JPS60108600A - Ejector suction pump - Google Patents

Abstract

PURPOSE:To obtain an ejector suction pump having high suction efficiency by providing a suction tube of ejector suction pump to be employed in an ejector type cooler near the center of axis while forming nozzle ring around said tube thereby reducing the flow path resistance of suction tube. CONSTITUTION:A linear refrigerant vapor supply tube 32 is provided at one end of ejector suction pump 30 while matching the center with that of pump 30 to feed refrigerant vapor linearly. It is opened in a mix chamber 33 to form ring nozzles 34 with the outercircumference at the tip of said tube 32 and the inner wall of mix chamber 33.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to an improvement of an ejector pump for use in an ejector type cooling device.

[Traditional techniques]

Ejector type cooling equipment is also called steam injection cooling equipment a.
The high-temperature, high-pressure steam generated from the drive steam generator is ejected from the nozzle in the ejector at iR speed If, thereby pulling the low l#A low-pressure steam from the evaporator, and then distributing both in the diffuser in the ejector. The mixture is compressed and sent to the condenser, and the cooling effect is achieved by the heat of vaporization of the refrigerant in the evaporator.

An example of an ejector suction pump used in such an ejector type cooling device a is the one shown in No. 11A'l. This ejector suction pump 1 is connected to a drive steam inlet 2 connected to a drive steam generator (not shown), a refrigerant method LAJ inlet δ connected to an evaporator (not shown), and a condenser (not shown). The refrigerant vapor inlet 8 supplies the mix chamber 5 provided in the inlet lower flζmin g((()). Yampa 5
It will be communicated to. A diffuser 7 having a narrowed middle portion is formed between the mix chamber 5 and the discharge port 4.

The diffuser 7 has a tapered part 7a, a parallel part 7b, and a widened part 7C.
It consists of eight parts.

FIG. 2 is a diagram showing an example of an ejector type cooling device using this ejector suction pump l. This ejector type cooling device is a schematic representation of the gist of the device described in Japanese Patent Publication No. 58-21942. In FIG. 2, a driving steam generator 11 is connected to an ejector via a pipe 12 that supplies high-temperature, high-pressure steam. It communicates with the Laval nozzle 6 through the drive steam inlet 2 of 11. A pipe line 18 is connected to the refrigerant vapor inlet 8.
The evaporator 14 is communicated through the evaporator 14. The discharge port 4 is connected to the pipe line 15
It communicates with the condenser 16 via. 17 is a fan for cooling the condenser 16. The outlet side of the condenser 16 is connected to 2 pipes.
It is also connected on the one hand through a line 18 via a pump 19 to the drive steam generator 11 and on the other hand via a line 20 and an expansion valve 21 to the evaporator 14 .

Next, the operation of the ejector suction pump 1 will be explained together with the operation of the entire ejector type cooling system. When high-temperature, high-pressure driving steam is sent from the steam generator 11 to the driving steam inlet 2, this driving steam is accelerated by the Laval nozzle 6, becomes supersonic, and forms a n(j river flow 8). At this time, the ejected driving steam pulls the gas in the mix chamber 5, so the pressure in the mix chamber 5 decreases, and the refrigerant vapor inlet 8 is
Then, low-temperature, low-pressure refrigerant vapor generated from the evaporator 14 is sucked into the mix chamber 5. At this time, cooling is performed using the heat of vaporization of the refrigerant in the evaporator. Driving method mixed in the mix chamber 5 (mixed vapor with refrigerant vapor is IE & 4 in the diffuser 7 to increase pressure, then discharged from the discharge port 4, cooled in the condenser 16, liquefied, pump 19 and expanded Via the valve 21 it is sent to the drive steam generator ]1 and (ζ generator 14).

However, in such a conventional ejector suction pump, a driving steam injection nozzle is installed at the axis of the ejector suction pump, and refrigerant vapor is sucked from around this nozzle, and the refrigerant inlet 18 is driven Since it is provided only in one direction perpendicular to the steam injection direction, the efficiency of towing the refrigerant vapor of the driving steam 10 on the side opposite to the refrigerant inlet 3 is lower than that of the driving steam 9 on the side of the refrigerant inlet δ, Therefore, the overall refrigerant vapor suction efficiency decreases. Furthermore, when the pressure inside the mix chamber 5 increases due to pressure fluctuations of the refrigerant vapor to be sucked in, the jet flow 8 of the driving vapor may separate within the nozzle 6 as shown in FIG. There was a problem that the suction efficiency was reduced due to the IO being obstructive.

[Purpose of the invention]

The purpose of the present invention is to solve the problems with the conventional ejector suction pump, and to provide an ejector suction pump that has a simple and inexpensive I5 configuration and has good refrigerant vapor suction efficiency. 1.

[Structure of the invention]

In order to achieve this object, the ejector suction pump of the present invention has a suction pipe for sucking low-temperature, low-pressure refrigerant vapor near the shaft of the ejector suction pump, and a ring-shaped nozzle is formed around this suction pipe. It is characterized by being able to eject driving steam at a higher temperature and higher pressure.

〔Example〕

The ejector suction pump of the present invention will be described in detail below with reference to the drawings.

FIG. 4 is a diagram showing an embodiment of the present invention.

First, to explain the structure, this ejector suction pump 80 is provided with a refrigerant vapor introduction pipe 82 having a refrigerant vapor introduction port 81fr at one end so that its axis coincides with the axis of the ejector 1 suction pump 80. The other end of the refrigerant vapor introduction pipe 82 opens into the mix channel nozzle 33, and a ring-shaped Laval nozzle 84 is formed by the outer periphery of the tip of the other end of the refrigerant vapor introduction pipe 82 and the inner wall of the mix channel nozzle 38. do.

The driving steam inlet 35 communicates with the rubber nozzle 84 through the storage chamber 86. The O diffuser 87 is composed of a tapered part 37a, a parallel part 37b, and a diverging part 870, and has almost the same structure as the conventional example described in 1111. It is something. 38 is a discharge port connected to a condenser (not shown).

FIG. 5 is a diagram showing an example of an ejector type cooling device using this ejector suction pump 30. Drive steam generator 41
is communicated with the Laval nozzle 84 through the driving steam inlet 85 of the ejector device 30 via the conduit 42 that supplies high-temperature, high-pressure steam through the air storage chamber 26. An evaporator 44 is communicated with the refrigerant vapor inlet 21 via a pipe 48 . Discharge port 8
8 is connected to a condenser 46 via a conduit 45. 47 is a cooling fan for the condenser 46. The outlet side of the condenser 46 is divided into two pipes, and one is connected to the pump 49 through the pipe 4B.
The capacity is connected via a line 50 and an expansion valve 51 to an evaporator 44 .

Next, the operation of this ejector suction pump 80 will be explained together with the operation of the entire ejector type cooling system.

When the high-temperature, high-pressure driving steam generated by heating in the driving steam generator 41 is sent to the driving steam inlet 35, this driving steam is stored in an air storage chamber 86 and then passed through a ring-shaped Laval nozzle 84. As a result, an outflow 11a) is formed in the mix chamber 83 and ejected at supersonic speed. As a result, the gas in the mix chamber 83 is pulled and the pressure in the mix chamber 88 is lowered, and the evaporator 44
The lower Y crystal low pressure refrigerant vapor is sucked into the refrigerant vapor inlet 8.
The refrigerant vapor is introduced from I through g82 into the mix channel/<
83. The driving steam and the refrigerant vapor are mixed in the mix chamber 8B, compressed in the Difco-IJ'37, and after the Tagata rises, they are sent to the condenser 46 from the discharge 1]88, where they are cooled and liquefied. After, pump 4
9 and driven again via the expansion valve 51 #, air generator 41
and sent to the evaporator 44.

〔Effect of the invention〕

According to the ejector suction pump of the present invention in which the refrigerant vapor introduction pipe is provided near the axis of the ejector suction pump and the ring-shaped nozzle is formed around the introduction pipe, the refrigerant vapor introduction pipe is arranged near the axis of the ejector suction pump. The straight pipe reduces suction resistance, and the refrigerant vapor comes into uniform contact with the driving steam in all directions, increasing the refrigerant vapor suction efficiency.
The cooling capacity of the cooling device a using this ejector suction pump can be increased. Furthermore, if the shape of the ring-shaped Laval nozzle is set so that the ejecting direction of the driving steam is directed inward as in the above embodiment, separation of the ejected flow of the single-moving steam at the outer wall of the refrigerant vapor introduction pipe will occur. It also has the advantage that efficiency decreases less when the steam suction pressure increases.

4 Figure 1111 (r) fin it i9 light Figure 1 is a cut-away diagram showing the configuration of a conventional ejector suction pump, and Figure 2 shows the configuration of an example of an ejector-type cooling system using the ejector suction pump shown in Figure 1. FIG. 8 is a cross-sectional view showing the separation state of the jet flow in the ejector suction pump of FIG. 1, FIG. 4 is a cross-sectional view showing the configuration of an embodiment of the ejector suction pump of the present invention, and FIG. 1g shows the configuration of an example of an ejector-type cooling device in which the ejector suction pump of FIG. 4 is used.

1... Ejector suction pump 2... Driving steam inlet 3... Refrigerant vapor inlet 4.
...Discharge ff10 5...Mix chamber 6...Laval nozzle 6a...Skirt part 1...Diffuser 7a...Tapered part 7b...Parallel part 7C...Divergent part 8...Jouting flow 9. IO... Drive steam 11... Drive steam generator 12.13... Pipe line 14... Evaporator
15...Pipeline 16...Condenser 17...Cooling 3I fan 18...
・Pipe line 19... Pump zO... Pipe line 21... Expansion valve 30... Ejector suction pump 31 ・ Refrigerant vapor introduction port 82... Refrigerant vapor introduction pipe a3
...Mix chamber 84...Laval Nostle 35
・・Drive steam inlet 86 ・Air storage chamber 37-diffuser 87a ・Tapered part 87b ・Parallel part 870 ・
... Diverging part 38... Discharge port 41... Drive steam generator 42, 43-pipe line 44... Evaporator 45... Pipe line
46...Condenser 47...Fan 48...Pipe 4$)...Pump 50...Pipe 51...Expansion valve.

Patent applicant: Nissan Auto Body Co., Ltd.

Claims (1)

[Claims] ] - a mix chamber, a tiff user connected to the mix chamber, a nozzle that jets out all the high-temperature, high-pressure, rumbling steam from the mix chamber toward the diffuser, and a refrigerant vapor that introduces low-temperature, low-pressure refrigerant vapor into the mix chamber. , an inlet pipe, the refrigerant vapor inlet pipe is provided near the axis of the ejector suction pump, and the nozzle is formed as a ring-shaped nozzle around the refrigerant vapor inlet pipe.