JPS5835370A - 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 channel for circulating refrigerant.

In general, in a refrigeration system that is equipped with a compressor, condenser, evaporator, etc. in a closed flow path, the function of a throttle device consisting of an expansion valve or capillary tube that expands liquid refrigerant between the condenser and the evaporator. It is conventionally known to replace part or all of the engine with a turbine and utilize the power obtained by the turbine.

However, although turbines are suitable for operation at high speeds, the speed at which the blower is used is 500 to 20 degrees.
It cannot be put to practical use at a low rotation speed of about pm. In addition, the conversion mechanism for converting reciprocating motion into rotational motion is complicated and expensive for those that use a reciprocating expansion engine that uses pressure drop during expansion of liquid refrigerant, and the conversion mechanism for those that use a rotating vane type expansion engine is also complicated and expensive. At the same time, precision machining is required, and none of these methods have been put into practical use. Note that both the conventional turbine and both engines utilize the energy resulting from the pressure drop during adiabatic expansion of the liquid refrigerant.

Therefore, the applicant of this application filed an earlier patent application (Japanese Patent Application No. 56-3
No. 4284), an injection nozzle that injects liquid refrigerant through adiabatic expansion, an impeller that rotates when collided with the injected refrigerant, and a device that extracts the rotational power of this impeller are provided to generate power suitable for low-speed rotation. We proposed a technology that makes it possible to use it at low cost.

The present invention combines the above technology with a technology for manufacturing the impeller at an extremely low cost, and the impeller is arranged between the outer circumferential engaging portion of the disc-shaped main body and the clamping plate fixed to the main body. It consists of a number of wing legs that are clamped and fixed.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

Figure 1 is the overall configuration diagram! 4, a closed channel A for refrigerant circulation
A compressor l with a built-in electric morph, a condenser 2, and an evaporator 3 are installed, and in particular, in the middle of a closed channel A2 that sends refrigerant from the condenser 2 to the evaporator 3, there is a cross section shown in Fig. 8.4. As shown in the figure and the vertical sectional view, a closed type injection chamber 4 and an injection nozzle 5 for adiabatic expansion injection of liquid refrigerant into the injection chamber 4 are provided. The injection chamber 4 includes a bottomed cylindrical chamber portion 6 and a bottomed cylindrical chamber portion 6.
A chamber lid 8 is fixed to the chamber lid 8 via a sealing material 7, and a small diameter cylindrical central recess 8a is formed in the center of the chamber lid 8. Further, the nozzle 5 has its small diameter injection port 5a in the chamber 6.
It is fixed to the chamber part 6 so as to open at the upper part of the indoor side. Inside the injection chamber 4 is a blade wheel 9 that rotates when it is struck by the refrigerant injected from the injection nozzle 5, and the blade wheel 9 is constructed as follows. That is, both ends in the front and back direction are provided with bearings i at the center of the chamber 6 and the center of the chamber lid recess 8a.
o.

A blade axle shaft 12 rotatably supported by a blade axle shaft 11, a disc-shaped main body 18 fixed to the shaft, a large number of engaging parts 13a recessed in force local parts of the main body 13, and a plurality of engaging parts 13a fixed to the main body. A disc-shaped clamping plate 15, a large number of engaging parts 15a recessed in the outer periphery of the clamping plate 15, and a large number of packet-shaped parts engaged and sandwiched between these engaging parts 13a, 15a. It is composed of wings 14. As shown in FIGS. 5 and 6, the main body 13 and the clamping plate 15 have the same shape and are placed opposite each other, and are formed with square grooves 13b and 15b on the outer periphery by pressing a thin metal plate. Engagement parts 13a and 15a are formed with hemispherical grooves 130115C, and the blade 14 has a leg part 14 (l and As shown in FIG. 7, the container 14 is engaged with its foot portion 11 between the engaging portion 13a of the main body 13 and the engaging portion 15a of the clamping plate 15 from both sides. In this state, the main body 18 and the clamping plate 15 are fixed by spot welding at several appropriate locations C, thereby preventing the blade 14 from rotating around the foot portion 14d and from being pulled out from the main body 18. That is, a large number of blades 14 are fixed to the main body 13 at one time by welding at several locations.The means for fixing the main body 13 and the clamping plate 15 is not limited to welding, but rivets, screws, etc. can also be used.

Next, B is a power extraction device for extracting the rotational power of the impeller 9 in the injection chamber 4 to the outside of the injection chamber.

This is a cylindrical support 16 protruding from the main body 18 of the impeller 9.
and a cylindrical drive-side magnet 17 externally fitted into the central recess 8a with a small gap and internally fixed to the support body 16;
A shaft supporting plate 18 fixed to the chamber lid 8 so as to close the central recess 8a of the chamber lid 8; It is composed of a take-out shaft 21 supported via a bearing 20, and a cylindrical driven-side magnet 22 that is fitted into the central recess 8a with a small gap and externally fixed to the inner end of the take-out shaft 21. ing. The impeller 9, both magnets 17, 22, etc. are concentric, and a non-contact type joint consisting of both magnets, etc. is well known. 23 is a condenser fan fixed to the outer end of the extraction shaft 21; 24
is a refrigerant discharge pipe connected to the lower center of the injection chamber 4;
Here, 25 is an evaporator fan, and 26 is an electric motor for driving the fan.

Next, the action will be explained with reference to the % IJ El diagram in FIG. Note that points a to f in the sealed channel Al in FIG. 1 correspond to points a to f in FIG. 2, respectively. compressor l
The high-pressure gaseous refrigerant (point Ca) discharged from the saturated liquid line enters the condenser 2, where it radiates heat and becomes a high-pressure liquid refrigerant (point Cb), and then enters the injection nozzle 5, where it undergoes adiabatic expansion from the 0 point on the saturated liquid line. , and reaches point d, where it is injected into the injection chamber 4.

This state change of the refrigerant between points C and d is an isentropic change that causes the nozzle 5 to adiabatically expand in a shorter time. Note that the isothermal expansion of the refrigerant in conventional expansion devices is an isenthalpic change. Therefore, according to the present invention, an isentropic change is possible.

P increases by ∆work - θ - work d compared to the conventional device, so if the amount of refrigerant circulation is G, more energy can be used by G・∆work, and energy is used to drive the rotation of the impeller 9. Even if you consume more, the refrigeration capacity will not be inferior to the conventional one.

As described above, the low-pressure liquid refrigerant injected from the nozzle 5 has a considerable flow velocity, so this
4, and at that time, the impeller 9 receives part of the kinetic energy of the refrigerant, so the impeller 9 rotates at a low speed. After colliding with the blades 14, the low-pressure liquid refrigerant is discharged from the injection chamber 4 to the discharge pipe 24.

On the other hand, since the drive-side magnet 17 rotates due to the low-speed rotation of the impeller 9, the rotation of the magnetic force transmitted through the recess 8a of the chamber cover 8 also rotates the driven-side magnet 22 located in the atmosphere.
The condenser fan 23 rotates at low speed, and heat exchange in the condenser 2 is promoted. That is, the function of the electric motor that drives the conventional condenser fan is replaced by the impeller 9 and the power extraction device B.

In addition, the low-pressure refrigerant that has entered the refrigerant discharge pipe 24 enters the evaporator 8 and absorbs heat to become a low-pressure gaseous refrigerant.
is inhaled. The refrigerant then repeats the above circulation.

In addition, in the above, the wing 14 has its leg portion 14d connected to the square rod 1.
4b and a sphere 14C, for example, as shown in FIG. In substantially the same way as above, the wings 14 can be fixed to the main body by attaching protrusions 15d to the engaging parts 18a, 15a of the main body 18 or the clamping plate 15, which fit into the holes 14C.

As is clear from the above description, the refrigeration system of the present invention includes an injection chamber provided in the middle of a sealed flow path that sends refrigerant from the condenser to the evaporator, and an injection nozzle for adiabatically expanding and injecting the refrigerant into the injection chamber. is established.

A blade wheel that rotates when collided with the refrigerant injected from the nozzle is installed in the injection chamber, and a power extraction device is provided to take out the rotational power of the blade wheel in the injection chamber to the outside of the injection chamber. According to the invention, it is possible to use the power extracted outside the injection chamber as it is without changing the speed, for example, to rotate a condenser fan at a low speed. Therefore, it is possible to eliminate the conventional electric motor and save power consumption. A refrigeration system with high energy consumption efficiency can be provided. Further, in the present invention, the blade wheel is formed by clamping and fixing the leg portions of a large number of blades between the outer peripheral engaging portion of the disc-shaped main body and the clamping plate fixed to the main body. A large number of blades can be fixed to the main body at once by simply fixing the blade and the clamping plate at a few places, which has the excellent effect of allowing the blade wheel to be manufactured extremely efficiently and at low cost.

, 4. Brief description of the drawings The drawings show an embodiment of the present invention, and FIG. 1 is an overall configuration diagram, FIG. 2 is a Mollier diagram, and FIG. 3 is a cross-sectional view of the injection chamber. FIG. 4 is a longitudinal cross-sectional view of the injection chamber, FIG. 5 is a perspective view of the blade of the impeller, FIG. FIG. 7 is a front view of the impeller, and FIG. 8 is a perspective view of a modification of the essential parts of the impeller.

A1: Sealed channel for refrigerant circulation, A2: Sealed channel from the condenser to the evaporator, 1: Compressor, 2: Condenser, 3: Evaporator,
4: Injection chamber, 5: Injection nozzle, 9: Impeller, 12: Side axle, 18: Disc-shaped main body, 13a: Its outer periphery engaging part, 14:
Wing, 14d: Foot portion thereof, 15: Clamping plate, 15a: Outer peripheral engagement portion thereof, B: Power take-off device, 17: Drive side magnet, 21
: Extraction shaft, 22: Driven side magnet, 23: Condenser fan.

Applicant: Sharp Corporation Agent Tsunehisa Nakamura Figure 23 23 17th

Claims (1)

[Scope of Claims] An injection chamber is provided at the center of a closed channel that sends refrigerant from the condenser to the evaporator, and an injection nozzle is provided for adiabatically expanding and injecting the l-shaped refrigerant into the injection chamber. A blade wheel that rotates when collided with the refrigerant injected from the injection nozzle is installed in the injection chamber, and a power extraction device for extracting the rotational power of the blade wheel in the injection chamber to the outside of the injection chamber is provided, and the blade A refrigeration system characterized in that the vehicle comprises a plurality of wing feet that are clamped and fixed between an outer circumferential engaging portion of a disc-shaped main body and a frame sign fixed to the main body.