Base plate and integral air-source heat pump water heater

Abstract

The present application relates to a base plate and an integrated air-source heat pump water heater. The base plate is used in the integrated air-source heat pump water heater. The integrated air-source heat pump water heater includes a water tank component and a heat pump head component. The base plate is disposed between the water tank component and the heat pump head component. The base plate includes a main body portion and an extension portion. The main body portion is arranged opposite to the heat pump head component or the water tank component. The extension portion is connected to and disposed beside the main body portion. The extension portion is deviated from the water tank component and the heat pump head component. The extension portion is provided with a drainage hole and an overflow hole spaced apart from each other. Both of the drainage hole and the overflow hole are located adjacent to an edge of the extension portion away from the main body portion. According to the base plate of the present application, by providing the overflow hole, flammable and explosive refrigerants can be promptly discharged from the heat pump head component through the overflow hole when the drainage hole is clogged in extreme weather conditions, such as cold winters, thereby greatly ensuring the safety of the integrated air-source heat pump water heater and the personal safety of the users.

Description

RELATED APPLICATIONS

[0001] This application claims priority to Chinese patent application No. 202311214000.7, entitled "BASE PLATE AND INTEGRATED AIR-SOURCE HEAT PUMP WATER HEATER", filed on September 19, 2023, the content of which is hereby incorporated by reference in its entirety.TECHNICAL FIELD

[0002] The present application relates to the technical field of air conditioning, and in particular, relates to a base plate and an integrated air-source heat pump water heater.BACKGROUND

[0003] An air-source heat pump water heater, also known as a heat pump water heater, using air as a heat source to heat water through a heat pump. In recent years, integrated air-source heat pump water heaters have gained significant popularity among consumers due to their characteristics such as ease of installation, low operating noise, etc. Generally, integrated water heaters adopt a configuration of a heat pump head positioned above a water tank. The heat pump head typically includes key components such as a compressor, a condenser, a fan, a piping system, and an electrical control system. As the freon circuit is located within the heat pump head, there may be a potential risk of refrigerant leakage. Due to environmental regulations, refrigerants used in the refrigeration industry are gradually being replaced by environmentally friendly refrigerants. For instance, R290 refrigerant, which has a higher density than air and is highly prone to explosion in the presence of an open flame, is one such example. In the case of integrated water heaters, there is a risk of explosion, which could endanger personal safety, if refrigerant leakage occurs and the refrigerant is not promptly discharged from the heater.SUMMARY

[0004] The present application aims to address at least one of the technical issues existing in the prior art. In view of this, the present application proposes a base plate capable of promptly discharging overflowed refrigerant, thereby enhancing the explosion-proof safety performance of an integrated air-source heat pump water heater.

[0005] In a first aspect, the present application provides a base plate configured to be disposed between a water tank component and a heat pump head component of an integrated air-source heat pump water heater. The base plate includes a main body portion and an extension portion. The main body portion is arranged opposite to the heat pump head component or the water tank component. The extension portion is connected to and disposed beside the main body portion. The extension portion is deviated from the water tank component and the heat pump head component. The extension portion is provided with a drainage hole and an overflow hole spaced apart from each other. Both of the drainage hole and the overflow hole are located adjacent to an edge of the extension portion away from the main body portion.

[0006] Optionally, the extension portion is positioned at the same height as the main body portion.

[0007] Optionally, the extension portion protrudes from outer surfaces of a main body of the water tank component and a main body of the heat pump head component.

[0008] Optionally, the overflow hole is disposed closer to the main body portion than the drainage hole.

[0009] Optionally, the extension portion has a triangular shape, the drainage hole is disposed adjacent to a vertex of the triangular extension portion away from the main body portion, and the overflow hole is disposed adjacent to one edge of the triangular extension portion forming the vertex.

[0010] Optionally, a first guiding portion is disposed on the extension portion, the first guiding portion is in fluid communication with the overflow hole, and the first guiding portion extends from the extension portion toward a side adjacent to the heat pump head component.

[0011] Optionally, a second guiding portion is disposed on the extension portion, the second guiding portion is in fluid communication with the drainage hole, and the second guiding portion extends from the extension portion toward a side adjacent to the water tank component.

[0012] Optionally, the heat pump head component includes a compressor, a condenser assembly, a fan assembly, and an electrical control assembly. The main body portion is provided with a first drainage channel and a second drainage channel. The first drainage channel is configured to be disposed corresponding to the compressor, the condenser assembly, the fan assembly, and the electrical control assembly. The second drainage channel is in fluid communication with the first drainage channel and the extension portion.

[0013] Optionally, the first drainage channel includes a plurality of sub-drainage channels. The compressor, the condenser assembly, the fan assembly, and the electrical control assembly are each disposed corresponding to at least one of the plurality of sub-drainage channels.

[0014] Optionally, one of the plurality of sub-drainage channels is in fluid communication with the other sub-drainage channels and is also in fluid communication with the second drainage channel.

[0015] Optionally, the sub-drainage channel configured to be disposed corresponding to the condenser assembly is disposed between the other sub-drainage channels.

[0016] Optionally, the sub-drainage channel configured to be disposed corresponding to the condenser assembly is a first sub-drainage channel, and the other sub-drainage channels include a second sub-drainage channel, a third sub-drainage channel, a fourth sub-drainage channel, a fifth sub-drainage channel, and a sixth sub-drainage channel. The second sub-drainage channel and the third sub-drainage channel are located at a first side of the first sub-drainage channel, while the fourth sub-drainage channel, the fifth sub-drainage channel, and the sixth sub-drainage channel are located at a second side of the first sub-drainage channel. The second sub-drainage channel is configured to be disposed corresponding to the electrical control assembly. The third sub-drainage channel is configured to be disposed corresponding to the compressor. The fourth sub-drainage channel, the fifth sub-drainage channel, and the sixth sub-drainage channel are configured to be disposed corresponding to the fan assembly.

[0017] Optionally, a bottom wall of each of the second sub-drainage channel, the third sub-drainage channel, the fourth sub-drainage channel, the fifth sub-drainage channel, and the sixth sub-drainage channel is inclined along a direction from a position away from the first sub-drainage channel to a position adjacent to the first sub-drainage channel, and inclined toward the water tank component.

[0018] Optionally, a sensor is disposed on one side of the overflow hole, and the base plate further includes a notification unit. The sensor is electrically connected to the notification unit and is configured to detect the amount of leaked refrigerant.

[0019] In a second aspect, the present application provides an integrated air-source heat pump water heater including a water tank component, a heat pump head component, and the above-described base plate, wherein the base plate is disposed between the water tank component and the heat pump head component.

[0020] Optionally, the heat pump head component includes a main body and an extension cover protruding from the main body, wherein the extension cover is positioned corresponding to the extension portion of the base plate, and matches the extension portion in shape, and the extension cover covers the extension portion.

[0021] Optionally, a gap is defined between the extension cover and an end of the first guiding portion away from the overflow hole.

[0022] Compared with the prior art, the technical solutions provided by the embodiments of the present application possess the following advantages:

[0023] After the integrated air-source heat pump water heater operates for a period of time, condensation water may form and drip onto the base plate, and is subsequently discharged from the base plate through the drainage hole. When the drainage hole is not clogged, the leaked refrigerant can be discharged from the heat pump head component through both the overflow hole and the drainage hole. However, when the drainage hole is clogged, such as frozen in extremely cold weather, the refrigerant can be discharged from the heat pump head component through the overflow hole. The drainage hole and the overflow hole are both located adjacent to the edge of the extension portion away from the main body portion, because the density of typical refrigerants is higher than that of air, causing the leaked refrigerant to accumulate in this area, making the leaked refrigerant easy to be discharged through the overflow hole. The safety of the integrated air-source heat pump water heater and the personal safety of users can be effectively guaranteed by promptly expelling flammable and explosive refrigerants from the heat pump head component.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings herein are incorporated into the specification and form a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, a brief description to the drawings used for the description of the embodiments or the prior art is provided below. It is apparent that, for those of ordinary skill in the art, additional drawings can be obtained based on these drawings without exerting creative effort. FIG. 1 is an exploded view of an integrated air-source heat pump water heater according to an embodiment of the present application. FIG. 2 is a front view of a base plate according to an embodiment of the present application. FIG. 3 is a cross-sectional view taken along line D-D in FIG. 2. FIG. 4 is an enlarged view of portion A in FIG. 2.

[0026] Reference signs: Integrated air-source heat pump water heater 100, base plate 1, main body portion 10, first drainage channel 11, sub-drainage channel 111, first sub-drainage channel 112, second sub-drainage channel 113, third sub-drainage channel 114, fourth sub-drainage channel 115, fifth sub-drainage channel 116, sixth sub-drainage channel 117, second drainage channel 12, extension portion 20, drainage hole 21, overflow hole 22, first guiding portion 23, second guiding portion 24, water tank component 2, heat pump head component 3, main body 31, extension cover 32.DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It is apparent that the described embodiments are only a part, not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort shall fall within the scope of protection of the present application.

[0028] The following disclosure provides many different embodiments or examples to provide different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described below, which are merely examples and are not intended to limit the present application. Additionally, the present application may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0029] For ease of description, spatially relative terms may be used herein to describe the relative positional relationship or motion of one element or feature with respect to another element or feature as shown in the drawings. These relative terms include, for example, "internal," "external," "inner," "outer," "below," "beneath," "above," "upper," "front," "rear," and the like. Such spatially relative terms are intended to encompass different orientations of the device in use or operation beyond the orientation depicted in the drawings. For example, if the device in the drawings is inverted, undergoes a change in posture, or experiences a change in motion state, these directional indications will correspondingly change. For instance, elements described as "below" or "beneath" other elements or features may subsequently be oriented "above" or "over" other elements or features. Thus, the exemplary term "below" can encompass both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other directions), and the spatially relative descriptors used herein are interpreted accordingly.

[0030] As shown in FIG. 1, FIG. 2, and FIG. 4, according to an embodiment of the present application, a base plate 1 is used in an integrated air-source heat pump water heater 100. The integrated air-source heat pump water heater 100 includes a water tank component 2, a heat pump head component 3, and the base plate 1. The base plate 1 is disposed between the water tank component 2 and the heat pump head component 3. The base plate 1 includes a main body portion 10 and an extension portion 20. The main body portion 10 is arranged opposite to the heat pump head component 3 or the water tank component 2. The extension portion 20 is connected to and disposed beside the main body portion 10, and is deviated from the water tank component 2 and the heat pump head component 3. The extension portion 20 is provided with a drainage hole 21 and an overflow hole 22 spaced apart from each other. Both of the drainage hole 21 and the overflow hole 22 are located adjacent to an edge of the extension portion 20 away from the main body portion 10.

[0031] The extension portion 20 is connected to and disposed beside the main body portion 10, meaning that the extension portion 20 and the main body portion 10 are connected with each other and positioned at the same height level in the integrated air-source heat pump water heater 100. The height direction of the integrated air-source heat pump water heater 100 refers to the direction from the heat pump head component 3 to the water tank component 2.

[0032] The extension portion 20 is deviated from the water tank component 2 and the heat pump head component 3, meaning that the orthographic projection of the extension portion 20 on a plane perpendicular to the height direction does not overlap with the orthographic projection of a main body of the water tank component 2 or the orthographic projection of a main body of the heat pump head component 3 on said plane, i.e., the extension portion 20 protrudes from the outer surfaces of the main body of the water tank component 2 and the main body of the heat pump head component 3.

[0033] After the integrated air-source heat pump water heater 100 operates for a period of time, condensation water may be formed on the surface of the heat pump head component 3, and drip onto the base plate 1, which is then discharged from the base plate 1 through the drainage hole 21. In the event of refrigerant leak, when the drainage hole 21 is not clogged, the leaked refrigerant can be discharged from the heat pump head component 3 through both the overflow hole 22 and the drainage hole 21. However, when the drainage hole 21 is clogged, such as frozen in extremely cold weather, the refrigerant can be discharged from the heat pump head component 3 through the overflow hole 22. The drainage hole 21 and the overflow hole 22 are both located adjacent to the edge of the extension portion 20 away from the main body portion 10, because the density of typical refrigerants is higher than that of air, causing the leaked refrigerant to accumulate in this area, making the leaked refrigerant easy to be discharged through the overflow hole 22.

[0034] The drainage hole 21 has, but not limited to, a circular shape, square shape, elliptical shape, triangular shape, etc. The overflow hole 22 has, but not limited to, a circular shape, square shape, elliptical shape, triangular shape, etc.

[0035] Since the extension portion 20 protrudes from the other components of the integrated air-source heat pump water heater 100, the transition between the edges of the extension portion 20 is rounded, so as to prevent the extension portion 20 from scratching other equipment or the users. Additionally, in a specific embodiment, while satisfying the positional requirements for the drainage hole 21 and the overflow hole 22, the extension portion 20 has a triangular shape to reduce its size as much as possible.

[0036] In some embodiments, in order to enhance the structural strength of the extension portion 20, a reinforcing rib is disposed on the side of the extension portion 20 adjacent to the water tank component 2. The reinforcing rib is connected to the main body portion 10.

[0037] In some embodiments, in order to prevent the condensation water from flowing out from the edges of the extension portion 20 rather than draining through the drainage hole 21, the edges of the extension portion 20 are provided with rims to collect and retain the condensation water.

[0038] According to the embodiments of the present application, the base plate 1 is provided with the overflow hole 22, so that flammable and explosive refrigerants can be promptly discharged from the heat pump head component 3 through the overflow hole 22 when the drainage hole 21 is clogged in extreme weather conditions, such as cold winters, thereby greatly ensuring the safety of the integrated air-source heat pump water heater 100 and the personal safety of the users.

[0039] In some embodiments, the overflow hole 22 is disposed closer to the main body portion 10 than the drainage hole 21. As such, the refrigerant can be discharged faster, and the positional arrangement of the overflow hole 22 and the drainage hole 21 on the extension portion 20 can be optimized, further reducing the size of the extension portion 20. In the specific embodiment shown in FIG. 4, the extension portion 20 has a triangular shape, the drainage hole 21 is disposed at the position farthest from the main body portion 10, and the overflow hole 22 is disposed between the drainage hole 21 and the main body portion 10. Specifically, the drainage hole 21 is disposed at the vertex of the triangle away from the main body portion 10, and the overflow hole 22 is disposed adjacent to one edge forming said vertex.

[0040] As shown in FIG. 2 and FIG. 3, in some embodiments, the extension portion 20 is further provided with a first guiding portion 23. The first guiding portion 23 is in fluid communication with the overflow hole 22. The first guiding portion 23 extends from the extension portion 20 toward a side adjacent to the heat pump head component 3. The first guiding portion 23 serves to isolate condensation water, preventing the condensation water from entering the overflow hole 22, which obstructs the discharge of refrigerant. Particularly, in extreme weather conditions, such as extremely cold weather, the first guiding portion 23 can prevent condensation water from freezing and blocking the overflow hole 22, thereby ensuring the effective functioning of the overflow hole 22.

[0041] It can be understood that the extension of the first guiding portion 23 from the extension portion 20 toward the side adjacent to the heat pump head component 3 can include extension perpendicular to the direction of the extension portion 20 or extension inclined relative to the direction of the extension portion 20, which is not limited in the present application.

[0042] As shown in FIG. 2 and FIG. 3, in some embodiments, the extension portion 20 is further provided with a second guiding portion 24. The second guiding portion 24 is in fluid communication with the drainage hole 21. The second guiding portion 24 extends from the extension portion 20 toward a side adjacent to the water tank component 2. Thus, the second guiding portion 24 can be connected to an external drainage pipe, thereby directing the condensation water to a predetermined location, such as a floor drain, preventing random dripping of condensation water and improving the user experience.

[0043] It can be understood that the extension of the second guiding portion 24 from the extension portion 20 toward the side adjacent to the water tank component 2 can include extension perpendicular to the direction of the extension portion 20 or extension inclined relative to the direction of the extension portion 20, which is not limited in the present application.

[0044] As shown in FIG. 2 and FIG. 3, in some embodiments, the heat pump head component 3 includes a compressor, a condenser assembly, a fan assembly, and an electrical control assembly. The main body portion 10 is provided with a first drainage channel 11 and a second drainage channel 12. The first drainage channel 11 is configured to be disposed corresponding to the compressor, the condenser assembly, the fan assembly, and the electrical control assembly. The second drainage channel 12 is in fluid communication with the first drainage channel 11 and the extension portion 20.

[0045] Specifically, the first drainage channel 11 is configured to be disposed corresponding to the compressor, the condenser assembly, the fan assembly, and the electrical control assembly, serving to collect condensation water generated on the surfaces of these components and guide the flow of the condensation water. The second drainage channel 12 is in fluid communication with the first drainage channel 11 and the extension portion 20, so that the condensation water can be directed to the extension portion 20.

[0046] As shown in FIG. 4, in order to prevent the overflow hole 22 from obstructing the flow of condensation water, the overflow hole 22 is disposed to avoid the area between the drainage hole 21 and the second drainage channel 12.

[0047] As shown in FIG. 2, in some embodiments, the first drainage channel 11 includes a plurality of sub-drainage channels 111. The compressor, the condenser assembly, the fan assembly, and the electrical control assembly are each disposed corresponding to at least one sub-drainage channel 111. As such, all sub-drainage channels 111 can more effectively collect condensation water dripping from the surfaces of the compressor, the condenser assembly, the fan assembly, or the electrical control assembly. Specifically, the compressor can be disposed corresponding to at least one sub-drainage channel 111, the condenser assembly can be disposed corresponding to at least one sub-drainage channel 111, the fan assembly can be disposed corresponding to at least one sub-drainage channel 111, and the electrical control assembly can be disposed corresponding to at least one sub-drainage channel 111.

[0048] As shown in FIG. 2, in some embodiments, one sub-drainage channel 111 among the plurality of sub-drainage channels 111 is in fluid communication with the other sub-drainage channels 111, and this sub-drainage channel 111 is also in fluid communication with the second drainage channel 12. By having one sub-drainage channel 111 in fluid communication with the other sub-drainage channels 111, condensation water from the other sub-drainage channels 111 can first converge into this sub-drainage channel 111 before being directed to the second drainage channel 12, further enhancing the effect of collecting and guiding the condensation water.

[0049] As shown in FIG. 2, in some embodiments, the sub-drainage channel 111 configured to be disposed corresponding to the condenser assembly is disposed between the other sub-drainage channels 111. It can be understood that the condenser assembly has a relatively large size, and disposing the sub-drainage channel 111 corresponding to the condenser assembly between the other sub-drainage channels 111 can shorten the flow path of condensation water, thereby accelerating its discharge and reducing the residence time of condensation water in the base plate 1. As shown in FIG. 2, a first sub-drainage channel 112 is located between the other sub-drainage channels 111.

[0050] As shown in FIG. 2, in some embodiments, the sub-drainage channel 111 configured to be disposed corresponding to the condenser assembly is the first sub-drainage channel 112, and the other sub-drainage channels 111 include a second sub-drainage channel 113, a third sub-drainage channel 114, a fourth sub-drainage channel 115, a fifth sub-drainage channel 116, and a sixth sub-drainage channel 117. The second sub-drainage channel 113 and the third sub-drainage channel 114 are located at a first side of the first sub-drainage channel 112. The fourth sub-drainage channel 115, the fifth sub-drainage channel 116, and the sixth sub-drainage channel 117 are located at a second side of the first sub-drainage channel 112. The second sub-drainage channel 113 is configured to be disposed corresponding to the electrical control assembly. The third sub-drainage channel 114 is configured to be disposed corresponding to the compressor. The fourth sub-drainage channel 115, the fifth sub-drainage channel 116, and the sixth sub-drainage channel 117 are configured to be disposed corresponding to the fan assembly. When the base plate 1 is applied in the integrated air-source heat pump water heater 100, given the relatively large size of the fan assembly, the fourth sub-drainage channel 115, the fifth sub-drainage channel 116, and the sixth sub-drainage channel 117 are configured to be disposed corresponding to the fan assembly, thereby better guiding the condensation water generated by the fan assembly, shortening the flow path of the condensation water and allowing the condensation water to be discharged from the base plate 1 as quickly as possible.

[0051] In some embodiments, the bottom wall of each of the second sub-drainage channel 113, the third sub-drainage channel 114, the fourth sub-drainage channel 115, the fifth sub-drainage channel 116, and the sixth sub-drainage channel 117 is inclined along a direction from a position away from the first sub-drainage channel 112 to a position adjacent to the first sub-drainage channel 112, and inclined toward the water tank component 2. Under the inclination effect, the condensation water from the second sub-drainage channel 113, the third sub-drainage channel 114, the fourth sub-drainage channel 115, the fifth sub-drainage channel 116, and the sixth sub-drainage channel 117 can converge into the first sub-drainage channel 112, thereby accelerating the discharge of the condensation water and preventing overflow.

[0052] In some embodiments, a sensor is disposed on one side of the overflow hole 22, and the base plate 1 further includes a notification unit. The sensor is electrically connected to the notification unit, and the sensor is configured to detect the amount of leaked refrigerant.

[0053] By positioning the sensor adjacent to the overflow hole 22, the amount of leaked refrigerant can be monitored in real-time. When the amount of leaked refrigerant reaches a certain threshold, the notification unit alerts the user, providing a warning or alerting effect, and further enhancing the safety performance of the integrated air-source heat pump water heater 100 when the base plate 1 is applied in the integrated air-source heat pump water heater 100.

[0054] It should be noted that the notification unit can generate at least one of light-based notification information, text-based notification information, voice-based notification information, or pattern-based notification information.

[0055] According to the embodiments of the present application, the integrated air-source heat pump water heater 100 includes the water tank component 2, the heat pump head component 3, and the base plate 1, wherein the base plate 1 is disposed between the water tank component 2 and the heat pump head component 3.

[0056] As shown in FIG. 1, according to the embodiments of the present application, the integrated air-source heat pump water heater 100, by incorporating the overflow hole 22, can promptly discharge flammable and explosive refrigerants from the heat pump head component 3 through the overflow hole 22 when the drainage hole 21 is clogged in extreme weather conditions, such as cold winters, which significantly enhances the safety of the integrated air-source heat pump water heater 100 and the personal safety of users.

[0057] In some embodiments, the heat pump head component 3 includes a main body 31 and an extension cover 32 protruding from the main body. The extension cover 32 is positioned corresponding to the extension portion 20, matches the extension portion 20 in shape, and the extension cover 32 covers the extension portion 20. The extension cover 32 covers the extension portion 20, preventing the internal structure of the extension portion 20 from being exposed, thereby avoiding dust accumulation that could block the drainage hole 21 and the overflow hole 22.

[0058] In some embodiments, a gap is defined between the extension cover 32 and the end of the first guiding portion 23 away from the overflow hole 22, allowing leaked refrigerant to enter the first guiding portion 23 through the gap and subsequently be discharged through the overflow hole 22.

[0059] In the description of the present application, it should also be understood that features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

[0060] In the present application, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", and the like should be interpreted broadly, and for example, may be interpreted as fixedly connected, detachably connected, or integrated connected, may be mechanically connected or electrically connected, and may be directly connected or connected via an intermediate element, or they may refer to internal communication between two elements. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to specific circumstances.

[0061] In the description of the present specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" are intended to indicate that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, exemplary description using the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A base plate configured to be disposed between a water tank component and a heat pump head component of an integrated air-source heat pump water heater, wherein the base plate comprises a main body portion and an extension portion, the main body portion is arranged opposite to the heat pump head component or the water tank component, the extension portion is connected to and disposed beside the main body portion, the extension portion is deviated from the water tank component and the heat pump head component, the extension portion is provided with a drainage hole and an overflow hole spaced apart from each other, both of the drainage hole and the overflow hole are located adjacent to an edge of the extension portion away from the main body portion.

2. The base plate according to claim 1, wherein the extension portion is positioned at the same height as the main body portion.

3. The base plate according to claim 2 or 3, wherein the extension portion protrudes from outer surfaces of a main body of the water tank component and a main body of the heat pump head component.

4. The base plate according to any one of claims 1 to 3, wherein the overflow hole is disposed closer to the main body portion than the drainage hole.

5. The base plate according to any one of claims 1 to 4, wherein the extension portion has a triangular shape, the drainage hole is disposed adjacent to a vertex of the triangular extension portion away from the main body portion, and the overflow hole is disposed adjacent to one edge of the triangular extension portion forming the vertex.

6. The base plate according to any one of claims 1 to 5, wherein a first guiding portion is disposed on the extension portion, the first guiding portion is in fluid communication with the overflow hole, and the first guiding portion extends from the extension portion toward a side adjacent to the heat pump head component.

7. The base plate according to any one of claims 1 to 6, wherein a second guiding portion is disposed on the extension portion, the second guiding portion is in fluid communication with the drainage hole, and the second guiding portion extends from the extension portion toward a side adjacent to the water tank component.

8. The base plate according to any one of claims 1 to 7, wherein the heat pump head component comprises a compressor, a condenser assembly, a fan assembly, and an electrical control assembly; the main body portion is provided with a first drainage channel and a second drainage channel; the first drainage channel is configured to be disposed corresponding to the compressor, the condenser assembly, the fan assembly, and the electrical control assembly; the second drainage channel is in fluid communication with the first drainage channel and the extension portion.

9. The base plate according to claim 8, wherein the first drainage channel comprises a plurality of sub-drainage channels; the compressor, the condenser assembly, the fan assembly, and the electrical control assembly are each disposed corresponding to at least one of the plurality of sub-drainage channels.

10. The base plate according to claim 9, wherein one of the plurality of sub-drainage channels is in fluid communication with other sub-drainage channels and is also in fluid communication with the second drainage channel.

11. The base plate according to claim 10, wherein the sub-drainage channel configured to be disposed corresponding to the condenser assembly is disposed between the other sub-drainage channels.

12. The base plate according to claim 11, wherein the sub-drainage channel configured to be disposed corresponding to the condenser assembly is a first sub-drainage channel, and the other sub-drainage channels comprise a second sub-drainage channel, a third sub-drainage channel, a fourth sub-drainage channel, a fifth sub-drainage channel, and a sixth sub-drainage channel; the second sub-drainage channel and the third sub-drainage channel are located at a first side of the first sub-drainage channel, while the fourth sub-drainage channel, the fifth sub-drainage channel, and the sixth sub-drainage channel are located at a second side of the first sub-drainage channel; the second sub-drainage channel is configured to be disposed corresponding to the electrical control assembly; the third sub-drainage channel is configured to be disposed corresponding to the compressor; the fourth sub-drainage channel, the fifth sub-drainage channel, and the sixth sub-drainage channel are configured to be disposed corresponding to the fan assembly.

13. The base plate according to claim 12, wherein a bottom wall of each of the second sub-drainage channel, the third sub-drainage channel, the fourth sub-drainage channel, the fifth sub-drainage channel, and the sixth sub-drainage channel is inclined along a direction from a position away from the first sub-drainage channel to a position adjacent to the first sub-drainage channel, and inclined toward the water tank component.

14. The base plate according to any one of claims 1 to 13, wherein a sensor is disposed on one side of the overflow hole, and the base plate further comprises a notification unit; the sensor is electrically connected to the notification unit and is configured to detect an amount of leaked refrigerant.

15. An integrated air-source heat pump water heater comprising a water tank component, a heat pump head component, and the base plate according to any one of claims 1 to 14, wherein the base plate is disposed between the water tank component and the heat pump head component.

16. The integrated air-source heat pump water heater according to claim 15, wherein the heat pump head component comprises a main body and an extension cover protruding from the main body, the extension cover is positioned corresponding to the extension portion of the base plate, and matches the extension portion in shape, and the extension cover covers the extension portion.

17. The integrated air-source heat pump water heater according to claim 15 or 16, wherein a gap is defined between the extension cover and an end of the first guiding portion away from the overflow hole.

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