Wall-hung boiler with built-in coupling tank

Abstract

The utility model relates to a kind of wall-hanging stove of built-in coupling tank, including shell, gas wall-hanging stove combustion system and gas proportional valve, its characteristics are the inlet of electric three-way valve and the water outlet of gas wall-hanging stove combustion system are communicated;The first side water inlet of coupling tank is communicated with the second outlet of electric three-way valve, the b mouth of plate heat exchanger and the first side water outlet of coupling tank are communicated with the inlet of first water pump respectively, the water inlet of gas wall-hanging stove combustion system is communicated with the outlet of first water pump;The second side water outlet of coupling tank is communicated with the inlet of second water pump, the outlet of second water pump is communicated with heating water outlet end, and the flow of second water pump is greater than the flow of first water pump.Its advantage is that backwater temperature is guaranteed, and the service life of wall-hanging stove is long;Large-scale wall-hanging stove heating is used, and the problem of insufficient end heat dissipation and room not hot is avoided.

Description

Technical Field

[0001] This utility model relates to a wall-hung boiler with a built-in coupling tank. Background Technology

[0002] Currently, gas-fired wall-hung boilers have the following defects in the heating return water process: First, excessively low return water temperature leads to low-temperature corrosion, severely shortening the boiler's lifespan. The principle is as follows: Natural gas combustion produces a large amount of water vapor. When the return water temperature is too low, causing the boiler heat exchanger wall temperature to drop below the flue gas's dew point temperature (approximately 55-60°C), the water vapor condenses on the heat exchanger surface. This condensate is not pure water; instead, it combines with carbon dioxide, sulfides, and other substances in the flue gas to form carbonic acid and sulfuric acid. This acidic liquid severely corrodes the metal tube walls of the heat exchanger (especially ordinary steel or copper heat exchangers), eventually causing perforation and leakage, rendering the boiler unusable. This is irreversible damage.

[0003] Secondly, when dealing with large apartments, it is easy to encounter... Insufficient heat dissipation at the terminal, resulting in a room that is not hot and a hydraulic imbalance. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a wall-hung boiler with a built-in coupling tank, which ensures the return water temperature and extends the service life of the boiler. For large apartments, using a wall-hung boiler for heating avoids the problem of insufficient heat dissipation at the terminal and insufficient room temperature.

[0005] To achieve the above objectives, this utility model provides a wall-hung boiler with a built-in coupling tank, comprising a shell, a gas-fired boiler combustion system, and a gas proportional valve. The gas is connected to the gas-fired boiler combustion system via the gas proportional valve. The invention is characterized by further comprising... The system includes an electric three-way valve, a plate heat exchanger, and a water flow sensor. The inlet of the electric three-way valve is connected to the outlet of the gas boiler combustion system, and the first outlet of the electric three-way valve is connected to port a of the plate heat exchanger. Port a of the plate heat exchanger is connected to port b, port c is connected to port d, port c of the plate heat exchanger is connected to the hot water end of the bathroom, port d of the plate heat exchanger is connected to the water flow sensor, and the water flow sensor is connected to an external water source. The system comprises a coupling tank, a first water pump, and a second water pump. The primary inlet of the coupling tank is connected to the second outlet of an electric three-way valve. The inlet of the first water pump is connected to port b of the plate heat exchanger and the primary outlet of the coupling tank. The outlet of the first water pump is connected to the inlet of the gas boiler combustion system. The inlet of the second water pump is connected to the secondary outlet of the coupling tank. The outlet of the second water pump is connected to the heating water outlet. The flow rate of the second water pump is greater than that of the first water pump. The secondary inlet of the coupling tank is connected to the heating return water outlet. The gas boiler combustion system, gas proportional valve, electric three-way valve, plate heat exchanger, water flow sensor coupling tank, first water pump, and second water pump are all housed within the casing.

[0006] In this embodiment, an expansion tank and a water supply valve are also included. The expansion tank is connected to the interface of the coupling tank and the water supply valve, respectively. The water supply valve is connected to the water flow sensor. The expansion tank and the water supply valve are located inside the housing.

[0007] The advantages of this invention compared to existing technologies are: the return water temperature is guaranteed, and the service life of the wall-hung boiler is long; for large apartments using wall-hung boilers for heating, the problem of insufficient heat dissipation at the terminal and insufficient room temperature is avoided. Attached Figure Description

[0008] Figure 1 This is a structural diagram of the present invention. Detailed Implementation

[0009] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0010] In the description of this utility model, the terms "upper", "lower", "inner" and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0011] In this utility model, unless otherwise explicitly specified and limited, the term "set" and other terms should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or a detachable arrangement or an integral part; it can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0012] like Figure 1 As shown, it is a wall-hung boiler with a built-in coupling tank, including a shell, a gas wall-hung boiler combustion system 1, and a gas proportional valve 2. The gas is connected to the gas wall-hung boiler combustion system 1 through the gas proportional valve 2. Its characteristic is that it also includes... The system includes an electric three-way valve 5, a plate heat exchanger 6, and a water flow sensor 10. The inlet of the electric three-way valve 5 is connected to the outlet of the gas boiler combustion system 1, and the first outlet of the electric three-way valve 5 is connected to port a of the plate heat exchanger 6. Port a of the plate heat exchanger 6 is connected to port b, port c is connected to port d, port c of the plate heat exchanger 6 is connected to the hot water end of the bathroom, port d of the plate heat exchanger is connected to the water flow sensor 10, and the water flow sensor 10 is connected to an external water source. The system comprises a coupling tank 8, a first water pump 7, and a second water pump 9. The primary inlet 81 of the coupling tank is connected to the second outlet of the electric three-way valve 5. The inlet of the first water pump 7 is connected to both port b of the plate heat exchanger 6 and the primary outlet 82 of the coupling tank 8. The outlet of the first water pump 7 is connected to the inlet of the gas boiler combustion system 1. The inlet of the second water pump 9 is connected to the secondary outlet 83 of the coupling tank 8. The outlet of the second water pump 9 is connected to the heating water outlet. The flow rate of the second water pump 9 is greater than that of the first water pump 7. The secondary inlet 84 of the coupling tank 8 is connected to the heating return water outlet. The gas boiler combustion system 1, gas proportional valve 2, electric three-way valve 5, plate heat exchanger 6, water flow sensor 10, coupling tank 8, first water pump 7, and second water pump 9 are all housed within a casing. Both the first water pump 7 and the second water pump 9 are equipped with vent valves.

[0013] When using a wall-mounted boiler for heating, there is an internal circulation water circuit (heating water circuit) and an external circulation water circuit (heating water circuit). The first outlet of the electric three-way valve 5 is closed, and the second outlet of the electric three-way valve 5 is open. The water flow direction of the internal circulation water circuit is as follows: after the gas wall-hung boiler combustion system 1 heats the water, it enters the primary side inlet 81 of the coupling tank 8 through the electric three-way valve 5, and then enters the first water pump 7 through the primary side outlet 82 of the coupling tank 8, and finally returns to the gas wall-hung boiler combustion system 1 to achieve one internal circulation. The flow direction of the external circulation water circuit is as follows: the heating return water enters the coupling tank 8 from the secondary side inlet 84, and then passes through the secondary side outlet 83 of the coupling tank 8 and the second water pump 9 to supply heating water to the outside. The flow rate of the second water pump 9 is greater than that of the first water pump 7, resulting in a greater flow rate in the external circulation water path than in the internal circulation water path. This allows the heat from the internal circulation water path to be carried out by the external circulation water path more quickly. Furthermore, due to the faster flow rate, large apartments avoid the problem of insufficient heat dissipation at the terminal and insufficient room temperature. The return water temperature is guaranteed, and the service life of the wall-hung boiler is extended.

[0014] In this embodiment, an expansion tank 3 and a water supply valve 11 are also included. The expansion tank 3 is connected to the interface 85 of the coupling tank 8 and the water supply valve 11, respectively. The water supply valve 11 is connected to the water flow sensor 10. The expansion tank 3 and the water supply valve 11 are located inside the housing.

[0015] When water is heated, its volume expands. The expansion tank 3 relieves system pressure by storing this "extra" water. When the water cools and contracts, the expansion tank 3 can replenish the water volume. The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A wall-hung boiler with a built-in coupling tank, comprising a shell, a gas-fired boiler combustion system (1), and a gas proportional valve (2), wherein the gas is connected to the gas-fired boiler combustion system (1) through the gas proportional valve (2), characterized in that... Also includes Electric three-way valve (5), plate heat exchanger (6) and water flow sensor (10); the inlet of the electric three-way valve (5) is connected to the outlet of the gas wall-hung boiler combustion system (1), the first outlet of the electric three-way valve (5) is connected to port a of the plate heat exchanger (6); port a of the plate heat exchanger (6) is connected to port b, port c is connected to port d, port c of the plate heat exchanger (6) is connected to the hot water end of the bathroom, port d of the plate heat exchanger is connected to the water flow sensor (10), and the water flow sensor (10) is connected to the external water source; The coupling tank (8), the first water pump (7), and the second water pump (9) are configured. The primary side inlet (81) of the coupling tank is connected to the second outlet of the electric three-way valve (5). The inlet of the first water pump (7) is connected to the b port of the plate heat exchanger (6) and the primary side outlet (82) of the coupling tank (8). The outlet of the first water pump (7) is connected to the inlet of the gas-fired wall-mounted boiler combustion system (1). The inlet of the second water pump (9) is connected to the secondary side outlet of the coupling tank (8). The outlet (83) of the second water pump (9) is connected to the heating water outlet, and the flow rate of the second water pump (9) is greater than that of the first water pump (7); the secondary side inlet (84) of the coupling tank (8) is connected to the heating return water outlet; the gas wall-hung boiler combustion system (1), gas proportional valve (2), electric three-way valve (5), plate heat exchanger (6), water flow sensor (10), coupling tank (8), first water pump (7) and second water pump (9) are all located inside the housing.

2. The wall-hung boiler with built-in coupling tank according to claim 1, characterized in that... It also includes an expansion tank (3) and a water supply valve (11). The expansion tank (3) is connected to the interface (85) of the coupling tank (8) and the water supply valve (11). The water supply valve (11) is connected to the water flow sensor (10). The expansion tank (3) and the water supply valve (11) are located inside the housing.

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