JPH08177763A - Scroll compressor - Google Patents

Abstract

PURPOSE: To enhance safety and reliability by preventing strain of a sealed vessel itself and a constitutive part in an unhigh temperature part such as a fixed scroll to constitute a scroll compressing element which is generated by a thermal influence by a compressed gas medium, and accurately detecting a temperature in a delivery gas space. CONSTITUTION: A high temperature high pressure gas medium compressed by a scroll compressing element 3 driven by a motor-driven element housed in a sealed vessel 1, is delivered into a delivery gas space 9 formed above a fixed scroll 4 of the scroll compressing element 3 from a delivery port 8 communicated with a compression space 6, and the gas medium delivered into this delivery gas space 9 is delivered from a delivery pipe 10, and a heat insulating member 21 is arranged on an upper surface 4a of the fixed scroll 4 facing the delivery gas space 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor mounted in, for example, a fluid machine for refrigeration, air conditioning or hot water supply, and more particularly to a hermetic container itself or a scroll compressor generated by a thermal effect of a compressed gas medium. It is intended to prevent distortion of components such as a fixed scroll constituting an element in a non-high temperature portion and to accurately detect the temperature in the discharge gas space, thereby improving safety and reliability.

[0002]

2. Description of the Related Art Conventionally, in a scroll compressor of this type, as shown in FIG. 5, an electric element 2 and a scroll compression element 3 are housed in a closed container 1, and the scroll compression element 3 is a fixed scroll. 4 and the orbiting scroll 5 that revolves around the fixed scroll 4 by the drive of the electric element 2 are meshed with each other to form a compression chamber 6 composed of a plurality of compression spaces. Gas medium (refrigerant) sucked from the suction port 7 in the compression chamber 6
While compressing G, the compressed gas medium G is discharged from the discharge port 8 communicating with the compression chamber 6 into the discharge gas space 9 formed in the upper portion of the fixed scroll 4 as shown in FIG. The gas medium G discharged into the space 9 is discharged from the discharge pipe 10.

[0003]

However, in the scroll compressor having such a conventional structure as described above, especially between the high temperature portion such as the discharge gas space 9 and the components in other non-high temperature portions such as the fixed scroll 4 and the like. Not only is heat insulation not applied to the discharge port 8 as shown in FIG.
Since the gas medium G discharged from the discharge gas space 9 tends to directly flow toward the discharge port 10a side of the discharge pipe 10, it cannot be fully spread over the entire discharge gas space 9. As a result, the heat distribution to the closed container 1 or the fixed scroll 4 becomes non-uniform, and partial distortion occurs in the closed container 1 or the fixed scroll 4, causing a failure such as a leak or a bite.

Moreover, the heat transfer from the high temperature part of the closed container 1 causes the temperature of the component parts in the non-high temperature part to rise abnormally, so that the oil or refrigerant flowing between the parts is heated, and the performance of the oil is In addition to adversely affecting the service life and the like, when the suction refrigerant is heated, the coefficient of performance such as performance and durability of the compressor itself is also lowered.

Conventionally, as shown in FIG. 8, a closed container 1
A copper pipe 11 having a high thermal conductivity is made to face the discharge gas space 9 therein, and a thermistor 12 is built in the copper pipe 11, so that the compression chamber 6 in the scroll compression element 3 in the closed container 1 is provided. There is a device provided with a safety device that promptly detects an abnormal temperature rise and prevents and protects each component such as the scroll compression element 3 due to high temperature from being damaged due to seizure or biting.

However, in such a safety device in which the copper pipe 11 having the thermistor 12 as the temperature detecting means built therein is simply inserted into the discharge gas space 9, for example, when a gas shortage occurs due to a leak in the pipe portion, etc. When the amount of gas circulation is small, as in the above, a large temperature difference occurs between the inside of the compression chamber 6 and the insertion portion of the copper pipe 11 into the discharge gas space 9, and accurate temperature detection cannot be performed. There is a problem in that the compressor does not work or there is a risk that the constituent members in the closed container will be burned due to high temperature and malfunction before the operation of the device, thus lowering the safety and reliability of the compressor.

An object of the present invention is to prevent distortion of components in non-high temperature portions such as a closed container itself and a fixed scroll constituting a scroll compression element, which are generated by a thermal effect of a compressed gas medium, and discharge gas. An object of the present invention is to provide a scroll compressor capable of accurately detecting temperature in space.

[0008]

In order to solve the above-mentioned problems, the first feature of the present invention is to provide an electric element and a scroll compression element which are housed in a closed container, and the scroll compression element is It is composed of a fixed scroll and a oscillating scroll that form a compression chamber composed of a plurality of compression spaces by meshing spirally formed wraps with each other, and the oscillating scroll is oscillated by the drive of the electric element. And revolves around to compress the gas medium in the compression chamber, and the compressed high-temperature and high-pressure gas medium is discharged from the discharge port communicating with the compression chamber into the discharge gas space formed above the fixed scroll. Discharge
In a scroll compressor in which a gas medium to be discharged into the discharge gas space is discharged from a discharge pipe, a heat insulating member is provided on an upper surface of a fixed scroll facing the discharge gas space.

A second feature of the present invention is to include an electric element housed in a closed container and a scroll compression element, and the scroll compression element has a plurality of spirally formed wraps meshed with each other. It consists of a fixed scroll and a oscillating scroll that form a compression chamber consisting of a compression space, and the oscillating scroll is revolved with respect to the fixed scroll by the oscillating motion by the drive of the electric element, and the gas medium is in the compression chamber. The compressed gas medium of high temperature and high pressure is discharged from the discharge port communicating with the compression chamber into the discharge gas space formed in the upper part of the fixed scroll, and discharged into the discharge gas space. In a scroll compressor that discharges from the discharge pipe,
The gas medium discharged from the discharge port into the discharge gas space is discharged in directions opposite to the discharge port of the discharge pipe.

A third feature of the present invention is to provide an electric element and a scroll compression element which are housed in a closed container. The scroll compression element includes a plurality of compression spaces formed by meshing spirally formed wraps with each other. A fixed scroll and an orbiting scroll that form a compression chamber, and the orbiting scroll is revolved with respect to the fixed scroll by an oscillating motion by driving the electric element to compress the gas medium in the compression chamber. Then, the compressed high-temperature and high-pressure gas medium is discharged from the discharge port communicating with the compression chamber into the discharge gas space formed in the upper portion of the fixed scroll, and the temperature detecting means is inserted into the discharge gas space. In the scroll compressor, the gas medium discharged from the discharge port into the discharge gas space directly contacts the temperature detecting means. Is obtained by the provided comprising constituting the ability passages.

[0011]

That is, according to the present invention, by adopting the above configuration, the discharge port for communicating the high temperature and high pressure gas medium compressed in the compression chamber of the scroll compression element driven by the electric element to the compression chamber. To discharge into the discharge gas space formed above the fixed scroll of the scroll compression element, discharge the gas medium discharged into this discharge gas space from the discharge pipe, and insulate the upper surface of the fixed scroll facing the discharge gas space. Since the member is provided, the heat transfer from the high temperature portion such as the discharge gas space to the other non-high temperature portion such as the fixed scroll is suppressed to the utmost as in the past, and as a result, the components in the non-high temperature portion are An abnormal rise in the temperature is prevented.

Further, by causing the gas medium discharged from the discharge port into the discharge gas space to be discharged in the directions opposite to the discharge port of the discharge pipe, the flow of the gas refrigerant is spread all over the discharge gas space. Therefore, the heat distribution to the closed container and the fixed scroll becomes uniform.

Further, by providing the temperature detecting means inserted in the discharge gas space with a passage through which the gas medium discharged from the discharge port can directly come into contact, for example, when a gas shortage occurs due to a leak in the pipe portion or the like. Even if the gas circulation amount is small as in the above, there is almost no temperature difference between the temperature detecting means in the compression chamber and the temperature detecting means in the discharge gas space, which allows accurate temperature detection. , Improve the safety and reliability of the compressor.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, each embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. 1 to 4. FIG. 1 shows a first embodiment of a scroll compressor according to the present invention. Similar to the conventional structure shown in FIGS. 5 and 6, the electric element 2 and the scroll compression element 3 are housed in the closed container 1, and the scroll compression element 3 electrically drives the fixed scroll 4 and the fixed scroll 4. A wrap formed in a spiral shape is engaged with the orbiting scroll 5 that revolves when the element 2 is driven to form a compression chamber 6 composed of a plurality of compression spaces.

The compression chamber 6 has the electric element 2
The gas medium (refrigerant) G sucked from the suction port 7 is compressed by the oscillating motion of the oscillating scroll 5 with respect to the fixed scroll 4 by the driving of the discharge port 8 that communicates the compressed gas medium G with the compression chamber 6. To the discharge gas space 9 formed in the upper portion of the fixed scroll 4, and the gas medium G discharged into the discharge gas space 9 is discharged from the discharge pipe 10.
The heat insulating member 21 is provided on the upper surface 4a of the fixed scroll 4 facing the discharge gas space 9.

That is, according to the present invention having the above-described structure, by providing the heat insulating member 21 on the upper surface 4a of the fixed scroll 4 facing the discharge gas space 9, the fixed scroll 4 can be moved from a high temperature portion such as the discharge gas space 9. The heat transfer to other non-high temperature parts such as the above is suppressed as much as possible, thereby preventing an abnormal rise in the temperature of the component parts in the non-high temperature parts.

2 and 3 show a second embodiment according to the present invention, in which an L-shaped connecting pipe 31 is connected to the discharge port 8 and an opening 31a of the connecting pipe 31 is connected. The discharge pipe 10 is arranged in a direction opposite to 180 ° with respect to the discharge port 10a, whereby the gas medium G discharged from the discharge port 8 into the discharge gas space 9 is discharged.
By forming so as to discharge in a direction opposite to the discharge port 10a of 0, the flow of the gas refrigerant G is introduced so as to reach the entire discharge gas space 9, and to the closed container 1 and the fixed scroll 4 and the like. The heat distribution is uniform.

FIG. 4 shows a third embodiment according to the present invention. In the second embodiment, a housing 42 is formed on the discharge port 8a side of the discharge port 8 via a discharge valve 41. An L-shaped connecting pipe 43 is connected to the housing 42, and an opening portion 43a of the connecting pipe 43 is arranged in an opposite direction of 180 degrees with respect to the discharge port 10a of the discharge pipe 10. The gas medium G discharged from the discharge port 8 into the discharge gas space 9 is discharged into the discharge pipe 1.
A passage 44 is formed so as to discharge in a direction opposite to the discharge port 10a of 0.

The mouth portion 43a of the connecting pipe 43 is
A tip portion 11 of a copper pipe 11 inserted in the discharge gas space 9 and having a built-in thermistor 12 as temperature detecting means.
located near a, thereby allowing the discharge port 8
Since the gas medium G discharged from the nozzle can directly contact the tip portion 11a of the copper pipe 11, a case where the gas circulation amount is small, for example, when a gas shortage occurs due to a leak in the pipe portion, Also has a configuration that enables accurate temperature detection.

[0020]

As is apparent from the above description, according to the present invention, the discharge port for communicating the high temperature and high pressure gas medium compressed in the compression chamber of the scroll compression element driven by the electric element to the compression chamber. To discharge into the discharge gas space formed above the fixed scroll of the scroll compression element, discharge the gas medium discharged into this discharge gas space from the discharge pipe, and insulate the upper surface of the fixed scroll facing the discharge gas space. Since members are provided, as before,
It is possible to suppress the transfer of heat from a high temperature part such as the discharge gas space to other non-high temperature parts such as a fixed scroll as much as possible.
It is possible to prevent the heating of the oil or the refrigerant due to the abnormal rise in the temperature of the component parts in the non-high temperature portion, and thus the performance and durability of the compressor itself can be improved.

In the second aspect of the invention, the gas medium discharged from the discharge port into the discharge gas space is discharged in the directions opposite to the discharge port of the discharge pipe, whereby the flow of the gas refrigerant is changed. Since it is guided over the entire area of the container, the heat distribution to the closed container or fixed scroll can be made uniform, and as before, leakage or biting due to partial distortion of the closed container or fixed scroll, etc. It is possible to prevent the breakdown.

Further, in claim 3, the temperature detecting means inserted into the discharge gas space is provided with a passage through which the gas medium discharged from the discharge port can directly come into contact with the temperature detecting means. Even when the amount of gas circulation is small, such as when there is a shortage, there is almost no temperature difference between the compression chamber and the temperature detection means in the discharge gas space, so accurate temperature detection is possible. Can be performed, which can increase the safety and reliability of the compressor.

[Brief description of drawings]

FIG. 1 is a schematic enlarged cross-sectional view of a main portion of a discharge gas space portion showing a first embodiment of a scroll compressor according to the present invention.

FIG. 2 is a schematic enlarged cross-sectional view of a main portion of a discharge gas space portion showing a second embodiment of the scroll compressor according to the present invention.

FIG. 3 is a schematic cross-sectional plan view of a discharge gas space portion.

FIG. 4 is a schematic enlarged cross-sectional view of a main portion of a discharge gas space portion showing a third embodiment of the scroll compressor according to the present invention.

FIG. 5 is a schematic cross-sectional view showing the overall configuration of a conventional scroll compressor.

FIG. 6 is a schematic enlarged cross-sectional view of a main portion of a discharge gas space portion in the conventional scroll compressor.

FIG. 7 is a schematic enlarged cross-sectional view of a main part showing another example of the discharge gas space portion in the conventional scroll compressor.

FIG. 8 is a schematic enlarged cross-sectional view of a main part showing another example of the discharge gas space portion in the conventional scroll compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Airtight container, 2 ... Electric element, 3 ... Scroll compression element, 4 ... Fixed scroll, 4a ... Upper surface, 5 ... Oscillating scroll, 6 ... Compression chamber, 7 ... Suction port, 8 ... Discharge port, 8a ... Discharge port, 9 ... Discharge gas space, 10 ... Discharge pipe, 10a ... Discharge port, 11 ... Copper pipe ( Temperature detecting means), 11a ... Tip part, 12 ... Thermistor (temperature detecting means), 21 ... Heat insulating member, 31 ... Connection pipe, 31a ... Discharge port, 41 ... Discharge valve 42 ... Housing, 43 ... Connection pipe, 43a ... Discharge port, 44 ... Passage, G ... Gas medium.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Tsutomu Asami 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. A scroll compression element is provided with an electric element and a scroll compression element which are housed in a closed container, and the scroll compression element meshes with each other a spirally formed wrap to form a compression chamber composed of a plurality of compression spaces. A fixed scroll and an orbiting scroll, and the orbiting scroll is revolved with respect to the fixed scroll by an orbiting motion by driving the electric element to compress the gas medium in the compression chamber,
The compressed high-temperature and high-pressure gas medium is discharged from the discharge port communicating with the compression chamber into the discharge gas space formed in the upper portion of the fixed scroll, and the gas medium discharged into the discharge gas space is discharged from the discharge pipe. In the scroll compressor which is discharged, a heat insulating member is provided on the upper surface of the fixed scroll facing the discharge gas space. 2. An electric element and a scroll compression element housed in a closed container, wherein the scroll compression element meshes spirally formed wraps with each other to form a compression chamber composed of a plurality of compression spaces. A fixed scroll and an orbiting scroll, and the orbiting scroll is revolved with respect to the fixed scroll by an orbiting motion by driving the electric element to compress the gas medium in the compression chamber,
The compressed high-temperature and high-pressure gas medium is discharged from the discharge port communicating with the compression chamber into the discharge gas space formed in the upper portion of the fixed scroll, and the gas medium discharged into the discharge gas space is discharged from the discharge pipe. In the scroll compressor which is discharged, the gas medium discharged from the discharge port into the discharge gas space is discharged in directions opposite to the discharge port of the discharge pipe. 3. An electric element housed in a closed container and a scroll compression element, wherein the scroll compression element meshes spirally formed wraps with each other to form a compression chamber consisting of a plurality of compression spaces. A fixed scroll and an orbiting scroll, and the orbiting scroll is revolved with respect to the fixed scroll by an orbiting motion by driving the electric element to compress the gas medium in the compression chamber,
The compressed high-temperature and high-pressure gas medium is discharged from a discharge port communicating with the compression chamber into a discharge gas space formed in the upper portion of the fixed scroll, and a temperature detecting means is inserted into the discharge gas space. In the scroll compressor, there is provided a passage through which a gas medium discharged from the discharge port into the discharge gas space can directly contact the temperature detecting means.