Thermodynamic sanitary water heating device comprising a quick-mounting pedestal heat pump

Abstract

The invention relates to a thermodynamic domestic hot water heating device comprising: - a water storage tank extending along a first direction, the storage tank defining a second and a third direction perpendicular to the first direction; - a bucket mounted on an upper part of the tank; - a box to form at least partially with the bucket the receiving space; - a water heating module comprising a heat pump mounted on a support plate intended to rest on the bottom; - a system for fixing the support plate (40) to the bottom; characterized in that the fixing system comprises at least one lifting stop as well as a positioning stud and a positioning imprint (58).

Description

technical field

[0001] The present invention relates to the field of building construction, particularly domestic hot water. In particular, the invention relates to a domestic hot water heating device. Technological background

[0002] There are thermodynamic domestic hot water heating systems that use a heat pump to heat the water in a storage tank.

[0003] Generally, a heat exchanger for the heat pump is mounted above the storage tank in a bucket, closed by a lid, or between two shells.

[0004] To facilitate the assembly of the heat pump components in the bucket, it is common practice to pre-arrange components, such as the heat exchanger and compressor, on a support plate to form a mounting sub-assembly. This sub-assembly is also called a "cluster." This cluster is then attached to the bucket.

[0005] The cluster is usually placed vertically against the bottom of the bucket and then screwed in place to secure it. However, this mounting method is time-consuming and difficult to repeat if good mounting accuracy is desired.

[0006] Furthermore, this method does not allow for the transport of the balloon under satisfactory conditions.

[0007] Documents WO 2024 / 066818, CN 218269 575 and WO2024 / 066845 describe thermodynamic domestic hot water heating devices.

[0008] There is therefore a need to improve the method of mounting the heat pump in cluster form on the bucket to facilitate assembly and make the fixing of the support plate on the bucket more robust to ensure vertical or horizontal transport of the tank without risk of damage. Summary of the invention

[0009] To this end, the invention proposes a thermodynamic domestic hot water heating device comprising: a water storage tank extending along a first direction, the storage tank defining a second and a third direction perpendicular to the first direction; a bucket mounted on an upper part of the tank, the bucket forming a base and comprising a peripheral wall extending from and around the base to form at least partially a receiving space; a box to form at least partially with the bucket the receiving space; a water heating module comprising a heat pump mounted on a support plate intended to rest on the base; a system for fixing the support plate to the base; characterized in that The fastening system includes at least one lifting stop configured to prevent movement of the support plate along the first direction when the support plate cooperates with the lifting stop, the fastening system further includes a positioning stud and a positioning footprint configured to cooperate with the positioning stud so as to permit rotation of the support plate from a pre-mounting position to a final mounting position in which the support plate cooperates with said at least one lifting stop to prevent movement of the support plate along the first direction.

[0010] The positioning mark and imprint provide a visual and tactile guide for the user to pre-position and center the support plate on the bucket. This minimizes the risk of incorrectly positioning the support plate during pre-assembly.

[0011] Next, the positioning block and imprint act as a guide or anchor point to move the support plate to its final mounting position. The fastening system allows the support plate to engage with the lifting stop by rotating around the first direction. The required movement(s) are simple for the user, and the use of a guide further reduces the risk of incorrect final positioning of the support plate. This makes mounting the plate quick and precise for the user.

[0012] The term "anchor point" refers to the fact that there is a point of contact between the stud and the positioning footprint from the pre-assembly position to the final position of the support plate.

[0013] The lifting stop is a stop that prevents the support plate from lifting along the first direction.

[0014] The mounting system for the support plate, using the lug and positioning recess, allows for the use of a fixed stop to prevent the support plate from lifting, i.e., from moving along the first direction. This fixed stop, in this case the lifting stop, ensures the robustness of the support plate's attachment, even during transport or installation of the device.

[0015] The fixing system allows for greatly improved precision and repeatability of assembly compared to screwing the plate directly into its final mounting position.

[0016] The support plate does not cooperate with said at least one lifting stop when the support plate is in the pre-assembly position.

[0017] The heat pump and the plate preferably form a single, integrated mounting sub-assembly configured to be mounted on the bottom of the bucket.

[0018] The heat pump includes a compressor, a heat exchanger, and a set of pipes attached to the mounting plate. The heat exchanger in this case is an evaporator.

[0019] The first direction is preferably vertical. The second direction preferably extends along the evaporator of the heat pump. The third direction is perpendicular to the first and second directions. The first, second, and third directions form an orthonormal coordinate system.

[0020] The bottom of the bucket can extend in a plane perpendicular to the first direction.

[0021] The bucket may further include a peripheral wall. The peripheral wall of the bucket may extend from the bottom around the first direction and substantially parallel to the first direction.

[0022] The enclosure may include a side wall of the enclosure and a top wall of the enclosure.

[0023] The side wall of the box can extend around the first direction and substantially parallel to the first direction.

[0024] The upper wall of the box can extend in a plane perpendicular to the first direction.

[0025] The water storage tank preferably has a circular cross-section transverse to the first direction.

[0026] The outline of the peripheral wall of the bucket and / or the outline of the side wall of the container taken transversely to the first direction can be polygonal, for example rectangular or square, oval or circular.

[0027] The water storage tank preferably includes thermal insulation positioned between the tank and the casing.

[0028] The heating system may include an air extraction module mounted inside the reception area. This air may be extracted from a building in which the heating system is located or from a different air source.

[0029] The term "exhaust air" refers to air extracted from inside the building, particularly for the removal of stale air and / or air renewal within the building, air extracted from inside the building near the unit, or air extracted from outside via ducts. Specifically, the air extracted from the building is the heat source for the heat pump, which then heats the water in the storage tank.

[0030] The extraction module includes a fan positioned against the evaporator of the heat pump.

[0031] The device also includes a connecting piece positioned between the fan and the top wall of the housing. This connecting piece is configured to secure the fan to the evaporator. It is also configured to position and fix the fan to the top wall of the housing.

[0032] The connecting piece includes a raised section designed to fit, at least partially, into a ventilation opening in the upper wall of the casing. This raised section centers the connecting piece, and therefore the fan and evaporator, relative to the upper wall of the casing. This connecting piece thus reinforces the positioning and retention of both the fan and the heat pump. The heat pump's mounting is therefore improved by this connecting piece.

[0033] The height of the peripheral wall of the bucket perpendicular to the bottom may be less than the height of the side wall of the container perpendicular to the bottom.

[0034] The heat pump may include a first heat exchanger for heating water and a second heat exchanger, the second heat exchanger being positioned in the receiving space, specifically at the bottom. This second heat exchanger is the evaporator mentioned above.

[0035] The enclosure may include an air inlet and an air outlet.

[0036] The extraction module can be configured to create an airflow through the second heat exchanger.

[0037] The extraction module may include a fan or be configured to be connected to a fan, the fan being configured to allow air circulation between the inlet and outlet.

[0038] The storage tank can have a water storage volume between 50 L and 300 L.

[0039] The positioning marker can be formed on the support plate or the bottom of the bucket. The positioning imprint is formed by the other between the support plate and the bottom of the bucket.

[0040] The positioning block can be an added protrusion or formed integrally with its support, the support plate or the bottom of the bucket.

[0041] The positioning imprint can be a relief added or formed integrally with its support, the support plate or the bottom of the bucket.

[0042] The positioning imprint can be complementary in shape to the positioning stud. Alternatively, the positioning imprint can be a hole whose contour is designed to cooperate with the positioning stud. The hole could be, for example, a circular hole.

[0043] The positioning pad and footprint can be configured to allow the support plate to move in rotation and / or translation along one of the first, second and third directions.

[0044] The pedestal and the positioning footprint can be configured to allow the support plate to move in rotation and / or translation along one of the first, second and third directions, while maintaining contact between the pedestal and the positioning footprint.

[0045] The positioning block and footprint can, for example, be configured to allow the support plate to move in translation along the first direction and one of the second and third directions simultaneously. This makes it possible to lower the support plate while positioning it under a stop, such as a lifting stop.

[0046] Additionally, the positioning block and footprint can be configured to rotate the support plate in combination with translational movement. This allows for a wide variety and complexity of movement, enabling adaptation to more complex geometries of the fastening system. This makes it possible to meet more demanding positioning requirements.

[0047] The positioning block can define a cam profile. The positioning footprint can define a cam follower configured to follow the cam profile.

[0048] The cam profile can be formed by an end portion of the stud, this end portion having a convex surface, preferably spherical. More generally, the end portion of the stud can include a convex surface that forms the cam profile. This convex surface can be a spherical surface or a portion of a sphere.

[0049] A convex surface, such as a cam profile, allows for a combined movement of one or more translations and / or one or more rotations while maintaining contact between the pin and the positioning recess. The translation(s) are preferably along the first, second, or third directions. The rotation(s) are preferably around the first, second, or third directions.

[0050] The fixing system further includes at least one centering stop to prevent movement of the support plate along the second and / or third directions when the support plate is in the final mounting position.

[0051] The centering stop may include a pin or stud cooperating with a corresponding centering imprint to prevent movement of the support plate along the second and / or third directions.

[0052] The centering stop can be configured to prevent movement of the support plate along the second and third directions. In this case, the shape of the stop is configured to block the support plate in these two directions.

[0053] The centering stop is, for example, a pin or block with a circular or oval cross-section.

[0054] The centering imprint is preferably complementary in shape to the corresponding centering stop.

[0055] The support plate does not cooperate with said at least one centering stop when the support plate is in the pre-assembly position.

[0056] The base forms a bearing area with the support plate between the stud and the positioning recess. The base may also include at least one additional bearing area for the support plate when the support plate is in its final mounting position.

[0057] The base preferably comprises at least three support zones, including at least one additional support zone and the support zone formed by the pedestal and the positioning imprint. The additional support zone is preferably located near the center of gravity of the assembly formed by the heat pump and the support plate. The third support zone is preferably formed at a peripheral level, preferably as far away as possible, for example, at the evaporator.

[0058] The positioning block extends along a block axis. The block axis can be positioned so that the center of gravity of the assembly formed by the heat pump and the support plate is located between said at least one lifting stop and the block axis.

[0059] The pedestal axis can also be positioned so that the distance between the pivot axis and the center of gravity of the assembly formed by the support plate and the heat pump is less than one external transverse dimension of the bucket taken perpendicular to the first direction. This has the advantage of positioning the pedestal close to the center of gravity and facilitating the rotation of the assembly formed by the heat pump and the support plate.

[0060] The invention further proposes a method for assembling a thermodynamic domestic hot water heating device as described above, comprising the following steps: position the support plate on the base so that the stud and the positioning imprint cooperate in the pre-assembly position, move the support plate in rotation around the first direction towards the final assembly position in which the support plate cooperates with said at least one lifting stop.

[0061] The step of moving the support plate may also include the following step, after the rotational movement of the support plate around the first direction: move the support plate in translation and rotation along at least one of the first, second and third directions, while maintaining a contact area between the stud and the positioning imprint to position the support plate in the final mounting position.

[0062] The step of moving the support plate in translation and rotation may include: at least one rotation of the support plate around one of the second and third directions, and at least one translation of the support plate along one of the second and third directions.

[0063] According to a preferred embodiment, said at least one rotation of the support plate is a rotation about the second direction. The edge of the support plate is thus oriented towards a space present below the lifting stop.

[0064] According to this preferred embodiment, said at least one translation of the support plate comprises a first translation along the first direction to lower the support plate and a second translation in a plane comprising the second and third directions to advance the edge of the plate under the lifting stop. This combination therefore comprises a rotation and two translations of the support plate following the rotation about the first direction.

[0065] The combination of one or more translations and one or more rotations of the support plate allows the support plate to cooperate with the lifting and centering stop(s). Brief description of the figures

[0066] The following description, with reference to the accompanying drawings, given by way of non-limiting examples, will clearly explain the nature of the invention and how it can be implemented. Regarding the accompanying figures: [ Fig. 1 ] illustrates, in perspective, an example of a device according to the invention; [ Fig. 2 ] illustrates, in perspective, an upper part of the device of the figure 1 including a heat pump mounted on a bucket, with one shell of the casing omitted; [ Fig. 3 ] illustrates, in perspective, a heat pump as depicted on the figure 2 in the form of a "cluster" comprising a compressor, an evaporator and a set of tubing mounted on a support plate; Fig. 4 ] illustrates, in a top view, the support plate of the figure 3 in a pre-mounted position on the bucket; [ Fig. 5 ] illustrates, in cross-section, the support plate of the figure 3 in the pre-assembled position on the bucket; [ Fig. 6 ] illustrates, in a top view, the support plate of the figure 3 in an intermediate mounting position on the bucket; [ Fig. 7 ] illustrates, in cross-section, the support plate of the figure 3in the intermediate mounting position on the bucket; [ Fig. 8 ] illustrates, in a top view, the support plate of the figure 3 in a final mounting position on the bucket; [ Fig. 9 ] illustrates, in cross-section, the support plate of the figure 3 in the final mounting position on the bucket; [ Fig. 10 ] illustrates, in cross-section and schematically, the support plate of the figure 3 in the intermediate mounting position on the bucket; [ Fig. 11 ] illustrates, in cross-section and schematically, the support plate of the figure 3 in the final mounting position on the bucket. Description of method(s) of implementation

[0067] For the sake of clarity, the same references designating the same elements according to the state of the art and according to the invention are used for all figures.

[0068] The concept of the invention is described more fully below with reference to the accompanying drawings, in which embodiments of the concept of the invention are shown. In the drawings, the size and relative sizes of the elements may be exaggerated for clarity. Similar numbers refer to similar elements in all the drawings. However, this concept of the invention can be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are offered so as to make this description complete and to communicate the scope of the concept of the invention to those skilled in the art.

[0069] A reference throughout the specification to "an embodiment" means that a particular feature, structure, or characteristic described in relation to an embodiment is included in at least one embodiment of the present invention. Thus, the appearance of the phrase "in an embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Moreover, the term "including" does not exclude other elements or steps.

[0070] We illustrated on the figures 1 to 11 an example of a thermodynamic domestic hot water heating device 1 according to the invention.

[0071] Device 1 includes a domestic hot water storage tank 2 extending along a first vertical direction Z. Tank 2 has, for example, a storage volume of 200 L.

[0072] Balloon 2 also defines a second direction X and a third direction Y, perpendicular to the first direction Z.

[0073] The ball 2 thus comprises a lower part 3, which is intended to be directed towards the ground, and an upper part 4, opposite the lower part 3. The lower part 3 can in particular be placed on the ground.

[0074] Device 1 includes a bucket 9 mounted on the upper part 4 of the balloon 2, as illustrated in view of the figure 2 notably.

[0075] The bucket 9 includes a base 8 which preferably extends in a substantially horizontal plane P, that is to say transversely to the first direction Z of the ball 2.

[0076] The bucket 9 also has a peripheral wall 10 around the bottom 8 which extends substantially perpendicularly to the bottom 8. The peripheral wall 10 extends around the first direction Z.

[0077] Device 1 includes a box 16 formed of two shells 17 and 18 mounted removably on the bucket 9. In this example, one of the shells is called the front shell 17, the other is called the rear shell 18.

[0078] Shells 17 and 18 each form a half side wall of box 30 which together form, when shells 17 and 18 are mounted on bucket 9, a side wall of box 32.

[0079] The box 16 is also formed by an upper wall of box 20.

[0080] The side wall of box 32 and the top wall of box 20 together with the bucket 9 form a receiving space 33.

[0081] Device 1 comprises, as illustrated in the view of the figure 2, a water heating module 5 comprising a heat pump 6.

[0082] Heat pump 6 includes a water heating heat exchanger (not shown) which is, for example, located inside tank 2.

[0083] The heat pump 6 also includes a second heat exchanger 7 positioned in the receiving space 33. The second heat exchanger is an evaporator 44.

[0084] Device 1 also includes an air extraction module 15 mounted on the bottom 8.

[0085] The air extraction module 15 also includes a fan 21 mounted on the bottom 8 in the receiving space 33 allowing an airflow between an air inlet 22 and an air outlet 23.

[0086] The air inlet 22 and the air outlet 23 are positioned on the upper wall of the box 20. The air extraction module 15 is configured so that the airflow passes through the second heat exchanger 7.

[0087] The air extraction module 15 may include branch connections at the inlet 22 and outlet 23.

[0088] The height Hp of the peripheral wall 10 of the bucket 9 taken perpendicular to the bottom 8, which is substantially constant, is less than the height He of the half-side wall of the box 30, and therefore of the side wall of the box 32, perpendicular to the bottom 8.

[0089] The balloon 2 comprises on a peripheral surface a mantle 37 having a lateral wall 36. The mantle 37 covers a tank, not visible in the figures.

[0090] The upper wall of box 20 can extend in a plane perpendicular to the first direction Z.

[0091] The water storage tank 2 is preferably circular in cross-section transverse to the first direction Z.

[0092] The contour of the peripheral wall 10 of the bucket 9 and the contour of the side wall of the box 32 taken transversely to the first direction Z is preferably circular.

[0093] The heat pump 6 includes a compressor 42, an evaporator 44 and a set of pipes 46. The set of pipes 46 allows, in particular, fluid circulation between the compressor 42 and the evaporator 44. The heat pump may include additional components.

[0094] With reference to the figure 3 The heat pump 6 is mounted on a support plate 40. This type of mounting of the heat pump 6 is called a "cluster" because the heat pump thus forms a single, integrated mounting unit with the support plate. Therefore, the support plate 40 and the heat pump 6 can be mounted as a single unit on the base 8.

[0095] The compressor 42, the evaporator 44 and the tubing assembly 46 are mounted on the support plate 40.

[0096] The support plate 40 includes a first portion 48 configured to receive the compressor 42 and a second portion 50 configured to receive the evaporator 44. The support plate 40 further includes a third portion 52 between the first 48 and second 50 portions.

[0097] The support plate 40 is intended to extend in the plane formed by the second X and third Y directions, or a plane parallel to it.

[0098] Device 1 includes a fastening system 54 comprising a positioning stud 56 and a positioning imprint 58.

[0099] The imprint 58 and the positioning stud 56 are configured to cooperate together when the support plate 40 is placed on the bottom 8 during its assembly.

[0100] The positioning imprint 58 is formed in the support plate in the example illustrated on the figures 3 to 11 .

[0101] The positioning footprint 58 is formed at the level of the third portion 52 of the support plate 40. The positioning footprint 58 is thus formed between the compressor 42 and the evaporator 44. The compressor 42 is the heaviest component on the support plate 40. The positioning footprint is therefore close to the center of gravity of the assembly formed by the heat pump 6 and the support plate 40. This facilitates the movement of the support plate 40 relative to a support point located at the positioning footprint 58.

[0102] The positioning imprint 58 is here a circular hole through the support plate 40. The positioning imprint 58 can be of any shape allowing cooperation with the positioning stud 56.

[0103] The positioning footprint 58 extends along a footprint axis M.

[0104] The positioning marker 56 is formed by the bottom 8 of the bucket in the example illustrated in figures 3 to 11 .

[0105] The positioning stud 56 is in the form of an extension extending from the base 8, projecting from the latter. The positioning stud extends along a stud axis S. This stud axis S is, for example, parallel to the first direction Z.

[0106] The positioning block 56 can be attached to the base 8 or formed entirely with it.

[0107] The positioning block includes an end portion 60, visible in particular at Figures 5 , 7 And 9 à 11 The end portion includes a convex surface 62. This convex surface 62 is, in particular, spherical. The end portion 60 can be of any shape allowing it to cooperate with the positioning recess 58 for mounting the support plate 40.

[0108] A contact zone 57 between the plot 56 and the positioning footprint 58 is therefore in this example a contact line.

[0109] The fixing system 54 further includes a lifting stop 64 to prevent movement of the support plate 40 along the first direction Z when the support plate 40 cooperates with the lifting stop.

[0110] The lifting stop 64 forms an outgrowth extending in a plane perpendicular to the first direction Z. A stop space is formed under this outgrowth to receive a cooperation portion 66 of the support plate 40.

[0111] The fixing system 54 further includes a plurality of centering stops 68 configured to cooperate with centering recesses 70 formed in the support plate 40.

[0112] The centering impressions 70 have a complementary shape to the corresponding centering stop 68 so that they can be nested inside each other.

[0113] Each centering stop 68 is configured to prevent movement of the support plate 40 along the second X and / or third Y directions when the support plate 40 cooperates with the centering stop 68.

[0114] The centering recesses 70 and the centering stops 68 here have a circular shape so as to prevent the movement of the support plate 40 along the second X and third Y directions when the centering stop 68 is inserted inside the centering recess 70.

[0115] THE figures 4 to 9 illustrate the different stages of mounting the support plate on the base 8.

[0116] THE Figures 4 and 5illustrate a first mounting position of the support plate 40, referred to hereafter as the pre-mounting position.

[0117] THE Figures 6 and 7 illustrate a second mounting position of the support plate 40, referred to hereafter as the intermediate mounting position.

[0118] THE figures 8 and 9 illustrate a third position of the support plate 40, hereinafter referred to as the final mounting position.

[0119] The support plate 40 is first positioned by an operator in the pre-assembly position illustrated in Figures 4 and 5 In this position, the support plate 40 is arranged so that the positioning stud 56 is inserted at least partially into the positioning recess 58. There is contact between the recess 58 and the positioning stud 56.

[0120] It is observed that in this pre-assembly position, neither of the lifting stops 64 or centering stops 68 cooperate their respective impressions.

[0121] We also observe on the figure 5 that the axes of plot S and footprint M are offset along the second X and / or third Y directions. In other words, the axes of plot S and footprint M are not coincident.

[0122] The positioning imprint 58 therefore rests partially on the positioning pad 56 at the level of a contour of the drilling forming this positioning imprint 58.

[0123] The support plate 40 is also not engaged in the lifting stop 64.

[0124] The support plate 40 is then rotated around the first Z direction to move from the pre-assembly position to the intermediate assembly position illustrated in Figures 6 and 7 .

[0125] The axes of the S-shaped block and the M-shaped footprint are always offset along the second X and / or third Y directions. The cooperation portion 66 of the support plate 40 has moved closer to the lifting stop 64 but is not yet cooperating with it. The same is true of the centering footprints 70, which have moved closer to the centering stops 68 but are not yet cooperating with them.

[0126] A combined movement of the support plate 40 is performed by an operator to move the support plate 40 from the intermediate mounting position to the final mounting position illustrated in figures 8 and 9 .

[0127] This combined movement is shown schematically in the diagram. Figures 10 and 11 . There Figure 10 illustrated in position between the intermediate and final mounting positions. figure 11 illustrates the final mounting position.

[0128] The term "combined" movement refers to the fact that all the movements considered are simultaneous.

[0129] The combined displacement includes a rotation of the support plate 40 around an axis lying in a plane YX defined by the second X and third Y directions. The combined displacement further includes a first translation along the first Z direction and a second translation along an axis lying in a plane YX.

[0130] We observe that the contact zone 57 between the Figures 10 and 11 follows the profile of the positioning pin 56. The positioning pin 56 acts as a cam profile and the positioning recess 58 as a cam follower. The spherical profile of the positioning pin 56 allows the operator to perform this combination of movements, or combined displacement, simply by sliding the support plate 40 along the profile formed by the positioning pin 56.

[0131] In particular, we observe that the contact area 57 in the final mounting position is lower along the first Z direction compared to the intermediate mounting position.

[0132] The cam profile formed by the positioning pin 56 allows, on the one hand, the cooperation portion 66 to insert itself under the lifting stop 64 and, on the other hand, the centering stops 68 to insert themselves into the centering recesses 70 of the support plate 40.

[0133] The axes of stud S and footprint M coincide in the final mounting position.

[0134] The base 8 comprises various bearing areas for the support plate 40. A first bearing area corresponds to the contact area 57 between the positioning pin 56 and the positioning recess 58. A second bearing area 72 is located at the compressor 42. This second bearing area includes several ribs. A third bearing area 74 is located at the evaporator 44.

[0135] An additional fixing may be made at the level of the evaporator 44 between the support plate 40 and the bottom 8. This additional fixing is, for example, screwed.

[0136] Furthermore, device 1 also includes a connecting piece 80 disposed between the fan 21 and the upper wall of the casing 20. The connecting piece 80 is configured to connect the fan 21 to the evaporator 44. To this end, the connecting piece 80 includes a connecting relief 82 configured to cooperate with a first relief 84 formed on the evaporator 44 and a second relief 86 formed on the fan 21. The connecting relief 82 notably allows the first 84 and second 86 reliefs to be kept connected to each other along an axis contained in a plane parallel to the YX plane.

[0137] The junction piece 80 is also configured to position and fix the fan 21 to the upper wall of the box 20.

[0138] The joining piece includes an overthickness (not visible) configured to fit, at least partially, into a ventilation opening formed in the upper wall of the box 20. This ventilation opening is here the air outlet 23.

[0139] This extra thickness allows the connecting piece 80, and therefore the fan 21 and the evaporator 44, to be centered in relation to the upper wall of the casing 20. This connecting piece thus helps to reinforce the positioning and retention of the fan 21 and also of the heat pump 6.

Claims

1. A thermodynamic domestic hot water heating device (1) comprising: - a water storage tank (2) extending along a first direction (Z), the storage tank defining a second (X) and a third (Y) direction perpendicular to the first direction (Z); - a bucket (9) mounted on an upper part (4) of the tank (2), the bucket (9) forming a base (8) and comprising a peripheral wall (10) extending from and around the base (8) to form at least partially a receiving space (33); - a casing (16) for forming at least partially with the bucket (9) the receiving space (33); - a water heating module (5) comprising a heat pump (6) mounted on a support plate intended to rest on the base (8); - a fastening system (54) for the support plate (40) on the base (8) characterized in thatthe fastening system includes at least one lifting stop (64) configured to prevent movement of the support plate (40) along the first direction (Z) when the support plate cooperates with the lifting stop, the fastening system (54) further including a positioning stud (56) and a positioning footprint (58) configured to cooperate with the positioning stud (56) so as to permit rotation of the support plate (40) from a pre-mounting position to a final mounting position in which the support plate (40) cooperates with said at least one lifting stop (58) to prevent movement of the support plate (40) along the first direction (Z).

2. Device (1) according to claim 1, wherein the heat pump (6) and the support plate (40) form a fixed mounting subassembly configured to be mounted on the bottom (8) of the bucket (9).

3. Device (1) according to claim 1 or 2, wherein the heat pump (6) comprises a compressor (42), a heat exchanger (7), a set of tubing (46) fixed to the support plate (40).

4. Device (1) according to any one of the preceding claims, wherein the positioning stud (56) is formed on the support plate (40) or the bottom (8) of the bucket (9), the positioning imprint (58) being formed by the other between the support plate and the bottom (8) of the bucket (9).

5. Device (1) according to any one of the preceding claims, wherein the positioning pin (56) defines a cam profile and the positioning footprint (58) defines a cam follower configured to follow the cam profile.

6. Device (1) according to claim 5, wherein the cam profile is formed by an end portion of the stud comprising an end portion, the end portion having a convex surface (62), preferably spherical.

7. Device (1) according to claim 5, wherein the fastening system (54) further comprises at least one centering stop (68) to prevent movement of the support plate (40) along the second (X) and / or third (Y) directions when the support plate (40) is in the final mounting position.

8. Device (1) according to any one of the preceding claims, wherein the base (8) comprises a bearing area with the support plate between the stud (56) and the positioning imprint (58), the base (8) further comprising at least one additional bearing area for the support plate when the support plate (40) is in the final mounting position.

9. Device (1) according to any one of the preceding claims, wherein the positioning stud (56) extends along a stud axis (S), the stud axis (S) being positioned so that the center of gravity of the assembly formed by the heat pump (6) and the support plate (40) is disposed between said at least one lifting stop (64) and the stud axis (S).

10. Method of mounting a thermodynamic domestic hot water heating device (1) according to any one of the preceding claims, comprising the following steps: - placing the support plate (40) on the base (8) so as to make the lug (56) and the positioning imprint (58) cooperate in the pre-mounting position, - moving the support plate (40) in rotation around the first direction (Z) towards the final mounting position in which the support plate (40) cooperates with said at least one lifting stop (64).

11. Assembly method according to the preceding claim, wherein the step of moving the support plate (40) also includes the following step, after the rotational movement of the support plate (40) around the first direction (Z): - moving the support plate (40) in translation and rotation along at least one of the first (Z), second (X) and third (Y) directions, while maintaining a contact area (57) between the stud and the positioning imprint (58) to position the support plate in the final mounting position.

12. Assembly method according to the preceding claim, wherein the step of moving the support plate (40) in translation and rotation comprises: - at least one rotation of the support plate around one of the second (X) and third (Y) directions, and - at least one translation of the support plate along one of the second (X) and third (Y) directions.

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