JPH071105B2 - Anti-vibration device for air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vibration isolator for an air conditioner, and in particular,
The present invention relates to a vibration isolator for an air conditioner that prevents vibrations generated by a compressor as a vibration source from being transmitted to the outdoor unit body and the outdoor heat exchanger.

[Prior Art] A compressor in an outdoor unit of an air conditioner makes a refrigerant have a high pressure, which causes vibration. Especially, large vibrations at the start and stop of operation are caused by refrigerant pipes connected to the compressor. May be damaged. As a conventional vibration control device for an air conditioner that prevents this vibration, a technique disclosed in Japanese Utility Model Laid-Open No. 64-15779 can be cited.

FIG. 7 is a partial schematic view showing a conventional vibration isolator for an air conditioner.

In the figure, (1) is a compressor disposed inside the outdoor unit main body, and legs (2) are attached to the bottom of the compressor.
(3) is a substrate on which the compressor (1) is placed, and the support pin (4) is fixed only in this place. (5) is a lower anti-vibration rubber interposed between the leg portion (2) and the substrate (3). Reference numeral (21) is a projecting pin provided so as to project at the center of the upper end of the compressor (1), and is a support substrate (2
2) is penetrated. Reference numeral (23) is an upper vibration isolator attached to the support substrate (22) and is made of an elastic material such as rubber. (24) is a protection pipe that penetrates a refrigerant pipe of a four-way valve (8) connected to a discharge pipe (6) drawn from the compressor (1) and a suction pipe (7) to the compressor (1). It is made of rubber and both are provided on the support substrate (22).

Next, the operation of the conventional vibration isolator for an air conditioner configured as described above will be described.

The compressor (1) is connected to the substrate (3) through the lower vibration isolation rubber (5).
Since it is fixed above, the vertical vibration of the compressor (1) is damped. Moreover, since the upper part of the compressor (1) is fixed to the support substrate (22) through the protruding pin (21) and the upper vibration isolator (23), the upper part of the compressor (1) is prevented from rolling. To be done.
At the same time, the four-way valve (8) connected to the attached discharge pipe (6) and suction pipe (7) is also supported in a vibration-proof state by the support substrate (22) via the vibration-proof rubber (24). Therefore, vibrations of the discharge pipe (6), the suction pipe (7) and the four-way valve (8) are also prevented.

Next, another conventional example disclosed in the same publication will be described with reference to FIG.

FIG. 8 is a partial schematic view showing a vibration isolator for an air conditioner according to another conventional example.

In the figure, only parts different from the above-mentioned conventional example will be described.
(6) and (7) are a discharge pipe and a suction pipe connected between the compressor (1) and the four-way valve (8), both of which form a required loop in the path. Since the four-way valve (8) is designed to damp the vibration of the compressor (1) by the discharge pipe (6) and the suction pipe (7) having a loop, it is elastically supported by the vibration proof rubber (24). I haven't.

Similar to the above-mentioned conventional example, the operation of this conventional example is performed by the lower vibration isolating rubber (5) at the lower part of the compressor (1) to the substrate (3).
The transmission to the upper part is prevented, and the upper vibration isolator (23) prevents the upper part from rolling. The discharge pipe (6)
Since the required loop is formed in the suction pipe (7), it is possible to prevent the discharge pipe (6) and the suction pipe (7) from vibrating or breaking due to the vibration of the compressor (1).
The vibration of the four-way valve (8) is dampened. That is, anti-vibration rubber (2
Vibration is damped by a buffer shape such as a loop formed in the discharge pipe (6) and the suction pipe (7) instead of 4).

[Problems to be Solved by the Invention] Since the vibration isolator of the conventional air conditioner is configured as described above, the vibration of the compressor (1) is temporarily attenuated,
With respect to the vibration of the discharge pipe (6) and the suction pipe (7) attached thereto, a sufficient damping action cannot be obtained. Therefore, the four-way valve (8) connected thereto may vibrate or transmit the vibration to the support. Whether the four-way valve (8) is elastically supported by the anti-vibration rubber (24),
Alternatively, since it is supported only by the looped discharge pipe (6) and suction pipe (7), the four-way valve (8) itself has a plurality of resonance frequencies, and the rotation speed of the compressor (1). In a controllable variable capacity air conditioner, a number of resonance frequencies coincide with each other, which causes a problem in noise due to vibration and stress in piping. Further, the vibration is transmitted to the outdoor heat exchanger or the like connected by the refrigerant pipe from the four-way valve (8) to cause noise or the vibration is transmitted to the outdoor unit body. It should be noted that it is not preferable to reduce the diameter of the pipe in order to damp this vibration, because the pressure loss in the pipe increases and the performance deteriorates.

Therefore, the present invention reduces the resonance of the four-way valve, attenuates the vibration of the refrigerant pipe connected to the compressor and the four-way valve without lowering the cooling and heating capacity, and reduces the vibration of the outdoor heat exchanger and the outdoor unit main body. An object of the present invention is to provide a vibration damping device for an air conditioner that can reduce noise.

[Means for Solving the Problems] A vibration isolator for an air conditioner according to the present invention elastically supports a compressor on a substrate of an outdoor unit main body with a vibration isolator, and mounts a four-way valve on an outer shell of the compressor. Is fixed inelastically by means of a tool, and is connected to at least one of the connection part from the four-way valve to the outdoor heat exchanger and the indoor side, and is reciprocated in the axial direction on the outer periphery of the body of the compressor. A refrigerant pipe surrounded by a pipe is formed.

[Operation] In the present invention, since the four-way valve is inelastically fixed to the compressor, the resonance frequency for supporting the four-way valve is the same as the resonance frequency for supporting the compressor. Therefore, the number of resonance frequencies is reduced as compared with the case where the four-way valve is elastically supported. Further, since the refrigerant pipe is formed in a shape that easily bends in the circumferential direction of the compressor, the transmission of vibration in the circumferential direction of the compressor is damped. As a result, the vibration transmitted from the compressor to the outdoor heat exchanger and the outdoor unit main body via the four-way valve and the refrigerant pipe and the noise generated thereby are reduced.

[Embodiment] <First Embodiment> A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a schematic view showing a vibration isolator for an air conditioner according to a first embodiment of the present invention, and FIG. 2 is a plan view showing a specific mode of the vibration isolator for an air conditioner according to the first embodiment of the present invention. 3 and 4 are perspective views of FIG. In the figure, the same reference numerals as those in FIG. 7 and FIG. 8 are the same as or correspond to the conventional constituent parts, and therefore the description thereof will be omitted here.

In the figure, (9) is a four-way valve fixed base that is firmly supported by the compressor (1), and four-way valve (8) is a four-way valve retainer fitting (1
It is inelastically held by the four-way valve fixing fitting (9) according to 0). That is, the compressor (1) and the four-way valve (8) are vibrationally integrated. Further, the discharge pipe (6) and the suction pipe (7) connected between the compressor (1) and the four-way valve (8) also have the same vibration system as the compressor (1) and the four-way valve (8). Has become. (11) is an outdoor heat exchanger, which is connected to the refrigerant pipe (12) from the four-way valve (8). (13) is a stop valve provided on the way to the indoor heat exchanger (not shown), and is connected to the refrigerant pipe (14) from the four-way valve (8). The refrigerant pipe (12) connected to the outdoor heat exchanger (11) and the refrigerant pipe (14) connected to the stop valve (13) are provided on the outer periphery of the body of the compressor (1).
Vibration is transmitted, a wave-shaped bend or a loop-shaped bend for damping the vibration is formed.

Next, the operation of the vibration isolator for the air conditioner of the present embodiment configured as described above will be described.

The four-way valve (8) is inelastically fixed to the four-way valve fixing base (9), so that the four-way valve (8) is connected to the outdoor heat exchanger (11).
The frequency of the vibration transmitted to the refrigerant pipe (12) connected to the refrigerant pipe (14) connected to the stop valve (13) is the same as the frequency of the vibration generated by the compressor (1). For this reason, the elastically fixed four-way valve (8) as in the past
The number of resonance points is reduced as compared with the vibration that occurs, and the rotation speed can be smoothly controlled in the operation of the rotation speed control type variable capacity air conditioner.

In the figure, the refrigerant pipe (12) to the outdoor heat exchanger (11) and the refrigerant pipe (14) to the stop valve (13) are bent in a wavy shape while surrounding the compressor (1) in a circumferential shape. It is shaped like

As a result, when the compressor (1) is a rolling piston type compressor, vibration is generated in the circumferential direction, so that the refrigerant pipe (12) and the refrigerant pipe (14) are bent in the circumferential direction as described above. The vibration is easily absorbed by and the damping effect is high. Therefore, vibration and noise generated from the outdoor heat exchanger (11) or the outdoor unit main body can be suppressed low.

As described above, in the vibration isolator of the air conditioner of the above-described embodiment, the compressor (1) is elastically supported by the lower vibration isolating rubber (5) on the substrate (3) of the outdoor unit body, and the compressor (1) is The four-way valve (8) is inelastically fixed to the outer shell of the four-way valve fixing base (9) and the four-way valve retainer (10), and the four-way valve (8) is connected to the outdoor heat exchanger (11). A refrigerant pipe (12) connected to the stop valve (13) and a refrigerant pipe (14) connected to the stop valve (13) are surrounded by a corrugated pipe that reciprocates in the axial direction around the outer periphery of the body of the compressor (1). It was formed.

Therefore, according to the above-mentioned embodiment, since the four-way valve (8) is inelastically fixed to the compressor (1), the resonance frequency related to the support of the four-way valve (8) does not affect the support of the compressor (1). It becomes the same as the resonance frequency. Therefore, the number of resonance frequencies is reduced as compared with the case where the four-way valve (8) is elastically supported.
Further, by forming the refrigerant pipe (12) and the refrigerant pipe (14) on the outer periphery of the body of the compressor in a buffer shape such as a loop in a circumferential shape, the transmission of vibration of the compressor (1) is attenuated. With these, vibration and noise of the outdoor heat exchanger (11) and the outdoor unit main body can be reduced.

<Second Embodiment> Next, a second embodiment of the present invention will be described with reference to FIGS. 4 and 5.

FIG. 4 is a partial schematic view of a vibration isolator for an air conditioner according to a second embodiment of the present invention, and FIG. 5 is a plan view showing a specific mode of the vibration isolator for an air conditioner according to the second embodiment of the present invention. It is a figure.
In the drawings, the same reference numerals as those in FIGS. 1 to 3 are the same as or correspond to the constituent parts of the first embodiment, and therefore the description thereof will be omitted here.

In the figure, (7) is a suction pipe connected between the compressor (1) and the four-way valve (8), having a larger diameter and shorter length than the suction pipe (7) of the first embodiment. It has rigidity. Since the four-way valve (8) is inelastically fixed to the compressor (1) by this suction pipe (7), the four-way valve fixing base (9) and the four-way valve of the first embodiment are used in the second embodiment. The holding metal fittings (10) are abolished.

In the vibration isolator of the air conditioner of the second embodiment, the four-way valve (8) is inelastically fixed to the compressor (1) via the suction pipe (7) to vibrate the compressor (1). Since it is integrated with the system, the same action and effect as the vibration isolator of the air conditioner of the first embodiment can be expected. In particular, in the second embodiment, the four-way valve fixing base (9) and the four-way valve holding metal fitting (10) of the first embodiment can be eliminated, so that the cost of parts can be reduced.

<Third Embodiment> Further, a third embodiment of the present invention will be described with reference to FIG.

FIG. 6 is a schematic diagram showing a vibration isolator for an air conditioner according to a third embodiment of the present invention. In the drawings, the same reference numerals as those in FIGS. 1 to 3 are the same as or correspond to the constituent parts of the first embodiment, and therefore the description thereof will be omitted here.

In the figure, the refrigerant pipe (12) from the four-way valve (8) to the outdoor heat exchanger (11) was bent in parallel by the branch pipe joint (15) near the four-way valve (8). It is branched into a branch refrigerant pipe (16) and further into a branch refrigerant pipe (17). The branch refrigerant pipe (16) and the branch refrigerant pipe (17) are the outdoor heat exchanger (11).
It is branched according to the shape of the path at the entrance.
Both the branch refrigerant pipe (16) and the branch refrigerant pipe (17) have a smaller diameter than the refrigerant pipe (12).

The vibration isolator of the air conditioner of the third embodiment is a four-way valve (8).
Since a plurality of refrigerant pipes from the outdoor heat exchanger (11) to the outdoor heat exchanger (11) are branched in parallel, the same action and effect as the vibration isolator of the air conditioner of the first embodiment can be expected. In particular, in the third embodiment, since the refrigerant pipes from the four-way valve (8) to the outdoor heat exchanger (11) are branched in a plurality of parallel states, when one refrigerant pipe is simply downsized, In comparison, the pressure loss in the flow of the refrigerant in the refrigerant pipe is reduced. That is, since the flow rate per one is reduced by branching into a plurality, the pressure loss in each refrigerant pipe is reduced. Therefore, even if the diameters of the branch refrigerant pipe (16) and the branch refrigerant pipe (17) are reduced, the pressure loss value can be maintained at the level of the conventional example. Therefore, the diameter of the refrigerant pipe can be reduced without increasing the pressure loss, and thus the transmitted vibration can be attenuated without lowering the heating / cooling performance. As described above, according to the third embodiment, it is possible to further reduce the transmission of the vibration of the compressor (1) to the outdoor heat exchanger (11).

By the way, the compressor (1) of each of the above-mentioned embodiments may be provided with the projecting pin (21) on the upper part and elastically supported by the support substrate (22) through the upper vibration isolator (23) as in the conventional example. Good. However,
The four-way valve (8) needs to be inelastically fixed to the compressor (1).

Further, although the refrigerant pipe (14) connected to the stop valve (13) in each of the above-mentioned embodiments is formed by one, the present invention is not limited to this, and the route is not limited to this. In the same manner as the refrigerant pipe (12) leading to the outdoor heat exchanger (11) of the third embodiment, a plurality of branches may be branched.
In this case, from the compressor (1) to the stop valve (13)
The vibration transmitted to the outdoor unit main body through the mounting portion of can be further attenuated.

[Advantages of the Invention] As described above, in the vibration isolator of the air conditioner of the present invention, the compressor is elastically supported by the vibration isolator on the substrate of the outdoor unit body, and the four-way valve is attached to the outer shell of the compressor. While being directly fixed by a tool, the refrigerant pipe connected from the four-way valve to the connection portion between the outdoor heat exchanger and the indoor side is formed in a shape that is easily bent in the circumferential direction of the compressor. Therefore,
The resonance frequency for supporting the four-way valve is the same as the resonance frequency for supporting the compressor. Therefore, the number of resonance frequencies is reduced as compared with the case where the four-way valve is elastically supported. Further, since the refrigerant pipe is formed around the outer circumference of the body of the compressor in a buffer shape such as a loop, the transmission of vibration of the compressor is damped. With these, vibration transmitted from the compressor to the outdoor heat exchanger and the outdoor unit main body through the four-way valve and the refrigerant pipe can be suppressed, and noise generated due to the vibration can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic view showing a vibration isolator for an air conditioner according to a first embodiment of the present invention, and FIG. 2 is a plan view showing a specific mode of the vibration isolator for an air conditioner according to the first embodiment of the present invention. FIG. 3 is a perspective view of FIG. 2, FIG. 4 is a partial schematic view of a vibration isolator of an air conditioner according to a second embodiment of the present invention, and FIG. 5 is air according to a second embodiment of the present invention. FIG. 6 is a plan view showing a concrete mode of the vibration isolator of the air conditioner, FIG. 6 is a schematic view showing the vibration isolator of the air conditioner of the third embodiment of the present invention, and FIG. FIG. 8 is a partial schematic diagram showing a vibration damping device, and FIG. 8 is a partial schematic diagram showing a vibration damping device for an air conditioner according to another conventional example. In the figure, 1: compressor, 3: substrate 5: bottom anti-vibration rubber, 8: four-way valve 9: four-way valve fixing base, 10: four-way valve retainer 11: outdoor heat exchanger 12, 14: refrigerant pipe 13: It is a stop valve. In the drawings, the same reference numerals and symbols indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A compressor elastically supported on a substrate of an outdoor unit main body via a vibration isolator, a four-way valve directly fixed to an outer shell of the compressor via a fixture, and a four-way valve A refrigerant pipe, which is connected to at least one of the outdoor heat exchanger and the connection portion to the indoor side and is surrounded by a wavy pipe that reciprocates in the axial direction, is provided on the outer periphery of the body of the compressor. Anti-vibration device for air conditioners.