JP2020034217A - Exterior package case for hot water unit, and hot water unit including the same - Google Patents

Abstract

To provide an exterior package case for a hot water unit, capable of being appropriately manufactured at a low cost with good productivity by simple working processes even when applying complicated patterns, and capable of improving the whole designability.SOLUTION: An exterior package case C is used for storing in the inside a hot water device 1 for hot water generation or hot water storage. An ink jet printing layer 4 showing at least one of characters, symbols, figures and patterns is provided on a paint layer 30b or 30c of a metal plate constituting the exterior package case C, and a clear layer 5 covering the printing layer is further provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot water unit in which a hot water device for generating or storing hot water, such as a hot water supply device or a cogeneration system, is housed in an outer case, and an outer case thereof.

  As a specific example of the hot water unit configured as a hot water supply device, for example, there is a hot water unit that performs hot water heating using combustion gas generated by a burner and is housed in an outer case (for example, Patent Documents 1 to 3). 3). Such an outer case for a hot water unit is generally manufactured by pressing a color steel plate having a single color surface.

  In such a hot water unit, for example, characters or symbols indicating the manufacturer name, type, or ability of the hot water unit are displayed on the outer case, and a wide range of the outer case surface is defined as the ground color of the surface of the color steel plate. Different predetermined colors may be required. In this case, conventionally, components of the outer case (the outer case main body and the cover) are formed by press molding, and then the components are coated by a spray method.

  However, there is room for improvement in the prior art as described below.

That is, when the conventional spray-type coating means is used, masking processing for unpainted parts and color matching of paint are troublesome, and spraying of paint using a spray gun (air gun) is troublesome. Yes, and requires skill. Therefore, workability and productivity are poor. Further, since the paint is sprayed on the masking portion and the like, the paint is wasteful. Therefore, the manufacturing cost of the outer case and, consequently, the manufacturing cost of the hot water unit become high. Such inconvenience becomes more remarkable as the pattern to be painted becomes more complex and the number of colors increases, and it is also difficult to express fine patterns.
Heretofore, a transfer type coating means has been appropriately adopted, but according to this type of coating means, a transfer plate is required, which increases the cost. In addition, there is a problem that it is not suitable for painting a large area.
Further, the coating applied to the outer case is easily damaged by the influence of wind, rain, sun rays including ultraviolet rays, and the like, and is liable to cause contamination and fading.

JP 2012-32029 A JP-A-11-294867 JP 2014-40950 A

  The present invention has been conceived under the circumstances as described above. Even when a complicated pattern or the like is to be provided, the present invention can be appropriately manufactured with good productivity at a low cost and a simple work process. An object of the present invention is to provide an outer case for a hot water unit, which can improve the overall design, and a hot water unit having the same.

  In order to solve the above problems, the present invention takes the following technical measures.

An outer case for a hot water unit provided by the first aspect of the present invention is an outer case for a hot water unit used to house therein a hot water device for generating or storing hot water, and the outer case is provided. The case is configured using a metal plate, and at least one of an outer surface and an inner surface of the metal plate is provided with a paint layer, and is provided by being laminated on the paint layer, and includes a character, a symbol, and a figure. , Or a pattern, and a clear layer covering the ink-jet printing layer.
Here, the inkjet printing layer is a printing layer formed by using an inkjet printer and spraying ink droplets formed into fine droplets onto a coating target area.

According to such a configuration, the following effects can be obtained.
That is, since the ink jet printing layer is further provided on the paint layer provided on at least one of the outer surface and the inner surface of the metal plate constituting the outer case, the desired characters, symbols, figures, or patterns can be appropriately formed. It is possible to represent. As the metal plate provided with the paint layer, for example, a color steel plate can be used as it is. On the other hand, the inkjet printing layer can be easily provided using an inkjet printer, and unlike the conventional spray coating, masking treatment and color matching of the paint to the outer case are unnecessary, No skill is required. Further, unlike the conventional transfer type coating, a transfer plate is not required, and a large area can be easily coated. Therefore, the workability of the coating is good, and the productivity of the outer case can be increased. Furthermore, since the ink-jet printing layer can be provided only at a desired position, waste of ink paint can be eliminated or reduced. As a result, it is possible to reduce the manufacturing cost of the outer case, and eventually the manufacturing cost of the hot water unit.
Further, according to the ink jet printing layer, a pattern having a complicated shape and a pattern in which colors are frequently used can be expressed finely, which is more preferable in improving the appearance of the hot water unit. In particular, according to the present invention, the presence of the clear layer enables various expressions such as glossy and glossless, which is more preferable.
The ink-jet printing layer can be protected by a clear layer, so that it is not easily damaged by the influence of wind and rain, the weather resistance is improved, and the stain resistance is also provided. .

  Preferably, the clear layer contains an ultraviolet absorber.

  According to such a configuration, it is possible to appropriately prevent the ink jet print layer from being discolored by the irradiation of the ultraviolet rays included in the sun rays or the like.

  Preferably, the outer case for a hot water unit according to the present invention includes an outer case main body having at least one surface formed with an opening, and a cover attached to the outer case main body so as to close the opening. The ink jet printing layer and the clear layer are provided on at least one of the outer case body and the cover body.

  Preferably, the outer case for a hot water unit according to the present invention has a drawn portion, and, in the drawn portion, a portion where the thickness of the metal plate is smaller than other portions, The thickness of the ink jet printing layer is also smaller than the other portions.

According to such a configuration, the following effects can be obtained.
That is, in the case where the drawing portion is provided after the ink jet printing layer is provided on the outer case, if the thickness of the entire ink jet printing layer of the drawing portion is large and uniform, the drawing amount of the metal plate is reduced. The ink jet printing layer may be peeled off at the increased portion (a portion of the drawn portion where the plate thickness is smaller than other portions). In contrast,
According to the above configuration, such a fear can be appropriately avoided.

  Preferably, the outer case for a hot water unit according to the present invention includes a burring hole provided with a burring portion protruding from a peripheral portion, and the burring portion includes an inkjet printing layer provided in a peripheral portion of the burring hole. Are provided, and these ink-jet printing layers are successively covered by the clear layer.

  According to such a configuration, the peripheral portion of the burring hole and the burring portion can be painted in a state of a series of connected colors or patterns, and the appearance of this portion can be improved. It is. Unlike the above-described configuration, for example, when the inkjet printing layer is provided only in the peripheral portion of the burring hole and the inkjet printing layer is not provided in the burring portion, the burring portion may be seen as an unsightly portion from the outside. However, according to the above configuration, such a fear can be eliminated. Also, originally, the ink jet printing layer provided in the burring portion or the like is apt to cause peeling or cracking, but since these areas are covered in series by the clear layer, peeling or cracking occurs. Can hardly occur.

  Preferably, at least a part of the components of the outer case for a hot water unit according to the present invention is a pressed product, and the inkjet printing layer has a mark for positioning when the components are pressed. Is provided.

  According to such a configuration, when the component parts of the outer case are formed by press working, press working can be performed with reference to the positioning mark represented by the inkjet printing layer. Therefore, it is possible to accurately align the characters, patterns, and the like represented by the ink-jet printing layer with the portions to be processed by the press working, so that these are not largely displaced.

  Preferably, the inkjet printing layer contains an ultraviolet curable resin.

  According to such a configuration, it is possible to cure the ink-jet printing layer at an early stage by irradiating ultraviolet rays. For this reason, for example, at the time of inkjet printing, it is possible to irradiate the inkjet printing layer with ultraviolet rays and proceed with inkjet printing while curing the inkjet printing layer. If a new ink jet printing layer having a different color or the like is provided in a region adjacent to the uncured ink jet printing layer, bleeding may occur.However, as described above, ink jet printing is performed while curing the ink jet printing layer by ultraviolet irradiation. By proceeding, it is possible to prevent the above-mentioned bleeding from occurring.

  Preferably, the inkjet printing layer contains a thermosetting resin.

  According to such a configuration, after the inkjet printing is completed, the inkjet printing layer is heated and the thermosetting resin is cured, thereby increasing the strength of the inkjet printing layer and providing excellent weather resistance and the like. Is possible.

  The hot water unit provided by the second aspect of the present invention is characterized by including an outer case for the hot water unit provided by the first aspect of the present invention.

  According to such a configuration, the same effect as that described for the outer case for the hot water unit provided by the first aspect of the present invention can be obtained.

Other features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

(A) is a side view which shows an example of the hot water unit which concerns on this invention, (b) is an exploded perspective view of the exterior case (state in which the internal hot water equipment is omitted) of the hot water unit shown in (a). It is. (A) is a side view in a state where a clear layer is omitted in FIG. 1 (a), and (b) is an exploded perspective view in a state where the clear layer is omitted in FIG. 1 (b). (A) is a front view of a state where a clear layer of a cover body of an exterior case shown in FIG. 1 is omitted, and (b) is a front view of a state where an ink jet printing layer of the cover body is omitted. 3A is a cross-sectional view taken along a line IVa-IVa in FIG. 3A, FIG. 3B is a cross-sectional view of a main portion taken along a line IVb-IVb in FIG. 3A, and FIG. 4D is a cross-sectional view of a main part of IVc-IVc, and FIG. 3D is a front cross-sectional view of a part indicated by reference numeral IVd in FIG. FIG. 4 is a rear view of the cover body shown in FIGS. 1, 2, and 3 (a). (A)-(g) is explanatory drawing which shows an example of the manufacturing process of the cover body shown in FIG.1, FIG.2 and FIG.3 (a). FIG. 4 is a sectional view of a main part showing an example of a color steel plate used for manufacturing the cover body shown in FIGS. 1, 2 and 3 (a). (A) is a perspective view showing an example of a schematic configuration of a printer used for inkjet printing, and (b) is a view of an arrow VIIIb in (a), and a print head of the printer shown in (a). It is a figure which shows the schematic structure of. FIG. 5 is an essential part cross-sectional view showing one example of a working step for obtaining the structure in FIG.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  The hot water unit U shown in FIGS. 1 and 2 is a hot water supply device, and has a configuration in which a hot water device 1 for generating hot water is housed in an outer case C. The hot water device 1 includes a heat exchanger 10 through which hot and cold water flows, a burner 11 for heating hot and cold water in the heat exchanger 10, and a fan 12 for supplying combustion air to the burner 11.

  The exterior case C includes a rectangular box-shaped exterior case main body 2 having an opening 20 on the front surface, and a cover 3 (front cover) closing the opening 20. The cover body 3 is detachably attached to the front surface of the outer case body 2 by using a screw body 9 such as a screw and screw insertion holes 31 and 21 through which the screw body 9 is inserted.

  In the present embodiment, the cover body 3 is provided with the ink-jet printing layer 4 (a portion provided with a dot pattern or a wavy pattern in the figure) and the clear layer 5. It is not provided on the outer case body 2. Therefore, hereinafter, the configuration of the cover body 3 will be described in detail, and description of the outer case body 2 will be omitted. However, as will be described later, it goes without saying that the outer case body 2 may be provided with an ink jet printing layer or a clear layer.

  The cover body 3 includes a press-formed color steel plate 30 (corresponding to an example of a metal plate provided with a paint layer) to be described later, an inkjet printing layer 4 (4a to 4g) (see also FIGS. 3 and 5), And a clear layer 5 are provided. However, at the time of manufacturing the cover body 3 in the present embodiment, as described later, the press working is performed after the inkjet printing layer 4 is provided on the color steel plate 30, and the clear layer 5 is provided after the press working. .

The cover body 3 has a substantially rectangular panel shape when viewed from the front, and is surrounded by an outer peripheral flange portion 32 and the outer peripheral flange portion 32, and is located forward (toward the outer case C) of the outer peripheral flange portion 32. And a swelling portion 33 that swells. The outer peripheral flange portion 32 is a portion to be brought into contact with the substantially rectangular frame-shaped flange portion 22 provided on the front surface portion of the outer case main body 2, and as shown in FIG. Is provided with a folded portion 32a formed by hemming.

  The bulge 33 of the cover 3 occupies most of the cover 3, and the bulge 33 is provided with an air supply port 34 and an exhaust port 35 (see also FIG. 3). The air supply port 34 is a part that allows outside air to flow into the exterior case C. The exhaust port 35 is a part for discharging the exhaust gas after the heat recovery by the heat exchanger 10 to the outside of the outer case C, and as shown in FIG. 35a is formed as a continuous burring hole. As with the exhaust port 35, the air supply port 34 can also be a burring hole.

  The inkjet printing layer 4 is a coating layer provided by using an inkjet printer 8 as described later. As the ink for inkjet printing, a water-based pigment ink or a solvent-based pigment ink can be used. In the present embodiment, an ink containing an ultraviolet curable resin and / or a thermosetting resin is used. .

  As the inkjet printing layer 4, provided on the surface of the cover body 3, for example, inkjet printing layers 4 a to 4 d representing a predetermined pattern D1 such as a penguin, and characters such as a maker, a model, or a trademark of the hot water unit U. An inkjet print layer 4e representing D2 (in the drawing, "AABBCC" as an example) is provided. In addition, at four corners of the cover body 3, ink jet printing layers 4f representing positioning marks D3 at the time of press working described later are provided. The positioning mark D3 is shown in a + shape in the drawing, but is not limited to this. Further, the positioning mark D3 may be provided on the back surface of the cover body 3 instead of or in addition to the front surface of the cover body 3.

  As shown in FIG. 5, on the back surface of the cover body 3, an ink-jet printing layer 4g representing the electric wiring diagram D4 of the hot water device 1 is further provided. Instead of or in addition to the electric wiring diagram D4, it is also possible to adopt a configuration showing a piping diagram of the hot water equipment 1. Although illustration is omitted, the back surface of the cover body 3 may be provided with an ink jet print layer for indicating specifications of the hot water unit U, precautionary notes, etc., separately from the electrical wiring diagram D4 and the piping diagram. It is possible.

  As shown in FIG. 7, the color steel plate 30 as a raw material of the cover body 3 includes a plated steel plate 30a, a white (including white) front side paint layer 30b laminated on the surface of the plated steel plate 30a, and a plated steel plate. This is a multi-layer structure having a backside paint layer 30c as a service coat laminated on the backside of 30a. The ink jet printing layers 4a to 4e have a different color from the white front side paint layer 30b, and represent the pattern D1 such as the penguin appearance and the characters D2. The white part in FIG. 3A is a part of the front side paint layer 30 b of the color steel plate 30 on which the inkjet printing is not performed.

Basically, the entire area of the inkjet printing layer 4a is formed with the same color and the same thickness. However, as shown in FIG. 4 (d), the thickness ta of the corner 33 a ′ of the peripheral wall 33 a of the bulging portion 33 (the wall rising forward from the outer peripheral flange 33) is different from that of the other portions of the peripheral wall 33 a. And the thickness of the portion other than the peripheral wall portion 33a. The bulging portion 33 is formed by drawing, and the peripheral wall portion 33a corresponds to an example of the drawing portion in the present invention. In this drawing, the extension amount at the corner 33a 'of the peripheral wall portion 33a is reduced. The corner 33a 'corresponds to an example of the "portion of the drawn portion having a smaller thickness than other portions" in the present invention. Corresponding to this, if the thickness ta of the inkjet printing layer 4a at the corner 33a 'is reduced, an effect of preventing separation of the inkjet printing layer 4a can be obtained as described later. In the case where the entire squeeze amount (extension amount) of the peripheral wall portion 33a is increased in order to increase the swell amount of the swelling portion 33, the thickness tb of the portion of the peripheral wall portion 33 other than the corners 33a 'is set to: The thickness of the other part of the inkjet printing layer 4a may be thinner.

  The inkjet printing layer 4b is provided around the exhaust port 35, but as described with reference to FIG. 4C, the exhaust port 35 is formed as a burring hole having a burring portion 35a. . On the other hand, a part of the inkjet printing layer 4b is also provided on the inner surface of the burring portion 35a. This makes it possible to make the peripheral portion of the exhaust port 35 and the inner surface of the burring portion 35a have the same color, so that the exhaust port 35 and its peripheral portion can be made well-formed.

  The inkjet printing layer 4e is provided on the front surface of the stepped portion 36 (see also FIG. 3B and FIG. 4B) which three-dimensionally represents the character D2. More specifically, the stepped portion 36 is a portion in which the character D2 is three-dimensionally formed by partially extruding the color steel plate 30 by pressing, and the inkjet printing layer 4e is It is provided on the front surface of such a stepped portion 36. The stepped portion 36 has a front side convex shape in which a part of the color steel plate 30 is pushed out to the front side of the cover body 3 and a front surface in which a part of the color steel plate 30 is pushed out to the rear side of the cover body 3. There is a side concave form, but any form may be used.

The clear layer 5 is formed over substantially the entire front surface of the cover body 3 so as to cover the inkjet printing layer 4. As shown in FIG. 4B, the clear layer 5 is also formed in a concave portion in a region where the character D2 is formed. Further, as shown in FIG. 4C, the clear layer 5 is also provided on the inner surface of the burring portion 35a, and is provided around the ink jet printing layer 4 and the exhaust port 35 (burring hole) on the inner surface of the burring portion 35a. The inkjet printing layer 4 and the like are covered in a series. The clear layer 5 is not provided on the back surface of the cover body 3 because the back surface is not directly exposed to the weather and the sun rays. However, a configuration in which the clear layer 5 is also provided on the back surface of the cover body 3 to protect the ink jet printing layer 4g can be adopted. In this case, instead of providing the clear layer 5 on the entire back surface, a configuration in which the clear layer 5 is provided only in a region where the inkjet printing layer 4g is provided may be adopted.
The clear layer 5 is made of a resin paint containing no pigment, but contains an ultraviolet absorber. The clear layer 5 is made of a thermosetting resin or an ultraviolet curable resin.

  The above-mentioned cover body 3 can be manufactured through the following steps.

  First, as shown in FIG. 6A, as a raw material of the cover body 3, the flat plate-shaped color steel plate 30 described with reference to FIG. 7 is prepared. Next, the inkjet printing layer 4 is provided by performing inkjet printing on the color steel plate 30 (strictly, on the paint layers 30b and 30c of the color steel plate 30) as shown in FIG. The ink-jet printing is performed using, for example, an ink-jet printer 8 as shown in FIG. The ink jet printer 8 is configured such that a print head 80 can be freely moved in x and y directions orthogonal to each other above a mounting table 81 on which the color steel plate 30 is mounted and supported. As shown in FIG. 8 (b), the print head 80 includes a plurality of inkjet nozzles 82 for atomizing an inkjet paint of a predetermined color and spraying the droplets toward the color steel plate 30. However, in the present embodiment, a pair of ultraviolet light sources 83 (83a, 83b) are further provided.

For example, when inkjet printing is performed while moving the print head 80 in the x1 direction of the figure as the main scanning direction, the ultraviolet light source 83a on the rear side in the main scanning direction is caused to emit light, and the area immediately after inkjet printing is performed. Irradiate ultraviolet rays. Since the inkjet printing layer 4 contains an ultraviolet curable resin, the inkjet printing layer 4 can be rapidly cured (cured to a degree that does not cause bleeding described later) by the above-described irradiation of ultraviolet rays. Therefore, it is possible to prevent a problem that the uncured inkjet printing layers 4 having different colors are mixed with each other to cause bleeding. When the inkjet printing is performed in the direction opposite to the x1 direction, the same operation as described above can be obtained by causing the ultraviolet light source 83b to emit light instead of the ultraviolet light source 83a.

  In the case where the ink jet printing layer 4a is provided, the thickness ta of the other part of the color steel plate 30 is set to the corner 33a 'of the peripheral wall 33a shown in FIG. Thinner than

  After finishing the above-mentioned inkjet printing on both the front and back surfaces of the color steel plate 30, as shown in FIG. 6 (c), the color steel plate 30 is heated to dry the inkjet printing layer 4, The contained thermosetting resin is cured. This heating is performed using, for example, a heating furnace. By such a process, the strength of the inkjet printing layer 4 can be increased, and durability can be given to the subsequent press working.

  Next, the above-mentioned color steel plate 30 is subjected to a drawing process as a press process to form an outer peripheral flange portion 32 and a bulging portion 33 as shown in FIG. Thereafter, as shown in FIG. 6 (e), as shown in FIG. And hemming. Thereby, the above-mentioned cover body 3 can be manufactured. In the above-described working process, the positioning of the color steel plate 30 can be accurately performed based on the positioning mark D3. The formation of the exhaust port 35 is performed by using a punch 7a and a die 7b as shown in FIG. 9, for example. Since the inkjet printing layer 4b is also provided in a series at the locations, as shown in FIG. 4C, the configuration in which the inkjet printing layer 4b is provided in a series from the periphery of the exhaust port 35 to the burring portion 35a is provided. Can be properly realized.

  After finishing the outer shape of the cover body 3 as described above, as shown in FIG. 6 (f), the cover body 3 is subjected to clear painting, and the clear layer 5 is formed on substantially the entire front surface of the cover body 3. . The clear paint is mainly composed of a thermosetting resin (or an ultraviolet curable resin) containing an ultraviolet absorbent. The clear coating is, for example, spray coating in which clear paint is sprayed from a spray nozzle 88. After the completion of the clear coating, the clear layer 5 is heated, dried and cured as shown in FIG. The heating is, for example, heating using a heating lamp. Unlike the above, when the clear layer 5 is made of an ultraviolet curable resin, it is cured by irradiation with ultraviolet light.

  Next, the operation of the outer case C having the cover 3 and the hot water unit U will be described.

  First, since a design D1 such as a penguin is shown on the front surface of the cover body 3, the hot water unit U is designed to have a better design compared to a case where the surface of the cover body 3 has a single color and no pattern. It can be excellent. Since the inner surface of the burring portion 35a of the exhaust port 35 is continuously coated around the exhaust port 35, the inside of the burring portion 35a has a different color from the peripheral portion of the burring portion 35a. The appearance is better in comparison. In the corner 33a 'of the peripheral wall 33a, a part of the color steel plate 30 is greatly extended by drawing, and the thickness ta of the inkjet printing layer 4 in this part is thinner than the thickness tb of the other part. Therefore, it is possible to prevent the possibility that the inkjet printing layer 4 is easily peeled off by the drawing process.

  Since the electrical wiring diagram D4 or the piping diagram is represented by the inkjet printing layer 4g on the back surface of the cover 3, it is convenient for maintenance work and the like. For example, in a unit in which a sheet on which an electrical wiring diagram is printed is attached to the back surface of the cover body 3, the sheet may be damaged, or the sheet may be separated from the cover body 3 and lost. If so, there is no such fear.

  Since the coating layers representing the pattern D1, the character D2, the positioning mark D3, the electrical wiring diagram D4, and the like of the cover body 3 are all the inkjet printing layers 4, the inkjet printer 8 as described above is used. And can be easily provided. For example, unlike painting by the spray method, no masking treatment or color matching of paint is required, and no skill is required. Therefore, workability and productivity can be improved. Further, the design of the design D1 and the like can be easily changed, and is suitable for small-quantity multi-product production. Furthermore, according to the inkjet printing, there is no or little waste of the ink paint, and it is economical. Since the base of the ink jet printing layer 4 is the paint layers 30b and 30c of the color steel sheet 3, it is possible to improve the appearance and weather resistance of the portion where the ink jet printing layer 4 is not provided.

  The clear layer 5 enables various expressions such as glossy and unglazed, and further improves the design of the outer case C. Further, since the clear layer 5 covers and protects the ink jet printing layer 4 on the front surface of the cover body 3, the weather resistance of the ink jet printing layer 4 is increased and the ink jet printing layer 4 is excellent in stain resistance. In particular, since the clear layer 5 contains an ultraviolet absorber, the color of the inkjet printing layer 4 does not fade due to ultraviolet rays of sunlight. Further, the clear layer 5 also has an effect of suppressing the occurrence of peeling, cracking, and the like in the inkjet printing layer 4, but the clear layer 5 is provided over substantially the entire front surface of the cover body 3, so that the above effect is not obtained. It will be better.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of the outer case for the hot water unit according to the present invention and the specific configuration of each part of the hot water unit can be variously modified within the range intended by the present invention.

  In the above-described embodiment, an example in which only the cover body 3 is subjected to inkjet printing or clear coating is shown. However, in the present invention, instead of or in addition to this, the outer case body 2 is also subjected to inkjet printing or clear coating. Of course. A clear coating may be applied to the outer case body without performing inkjet printing. The specific contents such as characters and patterns represented by the ink jet printing layer of the present invention are not limited, and it is sufficient that at least one of characters, symbols, figures, and patterns is represented. The clear layer may be colored and transparent instead of colorless and transparent.

The hot water unit according to the present invention is a hot water storage tank in which a hot water storage device, such as a hot water supply device, is stored in an outer case, instead of a hot water generation device that stores hot water generation devices in an outer case. It may be configured as a unit or the like. Therefore, the exterior case is not limited to a combination of an exterior case body having an open front and a cover closing the front opening.
As a material of the outer case, a flat metal plate is used. As the metal plate, a material different from a commercially available color steel plate can be used.

U Hot water unit C Exterior case D1 Design D2 Character D3 Positioning mark D4 Electric wiring diagram 1 Hot water equipment 2 Exterior case body 20 Opening (of exterior case body)
3 Cover body 30 Color steel plates 30b, 30c Paint layer 33a Peripheral wall (drawing portion)
33a 'Corner of peripheral wall (drawn part)
35 Exhaust port (burring hole)
35a Burring portion 4 (4a to 4g) Ink jet printing layer 5 Clear layer

Claims (7)

An outer case for a hot water unit used to house therein a hot water device for hot water generation or hot water storage,
The outer case is configured using a metal plate, and at least one of an outer surface and an inner surface of the metal plate is provided with a paint layer,
An ink-jet printing layer provided by being laminated on the paint layer and representing at least one of characters, symbols, figures, and patterns,
A clear layer covering the inkjet printing layer,
An outer case for a hot water unit, comprising: An exterior case for the hot water unit according to claim 1,
An outer case for a hot water unit, wherein the clear layer contains an ultraviolet absorber. An outer case for a hot water unit according to claim 1 or 2,
The outer case includes an outer case body having at least one surface formed as an opening, and a cover attached to the outer case body so as to cover the opening,
An exterior case for a hot water unit, wherein the inkjet print layer and the clear layer are provided on at least one of the exterior case body and the cover body. An exterior case for a hot water unit according to any one of claims 1 to 3,
This outer case has a drawing part,
An outer case for a hot water unit, in which a portion of the drawn portion in which the thickness of the metal plate is thinner than other portions has a smaller thickness of the ink jet printing layer than the other portions. . An exterior case for a hot water unit according to any one of claims 1 to 4,
It has a burring hole with a burring part protruding on the periphery,
The burring portion is provided with an inkjet printing layer connected to an inkjet printing layer provided in the periphery of the burring hole, and these inkjet printing layers are covered in series by the clear layer, for a hot water unit. Exterior case. An outer case for the hot water unit according to any one of claims 1 to 5,
At least some of the components of the outer case are stamped products,
An outer case for a hot water unit, wherein a mark for positioning when the component is pressed is provided as the inkjet printing layer.   A hot water unit comprising an outer case for a hot water unit according to any one of claims 1 to 6.

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