JP2975855B2 - Dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a refrigeration cycle in a refrigeration system such as a refrigerator or an air conditioner, and removes refuse, sludge, moisture and the like so that refrigerant and lubricating oil circulating in the refrigeration cycle do not deteriorate. It relates to a dryer for adsorption and removal.

[0002]

2. Description of the Related Art A refrigeration system has a refrigeration cycle formed by sequentially connecting a pressure reducing device such as a compressor, a condenser and a capillary tube and an evaporator with piping. Circulates, and the lubricating oil accumulated in the compressor partially circulates with the refrigerant.

It is ideal that only the refrigerant and the lubricating oil circulate in the refrigeration cycle. However, in actuality, with the manufacture, service, and maintenance of the refrigeration system, dust or moisture may enter from outside, or the compression may occur. During the operation of the machine, sludge and acid are generated, and these flow out to the refrigeration cycle.

Therefore, conventionally, in order to remove these foreign substances and impurities, a removing device such as a strainer, a dehydrator or a dryer is arranged in the piping of the refrigeration cycle, for example, between the condenser and the capillary tube, and the refrigerant and the lubricating oil are removed. To prevent deterioration of the compressor, prevent the refrigeration cycle from clogging and reduce the cooling capacity, and ensure that the compressor is lubricated and driven.

[0005] By the way, a dryer 1 having a structure as shown in FIG. 5 is conventionally used as a device for removing foreign matter and the like. That is, a steel case 4 having an inlet pipe 2 and an outlet pipe 3 for the refrigerant, and an active alumina and a molecular sieve as main components, an adhesive is added thereto, and the mixture is solidified into a cylindrical shape and molded. 4 includes an adsorbent 5 loaded in the case 4 and a coil spring 6 which urges the adsorbent 5 against one side with an elastic force so as not to move in the case 4.

A spring 6 is disposed on the inlet side of the dryer 1 to fix the adsorbent 5 by utilizing the fluid force of the refrigerant. When the refrigerant flows through the dryer 1, it passes through the adsorbent 5 as shown by the arrow, and adsorbs and removes water, sludge, dust, acid, and the like.

[0007]

However, since the discharged refrigerant flowing through the refrigerant cycle when the compressor is operated is subjected to large pressure and pulsates, the adsorbent is pressed and fixed in the case by the coil spring. However, in this conventional structure, the adsorbent vibrates due to the flow force of the refrigerant and rubs against the case, causing the surface of the adsorbent to wear, break, and generate particulates. In addition, the adsorbent vibrates even when the pipe itself vibrates in the operation of the refrigeration cycle, and similarly, powder particles are generated.

[0008] The powdery material thus generated flows out of the dryer and becomes clogged in a capillary tube or other small tube portion of the refrigeration cycle, causing a problem that the cooling operation is hindered.

Further, in the case of a reversible refrigeration system capable of performing cooling and heating, such as a heat pump, a gaseous refrigerant having a higher flow force than the liquid refrigerant flows in the dryer in the opposite direction. At that time, the vibration of the adsorbent is further increased, and a larger amount of powder is generated, so that this problem becomes more serious.

Further, the conventional dryer requires high quality, such as selecting a coil spring having a certain elasticity, or incorporates it, which is disadvantageous in terms of manufacturability and cost. There has been a problem that the elasticity of the coil spring is weakened due to aging due to long-term use, and stable holding and fixing of the adsorbent cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made so that an adsorbent can be completely and easily fixed in a case so as to produce a powdery or granular material that clogs a refrigeration cycle. It is an object to provide an improved dryer that does not look.

[0012]

According to the present invention, there is provided a refrigeration cycle including a compressor, a condenser, a decompression device, and an evaporator, which is provided in the middle of a refrigeration cycle. In a dryer that adsorbs and removes foreign substances and impurities, it is made of an adsorbent whose powdery adsorbent material is solidified in a cylindrical shape and whose outer peripheral surface is formed in an irregular shape, and a metal that becomes a casing that covers the adsorbent. A cylindrical body that is deformed along an irregular surface of the adsorbent by electromagnetic forming and fixed to the adsorbent, and a refrigerant inlet pipe is provided at one end of the cylindrical body. Is formed by forming a refrigerant outlet pipe at the other end.

[0013]

The powdery adsorbent material is solidified to form a cylindrical adsorbent having an irregular outer surface. The adsorbent is housed in a metal cylinder made of a metal plate such as aluminum or copper serving as a casing, and subjected to an electromagnetic molding method. As a result, the metal cylindrical body is deformed and fitted along the irregularities of the adsorbent, so that the adsorbent is firmly fixed to the casing, and the adsorbent is caused by the flow force of the refrigerant circulating in the cooling operation or the vibration of the piping. There is no need to worry about vibrations, and the phenomenon of pulverization of the adsorbent that clogs the refrigeration cycle is effectively prevented.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a refrigeration cycle of a refrigerator, in which gas refrigerant discharged from a compressor 11 is liquefied in a condenser 12, then reduced in pressure in a capillary tube 13, and then cooled in an evaporator 15 provided in the refrigerator 14. It evaporates, cools the interior 16 with the latent heat of evaporation at that time, and circulates through the refrigeration cycle 18 so that the evaporated gas refrigerant is sucked into the compressor 11, while the condenser 12 and the evaporator 15 A dryer 1A is arranged between them.

The compressor 11 accommodates a motor element 19 in a lower part of the compressor case, and a reciprocating compressor element 20 in an upper part thereof.
9 to suck, compress, and discharge the refrigerant.

Further, by the operation of the compressor 11, the lubricating oil 21 stored in the oil reservoir at the lower part of the compressor case is sucked up, and the movable parts of the motor element 19 and the compressor element 20 are lubricated. Returns to the oil sump, but some lubricating oil circulates with the refrigerant in the refrigeration cycle.

The above-described dryer 1A is manufactured by a manufacturing method called an electromagnetic forming method in the present invention so that the adsorbent 5A can be integrally fixed to a metal casing 4A.
The structure is as shown in FIG. What is electromagnetic molding?
As shown in the principle diagram of FIG. 3, the electric charge from the capacitor 26 is instantaneously discharged by the switch 27 to the molding coil 25 to flow a pulse current, thereby forming a strong electromagnetic field.
By placing a molded object, for example, a cylindrical metal body 28 in this magnetic field, the metal body and the magnetic field that generate a magnetic field by electromagnetic induction act as magnets of the same polarity and repel,
The metal body 28 is formed using this repulsive force.

FIG. 4 shows a concrete processing example, in which a core body 30 having an uneven surface 29 formed on the outer peripheral portion is arranged in a cylindrical metal body 28a, and an outer forming coil 25a is interposed between the core body 30 and the coil 30a. When electromagnetic molding is performed with the pressing body 31 interposed therebetween, the pressing body 31
Deforms the metal body 28a so as to bite into the uneven surface 29 of the core 30 to form a structure 32 as shown on the right side of the figure in which the metal 28a and the core 30 are integrally fixed.

Accordingly, as the casing 4A of the dryer 1A, a metal cylindrical body 4B made of a magnetic metal which is softer than iron such as aluminum or copper and is easy to process is used, while an adhesive is mixed with activated alumina and molecular sieve. The adsorbent 5A manufactured by molding into a cylindrical shape has corrugated uneven portions 3 on its outer peripheral surface.
5 are integrally formed. Then, the adsorbent 5A is accommodated and arranged in the center of the metal cylindrical body 4B, and is formed by using the electromagnetic forming method shown in FIG.

As a result, the metal cylinder 4B is attached to the adsorbent 5A.
Thus, the casing of the dryer 1A that can be completely fixed to the adsorbent 5A by being deformed along the corrugated portion 35 having the above-mentioned waveform and firmly fixed to the adsorbent 5A is obtained.

Thereafter, a process of narrowing both ends of the casing 4A to a small diameter or the like is performed, so that the outlet pipe 3 for connection of the inflow and outflow of the refrigerant is formed.
6a and 36b are formed. The adsorbent 5A is a molded product having mechanical strength enough to withstand the pressing force of the metal cylindrical body 4B which is subjected to the deformation pressure by the electromagnetic molding.

Thus, the adsorbent 5A is formed by the electromagnetic molding method.
The dryer 1A which can be securely fixed to the casing 4A can be easily manufactured. In the completed dryer 1A, the adsorbent 5A does not vibrate due to the flow force of the refrigerant. Nothing is formed.

Further, the coil spring 6 can be dispensed with, and the mouth pipes 36a and 36b at both ends of the dryer 1A can be used in common without distinction between the inlet and the outlet. Yes, connection work efficiency can be improved.

[0025]

As described above, according to the present invention, a dryer for removing debris, sludge, water and the like in a refrigeration cycle to prevent deterioration of refrigerant and lubricating oil is provided on the outer periphery of an adsorbent as a main component thereof. While the surface is formed in an irregular shape, a metal cylindrical body containing the adsorbent is fitted to the irregular surface by an electromagnetic molding method so that the adsorbent is securely fixed. Thus, there is no fear that the adsorbent will vibrate, and the problem that the granules formed by damage from the conventional adsorbent are clogged in the refrigeration cycle and the cooling capacity is reduced can be surely solved.

In addition, a conventional spring or the like which presses and fixes the adsorbent is not required, so that the number of parts can be reduced and the productivity can be improved. Efficient connection work can be performed.

[Brief description of the drawings]

FIG. 1 is a refrigeration cycle diagram of a refrigerator as an example of a refrigeration apparatus.

FIG. 2 is a structural view of a dryer according to the present invention manufactured by an electromagnetic forming method.

FIG. 3 is a principle view of an electromagnetic forming method used in manufacturing the dryer of the present invention.

FIG. 4 is a view showing an example of a specific working example formed by the electromagnetic forming method.

FIG. 5 is a structural view of a dryer formed by a conventional manufacturing method.

[Explanation of symbols]

 1A Dryer 4A Casing 5A Adsorbent 35 Irregularities 36a, 36b Mouth tube

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F25B 43/00

Claims (1)

(57) [Claims] 1. A refrigeration cycle comprising a compressor, a condenser, a decompression device, and an evaporator, which is provided in the middle of a piping of a refrigeration cycle and adsorbs and removes foreign matter, impurities such as dust, sludge, and moisture in the refrigeration cycle. In the dryer, the powdery adsorbing raw material is solidified into a cylindrical shape, and an adsorbent body having an outer peripheral surface formed in an irregular shape, and a cylindrical body formed of a metal serving as a casing covering the adsorbent body, The cylindrical body is deformed along the irregular surface of the adsorbent by electromagnetic forming method and is fitted and fixed to the adsorbent, and a refrigerant inlet pipe is provided at one end of the cylindrical body and a refrigerant outlet is provided at the other end. A dryer manufactured by forming tubes.