JP2006125699A - Outdoor unit for air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an outdoor unit for an air conditioner efficiently damping vibration of a compressor by a comparatively simple and inexpensive piping structure, and at the same time, capable of improving space saving, and even productivity in a mass production line. <P>SOLUTION: The outdoor unit for the air conditioner is provided with a refrigerating cycle connecting each of the compressor 5, a four-way selector valve 6, an outdoor heat exchanger 7, and a throttling mechanism 22 by piping, a casing housing them, and a fixture 12 comprising a vibration proofing elastic material fixing a total of three portions or more which are two portions of a discharge piping 1 and a suction piping 2 respectively connected between the compressor 5 and the four-way selector valve 6, and at least one portion of a connection side piping 3 connected between the four-way selector valve 6 and a connection valve 8 for indoor unit connection, or a heat exchanger side piping 4 between the four-way selector valve 6 and the outdoor heat exchanger 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an outdoor unit of an air conditioner having a compressor, a four-way switching valve, an outdoor heat exchanger, and a throttle mechanism constituting a refrigeration cycle.

  As shown in FIG. 1, which is a general refrigeration cycle configuration, a conventional outdoor unit of an air conditioner includes a four-way switching valve 6, and a discharge pipe 1, a suction pipe 2 connected to the four-way switching valve 6, The four pipes of the valve connection side pipe 3 and the heat exchanger side pipe 4 are generally independent of each other.

  On the other hand, conventionally, in order to firmly and securely fix two pipes, for example, a pipe fixture made of a vibration-proof elastic material having a through hole for inserting two pipes is used (for example, a patent) Reference 1).

  Moreover, in order to attenuate the vibration energy of piping, conventionally, for example, a rubber weight having a through hole into which piping is inserted is used to fix a plurality of piping. (For example, refer to Patent Document 2).

Japanese Utility Model Publication No. 5-8317 (paragraphs 0007 to 0009, FIG. 1) Japanese Patent Laid-Open No. 6-17973 (paragraphs 0014 to 0015, FIGS. 1 and 7)

  As shown in FIG. 1, since the discharge pipe 1 and the suction pipe 2 connected to the compressor 5 are both connected to the four-way switching valve 6, the vibration when the compressor 5 is operated causes the discharge pipe 1 and The air is transferred from the suction pipe 2 through the four-way switching valve 6 to the outdoor heat exchanger 7 and the connection valve 8 with the indoor unit 16. Therefore, if pipe vibration becomes a problem, a vibration isolating material is pasted on the four pipes of the discharge pipe 1, the suction pipe 2, the valve connection side pipe 3, and the heat exchanger side pipe 4 connected to the four-way switching valve 6. In particular, the discharge pipe 1 and the suction pipe 2 that are directly connected to the compressor 5 that is a vibration generation source transmit a large amount of vibration, so that the amount of the vibration-proofing material tends to increase. There was a problem of high costs.

  In addition, even when the four pipes of the discharge pipe 1, the suction pipe 2, the valve connection side pipe 3, and the heat exchanger side pipe 4 connected to the four-way switching valve 6 vibrate, the adjacent pipes come into contact with each other, and the hit sound It is necessary to take measures such as sticking a foaming material or the like to the contact point or increasing the distance between the pipes so that the four-way switching valve 6, the throttle mechanism 22, the discharge pipe 1, There is a problem that hinders cost increase and space saving of the pipe assembly 10 including the suction pipe 2, the valve connection side pipe 3, and the heat exchanger side pipes 4, 23, and 24.

  Further, when the outdoor unit 15 is mass-produced, the discharge pipe 1, the suction pipe 2, the valve connection side pipe 3, and the heat exchanger side pipe 4 connected to the four-way switching valve 6 connected to the four-way switching valve 6 are used. Since the two pipes are independent, they are easily deformed, and the process of correcting the shape occurs during assembly on the mass production line, resulting in poor productivity, especially when the amount of anti-vibration material attached is large In this case, when the pipe assembly 10 is taken out from the production storage box, the vibration isolating material adheres to the storage box or another pipe assembly 10, so that the deformation amount of the pipe is increased. There was a problem that.

  Further, for example, a pipe fixture made of an anti-vibration elastic material disclosed in Patent Document 1 and a discharge pipe 1 directly connected to the compressor 5 that is the vibration generation source shown in FIG. When the piping 2 is fixed and the discharge piping 1 and the suction piping 2 vibrate individually, the vibration energy is converted into the elastic deformation energy of the fixture, so that the vibration damping effect can be obtained. If the pipe 1, the suction pipe 2 and the fixture vibrate simultaneously, the fixture will not be elastically deformed, so a damping effect cannot be expected. In addition, in the case of an inverter compressor that can freely vary the rotational speed of the compressor, Since the excitation frequency of the compressor 5 also changes, it is necessary to consider not only the case where the discharge pipe 1 and the suction pipe 2 vibrate individually, but also the case where the discharge pipe 1, the suction pipe 2 and the fixture vibrate simultaneously. Anti-vibration measures To there is a problem that in many cases is inadequate.

  In addition, for example, when a pipe vibration energy is to be attenuated using a fixture having a through hole disclosed in Patent Document 2, the vibration damping effect due to elastic deformation at a portion between a plurality of pipes to be fixed is dominant. For other parts, it is not necessary to dampen the vibration, so increasing the amount of elastic material used for the fixture and expanding the piping structure space, and more than three When fixing this pipe, there is a problem that the influence of the above-mentioned problems becomes large.

  The present invention has been made to solve the above-described problems, and is capable of efficiently attenuating compressor vibration with a relatively simple and inexpensive piping structure, and at the same time saving space and producing on a mass production line. It aims at obtaining the outdoor unit of the air conditioner which can improve the property.

  An outdoor unit of an air conditioner according to the present invention is an outdoor unit of an air conditioner including a compressor, a four-way switching valve, an outdoor heat exchanger, a refrigeration cycle in which a throttle mechanism is connected to each other, and a housing for storing them. Among the pipes, at least one of two parts of the discharge pipe and the suction pipe respectively connected between the compressor and the four-way switching valve, and other pipes, the casing, and the constituent members constituting the outdoor unit It is provided with fixing means made of a vibration-proof elastic material that fixes a total of three or more places.

  The outdoor unit of the air conditioner of the present invention is configured such that, among the pipes, the discharge pipe and the suction pipe respectively connected between the compressor and the four-way switching valve and the other pipes, the casing, and the outdoor unit Since the fixing means which consists of a vibration-proof elastic material which fixes a total of 3 or more places with at least 1 place among members is provided, the vibration of a compressor can be attenuated efficiently.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described with reference to FIG. 1 and FIG.
FIG. 1 is a configuration diagram of a refrigeration cycle of a general air conditioner, and FIG. 2 is a pipe fixing diagram of an outdoor unit of the air conditioner showing Embodiment 1 of the present invention.
In FIG. 1, an outdoor unit 15 of an air conditioner is provided with a compressor 5, a four-way switching valve 6, a throttle mechanism 22, and an outdoor heat exchanger 7 constituting a refrigeration cycle in a casing (not shown). An indoor unit 16 having an indoor heat exchanger 17 is connected to connection valves 8 and 9 of the unit 15 via connection pipes 20 and 21 via connection valves 18 and 19.

  In the outdoor unit 15, the discharge pipe 1 from the discharge port of the compressor 5 to the four-way switching valve 6, the suction pipe 2 from the suction port of the compressor 5 to the four-way switching valve 6, and the four-way switching valve 6 to the indoor unit 16 Valve connection side pipe 3 to connection valve 8 for connecting outdoor unit 15, heat exchanger side pipe 4 from four-way switching valve 6 to outdoor heat exchanger 7, pipe 23 to connection valve 9 and throttle mechanism 22, throttle mechanism 22 and the piping 24 to the outdoor heat exchanger 7 are connected to each other.

  In FIG. 2, a fixture 11 made of a vibration-proof elastic material such as rubber is provided at three locations of the discharge pipe 1, the suction pipe 2, and the base plate 25 that forms the casing of the outdoor unit shown in FIG. 1. And fixing parts 13 and 14 are used. The fixing component 13 has a band shape for fixing the discharge pipe 1, the suction pipe 2 and the fixture 11. The fixing component 14 is a screw that fixes the fixture 11 and the base plate 25 of the outdoor unit.

  Further, the through hole for inserting the pipe is not provided in the fixture 11, and the contact surfaces of the fixing portions 11 a and 11 b between the fixing object 11 such as the discharge pipe 1 and the suction pipe 2 are the outer peripheral surface of the fixture 11. It is provided above.

  Next, the behavior when the compressor 5 is operated and vibration is generated in the outdoor unit 15 configured as described above will be described. The vibration of the compressor 5 is first transmitted to the discharge pipe 1 and the suction pipe 2, but the shapes of the discharge pipe 1 and the base plate 25 of the outdoor unit and the shapes of the suction pipe 2 and the base plate 25 of the outdoor unit are different. Each resonance frequency and resonance mode are different. In general, the discharge pipe 1 and the suction pipe 2 also often have different pipe shapes, pipe diameters, and pipe thicknesses, and the resonance frequency and resonance mode of the discharge pipe 1 and the suction pipe 2 are also different. Therefore, when the discharge pipe 1 resonates, the suction pipe 2 and the base plate 25 of the outdoor unit do not resonate, and the vibration energy of the discharge pipe is converted into the elastic deformation energy of the fixture 11 to effectively attenuate the vibration. Obtainable. Conversely, even when the suction pipe 2 resonates, the discharge pipe 1 and the base plate 25 of the outdoor unit do not resonate and can similarly effectively attenuate vibrations.

In addition, since three or more places are fixed by the fixing tool 11 made of the vibration-proof elastic material, the frequency at which vibration is generated such that the fixing tool 11 is not elastically deformed is much higher than that at two places.
For example, when the spring constant of the discharge pipe 1 is 1K, the spring constant of the suction pipe 2 is 2K, and the spring constant of the fixing position of the base plate 25 is 6K, only two places of the discharge pipe 1 and the suction pipe 2 are fixed The spring constant is 1K + 2K = 3K, and the spring constant when the three locations of the discharge pipe 1, the suction pipe 2 and the base plate 25 are fixed is 1K + 2K + 6K = 9K. Accordingly, the frequency at which the fixture 11 resonates without being elastically deformed when fixed at three locations is √ (9K / 3K) = √3 times that when fixed at two locations. As described above, by fixing the three locations including the discharge pipe 1 and the suction pipe 2, it is possible to shift the primary vibration which is the main vibration component of the compressor 5 and the resonance frequency of the fixture 11. The vibration problem can be reduced even in the case of an inverter compressor that can be operated by freely varying the rotation speed.

  In addition, since the discharge pipe 1 and the suction pipe 2 are fixed by the fixture 11, the relative positions of the two are not easily changed, and the pipe contact prevention measure in consideration of the variation in the pipe shape and the displacement caused by the pipe vibration, which has been necessary conventionally. In other words, it is not necessary to attach a foaming material or the like to the place of contact or increase the distance between the pipes.

  In addition, since there is a vibration suppressing effect in the fixture 11 made of a vibration-proof elastic material such as rubber, it is possible to reduce the amount of vibration-proof material having a strong adhesive force that has been conventionally used for vibration-proof treatment.

  Further, the through hole for inserting the pipe is not provided in the fixture 11, and the contact surfaces of the fixing portions 11 a and 11 b between the fixing object 11 such as the discharge pipe 1 and the suction pipe 2 are the outer peripheral surface of the fixture 11. Since it is provided above, the amount of elastic material used for the fixture 11 and the piping structure space can be reduced.

  In the present embodiment, the fixing parts 13 and 14 are used. However, in the present invention, as long as the force generated in the discharge pipe 1 or the suction pipe 2 can elastically deform the fixture 11, Such a fixing method may be used.

Moreover, in this Embodiment, the fixing tool 11 and the fixing | fixed component 13 are connected to the two places of the discharge piping 1 and the suction piping 2 connected between the compressor 5 and the four-way switching valve 6, and the base plate 25 of the housing | casing. 14, except for the two places of the discharge pipe 1 and the suction pipe 2, there are other pipes such as a valve connection side pipe 3, a heat exchanger side pipe 4, pipes 23 and 24, and components of the housing. You may fix a total of three or more places, such as a certain top plate, an outer shell board, etc., and at least one place among the comparatively highly rigid parts which comprise the outdoor unit 15.
When the number of places exceeds three places as compared with the case of fixing at three places, the frequency at which the vibration that causes the fixture 11 not to be elastically deformed further increases.
In the comparative example of the resonance frequency between the two fixing points and the three fixing points described above, the resonance frequency is tripled. However, when the fixing is performed on the body plate in the above example, the spring constant of the body plate is set to 3K. Then, the spring constant is 1K + 2K + 6K + 3K = 12K, and the frequency at which the fixture 11 resonates without elastic deformation is √ (12K / 3K) = 2 times compared to the case where the fixture 11 is fixed at two locations.

Embodiment 2. FIG.
In the first embodiment described above, the fixture 11 made of the vibration-proof elastic material is provided at three locations of the relatively rigid parts constituting the outdoor unit 15 such as the discharge pipe 1, the suction pipe 2 and the base plate 25 of the outdoor unit 15. In the second embodiment, three or more places of the discharge pipe 1, the suction pipe 2, and other pipes connected to the four-way switching valve 6 are fixed. Will be described with reference to FIGS. 1 and 3 shown in the first embodiment. FIG. 3 is a piping fixing diagram of an outdoor unit of an air conditioner showing Embodiment 2 of the present invention.

  3, the discharge pipe 1, the suction pipe 2, the valve connection side pipe 3 from the four-way switching valve 6 to the connection valve 8 to the indoor unit 16, or the four-way switching valve 6 to the outdoor heat exchanger 7 shown in FIG. 1. The three parts of the heat exchanger side pipe 4 up to the above are fixed using the fixture 12 and the fixing component 13 made of the vibration-proof elastic material. The fixing part 13 has a band shape for fixing the discharge pipe 1 and the suction pipe 2 and the valve connection side pipe 3 or the heat exchanger side pipe 4 and the fixture 11.

In the outdoor unit 15 configured as described above, as in the first embodiment, when the compressor 5 is operated and vibration is generated, the vibration of the compressor 5 is first transmitted to the discharge pipe 1 and the suction pipe 2. But,
The discharge pipe 1, the suction pipe 2, the valve connection side pipe 3, and the heat exchanger side pipe 4 often have different pipe shapes, pipe diameters, and pipe wall thicknesses, and the resonance frequencies and resonance modes of these pipes are also different. Therefore, when the discharge pipe 1 resonates, the valve connection side pipe 3 or the heat exchanger side pipe 4 does not resonate, and the vibration energy of the discharge pipe is converted into the elastic deformation energy of the fixture 12 to effectively attenuate the vibration. Can be obtained. Conversely, when the suction pipe 2 resonates, vibration attenuation can be obtained effectively.

Further, since the three places are fixed by the fixing tool 11 made of the vibration-proof elastic material, the frequency at which vibration is generated such that the fixing tool 11 is not elastically deformed is much higher than the fixing at the two places.
For example, if the spring constant of the discharge pipe 1 is 1K, the spring constant of the suction pipe 2 is 2K, and the spring constant of the fixed portion of the heat exchanger side pipe 4 is 3K, only the two places of the discharge pipe 1 and the suction pipe 2 are connected. The spring constant when fixed is 1K + 2K = 3K, and the spring constant when three locations of the discharge pipe 1, the suction pipe 2, and the heat exchanger side pipe 4 are fixed is 1K + 2K + 3K = 6K. Accordingly, the frequency at which the fixing tool 12 resonates without being elastically deformed when fixing at three locations is √ (6K / 3K) = √2 times that when fixing at two locations. As described above, by fixing the three locations including the discharge pipe 1 and the suction pipe 2, it is possible to shift the primary vibration which is the main vibration component of the compressor 5 and the resonance frequency of the fixture 11. The vibration problem can be reduced even in the case of an inverter compressor that can be operated by freely varying the rotation speed.

In FIG. 1, four-way switching valve 6, discharge pipe 1, suction pipe 2, valve connection side pipe 3, heat exchanger side pipe 4, connection valve 9 and pipe 23 to throttle mechanism 22, throttle mechanism 22 and outdoor heat. The pipe 24 up to the exchanger 7 is assembled in advance as a pipe assembly 10 and delivered in a box for mass production assembly of the outdoor unit 15, but the discharge pipe 1, the suction pipe 2, and the valve connection Since the three parts of the side pipe 3 or the heat exchanger side pipe 4 are fixed by the fixture 12 and the fixing component 13, the productivity in the assembly line is improved.
Further, when the outdoor unit 15 is assembled using the pipe assembly 10, the amount of deformation of the pipe assembly 10 can be reduced by reducing the amount of use of a vibration isolating material that is fixed by the fixture 12 and has strong adhesive force. Can be small.

  In addition, since the contact surfaces of the fixing parts 12a, 12b, 12c between the fixing object 12 such as the discharge pipe 1 and the suction pipe 2 and the fixing tool 12 are provided on the outer peripheral surface of the fixing tool 12, they are used for the fixing tool 12. The amount of elastic material used and the piping structure space can be reduced.

  When the compressor 5 is operated and vibration is generated in the outdoor unit 15 configured as described above, as in the first embodiment, the force generated in the discharge pipe 1 or the suction pipe 2 causes the fixture 12 to be elastic. Any fixing method may be used as long as it can be deformed, and the same vibration damping effect as in the first embodiment can be obtained.

Moreover, in this Embodiment, two places, the discharge piping 1 and the suction piping 2 connected between the compressor 5 and the four-way switching valve 6, and one location of the valve connection side piping 3 or the heat exchanger side piping 4 are provided. Although fixed at a total of three places, other than the two places of the discharge pipe 1 and the suction pipe 2, it may be fixed at a total of four places including the valve connection side pipe 3 and the heat exchanger side pipe 4.
When the number of places exceeds three as compared with the fixing at the three places, the frequency at which vibrations such that the fixture 12 is not elastically deformed can be further increased.

It is a block diagram of the refrigerating cycle of a general air conditioner. It is a perspective view of the fixture in the outdoor unit of the air conditioner which concerns on Embodiment 1 of this invention. It is a perspective view of the fixture in the outdoor unit of the air conditioner which concerns on Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge piping, 2 Intake piping, 3 Valve connection side piping, 4 Heat exchanger side piping, 5 Compressor, 6 Four way switching valve, 7 Outdoor heat exchanger, 10 Piping assembly, 11 Fixing tool, 11a Fixing part, 12 Fixing tool, 12a fixing part, 13 fixing part, 14 fixing part, 15 outdoor unit, 16 indoor unit, 18 connection valve, 22 throttle mechanism, 23 piping, 24 piping, 25 base plate.

Claims (4)

In an outdoor unit of an air conditioner equipped with a compressor, a four-way switching valve, an outdoor heat exchanger, a refrigeration cycle in which a throttle mechanism is piped, and a housing for storing them,
Among the pipes, at least one of the two parts of the discharge pipe and the suction pipe connected between the compressor and the four-way switching valve, and the other pipes, the casing, and the constituent members constituting the outdoor unit An outdoor unit for an air conditioner comprising a fixing means made of a vibration-proof elastic material for fixing a total of three or more locations. In an outdoor unit of an air conditioner equipped with a compressor, a four-way switching valve, an outdoor heat exchanger, a refrigeration cycle in which a throttle mechanism is piped, and a housing for storing them,
Two locations of a discharge pipe and a suction pipe respectively connected between the compressor and the four-way switching valve, a valve connection side pipe connected between the four-way switching valve and a connection valve for connecting an indoor unit, and the four-way switching valve An outdoor unit for an air conditioner, comprising fixing means made of a vibration-proof elastic material for fixing a total of at least three of the pipes on the heat exchanger side between the heat exchanger and the outdoor heat exchanger. In an outdoor unit of an air conditioner equipped with a compressor, a four-way switching valve, an outdoor heat exchanger, a refrigeration cycle in which a throttle mechanism is piped, and a housing for storing them,
At least the four-way switching valve, a discharge pipe and a suction pipe respectively connected between the compressor and the four-way switching valve, a valve connection side pipe connected between the four-way switching valve and a connection valve for connecting an indoor unit, and the four-way The heat exchanger side pipe between the switching valve and the outdoor heat exchanger is pre-assembled as a pipe assembly, and two of the discharge pipe and the suction pipe respectively connected between the compressor of the pipe assembly and the four-way switching valve. And at least one of the valve connection side piping connected between the four-way switching valve and the connection valve for connecting the indoor unit and the heat exchanger side piping between the four-way switching valve and the outdoor heat exchanger. An outdoor unit for an air conditioner, comprising fixing means made of a vibration-proof elastic material that fixes three or more locations. The outdoor unit for an air conditioner according to any one of claims 1 to 3, wherein a fixing portion is provided on an outer peripheral surface of the fixing means.

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