JP2006071200A - Outdoor unit for engine heat pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit for an engine heat pump, having a reduce noise level by reducing the vibration of a lower plate of a top plate constructed in upper and lower double layers. <P>SOLUTION: The outdoor unit 1 for an engine heat pump comprises a casing 2 having an internal space partitioned into upper and lower two spaces with the top plate 3. The upper side space is a heat exchange chamber 4, and the lower side space is an engine chamber 5. The top plate 3 is constructed in upper and lower double layers by an upper plate 31 on which a device in a heat exchanger 4 is installed and a lower plate 32 arranged under the upper plate 31. A space between the upper and lower plates 31/32 is a ventilating passage 33. The lower plate 32 is supported via vibration absorbing devices 35/35 by supporting members 51/52 of the lower plate 32. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to the structure of an outdoor unit of an engine heat pump, and particularly relates to measures against vibration and noise.

As shown in FIG. 6, the conventional outdoor unit 100 of the engine heat pump includes equipment and devices such as a compressor 122, an engine 121 that drives the compressor 122, a heat exchanger body 111, and a heat exchange fan 112. These devices and apparatuses are configured to be accommodated in one housing 102.
The internal space of the housing 102 is divided into two upper and lower spaces by the top plate 103, the upper space is used as the heat exchange chamber 104 in which the heat exchanger main body 111 and the like are stored, and the lower space is stored in the engine 121 and the like. The engine chamber 105 is used (see, for example, Patent Document 1).

Also, a technique is known in which the top plate 103 has a double top and bottom structure to form a ventilation passage 133 for exhausting hot air in the engine compartment, and the ventilation passage 133 is an expansion chamber having a silencing effect. (For example, refer to Patent Document 1).
An upper plate 131 (hereinafter referred to as “upper plate 131”) of the top plate 103 functions as an installation base on which devices in the heat exchange chamber 104 are installed, and rainwater that has entered the heat exchange chamber 104. Etc. are functioned as a drain pan for preventing intrusion into the engine chamber 105. The upper plate 131 is configured to be directly fixed to the columns 141 and 142 erected from the platform 126 by welding, coupling with bolts, or the like.
Further, the lower plate 132 (hereinafter referred to as “lower plate 132”) of the top plate 103 is directly fixed to the columns 141 and 142 supporting the upper plate 131 by welding, coupling with bolts, or the like. It was supposed to be configured.

Moreover, the structure which makes the base floor which installs the engine 121 and the compressor 122 into an upper and lower double structure is also well-known (for example, refer patent document 1).
In the configuration of FIG. 6, the upper apparatus installation plate 127 and the lower platform 126 are configured.
The pedestal 126 constitutes the lower outer wall surface of the outdoor unit, and supports 141 and 142 are erected upward from the pedestal 126. A device installation plate 127 is fixed directly in the middle in the vertical direction of the columns 141 and 142 by welding, coupling with bolts, or the like, and the engine 121 and the compressor 122 are installed on the device installation plate 127. Is done. The device installation plate 127 is provided with anti-vibration rubbers 124 and 124 as anti-vibration devices, and the anti-vibration rubbers 124 and 124 support the engine 121 and the compressor 122.
JP 11-337131 A

As above-mentioned, a top plate and a base are made into an up-and-down double structure.
However, the vibration energy generated from the vibration source such as the engine 121 and the compressor 122 with respect to the device installation plate 127 cannot be absorbed by the anti-vibration rubbers 124 and 124, and the device installation plate 127 vibrates and generates noise. There was a problem to do. Since the device installation plate 127 is directly fixed to the columns 141 and 142 by welding, bolts, or the like, the vibration energy of the device installation plate 127 is transmitted via the columns 141 and 142. It is directly transmitted to the base 126. As a result, even the floor 126 is vibrated, and noise is generated due to the vibration.

Furthermore, since the vibration energy is transmitted to the top plate 103 via the columns 141 and 142, there is a problem that the top plate 103 vibrates and generates noise.
Here, since the heavy material such as the heat exchanger 111 is installed on the upper plate 131, it is necessary to directly fix the support columns 141 and 142 by welding, coupling with bolts, or the like. is there. Therefore, the vibration energy is directly transmitted to the upper plate 131, and the upper plate 131 is to vibrate.
On the other hand, the lower plate 132 only serves as a wall for forming a ventilation passage, and a heavy object is not placed thereon. Therefore, it can be said that the lower plate 132 does not need to be directly fixed to the support columns 141 and 142 by welding, bolts, or the like. That is, it can be said that the lower plate 132 may be fixed to the support columns 141 and 142 by another fixing method.

The present invention pays attention to the above points, and for the pedestal, the method for fixing the device installation plate 127 is changed, and the vibration energy transmitted from the device installation plate 127 to the pedestal 126 is reduced. This is intended to reduce the vibrations.
The top plate 103 is also configured to reduce the vibration of the lower plate 132 by changing the fixing method of the lower plate 132 and reducing the vibration energy transmitted to the lower plate 132.
Then, the noise level is lowered by reducing the vibration of the floor 126 and the lower plate 132 described above.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, as described in claim 1, an outdoor unit of an engine heat pump in which the internal space of the casing is divided into two upper and lower spaces by a top plate, the upper space is a heat exchange chamber, and the lower space is an engine chamber. The top plate is configured to be vertically doubled from an upper plate on which a device in the heat exchange chamber is installed and a lower plate disposed below the upper plate, and a space between the upper and lower plates is formed. The lower plate is configured to be supported by a support member of the lower plate through a vibration isolator.

  According to a second aspect of the present invention, the lower plate is surrounded by an elastic member, and the elastic member closes a gap that communicates the space in the engine room and the space in the ventilation passage. It is set as the structure which can be peeled off.

  Further, as described in claim 3, an outdoor unit of an engine heat pump having a configuration in which the internal space of the casing is divided into two upper and lower spaces by a top plate, the upper space is a heat exchange chamber, and the lower space is an engine chamber. In addition, a vibration isolating device is provided on the platform that forms the bottom surface of the engine chamber, and the vibration isolating device supports a device installation plate for installing the engine.

  According to a fourth aspect of the present invention, the periphery of the device installation plate is surrounded by an elastic member, and the elastic member communicates the space in the engine room with the space below the device installation plate. The gap is closed.

  As effects of the present invention, the following effects can be obtained.

  That is, in the first aspect of the invention, the vibration isolator is interposed between the lower plate and the support column supporting the lower plate, and the vibration energy transmitted from the support column side to the lower plate is reduced. Will be able to. Then, the vibration of the lower plate can be reduced, and the noise level generated due to the vibration of the lower plate can be reduced.

In the invention according to claim 2, the air tightness of the engine compartment is maintained by the elastic member, that is, noise leaking upward from the lower plate can be blocked by the elastic member. Reduction can be achieved.
Further, since the lower plate does not contact the upper plate or the outer plate, it is possible to prevent the generation of noise based on the contact.

  Further, in the invention described in claim 3, the vibration energy transmitted to the device installation plate can be reduced (absorbed) by the vibration isolator, and noise caused by the vibration of the device installation plate can be reduced. it can.

  In the invention according to claim 4, noise leaking downward from the apparatus installation plate can be blocked by the elastic member, and the noise level can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the outdoor unit 1 of the engine heat pump shown in FIG. 1, the internal space of the housing 2 is divided into two upper and lower spaces by a top plate 3, and the upper space is housed with a heat exchanger main body 11, an outdoor unit fan 12, and the like. The heat exchange chamber 4 is used, and the lower space is an engine chamber 5 in which the engine 21, the compressor 22, and the like are accommodated.
The engine 21 and the compressor 22 are installed on the floor 26 via vibration isolators 24 and 25. A plurality of support posts 41, 42, and 43 are erected upward on the platform 26, and the top plate 3 is supported by the support posts 41, 42, and 43.
Moreover, the opening part between these support | pillars 41 * 42 * 43 is block | closed with the outer plate | board 49, and it is set as the space where the inside of the engine chamber 5 was closed.

The top plate 3 has a double structure composed of an upper plate 31 positioned on the upper side and a lower plate 32 positioned on the lower side, and a ventilation passage 33 is formed between the plates 31 and 32. Hot air in the engine chamber 5 is sent to the heat exchange chamber 4 through the ventilation passage 33. The inlet opening 32a of the ventilation passage 33 is provided on the left side of the lower plate 32, while the outlet opening 31a of the ventilation passage 33 is provided on the right side of the upper plate 31. The distance from the inlet opening 32a to the outlet opening 31a is configured to be long, so that the silencing effect is exhibited.
The upper plate 31 functions as an installation base on which the devices in the heat exchange chamber 4 are installed, and also functions as a drain pan for preventing rainwater or the like that has entered the heat exchange chamber 4 from entering the engine chamber 5. It is like that.

  In addition, as shown in FIG. 2, vibration isolation devices 25, 25 are installed at a plurality of locations on the floor 26, and device installation plates 27 are supported by the vibration isolation devices 25, 25. Further, engine mounting tables 28 and 29 are installed on the device installation plate 27. Further, vibration isolators 24 and 24 are installed on the engine mounting bases 28 and 29, respectively, and the engine support frame 20 is supported above the vibration isolators 24 and 24. An engine 21 and a compressor 22 are fixed to the engine support frame 20.

  As described above, the outdoor unit 1 divides the internal space of the housing 2 into two upper and lower spaces by the top plate 3, the upper space is the heat exchange chamber 4, and the lower space is the engine chamber 5. Further, support columns 41, 42, and 43 are erected from a floor 26 of the engine room 5 where the compressor 22 is installed, and the top plate 3 is supported by the support columns 41, 42, and 43.

Next, the structure of the top plate 3 having a double upper / lower structure will be described.
As shown in FIG. 2 to FIG. 4, the top plate 3 is vertically doubled from an upper plate 31 on which a device in the heat exchange chamber 4 is installed and a lower plate 32 disposed below the upper plate 31. It is assumed that the space of the upper and lower plates 31 and 32 is formed in the ventilation passage 33, and the lower plate 32 is supported by the support members 51 and 52 of the lower plate 32 through vibration isolators 35 and 35. It is assumed to be configured.

Hereinafter, the configuration of the top plate 3 will be described in detail. As shown in FIGS. 3 and 4, the upper plate 31 has a drain pan 31b that forms a horizontal plane, and a side surface 31c that is formed by bending the end surface of the drain pan 31b downward. The box is open at the bottom.
The lower plate 32 includes a bottom plate surface 32b that forms a horizontal plane, and a side surface 32c formed by bending an end surface of the bottom plate surface 32b upward, and has a box shape with an open upper surface.
In addition, the upper plate 31 and the lower plate 32 are arranged so that the side surfaces 31c and 32c of both plates 31 and 32 overlap in the vertical direction, and thereby, between the drain pan 31b and the bottom plate surface 32b. A space is formed.
Further, as shown in FIGS. 2 and 3, a stay 53 having a width in the depth direction in the drawing is provided in the upper left part of the engine chamber 5. The depth width of the stay 53 is substantially the same as that of the upper plate 31, and the height position of the floor surface 53 a is substantially the same as the bottom plate surface 32 b of the lower plate 32. The ceiling surface of the engine room 5 is formed by the bottom plate surface 32 b of the plate 32. The right end surface of the stay 53 is bent upward to form an upright side surface 53b, and the upper end of the upright side surface 53b is abutted against the lower surface of the upper plate 31. The left side wall of is formed. In the case where the stay 53 is not provided, the lower plate 32 is extended by the width of the stay 53.

  The bottom plate surface 32b of the lower plate 32 is provided with an inlet opening 32a, and the drain pan 31b of the upper plate 31 is provided with an outlet opening 31a, thereby forming between the drain pan 31b and the bottom plate surface 32b. This space functions as a ventilation passage 33. That is, the hot air in the engine room 5 flows into the ventilation passage 33 from the inlet opening 32 a and is discharged into the heat exchange chamber 4 from the outlet opening 31 a through the ventilation passage 33.

As shown in FIG. 2, the stay 53 is provided with a support member 51 for supporting the lower plate 32. Similarly, a support member 52 for supporting the lower plate 32 is also provided on the upper portion of the column 46. Thus, the support members 51 and 52 for supporting the lower plate 32 are arranged at a plurality of locations.
The support members 51 and 52 are provided with vibration isolators 35 and 35, respectively. As shown in FIG. 3, in this embodiment, the vibration isolator 35 protrudes upward from the elastic body 35 a made of rubber or the like and the elastic body 35 a and is inserted into the through hole in the bottom plate surface 32 b of the lower plate 32. The locking pin 35b is composed of a coupling member 35c for fixing the elastic body 35a to the support member 51, and the bottom plate surface 32b of the lower plate 32 is placed on the upper surface of the elastic body 35a. It has become so. The elastic body 35a may be a resin or a spring in addition to rubber.
As described above, the lower plate 32 is configured to be supported by the support members 51 and 52 of the lower plate 32 through the vibration isolating devices 35 and 35.

  And according to the above structure, the vibration isolator 35 will be interposed between the lower board 32 and the support | pillars 44 and 46 which support this, and it will be transmitted to the lower board 32 from the support | pillars 44 and 46 side. Vibration energy can be reduced. The vibration of the lower plate 32 can be reduced, and the noise level generated due to the vibration of the lower plate 32 can be reduced.

As shown in FIGS. 3 and 4, the lower plate 32 is surrounded by an annular elastic member 36, and the elastic member 36 allows the space in the engine compartment 5 and the ventilation passage 33 to be surrounded by the elastic member 36. The gap communicating with the space is closed.
As shown in FIG. 3, an elastic member 36 is sandwiched between the side surface 31 c of the upper plate 31 and the side surface 32 c of the lower plate 32. In the drawing, the elastic member 36 is sandwiched between the side surface 32 c and the standing side surface 53 b of the stay 53 for the portion forming the left side of the side surface 32 c of the lower plate 32.
In this embodiment, since the side surface 31c is provided on the upper plate 31 of the top plate 3, the wall surface of the ventilation passage 33 is formed by the side surface 31c, but the outer plate 49 (FIG. 1) is used. For example, the wall surface of the ventilation passage 33 may be formed, and the elastic member 36 may be sandwiched between the outer plate 49 and the lower plate 32.
As described above, the space between the upper plate 31 and the lower plate 32 is configured as a sealed ventilation passage 33 except for the openings 32a and 31a.

According to the above configuration, the air tightness of the engine compartment 5 is maintained by the elastic member 36, that is, noise leaking upward from the lower plate 32 can be blocked by the elastic member 36. The level can be lowered.
Further, since the lower plate 32 does not contact the upper plate 31 or the outer plate 49, it is possible to prevent the generation of noise based on the contact.

Next, the structure of the apparatus installation board 27 and the base floor 26 is demonstrated.
As shown in FIG. 2 and FIG. 5, a vibration isolator 25, 25 is provided on the base 26 constituting the bottom surface of the engine chamber 5, and the engine 21 is installed in the vibration isolator 25, 25. The installation plate 27 is supported.
In addition, in the front view shown in FIG. 2, a groove member 26 a is installed on the platform floor 26 in the left-right direction. The groove mold members 26a are provided in two rows in the depth direction of FIG. 2, and vibration isolators 25 and 25 are installed in the respective groove mold members 26a at intervals.
Further, as shown in FIG. 5, in this embodiment, the vibration isolator 25 is protruded upward from the elastic body 25 a made of rubber or the like, and inserted into the through hole of the upper surface 27 b of the apparatus installation plate 27. And a coupling member 25c for fixing the elastic body 25a to the groove member 26a. An upper surface 27b of the device installation plate 27 is mounted on the upper surface of the elastic body 25a. It is supposed to be placed. The elastic body 25a may be a resin or a spring in addition to rubber.
As shown in FIGS. 2 and 5, the device installation plate 27 is supported at a plurality of locations by the vibration isolation devices 25 and 25.
Further, engine mounting tables 28 and 29 are installed on the upper surface 27 b of the device installation plate 27, and vibration isolation devices 24 and 24 are installed on the engine mounting tables 28 and 29. The vibration isolation devices 24 and 24 support the engine support frame 20 to which the engine 21 and the compressor 22 are fixed.

In the above configuration, vibration energy generated in the engine 21 and the compressor 22 is transmitted to the device installation plate 27 via the vibration isolation devices 24 and 24 and the engine mounting bases 28 and 29, and the device installation plate 27 also vibrates. However, since the device installation plate 27 is supported by the vibration isolation devices 25 and 25, the vibration energy transmitted to the device installation plate 27 by the vibration isolation devices 25 and 25 is reduced (absorption). can do. Thereby, the vibration of the apparatus installation board 27 can be reduced.
And by reducing vibration energy with the vibration isolator 25 * 25, the vibration energy transmitted to the base 26 will be reduced, and the vibration of the base 26 can be reduced.
Further, in the above configuration, the device installation plate 27 is not directly fixed to the columns 44 and 46 and the outer plate 49, so that vibration energy due to vibration of the device installation plate 27 is applied to the columns 44 and 46. Also, it is not transmitted directly to the outer plate 49. And according to this, the vibration energy transmitted to the top plate 3 through the support columns 44 and 46 and the outer plate 49 can be reduced, and the vibration of the top plate 3 can also be reduced.
As described above, it becomes possible to reduce the vibration of the device installation plate 27, the floor 26, the columns 44 and 46, and the outer plate 49, and reduce the noise level generated due to the vibration of these vibrations. it can.

As shown in FIGS. 4 and 5, the device installation plate 27 has an upper surface 27b that forms a horizontal surface, and a side surface 27c that is formed by bending an end surface of the upper surface 27b downward, and the bottom surface is opened. It is a box type.
In FIG. 4, an installation table 55 is provided on the left side of the device installation plate 27, and the height of the upper surface 55 a of the installation table 55 is substantially the same as the height of the upper surface 27 b of the device installation plate 27. Further, the depth width of the installation base 55 is substantially the same as that of the base floor 26. In the case where the installation base 55 is not provided, the device installation plate 27 is extended by the width of the installation base 55.

As shown in FIGS. 2, 4, and 5, the periphery of the side surface 27 c of the device installation plate 27 is surrounded by an annular elastic member 37. A gap that communicates the space and a space 38 below the device installation plate 27 (a space 38 formed between the device installation plate 27 and the floor 26) is closed. That is, the elastic member 37 is sandwiched between the outer plate 49 and the vertical side surface 53 b of the installation base 55 and the side surface 27 c of the device installation plate 27.
As described above, the space 38 below the device installation plate 27 is divided from the space above the device installation plate 27.

  And according to the above structure, the airtightness of the engine compartment 5 is maintained by the elastic member 37, that is, noise leaking downward from the device installation plate 27 can be blocked by the elastic member 37, The noise level can be reduced.

The front view shown about the structure of the outdoor unit of the engine heat pump concerning this invention. The figure shown about a structure in an engine compartment. The perspective view shown about the support structure of the lower board of a top plate. The perspective view shown about the structure of a top plate and an apparatus installation board. The perspective view shown about the support structure of an apparatus installation board. The front view shown about the structure of the outdoor unit of the conventional engine heat pump.

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Housing | casing 3 Top plate 4 Heat exchange chamber 5 Engine room 21 Engine 22 Compressor 26 Platform 27 Device installation plate 31 Upper plate 32 Lower plate 33 Ventilation passage 35 Anti-vibration device 51 Support member 52 Support member

Claims (4)

An engine heat pump outdoor unit configured to divide the internal space of the housing into two upper and lower spaces with a top plate, the upper space as a heat exchange chamber, and the lower space as an engine chamber,
The top plate is composed of an upper plate in which a device in the heat exchange chamber is installed and a lower plate disposed below the upper plate, and is configured to be doubled up and down, and the space of the upper and lower plates is configured as a ventilation passage An outdoor unit of an engine heat pump, wherein the lower plate is supported by a support member of the lower plate via a vibration isolator.   The lower plate is surrounded by an elastic member, and the elastic member closes a gap communicating the space in the engine room and the space in the ventilation passage. The outdoor unit of the engine heat pump according to claim 1. An engine heat pump outdoor unit configured to divide the internal space of the housing into two upper and lower spaces with a top plate, the upper space as a heat exchange chamber, and the lower space as an engine chamber,
An outdoor unit for an engine heat pump, in which a vibration isolating device is provided on a base floor constituting the bottom surface of the engine chamber, and a device installation plate for installing an engine is supported by the vibration isolating device.   The periphery of the device installation plate is surrounded by an elastic member, and the elastic member closes a gap communicating the space in the engine room and the space below the device installation plate. The outdoor unit of the engine heat pump according to claim 3.

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