JPH0710484U - Gas compressor - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To prevent a significant decrease in cooling performance due to pressure loss in the low-pressure or high-pressure gas hose, and to reduce the pressure pulsation of the refrigerant gas. [Structure] A casing 1 is provided with a preliminary suction chamber 30, a preliminary discharge chamber 31, a suction port 34 and a discharge port 35. The preliminary suction chamber 30 communicates with the suction chamber 4 and the preliminary discharge chamber 31 communicates with the discharge chamber 5, and also suctions. One end of the port 34 is the preliminary suction chamber 30.
In addition, one end of the discharge port 35 opens into the preliminary discharge chamber 31. In this way, both ports 34 and 35 are arranged on a wide casing 1 in which the length and route to the evaporator and condenser can be freely selected, and both ports 34 and 35 and the evaporator and condenser are short and low-pressure or high-pressure gas hose 7 with little bending. , 9, and the pressure pulsation of the low-pressure refrigerant gas is suppressed in the preliminary suction chamber 30, and the pressure pulsation of the high-pressure refrigerant gas is suppressed in the preliminary discharge chamber 31.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a gas compressor applied to an on-vehicle air conditioner system, etc., particularly due to pressure loss in a low pressure gas hose for recovering low pressure refrigerant gas from an evaporator and a high pressure gas hose for supplying high pressure refrigerant gas to a condenser. The cooling performance can be prevented from being significantly reduced and the pressure pulsation of the refrigerant gas can be reduced.

[0002]

[Prior art]

 Conventionally, this type of gas compressor has a casing 1 of one-end opening type as shown in FIG. 3, a front head 2 is attached to the opening end of the casing 1, and a compressor is provided in the casing 1. A main body 3 is provided, a suction chamber 4 is formed inside the front head 2, and a discharge chamber 5 that also serves as an oil storage chamber is provided on the inner surface of the side end of the casing 1.

A suction passage 6 is formed in the front head 2, one end of the suction passage 6 is provided as a suction port 6 a, and a low pressure for recovering a low pressure refrigerant gas from an evaporator (not shown) of an air conditioning system is provided. While the gas hose 7 is connected, the other end 6b of the suction passage 6 is opened to the suction chamber 4.

A discharge passage 8 is formed in the casing 1, one end 8a of the discharge passage 8 is provided as a discharge port, and a high pressure for supplying a high pressure refrigerant gas to a condenser (not shown) of the system. While the gas hose 9 is connected, the other end 8b of the discharge passage 8 is opened to the discharge chamber 5.

A cylinder chamber 13 having an elliptical cross section as shown in FIG. 4 is formed in the compressor body 3 by the front side block 10, the cylinder 11 and the rear side block 12, and the cylinder chamber 13 has a circular cross section. The rotor 14 is rotatably arranged, and the shaft center (rotor shaft) 15 of the rotor 14 is supported by the bearing portions 16 and 17 of the front side block 10 and the rear side block 12.

A vane groove 18 is radially formed in the rotor 14, and a vane 19 is slidably arranged in the vane groove 18. The vane 19 is provided with a centrifugal force and a vane generated by the rotation of the rotor 14. It is provided so as to be urged toward the inner peripheral surface of the cylinder 11 by the back pressure of the lubricating oil supplied into the groove 18.

In such a compressor body 3, when the rotor 14 rotates, the low-pressure refrigerant gas in the suction chamber 4 is sucked and compressed as shown by the solid arrow, and is discharged as high-pressure refrigerant gas in the discharge chamber 5 as shown by the broken arrow. Discharge into.

At this time, the low-pressure refrigerant gas in the suction chamber 5 is introduced from an evaporator (not shown) via the low-pressure gas hose 7 and the suction passage 6, and the high-pressure refrigerant gas is introduced from the compressor body 3 into the discharge chamber 5. At the time of discharging, the lubricating oil is separated from the high-pressure refrigerant gas in the oil separator 20, and the high-pressure refrigerant gas from which the lubricating oil has been separated is supplied from the discharge passage 8 to the condenser (not shown) via the high-pressure gas hose 9 while The separated lubricating oil is stored in the discharge chamber 5 and is pressure-fed by the pressure (discharge pressure) of the high-pressure refrigerant gas through the oil supply passage 21 into the bearings 16 and 17 and from the bearings 16 and 17 into the vane groove 18. .

[0009]

[Problems to be solved by the device]

 However, in such a conventional gas compressor, as described above, the suction passage 6 is formed in the front head 2 located in the front portion of the compressor body, and the discharge passage 8 is formed in the rear portion of the casing 1, and the suction passage 6 is formed. Since one end of the passage 6 is provided as the suction port 6a and one end of the discharge passage 8 is provided as the discharge port 8a, the position of the suction port 6a is limited to the front head 2 and the position of the discharge port 8a is limited to the rear portion of the casing 1. Depending on the type of air conditioning system, a long and highly bent low-pressure gas hose 7 or high-pressure gas hose 9 is required to connect the evaporator to the intake port 6a or the condenser to the discharge port 8a. The pressure loss will increase and the cooling performance will decrease significantly.

Moreover, one of the roles of the suction chamber 4 and the discharge chamber 5 is to suppress the pressure pulsation of the low-pressure refrigerant gas and the high-pressure refrigerant gas. There is also a problem that it cannot be suppressed.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent a significant decrease in cooling performance due to a pressure loss in a low-pressure gas hose or a high-pressure gas hose, and yet to prevent pressure pulsation of refrigerant gas. To provide a gas compressor suitable for reducing

[0012]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is directed to a casing of one-end opening type, a front head attached to the opening end of the casing, a compressor main body arranged in the casing, and the front head. The compressor body has an intake chamber formed inside and a discharge chamber provided on the inner surface of the side end of the casing, and the compressor body sucks and compresses the low-pressure refrigerant gas in the suction chamber and discharges it into the discharge chamber. In the gas compressor, the casing has a preliminary suction chamber communicating with the suction chamber, a suction port having one end opened to the preliminary suction chamber, a preliminary discharge chamber communicating with the discharge chamber, and one end connected to the preliminary discharge chamber. It is characterized in that an open discharge port is provided.

[0013]

[Action]

 According to this invention, both the suction port and the discharge port are arranged on a wide casing where the length and route to the evaporator or condenser of the air conditioning system can be freely selected, and both the preliminary suction chamber and the preliminary discharge chamber are arranged. The auxiliary suction chamber suppresses the pressure pulsation of low-pressure refrigerant gas before the suction chamber, and the preliminary discharge chamber suppresses the pressure pulsation of high-pressure refrigerant gas after the discharge chamber.

[0014]

Embodiment An embodiment of the gas compressor according to the present invention will be described below in detail with reference to FIGS. 1 and 2.

A basic structure of the gas compressor, for example, a casing 1 having an open end is provided, a front head 2 is attached to an open end of the casing 1, and a compressor body 3 is provided inside the casing 1. Is provided, a suction chamber 4 is formed inside the front head 2, a discharge chamber 5 is provided on the inner surface of the side end of the casing 1, and the compressor body 3 is suctioned. The suction and compression of the low-pressure refrigerant gas in the chamber 4 and the discharge into the discharge chamber 5 are the same as those of the conventional gas compressor described above, and therefore the same members as those shown in FIG. The same reference numeral as that of No. 3 is given, and the detailed description is omitted.

The gas compressor shown in FIG. 1 has a preliminary suction chamber 30, a preliminary discharge chamber 31, a low-pressure gas communication passage 32 and a high-pressure gas communication passage 33, both of which are the casing 1 and the casing 1. Is formed as a wide groove-like recess on the outer peripheral surface of the low pressure gas communication passage 32 (see FIG. 2). One end of the passage 33 is opened to the preliminary discharge chamber 31, and the other end is opened to the discharge chamber 5.

That is, the preliminary suction chamber 30 is provided so as to communicate with the suction chamber 4 via the low pressure gas communication passage 32 and the suction passage 6, and the preliminary discharge chamber 31 is provided so as to communicate with the discharge chamber 5 through the high pressure gas communication passage 33. Has been.

The preliminary suction chamber 30 is sealed by a lid plate 36, and the preliminary discharge chamber 31 is also sealed by a lid plate 37. The lid plate 36 for sealing the preliminary suction chamber 30 has a suction port 34. A discharge port 35 is integrally provided on the lid plate 37 for sealing the preliminary discharge chamber 31.

One end of the suction port 34 is opened to the preliminary suction chamber 30, and the other end is connected to a low pressure gas hose 7 for recovering low pressure refrigerant gas from an evaporator (not shown) of the air conditioning system, while One end of the discharge port 35 is opened to the preliminary discharge chamber 31, and the other end is connected to a high pressure gas hose 9 for supplying high pressure refrigerant gas to a condenser (not shown) of the system.

The lid plate 36 of the preliminary suction chamber 30 and the lid plate 37 of the preliminary discharge chamber 31 as described above may be integrated or may be divided into two parts.

Next, the operation of the gas compressor configured as described above will be described with reference to FIG. According to this gas compressor, the compressor body 3 sucks and compresses the low-pressure refrigerant gas in the suction chamber 4 as indicated by the solid arrow, and discharges it as high-pressure refrigerant gas into the discharge chamber 5 as indicated by the dashed arrow. .

At this time, the low-pressure refrigerant gas in the suction chamber 4 is introduced from an evaporator (not shown) through the low-pressure gas hose 7, the suction port 34, the preliminary suction chamber 30, the low-pressure gas communication passage 32, and the suction passage 6, and The high-pressure refrigerant gas in the discharge chamber 5 is supplied to a condenser (not shown) via the high-pressure gas communication path 33, the preliminary discharge chamber 31, the discharge port 35, and the high-pressure gas hose 9.

In this way, when the low-pressure refrigerant gas is introduced from the evaporator into the suction chamber 4 and the high-pressure refrigerant gas is supplied from the discharge chamber 5 to the condenser side, both the preliminary suction chamber 30 and the preliminary discharge chamber 31 are provided with a muffler. The preliminary suction chamber 30 suppresses the pressure pulsation of the low-pressure refrigerant gas before the suction chamber 4, while the preliminary discharge chamber 31 suppresses the pressure pulsation of the high-pressure refrigerant gas after the discharge chamber 5.

Therefore, according to the gas compressor of the above embodiment, the casing is provided with the preliminary suction chamber, the preliminary discharge chamber, the suction port and the discharge port, the preliminary suction chamber is the suction chamber, and the preliminary discharge chamber is the discharge chamber. The suction port is open to the preliminary suction chamber and the discharge port is open to the preliminary discharge chamber, so both the suction port and the discharge port can freely select the length and route to the evaporator or condenser of the air conditioning system. Since it is placed on a wide casing that can be used, the evaporator and suction port or the condenser and discharge port can be connected with a low-pressure gas hose or a high-pressure gas hose that is short and has little bending, which enables the pressure in the low-pressure gas hose and the high-pressure gas hose to be connected. Loss is reduced, cooling performance is improved, and wide groove-shaped recesses (pre-suction chamber and pre-discharge chamber) It is possible to produce gas compressors compatible with air conditioning systems of various sizes simply by providing lid plates with suction ports and discharge ports at various positions within the size range.

Further, according to this gas compressor, both the preliminary suction chamber and the preliminary discharge chamber function as a muffler, and the preliminary suction chamber suppresses the pressure pulsation of the low-pressure refrigerant gas in the preceding stage of the suction chamber, and the preliminary discharge chamber. Suppresses the pressure pulsation of the high-pressure refrigerant gas in the latter stage of the discharge chamber, so that the pressure pulsation of the refrigerant gas becomes small.

Although the preliminary suction chamber and the preliminary discharge chamber are provided on the outer peripheral surface of the casing in the embodiment, they may be provided on the casing side end surface side.

[0027]

[Effect of device]

 In the gas compressor according to the present invention, as described above, the casing is provided with a preliminary suction chamber communicating with the suction chamber, a suction port having one end opened to the preliminary suction chamber, a preliminary discharge chamber communicating with the discharge chamber, and a spare. Since the discharge port has an open end on the discharge chamber, both the suction port and the discharge port are placed on a wide casing that allows the length and route to the evaporator or condenser of the air-conditioning system to be freely selected. The low pressure gas hose or high pressure gas hose with less bending can be used to connect the evaporator to the suction port or the condenser to the discharge port. This reduces pressure loss in the low pressure gas hose or high pressure gas hose and improves cooling performance.

Moreover, according to the present invention, both the preliminary suction chamber and the preliminary discharge chamber function as a muffler, and the preliminary suction chamber suppresses the pressure pulsation of the low-pressure refrigerant gas before the suction chamber, Suppresses the pressure pulsation of the high-pressure refrigerant gas in the latter stage of the discharge chamber, which also has the effect of reducing the pressure pulsation of the refrigerant gas.

[Brief description of drawings]

FIG. 1 is a sectional view of a gas compressor according to the present invention.

FIG. 2 is a view on arrow AA shown in FIG.

FIG. 3 is a cross-sectional view of a conventional gas compressor.

FIG. 4 is a sectional view taken along line IV-IV shown in FIG.

[Explanation of symbols]

 1 Casing 2 Front head 3 Compressor body 4 Suction chamber 5 Discharge chamber 30 Preliminary suction chamber 31 Preliminary discharge chamber 34 Suction port 35 Discharge port

Claims (1)

[Scope of utility model registration request] 1. A one-end open type casing, a front head mounted on the open end of the casing, a compressor body disposed in the casing, and a suction chamber formed inside the front head. And a discharge chamber provided on an inner surface of a side end of the casing, wherein the compressor body sucks and compresses the low-pressure refrigerant gas in the suction chamber and discharges the gas into the discharge chamber. A preliminary suction chamber communicating with the chamber, a suction port having one end opened to the preliminary suction chamber, a preliminary discharge chamber communicating with the discharge chamber, and a discharge port having one end opened to the preliminary discharge chamber. Gas compressor.