JPS63243481A - Scroll compressor - Google Patents

Abstract

PURPOSE:To promote the improvement of room heating power, by providing injection ports with a diameter larger than the thickness of a lamp of a turning scroll, in the case of a compressor which provides each fixed and turning scroll further increases the room heating power by gas injection. CONSTITUTION:A main shaft 3 is rotatably supported to an opening 2a of a frame 2 provided in an enclosed vessel 1, further a centrifugal pump 3a, for pumping up lubricating oil 4 to a compressing mechanism part 5, is provided in the main shaft 3. And the compressing mechanism part 5 is constituted of mutually meshing turning and fixed scrolls 6, 7. Here the fixed scroll 7 provides in its end plate 7a plural injection ports 9, 10 having a diameter larger than the thickness of a lap 6b of the turning scroll 6. And each port 9, 10 communicates with plural injection pipes 11, 12 branching from a refrigerating circuit and penetrating through an upper wall part of the enclosed vessel 1. In this way, the amount of injection gas is increased.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a scroll compressor having a configuration in which heating capacity is increased by a gas injector.

(Prior art) Conventionally, gas injection of a scroll compressor has normally used a boat diameter smaller than the lap thickness of an orbiting scroll.0 (Problem to be solved by the invention) However, such a When this configuration is adopted, there is a problem that the injector y flow rate is insufficient due to the resistance of the injection port.Also, to prevent this, there is a method to make an elliptical hole along the vortex, but such Processing was difficult.

This invention was made in order to solve these problems, and it has a relatively simple structure, is easy to manufacture, and can reduce the flow rate of injector gas by a sufficient amount to provide a high heating capacity. The purpose is to provide compressors.

[Structure of the Invention] (Means and Effects for Solving the Problems) In order to achieve the above object, the present invention provides a scroll configured to include a fixed scroll and an orbiting scroll and increase heating capacity by using a gas injector. The compressor 1 is characterized in that an injection boat having a diameter larger than the thickness of the wrap of the orbiting scroll is provided.

With this configuration, there is no resistance to the injection boat, so the moment the suction gas is trapped by a pair of scrolls, the boat is inserted into the second compression chamber from the outside by selecting the appropriate location. By installing the injector in the position where the gas is injected, the gas is injected into the second compression chamber from the outside, the rest of the gas is injected into the first compression chamber from the outside, and most of the gas is injected into the first and second compression chambers from the outside. Since the fuel can be injected, a larger injection flow rate can be obtained.

(Example) Next, an example of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a closed container, the interior of which is divided by a frame 2 into two spaces.

There is a circular opening 2a in the center of the frame 2, and the main shaft 3 is supported by this opening 2a. The main shaft 3 is provided with a centrifugal pump 3 a for pumping lubricating oil 4 stored at the bottom of the closed container 1 to the compression mechanism section 5 .

The compression mechanism section 5 is composed of an orbiting scroll 6 and a fixed scroll 7 which are meshed with each other and are provided in a temperature condition. The rotating suflow A/6 has a wrap 6 having a spiral shape with an involito curve standing upright from the end plate 6a and its surface t.
b and a ring body 6C provided upright on the back surface of the mirror plate 6a.
The ring body 6C is integrally supported by the main shaft 3 by fitting the cylindrical protrusion 3b of the main shaft 3 into the ring body 6C.

An Oldham ring 8 is provided between the orbiting scroll I/6 and the frame 2 to prevent the orbiting scroll 6 from rotating during its orbiting motion.

On the other hand, the fixed scroll 7 consists of an end plate 7a and a spiral wrap 7b with an inverted curve provided upright on the back surface of the end plate 7a. It is fixed in contact with. The two wraps 7b of the fixed scroll 7 and the wrap 6b of the orbiting scroll 6 are engaged with each other to form a plurality of compression chambers as will be described in detail later.

The mirror plate 7a of the fixed scroll 7 is provided with an injection boat 9.10 that selectively opens into these compression chambers, and these ports 9.10 are provided through the base wall of the closed container 1. It is connected to Injiexi Yotsuvibe 11.12. These pipes 11, 12 are provided branching off from the refrigeration circuit of the refrigeration cycle.

A rotor 13 is attached to the intermediate part of the main shaft 3.
A stator 14 is fixed to the inner wall of the closed container 1 on the outer peripheral portion 1 of the container 1, and an electric motor 15 for driving the main shaft 3 is configured.

Note that 16 and 17 are suction pipes for refrigerant, respectively.In a scroll compressor configured as described above, when the electric motor 15 is driven to rotate the main shaft 3, the orbiting scroll 6
starts rotating movement. Airtight container 1 from suction pipe 16
The refrigerant supplied inside is compressed in the compression mechanism section 5, discharged into the closed container 1 through the central opening 7C of the fixed scroll 7, and further sent out to the outside through the discharge pipe 17.

The lubricating oil stored at the bottom of the closed container 1 is pumped up by a centrifugal pump 3al provided on the main shaft 2 and supplied to the compression mechanism 5 to lubricate its sliding surface.

Next, referring to FIGS. 2(a) to 2(d), the compression mechanism section 5 is
In the state shown in FIG. 2(a), the compression chambers 9 and 10 are respectively 0. -0si is open. When the orbiting scroll 6 rotates and reaches the state shown in FIG. 2(b), the engine boat 9 moves into the compression chamber C1.
It is open to Further, in the state shown in FIGS. 2(C) and 2(d), the injection ports 9 and 10 each open into the compression chamber 0x-Ol. Figure 2 (a) or 10
opens into both the compression chamber C4 and the tow.

Thus, in this scroll compressor, the rotation speed / I / 6
During the rotational movement of the compressor, one or two of the compression chambers 01-04 are always open, so that more gas can be pumped out, thus improving the heating capacity. be able to.

During the orbiting movement of the orbiting scroll 6, each compression stage 0, -
0. The suction, compression, and discharge strokes proceed simultaneously, allowing efficient compression with extremely small fluctuations in drive torque.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications within the scope of the invention.

[Effects of the Invention] According to the present invention, a scroll compressor is provided which has a relatively simple structure and is easy to manufacture, and which can sufficiently reduce the flow rate of injecting gas and has a high heating capacity. can do.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing the configuration of an embodiment of the present invention, and FIGS. 2(a) to 2(d) show the relationship between the engine boat and each compression chamber during the orbiting motion of the orbiting scroll in the same embodiment. FIG. DESCRIPTION OF SYMBOLS 1... Airtight container 2... Frame 3... Main shaft 3a... Centrifugal pump 3b... Cylindrical protrusion part 4... Lubricating oil 5... Compression mechanism part 6... Orbiting scroll 6a ...End plate 6b...Wrap 6C...Ring body 7...Fixed scroll 7a...End plate 7b...Wrap 8...Oldham ring

Claims (2)

[Claims] (1) A fixed scroll and an orbiting scroll are provided with a spiral wrap standing upright on an end plate, the wraps of both scrolls are engaged with each other, and the orbiting scroll is rotated relative to the fixed scroll, and heating is performed by gas injection. A scroll compressor configured to increase capacity, characterized in that an injection port is provided with a diameter larger than the thickness of the wrap of the orbiting scroll. (2) The injection port opens from the outside at the moment when the suction gas is trapped by both scrolls.
The scroll compressor according to claim 1, wherein the scroll compressor is provided at a position where gas is injected into the second compression chamber.