A protective device for air source heat pump water heater

Abstract

The present application discloses a protective device for air source heat pump water heaters, which belongs to the field of air source heat pump water heaters, including an outer box, an inner box arranged inside the outer box, and an outer tube that connects the inner box to the outer box, and a hollow cavity structure is formed between the inner box and the outer box, and the hollow cavity is formed by a combination of an upper cylindrical cavity, an annular cavity, and a lower cylindrical cavity, and the annular cavity is divided into left and right semi-arc cavities by symmetrically fixed fixing strips, and the upper cylindrical cavity and the annular cavity are blocked, and a pressure relief component is installed inside the outer tube. The present application forms a flow channel between the inner box and the outer box, and introduces high-temperature and high-pressure gas into the flow channel, thereby promoting the liquefaction of the high-temperature and high-pressure gas while achieving thermal insulation effect, and at the same time introduces outside air into the flow channel, thereby further promoting the liquefaction of the high-temperature and high-pressure gas, and preventing the high-temperature and high-pressure gas from being ejected and causing erosion to the surrounding environment and the outer surface of the water storage tank.

Description

Technical Field

[0001] The present application relates to the field of air source heat pump water heaters, and in particular, to a protective device for air source heat pump water heaters. Background Art

[0002] The air source heat pump water heater uses a small amount of electricity to drive the compressor. The high-pressure liquid working fluid evaporates into gas in the evaporator after passing through the expansion valve, and absorbs a large amount of heat energy from the air; the gaseous working fluid is compressed by the compressor into a high-temperature, high-pressure liquid, and then enters the condenser to release heat and heat the water. Since the air pressure in the water tank will increase after the water is heated, in order to prevent the water tank from bursting or leaking, a pressure relief valve will be installed on the water tank for pressure relief protection.

[0003] In the prior art, generally, when the pressure relief valve is used for pressure relief protection, the discharged gas contains more water, which will corrode the surrounding environment and the outer surface of the water tank and cause waste of water resources. At the same time, there is also a protection device for an air source heat pump water heater as shown in the existing authorization announcement No. CN117704638B, wherein the gas with water vapor released from the water tank is received by an insulation structure, and the end of the epitaxial cylinder is insulated by the heat carried by the gas, and the water condensed by the gas is returned to the water tank through the reflux structure. However, in this process, the space for gas flow is small, resulting in incomplete liquefaction of water in the gas, and the water tank cannot be insulated. Therefore, the present invention provides a protection device for an air source heat pump water heater. Summary of the invention

[0004] The main purpose of the present application is to provide a protective device for an air source heat pump water heater, which forms a flow channel between an inner box and an outer box and introduces high-temperature and high-pressure gas into the flow channel, thereby promoting the liquefaction of the high-temperature and high-pressure gas while achieving thermal insulation effects. At the same time, outside air is introduced into the flow channel to further promote the liquefaction of the high-temperature and high-pressure gas and prevent the high-temperature and high-pressure gas from being ejected and corroding the surrounding environment and the outer surface of the water tank.

[0005] To achieve the above-mentioned purpose, the present application provides a protective device for an air source heat pump water heater, comprising an outer box, an inner box arranged inside the outer box, and an outer tube that connects the inside of the inner box with the outside of the outer box, a hollow cavity structure is formed between the inner box and the outer box, and the hollow cavity is formed by a combination of an upper cylindrical cavity, an annular cavity and a lower cylindrical cavity, and the annular cavity is divided into left and right semi-arc cavities by symmetrically fixed fixing strips in the annular cavity, and the upper cylindrical cavity and the annular cavity are blocked, and a pressure relief exhaust pipe and a pressure relief air intake pipe are respectively connected to the upper cylindrical cavity on the left and right sides of the outer tube, and the pressure relief exhaust pipe and the pressure relief air intake pipe respectively connect the left and right semi-arc cavities with the outer tube, and a pressure relief component is installed inside the outer tube, wherein the pressure relief component comprises:

[0006] An upper circular plate is located at the top of the epitaxial tube, and a fixing plate is vertically fixed at the middle position of the bottom end of the upper circular plate;

[0007] The lower circular plate is located at the bottom end of the epitaxial tube and is fixed to the bottom end of the fixed plate. The upper circular plate, the lower circular plate and the interior of the epitaxial tube form a cylindrical space, and the cylindrical space is divided into left and right semi-cylindrical spaces by the fixed plate. An exhaust port and an air inlet hood are respectively arranged on the upper circular plate at the top of the left and right semi-cylindrical spaces, and a pressure relief valve installation hole is opened on the lower circular plate at the bottom of the right semi-cylindrical space.

[0008] Preferably, an arc-shaped inclined plate 1 is fixed at equal intervals along the height direction on the outside of the inner box inside the left and right semi-arc-shaped cavities, and through holes are opened at equal intervals along the circumferential direction on the end of the arc-shaped inclined plate 1 close to the inner box, and an annular tube is provided at the bottom of the arc-shaped inclined plate 1 at the lowest end of the inner box, and the annular tube is connected to the through hole through a connecting tube, and a drainage pipe extending to the outside of the outer box is connected to one side of the annular tube, and an arc-shaped inclined plate 2 is fixed at equal intervals along the height direction on the inner side of the outer box between two adjacent arc-shaped inclined plates 1.

[0009] Preferably, a baffle 1 is fixed at equal intervals along the diameter direction at the bottom end of the inner box inside the lower cylindrical cavity, and a baffle 2 is fixed at equal intervals along the diameter direction at the bottom end of the outer box between two adjacent baffles 1. The left and right semi-arc cavities and the lower cylindrical cavity are combined to form a U-shaped flow channel with a U-shaped cross-section, and the interior of the U-shaped flow channel is formed into a wavy flow channel through arc inclined plate 1, arc inclined plate 2, baffle 1 and baffle 2.

[0010] Preferably, a rotating shaft is rotatably connected at the middle position inside the air intake hood, and the bottom end of the rotating shaft is extended to just above the pressure relief valve mounting hole, and rotating fans are fixed to the upper and lower ends of the rotating shaft, the front and rear sides of the air intake hood are connected to air intake pipes, and exhaust hoods are fixed to the front and rear sides of the top of the lower circular plate of the right semi-cylindrical space, and the other end of the air intake pipe is connected to the exhaust hood.

[0011] Preferably, the upper cylindrical cavities on the front and rear sides of the epitaxial tube are connected to external air intake pipes, and the exhaust hood and the right semi-arc cavity are connected through the external air intake pipes.

[0012] Preferably, the top of the epitaxial cylinder is connected to a cover body via threads, and connecting holes are provided at positions corresponding to the cover body, the exhaust port and the air inlet hood, and a dustproof net is provided inside the connecting hole.

[0013] Preferably, a limiting opening is symmetrically arranged on the inner side of the epitaxial cylinder, and a limiting block matching the limiting opening is fixedly connected to the bottom of the upper circular plate.

[0014] The benefits of the present application are as follows: first, the high-pressure and high-temperature gas is introduced into the right semi-arc cavity through the pressure relief intake pipe, and the high-temperature and high-pressure gas entering the right semi-arc cavity passes through the right semi-arc cavity, the lower cylindrical cavity and the left semi-arc cavity in sequence. In this process, a U-shaped flow channel with a U-shaped cross-section is formed by the right semi-arc cavity, the lower cylindrical cavity and the left semi-arc cavity, and a wave-shaped flow channel is formed inside the U-shaped flow channel through the arc-shaped inclined plate 1, the arc-shaped inclined plate 2, the baffle 1 and the baffle 2, so that the temperature and pressure of the high-temperature and high-pressure gas are further reduced in this process, thereby improving its liquefaction effect. At the same time, although the high-temperature and high-pressure gas is partially cooled and reduced in pressure during its flow, the air inside the flow channel forms a thermal insulation barrier compared to the outside air, thereby achieving a thermal insulation effect on the inside of the inner box, and further protecting the water storage tank;

[0015] Secondly, at the moment when the high-pressure and high-temperature gas enters the right semi-cylindrical space, due to the high pressure of the ejected gas, the rotating fan at the bottom of the rotating shaft will be driven to rotate, and then the rotating fan at the top of the rotating shaft will be driven to rotate, thereby sucking the outside air into the air intake hood, and then introduced into the interior of the external air intake pipe through the air intake pipe and the exhaust hood and enters the right semi-arc cavity to mix with the high-pressure gas entering therein. At the same time, it is explained that a one-way valve is installed inside the external air intake pipe, so that the high-pressure gas cannot be discharged from the external air intake pipe. After the outside air is mixed with the high-temperature and high-pressure gas, the temperature of the high-temperature and high-pressure gas is reduced, thereby liquefying the water in the high-temperature and high-pressure gas, preventing the high-temperature and high-pressure gas from being ejected and eroding the surrounding environment and the outer surface of the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0018] Figure 2 yes Figure 1 Enlarged structural diagram at A in the middle.

[0019] Figure 3 yes Figure 1 Enlarged structural diagram at B in the middle.

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of the outer box top of the present invention.

[0021] Figure 5 It is a schematic diagram of the overall bottom cross-sectional structure of the present invention.

[0022] Figure 6 yes Figure 5 Enlarged structural diagram at point C in the middle.

[0023] Figure 7 It is a schematic diagram of the overall external structure of the present invention.

[0024] In the above figure, 100, inner box; 101, arc-shaped inclined plate 1; 102, baffle 1; 103, through hole; 200, outer box; 201, arc-shaped inclined plate 2; 202, baffle 2; 203, fixing strip; 204, annular pipe; 205, drain pipe; 206, connecting pipe; 300, extension tube; 400, pressure relief assembly; 401, upper circular plate; 402, exhaust port; 403, air inlet pipe; 404, air inlet hood; 405, rotating shaft; 406, rotating fan; 407, pressure relief valve mounting hole; 408, exhaust hood; 409, lower circular plate; 410, fixing plate; 500, external air inlet pipe; 600, pressure relief exhaust pipe; 700, pressure relief inlet pipe; 800, cover body. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0027] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0028] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0029] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] See also Figure 1-Figure 7 As shown, this embodiment provides a protective device for an air source heat pump water heater, comprising an outer box 200, an inner box 100 arranged inside the outer box 200, and an outer tube 300 that connects the inside of the inner box 100 with the outside of the outer box 200, a hollow cavity structure is formed between the inner box 100 and the outer box 200, and the hollow cavity is formed by combining an upper cylindrical cavity, an annular cavity and a lower cylindrical cavity, and the annular cavity is divided into two parts by symmetrically fixed fixing strips 203. The outer tube 300 is divided into left and right semi-arc cavities, and the upper cylindrical cavity and the annular cavity are blocked, and the upper cylindrical cavities on the left and right sides of the outer tube 300 are respectively connected with a pressure relief exhaust pipe 600 and a pressure relief intake pipe 700, and the pressure relief exhaust pipe 600 and the pressure relief intake pipe 700 respectively connect the left and right semi-arc cavities with the outer tube 300, and the inner part of the outer tube 300 is equipped with a pressure relief component 400, wherein the pressure relief component 400 includes:

[0032] The upper circular plate 401 is located at the top of the epitaxial tube 300 , and a fixing plate 410 is vertically fixed at the middle position of the bottom end of the upper circular plate 401 ;

[0033] The lower circular plate 409 is located at the bottom end of the epitaxial tube 300 and is fixed to the bottom end of the fixed plate 410. The upper circular plate 401, the lower circular plate 409 and the interior of the epitaxial tube 300 form a cylindrical space, and the cylindrical space is divided into left and right semi-cylindrical spaces by the fixed plate 410. An exhaust port 402 and an air inlet hood 404 are respectively provided on the upper circular plate 401 at the top of the left and right semi-cylindrical spaces, and a pressure relief valve mounting hole 407 is opened on the lower circular plate 409 at the bottom of the right semi-cylindrical space.

[0034] In this embodiment, an arc-shaped inclined plate 101 is fixed at equal intervals along the height direction of the outer side of the inner box 100 inside the left and right semi-arc-shaped cavities, and through holes 103 are opened at equal intervals along the circumferential direction of the end of the arc-shaped inclined plate 101 close to the inner box 100, and an annular pipe 204 is arranged at the bottom of the arc-shaped inclined plate 101 at the lowest end of the inner box 100, and the annular pipe 204 is connected to the through hole 103 through a connecting pipe 206, and one side of the annular pipe 204 is connected to a drainage pipe 205 extending to the outside of the outer box 200, and the two adjacent arc-shaped inclined plates 101 are connected to each other. On the inner side of the outer box 200, arc-shaped inclined plates 201 are fixed at equal intervals along its height direction. The liquefied water drips downward from the through holes 103 opened on each arc-shaped inclined plate 101 until it reaches the arc-shaped inclined plate 101 of the last layer, and the condensed water is introduced into the annular tube 204 through the connecting pipe 206, and then discharged through the drain pipe 205. During this process, a valve is installed on the drain pipe 205. When water needs to be collected, the valve is opened to discharge the water. The drain pipe 205 can also be connected to the water inlet position of the inner box 100, thereby realizing water circulation and preventing waste of water resources.

[0035] In this embodiment, the bottom end of the inner box 100 inside the lower cylindrical cavity is fixed with baffles 102 at equal intervals along its diameter direction, and the bottom end of the outer box 200 between two adjacent baffles 102 is fixed with baffles 202 at equal intervals along its diameter direction. The left and right semi-arc cavities and the lower cylindrical cavity are combined to form a U-shaped flow channel with a U-shaped cross-section, and the inside of the U-shaped flow channel is formed into a wavy flow channel through the arc-shaped inclined plate 101, the arc-shaped inclined plate 201, the baffle 102 and the baffle 202, and enters the right semi-arc cavity and passes through the right semi-arc cavity in sequence. The gas passes through the right semi-arc cavity, the lower cylindrical cavity and the left semi-arc cavity, and then is discharged from the pressure relief exhaust pipe 600 into the left semi-cylindrical space, and is finally discharged from the exhaust port 402. During this process, a U-shaped flow channel with a U-shaped cross-section is formed by the right semi-arc cavity, the lower cylindrical cavity and the left semi-arc cavity, and a wavy flow channel is formed inside the U-shaped flow channel through the arc inclined plate 101, the arc inclined plate 201, the baffle 1 102 and the baffle 2 202, so that the temperature and pressure of the high-temperature and high-pressure gas are further reduced in this process, thereby improving its liquefaction effect.

[0036] In this embodiment, a rotating shaft 405 is rotatably connected at the middle position inside the air intake hood 404, and the bottom end of the rotating shaft 405 is extended to just above the pressure relief valve mounting hole 407, and rotating fans 406 are fixed to the upper and lower ends of the rotating shaft 405, and the front and rear sides of the air intake hood 404 are connected to air intake pipes 403, and exhaust hoods 408 are fixed to the front and rear sides of the top of the lower circular plate 409 of the right semi-cylindrical space, and the other end of the air intake pipe 403 is connected to the exhaust hood 408. At the moment when the high-pressure and high-temperature gas enters the right semi-cylindrical space, the high pressure of the ejected gas will drive the rotating fan 406 at the bottom end of the rotating shaft 405 to rotate, and then drive the rotating fan 406 at the top end of the rotating shaft 405 to rotate, thereby sucking outside air into the air intake hood 404.

[0037] In this embodiment, the upper cylindrical cavities on the front and rear sides of the epitaxial tube 300 are connected to external air intake pipes 500, and the exhaust hood 408 and the right semi-arc cavity are connected through the external air intake pipes 500. The outside air entering the exhaust hood 408 is introduced into the right semi-arc cavity through the external air intake pipes 500 to mix with the high-pressure gas entering therein. After the outside air is mixed with the high-temperature and high-pressure gas, the temperature of the high-temperature and high-pressure gas is reduced, thereby liquefying the water in the high-temperature and high-pressure gas, thereby preventing the high-temperature and high-pressure gas from being ejected and corroding the surrounding environment and the outer surface of the water tank.

[0038] In this embodiment, the top of the epitaxial tube 300 is connected to the cover body 800 through threads, and connecting holes are opened at positions corresponding to the cover body 800, the exhaust port 402 and the air inlet cover 404, and a dustproof net is arranged inside the connecting hole. The cover body 800 is installed on the top of the epitaxial tube 300 through the cooperation between the threads. At the same time, the connecting hole is designed so that gas can be discharged and entered, and dust is prevented by the dustproof net.

[0039] In this embodiment, a limiting opening is symmetrically arranged on the inner side of the epitaxial tube 300, and a limiting block matching the limiting opening is fixedly connected to the bottom of the upper circular plate 401. When the pressure relief assembly 400 is assembled inside the epitaxial tube 300, the limiting block corresponds to the limiting opening, thereby limiting the pressure relief assembly 400 to prevent rotation when the high-pressure gas is ejected.

[0040] In summary:

[0041] It is explained here that first, the magnesium rod is installed from the epitaxial tube 300 to the inside of the inner box 100, and then the pressure relief assembly 400 is installed in the inside of the epitaxial tube 300, and then the cover body 800 is installed on the top of the epitaxial tube 300 through the cooperation between the threads. At the same time, it is explained that the two pressure relief valves are respectively assembled to the inside of the pressure relief valve mounting hole 407 and the pressure relief exhaust pipe 600. Then, during use, the high-pressure and high-temperature gas inside the inner box 100 is introduced into the right semi-cylindrical space through the pressure relief valve inside the pressure relief valve mounting hole 407, and then the high-pressure and high-temperature gas is introduced into the right semi-arc cavity through the pressure relief intake pipe 700. At the moment when the high-pressure and high-temperature gas enters the right semi-cylindrical space, due to the high pressure of the ejected gas, This will drive the rotating fan 406 at the bottom of the rotating shaft 405 to rotate, and then drive the rotating fan 406 at the top of the rotating shaft 405 to rotate, thereby sucking the outside air into the air intake hood 404, and then introducing it into the outside air intake pipe 500 through the air intake pipe 403 and the exhaust hood 408 and entering the right semi-arc-shaped cavity to mix with the high-pressure gas entering therein. At the same time, it is explained that a one-way valve is installed inside the external air intake pipe 500, so that the high-pressure gas cannot be discharged from the external air intake pipe 500. After the outside air is mixed with the high-temperature and high-pressure gas, the temperature of the high-temperature and high-pressure gas is reduced, so that the water in the high-temperature and high-pressure gas is liquefied, preventing the high-temperature and high-pressure gas from being sprayed out to the surrounding environment and the outside of the water tank. The surface is eroded, and the high-temperature and high-pressure gas entering the right semi-arc cavity passes through the right semi-arc cavity, the lower cylindrical cavity and the left semi-arc cavity in turn, and then is discharged from the pressure relief exhaust pipe 600 into the left semi-cylindrical space, and finally is discharged from the exhaust port 402. In this process, a U-shaped flow channel with a U-shaped cross-section is formed by the right semi-arc cavity, the lower cylindrical cavity and the left semi-arc cavity, and a wave-shaped flow channel is formed inside the U-shaped flow channel through the arc-shaped inclined plate 101, the arc-shaped inclined plate 201, the baffle 102 and the baffle 202, so that the temperature and pressure of the high-temperature and high-pressure gas are further reduced in this process, thereby improving its liquefaction effect. The liquefied water flows out from each arc-shaped inclined plate 1 The through hole 103 opened on 101 drips downwards until it reaches the arc-shaped inclined plate 101 of the last layer, and the condensed water is introduced into the annular tube 204 through the connecting pipe 206, and then discharged through the drain pipe 205. In this process, a valve is installed on the drain pipe 205. When the water needs to be collected, the valve is opened to discharge the water. The drain pipe 205 can also be connected to the water inlet position of the inner box 100, so as to realize water circulation and prevent water resource waste. At the same time, although the high-temperature and high-pressure gas is partially cooled and reduced in pressure during the flow process, compared with the outside air, the air inside the flow channel forms a thermal insulation barrier, thereby achieving a thermal insulation effect on the inside of the inner box 100, and further protecting the water storage tank.

Claims

1. A protective device for an air source heat pump water heater, comprising an outer box (200), an inner box (100) arranged inside the outer box (200), and an outer tube (300) connecting the inside of the inner box (100) with the outside of the outer box (200), characterized in that: A hollow cavity structure is formed between the inner box (100) and the outer box (200), and the hollow cavity is formed by combining an upper cylindrical cavity, an annular cavity and a lower cylindrical cavity, and the annular cavity is divided into left and right semi-arc cavities by a symmetrically fixed fixing strip (203), and the upper cylindrical cavity and the annular cavity are blocked, and a pressure relief exhaust pipe (600) and a pressure relief air intake pipe (700) are respectively connected to the upper cylindrical cavity on the left and right sides of the epitaxial tube (300), and the pressure relief exhaust pipe (600) and the pressure relief air intake pipe (700) respectively connect the left and right semi-arc cavities with the epitaxial tube (300), and a pressure relief assembly (400) is installed inside the epitaxial tube (300), wherein the pressure relief assembly (400) comprises: An upper circular plate (401) is located at the top of the epitaxial cylinder (300), and a fixing plate (410) is vertically fixed at the middle position of the bottom end of the upper circular plate (401); The lower circular plate (409) is located at the bottom end of the epitaxial tube (300) and is fixed to the bottom end of the fixing plate (410); the upper circular plate (401), the lower circular plate (409) and the interior of the epitaxial tube (300) form a cylindrical space, and the cylindrical space is divided into left and right semi-cylindrical spaces by the fixing plate (410); an exhaust port (402) and an air inlet hood (404) are respectively provided on the upper circular plate (401) at the top of the left and right semi-cylindrical spaces, and a pressure relief valve mounting hole (407) is provided on the lower circular plate (409) at the bottom of the right semi-cylindrical space; Arc-shaped inclined plates (101) are fixed at equal intervals along the height direction on the outside of the inner box (100) inside the left and right semi-arc-shaped cavities, and through holes (103) are opened at equal intervals along the circumferential direction at the end of the arc-shaped inclined plate (101) close to the inner box (100), and an annular tube (204) is provided at the bottom of the arc-shaped inclined plate (101) at the lowest end of the inner box (100), and the annular tube (204) is connected to the through hole (103) through a connecting tube (206), and a drainage pipe (205) extending to the outside of the outer box (200) is connected to one side of the annular tube (204), and arc-shaped inclined plates (201) are fixed at equal intervals along the height direction on the inside of the outer box (200) between two adjacent arc-shaped inclined plates (101); Baffle plates 1 (102) are fixed at equal intervals along the diameter direction of the bottom end of the inner box (100) inside the lower cylindrical cavity, and baffle plates 2 (202) are fixed at equal intervals along the diameter direction of the bottom end of the outer box (200) between two adjacent baffle plates 1 (102). The left and right semi-arc-shaped cavities and the lower cylindrical cavity are combined to form a U-shaped flow channel with a U-shaped cross-section, and the inside of the U-shaped flow channel is formed into a wave-shaped flow channel by arc-shaped inclined plate 1 (101), arc-shaped inclined plate 2 (201), baffle plate 1 (102) and baffle plate 2 (202).

2. A protective device for an air source heat pump water heater according to claim 1, characterized in that: A rotating shaft (405) is rotatably connected at a middle position inside the air intake hood (404), and the bottom end of the rotating shaft (405) is extended to just above the pressure relief valve mounting hole (407), and rotating fans (406) are fixed to both upper and lower ends of the rotating shaft (405), and both front and rear sides of the air intake hood (404) are connected to an air intake pipe (403), and both front and rear sides of the top of the lower circular plate (409) of the right semi-cylindrical space are fixed to an exhaust hood (408), and the other end of the air intake pipe (403) is connected to the exhaust hood (408), and the other end of the air intake pipe (403) is connected to the exhaust hood (408).

3. A protective device for an air source heat pump water heater according to claim 2, characterized in that: The upper cylindrical cavities on both the front and rear sides of the epitaxial tube (300) are connected to external air intake pipes (500), and the exhaust hood (408) and the right semi-arc-shaped cavity are connected via the external air intake pipes (500).

4. A protective device for an air source heat pump water heater according to claim 1, characterized in that: The top of the epitaxial cylinder (300) is connected to a cover body (800) via a thread, and a communication hole is provided at a position corresponding to the cover body (800) and the exhaust port (402) and the air inlet cover (404), and a dustproof net is provided inside the communication hole.

5. A protective device for an air source heat pump water heater according to claim 1, characterized in that: A limiting opening is symmetrically arranged on the inner side of the epitaxial cylinder (300), and a limiting block matching the limiting opening is fixedly connected to the bottom of the upper circular plate (401).

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