Air-cooled box body and water heater

Abstract

The utility model provides a kind of air-cooled box and water heater, including outer shell, inner shell and middle layer heat insulating plate, combustion chamber is equipped in inner shell inside, first air-cooled flow channel and second air-cooled flow channel are formed by roundabout setting between outer shell, middle layer heat insulating plate and inner shell, first air-cooled flow channel, second air-cooled flow channel are all communicated with the outside of outer shell and combustion chamber;The output end of first air-cooled flow channel is close to the top of combustion chamber and is arranged, the output end of second air-cooled flow channel is close to the bottom of combustion chamber and is arranged, outside air simultaneously flows through first air-cooled flow channel and second air flow flow channel and exchanges heat with air-cooled box, and heat exchange efficiency is high;While outside air enters combustion chamber through the input end of first air-cooled flow channel and second air-cooled flow channel, supplies air for combustion chamber, increases oxygen content in combustion chamber, and improves combustion efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to an air-cooled housing and water heater. Background Technology

[0002] A gas water heater is a device that heats cold water flowing through a heat exchanger by burning combustible gas to generate heat. Gas water heaters have a combustion chamber, the shell of which is typically made of copper sheets due to the advantages of oxygen-free copper, including good processing, welding, corrosion resistance, and low-temperature performance. However, oxygen-free copper will discolor at high temperatures, and rapid temperature rise and prolonged overheating of the shell can affect the heat exchange efficiency of the gas water heater. Therefore, some existing gas water heaters incorporate air-cooling devices to reduce the surface temperature rise of the combustion chamber. However, these air-cooling devices still suffer from problems such as poor cooling performance leading to persistently high surface temperatures in the combustion chamber, or complex structures.

[0003] Chinese patent application No. 202223368711.3, published on July 7, 2023, discloses a gas water heater with an air-cooled housing and a gas water heater. The air-cooled housing includes an outer shell, an inner shell, and at least one inner partition. The outer shell is fitted over the inner shell, and an air-cooling cavity is provided between the outer shell and the inner shell. A combustion chamber is provided inside the inner shell. An air inlet is provided on the outer shell, and an air outlet is provided on the inner shell, with the air outlet communicating with the combustion chamber. The inner partition is located between the outer shell and the inner shell, and at least one inner partition divides the air-cooling cavity into at least two layers of air-cooling channels. One end of two adjacent layers of air-cooling channels is connected to each other to form a U-shaped channel. The air inlet communicates with the air outlet through the air-cooling channels.

[0004] The multi-layered airflow channels are interconnected, forming only one independent air-cooled channel. External air enters the combustion chamber through only one channel, resulting in low heat exchange efficiency. At the same time, the air-cooled housing only has air outlets at the bottom of the inner shell, thus reducing the amount of air entering the combustion chamber. Furthermore, the length of each airflow channel corresponds to the length of the air-cooled housing. The overall distance of the airflow channels is long, resulting in high air resistance within the channels. This reduces the airflow velocity, further decreasing the heat exchange efficiency and affecting the heat dissipation effect. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an air-cooled housing and a water heater, in which external air flows through the first air-cooling channel and the second air-cooling channel to exchange heat with the air-cooled housing, resulting in high heat exchange efficiency; at the same time, external air enters the combustion chamber through the input ends of the first air-cooling channel and the second air-cooling channel to supply air to the combustion chamber, increase the oxygen content in the combustion chamber, and improve combustion efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution used in this utility model is as follows:

[0007] An air-cooled housing includes an outer shell, an inner shell, and a middle heat insulation plate. A combustion chamber is provided inside the inner shell. A first air-cooling channel and a second air-cooling channel are formed in a circuitous manner between the outer shell, the middle heat insulation plate, and the inner shell. Both the first and second air-cooling channels are connected to the outside of the outer shell and the combustion chamber. The output end of the first air-cooling channel is located near the top of the combustion chamber, and the output end of the second air-cooling channel is located near the bottom of the combustion chamber.

[0008] Preferably, an air-cooled cavity is formed between the outer shell, the middle insulation plate, and the inner shell. The middle insulation plate is disposed in the air-cooled cavity and has a first ventilation hole and a second ventilation hole. The first ventilation hole connects to the air-cooled cavity to form a first air-cooled flow channel, and the second ventilation hole connects to the air-cooled cavity to form a second air-cooled flow channel. The first air-cooled flow channel extends from one end of the air-cooled cavity toward the horizontal axis of the air-cooled cavity, and the second air-cooled flow channel extends from the other end of the air-cooled cavity toward the horizontal axis of the air-cooled cavity.

[0009] The overall length of the first air-cooling channel is defined by the location of the first vent; the overall length of the second air-cooling channel is defined by the location of the second vent. The first and second air-cooling channels are distributed along the height of the air-cooling cavity and extend from the end of the air-cooling cavity towards its horizontal axis, respectively. The distance between the first and second air-cooling channels is short; the air resistance in the first and second air-cooling channels is low, the air-cooling process is fast, and the heat exchange efficiency is good.

[0010] Preferably, the air-cooled cavity includes a first air-cooled cavity and a second air-cooled cavity. The first air-cooled cavity is located between the outer shell and the middle insulation plate, and the second air-cooled cavity is located between the middle insulation plate and the inner shell. The width of the second air-cooled cavity is smaller than the width of the first air-cooled cavity.

[0011] Preferably, a first air inlet and a second air inlet are provided on the outer shell; the first air inlet is connected to the input end of the first air-cooling channel, and the second air inlet is connected to the input end of the second air-cooling channel.

[0012] Preferably, the inner shell is provided with a first air outlet and a second air outlet, the first air outlet being connected to the output end of the first air-cooling channel, and the second air outlet being connected to the output end of the second air-cooling channel.

[0013] Another objective of this invention is to provide a water heater comprising an air-cooled housing and a burner, wherein the burner is detachably connected to the air-cooled housing.

[0014] Compared to existing technologies, the beneficial effects of the air-cooled housing described in this utility model are mainly reflected in the following aspects: Through the circuitous arrangement of the first and second air-cooling channels, external air can fully exchange heat with the outer shell, the middle insulation plate, and the inner shell, reducing the overall temperature of the air-cooled housing and preventing overheating and excessively rapid temperature rise. External air simultaneously flows through the first and second air-cooling channels to exchange heat with the air-cooled housing, resulting in high heat exchange efficiency. Simultaneously, external air enters the combustion chamber through the input ends of the first and second air-cooling channels, supplying air to the combustion chamber, increasing the oxygen content within the combustion chamber, and improving combustion efficiency.

[0015] The output end of the second air-cooled flow channel is located near the bottom of the combustion chamber, close to the combustion flame. The air flowing out of the second air-cooled flow channel drives the air to flow towards the combustion flame; increasing the air circulation around the combustion flame helps to replenish oxygen and dissipate heat, further promoting combustion.

[0016] The output end of the first air-cooled flow channel is located near the top of the combustion chamber. The air flowing out of the first air-cooled flow channel drives the external air flow, reducing the surface temperature of the combustion chamber.

[0017] The overall length of the first air-cooling channel is defined by the location of the first vent; the overall length of the second air-cooling channel is defined by the location of the second vent. The first and second air-cooling channels are distributed along the height of the air-cooling cavity and extend from the end of the air-cooling cavity towards its horizontal axis, respectively. The distance between the first and second air-cooling channels is short; the air resistance in the first and second air-cooling channels is low, the air-cooling process is fast, and the heat exchange efficiency is good.

[0018] The width of the second air-cooled cavity is smaller than that of the first air-cooled cavity. This narrowing of the second air-cooled cavity increases the flow rate of external air after it enters the second air-cooled cavity from the first air-cooled cavity, thereby improving the heat exchange efficiency of the air.

[0019] Compared with the prior art, the beneficial effects of the water heater described in this utility model are mainly reflected in: setting up an air-cooled box in the water heater for heat exchange, and supplementing air to the combustion chamber while dissipating heat from the water heater, thereby improving combustion efficiency.

[0020] This invention improves both heat exchange efficiency and combustion efficiency by setting up a first air-cooling channel and a second air-flow channel. Attached Figure Description

[0021] The above and other objects, features, and advantages of this invention will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this invention.

[0022] Figure 1 This is a three-dimensional schematic diagram of the air-cooled enclosure.

[0023] Figure 2 This is an exploded view of the air-cooled enclosure.

[0024] Figure 3 This is a cross-sectional view of the air-cooled enclosure.

[0025] Figure 4 This is a cross-sectional view showing the connection between the air-cooled housing and the burner.

[0026] Figure 5 This is a schematic diagram showing the connection between the air-cooled housing and the heat exchanger and burner.

[0027] Reference numerals: 1. Air-cooled housing; 11. Outer shell, first air inlet 111, second air inlet 112; 12. Inner shell, first air outlet 121, second air outlet 122; 13. Middle insulation plate, first vent 131, second vent 132; 14. Combustion chamber; 15. First air-cooled flow channel; 16. Second air-cooled flow channel; 17. Air-cooled cavity, first air-cooled cavity 171, second air-cooled cavity 172; 2. Heat exchanger; 3. Burner. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand this utility model and implement it. However, the embodiments are not intended to limit this utility model. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this utility model.

[0029] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0030] Example 1

[0031] like Figure 1-4As shown, an air-cooled enclosure includes an outer shell 11, an inner shell 12, and a middle heat insulation plate 13. A combustion chamber 14 is provided inside the inner shell 12. A first air-cooling channel 15 and a second air-cooling channel 16 are formed in a circuitous manner between the outer shell 11, the middle heat insulation plate 13, and the inner shell 12. Both the first air-cooling channel 15 and the second air-cooling channel 16 are connected to the outside of the outer shell 11 and the combustion chamber 14. External air exchanges heat fully with the outer shell, the middle heat insulation plate 13, and the inner shell 12, reducing the overall temperature of the air-cooled enclosure and preventing overheating and excessive temperature rise. External air flows through the first air-cooling channel 15 and the second air-cooling channel simultaneously to exchange heat with the air-cooled enclosure, resulting in high heat exchange efficiency. At the same time, external air enters the combustion chamber 14 through the input ends of the first air-cooling channel 15 and the second air-cooling channel 16, supplying air to the combustion chamber 14, increasing the oxygen content in the combustion chamber 14, and improving combustion efficiency.

[0032] The output end of the first air-cooled flow channel 15 is located near the top of the combustion chamber 14, and the output end of the second air-cooled flow channel 16 is located near the bottom of the combustion chamber 14. The second air-cooled flow channel 16, being close to the bottom of the combustion chamber 14 and the combustion flame, allows air flowing from it to move towards the combustion flame, increasing airflow around the flame, aiding in oxygen replenishment and heat dissipation, and further promoting combustion. The first air-cooled flow channel 15, located near the top of the combustion chamber 14, allows air flowing from it to move external air, reducing the surface temperature of the combustion chamber 14.

[0033] An air-cooled cavity 17 is formed between the outer shell 11, the middle heat insulation plate 13, and the inner shell 12. The middle heat insulation plate 13 is disposed in the air-cooled cavity 17, and a first vent 131 and a second vent 132 are provided on the middle heat insulation plate 13. The first vent 131 connects to the air-cooled cavity 17 to form a first air-cooled flow channel 15, and the second vent 132 connects to the air-cooled cavity 17 to form a second air-cooled flow channel 16. (Refer to...) Figure 3 As shown, the first air-cooling channel 15 extends from one end of the air-cooling cavity 17 toward the horizontal axis of the air-cooling cavity 17, and the second air-cooling channel 16 extends from the other end of the air-cooling cavity 17 toward the horizontal axis of the air-cooling cavity 17.

[0034] The overall length of the first air-cooled channel 15 is defined by the position of the first vent 131; the overall length of the second air-cooled channel 16 is defined by the position of the second vent 132. The first air-cooled channel 15 and the second air-cooled channel 16 are distributed along the height direction of the air-cooled cavity 17 and extend from the end of the air-cooled cavity 17 toward the horizontal axis of the air-cooled cavity 17, respectively. The distance between the first air-cooled channel 15 and the second air-cooled channel 16 is short. The air resistance in the first air-cooled channel 15 and the second air-cooled channel 16 is small, the air-cooling is fast, and the heat exchange efficiency is good.

[0035] The air-cooled cavity 17 includes a first air-cooled cavity 171 and a second air-cooled cavity 172. The first air-cooled cavity 171 is located between the outer shell 11 and the middle insulation plate 13, and the second air-cooled cavity 172 is located between the middle insulation plate 13 and the inner shell 12. The width of the second air-cooled cavity 172 is smaller than the width of the first air-cooled cavity 171. This narrower width of the second air-cooled cavity 172 increases the airflow velocity after entering the second air-cooled cavity 172 from the first air-cooled cavity 171, thus improving the heat exchange efficiency. The width of the first air-cooled cavity 171 is 3-4 mm, and the width of the second air-cooled cavity 172 is 2-3 mm; in a preferred embodiment, the width of the first air-cooled cavity 171 is 3 mm, and the width of the second air-cooled cavity 172 is 2 mm.

[0036] Preferably, the outer shell 11 is provided with a first air inlet 111 and a second air inlet 112; the first air inlet 111 is connected to the input end of the first air-cooling channel 15, and the second air inlet 112 is connected to the input end of the second air-cooling channel 16. This achieves communication between the first air-cooling channel 15 and the outside of the outer shell 11, and between the second air-cooling channel 16 and the outside of the outer shell 11. (Refer to...) Figure 2 and 3 As shown, the first air inlet 111 is located above the second air inlet 112. The first air inlet 111 is located near the top of the outer shell 11, and the second air inlet 112 is located near the bottom of the outer shell 11.

[0037] Preferably, the inner shell 12 is provided with a first air outlet 121 and a second air outlet 122, both of which are connected to the combustion chamber 14. The first air outlet 121 is also connected to the output end of the first air-cooling channel 15, and the second air outlet 122 is also connected to the output end of the second air-cooling channel 16. This achieves communication between the first air-cooling channel 15 and the combustion chamber 14, and between the second air-cooling channel 16 and the combustion chamber 14. (Refer to...) Figure 2 and 3 As shown, the first air outlet 121 is located above the second air outlet 122. The first air outlet 121 is located near the top of the inner shell 12, and the second air outlet 122 is located near the bottom of the inner shell 12.

[0038] Example 2

[0039] like Figure 5As shown, a water heater includes a water heater shell (not shown) and an air-cooled housing 1, a heat exchanger 2, and a burner 3 disposed within the water heater shell. The burner 3 is located at the bottom of the air-cooled housing 1, and the heat exchanger 2 is located at the top of the air-cooled housing 1. Both the burner 3 and the heat exchanger 2 are detachably connected to the air-cooled housing 1. The air-cooled housing 1 is used in the water heater for heat exchange, simultaneously dissipating heat from the water heater and supplying air to the combustion chamber 14, thereby improving combustion efficiency.

[0040] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions 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 a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A forced air cooled box comprising an outer shell, an inner shell and a middle layer of insulation, a combustion chamber being provided inside the inner shell, characterised in that: A first air-cooled channel and a second air-cooled channel are formed in a roundabout manner between the outer shell, the middle heat insulation plate and the inner shell. Both the first air-cooled channel and the second air-cooled channel are connected to the outside of the outer shell and the combustion chamber. The output end of the first air-cooled channel is located near the top of the combustion chamber, and the output end of the second air-cooled channel is located near the bottom of the combustion chamber.

2. The air-cooled enclosure according to claim 1, characterized in that: The outer shell, the middle insulation plate, and the inner shell form an air-cooled cavity. The middle insulation plate is disposed in the air-cooled cavity and has a first ventilation hole and a second ventilation hole. The first ventilation hole connects to the air-cooled cavity to form a first air-cooled flow channel, and the second ventilation hole connects to the air-cooled cavity to form a second air-cooled flow channel. The first air-cooled flow channel extends from one end of the air-cooled cavity toward the horizontal axis of the air-cooled cavity, and the second air-cooled flow channel extends from the other end of the air-cooled cavity toward the horizontal axis of the air-cooled cavity.

3. The air-cooled enclosure according to claim 2, characterized in that: The air-cooled cavity includes a first air-cooled cavity and a second air-cooled cavity. The first air-cooled cavity is located between the outer shell and the middle insulation plate, and the second air-cooled cavity is located between the middle insulation plate and the inner shell. The width of the second air-cooled cavity is smaller than the width of the first air-cooled cavity.

4. The air-cooled enclosure according to claim 1, characterized in that: The outer shell is provided with a first air inlet and a second air inlet; the first air inlet is connected to the input end of the first air-cooling channel, and the second air inlet is connected to the input end of the second air-cooling channel.

5. The air-cooled enclosure according to claim 1, characterized in that: The inner shell is provided with a first air outlet and a second air outlet. The first air outlet is connected to the output end of the first air-cooling channel, and the second air outlet is connected to the output end of the second air-cooling channel.

6. A water heater, characterized in that: The device includes the air-cooled enclosure as described in any one of claims 1-5, and also includes a burner detachably connected to the air-cooled enclosure.

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