KR20040072806A - Functional refrigerant composition and injection method of the same - Google Patents

Abstract

PURPOSE: Provided is a functional coolant composition containing a coolant and a frozen lubricant, which is carried easily and delays and prevents the leakage of the coolant and can seek out the leakage parts of the coolant. A simple method for injecting the functional coolant composition is also provided. CONSTITUTION: The functional coolant composition contains: 100pts.wt. of the coolant such as HFC, HCFC, CFC, or HC; 0.5-30pts.wt. of the frozen lubricant selected from the group consisting of a mineral oil, an alkyl benzene oil, a polyester oil, a polyalkylene glycol oil, and a polyvinylester oil; additionally 0.1-10pts.wt. of a leakage preventing agent or a leakage identifying agent. And the functional coolant composition is injected into a refrigerator by the container unit with a capacity of 50-2000g.

Description

Functional refrigerant composition and its method of injection {FUNCTIONAL REFRIGERANT COMPOSITION AND INJECTION METHOD OF THE SAME}

[Industrial use]

The present invention relates to a functional refrigerant composition and a method for injecting the same, and more particularly, includes both a refrigerant and a refrigerated lubricant, so that the refrigerant and the frozen lubricant can be simultaneously injected in a single charge and the injection method is simple, and the filling container thereof Functional refrigerant composition which can be manufactured in various volumes and is not only easy to carry, but can further include an anti-leakage agent or a leak check agent, which delays refrigerant leakage, prevents refrigerant leakage, and facilitates identification of the refrigerant leakage site. It relates to a method of injection thereof.

[Prior art]

Refrigerants used in refrigerators, such as refrigerators and air conditioners, are the working fluids of the refrigeration cycle and are a general term for a medium that takes heat from a low temperature object and transfers heat to a high temperature object.

The conditions to be provided as a refrigerant are evaporated at a pressure above atmospheric pressure and liquefied at a relatively low pressure at room temperature even at a low temperature, low power consumption for the same freezing capacity, high critical temperature, low solidification temperature, large heat of evaporation, and specific heat of liquid. It is small and the ratio of liquid specific heat to evaporation heat is small, and the volume of refrigerant gas is small and the chemical bond is good for the same refrigerating capacity, so that even if the refrigerant gas is decomposed by compressed heat, it does not generate any gas other than refrigerant gas. It must be low in viscosity, good in thermal conductivity, flammable and non-explosive, not harmful to the human body and odorless, easy to detect if leaked, and inexpensive.

Examples of the widely used refrigerants include ammonia, fluorinated hydrocarbon chloride refrigerants, azeotropic mixed refrigerants, chloromethyl, and the like. However, it is important to select and use a refrigerant suitable for each characteristic according to the application field, the capacity of the refrigerator, the type of the compressor, and the use of the refrigerant.

The refrigerant widely used in the refrigerating apparatus of automobiles is a fluorinated hydrocarbon chloride refrigerant, which is packaged and sold in a cylinder type container of 13.6 kg, 20 kg, or 22.7 kg in the domestic automotive A / S market.

As the conditions of the frozen lubricating oil used in the refrigerating device together with the refrigerant described above, it is well dissolved in the refrigerant to provide proper lubrication to each part, to prevent abrasion of the freezer, and the flow point is extremely low so that oil does not solidify in the freezing line The chemical stability and the thermal stability is extremely excellent, and it does not cause a chemical reaction with the foreign substances present in the circulation system of the refrigerant, it should be possible to use for a long time.

Commercially available refrigeration lubricants are packaged and sold in large containers of several liters to hundreds of liters, or in aerosol type packaging in small containers of 50 to 100 g in volume.

In addition, a method of injecting a refrigerant and a freezing lubricating oil widely used at home and abroad is a method of separately injecting a predetermined amount of the refrigerant and the freezing lubricating oil into a freezing device from a large container of several liters to several tons in volume.

The product components of RB-276 (trade name: Freezone) sold by Harold Electric Co., USA are 79% by volume of R-134a, 19% by volume of R-132b and 2% by volume of naphthenic mineral oil. The product was developed as an R-12 solvent substitute due to the destruction of the ozone layer and is a refrigerant containing R-134a as a main component.

The R-134a refrigerant has solubility with ester-based refrigeration lubricant, but since mineral oil is used as a refrigeration lubricant in a vehicle refrigeration system, the R-134a refrigerant has no solubility with mineral oil, thereby improving the solubility of the refrigerant in the refrigerant. In order to do so, the mineral oil and soluble R-142b refrigerant were added.

The purpose of injecting refrigeration lubricant into the refrigerating unit is to increase the solubility of the refrigerant, to improve the chemical and thermal stability of the refrigerant, to improve the lubrication of the refrigerant to improve the abrasion resistance of the refrigerant, This is to improve the mutual compatibility with the parts to prevent damage to the parts.

The naphthenic mineral oil in the RB-276 (trade name: Freezone) component has been described as being added to impart solubility of the refrigerant.

However, it is not possible to check the amount of refrigerated lubricating oil injected when the refrigerant is injected using the RB-276 (trade name: Freezone), and a method of converting the amount of the injected oil into the amount of the injected refrigerant is used macroscopically. This is undesirable because it may cause overfilling of the oil.

In addition, since naphthenic mineral oil is a component of the RB-276 (trade name: Freezone) product, it is added to impart solubility, not to provide lubricity to the refrigerant, and thus, functions as a frozen lubricant. It is added for other purposes.

Therefore, the present inventors have found that an example in which refrigeration lubricating oil is packaged together with a refrigerant in a single container and injected into a refrigerating device to provide lubricity to the refrigerant regardless of the type of refrigerant has been introduced.

Conventionally, when the refrigerant is insufficient after the refrigeration lubricating oil has been widely used a method of filling the freezing lubricating oil by using an oil auto-filled aerosol can or by using an oil injector. If this method is not possible, a two-stage injection method of removing all the refrigerant, vacuuming the inside of the refrigerating device, and then injecting the refrigerant lubricant and the refrigerant, respectively, was widely used. Since it is difficult to inject an appropriate amount of refrigeration lubricant and requires a two-step process, it is difficult to inject refrigerant.

Whether a refrigerant composition comprising both a conventional refrigerant and a refrigeration lubricant has not been marketed or introduced, the refrigerant is distributed in containers of several hundred grams to tens of kilograms, and the frozen lubricant is distributed in containers of tens of ml to tens of liters. This is because a method of separately injecting an appropriate amount of refrigerant and freezing lubricating oil from a container has been mainly used. In addition, when the refrigerant and the refrigerant lubricating oil are injected from the refrigerant composition containing both the refrigerant and the refrigeration lubricant of several liters to several tons, the specific gravity of the refrigerant and the frozen lubricating oil is different and separated in the container. Not only because it was impossible to inject lubricating oil at the same time, but also because it could not confirm the amount of oil injected into the freezing device.

The present invention is to solve the above-mentioned problems, the object of the present invention includes a refrigerant and refrigeration lubricating oil at the same time is injected into the refrigerating device in a single container unit of various sizes as well as easy to use and easy to carry The leakage preventing agent or the leak checker may be further included to delay the leakage of the refrigerant and prevent the leakage of the refrigerant, as well as to provide a functional refrigerant composition that enables easy identification of the leaked portion of the refrigerant.

It is also an object of the present invention to provide a simple injection method of the functional solvent composition.

1 shows a two piece top valve type packaging container of a functional refrigerant composition used in the method of the present invention.

In order to achieve the above object, the present invention (a) 100 parts by weight of a refrigerant; And (b) 0.5 to 30 parts by weight of the refrigeration lubricant.

The present invention also provides a method for injecting a functional refrigerant composition, wherein the functional refrigerant composition is injected into a refrigerating device in a container unit of 50 to 2000 g in volume.

Hereinafter, the present invention will be described in more detail.

The functional refrigerant composition including both the refrigerant and the refrigerant lubricant of the present invention is contained in a single container, and does not need to separately inject the refrigerant and the refrigerant lubricant, and may further include a leak preventive agent or a leak checker, thereby delaying the refrigerant leak and Not only are leaks prevented, but it is easy to identify refrigerant leaks.

In the functional refrigerant composition of the present invention, the refrigerant is preferably ammonia, fluorinated hydrocarbon chloride refrigerants, azeotropic mixed refrigerants, chloromethyl, and the like, and particularly in the case of vehicles, fluorinated hydrocarbon chloride refrigerants are preferable. As the fluorinated hydrocarbon chloride refrigerant, HFC, HCFC, CFC or HC refrigerant is preferable.

Specific examples of the HFC, HCFC, CFC or HC-based refrigerant may be a single refrigerant or a mixed refrigerant of the single refrigerant registered in the American Society of Heating, Refrigerating and Air-Conditioning Engineering (ASHRAE). An example of this single refrigerant is shown in Table 1 below.

division Name of refrigerant Chemical formula Single refrigerant R-12 CCl ₂ F ₂ R-22 CHClF ₂ R-134a CH ₂ FCF ₃ R-152a CH ₃ CHF ₂ R-290 CH ₃ CH ₂ CH ₃ R-600a CH (CH ₃ ) ₂ CH ₃

Currently, the development trend of mixed refrigerants is focused on the direction of satisfying three elements of flammability, environmental friendliness and non-toxicity, and especially, the development of mixed refrigerants satisfying both flammability and environment friendliness of the three elements is actively made. ought.

In addition, the functional refrigerant composition of the present invention further comprises a refrigeration lubricant in order to prevent abrasion of the refrigerator, to improve the chemical and thermal stability of the refrigerant, and to not cause a chemical reaction between the foreign substances and the refrigerant present in the circulation system of the refrigerant. do.

As the frozen lubricating oil, mineral oil, alkylbenzene oil, polyester oil, polyalkylene glycol oil, polyvinyl ester oil, or a mixture thereof is preferable.

In addition, the functional refrigerant composition of the present invention may further include other functional additives such as antioxidants, anti-wear agents.

The content of the frozen lubricating oil in the functional refrigerant composition is preferably 0.5 to 30 parts by weight based on 100 parts by weight of the refrigerant. If the content of the refrigeration lubricant in the functional refrigerant composition is less than 0.5 parts by weight based on 100 parts by weight of the refrigerant can not prevent the wear of the freezer, there is a problem that the heat transfer is not made smoothly resulting in overheating of the compressor, more than 30 parts by weight If there is a problem that the internal pressure of the refrigerating apparatus is increased or the heat transfer is not performed smoothly, the performance of the refrigerating apparatus is lowered.

The functional refrigerant composition used in the method of the present invention is characterized in that it may further comprise a leak preventive agent, a leak checker or a mixture thereof in addition to the refrigerant and refrigeration lubricant.

The cause of the coolant leak is that each connection part of the refrigerating device is gradually freed by vibration and shock, which causes a very small gap.In particular, in the case of a vehicle, the pipe is broken or cracked due to a collision and various accidents. Because.

The leakage preventing agent is a functional additive added to prevent the outflow of the refrigerant circulating in the refrigerating device, and functions to prevent leakage of the refrigerant by infiltrating between metal coupling portions in the refrigerating device. In particular, the use of the refrigerant leakage preventing agent is preferably injected every three to five years of the use cycle of the refrigerating device. As a leak prevention agent, all the general leak prevention agents can be used.

The leak check agent is a fluorescent substance added to the refrigerant composition, and since it can be observed through infrared light or glasses when leaking through the piping of the refrigeration device, a functional additive that makes it easy to check the leaked portion of the coolant through the leak check agent. to be. All leak checkers can be used as leak checkers.

The content of the leakage preventing agent, the leak checker, or a mixture thereof contained in the functional refrigerant composition is preferably 0.1 to 10 parts by weight based on 100 parts by weight of the functional refrigerant composition. If the amount of the leakage preventing agent, the leak checker, or a mixture thereof is less than 0.1 part by weight, the outflow of the refrigerant in the refrigerating device cannot be prevented effectively, and there is a problem that it is difficult to confirm when the refrigerant leaks. It is not preferable because the freezing performance is lowered and the internal pressure in the freezing device is increased due to the circulation failure of the refrigerant in the freezing device, which may cause the failure of the compressor.

The present invention also provides a method for injecting a functional refrigerant composition into which the functional refrigerant composition is injected into a refrigerating device in a container unit of 50 to 2000 g volume.

As a method of injecting a refrigerant composition which is widely used at present, as described in the above-mentioned problems of the prior art, a refrigerant is injected in a container unit of 13.6 kg, 20 kg, and 22.7 kg volumes, and a refrigeration lubricant is separately injected.

Therefore, when refrigerated lubricating oil is mixed with refrigerant stored in 13.6 kg, 20 kg, and 22.7 kg volumes and injected into the refrigerating device, the refrigerant is distributed in the upper part of the large capacity container and the refrigeration lubricant is distributed in the lower part. There is a problem in that it is impossible to inject a mixture of a suitable amount of refrigerant and lubricating oil.

However, in the present invention, by injecting a functional refrigerant composition containing a refrigerant and refrigeration lubricant in a container of 50 to 2000 g volume and injecting it into the refrigerating device, an appropriate amount of refrigerant and refrigeration lubricant required for the refrigerating device can be injected. The method of injecting the refrigerant composition is simple, and the portability of the refrigerant composition is simple so that anytime, anywhere can be easily injected. As a method of injecting the functional refrigerant composition of the present invention, any of a conventionally widely used refrigerant injection method may be preferably used.

Since the refrigerant filling capacity of the refrigerating apparatus widely used in vehicles and the like at present is generally 300 to 1500 g, the volume of the packaging container of the functional refrigerant composition of the present invention is preferably 50 to 2000 g. Therefore, it is possible to simultaneously inject an appropriate amount of refrigerant and freezing lubricating oil into the refrigerating device by one to several charges, so the method of injecting the refrigerant and freezing lubricating oil is simple, and there is an advantage that an appropriate amount of refrigerant and freezing lubricant can be injected.

The vessel is preferably a disposable refrigerant vessel, and more particularly a vessel of a top valve type or cylinder type with a volume of 50 to 2000 g. As the top valve type container, a two piece type or three piece type container is used, and as the capacity of the refrigerant increases, a two piece type top valve container is preferably used. Three-piece vessels are less expensive to manufacture, but when the volume of functional refrigerant exceeds 1000 g, two-piece vessels must be used to withstand the expansion pressure of the refrigerant.

1 shows a two piece top valve type vessel of a functional refrigerant composition used in the method of the present invention.

In particular, since the functional refrigerant composition used in the method of the present invention can be sold and distributed while being contained in a container having a volume of 50 to 2000 g, the self-operating driver of the vehicle can carry it directly, and thus its use is easy.

As described above, the functional refrigerant composition of the present invention includes both a refrigerant and a refrigerant lubricant, so that the refrigerant and the refrigerant lubricant can be injected at the same time in one charge, the injection method is simple, and the volume of the filling container is variously manufactured. It is portable and can do it. In addition, the functional refrigerant composition of the present invention may further include a leak preventing agent or a leak check agent, so that the refrigerant leak is delayed and the refrigerant leak is prevented, and the refrigerant leak site is easily identified.

Hereinafter, preferred examples and comparative examples of the present invention are described. The following examples and comparative examples are described for the purpose of more clearly expressing the present invention, but the contents of the present invention are not limited to the following examples and comparative examples.

(Examples 1 to 3)

Functional Refrigerant Composition Preparation

By mixing as shown in the composition ratio shown in Table 2 below, 800 g of the functional refrigerant composition of Examples 1 to 3 were prepared.

(Unit: g) division Example 1 Example 2 Example 3 CCl ₂ F ₂ (R-12 refrigerant) 740 750 760 Mineral Oil (Frozen Lubricant) 30 26 20 Leak Resistant (Super Cool Rig-Stop) 15 12 10 Leak Check (Castrick-Stop) 15 12 10

Refrigerant Filling Time Comparison

Injecting the refrigerant into the refrigerating device with the functional refrigerant composition of Example 1 to the R-12 air conditioner system (manufactured by Halla HVAC) of 1998, and then the refrigerant, refrigeration lubricant, leak inhibitor and leak checker of Example 1 Case (Comparative) The time taken for the refrigerant charge time is shown in Table 3 below.

(Unit: minute) division Example 1 Comparative example Refrigerant Filling Process 17 15 Refrigeration Lubricant Filling Process 8 Leak Resistant Filling Process 8 Leak Check Filling Process 5 sub Total 17 36

As shown in Table 3, when the functional refrigerant composition of the present invention is injected into the refrigerating device, the refrigerant, the freezing lubricant, the leak preventive agent and the leak checker can be simultaneously filled, thereby significantly reducing the time required for the refrigerant filling operation.

The functional refrigerant composition of the present invention includes both the refrigerant and the refrigerant lubricant, so that the refrigerant and the refrigerant lubricant can be injected at the same time in one charge, the injection method is simple, and the volume of the filling container can be manufactured in various ways. It is easy. In addition, the functional refrigerant composition of the present invention may further include a leak preventing agent or a leak check agent, so that the refrigerant leak is delayed and the refrigerant leak is prevented, and the refrigerant leak site is easily identified.

Claims (7)

(a) 100 parts by weight of refrigerant; And (b) 0.5 to 30 parts by weight of refrigeration lubricant Functional refrigerant composition comprising a. The method of claim 1, Functional refrigerant composition, characterized in that the refrigerant is HFC, HCFC, CFC or HC-based. The method of claim 1, The refrigeration lubricant oil is a functional refrigerant composition, characterized in that selected from the group consisting of mineral oil, alkylbenzene oil, polyester oil, polyalkylene glycol oil and polyvinyl ester oil. The method of claim 1, The composition is a functional refrigerant composition, characterized in that it further comprises 0.1 to 10 parts by weight of a leak preventing agent or leak check. The refrigerant composition according to any one of claims 1 to 4, wherein the refrigerant composition is for injection of a refrigeration apparatus of a vehicle. A method of injecting a functional refrigerant composition according to any one of claims 1 to 4, wherein the functional refrigerant composition according to any one of claims 1 to 4 is injected into a refrigerating device in a container unit of 50 to 2000 g in volume. The method of claim 6, The container is a functional refrigerant composition injection method, characterized in that the disposable refrigerant container.