JP2017172843A - External facing structure of heat pump unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an external facing structure of a heat pump unit capable of preventing a step portion of a side plate portion from being damaged by a corner peripheral edge portion of a top plate portion with a simple structure.SOLUTION: In an external facing structure (2) of a heat pump unit (1) configured into the box shape by a tray-shaped bottom plate portion (10) opened to an upper part, a tray-shaped top plate portion (11) opened to a lower part, and a side plate portion (12) connecting the bottom plate portion (10) and the to plate portion (11), a fixing portion (15) for fixing an upper end portion of the side plate portion (12) and a peripheral edge portion (11b) of the top plate portion (11) is provided with an upper end displacement plate portion (12e) formed by displacing the upper end portion of the side plate portion (12) inward through a step (16), the peripheral edge portion (11b) of the top plate portion (11) is formed to cover the upper end displacement plate portion (12e) from an outer side, and a cutout portion (19) is formed on a lower end portion of the corner peripheral edge portion (11br) of the top plate portion (11).SELECTED DRAWING: Figure 1

Description

  The present invention relates to an exterior structure of a heat pump unit, and more particularly to a structure configured so as not to damage an outer surface of a side plate portion at a lower end portion of a peripheral portion of a top plate portion.

As the exterior structure of the heat pump unit, a tray-like bottom plate portion opened upward, a tray-like top plate portion opened downward, and a side plate portion connecting the bottom plate portion and the top plate portion are formed in a box shape. May be adopted. The bottom plate portion, the top plate portion, and the side plate portion are made of painted steel plate.
The upper end portion of the side plate portion is formed with an upper end displacement plate portion that is displaced inward by a step portion to the same extent as the thickness of the peripheral portion of the top plate portion. It is engaged with the part in an outer fitting manner and fixed with a plurality of screws.

  In many cases, the heat pump unit is packed in a structure in which a lower packing material for packing the lower portion of the heat pump unit and an upper packing material for packing the upper portion of the heat pump unit are tied together by two packing tapes. In this case, when the heat pump unit is transported in a state where the packed heat pump units are stacked in two or three stages up and down, the weight (load) of the heat pump unit stacked on the upper side is added to the exterior structure of the heat pump unit. Will work.

  The exterior case of the air conditioner of patent document 1 has a front plate, a back plate, and a top plate, a step portion and a plurality of convex portions are formed at the upper end portion of the back plate, and the lower end of the peripheral wall portion of the top plate portion. The part is formed with a curling part that is bent inward in a U shape, and the vicinity of the end face of the four corner R parts of the curling part is formed in a saw blade shape. The curling portion of the peripheral wall portion of the top plate portion is engaged with the upper end portion of the back plate to be engaged with the plurality of convex portions, and the holding force is exhibited by the elastic force of the saw blade portion.

Japanese Patent No. 2950063

  When transporting the packaged heat pump units in a state where they are stacked in two or three stages, a load is applied to the top plate part, and the top plate part is elastically deformed downward, so that the lower end of the peripheral part of the top plate part The part touches the stepped part at the upper end part of the side plate part, and the vibration acts in that state, so the coated film on the stepped part (coated steel sheet coated film) is damaged, and then the coated film is used during use of the heat pump unit. There was a problem that rust was generated from the damaged part.

  Here, in the linear portion where the step portion extends linearly, when a load is applied to the step portion from the lower end portion of the peripheral portion of the top plate portion, the upper end portion of the side plate portion and the step portion thereof are easily displaced inward. The coating is hard to be damaged. Moreover, it was possible to prevent damage to the coating film by inserting a synthetic resin film piece from below between the step portion of the side plate portion and the peripheral portion of the top plate portion and fixing with a fixing tape.

  However, at the four corners, when a load is applied to the stepped portion from the corner peripheral portion of the top plate portion, the upper end portion and the stepped portion of the side plate portion are not displaced inward, so that the coating film is easily damaged.

  Especially at the corners, it is not possible to insert a synthetic resin film piece from below between the step part of the side plate part and the peripheral part of the top plate part like the straight part, so it is necessary to attach the film piece at the assembly stage In addition, in order to remove the film piece after installation of the heat pump unit, it is necessary to remove the top plate portion from the side plate portion, so this method is costly and cannot be adopted at all.

  The technique of forming curling on the peripheral edge of the top plate portion of Patent Document 1 is not practical because it is contrary to the demand for downsizing the device and the manufacturing cost is high.

  An object of the present invention is to provide an exterior structure of a heat pump unit that can prevent the stepped portion of the side plate portion from being damaged at the corner peripheral portion of the top plate portion with a simple structure.

  The exterior structure of the heat pump unit according to claim 1 includes a tray-like bottom plate portion that opens upward, a tray-like top plate portion that opens downward, and a side plate portion that connects the bottom plate portion and the top plate portion. It is an exterior structure of a heat pump unit configured in a box shape, and an upper end portion of the side plate portion is provided via a step portion on a fixing portion that fixes an upper end portion of the side plate portion and a peripheral portion of the top plate portion. An upper end displacement plate portion displaced inward is provided, and a peripheral portion of the top plate portion is formed so as to cover the upper end displacement plate portion from the outside, and a lower end portion of a corner peripheral portion of the top plate portion It is characterized in that a notch is formed in.

  The exterior structure of the heat pump unit according to claim 2 is characterized in that, in the invention according to claim 1, the height of the notch is higher than the bending radius of the stepped portion.

  The exterior structure of the heat pump unit according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the notch is formed to extend by a predetermined length on both sides of the peripheral edge of the corner.

  According to the first aspect of the invention, the exterior structure of the heat pump unit is formed in a box shape from the bottom plate portion, the top plate portion, and the side plate portion, and the upper end portion of the side plate portion and the peripheral edge portion of the top plate portion are fixed. The fixing portion is provided with an upper end displacement plate portion in which the upper end portion of the side plate portion is displaced inward through a step portion, and the peripheral portion of the top plate portion covers the upper end displacement plate portion from the outside. Since the notch part was formed in the lower end part of the corner | angular part peripheral part of the said top-plate part while being formed, the following effect is acquired.

  During transport of heat pump units stacked in multiple stages in a packed state, even if a load acts on the top plate part from above and the peripheral part of the top plate part is displaced downward due to elastic deformation of the top plate part, Since the notch is formed in the lower end of the corner peripheral edge of the top plate, the lower end of the corner peripheral does not contact the step of the side plate, so that the coating on the step is damaged. Absent.

  According to the invention of claim 2, since the height of the notch is equal to or higher than the bending radius of the stepped portion, the lower end portion of the peripheral edge portion of the corner is not affected even if vibrations are repeatedly applied during transportation. There is no contact with the stepped portion of the side plate.

  According to invention of Claim 3, since the said notch part is formed so that only predetermined length may be extended on the both sides of the said edge part periphery, the upper end displacement board part of a side plate part in the vicinity part of the said edge part periphery, Even if the stepped portion is less likely to be displaced inward, the notched portion corresponding to the portion is formed, and the coating film on the stepped portion is not damaged.

It is a perspective view of the heat pump unit which concerns on the Example of this invention. It is a principal part disassembled perspective view of a part of heat pump unit and its exterior structure. It is an enlarged view of the A section of FIG. It is a perspective view which shows the state which removed the top-plate part from the state of FIG. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is an enlarged view of the level | step-difference part of FIG.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

  The heat pump unit 1 according to the present embodiment configures a heat pump circuit by connecting a compressor, a condensation heat exchanger, an expansion valve, and an evaporating heat exchanger with a refrigerant pipe, and heat of the refrigerant and the outside air enclosed in the refrigerant pipe Is a device for heating hot and cold water, and these devices are unitized and housed in an exterior structure 2 (hereinafter referred to as an exterior case 2).

As shown in FIGS. 1 and 2, the exterior case 2 is a rectangular parallelepiped shape made of a thin coated steel plate, an air inlet is formed on the back surface, and a blower fan 3 of the evaporative heat exchanger is formed on the front surface. An air discharge port 4 facing the front surface is formed, and a pipe connection portion 5 is formed on the right side surface.
The exterior case 2 is formed in a box shape from a tray-like bottom plate portion 10 opened upward, a tray-like top plate portion 11 opened downward, and a side plate portion 12 connecting the bottom plate portion 10 and the top plate portion 11. It is configured.

The side plate portion 12 includes a front side plate portion 12a that covers a portion other than the air discharge port on the front side surface, a left side plate portion 12b that covers the left side surface, and a right rear side plate portion 12c that covers the right end portion of the right surface and the rear surface.
A condensing heat exchanger (not shown) is accommodated between the top plate portion 11 and the horizontal partition plate 13 below the top plate portion 11, and a part of the bottom plate portion 10, a part of the top plate portion 11, and the right rear surface side plate portion 12c. The machine room partitioned by the vertical partition plate 14 accommodates equipment (not shown) such as a compressor, an expansion valve, and a refrigerant pipe.

As shown in FIGS. 1, 3, and 5, the outer peripheral portion of the top plate portion 11 is formed with a curved portion 11 a and a vertical peripheral portion 11 b having a predetermined vertical width continuous to the lower end of the curved portion 11 a. Yes.
The fixing portion 15 that fixes the upper end portion of the side plate portion 12 and the peripheral edge portion 11b of the top plate portion 11 is formed with an upper end displacement plate portion 12e in which the upper end portion of the side plate portion 12 is displaced inward via the step portion 16. Has been. An inclined portion 12i for guide that is inclined upward and inward from the upper end of the upper end displacement plate portion 12e is also formed.

As shown in FIGS. 5 to 7, the stepped portion 16 includes a first curved portion 16 a that curves inward from the upper end of the flat plate portion 12 f and the partial cylindrical portion 12 g of the side plate portion 12, and the first curved portion 16 a. The second bending portion 16b is bent from the upper end to bend upward.
The upper end displacement plate portion 12e is formed in a shape displaced from the flat plate portion 12f or the partial cylindrical portion 12g inward by about twice the plate thickness of the peripheral edge portion 11b of the top plate portion 11. The peripheral edge portion 11b of the top plate portion 11 is loosely fitted to the upper end displacement plate portion 12e so as to cover the upper end displacement plate portion 12e from the outside. The peripheral edge portion 11b of the top plate portion 11 is displaced at the upper end by a plurality of screws 17. It is fixed to the plate part 12e.

  As shown in FIG. 4, in the partial cylindrical upper end displacement plate portion 12e of each of the four corner portions 12g of the side plate portion 12, the guiding inclined portion 12i is omitted, and the partial cylindrical upper end displacement plate portion 12e is omitted. Two V-shaped recesses 18 are formed on the upper end of the base plate so as to protrude inward. These V-shaped recesses 18 are for improving the workability of pressing the corner 12g of the side plate 12 into a partial cylinder.

  When the packaged heat pump units 1 are stacked and transported, the top plate 11 is elastically deformed by a load acting on the top plate 11 from above, and the corner peripheral edge 11br of the top plate 11 is In order to prevent the lower end portion from contacting the stepped portion 16 in a pressing manner and damaging the coating film, the following cutout portion 19 is formed.

  As shown in FIGS. 3, 6, and 7, in each of the four corner portions 11 r of the top plate portion 11, a notch 19 is formed at the lower end portion of the corner peripheral portion 11 br of the top plate portion 11. . The height H of the notch 19 is desirably a height (for example, 2 to 4 mm) that is greater than or equal to the bending radius of the stepped portion 16 (the bending radius R of the second bending portion 16b).

  The notch 19 includes a curved notch 19a formed at the lower end of the corner peripheral edge 11br, and a linear notch 19b that linearly extends a predetermined length on both sides of the curved notch 19a. including. The linear notch 19 b is formed at the lower end of the flat peripheral edge 11 b of the top plate 11. In order to form the linear cutout portion 19b, the upper end displacement plate portion 12e and the stepped portion 16 of the side plate portion 12 are less likely to be displaced inward in the vicinity of the corner peripheral edge 11br. Since the notch portion is formed, the coating film on the step portion is not damaged.

The operation and effect of the outer case 2 described above will be described.
During transportation of the heat pump units 1 stacked in a plurality of stages in a packed state, a load acts on the top plate portion 11 from above, and the peripheral portion 11b of the top plate portion 11 is displaced downward by elastic deformation of the top plate portion 11. Even so, since the notch 19 is formed at the lower end of the corner peripheral portion 11br of the top plate portion 11, the lower end of the corner peripheral portion 11br does not contact the stepped portion 16 of the side plate portion 12. The coating film of the step portion 16 is not damaged.

  Since the height H of the notch portion 19 is equal to or greater than the bending radius R of the step portion 16, even if the horizontal dimension of the step portion 16 is made smaller than the state shown in FIG. Even so, the lower end portion of the corner peripheral portion 11br does not contact the stepped portion 16 of the side plate portion 12. And since the height H of the notch part 19 is about 2-4 mm, the external appearance of the exterior case 2 does not deteriorate.

  In particular, the cutout portion 19 includes a curved cutout portion 19a formed at the lower end of the corner peripheral portion 11br, and a linear cutout portion extending linearly by a predetermined length on both sides of the curved cutout portion 19a. 19b, in the vicinity of the corner peripheral edge portion 11br, even if the upper end displacement plate portion 12e and the stepped portion 16 of the side plate portion 12 are less likely to be displaced inward, a linear notch corresponding to that portion. Since 19b is formed, the coating film of the stepped portion 16 is not damaged.

  The above-described embodiment is merely an example, and those skilled in the art can implement the present invention by adding various modifications to the above-described embodiment without departing from the spirit of the present invention. Is also included.

1 Heat pump unit 2 Exterior case (exterior structure)
DESCRIPTION OF SYMBOLS 10 Bottom plate part 11 Top plate part 11b Peripheral part 11br Corner | edge peripheral part 12 Side plate part 12e Upper end displacement plate part 15 Fixing part 16 Step part 19 Notch part 19a Curved notch part 19b Linear notch part

Claims (3)

An exterior structure of a heat pump unit configured in a box shape from a tray-like bottom plate portion opened upward, a tray-like top plate portion opened downward, and a side plate portion connecting the bottom plate portion and the top plate portion Because
The fixing portion that fixes the upper end portion of the side plate portion and the peripheral portion of the top plate portion is provided with an upper end displacement plate portion that displaces the upper end portion of the side plate portion inward via a stepped portion. A heat pump unit characterized in that a peripheral portion of the plate portion is formed so as to cover the upper end displacement plate portion from the outside, and a notch portion is formed at a lower end portion of a corner peripheral portion of the top plate portion. Exterior structure.   The exterior structure of the heat pump unit according to claim 1, wherein the height of the notch is equal to or higher than the bending radius of the step.   The exterior structure of a heat pump unit according to claim 1 or 2, wherein the notch is formed to extend a predetermined length on both sides of the peripheral edge of the corner.