JP2008534908A - Refrigeration unit and / or refrigeration unit - Google Patents

Abstract

The present invention relates to a cooling unit and / or a refrigeration unit provided with a cooling tank and an evaporator accommodated in an evaporator accommodating space in the cooling tank. According to the present invention, in the cooling device unit and / or the refrigeration device unit, the evaporator has a multi-sided coating made of a soft padding material that is elastic and / or deformable.

Description

  The present invention relates to a cooling device unit and / or a refrigeration device unit including a cooling tank and an evaporator, and preferably, a cooling device unit including a stacked evaporator housed in an evaporator housing space in the cooling tank and / or Or it relates to a refrigeration unit.

  In such a cooling device unit and / or refrigeration device unit having an evaporator embedded in an internal tank, the evaporator fits relatively accurately in an evaporator storage space provided for storing the evaporator. It is attached to do. The clicking noise during the operation of the unit means a problem that occurs in the following state. Such a clicking noise is generated when the wall portion of the evaporator housing space is repeatedly iced by the evaporator and removed by a regular defrosting process. Since a lot of moisture remains after the defrosting process, when cooling is performed after defrosting, the remaining water droplets freeze between the surface of the evaporator and the internal tank. When this is alleviated suddenly and suddenly leaves the freezing point, this undesirable clicking noise occurs.

  In order to eliminate or substantially reduce the clicking noise resulting from such freezing and slow ice, sufficient space is provided between the evaporator module and the rear wall of the unit, thereby ensuring complete freezing. It has already been proposed to avoid it. However, if the space is defined in this way, a loss of internal use space occurs.

  Accordingly, it is an object of the present invention to provide an improved refrigeration unit and / or refrigeration unit that avoids the disadvantages of the prior art and develops more effectively. Specifically, the clicking noise of the evaporator is eliminated and at least substantially reduced without wasting valuable internal use space.

  This object is achieved by the invention with the cooling device unit and / or the refrigeration device unit according to claim 1. Preferred embodiments of the invention are the subject of the dependent claims.

  In order to avoid the clicking noise described above, it is first proposed to separate the evaporator from the internal tank of the cooling unit and / or the refrigeration unit with respect to the evaporator. According to the present invention, the evaporator has a multi-sided coating made of a soft and / or deformable soft padding material. This coating can prevent the evaporator module and the periphery of the evaporator, specifically the inner wall of the cooling tank, from being directly frozen together. On the one hand, the evaporator module and the evaporator surroundings and on the other hand the filling material and the inner wall of the unit are certainly cooled together. However, the relative motion caused by thermal strain is balanced by the deformable padding material and the click noise caused by the connection being suddenly cut off is lost. Strain and noise no longer occur due to the relative movement occurring in the filling material. In addition, the structural space inside the unit can be maximized. The waste of space is eliminated by the covering of the stuffing material replacing the large, predefined air gap described above. Further, since the airtight state can be gradually created by this coating, the outside air that causes the loss of energy efficiency cannot pass through the evaporator. Specifically, since the stuffing material can have a heat insulating function, it can function as a heat insulating material and brings about a good effect on energy consumption.

  In a further development of the invention, such a coating is specifically provided in the evaporator housing space, at least on the contact surface of the evaporator where the evaporator contacts the wall of the cooling space. ing. Therefore, this coating is provided on the portion where the evaporator may freeze.

  For certain applications, the coating may be provided on a part of the contact surface, for example in the form of a strip. However, it is preferable that the coating made of an insulating material covers the entire contact surface of the evaporator. The clicking noise can be largely eliminated completely by covering the entire contact surface of the evaporator with a coating made of padding material. Care should be taken that there are no open adjacent ends left and the frame area and ends of the evaporator housing are largely completely covered by the insulating material.

  Depending on the evaporator design, the other surface of the evaporator can be the contact surface. According to a preferred embodiment of the invention, the coating substantially completely covers the two wide and flat surfaces of the evaporator.

  The coating is typically formed from a plurality of different materials. According to an advantageous embodiment of the invention, the coating consists of a cellular foam, in particular a closed polyethylene cellular foam. The coating is effective if it is elastic and deformable at least to some extent so that the aforementioned compensation variation is obtained.

  According to a particularly advantageous embodiment of the invention, the coating is at least partly hydrophobic, i.e. water-repellent, specifically formed so that at least the surface of the coating is hydrophobic. Yes. The coating is effective if it does not absorb any water during the operation of the unit. This can be achieved, for example, by a coating made of closed cell foam.

  The coating can generally be formed in one piece. In other words, the evaporator can be covered with cellular foam at its contact surface. However, the coatings are arranged so that they fit snugly on the contact surface or contact area of the evaporator and are flush with each other at their adjacent ends so that no open adjacent ends of the evaporator remain. It is preferable to have a cellular foam piece.

  It is sufficient for the covering made of the filling material to have a slight thickness in the range of a few millimeters. According to one embodiment of the present invention, the coating thickness may be different on different sides of the evaporator. Specifically, the coating may be such that the thickness of the surface of the evaporator facing the refrigeration space is greater than the thickness of the evaporator surface away from the cooling space and / or the flat surface of the evaporator. Good. Heat transfer to the refrigeration space is suppressed or minimized during the defrosting operation. For example, the coating may have a thickness of 3 to 5 mm on the surface facing the internal space of the cooling device unit, and may have a thickness of 1 to 3 mm on the other surface of the evaporator. However, according to another embodiment of the present invention, it can be seen that a coating having the same and sufficient thickness on all sides of the evaporator is used.

  In a further developed form of the invention, the coating is preferably connected area-wise to the surface of the evaporator, preferably by transmitting force and / or tightly bonding, in particular by adhesive bonding. Preferably fixed. Specifically, the coating made of cellular foam may be adhesively bonded to the sheet metal coating of the evaporator.

  The evaporator is already well secured by inserting it so that it fits exactly in the evaporator storage space prepared for it. The evaporator receiving space is adapted for this purpose to the outer shell of the evaporator for its shape. An evaporator may be prepared for insertion into the evaporator receiving space with a light pressure fit, supplemented by a slightly elastic deformation of the coating. In this context, the slightly compressed, coated foam foam holds the evaporator without shaking and protects it from impacts in the evaporator housing space.

  Furthermore, the fixing means can generally be dispensed with. However, according to one embodiment of the present invention, the evaporator can be secured to the internal tank using force transmission means to prevent the evaporator from slipping during installation. It has been found effective if the evaporator is secured to the inner container by a plurality of screws at different locations in the inner tank, rather than a plastic plug or plastic plug. Thereby, the clicking noise can be further reduced.

  The evaporator storage space can generally have various structures. According to one embodiment of the invention, the inner wall of the tank can be provided with a substantially tab-shaped recess that can be closed by an inner cover. The evaporator can be inserted from the internal space of the cooling tank into the evaporation unit accommodating space in the internal tank. When the inner cover is placed on the tab-shaped recess and the tab-shaped recess is closed, the coating applied with the evaporator or the filling material comes into contact with the tab bottom, the tab frame, and the inner cover. It is effective that the inner cover does not have a web projecting at least in the region of the evaporator in the evaporator housing space and is fixed so as to lie flat on the frame of the tab-type recess. Sealing beads, which are stuffing materials, specifically, foam foam beads, are sealed with the inner cover frame and / or tab-shaped recesses so as not to cause a clicking noise between the inner cover and the inner wall of the inner cover. May be used for

  The invention is described in more detail below with reference to preferred embodiments and drawings.

  The cooling device 1 shown in each drawing includes a substantially cubic cooling tank 2 that can be closed by a door 3. An internal space 4 of the cooling tank 2 shown in FIG. 2 is partitioned by a wall of the internal tank 5. The tab-shaped recess 6 is formed on the rear side of the internal tank 5 facing the door 3, and defines an evaporator accommodation space 7 in which the evaporator 8 is accommodated. In addition to the evaporator 8 in the illustrated embodiment, a fan 9 is accommodated in the tab-shaped recess 6, and this is disposed on the upper frame of the recess 6.

  The tab-shaped recess 6 has a substantially rectangular shape, and its lower end has a structure that is lightly inclined toward the center (see FIG. 2).

  As shown in FIG. 4, the tab-shaped recess 6 can be closed with an inner cover 20 that has an outer shape adapted to the outer contour of the recess 6 and is fixed to the outer peripheral frame 11 of the recess 6. The inner cover 20 is positioned on the frame 11 in a sealed state as much as possible by, for example, applying foam beads to the left and right side frames 11 of the recess 6. However, the inner cover is not disposed on the frame 11 of the recess 6 in a sealed state so that air is sucked at the lower end of the inner cover. The fan 9 shown in FIG. 2 is arranged between the lower part of the frame 11 of the recess 6 and the inner cover 20 so that the air flows upward on the evaporator 8 and again flows out from the fan hole provided at the upper end of the inner cover 20. Air is sucked in the gap.

  As shown in FIG. 2, the evaporator 8 is arrange | positioned in the tab-shaped recessed part 6 in the state fitted closely. Two vertical flat side surfaces and one flat bottom surface of the evaporator 8 are arranged in close contact with each other on the side wall of the tab type recess 6. The evaporator housing space 7 is formed so as to be larger than the evaporator as it goes upward, so that an empty space that can accommodate the air injected into the evaporator and the discharged air together with other cables remains.

  Further, the thickness of the evaporator 8 substantially matches the depth of the tab-type recess 6. This depth must be measured with reference to a direction perpendicular to the plane of FIG. When the inner cover is installed so as to cover and close the tab-shaped recess 6 of the inner tab 5, the evaporator 8 is in contact with the bottom of the recess 6 on the one hand and the inner cover on the other hand. The evaporator 8 itself is housed in a tight fit in the evaporator housing space 7 and is sufficiently fixed by itself, but the evaporator is screwed onto the bottom of the tab-shaped recess 6 by a screw connection. Preferably it can be attached. Specifically, for example, the evaporator is prevented from sliding upward into an empty space for housing the tube and the cable at the time of attachment.

  As shown in FIG. 3, the evaporator 8 is covered with a coating 12 made of a hydrophobic closed-cell foam. The covering 12 covers the contact surface of the evaporator housing 8 in all cases. The evaporator 8 is in contact with the wall portion of the tab-shaped recess 6 and the inner cover at the contact surface. The evaporator 8 itself has a sheet metal coating made of aluminum that forms the contact surface, that is, the housing of the evaporator 8. A coating 12 made of a cellular foam is adhesively bonded to the aluminum metal coating in terms of area so that the evaporator 8 is covered with all of the contact surfaces.

  When the evaporator 8 has the above-described coating 12 made of a soft and flexible filling material, when the cooling is repeatedly performed after the defrosting process, the frozen state shown in FIG. 5 is obtained. Certainly, the surface of the evaporator 8 is frozen on the one hand with the coating 12 and on the other hand with the coating 12 having a surface around the unit, specifically with the internal unit wall of the recess 6. FIG. 5 shows respective ice films between the coating 12 and the evaporator 8 and between the coating 12 and the recess 6. If relative heat transfer occurs between the evaporator 8 and the inner wall of the unit, it will escape from the frozen ice droplets even without the coating 12. However, the covering 12 can compensate for these relative movements and thus avoid the associated clicking noise.

  On the other hand, FIG. 6 shows a case where icing occurs directly on the inner surface of the recess 6 on the evaporator 8 without the coating, as in the conventional technique without the coating 12 of the present invention. If relative movement occurs here, the relative movement is not compensated, and an undesirable clicking noise occurs.

FIG. 1 is a schematic view showing an entire cooling device unit according to a preferred embodiment of the present invention. FIG. 2 is a schematic view showing the inside of the cooling tank of the cooling device unit shown in FIG. 1, with the door open, the evaporator storage space located on the rear wall of the cooling tank and the evaporation stored in the space. Shows the vessel. FIG. 3 is a schematic view showing the evaporator of the cooling device unit shown in the above-mentioned figure, and shows a coating made of an insulating material provided on a sheet-like metal coating of the evaporator. FIG. 4 is a schematic view showing an inner tank cover for closing the evaporator accommodating space in the rear wall of the cooling tank. FIG. 5 is a schematic diagram showing freezing in a state employed in an evaporator with a coating and the surrounding surface. FIG. 6 is a schematic diagram showing freezing in a state employed in an evaporator without a coating and the surrounding surface.

Claims (15)

A cooling unit and / or a refrigeration unit comprising a cooling tank (2) and an evaporator (8) housed in an evaporator housing space (7) in the cooling tank (2),
The evaporator (8) is a refrigeration unit and / or a refrigeration unit having a multi-sided coating (12) made of a soft and / or deformable soft padding material. The cooling device unit and / or the refrigeration device unit according to claim 1,
The said coating | cover (12) is a cooling device unit and / or freezing device unit which are provided on all the surfaces of the evaporator (8) which contacts the wall of the said evaporator accommodation space (7) at least. The cooling device unit and / or the refrigeration device unit according to claim 2,
A refrigeration unit and / or a refrigeration unit in which the contact surface (13, 14, 15, 16, 17) of the evaporator (8) is completely covered with the coating (12). In the cooling device unit and / or the refrigeration device unit according to any one of claims 1 to 3,
The coating (12) substantially completely covers two wide surfaces (16, 17) and / or a plurality of flat or cut surfaces (13, 14, 15) of the evaporator (8). Covering refrigeration unit and / or refrigeration unit. In the cooling device unit and / or the refrigeration device unit according to any one of claims 1 to 4,
The coating (12) is a cooling unit and / or a refrigeration unit made of a cellular foam, specifically, an independent polyethylene cellular foam. In the cooling device unit and / or the refrigeration device unit according to any one of claims 1 to 5,
The coating (12) is at least partially formed to be hydrophobic, specifically, a cooling unit and / or a refrigeration unit having a hydrophobic surface. In the cooling device unit and / or the refrigeration unit according to any one of claims 1 to 6,
The said coating | cover (12) is a cooling device unit and / or freezing device unit currently formed so that it may not absorb water permanently. In the cooling device unit and / or the refrigeration unit according to any one of claims 1 to 7,
The coating (12) is divided into a plurality of pieces, and is preferably a cooling unit and / or a refrigeration unit comprising a plurality of plates each covering the surface of the evaporator. In the cooling device unit and / or the refrigeration unit according to any one of claims 1 to 8,
The coating (12) is preferably cooled in an area connected to the surface of the evaporator, respectively, by transmitting forces and / or tightly bonding, in particular by adhesive bonding. Equipment unit and / or refrigeration equipment unit. In the cooling device unit and / or the refrigeration device unit according to any one of claims 1 to 9,
The covering (12) is preferably area-wise on each unit surface surrounding the evaporator (8) by transmitting force and / or tightly bonding, in particular by adhesive bonding. Connected refrigeration unit and / or refrigeration unit. In the cooling device unit and / or the refrigeration unit according to any one of claims 1 to 10,
The evaporator (8) is preferably housed so as to fit tightly into the evaporator housing space (7), preferably with a slight pressure fit that slightly compresses the coating (12); / Or refrigeration unit. In the cooling device unit and / or the refrigeration unit according to any one of claims 1 to 11,
The evaporator housing space (7) is a cooling unit and / or a refrigeration unit having a tab-shaped recess (6) on the inner wall of the cooling tank (2) that can be closed by an internal cover. In the cooling device unit and / or the refrigeration unit according to any one of claims 1 to 12,
The inner cover is formed so as not to have a web protruding into the evaporator accommodating space at least in the region of the evaporator (8), and preferably the frame (11) of the tab-shaped recess (6). A refrigeration unit and / or a refrigeration unit arranged flat on top. In the cooling device unit and / or the refrigeration device unit according to any one of claims 1 to 13,
The evaporator (8) is a cooling unit and / or a refrigeration unit fixed to the inner wall of the cooling tank (2) by screw connection. In the cooling device unit and / or the refrigeration unit according to any one of claims 1 to 14,
The evaporator (8) is formed as a stacked evaporator and / or a cooling unit and / or a refrigeration unit having a sheet-like metal coating to which the coating (12) made of an insulating material is applied. .

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