JP2016114343A - Outdoor machine of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor machine of an air conditioner facilitating installation work.SOLUTION: An outdoor machine 3 includes a casing 20, and a shut-off valve cover 30 attached to the side surface of the casing 20. In the casing 20, a fan blowout port 27 is formed on its front surface, and a valve opening/closing a refrigerant circuit is attached to the side surface in an exposed manner. Formed is a machine screw hole 32a, as a machine screw stationary part, penetrating a machine screw in a direction from the front surface of the casing 20 toward the back surface thereof.SELECTED DRAWING: Figure 11

Description

  The present invention relates to an outdoor unit for an air conditioner, and more particularly to an outdoor unit for an air conditioner having a refrigerant circuit.

  Conventionally, as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2010-281461), an outdoor unit of an air conditioner is used for refrigerant piping connected to the indoor unit of the air conditioner. Some have a shut-off valve. In some of such outdoor units, a closing valve is provided on one side surface of the casing of the outdoor unit. In such an outdoor unit of an air conditioner, a closing valve cover as described in Patent Document 1 is attached to one side surface of the casing in order to protect the closing valve and close the opening on the side surface of the casing. .

  However, in order to fix the conventional closing valve cover as described in Patent Document 1 to the side surface of the casing, a screw is applied to the closing valve cover temporarily fixed to the side surface of the casing of the outdoor unit. It is necessary to drive the screw with a fastening tool such as a screwdriver from the side surface of the casing in a state where the screw is set perpendicular to the side surface. For this reason, in an outdoor unit installation environment in which no gap is provided between the closing valve cover and the closing valve cover, the closing valve cover is fixed to the side surface of the casing by screwing the closing valve cover first. It is necessary to install an outdoor unit with a cover fixed.

  In this way, when the outdoor unit is installed in the installation environment after fixing the closing valve cover first, the refrigerant pipe is already attached to the shut-off valve, so the outdoor unit is moved toward the installation environment. During the operation, the refrigerant piping may be damaged, or an operator who moves the outdoor unit toward the installation environment may be easily injured, which may make installation work difficult.

  An object of the present invention is to provide an outdoor unit of an air conditioner that can be easily installed.

  The outdoor unit of the air conditioner according to the first aspect of the present invention has a casing in which a fan outlet is formed on the front surface and a valve that opens and closes the refrigerant circuit is exposed on the side surface, and the front surface to the rear surface of the casing. A screw fixing portion that penetrates the screw in the direction is formed, and includes a valve cover that is attached to a side surface of the casing to cover the valve.

  In the outdoor unit of the air conditioner according to the first aspect, the screw cover is formed in the valve cover so as to penetrate the screw in the direction from the front to the back, so that there is a fan outlet and the work space is on the front side. In the secured outdoor unit, installation work is facilitated by driving a screw from the front side.

  An outdoor unit for an air conditioner according to a second aspect of the present invention is the outdoor unit for an air conditioner according to the first aspect, wherein the casing has a burring forming portion that abuts on the back side of the screw fixing portion.

  In the outdoor unit of the air conditioner according to the second aspect, since the burring forming portion comes into contact with the screw fixing portion of the valve cover from the back side, the state where the screw fixing portion and the burring forming portion are superposed can be easily maintained, It is possible to prevent the screw fixing portion from moving to the back side when the screw is driven from the side.

  The outdoor unit of the air conditioner according to the third aspect of the present invention is the outdoor unit of the air conditioner according to the first aspect or the second aspect, wherein the valve cover has a direction in which the screw penetrates the screw fixing portion on the side surface of the casing. On the other hand, the screw fixing portion is formed so as to have a predetermined first angle in the horizontal direction.

  In the outdoor unit of the air conditioner according to the third aspect, the direction in which the screw penetrates the screw fixing portion has a predetermined first angle in the horizontal direction with respect to the side surface of the casing. As a result, the fastening tool cannot easily hit the side surface of the casing, and the work using a relatively large fastening tool such as an electric tool is facilitated.

  An outdoor unit for an air conditioner according to a fourth aspect of the present invention is the outdoor unit for an air conditioner according to any one of the first to third aspects. In the valve cover, the direction in which the screw penetrates the screw fixing portion is horizontal. The screw fixing part is formed so as to have a predetermined second angle vertically upward.

  In the outdoor unit of the air conditioner according to the fourth aspect, the direction in which the screw penetrates the screw fixing portion has a predetermined second angle vertically upward with respect to the horizontal plane. Thus, even when the screw fixing portion is relatively close to the installation surface, the work can be performed from a relatively high position above the screw fixing portion.

  In the outdoor unit of an air conditioner according to the first aspect of the present invention, installation work in a narrow installation place is facilitated.

  In the outdoor unit for an air conditioner according to the second aspect of the present invention, the screwing operation is facilitated.

  In the outdoor unit for an air conditioner according to the third aspect of the present invention, a screwing operation using a relatively large fastening tool is facilitated.

  In the outdoor unit of the air conditioner according to the fourth aspect of the present invention, the burden on the operator is reduced.

The circuit diagram for demonstrating the outline | summary of the air conditioner which concerns on one Embodiment of this invention. The perspective view which shows an example of the external appearance of an outdoor unit. The perspective view for demonstrating the installation environment of an outdoor unit. The exploded perspective view of an outdoor unit and a closing valve cover. The top view which shows the front part of the closing valve cover shown by FIG. The top view which shows the side part of the closing valve cover shown by FIG. FIG. 5 is a plan view showing a rear portion of the closing valve cover shown in FIG. 4. The partial expansion perspective view which looked at the upper part of the shut-off valve cover from back part diagonally upward. The partial expanded sectional view which expanded the upper part of the closing valve cover. 6A is an end view taken along the line II of FIG. 6, FIG. 10B is an end view showing a state where the closing valve cover of FIG. 10A is fixed to the left side plate, and FIG. 10C is perpendicular to FIG. End view of various directions. The perspective view for demonstrating the positional relationship of an outdoor unit and a fastening tool.

(1) Configuration of Air Conditioner FIG. 1 shows an outline of a circuit configuration of an air conditioner 10 according to an embodiment of the present invention. The air conditioner 1 includes a refrigerant circuit 2 and performs a vapor compression refrigeration cycle by circulating the refrigerant in the refrigerant circuit 2. As shown in FIG. 1, for example, the refrigerant circuit 2 has a configuration in which one outdoor unit 3 and one indoor unit 4 are connected by refrigerant pipes 5 and 6.

  Specifically, the refrigerant circuit 2 includes a compressor 11, a four-way switching valve 12, an outdoor heat exchanger 13, an expansion mechanism 14, an indoor heat exchanger 15, an accumulator 16, and a liquid side closing valve 17. And a gas side closing valve 18. An indoor heat exchanger 15 is disposed in the indoor unit 4. The outdoor unit 3 includes a compressor 11, a four-way switching valve 12, an outdoor heat exchanger 13, an expansion mechanism 14, an accumulator 16, a liquid side closing valve 17, and a gas side closing valve 18. ing. The four-way switching valve 12 is connected to the suction side of the compressor 11 via the first port connected to the discharge side of the compressor 11, the second port connected to the outdoor heat exchanger 13, and the accumulator 16. A third port and a fourth port connected to the indoor heat exchanger 15 via the gas-side shut-off valve 18. In addition, one end of the expansion mechanism 14 is connected to the outdoor heat exchanger 13, and the other end of the expansion mechanism 14 is connected to the indoor heat exchanger 15 via the liquid side shut-off valve 17.

  During the cooling operation, the four-way switching valve 12 is switched to the connection indicated by the solid line in FIG. Due to the circuit connection during the cooling operation, the refrigerant discharged from the compressor 11 flows from the first port of the four-way switching valve 12 to the second port, the outdoor heat exchanger 13, the expansion mechanism 14, and the liquid side closing valve 17. Then, the indoor heat exchanger 15, the gas side closing valve 18, the fourth port to the third port of the four-way switching valve 12, and the accumulator 16 are circulated in this order and returned to the suction side of the compressor 11.

  During the heating operation, the four-way switching valve 12 is switched to the connection indicated by the broken line in FIG. By such circuit connection during heating operation, the refrigerant discharged from the compressor 11 flows from the first port to the fourth port of the four-way switching valve 12, the gas-side shut-off valve 18, the indoor heat exchanger 15, and the liquid-side shut-off. The valve 17, the expansion mechanism 14, the outdoor heat exchanger 13, the second port to the third port of the four-way switching valve 12, and the accumulator 16 are circulated in this order and returned to the suction side of the compressor 11.

(2) Outdoor unit 3
The outdoor unit 3 has an appearance as shown in FIG. In FIG. 2, the top surface, bottom surface, left side surface, right side surface, front surface, and back surface of the outdoor unit 3 are arranged on the side indicated by the arrows. The direction from the front to the back is the Y-axis direction, the direction from the left side to the right side is the X-axis direction, and the direction from the top to the bottom is the Z-axis direction. The outdoor unit 3 includes a substantially rectangular parallelepiped casing 20 and a closing valve cover 30 fixed to the left side surface of the casing 20. The casing 20 has a front plate 21 on the front side, a left side plate 22 on the left side, and a top plate 23 on the top side. Although not shown in FIG. 2, an opening for taking outdoor air into the outdoor heat exchanger 13 is provided on the back side, a right side plate is provided on the right side, and a bottom plate is provided on the bottom side. The fan air outlet 27 shown in FIG. 2 is formed in the front plate 21 on the front. The outdoor air sucked from the opening on the back side passes through the outdoor heat exchanger 13 and is blown out from the fan outlet 27.

  FIG. 3 shows an example of the outdoor unit 3 installed on the balcony 100. The installation state of the outdoor unit 3 shown in FIG. 3 is that there is a wall 101 of the building on the left side of the outdoor unit 3, and there is a space where an operator can enter between the left side plate 22 and the wall 101. The situation does not exist. Further, the right side surface side of the outdoor unit 3 is in a state where it is likely to come into contact with the wall 102 of the balcony 100. Further, FIG. 3 shows an example in which the refrigerant pipes 5 and 6 extending from the closing valve cover 30 of the outdoor unit 3 are attached along the wall 103 of the balcony 100.

  FIG. 4 shows a state where the closing valve cover 30 is separated from the casing 20. The liquid side shut-off valve 17 and the gas side shut-off valve 18 projecting out of the casing 20 from the left side plate 22 of the casing 20 are disposed at the lower part of the left side plate 22. In the upper part of the left side plate 22, an opening 22 a for accessing equipment inside the casing 20, attaching a member extending outward from the casing 20, and a protruding member is formed. In addition, the left side plate 22 is formed with a locking hole 22b and a screw hole 22c for fixing the closing valve cover 30. The screw hole 22c is a burring hole that has been subjected to burring. The screw hole 22c is also provided in the opening 22a. The screw hole 22c is formed in a burring forming portion 22d protruding toward the opening 22a. The burring forming portion 22 d is formed of the same metal plate as the left side plate 22 and is bent with respect to the left side plate 22.

(3) Closing valve cover 30
FIG. 5 shows a state in which the closing valve cover 30 is viewed from the left side direction of the outdoor unit 3, that is, the front portion of the closing valve cover 30. FIG. 6 shows a state in which the closing valve cover 30 is viewed from the front direction of the outdoor unit 3, that is, a side portion of the closing valve cover 30. FIG. 7 shows a state in which the closing valve cover 30 is viewed from the right side direction of the outdoor unit 3, that is, the rear part of the closing valve cover 30. Moreover, the state which looked at the upper part of the shut-off valve cover 30 from the back diagonally upward is shown by FIG. Further, FIG. 9 shows a cross section of the upper portion of the closing valve cover 30.

  The closing valve cover 30 is provided with a flat plate-shaped cover peripheral edge portion 31 that is in close contact with the left side plate 22. In the closing valve cover 30, a bulging portion 32 is formed in an area surrounded by the cover peripheral edge portion 31. The liquid side closing valve 17 and the gas side closing valve 18 are accommodated in a space formed between the bulging portion 32 and the left side plate 22. The cover peripheral part 31 is interrupted by a step for forming the pipe lead-out part 31a. The pipe lead-out portion 31 a is an opening facing outward in a space formed by the bulging portion 32 and the left side plate 22. The refrigerant pipes 5 and 6 shown in FIG. 3 are drawn out from the closing valve cover 30 through the pipe lead-out portion 31a. A heat insulating material and a plastic sheath are wound around the refrigerant pipes 5 and 6, and the outer shape of the refrigerant pipes 5 and 6 is set to the size of the opening surrounded by the pipe lead-out portion 31 a and the left side plate 22. Yes. Therefore, the opening surrounded by the pipe lead-out part 31a and the left side plate 22 is closed by the refrigerant pipes 5 and 6 with almost no gap. Further, as shown in FIGS. 6 and 7, a screw hole 32 a is formed in the bulging portion 32 at a position corresponding to the screw hole 22 c of the left side plate 22. This screw hole 32a is a screw fixing portion.

  A handle portion 33 that is recessed from the front portion to the rear portion of the closing valve cover 30 is formed on the upper portion of the bulging portion 32 of the closing valve cover 30. The closing valve cover 30 is strong enough to hold the handle 33 and lift the outdoor unit 3 while the closing valve cover 30 is fixed to the casing 20. A small ventilation hole 34 is formed at a substantially central portion of the closing valve cover 30 so as not to allow insects to enter.

  When the rear side of the closing valve cover 30 is viewed, locking claws 31 c are formed at five locations on the cover peripheral edge portion 31. These locking claws 31 c are formed at positions corresponding to the locking holes 22 b of the left side plate 22. Each of the locking claws 31 c is formed in an L shape when viewed from the side, and is configured to be hooked on the back side of the left side plate 22 when inserted into the locking hole 22 b and lifted up. As can be seen from FIG. 6, a rib 35 is formed on the upper rear side of the closing valve cover 30. The rib 35 is formed so as to be hooked on the upper end portion of the opening 22 a of the left side plate 22, and has a strength capable of receiving a load applied from the casing 20 when the outdoor unit 3 is lifted by grasping the handle portion 33. When the screw passes through the screw hole 32a and the shut-off valve cover 30 is fixed, the locking claw 31c and the upper surface of the rib 35 are fixed in a state where they are in contact with or close to the left side plate 22.

  For example, when the closing valve cover 30 is attached as shown in FIG. 3, when the driver 40 is used in a direction perpendicular to the left side surface of the outdoor unit 3, the driver 40 hits the wall 101 of the building. Even in an installation environment where work cannot be performed, work can always be performed on the front side where the fan outlet 27 is located. As a result, even when the driver 40 cannot be used on the side surface side of the outdoor unit 3 as in the conventional case, the closing valve cover 30 can be fixed using the screw hole 32a after the casing 20 is fixed at a predetermined position.

  As shown in FIG. 10A, the screw hole 32a is formed in the bulging portion 32 that rises slightly obliquely. Therefore, as shown in FIG. 10B, the burring forming portion 22 d is also bent slightly diagonally along the back surface of the bulging portion 32. As shown in FIG. 10C, the burring forming portion 22d abuts the screw hole 32a from the back side, so that the state where the screw hole 32a and the screw hole of the burring forming portion are superposed can be easily maintained. Can do.

  FIG. 11 shows the angle of the driver 40, that is, the angle into which the screw 50 (see FIG. 10) is screwed. In FIG. 11, the alternate long and short dash line is the axial direction of the screw 50. The angle formed by the alternate long and short dash line with the YZ plane, that is, the left side plate 22, is α. That is, the screw hole 32a and the screw hole 22c are formed so that the direction in which the screw 50 passes through the screw hole 32a (the direction of the dashed line) has the first angle α in the horizontal direction with respect to the left side plate 22 of the casing 20. It is that. In FIG. 11, a perpendicular foot is dropped on an XY plane from an arbitrary point on an alternate long and short dash line, and a broken line passing through the foot is drawn from the screw hole 32 a. The angle formed by the broken line and the Y axis in the XY plane is the first angle α. Thus, since the screw 50 penetrates at the first angle α, the fastening tool can be inserted from the front side of the casing 20 and the left side plate 22 of the casing 20 is difficult to hit.

  In addition, an angle formed by the alternate long and short dash line with the XY plane, that is, the horizontal plane is γ. That is, the screw hole 32a and the screw hole 22c are formed such that the direction in which the screw 50 passes through the screw hole 32a (the direction of the alternate long and short dash line) has a second angle γ vertically upward with respect to the horizontal plane. is there. In FIG. 11, the angle formed by the broken line and the alternate long and short dash line is the second angle γ.

  Since the screw 50 penetrates at the second angle γ in this manner, the fastening tool can be inserted from the upper front side of the casing 20 and the operator can work at a position higher than the screw hole 32a. When the first angle α and the second angle γ are provided, the surface of the burring forming portion 22d is inclined by the first angle α and the second angle γ, and the screw 50 passes through the screw hole 32a (the direction of the one-dot chain line). It is preferable to form it so as to be perpendicular to. In order to incline the second angle γ, for example, when the burring forming portion 22d is bent, the fold line may be bent so as to have an angle γ with respect to the vertical direction.

(4) Features (4-1)
As described above, the screw hole 32a formed in the closing valve cover 30 (an example of the valve cover) is formed so that the screw 50 penetrates from the front surface of the casing 20 to the back surface. In the outdoor unit 3, there is a fan outlet 27 on the front side of the casing 20, and a work space is secured on the front side. As a result, installation work in a narrow installation place is facilitated by driving a screw from the front side. The valve cover may cover a valve body other than the liquid side closing valve 17 and the gas side closing valve 18.

(4-2)
As shown in FIG. 10 (b), the burring forming portion 22d abuts on the screw hole 32a (an example of the screw fixing portion) of the closing valve cover 30 from the back side. As shown in the figure, the state where the screw hole 32a and the screw hole 22c of the burring forming portion 22d are superposed is easily maintained, and the screw hole 32a is prevented from moving to the back side when the screw 50 is driven from the front side. And screwing work becomes easy.

(4-3)
As shown in FIG. 11, the direction in which the screw 50 passes through the screw hole 32 a has a predetermined first angle α in the horizontal direction with respect to the side surface of the casing 20. You can plug it in. As a result, it becomes difficult for the fastening tool to hit the side surface of the casing 20, work using a relatively large fastening tool such as an electric tool is facilitated, and screwing work using a relatively large fastening tool is facilitated.

(4-4)
As shown in FIG. 11, since the direction in which the screw 50 passes through the screw hole 32a has a predetermined second angle γ vertically upward with respect to the horizontal plane, the fastening tool can be inserted from diagonally above the screw hole 32a. Thus, even when the screw hole 32a is relatively close to the installation surface, the work can be performed from a relatively high position above the screw hole 32a, thereby reducing the burden on the operator.

(5) Modification (5-1) Modification 1A
In the above embodiment, the case where the screw hole 32a that is the screw fixing portion is provided on the side portion of the bulging portion 32 of the closing valve cover 30 has been described. It may be formed. For example, a screw fixing portion that allows the screw 50 to penetrate from the front surface of the casing 20 to the back surface can be formed by providing a portion inclined forward in the upper surface 32b.

(5-2) Modification 1B
Although the case where the closing valve cover 30 is attached to the left side surface of the casing 20 has been described in the above embodiment, the present invention can be applied to the case where the closing valve cover 30 is attached to the right side surface of the casing 20.

DESCRIPTION OF SYMBOLS 1 Air conditioner 20 Casing 22d Burring formation part 27 Fan blower outlet 30 Closing valve cover (example of valve cover)
32a Screw hole (Example of screw fixing part)

JP 2010-281461 A

Claims (4)

A casing (20) formed with a fan outlet (27) on the front face and attached so that a valve for opening and closing the refrigerant circuit is exposed on the side surface;
An air conditioner comprising: a screw fixing portion (32a) that penetrates a screw in a direction from the front surface to the back surface of the casing; and a valve cover (30) attached to the side surface of the casing to cover the valve. The outdoor unit of the machine. The casing has a burring forming portion that contacts the back side of the screw fixing portion.
The outdoor unit of the air conditioner according to claim 1. In the valve cover, the screw fixing portion is formed such that a direction in which the screw penetrates the screw fixing portion has a predetermined first angle in a horizontal direction with respect to the side surface of the casing.
The outdoor unit of the air conditioner of Claim 1 or Claim 2. In the valve cover, the screw fixing portion is formed such that a direction in which the screw penetrates the screw fixing portion has a predetermined second angle vertically upward with respect to a horizontal plane.
The outdoor unit of the air conditioner as described in any one of Claim 1 to 3.

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