Double-heat-source hot water sterilization system

Abstract

The utility model relates to the technical field of hot water system sterilization, and provides a double-heat-source hot water sterilization system which comprises heat sources, a water storage tank, a water supply pipeline and a water return pipeline. The heat source comprises an air energy heat pump and a water heater system which are arranged in parallel; the water supply pipeline is used for supplying hot water to the domestic water tail end, the water supply pipeline comprises a first water supply pipeline section and a second water supply pipeline section, and water heated by the heat source flows into the water storage tank through the first water supply pipeline section and is supplied to the domestic water tail end by the water storage tank through the second water supply pipeline section; the water return pipeline is used for enabling a part of water in the water storage tank and the water supply pipeline to flow back to the air energy heat pump to be heated and sterilized, and enabling the other part of water in the water storage tank and the water supply pipeline to flow back to the water heater system to be heated and sterilized. According to the embodiment of the invention, the heating sterilization efficiency of the hot water system can be improved.

Description

Technical Field

[0001] The present specification relates to the technical field of hot water system sterilization, and in particular to a dual-heat source hot water sterilization system. Background Art

[0002] Hot water systems are prone to breed a large number of bacteria when they are in a medium or low temperature environment for a long time, so the hot water system needs to be sterilized. In the current technical solutions for heating and sterilizing hot water systems, heating and sterilization need to last for a relatively long time to achieve the expected technical effect, and the sterilization efficiency is low. Utility Model Content

[0003] The purpose of the embodiments of this specification is to provide a dual-heat source hot water sterilization system to improve the heating and sterilization efficiency of the hot water system.

[0004] To achieve the above-mentioned purpose, on the one hand, the embodiment of this specification provides a dual-heat source hot water sterilization system, the dual-heat source hot water sterilization system includes a heat source, a water storage tank, a water supply pipeline and a return water pipeline;

[0005] The heat source includes an air energy heat pump and a water heater system arranged in parallel;

[0006] The water supply pipeline is used to supply hot water to the domestic water terminal. The water supply pipeline includes a first water supply pipeline section and a second water supply pipeline section. The water heated by the heat source can flow into the water storage tank through the first water supply pipeline section, and is supplied from the water storage tank to the domestic water terminal through the second water supply pipeline section.

[0007] The return water pipeline is used to return a portion of the water in the water tank and the water supply pipeline to the air energy heat pump for heating and sterilization, and to return another portion of the water in the water tank and the water supply pipeline to the water heater system for heating and sterilization.

[0008] In some embodiments of this specification, the water return pipeline includes a first water return pipeline section and a second water return pipeline section;

[0009] One end of the first water return pipe section is connected to the second water supply pipe section, and the other end of the first water return pipe section is connected to the water storage tank, so as to return the water in the second water supply pipe section to the water storage tank;

[0010] One end of the second water return pipe section is connected to the water storage tank, and the other end of the second water return pipe section is connected to the heat source, which is used to return the water in the water supply pipeline and the water storage tank to the heat source for heating and sterilization.

[0011] In some embodiments of this specification, the dual heat source hot water sterilization system includes a first water pump and a second water pump;

[0012] The first water pump is disposed on the first water supply pipe section or the second water return pipe section, and is used to circulate the water in the water storage tank to the heat source;

[0013] The second water pump is arranged on the second water supply pipe section or the first water return pipe section, and is used for circulating the water in the second water supply pipe section to the water storage tank;

[0014] The water circulated into the water storage tank by the second water pump can be circulated to the heat source through the first water pump for heating and sterilization.

[0015] In some embodiments of the present specification, the water storage tank is provided with a first temperature sensor, and the first temperature sensor is used to detect the water temperature of the water in the water storage tank;

[0016] The first water return pipe section is provided with a second temperature sensor, and the second temperature sensor is used to detect the water temperature of the water in the first water return pipe section.

[0017] In some embodiments of the present specification, the water storage tank has a first water inlet, a first water outlet, a second water inlet, and a second water outlet.

[0018] The first water inlet is connected to the first water supply pipe section, the first water outlet is connected to the second water supply pipe section, the second water inlet is connected to the first water return pipe section, and the second water outlet is connected to the second water return pipe section.

[0019] In some embodiments of this specification, the water heater system includes a water heater and a plate heat exchanger.

[0020] The plate exchanger includes a first flow channel and a second flow channel isolated from each other.

[0021] The high-temperature water generated by the water heater can flow into the first flow channel,

[0022] A portion of the water in the water storage tank and the water supply pipeline can flow back to the second flow channel and perform heat exchange with the high-temperature water generated by the water heater.

[0023] In some embodiments of the present specification, a diverter valve is also provided on the return water pipeline. When the diverter valve is in a first state, a portion of the water in the water tank and the water supply pipeline flows back to the air energy heat pump for heating and sterilization, and another portion of the water in the water tank and the water supply pipeline flows back to the hot water boiler system for heating and sterilization.

[0024] In some embodiments of the present specification, when the diverter valve is in the second state, the water in the water storage tank and the water supply pipeline flows back to the air energy heat pump or the water heater system for heating and sterilization.

[0025] In some embodiments of this specification, the dual heat source hot water sterilization system has a controller, and the controller is communicatively connected with both the air energy heat pump and the hot water boiler system;

[0026] The controller is provided with a display screen,

[0027] The display screen is provided with a touch portion for triggering heating sterilization. When the touch portion is triggered, a portion of the water in the water storage tank and the water supply pipeline can flow back to the air energy heat pump for heating sterilization, and another portion of the water in the water storage tank and the water supply pipeline can flow back to the hot water boiler system for heating sterilization.

[0028] In some embodiments of the present specification, the controller has a shell, the shell has a frame and a front panel; a display screen is arranged on the front panel; a protective cover for protecting the display screen is arranged on the front panel; one side of the protective cover is hinged to one side of the front panel, and the other side of the protective cover is magnetically connected to the other side of the front panel; at least a portion of the material of the protective cover is a light-transmitting material.

[0029] It can be seen from the technical solutions provided in the above embodiments of this specification that the dual-heat source hot water sterilization system in the embodiments of this specification can perform dual-heat source parallel heating and sterilization, so that the water in the water supply pipeline and the return pipeline can flow back to the dual heat sources in a short time for rapid heating, thereby achieving large flow and rapid sterilization, and greatly improving the heating and sterilization efficiency of the hot water system; moreover, due to the high sterilization efficiency and the short sterilization time, it also reduces or avoids the problem of the normal supply of domestic hot water affected by the sterilization operation, and can also effectively avoid the problem of overheating of the outlet water caused by the short interval between domestic water use and sterilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art description. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0031] Figure 1 This is a structural block diagram of a dual-heat-source hot water sterilization system in some embodiments of this specification;

[0032] Figure 2 It is a structural block diagram of a dual-heat-source hot water sterilization system in other embodiments of this specification;

[0033] Figure 3A schematic diagram showing the heating sterilization control principle of a controller of a dual-heat-source hot water sterilization system in some embodiments of this specification is shown;

[0034] Figure 4 This is a schematic diagram of the structure of the controller of the dual-heat-source hot water sterilization system in some embodiments of this specification with the protective cover opened;

[0035] Figure 5 This is a schematic diagram of the structure of the controller of the dual-heat-source hot water sterilization system in some embodiments of this specification when the front panel is open.

[0036] [Description of Reference Numerals]

[0037] 1. Hot water boiler system;

[0038] 11. Water heater;

[0039] 12. Plate replacement;

[0040] 121, first flow channel;

[0041] 122, second flow channel;

[0042] 2. Air energy heat pump;

[0043] 3. Water supply pipeline;

[0044] 31. The first water supply pipe section;

[0045] 32. Second water supply pipe section;

[0046] 4. Return pipe;

[0047] 41. The first water return pipe section;

[0048] 42. The second water return pipe section;

[0049] 5. Domestic water terminal;

[0050] 6. Water storage tank;

[0051] 61. First water inlet;

[0052] 62. First water outlet;

[0053] 63. Second water inlet;

[0054] 64. Second water outlet;

[0055] 7. Diverter valve;

[0056] 81. First water pump;

[0057] 82. Second water pump;

[0058] 83. The third water pump;

[0059] 91. A first temperature sensor;

[0060] 92. A second temperature sensor;

[0061] 10. Controller;

[0062] 100. Shell;

[0063] 101. Framework;

[0064] 102, front panel;

[0065] 103. Display screen;

[0066] 104. Protective cover. DETAILED DESCRIPTION

[0067] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification. For example, in the following description, forming a second component above a first component may include an embodiment in which the first component and the second component are formed in direct contact, and may also include an embodiment in which the first component and the second component are formed in non-direct contact (that is, additional components may be included between the first component and the second component), etc.

[0068] Moreover, for ease of description, some embodiments of this specification may use spatially relative terms such as "above", "below", "top", "below", etc. to describe the relationship between one element or component and another (or other) elements or components as shown in the drawings of the embodiments. It should be understood that in addition to the orientations described in the drawings, the spatially relative terms are also intended to include different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the elements or components described as "below" or "beneath" other elements or components will then be positioned "above" or "on" the other elements or components.

[0069] The embodiments of this specification relate to heating and sterilization technology for hot water systems. The hot water system may be a hot water system that provides hot water for life services (such as drinking, bathing, swimming pools, etc.); for example, a commercial central hot water system and a domestic central hot water system. However, according to the actual application scenario, the hot water system may also be a hot water system that provides hot water for production (such as breeding, food or beverage processing, etc.), and the embodiments of this specification do not limit this.

[0070] It should be pointed out that the bacteria in the embodiments of this specification is a broad concept, which not only includes bacteria (such as Legionella pneumophila, Escherichia coli, Klebsiella, Pseudomonas aeruginosa, Salmonella typhi, mycobacteria, etc.), but also includes viruses (such as enterovirus, hepatitis virus, rotavirus, etc.) and other microorganisms and parasites, as long as they can be killed by heating.

[0071] Figure 1 Schematic diagram of a dual-heat-source hot water sterilization system in some embodiments of the specification is shown in FIG. The dual-heat-source hot water sterilization system includes a heat source, a water supply pipeline 3, a return water pipeline 4 and a water storage tank 6; wherein the heat source includes a water heater system 1 and an air energy heat pump 2 arranged in parallel. The water supply pipeline 3 is used to supply hot water to the domestic water terminal 5, and the water supply pipeline 3 includes a first water supply pipeline section 31 and a second water supply pipeline section 32. The water heated by the heat source can flow into the water storage tank 6 through the first water supply pipeline section 31, and is supplied to the domestic water terminal 5 by the water storage tank 6 through the second water supply pipeline section 32; the return water pipeline 4 is used to return a part of the water in the water storage tank 6 and the water supply pipeline 3 to the air energy heat pump 2 for heating and sterilization, and return another part of the water in the water storage tank 6 and the water supply pipeline 3 to the water heater system 1 for heating and sterilization.

[0072] Compared with the single-heat source heating sterilization of the traditional hot water system, the dual-heat source hot water sterilization system of the embodiment of this specification can perform dual-heat source parallel heating sterilization, so that the water in the water supply pipe 3 and the return pipe 4 can flow back to the dual heat sources in a short time for rapid heating, thereby achieving large flow and rapid sterilization, and greatly improving the heating sterilization efficiency of the hot water system; moreover, due to the high sterilization efficiency and the short sterilization time, it also reduces or avoids the problem of the normal supply of domestic hot water affected by the sterilization operation, and can also effectively avoid the problem of overheating of the outlet water caused by the short interval between domestic water use and sterilization.

[0073] Please continue to refer to Figure 1 As shown, in some embodiments of the present specification, the return water pipe 4 may include a first return water pipe section 41 and a second return water pipe section 42; one end of the first return water pipe section 41 is connected to the second water supply pipe section 32, and the other end of the first return water pipe section 41 is connected to the water storage tank 6, for returning the water in the second water supply pipe section 32 to the water storage tank 6; one end of the second return water pipe section 42 is connected to the water storage tank 6, and the other end of the second return water pipe section 42 is respectively connected to the water heater system 1 and the air energy heat pump 2, for returning the water in the water supply pipe 3 and the water storage tank 6 to the water heater system 1 and the air energy heat pump 2 for heating and sterilization.

[0074] refer to Figure 2 As shown, the water tank 6 has a first water inlet 61, a first water outlet 62, a second water inlet 63 and a second water outlet 64, the first water inlet 61 is connected to the first water supply pipe section 31, the first water outlet 62 is connected to the second water supply pipe section 32, the second water inlet 63 is connected to the first return water pipe section 41, and the second water outlet 64 is connected to the second return water pipe section 42.

[0075] Combination Figure 2 As shown, in some embodiments of the present specification, the water heater system 1 includes a water heater 11 and a plate heat exchanger 12; the plate heat exchanger 12 includes a first flow channel 121 and a second flow channel 122 isolated from each other; the water inlet of the first flow channel 121 is connected to the water outlet of the water heater 11; the water outlet of the first flow channel 121 is connected to the water return port of the water heater 11; the high-temperature water generated by the water heater 11 can flow into the first flow channel 121; the water inlet of the second flow channel 122 is connected to the water return pipe 4 The water outlet of the second flow channel 122 is connected to the water supply pipeline 3; a portion of the water in the water storage tank 6 and the water supply pipeline 3 can flow back to the second flow channel 122 and perform heat exchange with the high-temperature water generated by the water heater 11 and flowing into the first flow channel 121, thereby achieving heating and sterilization of a portion of the water in the water storage tank 6 and the water supply pipeline 3 by the water heater system 1, and meeting the different requirements of the water heater 11 and the air energy heat pump 2 for different parameters such as water quality and water pressure.

[0076] refer to Figure 3 As shown, in some embodiments of the present specification, the dual heat source hot water sterilization system is provided with a controller 10, and the controller 10 is respectively communicated with the hot water boiler 11 and the air energy heat pump 2. The controller 10 can control the working status (such as start, stop, etc.) of the hot water boiler 11 and the air energy heat pump 2 to achieve dual heat source heating sterilization.

[0077] Combination Figure 2As shown, in some embodiments of the present specification, the dual-heat source hot water sterilization system includes a first water pump 81, a second water pump 82 and a third water pump 83. The first water pump 81 can be arranged on the first water supply pipe section 31 or the second water return pipe section 42, and is used to circulate the water in the water storage tank 6 to the water heater system 1 and the air energy heat pump 2. The second water pump 82 can be arranged on the second water supply pipe section 32 or the first water return pipe section 41, and is used to circulate the water in the second water supply pipe section 32 to the water storage tank 6; the water circulated to the water storage tank 6 by the second water pump 82 can be circulated to the water heater system 1 and the air energy heat pump 2 through the first water pump 81 for heating and sterilization. In this way, dual-heat source circulation heating sterilization is realized, and the sterilization is more thorough and faster. The third water pump 83 can be arranged on the pipeline between the water inlet of the first flow channel 121 and the water outlet of the water heater 11, or on the pipeline between the water outlet of the first flow channel 121 and the water inlet of the water heater 11, so as to realize internal water circulation between the water heater 11 and the plate exchanger 12.

[0078] Combination Figure 3 As shown, the controller 10 is communicatively connected with the first water pump 81, the second water pump 82 and the third water pump 83 respectively. The controller 10 can control the working status (such as start, stop, etc.) of the first water pump 81, the second water pump 82 and the third water pump 83 to achieve dual heat source circulation heating sterilization.

[0079] refer to Figure 2 As shown, the water tank 6 is provided with a first temperature sensor 91, which is used to detect the water temperature of the water in the water tank 6; the first return pipe section 41 is provided with a second temperature sensor 92, which is used to detect the water temperature of the water in the first return pipe section 41. Figure 3 As shown, the controller 10 is respectively connected to the first temperature sensor 91 and the second temperature sensor 92 for communication; the controller 10 can receive the water temperature collected by the first temperature sensor 91 and the water temperature collected by the second temperature sensor 92 for monitoring the dual heat source heating sterilization process.

[0080] refer to Figure 2As shown, a diverter valve 7 is also provided on the second return water pipe section 42; when the diverter valve 7 is in the first state (i.e., the two-way conduction state), a part of the water in the water tank 6 and the water supply pipe 3 can flow back to the air energy heat pump 2 for heating and sterilization, and another part of the water in the water tank 6 and the water supply pipe 3 can flow back to the water heater system 1 for heating and sterilization; when the diverter valve 7 is in the second state (i.e., the one-way conduction state), the water in the water tank 6 and the water supply pipe 3 flows back to the air energy heat pump 2 or the water heater system 1 for heating and sterilization. Figure 3 As shown, the diverter valve 7 is connected to the controller 10 for communication, and the state of the diverter valve 7 is controlled by the controller 10; when dual-heat source heating and sterilization is required, the controller 10 controls the diverter valve 7 to be in the first state; when single-heat source heating and sterilization is required, the controller 10 controls the diverter valve 7 to be in the second state. In this way, the dual-heat source hot water sterilization system of some embodiments of this specification also has a single-heat source heating and sterilization function option, thereby providing users with more sterilization function options, which is conducive to meeting different hot water sterilization needs of different users.

[0081] In some embodiments of the present specification, the controller may be a control module separately configured from the water heater system and the air-source heat pump to facilitate inspection and maintenance; and in this case, even if the controller fails, other original functions of the water heater system will not be affected; not only that, in the scenario where a water heater system that does not have a heating and sterilization function is modified to have a heating and sterilization function, this separately configured controller is easy to implement functional modification and is less invasive to the original functional modules of the water heater system.

[0082] refer to Figure 4 and Figure 5 As shown, in some embodiments of the present specification, the controller 10 has a housing 100, the housing 100 has a frame 101 and a front panel 102, the front panel 102 is provided with a display screen 103, and the display screen 103 is provided with a touch portion (such as a touch button, Figure 4 and Figure 5 Not shown), combined Figure 2 As shown, when the touch control part is triggered, when heating sterilization is required, a part of the water in the water tank 6 and the water supply pipeline 3 can flow back to the air energy heat pump 2 for heating sterilization, and another part of the water in the water tank 6 and the water supply pipeline can flow back to the water heater system for heating sterilization; when the touch control part is not triggered, when heating sterilization is required, the water in the water tank 6 and the water supply pipeline 3 can flow back to the air energy heat pump 2 or the water heater system 1 for heating sterilization; in this way, the user can choose dual heat source heating sterilization or single heat source heating sterilization as needed.

[0083] refer to Figure 4 and Figure 5 As shown, in some embodiments of the present specification, a protective cover 104 for protecting the display screen 103 is further provided on the front panel 102, one side of the protective cover 104 is hinged to one side of the front panel 102, and the other side of the protective cover 104 is magnetically connected to the other side of the front panel 102, which is conducive to improving the convenience of the user to open or close the protective cover 104. In some embodiments of the present specification, at least a part of the material of the protective cover 104 is a light-transmitting material (such as transparent plastic, transparent glass, etc.), so that the user can observe the content displayed on the display screen 103 (such as whether the touch part is triggered) without opening the protective cover 104.

[0084] In the above Figure 1 and Figure 2 In the illustrated embodiment, the water heater system 1 and the air energy heat pump 2 are merely illustrative descriptions of multiple heat sources arranged in parallel. In other embodiments of this specification, more heat sources may be used as required by actual application scenarios, and these multiple heat sources arranged in parallel are not limited to the water heater system 1 and the air energy heat pump 2, but may also be any other suitable combination of heat sources.

[0085] It should also be understood that in the embodiments of this specification, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0086] It should also be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a device or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such device or apparatus. In the absence of further restrictions, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the device or apparatus including the element.

[0087] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A dual heat source hot water sterilization system, characterized in that: The dual-heat-source hot water sterilization system comprises a heat source, a water storage tank, a water supply pipeline and a water return pipeline; The heat source includes an air energy heat pump and a water heater system arranged in parallel; The water supply pipeline is used to supply hot water to the domestic water terminal. The water supply pipeline includes a first water supply pipeline section and a second water supply pipeline section. The water heated by the heat source can flow into the water storage tank through the first water supply pipeline section, and is supplied from the water storage tank to the domestic water terminal through the second water supply pipeline section. The return water pipeline is used to return a portion of the water in the water tank and the water supply pipeline to the air energy heat pump for heating and sterilization, and to return another portion of the water in the water tank and the water supply pipeline to the water heater system for heating and sterilization.

2. The dual heat source hot water sterilization system according to claim 1, characterized in that: The return water pipeline comprises a first return water pipeline section and a second return water pipeline section; One end of the first water return pipe section is connected to the second water supply pipe section, and the other end of the first water return pipe section is connected to the water storage tank, so as to return the water in the second water supply pipe section to the water storage tank; One end of the second water return pipe section is connected to the water storage tank, and the other end of the second water return pipe section is connected to the heat source, which is used to return the water in the water supply pipeline and the water storage tank to the heat source for heating and sterilization.

3. The dual heat source hot water sterilization system according to claim 2, characterized in that: The dual-heat-source hot water sterilization system comprises a first water pump and a second water pump; The first water pump is disposed on the first water supply pipe section or the second water return pipe section, and is used to circulate the water in the water storage tank to the heat source; The second water pump is arranged on the second water supply pipe section or the first water return pipe section, and is used for circulating the water in the second water supply pipe section to the water storage tank; The water circulated into the water storage tank by the second water pump can be circulated to the heat source through the first water pump for heating and sterilization.

4. The dual heat source hot water sterilization system according to claim 3, characterized in that: The water storage tank is provided with a first temperature sensor, and the first temperature sensor is used to detect the water temperature of the water in the water storage tank; The first water return pipe section is provided with a second temperature sensor, and the second temperature sensor is used to detect the water temperature of the water in the first water return pipe section.

5. The dual heat source hot water sterilization system according to claim 3, characterized in that: The water storage tank has a first water inlet, a first water outlet, a second water inlet and a second water outlet. The first water inlet is connected to the first water supply pipe section, the first water outlet is connected to the second water supply pipe section, the second water inlet is connected to the first water return pipe section, and the second water outlet is connected to the second water return pipe section.

6. The dual heat source hot water sterilization system according to claim 3, characterized in that: The water heater system comprises a water heater and a plate heat exchanger. The plate exchanger includes a first flow channel and a second flow channel isolated from each other. The high-temperature water generated by the water heater can flow into the first flow channel, A portion of the water in the water storage tank and the water supply pipeline can flow back to the second flow channel and perform heat exchange with the high-temperature water generated by the water heater.

7. The dual heat source hot water sterilization system according to claim 1, characterized in that: A diverter valve is also provided on the return water pipeline. When the diverter valve is in the first state, a portion of the water in the water tank and the water supply pipeline flows back to the air energy heat pump for heating and sterilization, and another portion of the water in the water tank and the water supply pipeline flows back to the hot water boiler system for heating and sterilization.

8. The dual heat source hot water sterilization system according to claim 7, characterized in that: When the diverter valve is in the second state, the water in the water storage tank and the water supply pipeline flows back to the air energy heat pump or the water heater system for heating and sterilization.

9. The dual heat source hot water sterilization system according to claim 1, characterized in that: The dual-heat-source hot water sterilization system has a controller, and the controller is communicatively connected with both the air-energy heat pump and the hot water boiler system; The controller is provided with a display screen, The display screen is provided with a touch portion for triggering heating sterilization. When the touch portion is triggered, a portion of the water in the water storage tank and the water supply pipeline can flow back to the air energy heat pump for heating sterilization, and another portion of the water in the water storage tank and the water supply pipeline can flow back to the hot water boiler system for heating sterilization.

10. The dual heat source hot water sterilization system according to claim 9, characterized in that: The controller has a shell, and the shell has a frame and a front panel; a display screen is arranged on the front panel; a protective cover for protecting the display screen is arranged on the front panel; one side of the protective cover is hinged to one side of the front panel, and the other side of the protective cover is magnetically connected to the other side of the front panel; at least a part of the material of the protective cover is a light-transmitting material.

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