JPS588955A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a refrigeration system equipped with a closed flow passage for refrigerant circulation.

Generally, as shown in Figure 1, a compressor 1 and a condenser 2 are installed in a closed channel.
．． A refrigeration system equipped with an evaporator 4, etc. is equipped with a throttling device consisting of an expansion valve or a cavity and a re-tube 3 that expands the liquid refrigerant isothermally between the condenser 2 and the evaporator 4. A part or all of it is replaced by a refrigerant turbine 6 as shown in FIG. 2, and the power obtained by the refrigerant turbine 6 is used to promote heat exchange in the condenser and evaporator, which was conventionally performed by the electric fan motor 5. is being developed. However, although the refrigerant turbine 6 is suitable for high-speed rotation, the rotation speed of the most efficient blower is 5.
It is not suitable for practical use in the low speed rotation range of 00 to 2000 r, p, m. In addition, a reciprocating expansion engine using a pressure drop during isothermal expansion of a liquid refrigerant has not been put into practical use because the conversion mechanism for converting reciprocating motion into rotational motion is complicated and expensive.

The present invention improves the above point 0, and includes an injection nozzle that adiabatically expands liquid refrigerant, a blade wheel that rotates when collided with the injection refrigerant, and a device that extracts the rotational power of the blade wheel. 6, so that power suitable for low-speed rotation (500 to 2000'r, p, m), which is the practical rotation of the blower, can be used.

Embodiments of the present invention will be described below with reference to the drawings. In Fig. 2, a compressor 1, a condenser 2, and an evaporator 4 are provided in a closed path for refrigerant circulation, and in particular, refrigerant is sent from the condenser 2 to the evaporator 4. Figure 4(a) in the middle of the sealed channel.

As shown in FIG. 4(b), there is a closed type injection chamber 8 and the injection chamber. The injection chamber 8 consists of a bottomed cylindrical chamber cylinder 11 and a chamber lid 12 fixed to the chamber portion 11 via a sealing material 13, and a small diameter cylindrical central recess 12a is formed in the center of the chamber lid 12. be done. Further, the nozzle 1° is fixed to the chamber 11 so that its small-diameter injection port 10a opens at the upper part of the indoor side of the chamber 11. Inside the injection chamber 8 is a blade wheel 14 which rotates when the refrigerant injected from the injection nozzle 10 collides with it, and the blade wheel 14 is constructed as follows. A blade axle shaft 15 supporting the impeller 14 is supported by bearings 16 and 17, and the impeller 14 is fixed to the shaft and has a nine disc-shaped main body 18, and a number of radially fixed to the outer circumference of the main body 18 at equal pitches. It consists of packet-shaped wings 19. The device for extracting power is constructed as follows. A cylindrical drive-side magnet 21 is externally fitted into the central recess 12a with a small gap in the cylindrical support 20 fixed to the impeller body 18, and a cylindrical drive-side magnet 21 is internally fixed to the support 20. At the end of the fan shaft 24 supported via 22 and 23, there is a cylindrical driven magnet 25 that is fixedly fitted into the recess 12a with a small gap.

The driven side magnet 25 and the driving side magnet 21 constitute a non-contact joint, which prevents refrigerant leakage and eliminates the need for a shaft sealing device, which simplifies the structure and reduces costs. Furthermore, as shown in the Mollier diagram of FIG. 3, the high-pressure liquid refrigerant entering the condenser 2 undergoes an isenthalpic change to b-4pC-4e in the conventional throttle valve and capillary tube, but in the present invention, It expands in a short time and becomes an adiabatic expansion, resulting in an isentropic change. As a result, b-+c-
+d, the difference between d and e, 1; - The enthalpy of △I = Ie - Id increases, and if the amount of refrigerant circulation is G, then more energy by G·∆I can be used.

As mentioned above, the extremely low pressure liquid refrigerant injected from the nozzle 1o is
Since it has a flow velocity of 5, it collides with the packet type R19 of the impeller 14, and at that time receives the energy of the movement of the refrigerant, so the impeller 14 rotates at a low speed of about 500 to 2000 r, p, m. The low-pressure liquid refrigerant that collides with the packet blade 19 is then discharged from the injection chamber 8 into the discharge pipe 26 .

On the other hand, since the drive side magnet 21 rotates during low speed rotation of the impeller 14, the driven side magnet 25 located in the atmosphere also rotates due to the rotation of the magnetic force transmitted through the recess 12a of the chamber cover 12, and the fan shaft 24 rotates. and a condenser 77 attached to its tip.
rotates at low speed to promote heat exchange in the condenser 2. That is, the function of the conventional electric motor for the condenser 2 can be replaced by the refrigerant turbine 6.

As shown in FIG. 5, the injection nozzle 9 of the refrigerant turbine 6 is a round rod with a cut angle 11. It is possible to use a product in which a jet part 9a with an extremely small diameter and a groove part 9b with a taper are formed by polishing, but this requires precision in manufacturing such as the jet part 9a having an extremely small diameter. However, it has the disadvantage of being difficult to process. Therefore, in the present invention, as shown in FIG. 6, in place of the nozzle 9, an easily available small-diameter pipe is used as the injection part 10a of the injection nozzle, and a large-diameter steel pipe is used as the nozzle part 10b instead of the small-diameter pipe.
0 is used. The nozzle 10 is formed by cutting an easily available commercially available small-diameter pipe to an appropriate length, processing the tip of the steel pipe so that the small-diameter pipe fits therein, and fixing the small-diameter pipe and the steel pipe. This injection nozzle 10 is inexpensive and easy to process in place of the nozzle 9, which is difficult to process and expensive.

As described above, according to the present invention, the power extracted outside the refrigerant injection chamber can be used as is to rotate the condensing product fan without any speed change, so the conventional conductive type condensing product fan motor is abolished. As a result, it is possible to provide an energy-efficient refrigeration system that can achieve high energy efficiency. Moreover, the nozzle of the refrigerant turbine 6- uses a small-diameter pipe as the injection part and simply fixes it to the large-diameter nozzle part, so the structure is simple and easy to create, and it can be manufactured at low cost. In turn, the cost of refrigerant turbines can be reduced.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional refrigeration cycle, Fig. 2 is an explanatory diagram of a refrigeration cycle equipped with a refrigerant injection device, Fig. 3 is a Mollier diagram for explaining the refrigeration cycle, and Fig. 4 (b))
is a sectional view of the refrigerant turbine in the present invention, FIG. 4(b)
4(a), FIG. 5 is a sectional view showing an example of an injection nozzle, and FIG. 6 is a sectional view of an injection nozzle used in the present invention. 2: Condenser, 6: Refrigerant injection device, 7: Condensing horizontal fan,
lO: injection nozzle, 14: impeller, 19: packet type blade. Agent Patent Attorney Aihiko Fuku Figure 1 Figure 2 IdIe
If x＞ri4
1;' 1 Figure 3 Figure 6 Procedural Amendment Document February 2, 1999 ≦ Date Commissioner of the Japan Patent Office 1. Indication of matter f1 Patent Application Showa jt-101359 2. Name of the invention Refrigeration device 3. Person making the amendment Relationship to the case Patent applicant 4, agent 6, date of amendment order 6, subject of amendment 11) Column 2 for detailed explanation of the invention in the specification Contents of the amendment + 11 First page/line of the specification "Isothermal expansion" has been corrected to "expansion." (2) "Equal i expansion" from line 10 to line // on page 1 of the specification will be corrected to "expansion."that's all

Claims (1)

[Claims] 1. In the middle of the sealed channel that sends refrigerant from the condenser to the evaporator,
A refrigerant turbine is provided, which includes an injection chamber, an injection nozzle for adiabatically expanding and injecting liquid refrigerant into the injection chamber, and a blade wheel for rotating a cooling roller that is collided with the injection refrigerant from the injection nozzle. A refrigeration system characterized in that the injection nozzle of the turbine is constituted by an injection part made of a small-diameter pipe and a nozzle part having a larger diameter than the pipe and holding the small-diameter pipe at its tip.