KR20210093038A - Refrigerant circulation piping to prevent condensation - Google Patents

Abstract

The present invention relates to a refrigerant circulation pipe for a process for preventing condensation. To this end, the present invention comprises: a pipe through which a refrigerant moves; a first insulating material wrapped around and installed in the outer periphery of the pipe; a second insulating material wrapped around and installed in the outer periphery of the first insulating material; and a casing wrapped around and installed in the outer periphery of the second insulating material.

Description

Refrigerant circulation piping to prevent condensation}

The present invention relates to a refrigerant circulation pipe used in a chiller, and more particularly, to prevent condensation from occurring on the surface of the pipe due to a temperature difference between the inside of the pipe through which the refrigerant is moved and the outside of the pipe. It relates to a pipe for refrigerant circulation for

In general, when there is a difference between the temperature of the fluid flowing inside the pipe and the outside temperature, the pipe expands and contracts repeatedly due to this temperature difference. In particular, when a cold refrigerant flows through the pipe, such as a chiller, the temperature difference with the outside of the pipe becomes severe. Condensation water is generated on the surface of the pipe.

This condensate is a liquid generated by the condensation of water vapor due to the dew condensation phenomenon, and the generation of dew water accelerates aging and damage to the pipe and its accessories. It causes overload of the compressor, which is a component, and also causes excessive power consumption.

Therefore, it is an important method of preventing condensation by using an insulating material having high resistance to the flow of cold air to prevent the transfer of cold air.

Accordingly, in the conventional pipe (A), as illustrated in FIGS. 1 and 2 , in order to prevent condensation, an insulating material 20 made of glass fiber is double wrapped around the outer periphery of the pipe 10, and the insulating material 20 ), the aluminum tape 30 is wrapped around the outer perimeter, and the casing 40 is wrapped around the outer perimeter of the outer aluminum tape 30 .

However, this conventional pipe (A) has high thermal conductivity due to high moisture absorption and moisture permeability as the insulating material 20 made of glass fiber is used, and the thermal insulation performance is not good as the cold storage holding power is lowered, and construction due to dust is difficult. There was a problem that made it uncomfortable.

Republic of Korea Patent Publication No. 10-2018-0126799 (published on November 28, 2018)

The present invention has been devised to solve the above-mentioned problems, and by installing different insulating materials on the outer periphery of the pipe through which the refrigerant moves, it is possible to prevent the generation of dew condensation in the pipe due to the effective reduction of the temperature difference inside and outside the pipe. An object of the present invention is to provide a refrigerant circulation pipe for preventing condensation.

The technical problems to be solved by the present invention are not necessarily limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

In order to achieve the object as described above, the present invention provides a pipe through which a refrigerant is moved, a first insulating material wrapped around the outer periphery of the pipe and installed, and a second insulating material wrapped around the outer periphery of the first insulating material and installed. It is configured to include a casing wrapped around the outer periphery of the second insulating material is installed.

More preferably, the first insulating material is composed of a foam material insulating material.

More preferably, the foam insulation may be composed of any one of a silica insulation material, a perlite insulation material, a polyethylene foam insulation material, a rigid polyurethane foam insulation material, or a rubber foam insulation material.

More preferably, the rubber foam insulation may be nitrile butadiene rubber or ethylene propylene rubber.

More preferably, the first insulating material has a cutout formed in the longitudinal direction so that it can be installed wrapped around the outer periphery of the pipe, and the cutout has a fitting groove formed at one end of the cutout, and the fitting groove is formed at the opposite end of the cutout. The fitting protrusion may be configured to be coupled with the fitting.

More preferably, the first insulating material may be composed of a single layer or a plurality of layers.

More preferably, the second heat insulating material may be composed of a heat insulating film or a heat insulating paint.

More preferably, the insulating film may be composed of an aluminum film or a synthetic resin film.

More preferably, the insulating paint may be applied to a thickness of 0.15 mm.

More preferably, the insulating paint may be applied in a plurality of layers.

The refrigerant circulation pipe for preventing dew condensation according to the present invention according to the above configuration has the following effects.

That is, according to the present invention, a first insulating material composed of a rubber foamed insulating material and a second insulating material composed of an insulating paint are sequentially wrapped around the outer periphery of the pipe, and then closed with a casing and composed of a pipe, thereby simplifying the manufacture and construction of the pipe. Through the use of an eco-friendly insulating material that can save energy and is eco-friendly, it is possible to effectively prevent condensation in the pipe, and has the effect of semi-permanently improving corrosion and thermal insulation performance.

In addition, since the effects of the present invention described as described above are naturally exhibited by the configuration of the described content regardless of whether the inventor is aware, the above-described effects are only a few effects according to the described content, and all effects recognized or actual by the inventor It should not be accepted as written.

In addition, the effect of the present invention should be further grasped by the overall description of the specification, and even if it is not described in an explicit sentence, a person of ordinary skill in the art to which the described content belongs through this specification has such an effect. If it is an effect that can be recognized as the effect, it should be viewed as the effect described in the present specification.

1 is a cut-away perspective view showing a pipe manufactured to prevent dew condensation in the prior art.
FIG. 2 is a cross-sectional view of FIG. 1 .
3 is a cut-away perspective view of a pipe manufactured to prevent dew condensation according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view of FIG. 3 .
5 is a photograph comparing whether or not dew water is generated on the surface of each pipe by passing a refrigerant after a pipe according to the conventional configuration is installed on one side and a pipe according to the present invention on the other side.

Hereinafter, the configuration and operation according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

This is intended to describe in detail enough to be easily implemented by those of ordinary skill in the art to which the present invention pertains, and this does not mean that the technical spirit and scope of the present invention is limited. .

In addition, in adding reference numerals to the components of each drawing, it should be noted that only the same components are marked with the same reference numerals as much as possible even though they are displayed on different drawings, considering the configuration and operation of the present invention. Therefore, the terms specifically defined may vary depending on the intention or custom of the user or operator, and the definition of these terms should be determined based on the content throughout this specification.

In addition, throughout the specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

First, the configuration of the refrigerant circulation piping for preventing dew condensation according to the present invention can be largely divided into a pipe through which the refrigerant is moved, and a first insulating material and a second insulating material and a casing that are sequentially wrapped and installed in such a pipe, The configuration of the present invention divided as described above will be described in more detail with reference to the illustrated drawings.

First, the pipe 100 is,

The refrigerant moves along the inside while having a tube diameter of a predetermined size, and as a material, SUS (stainless steel), Teflon, or cross-linked polyethylene (Cross-Linked PE) material may be used.

The first insulating material 200,

3 and 4, it is used for the insulation of the above-described pipe 100, and is installed while being wrapped around the outer circumferential surface of the pipe 100. Due to the refrigerant moving through the pipe 100, a temperature difference with the outside is generated. serves to prevent

The first insulating material 200 may be preferably composed of a thermal insulation material of a foam material (Closd Cell), and a silica thermal insulation material, a Perlite thermal insulation material, a polyethylene thermal insulation material, and a hard urethane foam (Polyurethane) insulation material are used. And, more preferably, it may be a foam rubber insulating material.

Here, the silica insulating material is a crystalline form (Tobermorite) calcium silicate obtained by high pressure steam curing by adding diatomaceous earth, slaked lime, and reinforcing fibers. It has low conductivity (0.047) even at high temperature, so it has excellent insulation effect, has excellent heat resistance due to its stable crystal structure, hardly deforms even after long-term use at high temperature, is completely incombustible as an inorganic insulation material, and is light and strong. It is characterized by easy construction.

And when lava ejected from volcanic activity abruptly solidifies in water, etc., it becomes a glassy rock without a gap to become a crystalline mineral, and by crushing such a glassy igneous rock, it is dried and heated under certain conditions (above 1000℃). ), it expands to about 30 times the size of frying corn, and it is made by a special manufacturing method by mixing the hollow or light swells on the cell with various additives, and the operating temperature range is about -250℃ ~ 1000 It has the widest safe use temperature range as a thermal insulation material at ℃, has a unique thermal insulation performance with delicate porous foam, does not burn with incombustible minerals as fuel, has excellent water repellency, and has excellent water repellency. Because it contains a large amount of sodium silicate component, which is a corrosion control agent, it exhibits excellent effects in preventing stress corrosion cracking of stainless steel piping and equipment and corrosion protection of general carbon steel. There is no shrinkage within the safe operating temperature range, and cooling Since it is restored to its original state and joined again, it responds to the thermal elongation of the pipe to be joined, so there is almost no heat loss due to a gap in the seam even after using it for a long time.

In addition, the polyethylene insulation material is a semi-rigid foam in the form of a chemically crosslinked and foamed sheet of polyethylene, and has a working temperature range of -25 ° C to 80 ° C. Seams and gaps and cracks may occur due to contraction and expansion occurring during the heating cycle, and these problems may be the main cause of condensation and loss of heat. It has the property to melt quickly.

In addition, the rigid polyurethane foam insulation uses polyurethane foam, a synthetic resin produced by the reaction between polyisocyanate and active hydrogen-containing substances such as polyols, as a polymer with urethane bonds. R, a Freon gas with low thermal conductivity, has a variety of finishing methods, has excellent light weight, is easy to use at low temperatures with a temperature range of approximately -190°C to 100°C, and is widely used due to its excellent strength. It is a material foamed with -11 and R-12 and polymer, which shows excellent thermal insulation properties. Although it is not a non-flammable material, it has flame retardant properties, is easy to transport and handles, and has strong self-adhesive properties.

In addition, the rubber foam insulation is eco-friendly, has low thermal conductivity and is stable, so it has excellent initial insulation performance. Multiple layers of vapor barrier films are formed in the form of independent bubble structures, so the water absorption rate is low and moisture permeability is excellent, so the insulation retention is maintained for a long time. In case of fire, flame does not spread, smoke density is low, there is almost no toxic gas emission, shows excellent flame retardant performance due to high oxygen index, and is widely used with a temperature range of about -184°C to 105°C, and is physically and chemically stable. Since there are almost no chlorine and ammonia components, it does not corrode the body to be insulated, and it is easy to handle due to its excellent flexibility and elasticity. there is this

In addition, rubber foam insulation is widely used for heat loss, corrosion prevention of equipment, and prevention of dew condensation, and foam materials can be divided into two types.

In other words, it is a foamed material of the most commonly used nitrile butadiene rubber (NBR: Nitrile butadiene rubble) and ethylene propylene rubber (EPDM: Ethylene Propylene Diene Monomer), which is more secure in cold resistance, heat resistance, water resistance, and weather resistance. can be classified by material.

The first insulating material 200 is configured in a cylindrical shape having an inner diameter corresponding to the outer diameter of the pipe in order to be wrapped and installed along the longitudinal direction of the aforementioned pipe 100, and is configured in a cylindrical shape and fitted around the outer circumference of the pipe 100 It can be installed, and if necessary, a cutout is provided along the longitudinal direction, so that it can be easily installed on the outer periphery of the pipe 100 using this cutout.

The first insulating material 200 is installed wrapped around the outer periphery of the pipe 100, and is composed of a single layer having a predetermined thickness or a plurality of thin layers, so that a single layer is used according to the user's intention, conditions and environment, or It is also possible to use a plurality of plies in a selected number.

The first insulating material 200 is composed of a plurality of layers, and the plurality of layers are spaced apart from each other without being in contact with each other, or a heating means such as a film heater may be provided between the layers.

The cutout of the first insulating material 200 is divided into two to form a fitting groove at one end opposite to the one. At the other end, by configuring a fitting protrusion so that it can be fitted and fixed in such a fitting groove, the cutout of the first insulation material 200 wrapped in the pipe 100 does not open by coupling the fitting protrusion and the fitting groove. A phenomenon in which the thermal insulation effect is lowered due to the widening of the portion can also be prevented.

The second insulating material 300,

As illustrated in FIGS. 3 and 4 , it is wrapped around the outer periphery of the first insulating material 200 and further improves the thermal insulation effect of the pipe 100 together with the first insulating material 200, so that condensation on the pipe 100 This prevents the number from being generated.

The second insulating material 300 may be installed, for example, by being wrapped around the outer periphery of the first insulating material 200 wrapped in the pipe 100 by being made of an insulating film.

Here, the insulating film may be fixed by being adhered to the outer periphery of the first insulating material 200 in a state in which the adhesive is applied to the entire inner surface, and after the adhesive is applied to one or both of both ends, the first insulating material 200 In a state wrapped around the outer periphery, a portion of both ends may overlap each other and be adhesively fixed.

The second insulating material 300 is preferably composed of an insulating paint and may be applied to the outer periphery of the first insulating material 200 wrapped in the pipe 100 .

Insulation paint can be applied to a thickness of about 0.15mm, and when the thickness is less than 0.15mm, the insulation effect may be reduced, and when the thickness exceeds 0.15mm, the material consumption increases and the cost increases. can be

The insulating paint may be applied in one layer on the outer periphery of the first insulating material 200, and may be composed of a plurality of layers if necessary.

These insulating paints are composed of ceramic particles with fine pores to block noise and prevent dew condensation, improve moisture permeability and thermal conductivity to provide excellent thermal insulation, do not generate toxic gas in case of fire, and use inorganic materials for the human body. It has no effect on the environment and can be used in an environment-friendly way.

The casing 400 is

As illustrated in FIGS. 3 and 4 , the first insulating material 200 surrounding the outer periphery of the aforementioned pipe 100 is wrapped around the second insulating material 300 and installed, and the material is flame-retardant polyvinyl chloride. (FRPVC).

In the pipe (B) of the present invention configured as described above, a rubber foam insulation material is wrapped around the outer circumference of the pipe 100 with a first insulation material 200, and the second insulation material 300 is insulated on the outer circumference of the rubber foam insulation material. After the paint is applied, it is closed by the casing 400 , thereby making it easy to manufacture the pipe (B) and effectively preventing dew condensation on the surface of the pipe (B).

[Experimental example]

Table 1 below shows the configuration of the present invention in which the first insulating material 200 and the second insulating material 300 are sequentially wrapped in the pipe 100, and the casing 400 is wrapped around the outer periphery of the second insulating material 300. Condensation phenomenon of the pipe (A) according to the conventional configuration in which the pipe (B) and the pipe (10) are wrapped with the glass fiber insulating material (20) and the aluminum tape (30) and the casing (40) is wrapped on the outside It was measured by comparison under the condition of -20 °C through a simulation test.

test subject Conventional piping (A) Piping (B) of the present invention
surface temperature
(℃)
12.6℃

17.2℃

4.6℃
Difference
condensed water
Occurrence
Condensation water

No condensation

Visual inspection

see photo

As can be seen from Table 1 above, as a result of visually judging whether or not condensation occurred in both of them through this experiment, condensation occurred on the surface of the pipe (A) according to the conventional configuration as shown in FIG. 5, but the configuration of the present invention It was confirmed that the pipe (B) according to Fig. 2 did not show any condensation, and it was confirmed that the presence of such condensation was shown through the difference in surface temperature between the two.

Of course, in the detailed description of the present invention as described above, it is possible to form a description of a specific embodiment. Therefore, the scope of the described content does not need to be limited to the described embodiments, and should be defined by the claims described below as well as the claims and equivalents.

100: pipe 200: first insulating material
300: second insulating material 400: casing

Claims (10)

a pipe 100 through which the refrigerant is moved;
a first insulating material 200 wrapped around the outer periphery of the pipe and installed;
a second heat insulating material 300 wrapped around the outer periphery of the first heat insulating material and installed; and
a casing 400 that is installed and wrapped around the outer periphery of the second insulating material;
Refrigerant circulation piping to prevent condensation from being included. The method of claim 1,
The first insulating material 200,
Refrigerant circulation piping to prevent dew condensation, which is composed of foam insulation. 3. The method of claim 2,
The foam insulation material,
Refrigerant circulation piping for preventing condensation which is any one of silica insulation or perlite insulation, polyethylene foam insulation, rigid urethane foam insulation, or rubber foam insulation. 4. The method of claim 3,
The rubber foam insulation,
Refrigerant circulation piping for preventing condensation in which nitrile butadiene rubber (NBR) or ethylene propylene rubber (EPDM) is used. The method of claim 1,
The first insulating material 200,
A cutout is formed in the longitudinal direction so that the pipe 100 can be wrapped around the pipe 100 and installed,
Refrigerant circulation pipe for preventing condensation in which the cut-out portion has a fitting groove formed at one end of the divided portion, and a fitting protrusion is configured to be fitted with the fitting groove at the other end of the cut-out portion. The method of claim 1,
The first insulating material 200,
Refrigerant circulation piping for preventing dew condensation that is composed of one layer or a plurality of layers. The method of claim 1,
The second heat insulating material 300,
Refrigerant circulation pipe to prevent dew condensation, which is composed of insulating film or insulating paint. 8. The method of claim 7,
The insulating film is
Refrigerant circulation pipe to prevent condensation, which is composed of aluminum film or synthetic resin film. 8. The method of claim 7,
The insulating paint is
Refrigerant circulation pipe to prevent condensation, which is applied with a thickness of 0.15mm. 8. The method of claim 7,
The insulating paint is
Refrigerant circulation pipe for preventing dew condensation that is applied in a plurality of layers.

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