Auxiliary heating unit and hot water system

Abstract

The present invention relates to an auxiliary heating unit and a hot water system. When the heating device is able to work normally, the control component is used to control one end of the heat exchanger to be connected to one of the auxiliary heat outlet pipes, and cold water flows through the auxiliary heat inlet pipe, the heat exchanger, the auxiliary heat outlet pipe, and the main heat inlet pipe, and finally enters the heating device for heating. When the heating device is unable to work normally due to the influence of climate, the control component is used to control one end of the heat exchanger to be connected to the other auxiliary heat outlet pipe, and the water pump is started. Cold water will flow through the auxiliary heat inlet pipe, the heat exchanger, the auxiliary heat outlet pipe, and the water tank inlet pipe, and finally enter the hot water storage tank for use by the user, thereby maintaining the stable and continuous operation of the hot water system and improving the safety and reliability of the water system operation. Since the present solution integrates the heat exchanger, control component, and heater into the chassis, during the modification of the heating device, it is only necessary to connect the corresponding ports on the chassis to achieve the corresponding auxiliary heating work.

Description

Technical Field

[0001] The present invention relates to the technical field of hot water equipment, in particular to an auxiliary heating unit and a hot water system. Background Art

[0002] With the development of low-carbon technologies, new energy sources for hot water supply are gradually being developed, such as solar collectors and air-source heat pumps. However, these heating devices are significantly affected by volatile natural conditions. Once the climate changes, these heating devices will not be able to provide heat properly, resulting in the failure of the hot water system to operate normally. Since the operation of gas heating devices is basically unaffected by climatic conditions, gas heating devices, as auxiliary heat sources, play an important role in improving the load response characteristics of hot water heating and optimizing the economic efficiency of hot water systems.

[0003] Traditional hot water systems typically use gas water heaters as a retrofit for the heating unit. This process requires dismantling the gas water heater and then reinstalling the components on the heating unit. However, this approach complicates system installation, requires extensive on-site work, and requires a long construction period, significantly impacting the stability and reliability of the hot water system. Summary of the Invention

[0004] The first technical problem solved by the present invention is to provide an auxiliary heating unit to simplify the installation process of the hot water system, shorten the construction period, and make the installation of the hot water system more convenient; at the same time, it also improves the stability and reliability of the operation of the hot water system.

[0005] The second technical problem solved by the present invention is to provide a hot water system that simplifies the installation process of the hot water system, shortens the construction period, and makes the installation of the hot water system more convenient; at the same time, it also improves the stability and reliability of the operation of the hot water system.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] An auxiliary heating unit, the auxiliary heating unit is used to be connected to the heating device and the water path of the hot water storage tank, the hot water storage tank is provided with a water outlet, the auxiliary heating unit comprises: a chassis; a heater, the heater is arranged in the chassis; a heat exchanger, the heat exchanger is arranged opposite to the heater; an auxiliary heat water inlet pipe, the auxiliary heat water inlet pipe is located upstream of the heat exchanger, the auxiliary heat water inlet pipe is used to communicate with the water tank outlet pipe of the hot water storage tank; a water pump, the water pump is used to provide power for the water flow in the heat exchanger; two auxiliary heat water outlet pipes, two The auxiliary heat outlet pipeline is connected in parallel downstream of the heat exchanger. When any one of the two auxiliary heat outlet pipelines is connected to the heat exchanger, the other of the two auxiliary heat outlet pipelines is disconnected from the heat exchanger. One of the two auxiliary heat outlet pipelines is used to be connected to the water tank inlet pipeline of the heat storage tank, and the other of the two auxiliary heat outlet pipelines is connected to the main heat inlet pipeline of the heating device; a control component, the control component is located in the chassis, and the control component is used to control the connection and disconnection of the heat exchanger and the two auxiliary heat outlet pipelines.

[0008] The auxiliary heating unit described in the present invention has the following beneficial effects compared with the background technology: during use, the auxiliary heat water inlet pipe is connected to the water tank outlet pipe of the hot water storage tank respectively, one auxiliary heat water outlet pipe is connected to the water tank inlet pipe of the hot water storage tank and the other auxiliary heat water outlet pipe is connected to the main heat water inlet pipe of the heating device. When the heating device is able to work normally, the control component is used to control one end of the heat exchanger to be connected to one of the auxiliary heat outlet pipes, and the water pump is started. At this time, the cold water in the heat storage tank flows through the auxiliary heat inlet pipe, the heat exchanger, the auxiliary heat outlet pipe and the main heat inlet pipe under the action of the water pump, and finally enters the heating device for heating; when the heating device cannot work normally due to the influence of climate, the control component is used to control one end of the heat exchanger to be connected to the other first auxiliary heat outlet pipe, and the water pump is started. At this time, the cold water in the heat storage tank will flow through the auxiliary heat inlet pipe, the heat exchanger, the auxiliary heat outlet pipe and the water tank inlet pipe, and finally enter the heat storage tank for use by users. In this way, the auxiliary heating unit and the auxiliary heating device work to maintain the stable and continuous operation of the hot water system, thereby improving the safety and reliability of the water system operation. Since this solution integrates the heat exchanger, control components and heater into the chassis, during the modification of the heating device, it is only necessary to connect the ports on the chassis accordingly to achieve the corresponding auxiliary heating work. This simplifies the installation process of the hot water system, shortens the construction period, and makes the installation of the hot water system convenient.

[0009] In one embodiment, the control component is a three-way valve, and the two auxiliary heating water outlet pipelines are divided into a first auxiliary heating water outlet pipeline and a second auxiliary heating water outlet pipeline. One end of the three-way valve is connected to one end of the heat exchanger, one end of the three-way valve is connected to the first auxiliary heating water outlet pipeline, and the other end of the three-way valve is connected to the second auxiliary heating water outlet pipeline.

[0010] In one embodiment, the auxiliary heating unit also includes a first control valve and a drainage pipe. The first control valve is located on the drainage pipe. The drainage pipe is connected to the water outlet of the water pump. The first control valve is used to control the connection between the water outlet of the water pump and the drainage pipe.

[0011] In one embodiment, the auxiliary heating unit further includes a flow detector, which is connected to the water pump and is used to detect the water flow on the water pump.

[0012] In one embodiment, the auxiliary heating unit further includes a second control valve, one end of the second control valve is communicated with one end of the heat exchanger, and the other end of the second control valve is communicated with the other end of the heat exchanger.

[0013] In one embodiment, the auxiliary heating unit further includes a first one-way valve. When the water pump is connected between the auxiliary heating water inlet pipeline and the heat exchanger, the water pump, the first one-way valve and the heat exchanger are connected in water in sequence.

[0014] In one embodiment, the auxiliary heating unit further includes a condensing heat exchanger, on which a condensing heat exchanger and a flue gas channel are provided, the condensing heat exchanger being arranged opposite to each other, the condensing heat exchange pipeline being connected between the auxiliary heat water inlet pipeline and the heat exchanger, the flue gas channel including a condensed water discharge port, and the condensed water discharge port being connected to the outside of the chassis.

[0015] In one embodiment, the auxiliary heating unit further includes a fan, which is installed in the chassis and is used to discharge the smoke or water vapor generated by the heater out of the chassis.

[0016] The second technical problem mentioned above is solved by the following technical solution:

[0017] A hot water system comprises a heating device, a heat storage tank and an auxiliary heating unit, wherein the heating device is provided with a main heat water inlet pipeline and a main heat water outlet pipeline, the heat storage tank is provided with a water outlet tank inlet pipeline and a water tank outlet pipeline, the main heat water inlet pipeline is connected to any one of the two auxiliary heat water outlet pipelines, the other auxiliary heat water outlet pipeline and the main heat water outlet pipeline are both connected to the water tank inlet pipeline, and the water tank outlet pipeline is connected to the auxiliary heat water inlet pipeline.

[0018] The hot water system described in the present invention has the following beneficial effects compared with the background technology: during use, the auxiliary heat water inlet pipe is connected to the water tank outlet pipe of the heat storage tank respectively, one of the auxiliary heat water outlet pipes is connected to the water tank inlet pipe of the heat storage tank and the other auxiliary heat water outlet pipe is connected to the main heat water inlet pipe of the heating device. When the heating device is able to work normally, the control component is used to control one end of the heat exchanger to be connected to one of the auxiliary heat outlet pipes, and the water pump is started. At this time, the cold water in the heat storage tank flows through the auxiliary heat inlet pipe, the heat exchanger, the auxiliary heat outlet pipe and the main heat inlet pipe under the action of the water pump, and finally enters the heating device for heating; when the heating device cannot work normally due to the influence of climate, the control component is used to control one end of the heat exchanger to be connected to the other auxiliary heat outlet pipe, and the water pump is started. At this time, the cold water in the heat storage tank will flow through the auxiliary heat inlet pipe, the heat exchanger, the auxiliary heat outlet pipe and the water tank inlet pipe, and finally enter the heat storage tank for use by users. In this way, the auxiliary heating unit and the auxiliary heating device work to maintain the stable and continuous operation of the hot water system, thereby improving the safety and reliability of the water system operation. Since this solution integrates the heat exchanger, control components and heater into the chassis, during the modification of the heating device, it is only necessary to connect the ports on the chassis accordingly to achieve the corresponding auxiliary heating work. This simplifies the installation process of the hot water system, shortens the construction period, and makes the installation of the hot water system convenient.

[0019] In one embodiment, the heating device is a solar collector or an air source heat pump.

[0020] In one embodiment, the hot water system further includes a second one-way valve and a water supply pipe, and the water supply pipe is connected to the auxiliary heating water inlet pipe or the water tank outlet pipe through the second one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Schematic diagram of the auxiliary heating unit structure in one embodiment;

[0024] Figure 2A schematic diagram of the hot water system structure in solar heating mode according to an embodiment;

[0025] Figure 3 A schematic diagram of the hot water system structure in auxiliary heating mode according to an embodiment;

[0026] Figure 4 This is a schematic diagram of the structure of an auxiliary heating unit with a drainage pipeline added in one embodiment;

[0027] Figure 5 This is a schematic structural diagram of an auxiliary heating unit with a second control valve added in one embodiment;

[0028] Figure 6 Schematic diagram of the hot water system flowing through the second control valve in one embodiment;

[0029] Figure 7 This is a structural schematic diagram of an auxiliary heating unit with a first one-way valve added in one embodiment;

[0030] Figure 8 This is a schematic diagram of the structure of an auxiliary heating unit with a condensing heat exchanger added in one embodiment;

[0031] Figure 9 Schematic diagram of the hot water system structure in one embodiment;

[0032] Figure 10 Schematic diagram of the hot water system structure in another embodiment.

[0033] Reference numerals:

[0034] 100, auxiliary heating unit, 110, chassis, 111, auxiliary heating water inlet pipe, 112, auxiliary heating water outlet pipe, 1121, first auxiliary heating water outlet pipe, 1122, second auxiliary heating water outlet pipe, 113, drainage pipe, 120, heat exchanger, 130, control component, 140, water pump, 141, first check valve, 150, heater, 160, fan, 170, first control valve, 171, flow detector, 180, second control valve Valve, 190, condensing heat exchanger, 191, condensing heat exchange pipeline, 192, flue gas channel, 193, condensate discharge port, 200, heating device, 210, solar collector, 220, air source heat pump, 230, main heat water inlet pipeline, 240, main heat water outlet pipeline, 300, heat storage tank, 310, water tank inlet pipeline, 320, water tank outlet pipeline, 330, water outlet, 400, water supply pipe, 410, second one-way valve. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0038] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0041] In one embodiment, please refer to Figure 1 、 Figure 2 and Figure 3 An auxiliary heating unit 100 is provided. The auxiliary heating unit 100 is used to be connected to the heating device 200 and the hot water storage tank 300 by water. The hot water storage tank 300 is provided with a water outlet 330. The auxiliary heating unit 100 includes: a chassis 110, a heater 150, a heat exchanger 120, an auxiliary heat water inlet pipe 111, a water pump 140, two auxiliary heat water outlet pipes 112, and a control component 130. The heater 150 is disposed in the chassis 110. The heat exchanger 120 is disposed opposite the heater 150. The auxiliary heat water inlet pipe 111 is located upstream of the heat exchanger 120 and is used to communicate with the water tank outlet pipe 320 of the hot water storage tank 300. The water pump 140 is used to provide power for the water flow in the heat exchanger 120. Two auxiliary heat outlet pipes 112 are connected in parallel downstream of the heat exchanger 120. When either of the two auxiliary heat outlet pipes 112 is connected to the heat exchanger 120, the other is disconnected from the heat exchanger 120. One of the two auxiliary heat outlet pipes 112 is connected to the water tank inlet pipe 310 of the hot water storage tank 300, while the other is connected to the main heat inlet pipe 230 of the heating device 200. A control assembly 130 is located within the chassis 110 and is used to control the connection and disconnection between the heat exchanger 120 and the two auxiliary heat outlet pipes 112.

[0042] During the process, the auxiliary heat inlet pipe 111 is connected to the water tank outlet pipe 320 of the heat storage tank 300, one auxiliary heat outlet pipe 112 is connected to the water tank inlet pipe 310 of the heat storage tank 300, and the other auxiliary heat outlet pipe 112 is connected to the main heat inlet pipe 230 of the heating device 200. Figure 2 and Figure 3 ,in, Figure 2 and Figure 3The dotted line in the figure represents the flow path of water in the hot water system. When the heating device 200 is able to work normally, the control component 130 controls one end of the heat exchanger 120 to be connected to one of the auxiliary heat water outlet pipes 112, and the water pump 140 is started. At this time, the cold water in the hot water storage tank 300 flows through the auxiliary heat water inlet pipe 111, the heat exchanger 120, the auxiliary heat water outlet pipe 112 and the main heat water inlet pipe 230 under the action of the water pump 140, and finally enters the heating device 200 for heating. When the heating device 200 cannot work normally due to the influence of climate, the control component 130 is used to control the cold water in the hot water storage tank 300. Component 130 controls one end of the heat exchanger 120 to communicate with the other auxiliary heat outlet pipe 112, and starts the water pump 140. At this time, the cold water in the hot water storage tank 300 will flow through the auxiliary heat inlet pipe 111, the heat exchanger 120, the auxiliary heat outlet pipe 112, and the water tank inlet pipe 310, and finally enter the hot water storage tank 300 for use by the user. In this way, through the auxiliary heating unit 100, the auxiliary heating device 200 operates, maintaining the stable and continuous operation of the hot water system and improving the safety and reliability of the water system operation. Since the heat exchanger 120, the control component 130, and the heater 150 are all integrated into the chassis 110 in this embodiment, during the modification process of the heating device 200, it is only necessary to connect the corresponding ports on the chassis 110 to achieve the corresponding auxiliary heating operation. This simplifies the installation process of the hot water system, shortens the construction period, and makes the installation of the hot water system more convenient.

[0043] It should be noted that the connections or communication between the pipelines and the heat exchanger 120, the pipelines and the control assembly 130, and the control assembly 130 and the heat exchanger 120 in this embodiment are all made using pipe fittings. The number, type, and location of the pipe fittings used in these connections or communication processes can be tailored to the specific product. For example, a straight pipe or two spliced pipes can be used between two components; a tee or multiple spliced pipes can be used to connect three or more components.

[0044] It should be noted that the present embodiment does not specifically limit the specific location of the water pump 140 and the specific connection relationship with the heat exchanger 120. It is only necessary that the water pump 140 transports water from the auxiliary heat water inlet pipe 111 to the heat exchanger 120. For example, the water pump 140 is located inside the chassis 110 and connected between one end of the heat exchanger 120 and the auxiliary heat water inlet pipe 111; or, the water pump 140 is located inside the chassis 110 and connected between one end of the heat exchanger 120 and the control component 130; or, the water pump 140 is located outside the chassis 110 and connected between the auxiliary heat water inlet pipe 111 and the water tank outlet pipe 320.

[0045] Specifically, please refer to Figure 1Water pump 140 is located within chassis 110 and connected between one end of heat exchanger 120 and auxiliary heating water inlet pipe 111. This makes the auxiliary heating unit 100 more compact and more integrated. Furthermore, placing water pump 140 on the side of heat exchanger 120 near auxiliary heating water inlet pipe 111 prevents heated water from affecting the internal structure of water pump 140.

[0046] It should also be noted that the heater 150 of this embodiment can be a variety of different types of heating equipment, such as a gas burner, an electric heater, a thermal oil heater, etc. Furthermore, the upstream and downstream of the heat exchanger 120 of this embodiment should be understood as follows: along the flow direction of water in the auxiliary heating unit 100, the direction of water flowing into the heat exchanger 120 is considered upstream, and the direction of water flowing out of the heat exchanger 120 is considered downstream.

[0047] Specifically, the heater 150 is a gas burner. The specific structure of the gas burner can be referred to existing literature and will not be described in detail here.

[0048] Optionally, the control assembly 130 of this embodiment may be a three-way valve or a plurality of independent control valves. When the control assembly 130 comprises a plurality of independent control valves, a control valve is provided on the pipeline between the heat exchanger 120 and the first auxiliary heat water outlet pipeline 1121, and a control valve is provided on the pipeline between the heat exchanger 120 and the second auxiliary heat water outlet pipeline 1122. The opening and closing of each passage are independently controlled, so that the heat exchanger 120 is selectively connected to the first auxiliary heat water outlet pipeline 1121 and the second auxiliary heat water outlet pipeline 1122.

[0049] Specifically, please refer to Figure 1 、 Figure 2 and Figure 3The control assembly 130 is a three-way valve. The two auxiliary heating water outlet pipelines 112 are divided into a first auxiliary heating water outlet pipeline 1121 and a second auxiliary heating water outlet pipeline 1122. One end of the three-way valve is connected to one end of the heat exchanger 120. One end of the three-way valve is connected to the first auxiliary heating water outlet pipeline 1121. The other end of the three-way valve is connected to the second auxiliary heating water outlet pipeline 1122. In this way, through the three-way valve, two of the components are selectively connected, so that the recycled water of the heat exchanger 120 is output from different ports, thereby realizing different heating modes of the hot water system, that is, when the heat exchanger 120 is connected with the first auxiliary heat outlet pipe 1121, since the first auxiliary heat outlet pipe 1121 is connected with the water tank inlet pipe 310, the water output by the heat exchanger 120 directly enters the hot water storage tank 300. At this time, the heating mode of the hot water system is an auxiliary heating mode, such as: gas heating mode or electric heating mode; when the heat exchanger 120 is connected with the second auxiliary heat outlet pipe 1122, since the second auxiliary heat outlet pipe 1122 is connected with the main heat inlet pipe 230, the water output by the heat exchanger 120 enters the heating device 200. At this time, the heating mode of the hot water system is the heating mode of the heating device 200, such as: solar heating mode or air source heating mode.

[0050] It should be noted that the connection or communication mode of each end of the three-way valve corresponding to the heat exchanger 120, the first auxiliary hot water outlet pipeline 1121 and the second auxiliary hot water outlet pipeline 1122 is pipe connection.

[0051] In one embodiment, please refer to Figure 4The auxiliary heating unit 100 also includes a first control valve 170 and a drain line 113. The first control valve 170 is located on the drain line 113. The drain line 113 is connected to the water outlet of the water pump 140. The first control valve 170 is used to control the flow between the water outlet of the water pump 140 and the drain line 113. As can be seen, the traditional installation location of the water pump 140 in the hot water system has certain requirements. To ensure that the inner cavity of the water pump 140 is filled with water, according to the principle of equal liquid level in the communicating vessel, the water pump 140 must be positioned below the lower limit of the water level in the hot water tank 300. Even if a pressurized hot water tank 300 is used, the water pump 140 must not be positioned higher than the top of the hot water tank 300. This significantly limits the installation of the water pump 140. Furthermore, it is very easy for the water level in the hot water tank 300 to fall below the position of the water pump 140, causing the water pump 140 to fail to operate properly. To this end, this embodiment introduces an exhaust pipe from the water outlet of water pump 140, and controls the connection between the water outlet of water pump 140 and drain line 113 via a first control valve 170. When water pump 140 becomes unable to start due to internal inflation, first control valve 170 is opened, controlling the connection between water pump 140 and drain line 113, allowing one end of water pump 140 to be directly connected to the atmosphere. At this point, the water supply pressure at both ends of water pump 140 increases. Under the influence of the water supply pressure, the air within water pump 140 is discharged from drain line 113, allowing water pump 140 to resume normal operation. Furthermore, utilizing this passageway eliminates the need for the installation location of water pump 140 to be restricted by the water level, greatly facilitating on-site construction of the hot water system. Furthermore, drain line 113 can also eliminate problems with water pump 140 starting due to factors such as scale.

[0052] Alternatively, the first control valve 170 may be a butterfly valve, a ball valve, a stop valve or other types of valves.

[0053] For further information, please refer to Figure 4 The auxiliary heating unit 100 further includes a flow detector 171. The flow detector 171 is connected to the water pump 140 and is used to detect the water flow rate of the water pump 140. In this way, the flow detector 171 detects the water flow rate of the water pump 140, allowing the operating status of the water pump 140 to be monitored in a timely manner, thereby ensuring stable operation of the hot water system.

[0054] Optionally, the flow detector 171 is a flow sensor, an electromagnetic flow meter, an electronic flow meter, etc.

[0055] In one embodiment, please refer to Figure 5 and Figure 6 ,in, Figure 6The middle dashed line represents the flow path of water in the hot water system. The auxiliary heating unit 100 further includes a second control valve 180. One end of the second control valve 180 is connected to one end of the heat exchanger 120, and the other end of the second control valve 180 is connected to the other end of the heat exchanger 120. It can be seen from this that the second control valve 180 is arranged in parallel with the heat exchanger 120. When the second control valve 180 is closed, the water flows through the heat exchanger 120; when the second control valve 180 is opened, the resistance at the second control valve 180 is smaller, and the water flows more easily through the second control valve 180. In this way, if the hot water system adopts the heating device 200 mode, such as: solar heating mode or air source heating mode, open the second control valve 180, so that the water flows through the auxiliary heat inlet pipe 111, the second control valve 180, the control component 130 and the second auxiliary heat outlet pipe 1122 in turn, and finally flows into the main heat inlet pipe 230 of the heating device 200. In this way, the heat loss and resistance loss generated by the hot water passing through the heat exchanger 120 are effectively reduced, and the operating efficiency of the hot water system is improved.

[0056] It should be noted that the two ends of the second control valve 180 can be connected to the two ends of the heat exchanger 120 by directly connecting the two ends of the second control valve 180 to the two ends of the heat exchanger 120 through pipes; or, pipes can be first connected to the two ends of the heat exchanger 120, the ends of the heat exchanger 120 are extended, and then the two ends of the second control valve 180 are connected to the pipes on both sides of the heat exchanger 120 through pipes. Of course, this embodiment does not specifically limit the pipe connection between the second control valve 180 and the heat exchanger 120; it is sufficient that the second control valve 180 and the heat exchanger 120 are connected in parallel.

[0057] Alternatively, the second control valve 180 may be a stop valve, a butterfly valve, a ball valve, or other types of valves.

[0058] Specifically, please refer to Figure 5 Both ends of the heat exchanger 120 are connected to the water pump 140 and the control component 130 through pipes, one end of the second control valve 180 is connected to the pipe between the heat exchanger 120 and the water pump 140 through a pipe, and the other end of the second control valve 180 is connected to the pipe between the heat exchanger 120 and the control component 130 through a pipe.

[0059] In one embodiment, please refer to Figure 7 The auxiliary heating unit 100 also includes a first one-way valve 141. When the water pump 140 is connected between the auxiliary heating water inlet pipe 111 and the heat exchanger 120, the water pump 140, the first one-way valve 141, and the heat exchanger 120 are sequentially connected. This ensures one-way water flow through the first one-way valve 141, preventing the backflow of high-temperature hot water and its adverse effects on the water pump 140.

[0060] In one embodiment, please refer to Figure 8 The auxiliary heating unit 100 also includes a condensing heat exchanger 190. Condensing heat exchanger 190 is provided with a condensing heat exchange pipeline 191 and a flue gas duct 192, which are arranged in opposing positions. Condensing heat exchange pipeline 191 connects between the auxiliary heating water inlet pipeline 111 and the heat exchanger 120. Flue gas duct 192 includes a condensed water discharge port 193, which communicates with the exterior of the chassis 110. As can be seen, the flue gas or water vapor within the chassis 110 is centrally transported to the condensing heat exchanger 190. Because the condensing heat exchange pipeline 191 is provided on the condensing heat exchanger 190, the water before entering the heat exchanger 120 absorbs some of the heat from the flue gas or water vapor, allowing it to be preheated before heat exchange. This effectively utilizes the heat from the flue gas or water vapor and improves the heat efficiency of the hot water system. Simultaneously, the water vapor in the condensing heat exchanger 190 cools, forming condensed water, which is discharged from the chassis 110 through the output port of the condensing heat exchanger 190.

[0061] Specifically, the condensate discharge port 193 is connected to the drainage pipe 113 through a pipe.

[0062] In one embodiment, please refer to Figure 1 The auxiliary heating unit 100 further includes a fan 160. The fan 160 is installed in the housing 110 and is used to exhaust the smoke or water vapor generated by the heater 150 outside the housing 110. In this way, the fan 160 collects the smoke or water vapor generated during the operation of the heater 150 and exhausts it out of the housing 110.

[0063] In one embodiment, please refer to Figure 9 and Figure 10 A hot water system includes a heating device 200, a heat storage tank 300, and the auxiliary heating unit 100 of any of the above embodiments. The heating device 200 is provided with a main heat water inlet pipe 230 and a main heat water outlet pipe 240. The heat storage tank 300 is provided with a tank inlet pipe 310 and a tank outlet pipe 320. The main heat water inlet pipe 230 is connected to one of the two auxiliary heat water outlet pipes 112. The other auxiliary heat water outlet pipe 112 and the main heat water outlet pipe 240 are both connected to the tank inlet pipe 310. The tank outlet pipe 320 is connected to the auxiliary heat water inlet pipe 111.

[0064] During use of the above-mentioned hot water system, the auxiliary heat inlet pipe 111 is connected to the water tank outlet pipe 320 of the hot water storage tank 300, one of the auxiliary heat outlet pipes 112 is connected to the water tank inlet pipe 310 of the hot water storage tank 300, and the other auxiliary heat outlet pipe 112 is connected to the main heat inlet pipe 230 of the heating device 200. When the heating device 200 is able to work normally, the control component 130 is used to control one end of the heat exchanger 120 to be connected to one of the auxiliary heat outlet pipes 112, and the water pump 140 is started. At this time, the cold water in the hot water storage tank 300 flows through the auxiliary heat inlet pipe 111, the heat exchanger 120, the auxiliary heat outlet pipe 112 and the main heat inlet pipe 230 under the action of the water pump 140, and finally enters the heating device 200 for heating; when the heating device 200 cannot work normally due to the influence of climate, the control component 130 is used to control the water pump 140 to start the water pump 140. Component 130 controls one end of the heat exchanger 120 to connect to the other auxiliary heat outlet pipe 112, and starts the water pump 140. At this time, the cold water in the hot water storage tank 300 will flow through the auxiliary heat inlet pipe 111, the heat exchanger 120, the auxiliary heat outlet pipe 112, and the water tank inlet pipe 310, and finally enter the hot water storage tank 300 for use by the user. In this way, through the auxiliary heating unit 100, the auxiliary heating device 200 operates, maintaining the stable and continuous operation of the hot water system, and improving the safety and reliability of the water system operation. Since the heat exchanger 120, the control component 130, and the heater 150 are all integrated into the chassis 110 in this embodiment, during the modification process of the heating device 200, only the corresponding connection ports on the chassis 110 need to be connected to achieve the corresponding auxiliary heating operation. This simplifies the installation process of the hot water system, shortens the construction period, and makes the installation of the hot water system more convenient. Specifically in this embodiment, the hot water storage source is also provided with a water outlet 330, through which hot water is provided to the user.

[0065] It should be noted that the heating device 200 may be a solar thermal collector 210, an air source heat pump 220 or other heating source devices and heat exchange equipment.

[0066] For further information, please refer to Figure 2 、 Figure 3 and Figure 10, the heating device 200 is a solar thermal collector 210 or an air source heat pump 220. When the heating device 200 is a solar thermal collector, the control component 130 controls the heat exchanger 120 and the second auxiliary heat water outlet pipeline 1122, starts the water pump 140, and the cold water in the hot water storage tank 300 flows through the auxiliary heat water inlet pipeline 111, the water pump 140, the heat exchanger 120, the control component 130, the second auxiliary heat water outlet pipeline 1122 and the main heat water inlet pipeline 230 in sequence under the action of the water pump 140, and finally enters the solar thermal collector 210 for heating; when When the heating device 200 is an air source heat pump 220, the control component 130 is used to control the heat exchanger 120 and the second auxiliary heat outlet pipe 1122, and the water pump 140 is started. Under the action of the water pump 140, the cold water in the heat storage tank 300 flows through the auxiliary heat inlet pipe 111, the water pump 140, the heat exchanger 120, the control component 130, the second auxiliary heat outlet pipe 1122 and the main heat inlet pipe 230 in sequence, and finally enters the air source heat pump 220 for heating.

[0067] In one embodiment, please refer to Figure 9 and Figure 10 The hot water system also includes a second one-way valve 410 and a water supply pipe 400. The water supply pipe 400 is connected to the auxiliary heating water inlet pipe 111 or the water tank outlet pipe 320 through the second one-way valve 410. In this way, water is replenished into the hot water storage tank 300 or the chassis 110 through the water supply pipe 400, ensuring that the hot water system can provide stable and continuous hot water.

[0068] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An auxiliary heating unit (100), the auxiliary heating unit (100) is used to be connected to a heating device (200) and a water storage tank (300) by water, the water storage tank (300) is provided with a water outlet (330), characterized in that: The auxiliary heating unit (100) comprises: Chassis (110); a heater (150), the heater (150) being disposed in the chassis (110); a heat exchanger (120), the heat exchanger (120) being arranged opposite to the heater (150); an auxiliary heat water inlet pipeline (111), the auxiliary heat water inlet pipeline (111) being located upstream of the heat exchanger (120), and the auxiliary heat water inlet pipeline (111) being used to communicate with a water tank outlet pipeline (320) of the heat storage tank (300); a water pump (140), the water pump (140) being used to provide power for the water flow in the heat exchanger (120); Two auxiliary heat outlet pipes (112), the two auxiliary heat outlet pipes (112) are connected in parallel downstream of the heat exchanger (120); when any one of the two auxiliary heat outlet pipes (112) is connected to the heat exchanger (120), the other of the two auxiliary heat outlet pipes (112) is disconnected from the heat exchanger (120); one of the two auxiliary heat outlet pipes (112) is used to be connected to the water tank inlet pipe (310) of the heat storage tank (300), and the other of the two auxiliary heat outlet pipes (112) is used to be connected to the main heat inlet pipe (230) of the heating device (200); a control component (130), the control component (130) being located in the chassis (110), and the control component (130) being used to control the on / off connection between the heat exchanger (120) and the two auxiliary heat outlet pipes (112); The auxiliary heating unit (100) further comprises a first control valve (170) and a drainage pipeline (113); the first control valve (170) is located on the drainage pipeline (113); the drainage pipeline (113) is connected to the water outlet of the water pump (140); the first control valve (170) is used to control the connection between the water outlet of the water pump (140) and the drainage pipeline (113); when the first control valve (170) is opened, the water pump (140) is controlled to be connected to the drainage pipeline (113), so that one end of the water pump (140) is connected to the atmosphere.

2. The auxiliary heating unit (100) according to claim 1, characterized in that The control component (130) is a three-way valve, and the two auxiliary heating water outlet pipelines (112) are divided into a first auxiliary heating water outlet pipeline (1121) and a second auxiliary heating water outlet pipeline (1122). One end of the three-way valve is connected to one end of the heat exchanger (120), one end of the three-way valve is connected to the first auxiliary heating water outlet pipeline (1121), and the other end of the three-way valve is connected to the second auxiliary heating water outlet pipeline (1122).

3. The auxiliary heating unit (100) according to claim 1, characterized in that The water pump (140) is located in the chassis (110), and the water pump (140) is connected between one end of the heat exchanger (120) and the auxiliary heat water inlet pipeline (111).

4. The auxiliary heating unit (100) according to claim 1, characterized in that The auxiliary heating unit (100) further comprises a flow detector (171), wherein the flow detector (171) is connected to the water pump (140), and the flow detector (171) is used to detect the water flow on the water pump (140).

5. The auxiliary heating unit (100) according to claim 1, characterized in that The auxiliary heating unit (100) further includes a second control valve (180), one end of the second control valve (180) being in communication with one end of the heat exchanger (120), and the other end of the second control valve (180) being in communication with the other end of the heat exchanger (120).

6. The auxiliary heating unit (100) according to claim 1, characterized in that The auxiliary heating unit (100) further comprises a first one-way valve (141); when the water pump (140) is connected between the auxiliary heating water inlet pipeline (111) and the heat exchanger (120), the water pump (140), the first one-way valve (141) and the heat exchanger (120) are sequentially connected in water circuit.

7. The auxiliary heating unit (100) according to any one of claims 1 to 6, characterized in that: The auxiliary heating unit (100) further comprises a condensing heat exchanger (190), wherein the condensing heat exchanger (190) is provided with a condensing heat exchange pipeline (191) and a flue gas channel (192) arranged opposite to each other, wherein the condensing heat exchange pipeline (191) is connected between the auxiliary heat water inlet pipeline (111) and the heat exchanger (120), and the flue gas channel (192) comprises a condensed water discharge port (193), and the condensed water discharge port (193) is connected to the outside of the chassis (110).

8. A hot water system, characterized in that: The invention comprises a heating device (200), a heat storage tank (300) and an auxiliary heating unit (100) according to any one of claims 1 to 7, wherein the heating device (200) is provided with a main heat water inlet pipeline (230) and a main heat water outlet pipeline (240), the heat storage tank (300) is provided with a water outlet (330), a water tank inlet pipeline (310) and a water tank outlet pipeline (320), the main heat water inlet pipeline (230) is connected to any one of the two auxiliary heat water outlet pipelines (112), the other auxiliary heat water outlet pipeline (112) and the main heat water outlet pipeline (240) are both connected to the water tank inlet pipeline (310), and the water tank outlet pipeline (320) is connected to the auxiliary heat water inlet pipeline (111).

9. The hot water system according to claim 8, characterized in that The heating device (200) is a solar thermal collector (210) or an air source heat pump (220).

10. The hot water system according to claim 8, characterized in that The hot water system further comprises a second one-way valve (410) and a water supply pipe (400), wherein the water supply pipe (400) is connected to the auxiliary heating water inlet pipe (111) or the water tank outlet pipe (320) via the second one-way valve (410).

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