Efficient energy-saving condensation type heat exchanger of water heater

Abstract

The utility model discloses an efficient energy-saving condensation type heat exchanger of a water heater, which comprises a shell, a flue gas inlet is arranged on one side of a bottom plate of the shell, a flue gas outlet is arranged at the top of the shell, a plurality of heat exchange tubes are arranged in the shell, a flow guide plate is arranged in the shell, and the flow guide plate is arranged in the shell. The guide plate upwards bypasses the heat exchange tube from one side, close to the flue gas inlet, of the heat exchange tube and then extends towards the bottom plate, a gap is formed between the end part of the guide plate and the bottom plate, and flue gas enters the shell from the flue gas inlet, flows through the heat exchange tube and the gap and is finally discharged from the flue gas outlet. According to the condensation type heat exchanger, high-temperature flue gas entering the shell can be guided through the flow guide plate, water in the heat exchange pipe is heated when the high-temperature flue gas flows through the heat exchange pipe, heat energy of the high-temperature flue gas is effectively utilized, and therefore the heat exchange efficiency of the condensation type heat exchanger is improved, and energy consumption of the gas water heater is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a high-efficiency energy-saving condensing heat exchanger for water heaters. Background Art

[0002] During the use of gas water heaters, high-temperature flue gas is generated. Currently, the high-temperature flue gas is directly discharged into the outside air without utilizing the heat energy of the high-temperature flue gas, resulting in a waste of energy consumption of the water heater. Utility Model Content

[0003] The utility model provides a high-efficiency and energy-saving condensing heat exchanger for a water heater, which can solve the problem that the existing condensing heat exchanger cannot utilize the heat energy of high-temperature flue gas.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-efficiency and energy-saving condensing heat exchanger for a water heater, comprising a shell, a flue gas inlet is provided on one side of the bottom plate of the shell, a flue gas outlet is installed on the top of the shell, a plurality of heat exchange tubes are installed inside the shell, a guide plate is installed inside the shell, the guide plate is upward from the side of the heat exchange tube close to the flue gas inlet, bypasses the heat exchange tube and then extends to the bottom plate, a gap is provided between the end of the guide plate and the bottom plate, the flue gas enters the shell from the flue gas inlet and flows through the heat exchange tube and the gap, and is finally discharged from the flue gas outlet, and the high-temperature flue gas entering the shell can be guided by providing the guide plate, and the high-temperature flue gas heats the water in the heat exchange tube when flowing through the heat exchange tube, effectively utilizing the thermal energy of the high-temperature flue gas, thereby improving the heat exchange efficiency of the condensing heat exchanger and reducing the energy consumption of the gas water heater.

[0005] Preferably, the bottom plate is inclined, the flue gas inlet is arranged at the top of the bottom plate, a drainage pipe is installed at the bottom of the bottom plate, and the upper side of the bottom plate can collect the condensed water generated on the surface of the heat exchange tube and discharge it through the drainage pipe.

[0006] Preferably, a liquid level sensor is installed on one side of the shell near the lower part of the bottom plate. When the condensed water in the shell exceeds a certain water level, the liquid level sensor can cut off the water heater in time to prevent the condensed water from flowing back into the water heater and protect the user's safety.

[0007] Preferably, a temperature sensor is also installed on the side wall of the shell, which can cut off the water heater from continuing to work when the temperature inside the shell is too high, thereby protecting the user's safety.

[0008] Preferably, the guide plate includes a guide side plate installed on the side close to the flue gas inlet and a guide top plate installed on the upper side of the heat exchange tube. One side of the guide top plate is connected to the guide side plate, which is convenient for setting the position and angle of the guide plate. The guide top plate can be replaced as needed.

[0009] Preferably, a water inlet integrated plate and a water outlet integrated plate are installed on the inner side of one side wall of the shell, one end of the heat exchange tube is connected to the water inlet integrated plate, and the other end of the heat exchange tube is connected to the water outlet integrated plate. A water inlet pipe connected to the water inlet integrated plate and a water outlet pipe connected to the water outlet integrated plate are provided on the outer side of the side wall of the shell. The heat exchange tube is S-shaped, and water can be centrally supplied and discharged to the heat exchange tube through the water inlet integrated plate and the water outlet integrated plate, which is easy to install.

[0010] Preferably, an anti-backdraft piece is installed inside the smoke outlet to prevent backdraft from blowing into the water heater.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The structure is simple. The flue gas enters the shell from the flue gas inlet and flows through the heat exchange tube and the gap, and is finally discharged from the flue gas outlet. The high-temperature flue gas entering the shell can be guided by setting a guide plate. When the high-temperature flue gas flows through the heat exchange tube, the water in the heat exchange tube is heated, which effectively utilizes the thermal energy of the high-temperature flue gas, thereby improving the heat exchange efficiency of the condensing heat exchanger and reducing the energy consumption of the gas water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a first-perspective stereogram of the present invention;

[0014] Figure 2 This is a second perspective stereogram of the present invention;

[0015] Figure 3 This is a side sectional structural diagram of the utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the utility model after removing the top plate and the smoke outlet. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] like Figure 1-4As shown, the utility model provides a high-efficiency and energy-saving condensing heat exchanger for a water heater, comprising a shell 1, a flue gas inlet 3 is provided on one side of the bottom plate 8 of the shell 1, a flue gas outlet 2 is installed on the top of the shell 1, a plurality of heat exchange tubes 9 are installed inside the shell 1, and a guide plate is installed inside the shell 1, the guide plate goes upward from the side of the heat exchange tube 9 close to the flue gas inlet 3, bypasses the heat exchange tube 9 and then extends to the bottom plate 8, a gap 6 is provided between the end of the guide plate and the bottom plate 8, the flue gas enters the shell 1 from the flue gas inlet 3 and flows through the heat exchange tube 9 and the gap 6, and is finally discharged from the flue gas outlet 2. By providing the guide plate, the high-temperature flue gas entering the shell 1 can be guided, and the high-temperature flue gas heats the water in the heat exchange tube 9 when it flows through the heat exchange tube 9, effectively utilizing the thermal energy of the high-temperature flue gas, thereby improving the heat exchange efficiency of the condensing heat exchanger and reducing the energy consumption of the gas water heater.

[0019] Specifically, the condensing heat exchanger is installed on the top of the water heater, and the flue gas inlet 3 can be set in a long strip shape and connected to the smoke exhaust port of the water heater, wherein the bottom plate 8 is inclined, and the flue gas inlet 3 is set at the high part of the bottom plate 8. A drain pipe 15 is installed at the low part of the bottom plate 8. The upper side of the bottom plate 8 can collect the condensed water generated on the surface of the heat exchange tube 9 and discharge it through the drain pipe 15.

[0020] In order to ensure the safety of use, a liquid level sensor 14 is installed on one side of the shell 1 near the lower part of the bottom plate 8. When the condensed water in the shell 1 exceeds a certain water level, the liquid level sensor 14 can cut off the operation of the water heater in time to prevent the condensed water from flowing back into the water heater and protect the user's safety.

[0021] like Figure 1-2 As shown, a temperature sensor 7 is also installed on the side wall of the shell 1. When the temperature inside the shell 1 is too high, the water heater can be cut off from continuing to work, protecting the user's safety.

[0022] In this embodiment, if Figure 3 As shown, the guide plate includes a guide side plate 4 installed on the side close to the flue gas inlet 3 and a guide top plate 5 installed on the upper side of the heat exchange tube 9. One side of the guide top plate 5 is connected to the guide side plate 4, which is convenient for setting the position and angle of the guide plate. The guide top plate 5 can be replaced as needed.

[0023] In this embodiment, if Figure 2 and 4As shown, a water inlet integrated plate 13 and a water outlet integrated plate 16 are installed on the inner side of one side wall of the shell 1, one end of the heat exchange tube 9 is connected to the water inlet integrated plate 13, and the other end of the heat exchange tube 9 is connected to the water outlet integrated plate 16. A water inlet pipe 11 connected to the water inlet integrated plate 13 and a water outlet pipe 12 connected to the water outlet integrated plate 16 are provided on the outer side of the side wall of the shell 1. The heat exchange tube 9 is S-shaped, and the water inlet integrated plate 13 and the water outlet integrated plate 16 can be used to centrally supply and discharge water to the heat exchange tube 9, which is easy to install.

[0024] In this embodiment, an anti-backdraft piece 10 is installed inside the smoke outlet 2 to prevent backdraft from blowing into the water heater.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0027] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A high-efficiency and energy-saving condensing heat exchanger for a water heater, characterized in that: include: A shell (1), a smoke inlet (3) is provided on one side of the bottom plate (8) of the shell (1), a smoke outlet (2) is installed on the top of the shell (1), a plurality of heat exchange tubes (9) are installed inside the shell (1), a guide plate is installed inside the shell (1), the guide plate extends upward from the side of the heat exchange tube (9) close to the smoke inlet (3), bypasses the heat exchange tube (9) and then extends to the bottom plate (8), a gap (6) is provided between the end of the guide plate and the bottom plate (8), smoke enters the shell (1) from the smoke inlet (3) and flows through the heat exchange tube (9) and the gap (6), and is finally discharged from the smoke outlet (2).

2. The high-efficiency and energy-saving condensing heat exchanger for a water heater according to claim 1, characterized in that: The bottom plate (8) is inclined, the smoke inlet (3) is arranged at a high position of the bottom plate (8), and a drainage pipe (15) is installed at a low position of the bottom plate (8).

3. The high-efficiency and energy-saving condensing heat exchanger for a water heater according to claim 2, characterized in that: A liquid level sensor (14) is installed on one side of the housing (1) at a position close to the lower part of the bottom plate (8).

4. The high-efficiency energy-saving condensing heat exchanger for a water heater according to claim 1, characterized in that: A temperature sensor (7) is also installed on the side wall of the housing (1).

5. The high-efficiency and energy-saving condensing heat exchanger for a water heater according to claim 1, characterized in that: The guide plate comprises a guide side plate (4) installed on the side close to the smoke inlet (3) and a guide top plate (5) installed on the upper side of the heat exchange tube (9), and one side of the guide top plate (5) is connected to the guide side plate (4).

6. The high-efficiency energy-saving condensing heat exchanger for a water heater according to claim 1, characterized in that: A water inlet integrated plate (13) and a water outlet integrated plate (16) are installed on the inner side of one side wall of the shell (1), one end of the heat exchange tube (9) is connected to the water inlet integrated plate (13), and the other end of the heat exchange tube (9) is connected to the water outlet integrated plate (16), and a water inlet pipe (11) connected to the water inlet integrated plate (13) and a water outlet pipe (12) connected to the water outlet integrated plate (16) are provided on the outer side of the side wall of the shell (1).

7. The high-efficiency and energy-saving condensing heat exchanger for a water heater according to claim 1, characterized in that: An anti-backflow piece (10) is installed inside the smoke outlet (2).

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