Wall-mounted boiler

Abstract

The present invention relates to the technical field of household appliances, and in particular to a wall-mounted boiler. The wall-mounted boiler provided by the present invention comprises: a first main heating pipeline having a first inlet and a first outlet; a second main heating pipeline having a second inlet and a second outlet; a heating device for heating the first main heating pipeline; and a first heat exchanger for exchanging heat between the second main heating pipeline and the first main heating pipeline heated by the heating device. During use of the wall-mounted boiler of the present invention, the first inlet is connected to the outlet of the heating pipeline, the first outlet is connected to the inlet of the heating pipeline, the second inlet is connected to the outlet of domestic hot water, and the second outlet is connected to the inlet of domestic hot water, so that the first main heating pipeline heated by the heating device can supply the heat demand of the heating pipeline, and due to the setting of the first heat exchanger, the second main heating pipeline after heat exchange of the first main heating pipeline can simultaneously supply the heat demand of domestic hot water.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a wall-mounted boiler. Background Art

[0002] At present, wall-mounted boilers are mostly used to supply domestic hot water in summer and heating and domestic hot water in winter. Therefore, the wall-mounted boilers in the prior art use a three-way valve as a flow channel switching component to supply heating and domestic hot water separately in different time periods. This structure can meet the needs of most users, but a small number of user groups need to use heating and domestic hot water for a long time in winter. Since the supply temperature requirements for heating and domestic hot water in winter are very different, and the total water flow required for the simultaneous supply of heating and domestic hot water is also large, the required main heat exchanger is large in size, which occupies a large space for household appliances. Therefore, existing household wall-mounted boilers cannot meet the demand for simultaneous supply of heating and domestic hot water. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the wall-mounted boiler in the prior art cannot meet the demand of supplying heating and domestic hot water at the same time, thereby providing a wall-mounted boiler that can meet the demand of supplying heating and domestic hot water at the same time.

[0004] A wall-mounted boiler, comprising:

[0005] A first main heating pipeline having a first inlet and a first outlet;

[0006] A second main heating pipeline has a second inlet and a second outlet;

[0007] A heating device, heating the first main heating pipeline;

[0008] The first heat exchanger exchanges heat between the second main heating pipeline and the first main heating pipeline heated by the heating device.

[0009] The first heat exchanger is a phase change heat exchanger including a phase change material. The phase change material undergoes a phase change to exchange heat between the second main heating pipeline and the first main heating pipeline heated by the heating device.

[0010] The phase change temperature of the phase change material is less than 70°C.

[0011] The phase change temperature of the phase change material is 60°C.

[0012] The phase change material is a solid-liquid phase change material.

[0013] The heating device includes a heater.

[0014] The heater is a burner.

[0015] The heating device further includes a second heat exchanger, wherein the second heat exchanger includes a heat exchange medium heated by the heater, and the first main heat supply pipeline exchanges heat with the heated heat exchange medium.

[0016] Also includes a controller;

[0017] The first main heat supply pipeline is provided with a first temperature detection device between the first heat exchanger and the heating device, and the first temperature detection device is connected to the controller;

[0018] The first main heat supply pipeline is provided with a second temperature detection device between the first heat exchanger and the first outlet, and the second temperature detection device is connected to the controller;

[0019] When the temperature difference between the first temperature detection device and the second temperature detection device is less than 2° C., the controller controls the heating device to stop working.

[0020] When the temperature difference between the first temperature detection device and the second temperature detection device is greater than 15°C, or when the detection temperature of the second temperature detection device is less than the preset heating temperature by 15°C, the controller controls the heating device to start working.

[0021] The second main heat supply pipeline is provided with a third temperature detection device between the first heat exchanger and the second inlet, and the third temperature detection device is connected to the controller;

[0022] The second main heat supply pipeline is provided with a flow regulating valve between the first heat exchanger and the second outlet, and the flow regulating valve is connected to the controller;

[0023] The controller receives the temperature of the third temperature detection device and controls the opening of the flow control valve.

[0024] Also includes:

[0025] a first auxiliary heating pipeline having a third inlet and a third outlet, wherein the third inlet is connected to a pipeline of the first main heating pipeline upstream of the first heat exchanger, and the third outlet is connected to a pipeline of the first main heating pipeline upstream of the heating device;

[0026] A second auxiliary heating pipeline has a fourth inlet and a fourth outlet, the fourth inlet is connected to the second inlet, and the fourth outlet is connected to the second outlet;

[0027] The third heat exchanger exchanges heat between the first auxiliary heating pipeline and the second auxiliary heating pipeline.

[0028] The first main heat supply pipeline is provided with a first valve between the first heat exchanger and the heating device, the first valve is connected to the controller, and an auxiliary outlet end of the first valve is connected to the third inlet.

[0029] The second main heat supply pipeline is provided with a second valve between the second inlet and the first heat exchanger, the second valve is connected to the controller, and an auxiliary outlet end of the second valve is connected to the fourth inlet.

[0030] The first auxiliary heating pipeline is provided with a water replenishment valve between the third heat exchanger and the third outlet, and the auxiliary end of the water replenishment valve is connected to the pipeline of the second auxiliary heating pipeline provided between the fourth inlet and the third heat exchanger.

[0031] It also includes a water pressure balancing pipeline connected to the first main heating pipeline, and an expansion water tank is arranged on the water pressure balancing pipeline.

[0032] The technical solution of the present invention has the following advantages:

[0033] 1. The wall-mounted boiler provided by the present invention comprises: a first main heating pipeline having a first inlet and a first outlet; a second main heating pipeline having a second inlet and a second outlet; a heating device for heating the first main heating pipeline; and a first heat exchanger for exchanging heat between the second main heating pipeline and the first main heating pipeline heated by the heating device. The first main heating pipeline is heated by arranging a heating device, and the first heat exchanger exchanges heat between the second main heating pipeline and the first main heating pipeline heated by the heating device, so that the first main heating pipeline heated by the heating device can supply the heat required on one side, and the second main heating pipeline after heat exchange with the first main heating pipeline can supply the heat required on the other side. For example, during use, the first inlet is connected to the outlet of the heating pipeline, the first outlet is connected to the inlet of the heating pipeline, the second inlet is connected to the outlet of domestic hot water, and the second outlet is connected to the inlet of domestic hot water, so that the first main heating pipeline heated by the heating device can supply the heat demand of the heating pipeline. Due to the setting of the first heat exchanger, the second main heating pipeline after heat exchange with the first main heating pipeline can supply the heat demand of domestic hot water, that is, the wall-mounted boiler can use the water flow that supplies the heat demand of the heating pipeline to simultaneously meet the heat demand of the heating pipeline and the domestic hot water, and also reduces the occupied volume of the wall-mounted boiler.

[0034] 2. In the wall-mounted boiler provided by the present invention, the first heat exchanger is a phase change heat exchanger, including a phase change material, and the phase change material undergoes phase change to exchange heat between the second main heating pipeline and the first main heating pipeline heated by the heating device. By setting the first heat exchanger as a phase change heat exchanger, the phase change of the phase change material can be used to absorb a certain amount of heat. During use, the required temperature difference between the heating supply pipeline and the domestic hot water pipeline is reduced, and the phase change material can undergo phase change to store energy, which can also save energy consumption for subsequent use.

[0035] 3. In the wall-mounted boiler provided by the present invention, the phase change temperature of the phase change material is less than 70°C. Since domestic hot water needs to be supplied during the use of the wall-mounted boiler, domestic hot water will be stored in the second main heating pipeline. Since the scale formation temperature of domestic hot water is mostly above 70°C, the phase change temperature of the phase change material is set to less than 70°C, which can avoid a large amount of scaling in the pipeline, ensure the service life of the pipeline, and at the same time avoid scalding users due to excessively high temperature when domestic hot water is supplied.

[0036] 4. In the wall-mounted boiler provided by the present invention, the phase change temperature of the phase change material is 60° C. By setting the phase change temperature of the phase change material to 60° C., a large amount of scaling can be avoided. At the same time, the phase change temperature is higher than the required temperature of the heating pipeline, which can further ensure the heat supply of the phase change heat exchanger to the heating pipeline.

[0037] 5. In the wall-mounted boiler provided by the present invention, the phase change material is a solid-liquid phase change material. By setting the phase change material as a solid-liquid phase change material, the energy density of the phase change material is larger and the phase change volume is smaller, thereby reducing the volume of the phase change heat exchanger.

[0038] 6. The wall-mounted boiler provided by the present invention also includes a controller; the first main heating pipeline is provided with a first temperature detection device between the first heat exchanger and the heating device, and the first temperature detection device is connected to the controller; the first main heating pipeline is provided with a second temperature detection device between the first heat exchanger and the first outlet, and the second temperature detection device is connected to the controller; when the temperature difference between the first temperature detection device and the second temperature detection device is less than 2°C, the controller controls the heating device to stop working. When the temperature difference between the first temperature detection device and the second temperature detection device is less than 2°C, the controller controls the heating device to stop working. At this time, the phase change material completes energy storage, and the phase change heat exchanger serves as a heat source for supplying heating and domestic hot water. Since the heating device stops working, the energy consumption of the wall-mounted boiler is reduced, and the hidden danger of condensation water when the burner is used for low-temperature combustion in the wall-mounted boiler of the home of the user with floor heating or the user with good indoor thermal insulation effect is avoided, which corrodes the heat exchange tube.

[0039] 7. For the wall-mounted boiler provided by the present invention, when the temperature difference between the first temperature detection device and the second temperature detection device is greater than 15°C, or when the detected temperature of the second temperature detection device is less than the preset heating temperature of 15°C, the controller controls the heating device to start working. When the temperature difference between the first temperature detection device and the second temperature detection device is greater than 15°C, or when the detected temperature of the second temperature detection device is less than the preset heating temperature of 15°C, it indicates that the phase change material releases too much heat and can no longer be used as a heat source to supply heating and domestic hot water at the same time. At this time, the controller controls the heating device to start working, so that the phase change material re-stores energy to prepare for the subsequent process. The entire process is automatically controlled by the controller, which improves the intelligent effect of the wall-mounted boiler.

[0040] 8. The wall-mounted boiler provided by the present invention, the second main heating pipeline is provided with a third temperature detection device between the first heat exchanger and the second inlet, and the third temperature detection device is connected to the controller; the second main heating pipeline is provided with a flow control valve between the first heat exchanger and the second outlet, and the flow control valve is connected to the controller; the controller receives the temperature of the third temperature detection device and controls the opening of the flow control valve. By setting the controller to be connected with the third temperature detection device and the flow control valve provided on the second main heating pipeline, the opening of the flow control valve can be automatically adjusted according to the temperature of the second main heating pipeline after heat exchange with the phase change material, so that the temperature of the second main heating pipeline after heat exchange can better supply the domestic hot water required by the user.

[0041] 9. The wall-mounted boiler provided by the present invention also includes a first auxiliary heating pipeline, having a third inlet and a third outlet, the third inlet is connected to the pipeline of the first main heating pipeline upstream of the first heat exchanger, and the third outlet is connected to the pipeline of the first main heating pipeline upstream of the heating device; the second auxiliary heating pipeline has a fourth inlet and a fourth outlet, the fourth inlet is connected to the second inlet, and the fourth outlet is connected to the second outlet; the third heat exchanger exchanges heat between the first auxiliary heating pipeline and the second auxiliary heating pipeline. By providing the first auxiliary heating pipeline, the second auxiliary heating pipeline and the third heat exchanger, the wall-mounted boiler can meet the needs of domestic hot water when operating in summer. At this time, since there is no need for heating, there is no need to open a phase change heat exchanger, which prevents the circulation of the heating pipeline.

[0042] 10. In the wall-mounted boiler provided by the present invention, the first main heating pipeline is provided with a first valve between the first heat exchanger and the heating device, the first valve is connected to the controller, and the auxiliary outlet end of the first valve is connected to the third inlet. By providing the first valve, the connection between the first main heating pipeline and the first auxiliary heating pipeline is simpler, and the overall structure of the wall-mounted boiler is more compact and smaller in size.

[0043] 11. In the wall-mounted boiler provided by the present invention, the second main heating pipeline is provided with a second valve between the second inlet and the first heat exchanger, the second valve is connected to the controller, and the auxiliary outlet end of the second valve is connected to the fourth inlet. By providing the second valve, the connection between the second main heating pipeline and the second auxiliary heating pipeline is simpler, and the overall structure of the wall-mounted boiler is more compact and smaller in size.

[0044] 12. In the wall-mounted boiler provided by the present invention, a water supply valve is provided between the third heat exchanger and the third outlet of the first auxiliary heating pipeline, and the auxiliary end of the water supply valve is connected to the pipeline of the second auxiliary heating pipeline provided between the fourth inlet and the third heat exchanger. By providing the water supply valve, and connecting the water supply valve to the first auxiliary heating pipeline and the second auxiliary heating pipeline at the same time, water can be supplied to each pipeline more conveniently when replenishing the wall-mounted boiler.

[0045] 13. The wall-mounted boiler provided by the present invention further comprises a water pressure balancing pipeline connected to the first main heating pipeline, and an expansion water tank is arranged on the water pressure balancing pipeline. By arranging the expansion water tank, the water pressure balance of each pipeline of the wall-mounted boiler can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 It is a structural schematic diagram of the wall-mounted boiler of the present invention;

[0048] Description of reference numerals:

[0049] 1-first main heating pipeline; 2-first inlet; 3-first outlet; 4-second main heating pipeline; 5-second inlet; 6-second outlet; 7-burner; 8-phase change heat exchanger; 9-second heat exchanger; 10-first temperature detection device; 11-second temperature detection device; 12-third temperature detection device; 13-first auxiliary heating pipeline; 14-second auxiliary heating pipeline; 15-third heat exchanger; 16-first valve; 17-second valve; 18-water supply valve; 19-water pressure balance pipeline; 20-expansion water tank; 21-flow regulating valve; 22-water flow sensor; 23-water pressure sensor; 24-limit thermostat; 25-temperature sensor; 26-combustion pipeline; 27-proportional valve; 28-fan. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] like Figure 1 As shown, this embodiment provides a wall-mounted boiler, including: a first main heating pipeline 1, a second main heating pipeline 4, a heating device and a first heat exchanger.

[0053] The first main heating pipeline 1 has a first inlet 2 and a first outlet 3; the second main heating pipeline 4 has a second inlet 5 and a second outlet 6; the heating device heats the first main heating pipeline 1; the first heat exchanger exchanges heat between the second main heating pipeline 4 and the first main heating pipeline 1 heated by the heating device.

[0054] The first main heating pipeline 1 is heated by arranging a heating device, and the first heat exchanger exchanges heat between the second main heating pipeline 4 and the first main heating pipeline 1 heated by the heating device, so that the first main heating pipeline 1 heated by the heating device can supply the heat required on one side, and the second main heating pipeline 4 after heat exchange with the first main heating pipeline 1 can supply the heat required on the other side. For example, during use, the first inlet 2 is connected to the outlet of the heating pipeline, the first outlet 3 is connected to the inlet of the heating pipeline, the second inlet 5 is connected to the outlet of domestic hot water, and the second outlet 6 is connected to the inlet of domestic hot water, so that the first main heating pipeline 1 heated by the heating device can supply the heat demand of the heating pipeline. Due to the setting of the first heat exchanger, the second main heating pipeline 4 after heat exchange with the first main heating pipeline 1 can supply the heat demand of domestic hot water, that is, the wall-mounted boiler can use the water flow that supplies the heat demand of the heating pipeline to simultaneously meet the heat demand of the heating pipeline and the domestic hot water, and also reduces the occupied volume of the wall-mounted boiler.

[0055] The wall-mounted boiler in this embodiment is a gas wall-mounted boiler, the heating device includes a heater, and the heater is a burner 7, the heating device also includes a second heat exchanger 9, the second heat exchanger 9 includes a heat exchange medium heated by the burner 7, and the first main heating pipeline 1 exchanges heat with the heated heat exchange medium. As a convertible implementation, the wall-mounted boiler can also be a wall-mounted boiler of other forms, and the heater of the heating device is an electric heater.

[0056] The first heat exchanger in this embodiment is a phase change heat exchanger 8, which includes a phase change material. The phase change material undergoes a phase change to exchange heat between the second main heating pipeline 4 and the first main heating pipeline 1 heated by the heating device. By setting the first heat exchanger as a phase change heat exchanger 8, the phase change of the phase change material can be used to absorb a certain amount of heat. During use, the required temperature difference between the heating supply pipeline and the domestic hot water pipeline is reduced, and the phase change material can undergo phase change to store energy, which can also save energy for subsequent use. As a convertible embodiment, it is also possible that the first heat exchanger is a non-phase change heat exchanger 8, which only allows the first main heating pipeline 1 to exchange heat with the second main heating pipeline 4.

[0057] There are many types of phase change materials, and different phase change materials have different phase change temperatures. The phase change temperature of the phase change material in this embodiment is <70°C. Since domestic hot water needs to be supplied during the use of the wall-mounted boiler, domestic hot water will be stored in the second main heating pipeline 4. Since the scale formation temperature of domestic hot water is mostly above 70°C, setting the phase change temperature of the phase change material to less than 70°C can avoid a large amount of scaling in the pipeline, ensure the service life of the pipeline, and at the same time avoid excessive temperature when domestic hot water is supplied. Burns to users. As a convertible implementation method, the phase change temperature of the phase change material can also be set to be greater than 70°C.

[0058] Specifically, the phase change temperature of the phase change material in this embodiment is 60° C. By setting the phase change temperature of the phase change material to 60° C., a large amount of scaling can be avoided. At the same time, the phase change temperature is higher than the required temperature of the heating pipeline, which can further ensure the heat supply of the phase change heat exchanger 8 to the heating pipeline.

[0059] The phase change material in this embodiment is a solid-liquid phase change material, such as molten salts, paraffins, ester acids, etc. By setting the phase change material as a solid-liquid phase change material, the energy density of the phase change material is large and the phase change volume is small, thereby reducing the volume of the phase change heat exchanger 8. As a convertible implementation, the phase change material can also be a solid-solid phase change material, such as a polymer composite shaped phase change material, an organic nano composite shaped phase change material, an inorganic nano composite shaped phase change material, etc.

[0060] The wall-mounted boiler in this embodiment also includes a controller; the first main heating pipeline 1 is provided with a first temperature detection device 10 between the first heat exchanger and the heating device, and the first temperature detection device 10 is connected to the controller; the first main heating pipeline 1 is provided with a second temperature detection device 11 between the first heat exchanger and the first outlet 3, and the second temperature detection device 11 is connected to the controller; when the temperature difference between the first temperature detection device 10 and the second temperature detection device 11 is less than 2°C, the controller controls the heating device to stop working. When the temperature difference between the first temperature detection device 10 and the second temperature detection device 11 is less than 2°C, the controller controls the heating device to stop working. At this time, the phase change material completes energy storage, and the phase change heat exchanger 8 serves as a heat source for supplying heating and domestic hot water. Since the heating device stops working, the energy consumption of the wall-mounted boiler is reduced, and the hidden danger of condensed water when the burner 7 is used for low-temperature combustion in the wall-mounted boiler in the home of users with floor heating or better indoor thermal insulation is avoided, which corrodes the heat exchange tube.

[0061] When the temperature difference between the first temperature detection device 10 and the second temperature detection device 11 is greater than 15°C, or when the detected temperature of the second temperature detection device 11 is less than the preset heating temperature of 15°C, the controller controls the heating device to start working. When the temperature difference between the first temperature detection device 10 and the second temperature detection device 11 is greater than 15°C, or when the detected temperature of the second temperature detection device 11 is less than the preset heating temperature of 15°C, it indicates that the phase change material releases too much heat and can no longer be used as a heat source to supply heating and domestic hot water at the same time. At this time, the controller controls the heating device to start working, so that the phase change material re-stores energy to prepare for the follow-up. The entire process is automatically controlled by the controller, which improves the intelligent effect of the wall-mounted boiler.

[0062] In this embodiment, the second main heating pipeline 4 is provided with a third temperature detection device 12 between the first heat exchanger and the second inlet 5, and the third temperature detection device 12 is connected to the controller; the second main heating pipeline 4 is provided with a flow control valve 21 between the first heat exchanger and the second outlet 6, and the flow control valve 21 is connected to the controller; the controller receives the temperature of the third temperature detection device 12 and controls the opening of the flow control valve 21. By setting the controller to be connected with the third temperature detection device 12 and the flow control valve 21 provided on the second main heating pipeline 4, the opening of the flow control valve 21 can be automatically adjusted according to the temperature of the second main heating pipeline 4 after heat exchange with the phase change material, so that the temperature of the second main heating pipeline 4 after heat exchange can better supply the domestic hot water required by the user.

[0063] Specifically, the first temperature detection device 10, the second temperature detection device 11 and the third temperature detection device 12 in this embodiment are temperature sensors. As a convertible implementation, the first temperature detection device 10, the second temperature detection device 11 and the third temperature detection device 12 may be temperature sensing packages, or the first temperature detection device 10, the second temperature detection device 11 and the third temperature detection device 12 may be any combination of temperature sensors, temperature sensing packages or temperature probes, or any device capable of detecting temperature.

[0064] The wall-mounted boiler in this embodiment also includes a first auxiliary heating pipeline 13, which has a third inlet and a third outlet, the third inlet is connected to the pipeline of the first main heating pipeline 1 upstream of the first heat exchanger, and the third outlet is connected to the pipeline of the first main heating pipeline 1 upstream of the heating device; a second auxiliary heating pipeline 14, which has a fourth inlet and a fourth outlet, the fourth inlet is connected to the second inlet 5, and the fourth outlet is connected to the second outlet 6; a third heat exchanger 15, which exchanges heat between the first auxiliary heating pipeline 13 and the second auxiliary heating pipeline 14. By providing the first auxiliary heating pipeline 13, the second auxiliary heating pipeline 14 and the third heat exchanger 15, the wall-mounted boiler can meet the needs of domestic hot water when operating in summer. At this time, since heating is not required, there is no need to open the phase change heat exchanger 8, which prevents the circulation of the heating pipeline.

[0065] Specifically, the first main heating pipeline 1 in this embodiment is provided with a first valve 16 between the first heat exchanger and the heating device, the first valve 16 is connected to the controller, and the auxiliary outlet end of the first valve 16 is connected to the third inlet; the second main heating pipeline 4 is provided with a second valve 17 between the second inlet 5 and the first heat exchanger, the second valve 17 is connected to the controller, and the auxiliary outlet end of the second valve 17 is connected to the fourth inlet. By providing the first valve 16, the connection between the first main heating pipeline 1 and the first auxiliary heating pipeline 13 is simpler, and by providing the second valve 17, the connection between the second main heating pipeline 4 and the second auxiliary heating pipeline 14 is simpler, and the overall structure of the wall-mounted boiler is more compact and smaller. As a convertible embodiment, it can also be a pipeline in which the first main heating pipeline 1 is arranged in parallel with the first auxiliary heating pipeline 13, and the second main heating pipeline 4 is arranged in parallel with the second auxiliary heating pipeline 14.

[0066] In this embodiment, the first valve 16 and the second valve 17 are three-way valves. Preferably, the first valve 16 and the second valve 17 are electromagnetic three-way valves. As a convertible embodiment, the first valve 16 and the second valve 17 can be two two-way valves, or a four-way valve, or a multi-way valve.

[0067] In order to facilitate water replenishment, the first auxiliary heating pipeline 13 in this embodiment is provided with a water replenishment valve 18 between the third heat exchanger 15 and the third outlet, and the auxiliary end of the water replenishment valve 18 is connected to the pipeline of the second auxiliary heating pipeline 14 provided between the fourth inlet and the third heat exchanger 15. By providing the water replenishment valve 18 to be connected to the first auxiliary heating pipeline 13 and the second auxiliary heating pipeline 14 at the same time, water can be conveniently supplied to each pipeline when replenishing the wall-mounted boiler.

[0068] In order to ensure the water pressure balance of each pipeline of the wall-mounted boiler, the wall-mounted boiler in this embodiment also includes a water pressure balance pipeline 19, which is connected to the first main heating pipeline 1 and is arranged between the first inlet 2 and the heating device of the first main heating pipeline 1. An expansion water tank 20 and a water pressure sensor 23 are provided on the water pressure balance pipeline 19.

[0069] In order to ensure water circulation in the pipelines, a circulating water pump is also provided on the common pipeline of the first main heating pipeline 1 and the first auxiliary heating pipeline 13 (ie, between the first inlet 2 and the heating device, and between the third outlet and the heating device).

[0070] In order to control the water flow of domestic hot water in summer, a water flow sensor 22 is set on the pipeline of the second auxiliary heating pipeline 14 between the fourth inlet and the third heat exchanger 15, and a temperature sensor 25 is set on the pipeline of the second auxiliary heating pipeline 14 between the third heat exchanger 15 and the fourth outlet, and both the water flow sensor 22 and the temperature sensor 25 are connected to the controller.

[0071] In order to monitor the outlet temperature of the second heat exchanger 9 and prevent the temperature of the burner 7 from being too high, a limit temperature controller 24 is further provided at the outlet of the first main heating pipeline 1 at the second heat exchanger 9 .

[0072] The wall-mounted boiler in this embodiment needs to be replenished with water before use. The water replenishment valve 18 is opened for water replenishment. At this time, the first valve 16 and the second valve 17 are connected to the heating pipeline by default. The first inlet 2 of the first main heating pipeline 1 is connected to the outlet of the heating pipeline, the first outlet 3 is connected to the inlet of the heating pipeline, the second inlet 5 of the second main heating pipeline 4 is connected to the outlet of domestic hot water, and the second outlet 6 is connected to the inlet of domestic hot water. At this time, water flows into the heating pipeline through the second inlet 5, flows into the heating pipeline through the water replenishment valve 18, replenishes water to the water pressure sensor 23 to detect the water pressure of 1.0bar-1.5bar, and the water replenishment valve 18 is closed.

[0073] When used in winter, the wall-mounted boiler can run in heating and domestic hot water modes at the same time. The wall-mounted boiler is started, and the burner 7 begins to burn. At this time, it burns according to the rated heat input power, and the water pump is turned on to ensure the stable heating of the wall-mounted boiler. The second heat exchanger 9 outputs water at 80°C, and after the phase change heat exchanger 8 stores heat, it ensures that the water output is 60°C. At this time, the phase change heat exchanger 8 starts to store energy, the temperature of the phase change material rises, and the phase change material melts and undergoes phase change. This process requires the absorption of heat and storage in the form of latent heat. At the same time, domestic water can be heated. Domestic water is generally 20°C. The phase change heat exchanger 8 is during the phase change period. Maintain 50℃-60℃, the temperature of the phase change heat exchanger 8 near the heating pipeline is lower than the outlet temperature of the second heat exchanger 9, the phase change material absorbs heat and stores energy, the temperature near the domestic hot water is higher than the return water temperature of the domestic hot water, the phase change material releases heat, the phase change materials inside the phase change heat exchanger 8 form an overall thermal balance by heat transfer, energy storage and heat supply occur simultaneously, at this time, the phase change heat exchange thermal balance is achieved inside the phase change heat exchanger 8, the second main heating pipeline 4 with a lower temperature is below the crystallization point, the crystallization process releases heat, the first main heating pipeline 1 with a higher temperature is above the melting point, Melting absorbs heat, and the two processes form a thermal equilibrium. The phase change material does not undergo phase change. The small particles inside the phase change material and the molten material easily form convection heat exchange to achieve thermal equilibrium. The phase change material has completed energy storage and is in liquid phase. At this time, the temperature difference between the first temperature detection device 10 and the second temperature detection device 11 is less than 2°C. The controller receives a signal to control the proportional valve 27 on the combustion pipeline 26 of the burner 7 and the fan 28 on the top of the burner 7 to stop moving, and the burner 7 is turned off. At this time, the heating system reaches a thermal equilibrium state, and the water pump reduces the flow rate to ensure heating and heating. The phase change The energy storage heat exchanger provides a heat source for domestic water, and the controller controls the opening of the flow regulating valve 21 according to the user's required temperature and the detected temperature of the third temperature detection device 12; when the heating demand temperature is lower than the available temperature of the phase change heat exchanger 8, that is, lower than 60°C, the heat source of the heating pipeline is provided by the phase change heat exchanger 8, the phase change material undergoes a crystallization process, and the phase change releases heat, which provides heating and hot water to avoid long-term low-temperature combustion of wall-mounted boilers in the homes of users with floor heating or users with good indoor thermal insulation, and the high-temperature flue gas of the burner 7 condenses when it encounters the cold heat exchange tubes, thereby corroding the heat exchange tubes. After the phase change heat exchanger 8 stores energy, the temperature is about 60°C, the actual required water temperature for heating is 45°C-50°C, and the temperature of domestic water is about 20°C. Both water temperatures are lower than the temperature of the phase change heat exchanger 8. The phase change heat exchanger 8 heats both heating water and domestic water at the same time. When the temperature difference between the first temperature detection device 10 and the second temperature detection device 11 is greater than 15°C, or when the detection temperature of the second temperature detection device 11 is less than the preset heating temperature of 15°C, the controller controls the fan 28 and the proportional valve 27 to be reopened, and the burner 7 is used as a heat source for heating and domestic hot water, and the phase change heat exchanger 8 stores energy.

[0074] When used in winter, the wall-mounted boiler can also operate in heating mode alone. Since the phase change temperature of the phase change heat exchanger 8 is less than 70°C, the domestic hot water water channel is not easy to scale. The wall-mounted boiler can be operated with heating water and domestic hot water at the same time. At this time, the flow regulating valve 21 is adjusted to the 0 opening state, and the phase change heat exchanger 8 only performs energy storage action to prepare for the simultaneous supply of heating and domestic hot water.

[0075] When used in summer, since there is no need to turn on the heating function, the entire wall-mounted boiler heats domestic hot water by flowing through the first auxiliary heating pipeline 13, the third heat exchanger 15 and the second auxiliary heating pipeline 14. In this mode, the phase change heat exchanger 8 is not turned on, and the first valve 16 connects the first main heating pipeline 1, the pipeline between the first valve 16 and the heating device and the first auxiliary heating pipeline 13. The second valve 17 connects the outlet of domestic hot water and the second auxiliary heating pipeline 14. After the first auxiliary heating pipeline 13 and the second auxiliary heating pipeline 14 exchange heat in the third heat exchanger 15, the water after heat exchange in the second auxiliary heating pipeline 14 supplies domestic hot water, and the water after heat exchange in the first auxiliary heating pipeline 13 flows into the second heat exchanger 9 for combustion heating.

[0076] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A wall-mounted boiler, characterized in that: include: A first main heating pipeline (1) having a first inlet (2) and a first outlet (3); A second main heating pipeline (4) having a second inlet (5) and a second outlet (6); A heating device for heating the first main heating pipeline (1); a first heat exchanger for performing heat exchange between the second main heating pipeline (4) and the first main heating pipeline (1) heated by the heating device; a first auxiliary heating pipeline (13) having a third inlet and a third outlet, the third inlet being connected to a pipeline of the first main heating pipeline (1) located upstream of the first heat exchanger, and the third outlet being connected to a pipeline of the first main heating pipeline (1) located upstream of the heating device; The second auxiliary heating pipeline (14) has a fourth inlet and a fourth outlet, the fourth inlet is connected to the second inlet (5), and the fourth outlet is connected to the second outlet (6); The third heat exchanger (15) performs heat exchange between the first auxiliary heating pipeline (13) and the second auxiliary heating pipeline (14).

2. The wall-mounted boiler according to claim 1, characterized in that: The first heat exchanger is a phase change heat exchanger (8) comprising a phase change material, wherein the phase change material undergoes a phase change to perform heat exchange between the second main heating pipeline (4) and the first main heating pipeline (1) heated by the heating device.

3. The wall-mounted boiler according to claim 2, characterized in that: The phase change temperature of the phase change material is less than 70°C.

4. The wall-mounted boiler according to claim 3, characterized in that: The phase change temperature of the phase change material is 60°C.

5. The wall-mounted boiler according to claim 2, characterized in that: The phase change material is a solid-liquid phase change material.

6. The wall-mounted boiler according to any one of claims 1 to 5, characterized in that: The heating device includes a heater.

7. The wall-mounted boiler according to claim 6, characterized in that: The heater is a burner (7).

8. The wall-mounted boiler according to claim 6, characterized in that: The heating device further comprises a second heat exchanger (9), the second heat exchanger (9) comprising a heat exchange medium heated by the heater, and the first main heat supply pipeline (1) exchanges heat with the heated heat exchange medium.

9. The wall-mounted boiler according to any one of claims 1 to 5, characterized in that: Also includes a controller; The first main heat supply pipeline (1) is provided with a first temperature detection device (10) between the first heat exchanger and the heating device, and the first temperature detection device (10) is connected to the controller; The first main heat supply pipeline (1) is provided with a second temperature detection device (11) between the first heat exchanger and the first outlet (3), and the second temperature detection device (11) is connected to the controller; When the temperature difference between the first temperature detection device (10) and the second temperature detection device (11) is less than 2°C, the controller controls the heating device to stop working.

10. The wall-mounted boiler according to claim 9, characterized in that: When the temperature difference between the first temperature detection device (10) and the second temperature detection device (11) is greater than 15°C, or when the detection temperature of the second temperature detection device (11) is less than a preset heating temperature by 15°C, the controller controls the heating device to start working.

11. The wall-mounted boiler according to claim 9, characterized in that: The second main heat supply pipeline (4) is provided with a third temperature detection device (12) between the first heat exchanger and the second inlet (5), and the third temperature detection device (12) is connected to the controller; The second main heat supply pipeline (4) is provided with a flow regulating valve (21) between the first heat exchanger and the second outlet (6), and the flow regulating valve (21) is connected to the controller; The controller receives the temperature of the third temperature detection device (12) and controls the opening degree of the flow control valve (21).

12. The wall-mounted boiler according to claim 9, characterized in that: The first main heat supply pipeline (1) is provided with a first valve (16) between the first heat exchanger and the heating device, the first valve (16) is connected to the controller, and an auxiliary outlet end of the first valve (16) is connected to the third inlet.

13. The wall-mounted boiler according to claim 9, characterized in that: The second main heating pipeline (4) is provided with a second valve (17) between the second inlet (5) and the first heat exchanger, the second valve (17) is connected to the controller, and the auxiliary outlet end of the second valve (17) is connected to the fourth inlet.

14. The wall-mounted boiler according to claim 1, characterized in that: The first auxiliary heating pipeline (13) is provided with a water replenishment valve (18) between the third heat exchanger (15) and the third outlet, and the auxiliary end of the water replenishment valve (18) is connected to a pipeline of the second auxiliary heating pipeline (14) provided between the fourth inlet and the third heat exchanger (15).

15. The wall-mounted boiler according to any one of claims 1 to 5, characterized in that: It also comprises a water pressure balancing pipeline (19) connected to the first main heating pipeline (1), and an expansion water tank (20) is provided on the water pressure balancing pipeline (19).

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