JPH02173384A - Refrigerant pump - Google Patents

Abstract

PURPOSE:To prevent suction of impurities and wear powder in a closed container into a compression chamber and to prevent the poor motion of a pump by providing a suction pipe and a delivery pipe, which are coupled directly to a cylinder with which a compression machine part is formed. CONSTITUTION:An end shell 8 is extended through an end part 32a of a refrigerant suction pipe 32, and is forcibly inserted directly in a suction hole 15 formed in a cylinder 16. A liquid refrigerant from an air conditioning system flows through the suction pipe and flows directly through the suction hole of the cylinder to a compression chamber. Thereby, the liquid refrigerant does not agitate the interior of a closed container, and is prevented from suction of impurities and wear powder. This constitution enables prevention of the poor motion of a refrigerant pump and permits improvement of reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerant pump widely used in the field of refrigeration and air conditioning.

BACKGROUND OF THE INVENTION In recent years, in the refrigeration and air conditioning industry, some air conditioning equipment equipped with a refrigerant pump that circulates liquid refrigerant within an air conditioning system has been commercialized.

A conventional refrigerant pump will be explained below with reference to the drawings.

To 2-7 In Figures 4 to 7, 1 is a conventional refrigerant pump, and 2
vA5 is a closed container with a cylindrical body shell 3 and an end shell with electrodes 4 that seal the openings 3a at both ends of the body shell 3.
and an end shell/l/B equipped with a discharge pipe 6 and a suction pipe 7
It consists of 8. A stator 9 and a rotor 1 are placed in a sealed container 2.
0, a shaft 13 rotatably driven by a rotor 10 and having an eccentric portion 12, a compression chamber 14, and a cylinder 16 formed with a suction hole 16 and a discharge hole 19 communicating with the compression chamber 14. The eccentric portion 12 of the shaft 13 is located within the compression chamber 14, and the shaft 1
A roller 17 that rotates and slides as the eccentric portion 12 of No. 3 rotates.
Built-in. 18 is a vane with suction hole 15 and discharge hole 1
Vane dividing 9, 55+72.

The vane 18 is constantly pressed toward the roller 17 by the spring 21.

A bearing 22 rotatably supports the center 13a of the shaft 13 adjacent to the cylinder 16, and an outer circumferential surface 22a of the bearing 22 is in internal contact with the closed container 2. The suction tube communicating with the inside of the sealed container 2 is the suction tube 3, and the end A7a of the tube 7 is connected to the welded part A23 and the end shell B.
It is fixed at 8. The discharge pipe 6 passes through the end shell B8 and connects to the discharge hole 19 of the cylinder 16 at the end B6a of the discharge pipe 6.
This is due to the pressure being inserted. The airtight container 2 is filled with a liquid refrigerant 24.

Reference numeral 25 denotes a pressure equalizing hole having a small diameter formed in a part of the discharge pipe 6, which communicates the closed container 2 with the discharge pipe 6.

In the above configuration, the shaft 13 and the rotor 10 rotate at the same time that electricity is supplied from the electrode 4 to the motor part 11, and the liquid refrigerant returned from the air conditioning system (not shown) passes through the suction pipe 7 and enters the closed container 2. The discharged and stirred water 1 flows into the compression chamber 14 of the cylinder 16 through the suction hole 15, and is forced into the compression chamber 14 by the rotation of the roller 17, and is pumped through the discharge hole 19. It passes through a discharge pipe 6 and is sent to an air conditioning system (not shown). In addition, a very small amount of the liquid refrigerant that is force-fed through the discharge pipe 6 is
5, it flows out into the closed container 2 and maintains the inside of the closed container 2 at high pressure.

Problems to be Solved by the Invention However, with the above configuration, the liquid refrigerant discharged from the suction pipe into the sealed container is stirred within the sealed container, so impurities and wear particles in the sealed container are removed from the suction hole. Since more of the refrigerant is sucked into the compression chamber and shunted, there is a problem in that the refrigerant pump malfunctions and the reliability of the refrigerant pump is reduced.

In view of the above problems, the present invention provides a highly reliable B refrigerant pump that eliminates malfunctions of the refrigerant pump.

Means for Solving the Problems In order to solve the above-mentioned problems, the refrigerant pump of the present invention is provided with a suction pipe and a discharge pipe directly connected to a cylinder forming a compressor machine part.

Effect of the Invention With the above-described configuration, the liquid refrigerant from the air conditioning system flows directly into the suction hole through the suction pipe, so that impurities and abrasion particles in the closed container can be sucked in without stirring the inside of the closed container. Since there is no suction into the inverse compression chamber through the holes, malfunction of the refrigerant pump can be prevented and reliability can be improved.

5-7 Example A refrigerant pump according to an example of the present invention will be described below with reference to the drawings. Note that parts that are the same as those in the conventional example will be described using the same reference numerals, and parts that are the same in structure and operation will be omitted.

In FIGS. 1 to 3, 31 is a refrigerant pump of the present invention;
32 is a suction pipe, and the end C32a of the suction pipe 32 passes through the end shell B8 and is connected to the suction hole 1 formed in the cylinder 16.
5 is directly press-inserted.

In the above configuration, the liquid refrigerant from the air conditioning system passes through the suction pipe, directly flows into the suction hole of the cylinder, and enters the compression chamber.

Therefore, since there is no need to stir the inside of the closed container and no impurities or abrasion particles present in the closed container are sucked in, malfunction of the refrigerant pump can be prevented and reliability can be improved.

Effects of the Invention As described above, the present invention forms a suction pipe and a discharge pipe that are directly connected to the cylinder forming the compressor machine part, so that the liquid refrigerant from the air conditioning system passes through a part of the pipe to the suction 6 and is directly connected to the cylinder. Since the refrigerant flows into the suction hole and enters the compression chamber, it does not stir the inside of the sealed container and does not suck in impurities or wear powder inside the sealed container, which prevents malfunction of the refrigerant pump and improves reliability. can be improved.

[Brief Description of the Drawings] Fig. 1 is a cross-sectional view of a refrigerant bomb in an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line A-A' in Fig. 1, and Fig. 3 is a cross-sectional view taken along line A-A' in Fig. 1. -B' cross-sectional view in the direction of arrows, Figure 4 is a cross-sectional view of a conventional refrigerant pump, and Figure 5 is CC' in Figure 4.
A sectional view taken along the arrow, FIG. 6 is a sectional view taken along line DD' in FIG. 4,
FIG. 7 is a cross-sectional view taken along the line EE' in FIG. 5. 6...Discharge pipe, 16...Cylinder, 31...
... Refrigerant pump, 32... Suction pipe.

Claims (1)

[Claims] A motor section comprising a stator and a rotor, a compressor machine section driven by the motor section, and a compressor machine section driven by the motor section, in a closed container consisting of a cylindrical body shell and an end shell that seals openings at both ends of the body shell. A refrigerant pump comprising a suction pipe and a discharge pipe directly connected to a cylinder forming a refrigerant pump.