CN221689051U - Circuit board support structure and heat pump water heater - Google Patents

Abstract

The utility model discloses a circuit board supporting structure and a heat pump water heater, which comprises a base, wherein the base is provided with: the first supporting parts are used for supporting the first circuit board and are arranged on the orthographic projection surface of the first circuit board facing the base; the second supporting parts are provided with a plurality of second circuit boards and are used for supporting the second circuit boards, the second supporting parts are arranged on the orthographic projection surface of the second circuit boards, which faces the base, and the second supporting parts avoid the orthographic projection surface of the first circuit boards, which faces the base, and the supporting surface of the second supporting parts is higher than the supporting surface of the first supporting parts. The circuit board supporting structure can meet the scheme of arranging a single circuit board and simultaneously arranging two circuit boards, and solves the problem that the number and the variety of the assembled circuit boards are increased under the condition of not opening a die newly. The vertical space of the base is fully utilized, two circuit boards can be supported simultaneously, the occupation of the plane space of the base is not increased, and the space is saved.

Description

Circuit board support structure and heat pump water heater

Technical Field

The utility model belongs to the technical field of water heaters, and in particular relates to a circuit board supporting structure and a heat pump water heater.

Background Art

At present, the circuit boards of household appliances need to be supported by fixed support structures. For example, the WiFi circuit board of the heat pump water heater is installed on the lining, and the installation adopts the fixing method of buckle + screw. The fixed support structure needs to be provided with support limiter and other structures matching the circuit board to be supported, and corresponding fixing screw holes. Therefore, a fixed support structure can only carry circuit boards of a single specification, and its versatility is low.

When the specifications of the circuit boards used in home appliances change, it is necessary to re-mold and manufacture the corresponding fixed support structure, which increases production costs. In addition, due to the large number of models and specifications, management costs are incurred.

In addition, some home appliances need to add new circuit boards due to upgrades or circuit board supply issues, that is, the number of circuit boards increases. If all circuit boards are laid flat on the fixed support structure, the corresponding area of the fixed support structure will increase, and then the space occupied by the fixed support structure on the home appliance will increase, wasting labor and materials and making the appliance bulky.

The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field.

Summary of the invention

The utility model aims at the technical problems that the circuit board support structure of the electrical product in the prior art can only carry circuit boards of a single specification, has low versatility, and increases the occupied area when multiple circuit boards are set. The utility model proposes a circuit board support structure that can solve the above problems.

In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

A circuit board support structure comprises a base, on which is formed:

A first supporting portion, which has a plurality of parts and is used to support a first circuit board, wherein the plurality of first supporting portions are arranged on an orthographic projection surface of the first circuit board toward the base;

The second supporting part has multiple parts for supporting the second circuit board. The multiple second supporting parts are arranged on the orthographic projection surface of the second circuit board toward the base, and the second supporting parts avoid the orthographic projection surface of the first circuit board toward the base, and the supporting surfaces of the second supporting parts with two step surfaces are higher than the supporting surfaces of the first supporting parts.

In some embodiments, the first support portion and the second support portion are integrally formed, and a plurality of assemblies consisting of the first support portion and the second support portion are arranged along a circumferential direction of the circuit board, and the first support portion is located on a side facing the space enclosed by the assembly, and the second support portion is located on a side facing away from the space enclosed by the assembly.

In some embodiments, the combination is a long strip structure, which extends in a direction parallel to the length or width of the circuit board. Two step surfaces are formed on the top surface of the long strip structure, and the two step surfaces are connected by a first connecting edge, which are the support surface of the second support part and the support surface of the first support part respectively.

In some embodiments, the combination is a horizontal U-shaped trough structure, and the opening of the U-shaped trough structure faces the space enclosed by the combination, and the top surface of the trough wall of the U-shaped trough structure is formed with two step surfaces, which are the support surface of the second support part and the support surface of the first support part respectively.

In some embodiments, the circuit board support structure further includes a first limiting portion for limiting the position of the first circuit board, and the first limiting portion includes:

a first baffle, which has one or more first baffles, which are vertically fixed to the base and are used to limit the first circuit board in the lateral direction, wherein the inner side wall of the first baffle and the first connecting edge adjacent to the first baffle are located on the same vertical plane, and the upper surface of the first baffle is not higher than the supporting surface of the second supporting portion;

The first pressing plate has one or more first pressing plates, which are laterally fixed on the base and are used to limit the first circuit board in the vertical direction. The vertical distance between the lower surface of the first pressing plate and the supporting surface of the first supporting part is not less than the thickness of the first circuit board, and the upper surface of the first pressing plate is not higher than the supporting surface of the second supporting part. The first circuit board is limited between the first pressing plate and the supporting surface of the first supporting part.

In some embodiments, when there are a plurality of assemblies and first baffles on the same side of the first circuit board, the plurality of assemblies and the first baffles are arranged alternately.

In some embodiments, the first pressing plate and the first baffle are arranged on two sides of the first circuit board opposite to each other.

In some embodiments, the circuit board support structure further includes a second limiting portion for limiting the position of the second circuit board, and the second limiting portion includes:

A second baffle, which has one or more, the second baffle is vertically fixed to the base, and is used to limit the second circuit board in the lateral direction, and the upper surface of the second baffle is not higher than the supporting surface of the second supporting part;

The second pressing plate has one or more second pressing plates, which are laterally fixed on the base and are used to limit the second circuit board in the vertical direction. The vertical distance between the lower surface of the second pressing plate and the supporting surface of the second supporting part is not less than the thickness of the second circuit board, and the second circuit board is limited between the supporting surfaces of the second pressing plate and the second supporting part.

In some embodiments, the circuit board support structure also includes a limiting support portion, which is vertically fixed on the base, and the limiting support portion is an L-shaped structure. A supporting step is formed on one of the side walls of the L-shaped structure, and the step surface of the supporting step and the supporting surface of the second supporting portion are located on the same plane for supporting the second circuit board, and the side wall of the second circuit board abuts against the vertical side of the supporting step.

In some embodiments, the circuit board support structure also includes a fixing column, a top of which is provided with an internal screw hole corresponding to the fixing hole on the first circuit board and/or the second circuit board, and a screw passes through the fixing hole on the first circuit board and/or the second circuit board and is fixed to the internal screw hole.

The utility model also proposes a heat pump water heater, which comprises a first circuit board and/or a second circuit board. The heat pump water heater also comprises any circuit board supporting structure described in the above items.

Compared with the prior art, the advantages and positive effects of the utility model are:

The circuit board support structure of the utility model can be used to support two specifications of circuit boards respectively by setting the first support part and the second support part on the base, and the two circuit boards can be set at the same time, which can meet the solution of setting a single circuit board and setting two circuit boards at the same time, and solves the problem of increasing the number and types of assembled circuit boards without opening a new mold. The vertical space of the base is fully utilized, and two circuit boards can be supported at the same time, and the occupation of the plane space of the base is not increased, saving space.

After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic diagram of a planar structure of an embodiment of a circuit board support structure proposed by the present invention;

FIG2 is a schematic structural diagram of an embodiment of a circuit board support structure proposed by the present invention;

FIG3 is an exploded view of an embodiment of a circuit board support structure provided by the present invention and a circuit board assembly state;

FIG4 is a schematic diagram of an assembled state of a first circuit board in an embodiment of a circuit board support structure proposed by the present invention;

FIG5 is a schematic diagram of an assembled state of a second circuit board in an embodiment of a circuit board support structure provided by the present invention;

FIG6 is a schematic structural diagram of one form of a combination body in one embodiment of a circuit board support structure provided by the present invention;

FIG7 is a schematic structural diagram of another form of an assembly in one embodiment of a circuit board support structure provided by the present invention;

FIG. 8 is a schematic structural diagram of a position limiting support portion in an embodiment of a circuit board support structure provided by the present invention.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are merely for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Embodiment 1

This embodiment proposes a circuit board support structure, as shown in Figures 1 to 6, including a base 4, on which a first support portion 11 and a second support portion 12 are formed, wherein the first support portion 11 has multiple first support portions 11, and the multiple first support portions 11 are used to support the first circuit board 2, and the multiple first support portions 11 are arranged on the positive projection surface of the first circuit board 2 facing the base 4.

There are multiple second support parts 12 for supporting the second circuit board 3. The multiple second support parts 12 are arranged on the orthographic projection surface of the second circuit board 3 toward the base 4, and the second support parts 12 avoid the orthographic projection surface of the first circuit board 2 toward the base. The orthographic projection surface of the first circuit board 2 toward the base falls into the orthographic projection surface of the second circuit board 3 toward the base 4. The support surface of the second support part 12 is higher than the support surface of the first support part 11.

The circuit board support structure of the present embodiment can be used to support circuit boards of two specifications respectively by arranging the first support portion 11 and the second support portion 12 on the base 4, and the two circuit boards can be arranged at the same time, which can meet the assembly solutions of setting a single circuit board and setting two circuit boards at the same time, and solves the problem of increasing the number and types of circuit boards that can be assembled without opening a new mold.

When two circuit boards are arranged at the same time, the two circuit boards are arranged in a high and low arrangement, and the vertical space of the base 4 is fully utilized. The two circuit boards can be supported at the same time without increasing the occupancy of the plane space of the base 4, thus saving space.

Generally, the base 4 is made by injection molding. In order to facilitate the production and reduce the mold opening cost, in some embodiments, as shown in Figures 1 and 6, the first support part 11 and the second support part 12 are integrally formed, which can reduce the number of corresponding parts on the mold.

A plurality of assemblies consisting of first support portions 11 and second support portions 12 are arranged along the circumference of the circuit board, and the first support portions 11 are located on the side facing the space enclosed by the assemblies, and the second support portions 12 are located on the side facing away from the space enclosed by the assemblies. Specifically, the arrangement of the assemblies should satisfy the requirement that the first support portions 11 are along the circumference of the first circuit board 2, and the second support portions 12 are along the circumference of the second circuit board 3, so as to support the first circuit board 2 and the second circuit board 3 respectively, and prevent the second support portions 12 from interfering with the first circuit board.

The first circuit board 2 and the second circuit board 3 are generally rectangular plate structures. In some embodiments, the combination can be a long strip structure 1a as shown in Figures 1 and 2, which extends in a direction parallel to the length or width of the circuit board (the first circuit board 2 or the second circuit board 3), and two step surfaces are formed on the top surface of the long strip structure 1a, namely the first step surface 111 and the second step surface 121. The first step surface 111 and the second step surface 121 are connected by a first connecting edge 112. The first step surface 111 is the supporting surface of the first supporting portion 11, and the first circuit board 2 is supported on the first step surface 111. The second step surface 121 is the supporting surface of the second supporting portion 12, and the second circuit board 3 is supported on the second step surface 121.

In some embodiments, the assembly can also be a U-shaped groove structure 1b disposed horizontally as shown in FIG. 1 and FIG. 7, and the opening of the U-shaped groove structure 1b faces the space enclosed by the assembly, and the groove walls on both sides of the U-shaped groove structure 1b are vertically fixed on the base 4, and the top surface of the groove wall of the U-shaped groove structure 1b is formed with two step surfaces, namely, a first step surface 111 and a second step surface 121, which serve as the support surface of the first support portion 11 and the support surface of the second support portion 12, respectively, to support the first circuit board 2 and the second circuit board 3. The first support portion 11 and the second support portion 12 adopt a combination of U-shaped groove structures, and two first step surfaces 111 and a U-shaped second step surface 121 can be formed on a single assembly at the same time, which can increase the support area for the circuit board and improve the stability of the support.

In some embodiments, the circuit board support structure further includes a first limiting portion for limiting the position of the first circuit board 2. As shown in FIG. 1 and FIG. 2, the first limiting portion includes a first baffle 131 and a first pressure plate 132, wherein the first baffle 131 has one or more, and the first baffle 131 is vertically fixed on the base 4, and is used to limit the first circuit board 2 in the lateral direction. The inner side wall of the first baffle 131 and the first connecting edge 112 adjacent to it are located on the same vertical plane, and the upper surface of the first baffle 131 is not higher than the supporting surface of the second supporting portion 12. The inner side wall of the first baffle 131 refers to a side wall of the space enclosed by the first baffle 131 toward the assembly. After the first circuit board 2 is supported on the supporting surface of the first supporting portion 11, its side edge abuts against the inner side wall of the first baffle 131 and the first connecting edge 112, thereby playing a role in limiting the first circuit board 2 in the lateral direction.

The first pressing plate 132 has one or more first pressing plates 132, which are fixed on the base 4 in the horizontal direction, and are used to limit the vertical position of the first circuit board 2. Specifically, as shown in FIG. 2 , the base 4 includes a bottom wall 41 and a stop frame 42 fixed to the bottom wall 41, and the first stop plate 131 and other structural members arranged vertically are actually fixed to the bottom wall 41, and the first pressing plate 132 is fixed to the stop frame 42, so that it can be arranged in the horizontal direction.

The first circuit board 2 is located between the first pressing plate 132 and the supporting surface of the first supporting portion 11, the vertical distance between the lower surface of the first pressing plate 132 and the supporting surface of the first supporting portion 11 is not less than the thickness of the first circuit board 2, and the upper surface of the first pressing plate 132 is not higher than the supporting surface of the second supporting portion 12, so as to avoid the first pressing plate 132 from interfering with the second circuit board 3. The first circuit board 2 is limited between the first pressing plate 132 and the supporting surface of the first supporting portion 11, which plays a role in limiting its vertical position.

In some embodiments, when there are a plurality of assemblies and the first baffle 131 on the same side of the first circuit board 2 , the plurality of assemblies and the first baffle 131 are arranged alternately.

In some embodiments, the first pressing plate 132 and the first baffle plate 131 are disposed opposite to each other on two sides of the first circuit board 2 to facilitate assembly of the first circuit board 2 .

The first pressing plate 132 and the first baffle plate 131 cooperate with the support of the first supporting portion 11 to firmly support and fix the first circuit board 2 .

In some embodiments, the circuit board support structure further includes a second limiting portion for limiting the position of the second circuit board 3, and the second limiting portion includes a second baffle 141 and a second pressure plate 142. The second baffle 141 has one or more, and the second baffle 141 is vertically fixed on the base 4, and is used to limit the position of the second circuit board 4 in the lateral direction. The upper surface of the second baffle 141 is not higher than the supporting surface of the second supporting portion 12 to prevent interference with the second circuit board 4.

The second pressing plate 142 has one or more second pressing plates 142, which are laterally fixed on the base 4 and are used to limit the second circuit board 3 in the vertical direction. The second circuit board 3 is located between the supporting surfaces of the second pressing plate 142 and the second supporting portion 12. The vertical distance between the lower surface of the second pressing plate 142 and the supporting surface of the second supporting portion 12 is not less than the thickness of the second circuit board 3. The second circuit board 3 is limited between the supporting surfaces of the second pressing plate 142 and the second supporting portion 12.

In some embodiments, the second pressing plate 142 and the second baffle plate 141 are disposed opposite to each other on two sides of the second circuit board 3 , so as to facilitate the assembly of the second circuit board 3 .

The second pressing plate 142 and the second baffle plate 141 cooperate with the support of the second supporting portion 12 to firmly support and fix the second circuit board 3 .

In some embodiments, as shown in Figures 1, 2, and 8, the circuit board support structure also includes a limiting support portion 15, which is vertically fixed on the base 4, and the limiting support portion 15 is an L-shaped structure. A supporting step is formed on one of the side walls of the L-shaped structure, and the step surface 151 of the supporting step is located on the same plane as the supporting surface of the second supporting portion 12, and is used to cooperate with the supporting surface of the second supporting portion 12 to support the second circuit board 3, and the side wall of the second circuit board 3 is in contact with the vertical side 152 of the supporting step, and the vertical side 152 serves to limit the second circuit board 3 laterally.

In some embodiments, the circuit board support structure also includes a fixing column 16, a top of which is provided with an internal screw hole 161 corresponding to a fixing hole (not shown in the figure) on the first circuit board 2 and/or the second circuit board 3, and a screw passes through the fixing hole on the first circuit board 2 and/or the second circuit board 3 and is fixed to the internal screw hole 161, thereby fixing the first circuit board 2 and/or the second circuit board 3 to the base 4.

Embodiment 2

This embodiment proposes a heat pump water heater, as shown in Figure 3, which includes a first circuit board 2 or a second circuit board 3, and may also include the first circuit board 2 and the second circuit board 3 at the same time. The heat pump water heater also includes a circuit board support structure, and the first circuit board 2 and/or the second circuit board 3 are fixedly arranged on the circuit board support structure.

As shown in Figures 1 to 8, the circuit board support structure includes a base 4, on which a first support portion 11 and a second support portion 12 are formed, wherein the first support portion 11 has multiple first support portions 11, and the multiple first support portions 11 are used to support the first circuit board 2, and the multiple first support portions 11 are arranged on the positive projection surface of the first circuit board 2 facing the base 4.

There are multiple second support parts 12 for supporting the second circuit board 3. The multiple second support parts 12 are arranged on the orthographic projection surface of the second circuit board 3 toward the base 4, and the second support parts 12 avoid the orthographic projection surface of the first circuit board 2 toward the base. The orthographic projection surface of the first circuit board 2 toward the base falls into the orthographic projection surface of the second circuit board 3 toward the base 4. The support surface of the second support part 12 is higher than the support surface of the first support part 11.

The circuit board support structure of the present embodiment can be used to support circuit boards of two specifications respectively by arranging the first support portion 11 and the second support portion 12 on the base 4, and the two circuit boards can be arranged at the same time, which can meet the assembly solutions of setting a single circuit board and setting two circuit boards at the same time, and solves the problem of increasing the number and types of circuit boards that can be assembled without opening a new mold.

When two circuit boards are arranged at the same time, the two circuit boards are arranged in a high and low arrangement, and the vertical space of the base 4 is fully utilized. The two circuit boards can be supported at the same time without increasing the occupancy of the plane space of the base 4, thus saving space.

Generally, the base 4 is made by injection molding. To facilitate manufacturing and reduce mold opening costs, in some embodiments, the first support portion 11 and the second support portion 12 are integrally formed, which can reduce the number of corresponding components on the mold.

A plurality of assemblies consisting of first support portions 11 and second support portions 12 are arranged along the circumference of the circuit board, and the first support portions 11 are located on the side facing the space enclosed by the assemblies, and the second support portions 12 are located on the side facing away from the space enclosed by the assemblies. Specifically, the arrangement of the assemblies should satisfy the requirement that the first support portions 11 are along the circumference of the first circuit board 2, and the second support portions 12 are along the circumference of the second circuit board 3, so as to support the first circuit board 2 and the second circuit board 3 respectively, and prevent the second support portions 12 from interfering with the first circuit board.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims (10)

1. A circuit board support structure, comprising a base, wherein the base is formed with: A first supporting portion, which has a plurality of parts and is used to support a first circuit board, wherein the plurality of first supporting portions are arranged on an orthographic projection surface of the first circuit board toward the base; The second supporting part has multiple parts for supporting the second circuit board. The multiple second supporting parts are arranged on the orthographic projection surface of the second circuit board toward the base, and the second supporting parts avoid the orthographic projection surface of the first circuit board toward the base. The supporting surface of the second supporting part is higher than the supporting surface of the first supporting part. 2. The circuit board support structure according to claim 1 is characterized in that the first support portion and the second support portion are integrally formed, and a plurality of assemblies consisting of the first support portion and the second support portion are arranged along a circumferential direction of the circuit board, and the first support portion is located on a side facing the space enclosed by the assembly, and the second support portion is located on a side facing away from the space enclosed by the assembly. 3. The circuit board support structure according to claim 2 is characterized in that the combination is a long strip structure, which extends in a direction parallel to the length or width of the circuit board, and two step surfaces are formed on the top surface of the long strip structure, which are connected by a first connecting edge, and the two step surfaces are respectively the support surface of the second support part and the support surface of the first support part. 4. The circuit board support structure according to claim 2 is characterized in that the combination is a horizontal U-shaped groove structure, and the opening of the U-shaped groove structure faces the space enclosed by the combination, and the top surface of the groove wall of the U-shaped groove structure is formed with two step surfaces, which are the support surface of the second support part and the support surface of the first support part respectively. 5. The circuit board support structure according to claim 2, characterized in that the circuit board support structure further comprises a first limiting portion for limiting the position of the first circuit board, and the first limiting portion comprises: a first baffle, which has one or more first baffles, which are vertically fixed to the base and are used to limit the first circuit board in the lateral direction, wherein the inner side wall of the first baffle and the first connecting edge adjacent to the first baffle are located on the same vertical plane, and the upper surface of the first baffle is not higher than the supporting surface of the second supporting portion; The first pressing plate has one or more first pressing plates, which are laterally fixed on the base and are used to limit the first circuit board in the vertical direction. The vertical distance between the lower surface of the first pressing plate and the supporting surface of the first supporting part is not less than the thickness of the first circuit board, and the upper surface of the first pressing plate is not higher than the supporting surface of the second supporting part. The first circuit board is limited between the first pressing plate and the supporting surface of the first supporting part. 6 . The circuit board support structure according to claim 5 , wherein when there are a plurality of assemblies and the first baffle plates on the same side of the first circuit board, the plurality of assemblies and the first baffle plates are arranged alternately. 7 . The circuit board supporting structure according to claim 5 , wherein the first pressing plate and the first baffle are arranged on two sides of the first circuit board opposite to each other. 8. The circuit board support structure according to claim 2, characterized in that the circuit board support structure further comprises a second limiting portion for limiting the position of the second circuit board, and the second limiting portion comprises: A second baffle, which has one or more, the second baffle is vertically fixed to the base, and is used to limit the second circuit board in the lateral direction, and the upper surface of the second baffle is not higher than the supporting surface of the second supporting part; The second pressing plate has one or more second pressing plates, which are laterally fixed on the base and are used to limit the second circuit board in the vertical direction. The vertical distance between the lower surface of the second pressing plate and the supporting surface of the second supporting part is not less than the thickness of the second circuit board, and the second circuit board is limited between the supporting surfaces of the second pressing plate and the second supporting part. 9. The circuit board support structure according to claim 8 is characterized in that the circuit board support structure also includes a limiting support portion, which is vertically fixed on the base, the limiting support portion is an L-shaped structure, and a supporting step is formed on one of the side walls of the L-shaped structure, the step surface of the supporting step and the supporting surface of the second supporting portion are located on the same plane, and are used to support the second circuit board, and the side wall of the second circuit board abuts against the vertical side of the supporting step. 10. A heat pump water heater, comprising a first circuit board and/or a second circuit board, wherein the heat pump water heater further comprises a circuit board supporting structure according to any one of claims 1 to 9.