Heating stove and hot water supply system

Abstract

The utility model relates to hot water supply equipment technical field discloses heating stove and hot water supply system. Heating stove includes: casing and the main heat exchanger, plate heat exchanger, condensing heat exchanger, heating water circulating pump, bathroom water inlet pipe, bathroom water outlet pipe and water storage tank arranged in the casing, the smoke inlet of condensing heat exchanger and the smoke outlet of main heat exchanger intercommunication, plate heat exchanger has first heat exchange channel and second heat exchange channel, the water inlet of first heat exchange channel and the water outlet of main heat exchanger intercommunication and the water inlet of first heat exchange channel and the water inlet of main heat exchanger intercommunication to constitute heating water circulation flow path, heating water circulating pump is established on heating water circulation flow path, bathroom water inlet pipe, condensing heat exchanger, second heat exchange channel, bathroom water outlet pipe follow the bathroom water flow direction and form bathroom water flow path in proper order, and water storage tank is arranged on bathroom water flow path and is located the water outlet downstream of condensing heat exchanger. With the help of condensing heat exchanger and water storage tank, can reduce the water temperature fluctuation range when secondary water use.

Description

Technical Field

[0001] This utility model relates to the field of hot water supply equipment technology, and in particular to a heating boiler and hot water supply system. Background Technology

[0002] As people's living standards continue to improve, their requirements for indoor heating comfort are also increasing. People generally use boilers to achieve both heating and bathroom functions. When using the bathroom function, the heat generated by the burner is transferred to the water in the heating circulation circuit through the main heat exchanger. The water in the heating circulation circuit then uses a plate heat exchanger to transfer the heat to the tap water, thus providing users with domestic hot water.

[0003] However, when a user turns on the bathroom faucet again for hot water within a short period (e.g., 30 to 60 seconds), there is a waiting time (e.g., 5 seconds) between the boiler fan starting and the burner igniting. Additionally, the water in the heating circulation circuit, after being heated by the main heat exchanger, also needs time to flow into the plate heat exchanger to heat the bathroom water. Therefore, during this waiting period, the bathroom faucet will first discharge the hot water stored in the plate heat exchanger, followed by a certain amount of cold water, until the boiler reignites. It is evident that users experience alternating hot and cold water flow from the pipes during secondary water use, resulting in significant temperature fluctuations and a poor user experience. Utility Model Content

[0004] This utility model provides a heating furnace that effectively reduces the fluctuation range of bathroom water temperature during secondary water use, thereby improving the user's water experience.

[0005] This invention provides a hot water supply system that effectively reduces the fluctuation range of bathroom water temperature during secondary water use, thereby improving the user's water experience.

[0006] The first technical problem mentioned above is solved by the following technical solution: A heating boiler includes: a shell and a main heat exchanger, a plate heat exchanger, a condensing heat exchanger, a heating water circulation pump, a bathroom inlet pipe, a bathroom outlet pipe, and a water storage tank disposed within the shell; the flue gas inlet of the condensing heat exchanger is connected to the flue gas outlet of the main heat exchanger; the plate heat exchanger has a first heat exchange channel and a second heat exchange channel; the inlet of the first heat exchange channel is connected to the outlet of the main heat exchanger, and the outlet of the first heat exchange channel is connected to the inlet of the main heat exchanger to form a heating water circulation path; the heating water circulation pump is disposed on the heating water circulation path; the bathroom inlet pipe, the condensing heat exchanger, the second heat exchange channel, and the bathroom outlet pipe are sequentially connected along the bathroom water flow direction to form a bathroom water flow path; the water storage tank is connected to the bathroom water flow path and located downstream of the outlet of the condensing heat exchanger.

[0007] Compared with the prior art, the heating boiler described in this utility model has the following advantages: During the user's first use of domestic hot water, the condensing heat exchanger continuously absorbs heat from the flue gas flowing out of the main heat exchanger to heat the bathroom water flowing through it. Subsequently, the heated bathroom water flows through the storage tank and the second heat exchange channel of the plate heat exchanger. When the bathroom water flows into the second heat exchange channel, it exchanges heat with the heating water in the first heat exchange channel of the plate heat exchanger, further increasing its own temperature, thus ensuring that the water temperature meets the user's needs. After the user stops using water, a portion of the hot water can be stored in the condensing heat exchanger, the storage tank, and the connecting pipe between the condensing heat exchanger and the bathroom outlet pipe. Therefore, when a user uses hot water again within a short period of time (e.g., within 30 to 60 seconds), the previously stored hot water will be supplied directly through the bathroom outlet pipe. The water volume and temperature are sufficient to support the heating boiler until it completes its preparation work (i.e., supplying high-temperature heating water to the first heat exchange channel of the plate heat exchanger). While waiting for the water in the heating circulation circuit to be heated by the main heat exchanger before flowing into the first heat exchange channel of the plate heat exchanger, the temperature of the bathroom water output from the bathroom outlet pipe is always higher than the temperature of the cold water in the bathroom inlet pipe. In this way, not only is the amplitude of water temperature fluctuations during the user's second use effectively reduced, but it also prepares for the subsequent connection of relying on continuous heating of heating water to maintain a stable hot water supply, thereby ensuring the user's water experience.

[0008] In one embodiment, the water storage tank is located on the bathroom water flow path between the inlet of the second heat exchange channel and the outlet of the condenser heat exchanger.

[0009] In one embodiment, the heating boiler further includes an internal return water branch, a temperature sensor, a bathroom water circulation pump, a control valve, and a first control unit. The bathroom water circulation pump is located on the bathroom water flow path and upstream of the inlet of the condensing heat exchanger. The two ends of the internal return water branch are respectively connected to the outlet of the water storage tank and the inlet of the bathroom water circulation pump. The control valve is used to open or close the internal return water branch. The temperature sensor is located inside the water storage tank. The first control unit is electrically connected to the temperature sensor, the bathroom water circulation pump, and the control valve.

[0010] In one embodiment, the control valve is a three-way valve, with the first end of the three-way valve connected to the outlet of the water storage tank, the second end of the three-way valve connected to the inlet of the second heat exchange channel, and the third end of the three-way valve connected to the inlet of the bathroom water circulation pump. The second and third ends of the three-way valve can be opened selectively.

[0011] In one embodiment, the outlet of the condenser heat exchanger is connected to the inlet of the water storage tank via a metal pipe.

[0012] In one embodiment, the bathroom water flow path is further provided with an inlet valve assembly, which integrates a water flow sensor and the bathroom water circulation pump. The water flow sensor is configured to collect the water flow rate in the bathroom inlet pipe. The housing is also provided with a burner disposed opposite to the main heat exchanger. The heating furnace also includes a second control unit electrically connected to the ignition feedback needle of the burner and the water flow sensor.

[0013] In one embodiment, the inlet valve assembly also integrates a bathroom water channel connecting the inlet of the second heat exchange channel and the outlet of the condenser heat exchanger.

[0014] In one embodiment, the water storage tank has a water storage capacity of 0.5L to 2L.

[0015] In one embodiment, the water storage tank and the pipes in the bathroom water flow path are covered with insulation cotton, and / or, the tank wall of the water storage tank and the pipe wall in the bathroom water flow path are coated with an insulation coating.

[0016] The second technical problem mentioned above is solved by the following technical solution: A hot water supply system, comprising: The aforementioned heating furnace; The external return water branch is connected in sequence along the direction of bathroom water flow to the bathroom outlet pipe, the bathroom outlet mechanism, the return water valve, and the bathroom inlet pipe.

[0017] Compared with the prior art, the hot water supply system of this utility model has the following advantages: Compared with conventional hot water supply systems, the hot water supply system equipped with the heating boiler of this utility model can recover the waste heat of flue gas through the condensing heat exchanger, reduce energy consumption, and improve overall thermal efficiency; at the same time, when users use water for secondary purposes, the hot water stored in the condensing heat exchanger, the water storage tank, and the connecting pipes between them can maintain a stable outlet water temperature and avoid the phenomenon of water temperature drop due to the heating boiler not being ignited. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a connection diagram of the hot water supply system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a heating stove according to an embodiment of the present utility model; Figure 3 for Figure 2 A schematic diagram of the heating furnace shown from another perspective; Figure 4 for Figure 3 A magnified view of part A in the diagram; Figure 5 for Figure 2 The diagram shows the structure of the inlet valve assembly.

[0020] Explanation of reference numerals in the attached figures: 1. Shell; 2. Main heat exchanger; 3. Plate heat exchanger; 301. First heat exchange channel; 302. Second heat exchange channel; 4. Condensing heat exchanger; 401. Inlet port; 402. Outlet port; 5. Heating water circulation path; 501. Heating water circulation pump; 6. Bathroom water path; 601. Bathroom inlet pipe; 602. Bathroom outlet pipe; 7. Water storage tank; 8. Bathroom water circulation pump; 9. Internal return water branch; 901. Three-way valve; 9011. First end; 9012. Second end; 9013. Third end; 10. Inlet valve assembly; 1001. Water flow sensor; 1002. Bathroom water channel; 11. External return water branch; 1101. Bathroom outlet mechanism; 1102. Return water valve; 12. Burner. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be understood that the terms "upper", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In view of the problem that conventional heating boilers cause poor user experience due to large water temperature fluctuations during secondary water use, the technical problem solved by this utility model is to provide a heating boiler and hot water supply system.

[0026] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0027] According to embodiments of the present invention, such as Figure 1 and Figure 2 As shown, a heating boiler is provided, comprising: a shell 1 and a main heat exchanger 2, a plate heat exchanger 3, a condensing heat exchanger 4, a heating water circulation pump 501, a bathroom water inlet pipe 601, a bathroom water outlet pipe 602, and a water storage tank 7 disposed within the shell 1; the flue gas inlet of the condensing heat exchanger 4 is connected to the flue gas outlet of the main heat exchanger 2; the plate heat exchanger 3 has a first heat exchange channel 301 and a second heat exchange channel 302; the water inlet of the first heat exchange channel 301 is connected to the main heat exchanger 502. The outlet of the main heat exchanger 2 is connected to the outlet of the first heat exchange channel 301 and the inlet of the main heat exchanger 2 to form a heating water circulation path 5. The heating water circulation pump 501 is installed on the heating water circulation path 5. The bathroom inlet pipe 601, the condenser heat exchanger 4, the second heat exchange channel 302, and the bathroom outlet pipe 602 are connected in sequence along the direction of bathroom water flow to form a bathroom water flow path 6. The water storage tank 7 is connected to the bathroom water flow path 6 and is located downstream of the outlet of the condenser heat exchanger 4.

[0028] Compared to the conventional water flow path 6 in a heating boiler, this embodiment of the invention increases the temporary hot water storage capacity of the water flow path 6 by setting a condensing heat exchanger 4 in the water flow path 6 and setting a water storage tank 7 downstream of the outlet of the condensing heat exchanger 4. This ensures that the water outlet mechanism 1101 can continuously output constant temperature water before the heating boiler is restarted, solving the problem of large water temperature fluctuations during secondary water use and improving the user's water experience.

[0029] Specifically, during the user's first use of domestic hot water, the condenser heat exchanger 4 continuously absorbs heat from the flue gas flowing out of the main heat exchanger 2 to heat the bathroom water flowing through it. The heated bathroom water then flows through the storage tank 7 and the second heat exchange channel 302 of the plate heat exchanger 3. After entering the second heat exchange channel 302, the bathroom water in the second heat exchange channel 302 exchanges heat with the heating water in the first heat exchange channel 301 of the plate heat exchanger 3, further increasing its own temperature to ensure the water temperature meets the user's needs. After the user stops using the water, a portion of the hot water can be stored in the condenser heat exchanger 4, the storage tank 7, and the connecting pipe between the condenser heat exchanger 4 and the bathroom outlet. Therefore, when a user uses hot water again within a short period of time (e.g., within 30 to 60 seconds), the previously stored hot water will be supplied directly through the bathroom outlet pipe 602. The water volume and temperature are sufficient to support the heating boiler until it completes its preparation work (i.e., supplying high-temperature heating water to the first heat exchange channel 301 of the plate heat exchanger 3). While waiting for the water in the heating circulation water circuit 5 to be heated by the main heat exchanger 2 before flowing into the first heat exchange channel 301 of the plate heat exchanger 3, the temperature of the bathroom water output from the bathroom outlet pipe 602 is always higher than the temperature of the cold water in the bathroom inlet pipe 601. In this way, not only is the fluctuation of water temperature during the user's second use effectively reduced, but the transition is also made for the subsequent continuous heating of the heating water to maintain a stable hot water supply, thereby ensuring the user's water experience.

[0030] It is understandable that while increasing the length of the bathroom water flow path 6 can increase the hot water storage capacity, compared to installing a water storage tank 7 on the bathroom water flow path 6, this method cannot significantly increase the hot water storage capacity. Furthermore, a longer bathroom water flow path 6 not only increases the difficulty of its layout within the heating boiler shell 1 but also occupies a larger portion of the internal space of the heating boiler shell 1. In addition, a longer bathroom water flow path 6 will increase the flow resistance of the bathroom water, which may lead to a decrease in hot water pressure and a slower water flow.

[0031] It should be noted that, since the secondary water use in this embodiment refers to the user using hot water again in a short period of time, although the heat insulation performance of the pipe in the bathroom water flow path 6 is worse than that of the water storage tank 7, the heat dissipation of the bathroom water in the pipe in the bathroom water flow path 6 is relatively small during the short period of hot water use. Even if the heat dissipation of the bathroom water is high, the water in the water storage tank 7 will transfer heat, thereby maintaining the water temperature balance in the pipe in the bathroom water flow path 6.

[0032] It should be further explained that, in this embodiment, the temperature of the heating water flowing through the first heat exchange channel via the heating water circulation path 5 is higher than the temperature of the bathroom water flowing through the second heat exchange channel via the bathroom water circulation path 6. This allows the bathroom water to be heated, thus providing hot water for domestic use. The reason why the heating water flowing through the first heat exchange channel is at a higher temperature is because the heating water circulation path 5 is equipped with a main heat exchanger 2, and the heating boiler also has a burner 12 positioned opposite to the main heat exchanger 2. Heating water flows inside the main heat exchanger 2, and the heating water can exchange heat with the high-temperature flue gas generated by the main heat exchanger 2 and the burner 12, thereby increasing its own water temperature.

[0033] In addition, this embodiment sets up a condensing heat exchanger 4 in the bathroom water flow path 6 and connects the flue gas inlet of the condensing heat exchanger 4 with the flue gas outlet of the main heat exchanger 2. This can reduce the consumption of gas while ensuring the outlet water temperature, thereby reducing environmental pollution and meeting the environmental protection requirements of energy conservation and emission reduction.

[0034] Specifically, the process of a conventional heating boiler providing domestic hot water is as follows: the high-temperature flue gas generated by the combustion of gas in the burner 12 first heats the heating water in the main heat exchanger 2, and then the heated heating water is transported to the first heat exchange channel 301 of the plate heat exchanger 3 through the heating water circulation path 5; the bathroom water to be heated is transported to the second heat exchange channel 302 through the bathroom water flow path 6. Since the temperature of the heating water in the first heat exchange channel 301 is higher than the temperature of the bathroom water in the second heat exchange channel 302, heat is transferred from the first heat exchange channel 301 to the second heat exchange channel 302 through the metal plates of the plate heat exchanger 3, causing the bathroom water temperature to gradually rise to the set value. However, the heating water first absorbs the residual heat from the flue gas, and energy loss occurs during the heating of the bathroom water in the plate heat exchanger 3, thus reducing the heat exchange efficiency of the bathroom water. Based on this, this embodiment connects the flue gas inlet of the condenser heat exchanger 4 with the flue gas outlet of the main heat exchanger 2, which can preheat the bathroom water before it enters the second heat exchange channel 302, reduce the temperature difference required for subsequent heat exchange with the heating water, reduce the consumption of gas, thereby reducing environmental pollution and meeting the environmental protection requirements of energy conservation and emission reduction.

[0035] Specifically, the condenser heat exchanger 4 includes a condenser heat exchange shell and a condenser heat exchange tube disposed within the condenser heat exchange shell. The flue gas inlet of the condenser heat exchanger 4 is located on the condenser heat exchange shell. The water inlet of the condenser heat exchange tube is connected to the water outlet of the bathroom water inlet pipe 601, and the water outlet of the condenser heat exchange tube is connected to the water inlet of the second heat exchange channel 302. The extension direction of the condenser heat exchange tube is perpendicular to the flue gas flow direction at the flue gas inlet.

[0036] Furthermore, such as Figure 1 and Figure 2As shown, the side wall of the condenser heat exchange shell has a water inlet 401 and a water outlet 402. The water inlet of the condenser heat exchange tube is connected to the water inlet 401, and the water outlet of the condenser heat exchange tube is connected to the water outlet 402. The water inlet 401 and the water outlet 402 are located on the same side wall of the condenser heat exchange shell. It can be understood that by setting the water inlet 401 and the water outlet 402 on the same side of the condenser heat exchange shell in this embodiment, the inconvenience caused by operators operating from both sides can be avoided, and the convenience of early assembly and later maintenance can be improved. The extension direction of the condenser heat exchange tube is perpendicular to the flue gas flow direction, which allows the high-temperature flue gas to pass laterally through the dense heat exchange tubes during the flow process, increasing the contact area and contact time between the flue gas and the condenser heat exchange tubes, so that the sensible heat and latent heat (such as the condensation heat of water vapor) in the flue gas can be more fully transferred to the bath water in the tube.

[0037] In one embodiment, such as Figure 1 and Figure 2 As shown, the water storage tank 7 is located on the bathroom water flow path 6 between the inlet of the second heat exchange channel 302 and the outlet of the condenser heat exchanger 4. Compared to placing the water storage tank 7 between the outlet of the second heat exchange channel 302 and the inlet of the bathroom outlet pipe 602, this embodiment places the water storage tank 7 between the inlet of the second heat exchange channel 302 and the outlet of the condenser heat exchanger 4, which can provide more medium-temperature water and reduce the drop in water temperature. Specifically, the water temperature in the water storage tank 7 is higher than the water temperature in the pipes in the bathroom water flow path 6. That is, the bathroom water in the water storage tank 7 is high-temperature water, the bathroom water in the pipe between the water storage tank 7 and the bathroom outlet pipe 602 and the bathroom water in the bathroom outlet pipe 602 are medium-temperature water, and the bathroom water in the bathroom inlet pipe 601 is cold water. At this time, if the user uses water again, the cold water in the bathroom inlet pipe 601 flows into the storage tank 7, neutralizing the high-temperature water in the storage tank 7 into medium-temperature water. This ensures that the bathroom water flow path 6 can continuously provide warm water at a constant temperature before the burner 12 restarts. However, if the storage tank 7 is located between the outlet of the second heat exchange channel 302 and the inlet of the bathroom outlet pipe 602, the outlet of the storage tank 7 is closer to the outlet of the bathroom outlet pipe 602. Furthermore, the amount of medium-temperature water stored in the pipe between the second heat exchange channel 302 and the condenser heat exchanger 4 is relatively small. Therefore, after the high-temperature water in the storage tank 7 is discharged, the medium-temperature water in the pipe between the second heat exchange channel 302 and the condenser heat exchanger 4 will become low-temperature water under the influence of the cold water. The bathroom water temperature will drop significantly, which may cause water temperature fluctuations and affect the user's water experience.

[0038] In one embodiment, such as Figure 1As shown, the heating boiler also includes an internal return water branch 9, a temperature sensor, a bathroom water circulation pump 8, a control valve, and a first control unit. The bathroom water circulation pump 8 is located on the bathroom water flow path 6 and upstream of the inlet of the condensing heat exchanger 4. The two ends of the internal return water branch 9 are respectively connected to the outlet of the water storage tank 7 and the inlet of the bathroom water circulation pump 8. The control valve is used to open or close the internal return water branch 9. The temperature sensor is located inside the water storage tank 7. The first control unit is electrically connected to the temperature sensor, the bathroom water circulation pump 8, and the control valve.

[0039] It is understandable that the temperature sensor can monitor the water temperature of the insulated water tank 7 in real time. When the water temperature is lower than the preset value, the first control unit can accurately open the control valve and the bathroom water circulation pump 8, so that the bathroom water in the water tank 7 can flow back to the inlet of the bathroom water circulation pump 8 through the internal return water branch 9, and return to the water tank 7 again after being reheated by the condenser heat exchanger 4. This achieves dynamic temperature replenishment of the water in the water tank 7 and avoids secondary water temperature fluctuations caused by the drop in water temperature.

[0040] It should be noted that the heating boiler in this embodiment has a summer mode and a winter mode. In summer mode, the boiler automatically shuts off the circuits related to the indoor heating system (such as radiators and underfloor heating pipes) to avoid ineffective heat output, focusing instead on the preparation and supply of domestic hot water. In winter mode, the boiler automatically activates the circuits related to the indoor heating system (such as radiators and underfloor heating pipes), forming an operating state that balances heating and domestic hot water supply. Specifically, for heating needs, the boiler, based on the set indoor temperature standard, drives the hot water to circulate in the heating circuit through a circulation system, continuously replenishing heat to maintain a stable room temperature. For domestic hot water needs, when user activity is detected (such as turning on a hot water tap), the operating logic quickly switches, prioritizing the immediate production and constant temperature of domestic hot water. After use, it immediately returns to the heating-centric operating rhythm, thus achieving efficient dual protection of heating and domestic hot water supply in winter. Therefore, during winter operation, the heating and domestic hot water supply functions of the boiler do not operate simultaneously, but alternate according to actual usage needs. However, when the boiler is in heating mode, its burner 12 remains running, allowing the condensing heat exchanger 4 to continue absorbing waste heat from the flue gas and transferring it to the sanitary water in the storage tank 7. This not only improves the insulation capacity of the storage tank 7 but also enhances energy efficiency.

[0041] In one embodiment, such as Figure 1As shown, the control valve is a three-way valve 901. The first end 9011 of the three-way valve 901 is connected to the outlet of the water storage tank 7, the second end 9012 of the three-way valve 901 is connected to the inlet of the second heat exchange channel 302, and the third end 9013 of the three-way valve 901 is connected to the inlet of the bathroom water circulation pump 8. The second end 9012 and the third end 9013 of the three-way valve 901 can be opened selectively. Understandably, when the temperature sensor detects that the water temperature in the storage tank 7 meets the standard, the first control unit controls the second end 9012 of the three-way valve 901 to open and the third end 9013 to close, allowing the constant-temperature hot water in the storage tank 7 to be directly delivered to the bathroom outlet pipe 602 through the plate heat exchanger 3, ensuring that the user can quickly obtain stable hot water; when the water temperature in the storage tank 7 is detected to be lower than the preset value, the first control unit immediately switches to the third end 9013 to open and the second end 9012 to close, allowing the low-temperature water in the storage tank 7 to flow back to the bathroom circulation pump through the internal return water branch 9, and then be heated by the condenser heat exchanger 4 before flowing back into the storage tank 7, completing the water temperature replenishment and avoiding a decline in the water experience due to insufficient water temperature.

[0042] In one embodiment, the outlet of the condenser heat exchanger 4 is connected to the inlet of the water storage tank 7 via a metal pipe. Since the metal pipe is thermally conductive, connecting the condenser heat exchanger 4 and the water storage tank 7 via the metal pipe not only allows for water flow between the two but also transfers the heat absorbed by the condenser heat exchanger to the bath water in the water storage tank 7. This improves the overall temperature stability of the hot water in the water storage tank 7 and prevents temperature fluctuations caused by external environmental factors.

[0043] In one embodiment, such as Figures 2 to 5 As shown, the bathroom water flow path 6 is also equipped with an inlet valve assembly 10, which integrates a water flow sensor 1001 and a bathroom water circulation pump 8. The water flow sensor 1001 is configured to collect the water flow rate in the bathroom inlet pipe 601. The housing 1 also houses a burner 12 positioned opposite the main heat exchanger 2. The boiler also includes a second control unit electrically connected to the ignition feedback needle of the burner 12 and the water flow sensor 1001. The second control unit is configured to control the switching of the burner 12 based on the water flow information collected by the water flow sensor 1001. It can be understood that integrating the water flow sensor 1001 and the bathroom water circulation pump 8 into the inlet valve assembly 10 simplifies the overall structure of the bathroom water flow path 6, reduces the installation space and connection nodes of dispersed components, lowers the risk of pipe leakage, and improves system integration and reliability. Secondly, the water flow sensor 1001 can accurately capture the flow changes in the bathroom inlet pipe 601 in real time. When the user turns on the hot water faucet, the flow signal triggers the second control unit to quickly start the burner 12, reducing the waiting time for the burner 12 to restart.

[0044] In one embodiment, such as Figure 3 and Figure 4As shown, the inlet valve assembly 10 also integrates a bathroom water channel 1002 that connects the inlet of the second heat exchange channel 302 to the outlet of the condenser heat exchanger 4. This further simplifies the water circuit layout and reduces the number of pipe interfaces.

[0045] In one embodiment, the water storage tank 7 has a water storage capacity of 0.5L to 2L. It is understood that the outlet of the bathroom water outlet pipe 602 will eventually connect to the bathroom water outlet mechanism 1101. Specifically, taking a showerhead with a flow rate of 5L to 6L / minute as an example, and the burner 12 having a re-ignition waiting time of 6 seconds, it can be calculated that the water output of the showerhead within 6 seconds is approximately 0.5L to 0.6L. Based on this, in this embodiment, the water storage capacity of the water storage tank 7 is set to 0.5L to 2L, which can effectively replenish the warm water output during the waiting period, avoid water temperature fluctuations, and improve the user's water usage experience.

[0046] For example, the water storage capacity of the water storage tank 7 can be, but is not limited to, 0.5L, 0.6L, 0.7L, 0.8L, 0.9L, 1L, 1.1L, 1.2L, 1.3L, 1.4L, 1.5L, 1.6L, 1.7L, 1.8L, 1.9L, 2L or any value range between the two.

[0047] In one embodiment, the pipes in the water storage tank 7 and the bathroom water flow path 6 are covered with insulating cotton, and / or, the tank wall of the water storage tank 7 and the pipe wall in the bathroom water flow path 6 are coated with an insulating coating. It is understood that by providing insulating material on the pipes in the water storage tank 7 and the bathroom water flow path 6, heat loss from the bathroom water can be reduced, allowing the bathroom water to maintain a constant temperature for a short period.

[0048] In one embodiment, the water storage tank 7 is made of stainless steel or engineering plastics that are resistant to water pressure and corrosion.

[0049] According to an embodiment of the present invention, on the other hand, as... Figure 1 As shown, a hot water supply system is provided, including: the aforementioned heating boiler and external return water branch 11.

[0050] Specifically, along the direction of bathroom water flow, the external return water branch 11 is sequentially connected to a bathroom water outlet pipe 602, a bathroom water outlet mechanism 1101, a return water valve 1102, and a bathroom water inlet pipe 601.

[0051] Compared to conventional hot water supply systems, the hot water supply system equipped with the boiler of this embodiment can recover waste heat from flue gas through the condensing heat exchanger 4, reducing energy consumption and improving overall thermal efficiency. Simultaneously, during secondary water use, the hot water stored in the condensing heat exchanger 4, the water storage tank 7, and the connecting pipes between them maintains a stable outlet water temperature, preventing temperature drops due to the boiler not being ignited. Furthermore, when the boiler is in heating operation, the condensing heat exchanger 4 can continue to absorb waste heat from the flue gas and transfer the absorbed heat to the water storage tank 7 and the bathroom water in the external return water branch 11. This not only reduces fluctuations in bathroom water outlet temperature but also improves energy utilization efficiency.

[0052] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0053] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heating stove, characterized in that, include: The shell (1) and the main heat exchanger (2), plate heat exchanger (3), condenser heat exchanger (4), heating water circulation pump (501), bathroom water inlet pipe (601), bathroom water outlet pipe (602) and water storage tank (7) are disposed in the shell (1); the flue gas inlet of the condenser heat exchanger (4) is connected to the flue gas outlet of the main heat exchanger (2); the plate heat exchanger (3) has a first heat exchange channel (301) and a second heat exchange channel (302). The inlet of the first heat exchange channel (301) is connected to the outlet of the main heat exchanger (2), and the outlet of the first heat exchange channel (301) is connected to the inlet of the main heat exchanger (2) to form a heating water circulation path (5). The heating water circulation pump (501) is installed on the heating water circulation path (5). The bathroom inlet pipe (601), the condenser heat exchanger (4), the second heat exchange channel (302), and the bathroom outlet pipe (602) are connected in sequence along the bathroom water flow direction to form a bathroom water flow path (6). The water storage tank (7) is connected to the bathroom water flow path (6) and is located downstream of the outlet of the condenser heat exchanger (4).

2. The heating furnace according to claim 1, characterized in that: The water storage tank (7) is located on the bathroom water flow path (6) between the inlet of the second heat exchange channel (302) and the outlet of the condenser heat exchanger (4).

3. The heating furnace according to claim 2, characterized in that: The heating furnace also includes an internal return water branch (9), a temperature sensor, a bathroom water circulation pump (8), a control valve, and a first control unit. The bathroom water circulation pump (8) is located on the bathroom water flow path (6) and upstream of the inlet of the condensing heat exchanger (4). The two ends of the internal return water branch (9) are respectively connected to the outlet of the water storage tank (7) and the inlet of the bathroom water circulation pump (8). The control valve is used to open or close the internal return water branch (9). The temperature sensor is located inside the water storage tank (7). The first control unit is electrically connected to the temperature sensor, the bathroom water circulation pump (8), and the control valve.

4. The heating furnace according to claim 3, characterized in that: The control valve is a three-way valve (901). The first end (9011) of the three-way valve (901) is connected to the outlet of the water storage tank (7), the second end (9012) of the three-way valve (901) is connected to the inlet of the second heat exchange channel (302), and the third end (9013) of the three-way valve (901) is connected to the inlet of the bathroom water circulation pump (8). The second end (9012) and the third end (9013) of the three-way valve (901) can be opened selectively.

5. The heating furnace according to claim 2, characterized in that: The outlet of the condenser heat exchanger (4) is connected to the inlet of the water storage tank (7) via a metal pipe.

6. The heating furnace according to claim 3, characterized in that: The bathroom water flow path (6) is also provided with an inlet valve assembly (10), which integrates a water flow sensor (1001) and the bathroom water circulation pump (8). The water flow sensor (1001) is configured to collect the water flow rate in the bathroom inlet pipe (601). The housing (1) is also provided with a burner (12) that is opposite to the main heat exchanger (2). The heating furnace also includes a second control unit that is electrically connected to the ignition feedback needle of the burner (12) and the water flow sensor (1001).

7. The heating furnace according to claim 6, characterized in that: The inlet valve assembly (10) also integrates a bathroom water channel (1002) that connects the inlet of the second heat exchange channel (302) to the outlet of the condenser heat exchanger (4).

8. The heating furnace according to any one of claims 1 to 5, characterized in that: The water storage tank (7) has a water storage capacity of 0.5L to 2L.

9. The heating furnace according to any one of claims 1 to 5, characterized in that: The water storage tank (7) and the pipes in the bathroom water flow path (6) are covered with heat insulation cotton, and / or the tank wall of the water storage tank (7) and the pipe wall of the bathroom water flow path (6) are coated with heat insulation coating.

10. A hot water supply system, characterized in that, include: Heating furnace as claimed in any one of claims 1 to 9; The external return water branch (11) is connected in sequence along the direction of bathroom water flow to the bathroom water outlet pipe (602), the bathroom water outlet mechanism (1101), the return water valve (1102) and the bathroom water inlet pipe (601).

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