Thermodynamic domestic hot water heating system comprising a pre-assembled unit requiring no tools or screw assembly

Abstract

The invention relates to a thermodynamic domestic hot water heating device comprising: - a water storage tank extending along a principal direction; - a bucket (9) mounted on an upper part of the tank; - a casing forming a casing side wall (32) and a casing top surface to form, at least partially with the bucket (9), the receiving space, the casing comprising a first shell (18) and a second shell; - a water heating module comprising a heat pump, at least a part of the heat pump being disposed in the receiving space; characterized in that it further comprises a fastening system between the first shell (18) and the bucket (9), the fastening system being configured to fix the first shell (18) removably onto the bucket (9) without tools and without screw assembly. Figure for the abstract: Figure 5

Description

Title of the invention: Thermodynamic domestic hot water heating device comprising a pre-assembled unit requiring no tools or screw assembly. 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 devices that use the calories present in the surrounding air. They are thus called "monoblocs" in that they allow the production of hot water and the ventilation of a building.

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

[0004] The two shells are often held in position on the device by screwing them together in two ways: the first and most important is screwing one of the shells onto the bucket, and the second is screwing the two shells together. In these cases, the shells are not designed to be fixed independently. Furthermore, without screwing the first shell, it will not stay in place on its own if subjected to even a slight pushing force. The first shell is in equilibrium. This solution is not optimal because assembling the shells is difficult, particularly due to limited access (assembly, maintenance, etc.). Indeed, the first shell must be positioned on the bucket, then the second shell must be brought close, while holding the first shell with one hand, or hoping that it will stay in position.This also poses a problem during heat pump maintenance, as opening the casing carries the risk of dropping one of the shells, particularly the rear shell, which is difficult to access once installed at the customer's site. Screwing it in also requires the use of specialized tools, which ties up one of the installer's hands and therefore limits their ability to handle the shell(s). Furthermore, the tool is often inaccessible during maintenance.

[0005] To facilitate the assembly of the shells on the device, it is known to fix a first shell by screwing it onto the outer mantle of the balloon.

[0006] There is a need to further improve the assembly of the casing of thermodynamic water heating devices to simplify assembly while ensuring an aesthetic external appearance. Summary of the invention

[0007] To this end, the invention proposes a thermodynamic domestic hot water heating device comprising: - a water storage tank; - a bucket mounted on an upper part of the balloon, 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 forming a side wall of the box and a top wall of the box to form at least partially with the bucket the receiving space, the box comprising a first shell and a second shell; - a water heating module including a heat pump, at least part of the heat pump being located in the reception area; characterized in that it further comprises a fastening system between the first shell and the bucket, the fastening system being configured to fix the first shell removably onto the bucket without tools and without screw assembly.

[0008] In the present invention, a configuration in which the first shell and / or the bucket are configured to be removably attached to one another allows for "pre-assembly" of the first shell. This operation is performed without tools or screws, thus allowing the installer to use both hands to handle the shell. The assembly operation is therefore simplified, as the first shell is pre-attached before final fixing. It is therefore unnecessary to hold the first shell or risk it falling during its final fixing.

[0009] Furthermore, no external screwing is required to attach the first shell to the bucket, which also results in a more aesthetically pleasing external appearance for the device. In particular, the external surface of the water storage tank can be flush with the external surface of the container.

[0010] More particularly, the water storage tank may include a tank covered at least on a peripheral surface by a side wall of a mantle, the side wall of the casing extending in line with the side wall of the mantle.

[0011] In particular, the outer surface of the side wall of said mantle preferably extends in continuity with an outer surface of the side wall of the box.

[0012] The balloon can extend along a main vertical direction.

[0013] The side wall of the mantle can surround the tank around the main direction.

[0014] The bottom of the bucket can extend in a plane perpendicular to the main direction.

[0015] The peripheral wall of the bucket can extend from the bottom around the main direction and substantially parallel to the main direction.

[0016] The side wall of the box can extend around the main direction and substantially parallel to the main direction.

[0017] The upper wall of the box can extend in a plane perpendicular to the main direction.

[0018] The water storage tank preferably has a circular cross-section transverse to the main direction.

[0019] The contour of the peripheral wall of the bucket and / or the contour of the side wall of the box taken transversely to the main direction can be polygonal, for example rectangular or square, oval or circular.

[0020] The water storage tank preferably includes thermal insulation positioned between the tank and the jacket.

[0021] The side wall of the box can overlap, preferably totally, the peripheral wall of the bucket.

[0022] The second shell can be removably attached to the first shell, each shell forming a half of the side wall of the box. The half of the side walls of the box thus form the side wall of the box.

[0023] The housing may include an upper wall removably attached to the first and second shells. The upper wall forms, at least partially, the receiving space with the side wall of the housing.

[0024] The shells can be configured to be elastically deformed when mounted on the device, in particular on the bucket.

[0025] The deformation of the side half-wall during the assembly of the first shell and / or shells may include a bending around an axis parallel to the main direction to initiate a displacement of each of the end edges of the side half-wall.

[0026] Each of the side walls of the box can extend along an angular sector around the main direction, in particular an angular sector around the main direction of 180°.

[0027] The term "half-wall" refers to a side wall comprising two wall portions to form the entire side wall. However, this formulation does not imply that the angular sector around the principal direction is necessarily 180°. The same applies to other elements using a formulation with "half".

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

[0029] The first shell and / or the bucket can be configured to be attached to each other without tools.

[0030] The bucket and / the first shell can be configured to cooperate by snapping to allow fixing between the bucket and the first shell.

[0031] The bucket and / or the first shell can be configured to hold the first shell in position on the bucket along the main direction and along at least one direction transverse to the main direction. Preferably, the bucket and / or the first shell are configured to hold the first shell in position on the bucket along the main direction and along at least two directions transverse to the main direction.

[0032] The fastening system is configured to allow the first shell to be held on the bucket without tools or screw assembly.

[0033] The fastening system may include at least one male relief and at least one female relief configured to cooperate together to fix the first shell onto the bucket.

[0034] The male and / or female reliefs can be configured to cooperate together so as to generate a resisting tilting torque of the first shell around at least one axis perpendicular to the main direction.

[0035] This resisting tilting couple is obtained, for example, by means of at least one stop formed by one of the male and female reliefs, or by pinching one of the male and female reliefs. Alternatively, a combination of pinching and at least one stop can be achieved.

[0036] The male and / or female reliefs can form a stop configured to prevent a displacement of the first shell relative to the bucket along the main direction and along at least one direction transverse to the main direction.

[0037] The female relief can be borne by the first shell and the male relief can be borne by the bucket. Alternatively, the female relief can be borne by the bucket and the male relief can be borne by the first shell.

[0038] The female relief can be in the form of an engagement organ, for example formed by a hook defining a reception space for the male relief.

[0039] The male relief may be in the form of a convex edge configured to fit inside a receiving space formed by the female relief. The convex edge may be the rim of the bucket.

[0040] The male and female reliefs can be configured to cooperate by snapping together to allow attachment between the bucket and the first shell. Thus, the male and / or female relief are configured to deform elastically to cooperate together and thereby allow the attachment of the first shell to the bucket.

[0041] Said at least one female relief may comprise at least one deformable engagement member formed on the first shell and configured to cooperate, through the elastic deformation of said at least one engagement member during the assembly of the first shell on the bucket, with the peripheral wall of the bucket for the removable attachment of the first shell on the bucket.

[0042] The first shell may include at least one deformable engagement member configured to cooperate, through the elastic deformation of said at least one engagement member during the mounting of the first shell on the bucket, with the peripheral wall of the bucket for the removable attachment of the first shell to the bucket.

[0043] The elastic deformation of said at least one engagement member allows the first shell to be moved from an intermediate mounting position to a final mounting position. Said engagement member may have several deformation states. Said engagement member may, for example, have a first and a second deformation state when the first shell is in the intermediate and final mounting positions, respectively. The deformation of said engagement member in the first state is preferably greater than that in the second state. The presence of elastic deformation in the second state ensures that a force is applied by said engagement member to the bucket to improve the retention of the first shell on the bucket.

[0044] Said at least one engagement member may extend from an inner wall of the first shell to be positioned overlapping an upper edge of the peripheral wall of the bucket when the first shell is attached to the bucket.

[0045] Said at least one engagement member is for example in the form of a hook or a flap folded towards the bottom of the bucket when the first shell is placed on the upper edge of the peripheral wall.

[0046] Said at least one engagement member is preferably configured to hold the first shell in position on the bucket along at least one direction transverse to the main direction.

[0047] Said at least one engagement member may form a stop along at least one direction transverse to the main direction.

[0048] The heating device preferably includes a plurality of engagement members to improve the retention of the first shell on the bucket and thus limit the risk of the first shell falling or disengaging.

[0049] The heating device preferably comprises at least three engagement elements arranged at a first end, a second end, and a central area of ​​the first shell around the principal direction. This improves the retention of the first shell on the bucket.

[0050] The heating device may further include a keying system configured to angularly position said at least one engagement member around the main direction.

[0051] The error-proofing system may include at least one error-proofing housing formed by the peripheral wall of the bucket and configured to receive said at least one engagement member, said at least one error-proofing housing being complementary in dimension with said at least one engagement member and having a predetermined angular position to position the first shell vis-à-vis the bucket around the main direction.

[0052] The bucket and the first shell may include a device for fixing the first shell relative to the bucket.

[0053] Said fastening device may include at least one male fastening impression and at least one female fastening impression configured to cooperate together when the first shell is attached to the bucket.

[0054] The male and female imprints preferably extend around the main direction.

[0055] The male imprint is for example formed on an external face of the peripheral wall of the bucket.

[0056] The female imprint is for example formed on the inner wall of the first shell.

[0057] The male imprint is for example a rib or a protruding element of the surface from which it extends.

[0058] The female indentation is, for example, a groove formed in the surface at which it is formed. This groove can be formed by material removal or by two protrusions forming the upper and lower limits of the groove. In the latter case, the groove can be formed by two ribs.

[0059] The female and male impressions are preferably complementary in shape and / or size so as to allow the insertion of the male impression into the female impression.

[0060] The female and male imprints are arranged so that the male imprint faces the female imprint when the first shell is mounted on the bucket.

[0061] The male and female prints can extend discontinuously. Thus, the male and female prints can comprise a plurality of male and female print portions which together form the male and female prints.

[0062] The male and female imprint portions can be distributed along the first shell around the main direction.

[0063] The heating device preferably comprises at least two portions of male and female impressions. A first portion of male and female impressions is disposed at the first end of the first shell and a second portion of male and female impressions is disposed at the second end of the first shell.

[0064] The radial dimension of the male socket with respect to the principal direction is predetermined to be equal to or less than the permissible displacement of the first and second ends of the first shell during its deformation. During assembly or disassembly, it is thus possible to deform the lateral wall of the housing formed by the first shell to disengage the male socket from the female socket.

[0065] Said fastening device is preferably configured to hold the first shell in position on the bucket along the main direction.

[0066] Said fastening device can form a stop along the main direction.

[0067] Said at least one engagement member can be configured to deform at contact of the peripheral wall under a predetermined mounting force so as to permit access of the male fixing impression into the female fixing impression, said at least one engagement member also being configured to exert a force on the peripheral wall to retain the male fixing impression in the female fixing impression when the first shell is fixed to the bucket.

[0068] Said at least one engagement member is preferably located near a fastening device. Thus, the engagement member acts as a stop preventing the male impression from disengaging from the female impression. This stop is therefore deformable under a certain predetermined force corresponding to the force required to mount the first shell onto the bucket. To disengage the male impression from the female impression, the user must apply this predetermined force, sufficiently deforming the engagement member until it disengages. The proximity between the engagement member and the fastening device ensures better retention of the first shell on the bucket.

[0069] 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 box perpendicular to the bottom.

[0070] The heat pump may include a first water heating heat exchanger and a second heat exchanger, the second heat exchanger being positioned in the receiving space, in particular on the bottom.

[0071] The enclosure may include an air inlet and an air outlet.

[0072] The extraction module can be configured to create an airflow through the second heat exchanger.

[0073] 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.

[0074] The storage tank can have a water storage volume of between 50 l and 300 l.

[0075] All the characteristics described for the first shell apply to the second shell.

[0076] The first and second shells can be fixed to each other to complete the assembly of the container onto the bucket. This fixing can be a screw fixing. Brief description of the figures

[0077] The following description, with reference to the accompanying drawings, given by way of non-limiting examples, will clearly explain what the invention consists of and how it can be implemented. In the accompanying figures:

[0078] [Fig-1] illustrates, in perspective, an example of a device according to the invention;

[0079] [Fig.2] illustrates, in perspective, an upper part of the device of [Fig.1], a shell of the caisson being omitted;

[0080] [Fig.3] illustrates, in perspective, a shell of the box of the device of the [Fig.1];

[0081] [Fig.4] illustrates, in perspective and in detail, a portion of the shell of the housing of the device of the [Fig.l];

[0082] [Fig.5] illustrates, in cross-section, a first step in mounting the shell onto a bucket of the device's housing [Fig.1];

[0083] [Fig.6] illustrates, in cross-section, a second stage of mounting the shell onto a bucket of the device's housing [Fig.1];

[0084] [Fig.7] illustrates, in cross-section, a third step in mounting the shell onto a bucket of the device's housing [Fig.1];

[0085] [Fig.8] illustrates, in perspective and in detail, a portion of the shell of the housing of the device in [Fig.1] including a keying system. Description of method(s) of implementation

[0086] 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.

[0087] 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.

[0088] A reference throughout the specification to "an embodiment" means that a particular functionality, structure, or feature 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" at various locations throughout the specification does not necessarily refer to the same embodiment. embodiment. Furthermore, the functionalities, structures, or special characteristics can be combined in any suitable way in one or more embodiments. Moreover, the term "including" does not exclude other elements or steps.

[0089] Figures 1 to 8 illustrate an example of a thermodynamic domestic hot water heating device 1 according to the invention.

[0090] The device 1 includes a domestic hot water storage tank 2 extending along a main vertical direction X. The tank 2 has, for example, a storage volume of 200 l.

[0091] The balloon 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.

[0092] Device 1 includes a bucket 9 mounted on the upper part 4 of the balloon 2, as illustrated in particular in the view of [Fig.2].

[0093] The bucket 9 includes a bottom 8 which preferably extends in a substantially horizontal plane P, that is to say transversely to the main direction X of the balloon 2.

[0094] 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 main direction X.

[0095] The device 1 comprises 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.

[0096] The shells 17 and 18 each form a half of the side wall of the box 30 which together form, when the shells 17 and 18 are mounted on the bucket 9, a side wall of the box 32.

[0097] The box 16 is also formed by an upper wall of box 20.

[0098] The side wall of the box 32 and the top wall of the box 20 together with the bucket 9 form a receiving space 33.

[0099] Device 1 comprises, as illustrated in the view of [Fig.2], a water heating module 5 comprising a heat pump 6.

[0100] The heat pump 6 includes a water heating heat exchanger (not shown) which is, for example, located inside the tank 2.

[0101] The heat pump 6 further comprises a second heat exchanger 7 positioned in the receiving space 33.

[0102] The device 1 also includes an air extraction module 15 mounted on the bottom 8.

[0103] The air extraction module 15 further 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.

[0104] 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.

[0105] The air extraction module 15 may include branch connections at the inlet 22 and outlet 23.

[0106] 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 of the side wall of the box 30, and therefore of the side wall of the box 32, perpendicular to the bottom 8.

[0107] 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.

[0108] As illustrated in particular in figures 1, 2 and 7, the side wall of the caisson 32 extends in line with the side wall 36 of the mantle 37.

[0109] In particular, the outer surface of the side wall 36 of the mantle 37 preferably extends in continuity with the outer surface of the side wall of the caisson 32.

[0110] Each shell 17 and 18 is configured to be removably mounted on the bucket 9 by a movement along a mounting axis T parallel to the main direction X. Thus, each shell is preferably configured to be mounted on the bucket in a substantially vertical plane.

[0111] For this mounting on the bucket 9, the shells 17 and 18 are configured to deform elastically by bending around an axis parallel to the main direction X to initiate a lateral displacement Dt of each of the end edges 35 of the lateral half-wall 30. The lateral displacement Dt is carried out along an axis substantially perpendicular to the main direction X, and therefore to the mounting axis T.

[0112] The side wall 36 of the mantle 37 can surround the tank around the main direction X.

[0113] The side wall of the box 32 can extend around the main direction X and substantially parallel to the main direction X.

[0114] The upper wall of the box 20 can extend in a plane perpendicular to the main direction X.

[0115] The water storage tank 2 preferably has a circular cross-section transverse to the main direction X.

[0116] 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 main direction X is preferably circular.

[0117] The first shell 18 can be removably attached to the bucket 9 without the need for any special tools. In particular, the first shell 18 can be attached to the bucket by snapping it into place. Mounting the first shell 18 onto the bucket 9 does not involve any screws between the bucket 9 and the first shell 18.

[0118] With reference to figures 3 and 4, the heating device 1 also includes three engagement members 40 and a fixing device 42.

[0119] Each engagement member 40 is configured to deform elastically in order to allow engagement of the engagement member 40 on the upper edge 11 of the peripheral wall 10.

[0120] Each engagement member 40 extends from the inner wall 54 of the first shell 18.

[0121] Each engagement member 40 includes a hook 44 configured to engage on the upper edge of the peripheral wall 10 of the bucket 9. In particular, the hook 44 covers this upper edge 11 when the first shell 18 is disposed on the bucket 9, as seen in [Fig.7].

[0122] With reference to figures 5 to 7, an engagement member is illustrated respectively in a rest state on [Fig.5], a first engagement state on [Fig.6] and a second engagement state on [Fig.7].

[0123] In its rest state, the engagement member does not undergo any elastic deformation. In the first engagement state, the engagement member 40 deforms upon contact with the upper edge 11 of the peripheral wall 10 of the bucket 9. The hook 44 deforms to increase the available space under the hook 44, thus allowing access to this upper edge 11 inside the hook 44. In the second engagement state, the engagement member 40 is either in a deformed state that maintains a force against the peripheral wall 10 or in an undeformed state.

[0124] The fastening device 42 is configured to hold the first shell 18 in position on the bucket 9 along the main direction X. The fastening device 42 thus forms a stop along the main direction X.

[0125] The fastening device 42 includes at least one female fastening recess 48 visible in Figures 3 to 7 and at least one male fastening recess 46 visible in Figures 5 to 7.

[0126] The male 46 and female 48 impressions are configured to cooperate together when the first shell 18 is attached to the bucket 9. In particular, the male impression 46 is configured to fit inside the female impression 48.

[0127] The male 46 and female 48 impressions extend around the main direction X.

[0128] The male 46 and female 48 impressions are here arranged at each edge end 35 of the first shell 18.

[0129] As seen in [Fig.5], the male impression 46 is formed on an external face 50 of the peripheral wall 10 of the bucket 9. The male impression 46 is here formed by a fixing rib 52. The fixing rib 52 extends in depth along a radial direction to the main direction X and around the main direction X.

[0130] The female imprint 48 is formed on the inner wall of the first shell 18. As can be seen in [Fig.5], the female imprint 48 may be discontinuous.

[0131] The female impression 48 is here a groove 56 formed on the inner wall 54 of the first shell 18. This groove 56 is formed by two boundary ribs forming the upper and lower limits of the groove 56. The boundary ribs extend in depth along a radial direction to the principal direction X and around the principal direction X.

[0132] The female impression 48 and male impression 46 are complementary in shape and size so as to allow the insertion of the male impression 46 into the female impression 48.

[0133] The female imprint 48 and male imprint 46 are arranged so that the male imprint 46 faces the female imprint 48 when the first shell 18 is mounted on the bucket 9.

[0134] The heating device 1 may further include a keying system 60 configured to angularly position said at least one engagement member 40 around the main direction X. The keying system is visible in [Fig.8].

[0135] The error-proofing system includes an error-proofing housing 62 formed by the peripheral wall 10 of the bucket 9. In particular, the error-proofing housing 62 is formed by an internal face of the peripheral wall 10.

[0136] The keying housing 62 is configured to receive an engagement member 40.

[0137] The keying housing 62 is formed at the level of a central angular extension portion of the first shell 18.

[0138] The error-proofing housing 62 is complementary in size to the engagement element 40.

[0139] The keying housing 62 has a predetermined angular position for positioning the first shell 18 opposite the bucket 9 around the main direction X.

[0140] The keying housing 62 is formed by a space present between keying ribs 64 formed on the inner face of the peripheral wall 10. To limit the material used for the bucket 9, the secondary spaces adjacent to the keying housing 62 left between the keying ribs 64 have dimensions smaller than the dimensions of the engagement member to prevent its insertion.

[0141] The procedure for mounting the first shell 18 onto the bucket 9 is as follows.

[0142] The first shell 18 is positioned above the bucket 9 so as to place the engagement members above the upper edge 11 of the peripheral wall 10. This step is illustrated in [Fig.5].

[0143] The first shell 18 is also oriented angularly around the principal direction X so as to match an engagement member with the keying housing.

[0144] The first shell 18 is then lowered along the main direction X so as to bring the engagement members 40 into contact with the upper edge 11. A predetermined force is then applied by a user to the bucket 9 via the first shell 18, which causes a local deformation of each of the engagement members 40. This deformation of the engagement member, combined with a deformation of the side wall 32 of the first shell 18, makes it possible to move the fastening device 42 away from the peripheral wall 10. This step is illustrated in [Fig. 6].

[0145] Next, the first shell 18 is lowered further along the main X direction until the female 48 and male 46 impressions are facing each other. The male impression 46 is engaged with the female impression 48 to complete the assembly.

[0146] Although not illustrated, the shell 17, or front shell, may also include all the elements described for the shell 18, or rear shell, in particular with regard to said at least one engagement member 40, the fastening device 42 and the error-proofing system 60.

Claims

Demands

1. A thermodynamic domestic hot water heating device (1) comprising: - a water storage tank (2) extending along a principal direction (X); - a bucket (9) mounted on an upper part (4) of the tank (2), the bucket (9) forming a bottom (8) and comprising a peripheral wall (10) extending from and around the bottom (8) to form at least partially a receiving space (33); - a casing (16) forming a casing side wall (32) and a casing top surface (20) to form at least partially with the bucket (9) the receiving space (33), the casing (16) comprising a first shell (18) and a second shell (17); - a water heating module (5) comprising a heat pump (6), at least a part of the heat pump (6) being disposed in the receiving space (33);characterized in that it further comprises a fastening system between the first shell (18) and the bucket (9), the fastening system being configured to fix the first shell (18) removably onto the bucket (9) without tools and without screw assembly;

2. Device (1) according to claim 1, wherein the fastening system comprises at least one male relief and at least one female relief configured to cooperate together to fix the first shell onto the bucket.

3. Device (1) according to claim 2, wherein the male and / or female reliefs are configured to cooperate together so as to generate a resisting tilting torque of the first shell about at least one axis perpendicular to the principal direction (X).

4. Device (1) according to claim 2 or 3, wherein the male and female reliefs are configured to cooperate by snapping to allow fixing between the bucket (9) and the first shell (18).

5. Device (1) according to any one of the preceding claims 2 to 4, wherein the male and / or female relief forms a stop configured to prevent displacement of the first shell (18) relative to the bucket (9) along the principal direction (X) and along at least one direction transverse to the main direction (X).

6. Device (1) according to any one of the preceding claims 2 to 5, said at least one female relief comprises at least one deformable engagement member formed on the first shell (18) and configured to cooperate, through the elastic deformation of said at least one engagement member during the mounting of the first shell (18) on the bucket (9), with the peripheral wall (10) of the bucket (9) for the removable attachment of the first shell (18) on the bucket (9).

7. Device according to claim 6, wherein said at least one engagement member extends from an inner wall of the first shell to be positioned overlapping an upper edge of the peripheral wall (10) of the bucket (9) when the first shell (18) is fixed to the bucket (9).

8. Device (1) according to claim 6 or 7, further comprising a keying system configured to angularly position said at least one engagement member around the main direction (X).

9. Device according to claim 8, wherein the error-proofing system comprises at least one error-proofing housing formed by the peripheral wall (10) of the bucket (9) and configured to receive said at least one engagement member, said at least one error-proofing housing being dimensionally complementary to said at least one engagement member and having a predetermined angular position to position the first shell (18) vis-à-vis the bucket (9) around the principal direction (X).

10. Device according to any one of the preceding claims 2 to 9, wherein the fastening system further comprises at least one male fastening impression and at least one female fastening impression configured to cooperate together when the first shell (18) is attached to the bucket (9).

11. A device according to any one of the preceding claims in combination with claims 6 and 9, wherein said at least one engaging member is configured to deform upon contact with the peripheral wall (10) under a predetermined mounting force so as to permit access of the male fastening recess into the female fastening recess, said at least one engagement member also being configured to exert a force on the peripheral wall (10) of retaining the male fixing impression in the female fixing impression when the first shell (18) is fixed to the bucket (9).

Images