Anti-freezing heating and water using system

Abstract

The utility model discloses an anti-freezing type heating and water-consuming system, which relates to the field of heating and comprises a main machine, and the main machine comprises a heat exchanger. The domestic water device comprises a domestic water tank, and a secondary heat exchanger is arranged in the domestic water tank; the heat exchanger output pipeline is connected between the water outlet end of the heat exchanger and the input end of the secondary heat exchanger, and a first heat compensation heater is arranged on the heat exchanger output pipeline; the tail end heating device comprises a heating heating pipe; a second heat compensation heater is arranged on the heat exchanger input pipeline; the main machine can supply heat to the domestic water device and the tail end heating device in a long distance, heat is supplemented through the first heat supplementing heater on the output pipeline of the heat exchanger and the second heat supplementing heater on the input pipeline of the heat exchanger on the way, and water is prevented from being too cold or even frozen in the long-distance transmission way.

Description

Technical Field

[0001] This utility model relates to the field of heating, and in particular to an antifreeze heating and water system. Background Technology

[0002] With societal development, people's demands for energy and the environment are correspondingly increasing. Heating systems are needed to improve living conditions and daily water usage in order to enhance quality of life. Because areas requiring heat are widely distributed, and especially since heat sources are often far from where heat is used, integrated heating systems suffer from heat loss during the heat transfer process. Particularly in the frigid climates of northern regions, hot water may even become too cold or freeze during transport, leading to system failure. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a frost-resistant heating and water system.

[0004] According to an embodiment of the present invention, an antifreeze heating and water system includes: a main unit, the main unit including a heat exchanger having a heat exchanger outlet and a heat exchanger inlet; a domestic water device including a domestic water tank, the domestic water tank housing a secondary heat exchanger having a secondary heat exchanger input and a secondary heat exchanger output; a heat exchanger output pipe connected between the heat exchanger outlet and the secondary heat exchanger input, the heat exchanger output pipe being equipped with a first supplementary heater; a terminal heating device including a heating element having a heating element input and a heating element output, the heating element input being connected to the secondary heat exchanger output via a terminal water pipe; and a heat exchanger input pipe connected between the heat exchanger inlet and the heating element output, the heat exchanger input pipe being equipped with a second supplementary heater.

[0005] According to some embodiments of this utility model, the heat exchanger output pipe is further provided with an outlet water sensor and an outlet water ball valve, and the heat exchanger input pipe is further provided with an inlet water sensor and an inlet water ball valve.

[0006] According to some embodiments of the present invention, both the first supplementary heater and the second supplementary heater are silicon nitride heaters. The silicon nitride heater includes a heater housing, which has a heater inlet and a heater outlet. The heater housing has a built-in silicon nitride heating element.

[0007] According to some embodiments of the present invention, the inner cavity of the heater housing is divided into several turbulence chambers by corrugated plates. A silicon nitride heater is placed in each turbulence chamber. Each of the turbulence chambers is connected in series to form a turbulence channel. The two ends of the turbulence channel are respectively connected to the water inlet end of the heater and the water outlet end of the heater.

[0008] According to some embodiments of this utility model, one end of the silicon nitride heater is connected to the inner wall of the heater housing as the heater power terminal, and the other end of the silicon nitride heater extends into the inner cavity of the heater housing as the heater extension end. The inner wall of the heater housing is also provided with a protective ring, which surrounds the heater extension end, and a gap is left between the heater extension end and the inner wall of the protective ring and the inner wall of the heater housing.

[0009] According to some embodiments of the present invention, the domestic water device is equipped with a domestic water temperature sensor, and the terminal heating device is equipped with a terminal heating temperature sensor.

[0010] According to some embodiments of this utility model, the heating pipe includes a plurality of heating branch pipes, each of the heating branch pipes including a heating branch pipe inlet section, a heating coil section, and a heating branch pipe outlet section in sequence. The heating branch pipe inlet section is connected to the input end of the heating pipe, and the heating branch pipe outlet section is connected to the output end of the heating pipe.

[0011] According to some embodiments of this utility model, a water manifold is respectively provided on the input end and the output end of the heating pipe. The water manifold has a water distribution end and a water collection end. The water collection end on the input end of the heating pipe is connected to the end water pipe. The water distribution end on the input end of the heating pipe is connected to the inlet section of the heating branch pipe. The water collection end on the output end of the heating pipe is connected to the input pipe of the heat exchanger. The water distribution end on the output end of the heating pipe is connected to the outlet section of the heating branch pipe.

[0012] According to some embodiments of the present invention, a protective cover is provided on the outside of the water distribution manifold, the inner wall of the protective cover is provided with a heat insulation layer and an antifreeze reflective film, and the protective cover is filled with heat insulation filler.

[0013] According to some embodiments of the present invention, a return water pump is provided on the input pipe of the heat exchanger.

[0014] The antifreeze heating and water system according to the embodiments of this utility model has at least the following technical effects: the main unit can supply heat to domestic water devices and terminal heating devices over a long distance, and supplements the heat through a first supplementary heater on the heat exchanger output pipe and a second supplementary heater on the heat exchanger input pipe, so as to prevent the water from getting too cold or even freezing during long-distance transmission. The first supplementary heater and the second supplementary heater can heat according to the conditions of the heat exchanger output pipe and the heat exchanger input pipe, respectively.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] Additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the silicon nitride heater in this utility model;

[0019] Figure 3 This is a schematic diagram of the water distribution manifold in this utility model.

[0020] Figure label:

[0021] Main unit 100, heat exchanger 110, heat exchanger outlet 111, heat exchanger inlet 112; domestic water device 200, domestic water tank 210, secondary heat exchanger 220, secondary heat exchanger input 221, secondary heat exchanger output 222, domestic water temperature sensor 230; terminal heating device 300, heating element 310, heating element input 311, heating element output 312, heating branch pipe 320, heating branch pipe inlet section 321, heating coil section 322, heating branch pipe outlet section 323, terminal heating temperature sensor 330, manifold 340, water distribution end 341, water collection end 3 42. Protective cover 350, insulation layer 351, antifreeze reflective film 352; heat exchanger output pipe 400, water outlet sensor 410, water outlet ball valve 420; heat exchanger input pipe 500, water inlet sensor 510, water inlet ball valve 520, return water pump 530; silicon nitride heater 600, first supplementary heater 601, second supplementary heater 602, heater housing 610, heater inlet end 611, heater outlet end 612, silicon nitride heater 620, heater power connection end 621, heater extension end 622, corrugated plate 630, turbulence channel 640, turbulence chamber 641, protective ring 660; terminal water pipe 700. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," "exceeding," etc., are understood to exclude the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] The following is for reference. Figure 1 and Figure 2 This invention describes an antifreeze heating and water supply system according to an embodiment of the present invention.

[0027] like Figure 1 and Figure 2 As shown, the antifreeze heating and water system according to an embodiment of the present utility model includes a main unit 100, a domestic water device 200, a terminal heating device 300, a heat exchanger output pipe 400, and a heat exchanger input pipe 500.

[0028] The main unit 100 includes a heat exchanger 110, which has a heat exchanger outlet 111 and a heat exchanger inlet 112; the domestic water supply unit 200 includes a domestic water tank 210, which houses a secondary heat exchanger 220, which has a secondary heat exchanger inlet 221 and a secondary heat exchanger outlet 222; a heat exchanger outlet pipe 400 connects the heat exchanger outlet 111 and the secondary heat exchanger inlet 221. A first supplementary heater 601 is provided on the 0; the terminal heating device 300 includes a heating tube 310, which has a heating tube input end 311 and a heating tube output end 312. The heating tube input end 311 and the secondary heat exchanger output end 222 are connected by a terminal water pipe 700; the heat exchanger input pipe 500 is connected between the heat exchanger inlet end 112 and the heating tube output end 312, and a second supplementary heater 602 is provided on the heat exchanger input pipe 500.

[0029] For example, such as Figure 1 and Figure 2 As shown, the main unit 100 includes a heat exchanger 110, which collects heat energy from a heat source for heating. The heat exchanger 110 has a heat exchanger outlet 111 and a heat exchanger inlet 112. The domestic water supply device 200 includes a domestic water tank 210, whose water can be used for cleaning, bathing, drinking, etc. The domestic water tank 210 has a built-in secondary heat exchanger 220 for heating the water in the domestic water tank 210. The secondary heat exchanger 220 has a secondary heat exchanger inlet 221 and a secondary heat exchanger outlet 222. The heat exchanger outlet pipe 400 connects the heat exchanger outlet 111 and the secondary heat exchanger inlet 221, enabling the heat exchanger 110 to supply heat to the secondary heat exchanger 220. A first supplementary heater 601 is installed on the heat exchanger output pipe 400 to supplement the heat supply channel from the heat exchanger 110 to the secondary heat exchanger 220.

[0030] The terminal heating device 300 includes a heating element 310 for heating the interior of the building. The heating element 310 has an input end 311 and an output end 312. The input end 311 of the heating element on the terminal heating device 300 is connected to the output end 222 of the secondary heat exchanger via a terminal water pipe 700, which is equivalent to connecting the input end 311 of the heating element on the terminal heating device 300 in series with the output end 222 of the secondary heat exchanger on the domestic water device 200. The heat exchanger input pipe 500 is connected between the heat exchanger inlet end 112 and the heating element output end 312, which means that water used by the terminal heating device 300 can flow back into the heat exchanger 110 through the heat exchanger input pipe 500. A second supplementary heater 602 is provided on the heat exchanger input pipe 500 to supplement the heat in the channel flowing back into the heat exchanger 110.

[0031] In actual operation, the main unit 100 is located at the heat source, especially for clean energy sources such as solar and geothermal energy, where the location is often far from the domestic water supply unit 200 and the terminal heating unit 300. The main unit 100 absorbs heat energy from the heat source through the heat exchanger 110. The hot water produced by the heat exchanger 110 first enters the domestic water tank 210 through the heat exchanger output pipe 400, where it is heated by heat exchange in the secondary heat exchanger 220, and then enters the terminal heating unit 300 through the terminal water pipe 700, where the heat is dissipated through the heating element 310 for heating. After the water cools down, it flows back into the heat exchanger 110 through the heat exchanger input pipe 500 for reheating.

[0032] In the above process, the water is reheated by the first supplementary heater 601 on the heat exchanger output pipe 400 and the second supplementary heater 602 on the heat exchanger input pipe 500, so as to prevent the water from becoming too cold or even freezing during long-distance transmission.

[0033] Since the water temperatures in the heat exchanger output pipe 400 and the heat exchanger input pipe 500 are usually different, the first supplementary heater 601 and the second supplementary heater 602 can be activated separately as needed. Whether the temperature difference between the inlet and outlet water of the heat exchanger 110 is small or large, the first supplementary heater 601 and the second supplementary heater 602 can be flexibly activated as needed. For example, if the water temperature in the heat exchanger input pipe 500 is much lower than that in the heat exchanger output pipe 400, the second supplementary heater 602 can be activated to raise the water temperature in the heat exchanger input pipe 500, thus preventing the backflow of overly cold water into the heat exchanger 110 from affecting its operation.

[0034] In some embodiments of this utility model, reference is made to Figure 1The heat exchanger output pipe 400 is also equipped with an outlet water sensor 410 and an outlet ball valve 420, while the heat exchanger input pipe 500 is equipped with an inlet water sensor 510 and an inlet ball valve 520. The outlet water sensor 410 and the outlet ball valve 420 work together to detect the temperature within the heat exchanger output pipe 400, providing real-time monitoring of the water temperature. If the temperature within the heat exchanger output pipe 400 is too low, the first supplementary heater 601 is activated for heating, and the outlet ball valve 420 adjusts the water flow accordingly. Similarly, the inlet water sensor 510 monitors the water temperature within the heat exchanger input pipe 500. If the temperature within the heat exchanger input pipe 500 is too low, the second supplementary heater 602 is activated for heating, and the inlet ball valve 520 adjusts the water flow accordingly. If the required temperature can be achieved using only the main unit 100, the water from the main unit 100 can be directly used for heating circulation by controlling the outlet ball valve 420 and the inlet ball valve 520.

[0035] In some embodiments of this utility model, reference is made to Figure 1 , Figure 2 Both the first supplementary heater 601 and the second supplementary heater 602 employ silicon nitride heaters 600. Each silicon nitride heater 600 includes a heater housing 610, which has a water inlet 611 and a water outlet 612. A silicon nitride heater 620 is built into the heater housing 610. Water enters through the water inlet 611 and exits from the silicon nitride heater 600 through the water outlet 612, where it is heated by the silicon nitride heater 620. The silicon nitride heater 620 has high heat exchange efficiency, and the silicon nitride ceramic material used in the heater possesses high thermal conductivity, high thermal stability, excellent mechanical properties, and oxidation resistance, making it suitable for the operating environment of both the first and second supplementary heaters 601 and 602.

[0036] In some embodiments of this utility model, reference is made to Figure 2 The heater housing 610 has several turbulence chambers 641 divided into its inner cavity by a corrugated plate 630. Each turbulence chamber 641 houses a silicon nitride heater 620. These chambers are connected in series to form a turbulence channel 640, with both ends connected to the heater inlet 611 and the heater outlet 612, respectively. The corrugated plate 630 design, in addition to extending the path length of the turbulence chambers 641 and the turbulence channel 640, also reduces the flow velocity and increases the contact time between the water and the silicon nitride heater 620, thereby improving the heating effect.

[0037] In a further embodiment of this utility model, the silicon nitride heater 620 is a heating tube structure. The silicon nitride heater 620 extends along the direction of the turbulence chamber 641 to ensure that the silicon nitride heater 620 itself will neither block the water flow nor hit the corrugated plate 630.

[0038] In some embodiments of this utility model, one end of the silicon nitride heater 620 serves as the heater terminal 621, connected to the inner wall of the heater housing 610. The other end of the silicon nitride heater 620 extends into the inner cavity of the heater housing 610 as the heater extension end 622. A protective ring 660 is also provided on the inner wall of the heater housing 610, surrounding the heater extension end 622, with a gap between the heater extension end 622, the inner wall of the protective ring 660, and the inner wall of the heater housing 610. The silicon nitride heater 620 is made of a relatively fragile material, and the silicon nitride heater 600 is prone to significant thermal expansion and contraction when operating in cold environments. The protective ring 660 provides auxiliary protection for the silicon nitride heater 620, while the gap between the heater extension end 622, the inner wall of the protective ring 660, and the inner wall of the heater housing 610 accommodates deformation during thermal expansion and contraction, preventing the silicon nitride heater 620 from being crushed. Even if the silicon nitride heater 620 is impacted by the heater housing 610 and hits the protective ring 660, the silicon nitride heater 620 is not easy to break because the gap between the heater extension end 622 and the inner wall of the protective ring 660 is relatively small.

[0039] In a further embodiment of this utility model, the protective ring 660 can be provided only for areas of the heater housing 610 that are prone to deformation. For example, the protective ring 660 can be provided on the inner wall at the middle position of the heater housing 610. That is, the protective ring 660 does not need to be provided at all positions of the silicon nitride heaters 620, or it can be provided at all positions of the silicon nitride heaters 620.

[0040] In some embodiments of this utility model, reference is made to Figure 1 A domestic water temperature sensor 230 is installed on the domestic water device 200 to monitor the water temperature of the domestic water device 200, and a terminal heating temperature sensor 330 is installed on the terminal heating device 300 to monitor the heating temperature.

[0041] In some specific embodiments of this utility model, the secondary heat exchanger 220 includes a coil structure located inside the domestic water tank 210 for heating domestic water. The coil structure exchanges heat with the heating medium in the domestic water tank 210, thereby achieving the purpose of heating domestic water.

[0042] In some specific embodiments of this utility model, the outlet of the domestic water tank 210 is connected to domestic water equipment, such as a shower head or a kitchen faucet.

[0043] In some embodiments of this utility model, reference is made to Figure 1 , Figure 3The heating element 310 includes several heating branch pipes 320. Each heating branch pipe 320 includes, in sequence, a heating branch pipe inlet section 321, a heating coil section 322, and a heating branch pipe outlet section 323. The heating branch pipe inlet section 321 is connected to the heating element input end 311, and the heating branch pipe outlet section 323 is connected to the heating element output end 312. The heating element 310 is divided into several heating branch pipes 320, which can provide heating to a wider area, while the design of the heating coil section 322 can improve heating efficiency.

[0044] In some embodiments of this utility model, a water manifold 340 is respectively provided on the heating pipe input end 311 and the heating pipe output end 312. The water manifold 340 has a water distribution end 341 and a water collection end 342. The water collection end 342 on the heating pipe input end 311 is connected to the terminal water pipe 700, the water distribution end 341 on the heating pipe input end 311 is connected to the heating branch pipe inlet section 321, the water collection end 342 on the heating pipe output end 312 is connected to the heat exchanger input pipe 500, and the water distribution end 341 on the heating pipe output end 312 is connected to the heating branch pipe outlet section 323. The water manifold 340 is used to collect water passing through the water distribution end 341 through the water collection end 342, or to disperse water passing through the water collection end 342 through the water distribution end 341. The manifold 340 is responsible for distributing the water from the heating pipe 310 to each heating branch pipe 320, and then re-collecting the water from each heating branch pipe 320 to form a circulation.

[0045] In some embodiments of this utility model, reference is made to Figure 3 The manifold 340 is equipped with a protective cover 350. The inner wall of the protective cover 350 is provided with an insulation layer 351 and an antifreeze reflective film 352, and the protective cover 350 is filled with insulation filler. The water passing through the manifold 340 is generally hotter than the outside temperature. The insulation layer 351 and the insulation filler in the protective cover 350 work together to form an insulation effect, which can reduce the heat loss of the manifold 340, and the heat of the manifold 340 is reflected back through the antifreeze reflective film 352.

[0046] In some embodiments of this utility model, reference is made to Figure 1 A return water pump 530 is installed on the heat exchanger inlet pipe 500 to ensure that the return water from the heat exchanger inlet pipe 500 has sufficient power to return to the main unit 100.

[0047] The system according to the present utility model, by adopting the above-mentioned antifreeze heating and water system, reduces the technical problems caused by the system in the long-distance transmission process, facilitates the flexible layout design of the system, and can improve the working stability of the system and enhance the user experience.

[0048] Other configurations and operations of the system according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0049] The following is for reference. Figure 1 and Figure 2 The following describes in detail an antifreeze heating and water system according to an embodiment of the present invention, using a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0050] like Figure 1 and Figure 2 As shown, the antifreeze heating and water system of this utility model embodiment includes a main unit 100, a domestic water device 200, a terminal heating device 300, a heat exchanger output pipe 400, a heat exchanger input pipe 500, and a terminal water pipe 700.

[0051] The main unit 100 is a solar energy + gas boiler combined heating device. Under normal circumstances, it mainly uses solar energy for heating. When solar energy cannot meet the requirements, it uses a gas boiler for heating, thus meeting the heating requirements while achieving energy conservation and consumption reduction. The main unit 100 includes a heat exchanger 110, a heat exchanger outlet 111, and a heat exchanger inlet 112.

[0052] The domestic water supply device 200 includes a domestic water tank 210, a secondary heat exchanger 220, and a domestic water temperature sensor 230. The secondary heat exchanger 220 includes a secondary heat exchanger input end 221 and a secondary heat exchanger output end 222.

[0053] The system comprises a terminal heating device 300, heating element 310, heating branch pipe 320, terminal heating temperature sensor 330, manifold 340, and protective cover 350. The heating element 310 includes an input end 311 and an output end 312. The heating branch pipe 320 includes an inlet section 321, a coil section 322, and an outlet section 323. The manifold 340 includes a distribution end 341 and a collection end 342. The protective cover 350 includes an insulation layer 351 and an anti-freeze reflective film 352.

[0054] The heat exchanger output pipe 400 connects the main unit 100 and the domestic water device 200. The heat exchanger output pipe 400 includes an outlet water sensor 410, an outlet ball valve 420, and a first supplementary heater 601. The heat exchanger input pipe 500 connects the main unit 100 and the terminal heating device 300. The heat exchanger input pipe 500 includes an inlet water sensor 510, an inlet ball valve 520, a return water pump 530, and a second supplementary heater 602. The terminal water pipe 700 connects the domestic water device 200 and the terminal heating device 300.

[0055] The first supplementary heater 601 and the second supplementary heater 602 are silicon nitride heaters 600. The silicon nitride heater 600 includes a heater housing 610, a silicon nitride heater 620, a corrugated plate 630, a flow-dispersing channel 640, and a protective ring 660. The heater housing 610 includes a heater inlet 611 and a heater outlet 612. The silicon nitride heater 620 includes a heater power connection 621 and a heater extension end 622. The flow-dispersing channel 640 is formed by connecting flow-dispersing chambers 641 in series.

[0056] According to the antifreeze heating and water system of this utility model embodiment, by setting it up in this way, at least the following effects can be achieved: the main unit 100 can supply heat to the domestic water device 200 and the terminal heating device 300 over a long distance. During the journey, the water is supplemented by a first supplementary heater 601 on the heat exchanger output pipe 400 and a second supplementary heater 602 on the heat exchanger input pipe 500, so as to prevent the water from getting too cold or even freezing during long-distance transmission. The first supplementary heater 601 and the second supplementary heater 602 can heat according to the conditions of the heat exchanger output pipe 400 and the heat exchanger input pipe 500, respectively.

[0057] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A frost-resistant heating and water supply system, characterized in that, include: The host (100) includes a heat exchanger (110) having a heat exchanger outlet (111) and a heat exchanger inlet (112). A domestic water supply device (200) includes a domestic water tank (210), which has a built-in secondary heat exchanger (220) and a secondary heat exchanger input end (221) and a secondary heat exchanger output end (222). A heat exchanger output pipe (400) is connected between the heat exchanger outlet (111) and the secondary heat exchanger input (221), and a first supplementary heater (601) is provided on the heat exchanger output pipe (400). A terminal heating device (300) includes a heating element (310), which has an input end (311) and an output end (312). The input end (311) and the output end (222) of the secondary heat exchanger are connected by a terminal water pipe (700). A heat exchanger input pipe (500) is connected between the heat exchanger inlet end (112) and the heating pipe output end (312), and a second supplementary heater (602) is provided on the heat exchanger input pipe (500).

2. The antifreeze heating and water supply system according to claim 1, characterized in that, The heat exchanger output pipe (400) is also equipped with an outlet water sensor (410) and an outlet water ball valve (420), and the heat exchanger input pipe (500) is also equipped with an inlet water sensor (510) and an inlet water ball valve (520).

3. The antifreeze heating and water supply system according to claim 1, characterized in that, Both the first supplementary heater (601) and the second supplementary heater (602) are silicon nitride heaters (600). The silicon nitride heater (600) includes a heater housing (610), which has a heater inlet (611) and a heater outlet (612). The heater housing (610) has a silicon nitride heater (620) built inside.

4. The antifreeze heating and water supply system according to claim 3, characterized in that, The inner cavity of the heater housing (610) is divided into several turbulence chambers (641) by a corrugated plate (630). Each turbulence chamber (641) contains a silicon nitride heater (620). Each turbulence chamber (641) is connected in series to form a turbulence channel (640). The two ends of the turbulence channel (640) are respectively connected to the water inlet (611) and the water outlet (612) of the heater.

5. The antifreeze heating and water supply system according to claim 3 or 4, characterized in that, One end of the silicon nitride heater (620) is connected to the inner wall of the heater housing (610) as the heater power terminal (621). The other end of the silicon nitride heater (620) extends into the inner cavity of the heater housing (610) as the heater extension end (622). The inner wall of the heater housing (610) is also provided with a protective ring (660). The protective ring (660) surrounds the heater extension end (622), and there is a gap between the heater extension end (622) and the inner wall of the protective ring (660) and the inner wall of the heater housing (610).

6. The antifreeze heating and water supply system according to claim 1, characterized in that, The domestic water device (200) is equipped with a domestic water temperature sensor (230), and the terminal heating device (300) is equipped with a terminal heating temperature sensor (330).

7. The antifreeze heating and water supply system according to claim 1, characterized in that, The heating pipe (310) includes several heating branch pipes (320), each of which includes a heating branch pipe inlet section (321), a heating coil section (322), and a heating branch pipe outlet section (323). The heating branch pipe inlet section (321) is connected to the heating pipe input end (311), and the heating branch pipe outlet section (323) is connected to the heating pipe output end (312).

8. The antifreeze heating and water supply system according to claim 7, characterized in that, A manifold (340) is provided on the heating pipe input end (311) and the heating pipe output end (312). The manifold (340) has a water distribution end (341) and a water collection end (342). The water collection end (342) on the heating pipe input end (311) is connected to the terminal water pipe (700). The water distribution end (341) on the heating pipe input end (311) is connected to the heating pipe inlet section (321). The water collection end (342) on the heating pipe output end (312) is connected to the heat exchanger input pipe (500). The water distribution end (341) on the heating pipe output end (312) is connected to the heating pipe outlet section (323).

9. The antifreeze heating and water supply system according to claim 8, characterized in that, The water distribution manifold (340) is provided with a protective cover (350), the inner wall of the protective cover (350) is provided with a heat insulation layer (351) and an antifreeze reflective film (352), and the protective cover (350) is filled with heat insulation filler.

10. The antifreeze heating and water supply system according to claim 1, characterized in that, A return water pump (530) is installed on the heat exchanger input pipe (500).

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