A high-efficiency and energy-saving small household boiler

Abstract

This utility model discloses a high-efficiency and energy-saving household boiler, including a shell, a combustion chamber, a flue, an exhaust pipe, a water inlet pipe, and a heat exchange pipe. The combustion chamber and the flue are integrally formed and fixedly installed inside the shell. The bottom end of the exhaust pipe penetrates and is fixed inside the shell, communicating and fixedly connected to the flue. This utility model utilizes the heat exchange pipe to absorb heat from combustion as water flows through it, raising its temperature and outputting hot water. The residual heat of the flue gas is discharged into the exhaust pipe along the flue and eventually exited. As the residual heat of the flue gas passes through the exhaust pipe, the water in the inlet pipe absorbs this residual heat through spiral heat exchange plates. This fully utilizes the residual heat of the flue gas while increasing the temperature of the input water, allowing it to heat up faster when entering the heat exchange pipe. Therefore, the device achieves the advantages of high heating efficiency, improved utilization of residual flue gas heat, and reduced energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of household small boilers, and more specifically, to a high-efficiency and energy-saving household small boiler. Background Technology

[0002] A household boiler refers to a domestic boiler used for heating or bathing in a home. It is small in size, low in energy consumption, and typically suitable for family use. Household boilers are mainly of two types: wall-mounted boilers and floor-standing boilers. Wall-mounted gas boilers are used in ordinary residences and apartments, using natural gas, liquefied petroleum gas, or coal gas as fuel. They provide both heating and sufficient domestic hot water. The power of a wall-mounted boiler is generally 18-35KW, with dual functions of heating and domestic hot water. When selecting a boiler, the heating area and hot water consumption of the house should be considered. Typically, 100W / ㎡ is chosen for heating, but most families should ensure that one shower and one kitchen hot water tap are used simultaneously in winter.

[0003] Current household wall-mounted gas boilers generally only exchange heat inside the combustion chamber, while the flue gas produced by combustion is directly discharged along the exhaust structure. The residual heat in the flue gas is difficult to utilize, resulting in energy waste. In addition, cold water directly enters the heat exchange structure, resulting in a slow heating rate. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a high-efficiency and energy-saving household small boiler.

[0005] To solve the above problems, the present invention adopts the following technical solution;

[0006] A high-efficiency and energy-saving household boiler includes a shell, a combustion chamber, a flue, an exhaust pipe, a water inlet pipe, and a heat exchange pipe. The combustion chamber and the flue are integrally formed and fixedly installed inside the shell. The bottom end of the exhaust pipe passes through and is fixedly installed inside the shell, communicating and fixedly connected to the flue. The heat exchange pipe is fixedly installed inside the combustion chamber. One end of the water inlet pipe passes through the exhaust pipe into the shell and is fixedly connected to the left end of the heat exchange pipe. The other end of the heat exchange pipe is provided with a drain pipe, which passes downward through and is fixed to the bottom of the shell. An air inlet valve pipe for injecting gas is fixedly installed at the bottom of the shell, and the top end of the air inlet valve pipe passes through and is fixed to the inside of the combustion chamber. An igniter is fixedly installed on one side of the combustion chamber. A spiral heat exchange plate is provided on the outer side of a section of the water inlet pipe inside the exhaust pipe. The spiral heat exchange plate guides the combustion flue gas spirally along the outer side of the water inlet pipe until it is discharged. A controller for controlling the igniter and setting the temperature is installed on the front of the shell.

[0007] As a further description of the above technical solution: the heat exchange tube has four horizontally arranged inner cavities, and the heat exchange tube has fins arranged at equal intervals on its outer side.

[0008] As a further description of the above technical solution: a check valve is provided on the outside of the intake valve pipe.

[0009] As a further description of the above technical solution: the water inlet pipe is an integrally formed copper pipe, and a connector for connecting an external water pipe is fixedly connected to one end of the water inlet pipe located outside the exhaust pipe.

[0010] As a further description of the above technical solution: the inner side of the shell is provided with a heat insulation layer.

[0011] As a further description of the above technical solution: the outer side of the housing is provided with two sets of connecting lugs with threaded holes.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] This solution preheats the front section of the water inlet pipe by setting up spiral heat exchange plates inside the flue pipe, while utilizing the residual heat in the flue gas to improve energy utilization and reduce energy consumption, thereby improving the heating efficiency of the water flow. As a result, the device has the advantages of high heating efficiency, improved utilization of residual heat in flue gas, and reduced energy consumption. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a frontal cross-sectional view of the present invention.

[0016] Figure 3 for Figure 2 Enlarged schematic diagram of section A in the middle;

[0017] Figure 4 This is a partial side view sectional structural diagram of the present invention.

[0018] Explanation of the labels in the diagram:

[0019] 1. Shell; 2. Combustion chamber; 3. Flue; 4. Exhaust pipe; 5. Water inlet pipe; 51. Connector; 6. Heat exchange tube; 61. Inner cavity; 62. Fins; 7. Drainage pipe; 8. Inlet valve pipe; 81. Check valve; 9. Igniter; 10. Spiral heat exchange plate; 11. Thermal insulation layer; 12. Connecting lug; 13. Controller. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0021] Please see Figures 1-4 This utility model discloses a high-efficiency and energy-saving household boiler, comprising a shell 1, a combustion chamber 2, a flue 3, an exhaust pipe 4, a water inlet pipe 5, and a heat exchange pipe 6. The combustion chamber 2 and the flue 3 are integrally formed and fixedly installed inside the shell 1. The bottom end of the exhaust pipe 4 passes through and is fixed inside the shell 1, communicating and fixedly connected to the flue 3. The heat exchange pipe 6 is fixedly installed inside the combustion chamber 2. One end of the water inlet pipe 5 passes through the exhaust pipe 4 into the shell 1 and is fixedly connected to the left end of the heat exchange pipe 6. The other end of the heat exchange pipe 6 is... There is a drain pipe 7, which extends downward and is fixed to the bottom of the housing 1. An air inlet valve pipe 8 for injecting gas is fixedly installed at the bottom of the housing 1. The top end of the air inlet valve pipe 8 extends through and is fixed to the inside of the combustion chamber 2. An igniter 9 is fixedly installed on one side of the combustion chamber 2. A spiral heat exchange plate 10 is provided on the outer side of a section of the water inlet pipe 5 inside the exhaust pipe 4. The spiral heat exchange plate 10 guides the combustion flue gas spirally along the outer side of the water inlet pipe 5 until it is discharged. A controller 13 for controlling the igniter 9 and setting the temperature is installed on the front of the housing 1.

[0022] In this invention, the shell 1 serves as the boiler outer shell. The air inlet valve pipe 8 is connected to the natural gas pipeline, and the water inlet pipe 5 connects to the tap water pipeline at its inlet end and to the indoor water pipeline at its outlet end. After connection, the controller 13 sets the output temperature, then the air inlet valve pipe 8 is opened to input natural gas, and the igniter 9 is activated to ignite the natural gas for continuous combustion. Simultaneously, the water inlet pipe 5 is opened to input tap water. As the water flows through the heat exchange pipe 6, it absorbs the heat from combustion to raise its temperature and output hot water. The flue gas, still carrying residual heat, is discharged along the flue 3 into the exhaust pipe 4 and finally discharged. The residual heat of the flue gas, after passing through the exhaust pipe 4, further enhances its heat-generating properties. At the same time, the water flowing inside the inlet pipe 5 absorbs the residual heat of the flue gas through the spiral heat exchange plate 10, making full use of the residual heat of the flue gas while increasing the temperature of the input water flow, so that it heats up faster when entering the heat exchange pipe 6. Thus, the device has the advantages of high heating efficiency, improved utilization rate of residual heat of flue gas, and reduced energy consumption. It solves the problems of existing household wall-mounted gas boilers, which generally only carry out heat exchange inside the combustion chamber, while the flue gas generated by combustion is directly discharged along the exhaust structure, making it difficult to utilize the residual heat of the flue gas and causing energy waste. In addition, cold water directly enters the heat exchange structure, resulting in a slow heating rate.

[0023] Please see Figure 3 and Figure 4 The heat exchange tube 6 has four horizontally arranged inner cavities 61, and the heat exchange tube 6 has fins 62 arranged at equal intervals on its outer side.

[0024] In this invention, the water flow inside the inlet pipe 5 is diverted through four inner cavities 61, and the heat exchange efficiency is improved in conjunction with the fins 62.

[0025] Please see Figure 2 Among them, a check valve 81 is provided on the outside of the intake valve pipe 8.

[0026] In this invention, the check valve 81 prevents backflow from the intake valve pipe 8, thereby improving equipment safety.

[0027] Please see Figure 1 and Figure 2 Among them, the water inlet pipe 5 is a one-piece molded copper pipe, and the end of the water inlet pipe 5 located outside the exhaust pipe 4 is fixedly connected to a connector 51 for connecting to an external water pipe.

[0028] In this invention, the heat exchange efficiency of flue gas preheating is increased by using a copper water inlet pipe 5, and an external water pipe is easily connected by a connector 51.

[0029] Please see Figure 2 The inner side of the shell 1 is provided with a heat insulation layer 11.

[0030] In this invention, the heat insulation layer 11 reduces internal heat loss, improves heat utilization, and reduces energy consumption.

[0031] Please see Figure 1 and Figure 2 Among them, the outer side of the housing 1 is provided with two sets of connecting ear plates 12 with threaded holes.

[0032] In this utility model, the connecting ear plate 12 facilitates the wall-mounted installation of the housing 1 on the wall.

[0033] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A high-efficiency and energy-saving small household boiler, characterized in that: The system includes a shell (1), a combustion chamber (2), a flue (3), an exhaust pipe (4), a water inlet pipe (5), and a heat exchange pipe (6). The combustion chamber (2) and the flue (3) are integrally formed and fixedly installed inside the shell (1). The bottom end of the exhaust pipe (4) passes through and is fixed inside the shell (1) and communicates with and is fixed to the flue (3). The heat exchange pipe (6) is fixedly installed inside the combustion chamber (2). One end of the water inlet pipe (5) passes through the exhaust pipe (4) into the shell (1) and is fixedly connected to the left end of the heat exchange pipe (6). The other end of the heat exchange pipe (6) is provided with a drain pipe (7). The drain pipe (7) extends downward and is fixed to the bottom of the housing (1). An air inlet valve pipe (8) for injecting gas is fixedly installed at the bottom of the housing (1). The top of the air inlet valve pipe (8) extends downward and is fixed to the inside of the combustion chamber (2). An igniter (9) is fixedly installed on one side of the combustion chamber (2). A spiral heat exchange plate (10) is provided on the outer side of a section inside the exhaust pipe (4) of the water inlet pipe (5). The spiral heat exchange plate (10) guides the flue gas along the outer side of the water inlet pipe (5) until it is discharged. A controller (13) for controlling the igniter (9) and setting the temperature is installed on the front of the housing (1).

2. The high-efficiency, energy-saving, domestic, small boiler according to claim 1, characterized in that: The heat exchange tube (6) has four horizontally arranged inner cavities (61) inside, and fins (62) arranged at equal intervals on the outside of the heat exchange tube (6).

3. The high-efficiency, energy-saving, domestic, small boiler according to claim 1, characterized in that: A check valve (81) is provided on the outside of the intake valve pipe (8).

4. The high-efficiency, energy-saving, domestic, small boiler according to claim 1, characterized in that: The water inlet pipe (5) is an integrally formed copper pipe, and a connector (51) for connecting to an external water pipe is fixedly connected to one end of the water inlet pipe (5) located outside the flue pipe (4).

5. The energy efficient small domestic boiler as claimed in claim 1, wherein: The inner side of the housing (1) is provided with a heat insulation layer (11).

6. The high-efficiency, energy-saving, home small boiler according to claim 1, characterized in that: The outer side of the housing (1) is provided with two sets of connecting lugs (12) with threaded holes.

Images