JPH04109090A - Closed type compressor - Google Patents

Abstract

PURPOSE:To reduce vibration and noise without aggravating manufacturing and assembling performance by connecting compressor elements to each other by a connecting member, in a position spaced by the fixed distance from a fitting frame. CONSTITUTION:A closed type compressor is provided with a fitting frame 12 laid horizontally in a vertical type closed case 11. A pair of vertical type compressor elements 13a, 13b are supported parallel on this fitting frame 12. The compressor elements 13a, 13b are respectively provided with motor-driven element parts 14a, 14b at the lower parts and compression element parts 15a, 15b at the upper parts. In this case, the compressor elements 13a, 13b are connected to each other by a connecting member 19, in a position spaced by the fixed distance L from the fitting frame 12. The compressor elements 13a, 13b are thereby made into rigid structure fixed at plural places including the support part by the fitting frame 12, and also vibration is absorbed mutually between the compressor elements 13a, 13b.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a hermetic compressor that incorporates a plurality of compressor elements in one hermetic case, and particularly relates to a This article relates to a hermetic compressor with improved strength, vibration characteristics, etc.

(Prior Art) Conventionally, as a hermetic compressor applied to a refrigeration cycle device, a plurality of compressor elements (compression mechanism) are provided in one hermetic case, and the number of compressor elements to be driven is varied. It is known that the output of the refrigeration cycle can be adjusted using the following methods.

FIG. 5 shows a conventional example of such a hermetic compressor. A mounting frame 2 is installed horizontally within a vertical sealed case 1. The mounting frame 2 is made of a rod-shaped body such as an angle member or a plate material, for example, a pair of rod-shaped bodies are arranged in parallel at a predetermined interval, and each end is fixed to the sealed case 1 by welding or the like. In each of these installations, a pair of vertical compressor elements 3a and 3b are arranged in parallel between the frames 2, and fixedly supported using fasteners such as bolts and nuts. Note that 4a and 4b are discharge pipes of the respective compressor elements 3a and 3b, which are led out from the side wall of the sealed case 1.

(Problems to be Solved by the Invention) Incidentally, in a hermetic compressor, it is desirable to set the mounting frame 2 to a small amount in consideration of ease of assembling the compressor elements 3a, 3b, etc.

That is, as shown in FIG. 5, it is common practice to arrange the mounting frame 2 only at one location in the vertical direction within the sealed case 1, thereby simplifying the internal structure of the sealed case.

However, in such a structure, each compressor element 3a, 3b has only one holding part by the mounting frame 2, so each compressor element 3a, 3b is held at only one place during operation.
Vibration tends to become large, such as vibration occurring in the unsupported part of the
Excessive stress will be applied to b, and in the worst case, there is a risk that it will break.

Therefore, in order to prevent such a situation, conventional measures have been taken such as increasing the thickness of the mounting frame 2 or reinforcing the mounting frame 2 with reinforcing material, but these measures have a large structure, There is a drawback that it becomes complicated and deteriorates manufacturability and assemblability.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a hermetic compressor that can reduce vibrations, noise, etc. without deteriorating manufacturability or assemblability.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a hermetic compressor in which a mounting frame is constructed in a sealed case, and a plurality of compressor elements are fixedly supported in parallel on the mounting frame. They are characterized in that they are connected to each other by a connecting member at a position spaced apart from the mounting frame by a certain distance.

(Function) According to the present invention, since the compressor elements are connected to each other by the connecting member, it is possible to reduce vibrations by absorbing vibrations between the compressor elements. Therefore, it is possible to reduce the vibration of the compressor element without increasing the thickness of the mounting frame or using reinforcing materials, so the structure does not become larger or more complex, which worsens manufacturability and ease of assembly. Vibration, noise, etc. can be reduced without causing any damage. Note that the position of the connecting member that connects the compressor elements to each other is such that reliable vibration absorption is possible by separating the connecting member from the mounting frame by a certain distance.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the hermetic compressor of the present invention. This hermetic compressor has a mounting frame 12 installed horizontally within a vertical hermetic case 11. Mounting frame 1
Reference numeral 2 is made of a rod-like member such as an angle member or a plate member. For example, a pair of rod-like members are arranged in parallel at a predetermined interval, and both ends of each are fixed to the closed case 11 by welding or the like.

A pair of vertical compressors 13a and 13b are arranged in parallel between each of the mounting frames 12, and are fixedly supported using fasteners such as bolts and nuts.

Each of the compressor elements 13a and 13b is, for example, scroll-shaped, and has electric element parts 14a and 14b at the lower part and compression element parts 15a and 15b at the upper part, and each of the compression element parts 15a and 15b is supported by the mounting frame 12. has been done. A muffler 16 is provided at the upper end of each compression element portion 15a, 15b.
a and 16b are provided, and a discharge pipe 17 for discharging refrigerant gas is attached to these portions. Note that the suction pipe 18 for sucking refrigerant gas is provided, for example, at a mid-height position of the side wall of the sealed case 11.

In this, compressor element 13a.

13b are connected to each other by a connecting member 19 at a position spaced apart from the mounting frame 12 by a certain distance. That is, the connecting member 19 is, for example, plate-shaped,
The muffler 1 has both ends of each compressor element 13a, 13b.
It is fixed to the portions 6a and 16b by welding or the like.

According to the configuration of the first embodiment, since the compressor elements 13a and 13b are connected to each other by the connecting member 19 at a position spaced apart from the mounting frame 12 by a certain distance, both compressor elements 13a , 13b
However, together with the support portion provided by the mounting frame 12, the compressor element 13a has a rigid structure fixed at a plurality of locations.

Vibration can be reduced by absorbing vibration between the parts 13b.

Therefore, there is no need to increase the thickness of the mounting frame 12 or use reinforcing materials, and the compressor
Since the vibrations b can be reduced, the structure does not become particularly large or complicated, and vibrations, noise, etc. can be reduced without deteriorating manufacturability or assemblability. In the case of the above-mentioned configuration in which the discharge pipe 17 is taken out of the case, the stress applied to the discharge pipe 17 due to the vibration of the compressor elements 13a and 13b is reduced, and the reliability of the compressor can be greatly improved.

FIG. 2 shows the compressor elements 13a, 13 when the distance between the connecting member 19 that connects the compressor elements 13a, 13b and the mounting frame 12 is varied.
3b shows the retention strength characteristics. As shown in FIG. 2, it was confirmed that the holding strength of the compressor elements 13a, 13b increases as the separation distance increases. In other words, the vibrations of the compressor elements 13a and 13b are so-called pendulum-linked vibrations, and this pendulum movement tends to increase in a quadratic curve as the operating frequency is increased, so the coupling effect of this embodiment is extremely It will become larger. The connecting point is the mounting frame 12
The greater the distance from the target, the more effective it is. therefore,
It is desirable to increase the distance as much as possible.

FIG. 3 shows a second embodiment.

In this embodiment, in addition to the connecting member 19 of the first embodiment,
Electric element portion 14a of each compressor element 13a, 13b
, 14b are also connected by a second connecting member 20. The rest of the structure is the same as that of the first embodiment, so corresponding parts in the figure are given the same reference numerals as in FIG. 1 and their explanation will be omitted.

According to such a second embodiment, each compressor element 1
3a and 13b are connected by connecting members 19 and 20 at two locations in the vertical direction of the frame 12, so that the rigidity is further improved and the vibration reduction effect is further improved. In particular, in this embodiment, the second connecting member 20 is attached to the frame 12.
Since it is spaced far apart from the base, a greater holding strength can be obtained.

Note that the above effect is greater as the number of connection points increases and as the distance between connection points increases, so it goes without saying that other connection members may be provided.

FIG. 4 shows a third embodiment.

In this embodiment, the connecting member 21 connecting the compressor elements 13a, 13b is the compressor element 13a, 1
It is constructed integrally with the component 3b. That is, the muffler 16a of each structural compressor element 13a, 13b,
The mufflers 16b are made of one continuous part, and the continuous part 21 is used as a connecting member between the two mufflers 16a and 16b. The rest of the structure is the same as that of the first embodiment, so corresponding parts in the figure are given the same reference numerals as in FIG. 1 and their explanation will be omitted.

Also in the third embodiment, each compressor element 13a, 13b is attached to the frame 1 as in the previous embodiment.
Since the compressors 13a and 13 are connected by a connecting member 21 in addition to 2, it goes without saying that the rigidity is improved and a vibration reduction effect is obtained.
Since b is a common part and the connecting member 21 is constructed using it, no special additional member is required, and the structure can be simplified and the ease of manufacture and assembly can be further improved.

Note that the compressor elements 13a, 13 as connecting members
Components b are mufflers 16a, 16 according to the third embodiment.
The present invention is not limited to b, and may be applied to other structural members.

〔Effect of the invention〕

As described above, according to the present invention, the compressor elements are connected to each other by the connecting member at a certain distance from the frame, so that there is no need to increase the thickness of the frame or use reinforcing materials. In other words, it is possible to reduce vibrations, noise, etc. without deteriorating manufacturability or assemblability.

[Brief explanation of the drawing]

FIG. 1 is an overall sectional view showing a first embodiment of a hermetic compressor according to the present invention, FIG. 2 is a characteristic diagram showing the operation of the hermetic compressor, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a cross-sectional view of the main part showing the third embodiment of the present invention, and FIG.
The figure is a sectional view showing a conventional hermetic compressor. 11... Sealed case, 12... Frame for installation, 1
3a, 13b... Compressor element, 19. 20°21...Connecting member. Applicant's agent Hisashi Hatano (L)
) $2 figure

Claims (1)

[Claims] In a hermetic compressor in which a mounting frame is constructed in a sealed case, and a plurality of compressor elements are fixedly supported in parallel on this mounting frame, the compressor elements are arranged at positions spaced apart from each other by a certain distance from the mounting frame. , a hermetic compressor characterized in that the compressors are connected to each other by a connecting member.