Pre-heat-exchange water storage structure and gas water heater

Abstract

The utility model discloses a pre-heat-exchange water storage structure and a gas water heater and belongs to the technical field of household appliances. The pre-heat-exchange water storage structure comprises a heat exchanger and a fan arranged on a flue gas outlet path of the heat exchanger, and further comprises a water storage assembly arranged at an outlet of the fan. A smoke exhaust channel and a water storage cavity are formed in the water storage assembly, and the water storage cavity covers at least part of the outer surface of the smoke exhaust channel; and the water storage cavity is communicated with the water flow channel of the heat exchanger and is not communicated with the smoke exhaust channel. According to the gas water heater, the water storage assembly is arranged and used for storing water, the stored water absorbs smoke exhausted by the draught fan, smoke waste heat is better utilized, and the heat exchange efficiency of the gas water heater is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and particularly relates to a pre-heat exchange water storage structure and a gas water heater. Background Art

[0002] A gas water heater uses gas as fuel, heating water through combustion, transferring heat to cold water flowing through a heat exchanger to produce hot water. However, in existing gas water heaters, the heat exchanged by the burner inside the water heater remains at a temperature of approximately 100-200°C after passing through the heat exchanger and is directly discharged to the outside. This means that the heat exchange efficiency of existing gas water heaters still needs to be further improved. Utility Model Content

[0003] To solve the above technical problems, the present invention further improves the internal structure of the gas water heater, in order to further improve the heat utilization rate of the flue gas after heat exchange. One of the purposes of the present invention is to provide a pre-heat exchange water storage structure, and the second purpose is to provide a corresponding gas water heater.

[0004] The specific technical solution is described below:

[0005] The pre-heat exchange water storage structure includes a heat exchanger and a fan arranged on the flue gas outlet path of the heat exchanger, and also includes:

[0006] A water storage component provided at the outlet of the blower;

[0007] The water storage assembly is provided with a smoke exhaust channel and a water storage cavity, and the water storage cavity covers at least a portion of the outer surface of the smoke exhaust channel;

[0008] The water storage chamber is communicated with the water flow channel of the heat exchanger.

[0009] In the above technical solution, the water storage component arranged at the fan outlet is used to store water, and the stored water absorbs the flue gas discharged by the fan, thereby better utilizing the waste heat of the flue gas and improving the heat exchange efficiency of the gas water heater.

[0010] Preferably, the air outlet of the fan is laterally arranged, the water storage assembly has a vertically distributed water storage space, and the smoke exhaust inlet and the smoke exhaust outlet of the smoke exhaust channel have staggered smoke exhaust flow trajectories; further preferably, the smoke exhaust inlet of the smoke exhaust channel is arranged at the side wall of the water storage assembly, and the smoke exhaust outlet of the smoke exhaust channel is arranged at the upper surface of the water storage assembly.

[0011] The horizontally arranged fan outlet prevents the smoke from being discharged directly upwards. It forms a circuitous channel in conjunction with the setting of the smoke exhaust channel, which is conducive to sufficient heat exchange and convenient for arrangement in a relatively narrow space.

[0012] Preferably, the smoke exhaust channel includes a plurality of parallel sub-channels.

[0013] Preferably, a flue gas mixing section is provided at the turning points of several of the sub-channels, and a mixing path with a cross-sectional area repeatedly shrinking and then expanding is provided in the flue gas mixing section. The specific manifestation of the mixing path is as follows: a number of spacer columns are provided at intervals in the mixing path, each spacer column has four side walls, each side wall is a curved surface, and the curvature of each curved surface enables the spacer column to form a mixing structure with thicker ends and thinner middle. When the flue gas flows through the mixing structure, the change in the cross-sectional area of ​​the path causes the flue gas to always be in a state of compression-expansion, so that the heat in the flue gas can be fully diffused and conducted.

[0014] Further preferably, the flue gas mixing section includes a plurality of sub-mixing sections, each of which connects at least part of the sub-channels. The flue gas mixing section can improve heat exchange uniformity and heat exchange effect, and the sub-mixing sections further improve heat exchange uniformity by connecting the sub-channels.

[0015] Preferably, the water inlet of the water storage chamber is arranged on the lower surface of the water storage assembly, and the water outlet of the water storage chamber is arranged on the side wall of the water storage assembly. Further preferably, the smoke exhaust inlet and the water outlet are arranged on the same side wall to facilitate arrangement in a small space.

[0016] Preferably, a smoke collecting hood is provided between the heat exchanger and the inlet of the fan.

[0017] Preferably, the heat exchanger, the smoke collecting hood and the fan are sequentially arranged in the vertical direction from bottom to top, and the vertical arrangement has the advantage of high integration.

[0018] Preferably, the water storage chamber and the smoke exhaust channel are not connected.

[0019] The gas water heater is internally provided with the water storage structure described in any of the above technical solutions.

[0020] In summary, the technical solution of the present invention has the following main beneficial effects:

[0021] Compared with the existing technology, the technical solution of the utility model utilizes the water stored in the water storage component to absorb the waste heat of the flue gas, thereby improving the heat exchange efficiency of the gas water heater.

[0022] Further or more detailed beneficial effects will be described in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the internal structure of the gas water heater in the embodiment;

[0024] Figure 2 2 is a front view structural diagram of the water storage assembly in the embodiment;

[0025] Figure 3 2 is a schematic diagram of the three-dimensional structure of the water storage assembly in the embodiment;

[0026] Figure 4 Schematic diagram of the internal cross-sectional structure of the water storage assembly in the embodiment.

[0027] Reference numerals:

[0028] 1: Water storage assembly, 1.1: Smoke exhaust channel, 1.11: Smoke exhaust inlet, 1.12: Smoke exhaust outlet, 1.13: Sub-channel, 1.14: Smoke mixing unit, 1.141: Sub-mixing unit, 1.2: Water storage chamber, 1.21: Water inlet, 1.22: Water outlet;

[0029] 2: Heat exchanger, 3: Fan, 4: Fume hood, 5: Burner. DETAILED DESCRIPTION

[0030] The present invention will be further explained with reference to the following embodiments:

[0031] The core technical problem faced by the technical solution of the embodiment of this application comes from the inventor's accurate understanding of the existing technology. Therefore, how to improve the thermal utilization rate of the gas water heater is a technical problem that the inventor urgently needs to solve.

[0032] It should be noted that the embodiments do not constitute a limitation on the scope of protection of the claims of the present utility model. Based on the technical concepts provided / proven by the embodiments, all technical solutions that can be reasonably anticipated by technical personnel in the relevant technical field should be included in the scope of protection of the claims of the present utility model.

[0033] The embodiments are described in detail as follows:

[0034] Please refer to the attached Figures 1 to 4 This embodiment relates to a pre-heat exchange water storage structure, which is arranged in the shell of a gas water heater and includes a fan 3, a smoke hood 4, a heat exchanger 2, and a burner 5, which are arranged in sequence from top to bottom. The suction port of the fan 3 faces downward and is arranged on the path of the smoke outlet in the heat exchanger 2, and the outlet of the fan 3 faces horizontally.

[0035] The structure also includes a water storage assembly 1 disposed at the outlet of the fan 3. The water storage assembly 1 is provided with a smoke exhaust channel 1.1 and a water storage chamber 1.2. The water storage chamber 1.2 is used to store water. The water storage chamber 1.2 covers a portion of the outer surface of the smoke exhaust channel 1.1 and is not connected to the smoke exhaust channel 1.1.

[0036] The water storage chamber 1.2 is arranged vertically, the smoke exhaust inlet 1.11 of the smoke exhaust channel 1.1 is arranged on the side wall of the water storage component 1, and the water outlet 1.22 of the water storage chamber 1.2 is arranged on the same side wall. The smoke exhaust outlet 1.12 of the smoke exhaust channel 1.1 is arranged on the upper surface of the water storage component 1, and the water inlet 1.21 of the water storage chamber 1.2 is arranged on the lower surface of the water storage component 1. The water storage chamber 1.2 is connected to the water flow channel of the heat exchanger 2 through the above-mentioned water outlet 1.22.

[0037] The smoke exhaust channel 1.1 includes a plurality of parallel sub-channels 1.13. A smoke mixing section 1.14 is provided at the turning point where the sub-channels 1.13 turn from horizontal to vertical. The smoke mixing section 1.14 includes a plurality of sub-mixing sections 1.141. Each sub-mixing section 1.141 connects a row of sub-channels 1.13 at their turning point. Each sub-mixing section 1.141 is provided with a mixing path whose cross-sectional area repeatedly decreases and then increases. In this embodiment, the mixing path is specifically manifested as follows: a plurality of spacers are provided at intervals in the mixing path. Each spacer has four side walls, each of which is a curved surface. The curvature of each curved surface causes the spacers to form a mixing structure with thicker ends and thinner middle. When the smoke flows through the mixing structure, the change in the cross-sectional area of ​​the path causes the smoke to constantly change between compression and expansion, allowing the heat in the smoke to be fully diffused and conducted.

[0038] In a further preferred embodiment, a plurality of spacer columns are arranged in an array in the sub-mixing section 1.141.

[0039] In the technical solution of this embodiment, the water storage assembly 1 provided at the outlet of the fan 3 is used to store water, and the stored water absorbs the flue gas exhausted by the fan 3, thereby better utilizing the waste heat of the flue gas and improving the heat exchange efficiency of the gas water heater. The horizontally arranged outlet of the fan 3 prevents the flue gas from being discharged directly upward. This, together with the arrangement of the exhaust channel 1.1, forms a circuitous channel, which is conducive to sufficient heat exchange.

[0040] The structure described in this embodiment is also convenient for arrangement in a relatively narrow space, and has the advantage of high integration;

[0041] At the same time, the flue gas mixing section 1.14 can improve the heat exchange uniformity and heat exchange effect. Each sub-mixing section 1.141 is connected to a row of sub-channels 1.13 to further improve the heat exchange uniformity.

[0042] In a preferred embodiment, the water storage assembly 1 is further provided with an electric auxiliary heating device, which includes a heating pipe disposed in the water storage chamber 1.2 and a heating joint disposed outside the water storage chamber. When power is supplied through the heating joint, heating is provided through the heating pipe. The heating pipe is arranged at the bottom of the water storage chamber 1.2, so that water can be heated from the moment it enters the water storage chamber 1.2 and is conveniently arranged away from the smoke exhaust passage 1.1.

[0043] The stored water is preheated by an electric auxiliary heating device, which not only makes better use of the waste heat of flue gas and improves the heat exchange efficiency of the gas water heater, but also shortens the time users wait for hot water and improves the user experience.

[0044] The embodiment also relates to a gas water heater, which is internally provided with the pre-heat exchange water storage structure described in any of the above embodiments.

[0045] Throughout this specification, reference to terms such as "embodiment," "basic embodiment," "preferred embodiment," "other embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0047] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A preheat exchange water storage structure comprising a heat exchanger (2) and a fan (3) arranged on the flue gas outlet path of the heat exchanger (2), characterized in that: Also included are: A water storage assembly (1) disposed at the outlet of the fan (3); A smoke exhaust channel (1.1) and a water storage cavity (1.2) are provided in the water storage assembly (1), and the water storage cavity (1.2) covers at least a portion of the outer surface of the smoke exhaust channel (1.1); The water storage chamber (1.2) is connected to the water flow channel of the heat exchanger (2).

2. The water storage structure according to claim 1, characterized in that: The air outlet of the fan (3) is arranged laterally, a vertically distributed water storage space is provided in the water storage assembly (1), and the smoke exhaust inlet (1.11) and the smoke exhaust outlet (1.12) of the smoke exhaust channel (1.1) have staggered smoke exhaust flow trajectories.

3. The water storage structure according to claim 2, characterized in that: The smoke exhaust inlet (1.11) of the smoke exhaust channel (1.1) is arranged on the side wall of the water storage component (1), and the smoke exhaust outlet (1.12) of the smoke exhaust channel (1.1) is arranged on the upper surface of the water storage component (1).

4. The water storage structure according to claim 1 or 2, characterized in that: The smoke exhaust channel (1.1) comprises a plurality of parallel sub-channels (1.13).

5. The water storage structure according to claim 4, characterized in that: A flue gas mixing portion (1.14) is provided at the turning points of a plurality of the sub-channels (1.13), and a mixing path whose cross-sectional area repeatedly shrinks and then expands is provided in the flue gas mixing portion (1.14).

6. The water storage structure according to claim 5, characterized in that: The flue gas mixing section (1.14) includes a plurality of sub-mixing sections (1.141), and each of the sub-mixing sections (1.141) enables at least part of the sub-channels (1.13) to communicate with each other.

7. The water storage structure according to claim 2, characterized in that: The water inlet (1.21) of the water storage chamber (1.2) is arranged on the lower surface of the water storage assembly (1), and the water outlet (1.22) of the water storage chamber (1.2) is arranged on the side wall of the water storage assembly (1).

8. The water storage structure according to claim 7, characterized in that: The smoke exhaust inlet (1.11) and the water outlet (1.21) are arranged on the same side wall.

9. The water storage structure according to claim 1, characterized in that: A smoke collecting hood (4) is provided between the heat exchanger (2) and the inlet of the fan (3).

10. The water storage structure according to claim 9, characterized in that: In the vertical direction from bottom to top, the heat exchanger (2), the smoke collecting hood (4) and the fan (3) are arranged in sequence.

11. The water storage structure according to claim 1, characterized in that: The water storage chamber (1.2) and the smoke exhaust channel (1.1) are not connected.

12. Gas water heater, characterized by: The water storage structure according to any one of claims 1 to 11 is arranged inside.

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