe 40 flows through the fifth outlet to the mixing device 60, then through the mixing device 60 back into the inlet pipe 10 via the third inlet, where it mixes with the water flowing in from the first end of the inlet pipe 10. After mixing, the mixture is pressurized by the first pressurizing device 20.
[0046] The third inlet is located upstream of the first pressurizing device 20, meaning that the water flows into the third inlet first and then through the first pressurizing device 20.
[0047] The mixing device 60 is a mixing pump.
[0048] like Figure 1 As shown, in this embodiment, the fifth outlet is located downstream of the first inlet. This allows water flowing into the outlet pipe 40 through the first inlet to flow out through the outlet pipe 40 in part and into the mixing device 60 through the fifth outlet in part.
[0049] This embodiment provides a high-efficiency direct-connection mixing water heating system. For heating in the low, middle and high zones of a heat exchange station, an energy-saving heating system is achieved by setting up a mixing water pump system connected in series in the low, middle and high zones.
[0050] The first heating zone 1 is the low zone, the second heating zone 2 is the medium zone, and the third heating zone 3 is the high zone.
[0051] The heating system in this embodiment includes a third pressurizing device 34, a second pressurizing device 32, a mixing device 60, a first pressurizing device 20, a third heating zone 3, a second heating zone 2, a first heating zone 1, a second pressure reducing device 54, and a first pressure reducing device 53.
[0052] The high-temperature hot water is first mixed with the return water from the heating system via a mixing device to lower the supply temperature to the user's required temperature. Then, it first enters the first pressurization device 20, and is then split into two streams. One stream enters the first heating zone 1 to supply heat to the first heating zone 1, while the other stream enters the second pressurization device 32. After passing through the second pressurization device 32, it is again split into two streams. One stream enters the second heating zone 2 to supply heat to the second heating zone 2, and the other stream enters the third pressurization device 34. After passing through the third pressurization device 34, it enters the third heating zone 3 to supply heat to the third heating zone 3. Because the return water pressure from the third heating zone 3 is higher, it is first reduced by the second pressure reducing device 54 to match the return water pressure from the second heating zone 2 and mixed. Then, it is reduced by the first pressure reducing device 53 to match the return water pressure from the first heating zone 1, ultimately achieving normal return water operation of the heating network.
[0053] The heating system of this embodiment has the following advantages:
[0054] (1) The mixed water method avoids the problems of plate heat exchanger resistance and temperature control difficulties caused by the indirect supply method;
[0055] (2) By adopting a series pressurization method of low zone, medium zone and high zone, the energy consumption of water supply pressurization in the medium zone and high zone is effectively reduced and the heating efficiency is improved.
[0056] (3) Improved temperature regulation accuracy: The high-precision direct-connection mixing system adopts advanced control technology and optimized heating network design, enabling precise control and stable regulation of hot water temperature. This ensures users receive a stable and comfortable heating environment and reduces energy waste.
[0057] (4) Improved energy efficiency: By precisely controlling the hot water supply temperature, the high-efficiency direct-connection mixing system can reduce energy consumption and improve the energy efficiency of the heating system. This helps to reduce operating costs and reduce environmental impact.
[0058] (5) Improved system response speed: The high-speed direct-connection mixing system is designed flexibly and can quickly respond to changes in user needs. This means that the system can quickly adjust the hot water supply temperature during seasonal changes or sudden weather changes to ensure user comfort.
[0059] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.
[0060] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0061] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0062] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A heating system, characterized in that, include: Water inlet pipe (10), the first end of the water inlet pipe (10) is the water inlet end, the second end of the water inlet pipe (10) is connected to the first heating zone (1), and the middle part of the water inlet pipe (10) is provided with a first water outlet; The first pressurizing device (20) is installed on the water inlet pipe (10) and located upstream of the first water outlet; The water supply structure (30) includes a first water supply pipe (31), a second pressurizing device (32) installed on the first water supply pipe (31), a second water supply pipe (33), and a third pressurizing device (34) installed on the second water supply pipe (33). The first end of the first water supply pipe (31) is connected to the first water outlet, the second end of the first water supply pipe (31) is connected to the second heating zone (2), the middle part of the first water supply pipe (31) is provided with a second water outlet, the first end of the second water supply pipe (33) is connected to the second water outlet, and the second end of the second water supply pipe (33) is connected to the third heating zone (3). The water outlet pipe (40) is connected to the first heating zone (1), the second heating zone (2) and the third heating zone (3); The first heating zone (1), the second heating zone (2), and the third heating zone (3) are arranged sequentially from bottom to top.
2. The heating system according to claim 1, characterized in that, The first pressurizing device (20) includes a first pressurizing pump, the second pressurizing device (32) includes a second pressurizing pump, and the third pressurizing device (34) includes a third pressurizing pump.
3. The heating system according to claim 1, characterized in that, The first end of the outlet pipe (40) is connected to the first heating zone (1), the second end of the outlet pipe (40) is the outlet end, the middle of the outlet pipe (40) is provided with a first inlet, the heating system also includes a drainage structure (50), the drainage structure (50) is connected between the third outlet of the second heating zone (2), the fourth outlet of the third heating zone (3) and the first inlet.
4. The heating system according to claim 3, characterized in that, The drainage structure (50) includes a first drainage pipe (51) and a second drainage pipe (52). The first drainage pipe (51) has a second inlet in the middle. The first end of the first drainage pipe (51) is connected to the third outlet of the second heating zone (2). The second end of the first drainage pipe (51) is connected to the first inlet of the outlet pipe (40). The first end of the second drainage pipe (52) is connected to the fourth outlet of the third heating zone (3). The second end of the second drainage pipe (52) is connected to the second inlet of the first drainage pipe (51).
5. The heating system according to claim 4, characterized in that, The drainage structure (50) also includes a first pressure reducing device (53) installed on the first drainage pipe (51), the first pressure reducing device (53) being located downstream of the second water inlet.
6. The heating system according to claim 5, characterized in that, The first pressure reducing device (53) includes a first pressure reducing valve.
7. The heating system according to claim 4, characterized in that, The drainage structure (50) also includes a second pressure reducing device (54) installed on the second drainage pipe (52).
8. The heating system according to claim 7, characterized in that, The second pressure reducing device (54) includes a second pressure reducing valve.
9. The heating system according to any one of claims 3 to 8, characterized in that, The water outlet pipe (40) has a fifth water outlet, the water inlet pipe (10) has a third water inlet located upstream of the first pressurizing device (20), and the heating system further includes a mixing device (60) connected between the third water inlet and the fifth water outlet.
10. The heating system according to claim 9, characterized in that, The fifth outlet is located downstream of the first inlet.