Wall-mounted boiler

Abstract

The present invention relates to the field of electrical appliances, and in particular to a wall-mounted boiler. The wall-mounted boiler is provided with a second burner, a second heat exchanger, and a first three-way reversing valve provided on the heating water outlet pipeline is connected to the heating water outlet pipeline, and a second three-way reversing valve provided on the domestic water heating circuit is connected to the third heat exchanger. In the case of simultaneous heating and domestic water supply, the heating system is heated by the domestic water heating circuit when domestic water is not used, thereby improving the efficiency of the wall-mounted boiler.

Description

Technical Field

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

[0002] At present, most wall-mounted boilers are dual-purpose boilers, with heating function and domestic water function. Based on actual use needs, current wall-mounted boilers are mostly used with the principle of domestic water priority. When using the hot water function, the heating function will be stopped at the same time.

[0003] However, when people need both heating and hot water supply at the same time, especially when domestic water is used for a long time in winter, the water temperature in the heating pipe will drop, which will cause a large drop in indoor temperature and poor user experience. In response to this, a wall-mounted boiler disconnects the heating and domestic water systems, thereby achieving heating and domestic water supply at the same time to avoid mutual influence. However, when domestic water is not used, the domestic water system is idle, resulting in unnecessary energy loss. Summary of the invention

[0004] The main purpose of the present invention is to provide a wall-mounted boiler to solve the problem that the wall-mounted boiler in the prior art cannot provide both hot water supply and heating and has low working efficiency.

[0005] To achieve the above object, the present invention provides a wall-mounted boiler, comprising a heating water inlet pipeline, a heating water outlet pipeline, a domestic water inlet pipeline, a domestic water outlet pipeline and a domestic water heating circuit, and the wall-mounted boiler also includes:

[0006] a first heat exchanger and a first burner for supplying heat to the first heat exchanger, wherein the first heat exchanger is respectively connected to the heating water inlet pipeline and the heating water outlet pipeline;

[0007] a second heat exchanger and a second burner supplying heat to the second heat exchanger, the second heat exchanger being in communication with the domestic water heating circuit;

[0008] A third heat exchanger, the third heat exchanger comprising a first heat exchange channel connected to the domestic water heating circuit, and a second heat exchange channel connected to the domestic water inlet pipeline and the domestic water outlet pipeline, the third heat exchanger is used for heat exchange between the first heat exchange channel and the second heat exchange channel;

[0009] Among them, the domestic water heating circuit is connected to the heating water outlet pipeline through a first three-way reversing valve arranged on the heating water outlet pipeline, and the second three-way reversing valve arranged in the domestic water heating circuit is connected to the third heat exchanger.

[0010] Furthermore, the first heat exchanger is a first heater matched with the first burner; and the second heat exchanger is a second heater matched with the second burner.

[0011] Furthermore, the third heat exchanger is a plate heat exchanger.

[0012] Furthermore, the wall-mounted boiler also includes:

[0013] A first sectional valve is arranged upstream of the first burner, and the sectional valve allows the first burner to perform sectional combustion.

[0014] Furthermore, the wall-mounted boiler also includes: a second sectional valve arranged upstream of the second burner, and the sectional valve allows the second burner to burn in sections.

[0015] Furthermore, the wall-mounted boiler also includes: a gas proportional valve arranged upstream of the first sectional valve and the second sectional valve, for controlling the amount of gas entering the first sectional valve and the second sectional valve.

[0016] The technical solution of the present invention has the following advantages:

[0017] In the wall-mounted boiler provided by the present invention, a second burner and a second heat exchanger are added to the wall-mounted boiler, and the first three-way reversing valve arranged on the heating water outlet pipe is connected to the heating water outlet pipe, and a second three-way reversing valve arranged on the domestic water heating circuit is connected to the third heat exchanger to form a domestic water heating circuit. In this way, when heating and domestic water can be provided at the same time, the heating system is heated by the domestic water heating circuit without using domestic water, thereby improving the efficiency of the wall-mounted boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the specific implementation or the prior art description. Obviously, the drawings described below are some implementations of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 Schematic diagram of the main structure of the wall-mounted boiler in an embodiment of the present invention, wherein the wall-mounted boiler is in a single heating, high-power mode.

[0020] Figure 2 for Figure 1 The wall-mounted boiler shown is a schematic diagram of the main structure, in which the wall-mounted boiler is in a single heating, higher power mode.

[0021] Figure 3 for Figure 1 The wall-mounted boiler shown is a schematic diagram of the main structure, in which the wall-mounted boiler is in single heating, medium power mode.

[0022] Figure 4 for Figure 1 The wall-mounted boiler shown is a schematic diagram of the main structure, in which the wall-mounted boiler is in a single heating, low-power mode.

[0023] Figure 5 for Figure 1 The wall-mounted boiler shown is a schematic diagram of the main structure, in which the wall-mounted boiler is in single domestic water and high power mode.

[0024] Figure 6 for Figure 1 The wall-mounted boiler shown is a schematic diagram of the main structure, in which the wall-mounted boiler is in a heating and domestic water sharing mode.

[0025] Among them, the reference numerals in the above drawings are:

[0026] 1. Smoke hood; 3. Wind pressure switch; 6. First heat exchanger; 9. First burner; 12. First three-way reversing valve; 14. Gas proportional valve; 15. Heating water inlet pipeline; 16. First section valve; 19. Heating water outlet pipeline; 22. Second section valve; 23. Domestic water inlet pipeline; 24. Plate heat exchanger; 25. Domestic water outlet pipeline; 28. Second three-way reversing valve; 30. Second burner; 34. Second heat exchanger. DETAILED DESCRIPTION

[0027] 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.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] like Figures 1 to 6As shown, the wall-mounted boiler in this embodiment includes a heating water inlet pipeline 15, a heating water outlet pipeline 19, a domestic water inlet pipeline 23, a domestic water outlet pipeline 25 and a domestic water heating circuit, and the wall-mounted boiler also includes:

[0030] A first heat exchanger 6 and a first burner 9 for supplying heat to the first heat exchanger 6, wherein the first heat exchanger 6 is respectively connected to the heating water inlet pipeline 15 and the heating water outlet pipeline 19;

[0031] a second heat exchanger 34 and a second burner 30 for supplying heat to the second heat exchanger 34, wherein the second heat exchanger 34 is in communication with the domestic water heating circuit;

[0032] A third heat exchanger, the third heat exchanger comprising a first heat exchange channel connected to the domestic water heating circuit, and a second heat exchange channel connected to the domestic water inlet pipe 23 and the domestic water outlet pipe 25, the third heat exchanger is used for heat exchange between the first heat exchange channel and the second heat exchange channel;

[0033] The domestic water heating circuit is connected to the heating water outlet pipe 19 via a first three-way reversing valve 12 arranged on the heating water outlet pipe 19, and the second three-way reversing valve 28 arranged in the domestic water heating circuit is connected to the third heat exchanger.

[0034] Furthermore, the wall-mounted boiler in this embodiment is adopted, by adding a second burner 30 and a second heat exchanger 34 in the wall-mounted boiler, and connecting the first three-way reversing valve 12 arranged on the heating water outlet pipe 19 to the heating water outlet pipe 19, and connecting the second three-way reversing valve 28 arranged in the domestic water heating circuit to the third heat exchanger to form a domestic water heating circuit, so that when heating and domestic water can be provided at the same time, the heating system is heated by the domestic water heating circuit without using domestic water, thereby improving the efficiency of the wall-mounted boiler.

[0035] Specifically, in this embodiment, the first heat exchanger 6 is a first heater that cooperates with the first burner 9 ; the second heat exchanger 34 is a second heater that cooperates with the second burner 30 .

[0036] Specifically, the third heat exchanger is a plate heat exchanger 24 .

[0037] Preferably, the wall-mounted boiler in this embodiment further includes: a first sectional valve 16 disposed upstream of the first burner 9, and the sectional valve allows the first burner 9 to burn in sections. The wall-mounted boiler further includes: a second sectional valve 22 disposed upstream of the second burner 30, and the sectional valve allows the second burner 30 to burn in sections. This can further increase the power regulation ratio of the wall-mounted boiler and further improve the user experience.

[0038] Preferably, the wall-mounted boiler in this embodiment also includes: a gas proportional valve 14 arranged upstream of the first section valve 16 and the second section valve 22, for controlling the amount of gas entering the first section valve 16 and the second section valve 22, further improving the adjustable ratio of the wall-mounted boiler power.

[0039] See also Figures 1 to 5 The wall-mounted boiler in this embodiment includes two fans. The two fans can share a smoke hood 1 or use a separate smoke hood 1. The gas proportional valve 14 controls the opening and closing of the gas and the size of the gas flow rate. A fire detection needle and an ignition needle are installed above the burner fire row in each combustion system for ignition and detection of whether the ignition is successful. The water pump provides the power for water circulation, and the fan provides the air required for combustion and removes the smoke after combustion. The wind pressure switch 3 is used to detect whether the smoke channel is normal. The heating water outlet temperature sensor is used to detect the heating water outlet temperature, and the three-way motor is used to switch between domestic water and heating water. The plate heat exchanger 24 is used to heat domestic water. The domestic water temperature sensor is used to detect the hot water outlet temperature.

[0040] The working process of the wall-mounted boiler in this embodiment is described below in conjunction with the accompanying drawings:

[0041] like Figure 1 As shown, in the case of single heating mode of the wall-mounted boiler, running at high power: when the controller mainboard receives that the unit is running with a large load, the fan is started first, and when the wind pressure switch 3 detects the pressure difference signal generated by the fan airflow on the venturi tube, the signal is fed back to the controller mainboard, and then the pulse ignition device is ignited, and the gas proportional valve 14 is opened to deliver gas to the first segment valve 16 and the second segment valve 22. Then the segment valve solenoid valves are all opened to deliver gas to the two segment burners, and the first burner 9 and the second burner 30 start to burn. The heating water enters the first water pump from the heating return water port, exchanges heat through the first heat exchanger 6, then passes through the first three-way reversing valve 12, enters the second heat exchanger 34 through the second water pump for the second heat exchange, and then passes through the second three-way reversing valve 28 to the heating outlet and flows to the heating end, completing this heating cycle.

[0042] like Figure 2As shown, in the single heating mode of the wall-mounted boiler, when it is running at a higher power, when the controller mainboard receives that the unit is running at a large load, the fan is started first, and when the wind pressure switch 3 detects the pressure difference signal generated by the fan airflow on the venturi tube, the signal is fed back to the controller mainboard, and then the pulse ignition device is ignited, and the gas proportional valve 14 is opened to deliver gas to the first segment valve 16 and the second segment valve 22. Then, except for the second segment valve 22, all the segment valve solenoid valves are opened to deliver gas to the two segment burners, and the first burner 9 and the right part of the second burner 30 begin to burn. The heating water enters the first water pump from the heating return water port, exchanges heat through the first heat exchanger 6, then passes through the first three-way reversing valve 12, enters the second heat exchanger 34 through the second water pump for the second heat exchange, and then passes through the second three-way reversing valve 28 to the heating outlet and flows to the heating end, completing this heating cycle.

[0043] like Figure 3 As shown, in the single heating mode of the wall-mounted boiler, when it is running at medium power, when the controller mainboard receives that the unit operating load is small, the fan is started first, and when the wind pressure switch 3 detects the pressure difference signal generated by the fan airflow on the venturi tube, the signal is fed back to the controller mainboard, and then the pulse ignition device is ignited, and the gas proportional valve 14 is opened to deliver gas to the first section valve 16. Then the solenoid valve of the first section valve 16 is opened to deliver gas to the first burner 9, and the first burner 9 starts to burn. The heating water enters the first water pump from the heating return water port, exchanges heat through the first heat exchanger 6, and then passes through the first three-way reversing valve 12 to the heating water outlet and flows to the heating end, completing this heating cycle.

[0044] like Figure 4 As shown, in the single heating mode of the wall-mounted boiler, when it is running at low power, when the controller mainboard receives that the unit operating load is small, the fan is started first, and when the wind pressure switch 3 detects the pressure difference signal generated by the fan airflow on the venturi tube, the signal is fed back to the controller mainboard, and then the pulse ignition device is ignited, and the gas proportional valve 14 is opened to deliver gas to the first section valve 16. Then the first section valve 16 is opened to deliver gas to the right side of the first burner 9, and the right side of the first burner 9 starts to burn. The heating water enters the first water pump from the heating return water port, exchanges heat through the first heat exchanger 6, and then passes through the first three-way reversing valve 12 to the heating water outlet and flows to the heating end, completing this heating cycle.

[0045] like Figure 5As shown, in the single domestic water mode of the wall-mounted boiler, when it runs at high power: when the controller mainboard receives the domestic water demand fed back by the water flow sensor and the unit is running under a large load, the fan is started first, and when the wind pressure switch 3 detects the pressure difference signal generated by the fan airflow on the venturi tube, the signal is fed back to the controller mainboard, and then the pulse ignition device is ignited, and the gas proportional valve 14 is opened to deliver gas to the second segment valve 22. Then the second segment valve 22 is opened to deliver gas to the second burner 30, and the second burner 30 side starts to burn. The heating water starts to enter the second heat exchanger 34 from the second water pump for heat exchange, and then enters the plate heat exchanger 24 through the second three-way reversing valve 28. After the plate heat exchanger 24 exchanges heat with domestic water, it returns to the second water pump for circulation. The domestic water enters from the domestic water inlet, and after the plate heat exchanger 24 exchanges heat, it reaches the set temperature, and exits from the domestic water outlet to reach the end of the domestic water; when the power demand for domestic water is small, only the second segment valve 22 is opened.

[0046] like Figure 6 As shown, in the mode of using the wall-mounted boiler for heating and domestic water at the same time, when the controller mainboard receives the signal that the unit needs to be used for heating and domestic water at the same time, the fan is started first, and when the wind pressure switch 3 detects the pressure difference signal generated by the fan airflow on the venturi tube, the signal is fed back to the controller mainboard, and then the pulse ignition device is ignited, and the gas proportional valve 14 is opened to deliver gas to the first segment valve 16 and the second segment valve 22. Then the segment valve solenoid valves are all opened to deliver gas to the two segment burners, and the first burner 9 and the second burner 30 start to burn. At this time, the first three-way reversing valve 12 is closed. The heating water starts to enter the second heat exchanger 34 from the second water pump for heat exchange, and then enters the plate heat exchanger 24 through the second three-way reversing valve 28. After the plate heat exchanger 24 exchanges heat with domestic water, it returns to the second water pump for circulation. Domestic water enters from the domestic water inlet, and after heat exchange in the plate heat exchanger 24, reaches the set temperature, and then flows out from the domestic water outlet to the domestic water terminal; the heating return water enters the first water pump, passes through the first heat exchanger 6 for heat exchange, and then passes through the first three-way reversing valve 12 to the heating water outlet and flows to the heating terminal, so that the heating mode and the domestic water mode are turned on at the same time.

[0047] 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: The wall-mounted boiler comprises a heating water inlet pipeline (15), a heating water outlet pipeline (19), a domestic water inlet pipeline (23), a domestic water outlet pipeline (25) and a domestic water heating circuit, and the wall-mounted boiler also comprises: A first heat exchanger (6) and a first burner (9) for supplying heat to the first heat exchanger (6), wherein the first heat exchanger (6) is respectively connected to the heating water inlet pipeline (15) and the heating water outlet pipeline (19); a second heat exchanger (34) and a second burner (30) for supplying heat to the second heat exchanger (34), wherein the second heat exchanger (34) is connected to the domestic water heating circuit; a third heat exchanger, the third heat exchanger comprising a first heat exchange channel connected to the domestic water heating circuit, and a second heat exchange channel connected to the domestic water inlet pipeline (23) and the domestic water outlet pipeline (25), the third heat exchanger being used for heat exchange between the first heat exchange channel and the second heat exchange channel; The domestic water heating circuit is connected to the heating water outlet pipeline (19) via a first three-way reversing valve (12) arranged on the heating water outlet pipeline (19), and the second three-way reversing valve (28) arranged on the domestic water heating circuit is connected to the third heat exchanger.

2. The wall-mounted boiler according to claim 1, characterized in that: The first heat exchanger (6) is a first heater matched with the first burner (9); the second heat exchanger (34) is a second heater matched with the second burner (30).

3. The wall-mounted boiler according to claim 1, characterized in that: The third heat exchanger is a plate heat exchanger (24).

4. The wall-mounted boiler according to any one of claims 1 to 3, characterized in that: The wall-mounted boiler also includes: A first segmented valve (16) is arranged upstream of the first burner (9), and the segmented valve allows the first burner (9) to perform segmented combustion.

5. The wall-mounted boiler according to claim 4, characterized in that: The wall-mounted boiler further comprises: a second segmented valve (22) arranged upstream of the second burner (30), wherein the segmented valve allows the second burner (30) to perform segmented combustion.

6. The wall-mounted boiler according to claim 5, characterized in that: The wall-mounted boiler also includes: a gas proportional valve (14) arranged upstream of the first sectional valve (16) and the second sectional valve (22), for controlling the amount of gas entering the first sectional valve (16) and the second sectional valve (22).

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