JP2562725Y2 - Dryer for refrigeration equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desiccant used for removing water from a refrigerant in a refrigeration system.

[0002]

2. Description of the Related Art FIG. 2 is a system diagram of a conventional low-temperature refrigerator (however, it is also used as a diagram of the embodiment), 1 is a refrigerant circulation piping, 2 is an accumulator, 3 is a compressor, and 4 is a condenser. ,
5 is a dryer filled with a desiccant therein, and 6 is an evaporator.

The dryer 5 is used to absorb and remove the water content of the refrigerant, and is used in a low-temperature refrigerator.

That is, conventionally, in a refrigerating apparatus for circulating a refrigerant, R22 (CHC1F ₂ ) is used as a refrigerant for air conditioning, and a refrigerating system is not equipped with a desiccant since the refrigerating temperature is not extremely low.

On the other hand, in a low-temperature refrigerator, R12 (C
C1 ₂ F ₂₎ using, because the effect of water concentration in the system since the freezing temperature is significantly lower dividing remarkably table drier 5 filled with desiccant as shown in Figure 2
Attach.

[0006] Conventionally, the drying
Agent3The shape was as shown in FIG. That is,3
(A) is an example in which the granular desiccant 8 is filled.3(B)
Opens the blind tube desiccant 9 which is formed by compressing a moisture absorbent (desiccant).
This is an example in which the mouth is stored with the mouth facing upward.

[0007] Reference numeral 7 denotes a strator, and 10 denotes a refrigerant / partial oil path passing through the blind cylinder type desiccant 9.

[0008]

The conventional desiccants for refrigeration systems have the following problems to be solved.

That is, the refrigerating apparatus utilizes the complete closed loop circulation of the refrigerant, but water is introduced into the refrigerant circulation system in the manufacturing process as follows.

[0010] The routes for bringing in moisture include (1) moisture in the refrigerant for filling, (2) moisture in the refrigerating machine oil for filling, and (3)
Quality control and work to minimize mixing of the water during the manufacture and installation of the refrigerator due to the possibility of undegased air and water in the pipe and (4) residual or adhered water to the pipe inner wall. We take measures such as manuals.

However, at present, a small amount of water cannot be avoided, and therefore, as described above, a desiccant for adsorbing the mixed water is provided in the low-temperature refrigerator as described above. or,
As described above, no desiccant is installed for air conditioning.

If a large amount of water is present in the circulation,
In the low-temperature part of 0 ° C. or lower, the circulating moisture freezes and blocks the refrigerant circulation pipe, resulting in insufficient cooling capacity, burning of the compressor, and the like.

[0013] When a large amount of water is present, oil degradation is accelerated by reaction with refrigerating machine oil.

Although it is a desiccant used to prevent these inconveniences, when this desiccant absorbs a part of the moisture brought into the circulating system in the initial stage, the circulating moisture becomes small in the system and the role of the desiccant thereafter Is over.

This period is considered to be about two weeks from the start of operation. Therefore, the function of the desiccant becomes unnecessary since no water is brought in thereafter. On the other hand, the presence of a large amount of desiccant in the passage often causes a problem after a long time has passed. For example, the deterioration of the refrigerating machine oil due to clogging in the desiccant filling portion due to abrasion powder or the catalytic action on the surface of the dryer, and the deterioration in performance due to the adsorption of the additive, etc.

On the other hand, even in a refrigeration system for air conditioning to which no desiccant is installed, there is a case in which a large amount of water is mixed into the system due to the above-mentioned defective quality control or the like. In such a refrigerator, if the moisture content is higher than the saturated water of the oil or the refrigerant (free water is generated), the oil will deteriorate, the capillary will be clogged, and the long-term stable operation will be difficult. Therefore, when a small amount of desiccant is used for air-conditioning, the above-mentioned problem caused by moisture is eliminated.

That is, the conventional desiccant tends to cause clogging of the pipeline, and the desiccant tends to cause deterioration and poor lubrication of the refrigerating machine oil due to the catalytic action and adsorption of additives. Had a problem.

[0018] In addition, due to such a problem, there is a problem that the use of a desiccant must be abandoned in an air conditioner in which it is clear that a suitable effect can be obtained.

The present invention solves the above problems by obstructing a pipeline,
An object of the present invention is to provide a desiccant for a refrigerating apparatus that does not cause a problem such as deterioration of a refrigerating machine oil.

[0020]

Means for Solving the Problems The present invention solves the above problems.
The means to be the gist of this is that the refrigerant
In the liquid line piping of the refrigerant circuit
In the dryer for the refrigeration equipment that is detachably mounted,
Refrigerant circulation pipes are formed at both ends which are cylindrical and sealed.
Are connected and formed so that the outer diameter is longer than the length along the axial direction.
Cylindrical container and the same axial direction inside the cylindrical container.
It is housed with dimensions corresponding to the length and inner diameter along
A through hole with a diameter larger than the inner diameter of the refrigerant circulation pipe in the core
Donut-shaped solid desiccant with compression
And the hermetic container is hermetically filled with the desiccant.
Is to become .

Here, the term "cylindrical" includes a case where the length in the axial direction of the cylinder is sufficiently shorter than the diameter, such as an annular shape or a hollow disk shape. In addition, the “refrigeration device” includes a so-called cooling device for air conditioning and the like.

[0022]

The present invention has the following operation since it is configured as described above.

That is, since the desiccant interposed in the flow path of the refrigeration apparatus forms a cylinder having an inner diameter larger than the inner diameter of the pipe, the desiccant does not hinder the flow in the flow path.
Abrasion powder and the like in the system do not cause clogging and blockage of the flow path (pipe) does not occur. Therefore, pressure loss is also small.

Further, since the desiccant has a cylindrical shape that does not collapse by the refrigerant, the chance of contact with the oil in the refrigerant is small, and there is very little concern that the refrigerating machine oil will deteriorate due to its catalytic action.

Also, for the same reason, there is little concern because the additives in the refrigerating machine oil are adsorbed and the performance of the refrigerating machine oil is reduced. Furthermore, the outer diameter of the cylindrical dryer
The axial length is sufficiently small (outer diameter> axial length)
And the desiccant was formed into a donut shape
Easy installation and removal of the dryer and desiccant
As well as compressing the desiccant itself into a donut shape.
Solids that can be handled as such
Can be filled into the dryer as it is
You .

[0026]

Example of Embodiment of the present invention will be described with reference to Figures 1-2.

FIG. 2 is a system diagram of a low-temperature refrigerator common to the conventional example, which is the same as the conventional example except that the desiccant of the embodiment is housed inside the dryer 5. However, the actual
In the embodiment, not only a low-temperature refrigerator but also a cooling device for air conditioning are used in exactly the same manner, so that the description for the air conditioning is omitted. Therefore, the following explanation is for the dryer 5
Perform only for the part.

FIG. 1 is a view of an embodiment of the present invention , in which (a) is a longitudinal sectional view (however, the annular desiccant 11 is not longitudinally cut), and (b) is a sectional view taken along the line BB of (a). It is.

In FIG . 1, reference numeral 1 denotes a refrigerant made of a metal material.
The circulation system piping 5 is interposed in the middle of the refrigerant circulation system piping 1.
It is a cylindrical dryer. This dryer 5 is shown in FIG.
As shown in the figure, the axial length is shorter than the outer diameter
(That is, outer diameter> length in axial direction)
Both sides of the outside of the tube 1 are closed and a closed circle
It is composed of a cylindrical body. 11 is the above-mentioned closed cylindrical body
Compression molding into the dryer 5 consisting of
A ring-shaped desiccant stored and stored. The desiccant 11
The inner diameter of the inner circumference (through hole) 12 is the same as that of the refrigerant circulating system pipe 1.
Forming at sufficiently large donut-shaped solid form than the inner diameter of
Have been .

Next, the operation of the above configuration will be described. First, the inner diameter of the desiccant inner circumference 12 of the annular desiccant 11 is sufficiently large as described above with respect to the refrigerant flowing in the refrigerant circulation system pipe 1 as shown by the arrow, so that the heat absorbing action is continuously performed. However, the annular desiccant 11 does not cause any line resistance in the refrigerant circulation system piping 1 or more, and the desiccant inner periphery 12 is merely the inner periphery of a hollow through-hole, so that a narrow portion for retaining wear powder and the like is provided. As a result, there is no clogging or unevenness, so that abrasion powder and other foreign matter do not block and block the flow path, and do not cause large pipeline resistance.

Further, since the annular desiccant 11 has a simple annular shape, the refrigerant smoothly flows through the inner periphery 12 of the desiccant and has a low rate of permeating through the flesh. The rate of refrigerating machine oil degradation due to its catalysis is also very slow and negligible.

Further, for the same reason, the degree of adsorbing the additive in the refrigerating machine oil is very slow, and the decrease in circulation performance due to the adsorption is limited to a negligible range. In addition, the cylindrical door
The axial length with respect to the outer diameter of the lier 5 is sufficiently small.
(Outer diameter> axial length) and the desiccant 11
Since it was formed into a donut shape as above, the dryer
5 and desiccant 11 can be easily installed and removed
In addition, the desiccant 11 itself is compressed into a donut-shaped solid
That can be handled as
It can be filled in the dryer 5 in a state .

The annular desiccant 11 is made, for example, by compressing a hygroscopic agent and does not collapse in a refrigerant.

The results of a field test performed using the low-temperature refrigerator will be described below.

A refrigerator having a refrigerating capacity of about 4000 kcal / Hr was used.

In the low-temperature refrigerator shown in FIG. 2, the refrigerant is R-12.
(CC1 ₂ F ₂ ) was used, and about 3 g of the desiccant described in the above example was installed.

After charging the oil and the refrigerant, the operation was started after measuring the respective moisture concentrations. After the operation was performed for 100 hours and 1000 hours, the refrigerant and the oil were sampled and measured.

[0038]

[Table 1]

According to Table 1, it is possible to remove water in refrigerant and oil with about 3 g of desiccant (0.6 liter of oil at filling, 2 kg of refrigerant)
Therefore, no trouble occurred even during long-time operation.

In the conventional 1000 hr durability test, an initial phenomenon of a defect due to the attachment of abrasion powder to a desiccant and a decrease in lubricity due to adsorption of an additive were observed. Occasionally, the above-mentioned problem was not observed at all.

[0041] As described above, according to this embodiment, the annular desiccant 11 has a desiccant inside the periphery 1 2 of the large diameter sufficiently than the inner diameter of the refrigerant circulatory system pipe 1, with foreign matter such as abrasion powder Since there is no clogging and the refrigerant does not forcibly pass through the fleshy material of the annular desiccant 11, deterioration of the refrigerating machine oil due to the catalytic action does not occur, and the lubrication performance decreases due to the adsorption of additives. There is a variety of advantages that no occurrence occurs.

Further, due to such advantages, there is an advantage that the air conditioning efficiency can be improved by being used in a cooling device for air conditioning which has not been used conventionally.

[0043]

[Effects of the Invention] The present invention has the following effects because it is configured as described above.

That is, in the present invention, since the desiccant is formed into a cylindrical shape having a large inner diameter, the flow passage is not easily blocked, and the adsorption of the additive of the refrigerating machine oil is reduced, so that poor lubrication and other performance deterioration do not occur. . Therefore, the operation cost of the refrigeration system is reduced.

Further, the present invention can be easily applied to a normal air conditioning system, and the occurrence of a malfunction of the air conditioner due to the inclusion of water is eliminated.

As a result, the durability of the refrigeration system is improved, and the failure rate is significantly reduced. Also, the above cylinder
Length in the axial direction with respect to the outside diameter of the dryer
As well as forming the desiccant into a donut shape
It is easy to install and remove the dryer and desiccant.
And the desiccant itself is compressed into a donut shape.
Can be handled as a solid, such molded
It can be filled into the dryer as it is,
Handleability is improved.

[Brief description of the drawings]

FIG. 1 is a view of an embodiment of the present invention , wherein (a) is a longitudinal sectional view (however, only the annular desiccant 11 is shown without being broken), and (b) is a sectional view taken along the line BB of (a). FIG.

FIG. 2 is a system diagram of a conventional low-temperature refrigerator also serving as a low-temperature refrigerator according to an embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a usage state of a conventional desiccant,
(A) is a view of a granular desiccant, and (b) is a view of a blind desiccant.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Refrigerant circulation piping 5 Dryer 11 Annular desiccant 12 Inner circumference of desiccant

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Claims (1)

(57) [Scope of request for utility model registration] 1. A refrigerant is circulated in a metal pipe.
Chilled removably interposed in the liquid line piping of the refrigerant circuit
In the dryer for the refrigeration equipment, it is cylindrical and sealed.
Refrigerant circulation pipes are connected to both ends, and the outer diameter is
A cylindrical container formed longer than the length along the
Equivalent to the axial length and inner diameter of this inside a cylindrical container
The refrigerant circulation pipe is housed in the central part.
Donut with a through hole with a diameter larger than the inside diameter of the
A cylindrical desiccant comprising a shrink-formed solid desiccant,
Characterized in that the desiccant is hermetically filled inside
Dryer for freezing equipment .