KR101622747B1 - Automation system for refrigerant recovery, washing and charging from refrigerating cycle and method therefrom - Google Patents

Abstract

The present invention relates to a refrigerant recovery, cleaning and filling automation system for a refrigeration cycle wherein the opening and closing valves are arranged in at least one row on a flat body of the valve integrated assembly having a constant thickness, A valve 2 connected to the high-pressure side port of the refrigeration cycle, a valve 9 connected to the liquid refrigerant pipe of the refrigerant recovery cylinder in the apparatus, and a valve 16 connected to the gas refrigerant tube of the refrigerant recovery cylinder And the second row is connected to a valve 3 connected to the oil separator 1 in the apparatus, a valve 4 connected to the compressor in the apparatus, and an oil separator 3 and an oil separator 4 in the apparatus, respectively, And a valve (12) connected to the compressor are arranged in the refrigerant circuit. The valve integrated assembly includes a plurality of mounting grooves for fixing the plurality of open / close valves on the upper surface of the body, a channel hole communicating with the mounting grooves so as to open and close for refrigerant flow is formed at the center and the periphery of the mounting grooves, And a plurality of flow passages selectively communicating with the respective flow passages of the mounting grooves provided with the on-off valves of the first row are provided on one side of the first row, and on-off valves of the second row are provided on the other longitudinal side of the assembly body A plurality of flow paths are provided which selectively communicate with the respective flow paths of the mounting grooves.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic apparatus for collecting refrigerant,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant recovery, cleaning and charging method, and more particularly, to an automatic apparatus and method for collectively processing refrigerant recovery, cleaning, vacuum, filling, and oil replenishing operations from a refrigeration cycle of an air conditioner. will be.

The refrigeration cycle is mainly used in a refrigerator or an air conditioner. The main constituent of the refrigeration cycle is a compressor (discharging a refrigerant in a gaseous state at a high temperature and a high pressure), a condenser (a high- (The refrigerant is decompressed to a low temperature and a low pressure), an evaporator (vaporizing the liquid refrigerant at a low temperature and a low pressure through heat exchange with ambient air), blowing the air cooled in the heat exchanging process of the evaporator to a blowing fan Thereby cooling the inside of the room or the refrigerator.

1, the refrigeration cycle is provided with one or more ports for injecting or withdrawing refrigerant, such as a low-pressure port LP between the evaporator and the compressor, a high-pressure port (LP) between the condenser and the expansion valve HP).

On the other hand, during operation of the refrigeration cycle in an air conditioner or a refrigerator, the refrigerant oil may be chemically deteriorated due to the oil contained in the refrigerant and the oil contained in the refrigerant. In addition, An oxide film or a scale may be formed.

However, if an oxide film or scale is formed on the inner wall of the refrigerant circulation pipe, a quantity smaller than the mass set at the time of leaving the vehicle must be charged. If the mass is to be adjusted to the set mass, There is a problem in that the compressor is overloaded and the output of the engine for driving the compressor is lowered, leading to waste of fuel, and the inside of the compressor is burnt to damage the compressor .

In order to solve this problem, in the related art, the components of the refrigeration cycle are disassembled and the cleaning liquid is injected into the refrigerant circulation pipe to clean the refrigerator. However, in this case, the air conditioner or the refrigerator must be stopped and the components must be removed from the product There is a problem in that it is troublesome and inconvenient in disassembling and reassembling. In addition, since the operation of recovering, cleaning, vacuuming and filling the refrigerant is not unified, each of the processes must be individually performed, which results in a disadvantage that work efficiency is lowered.

2. Description of the Related Art [0002] In recent years, Korean Utility Model Registration Publication No. 1996-2654 (entitled "Recovery, Regeneration, Cleaning and Charging Device for Automobile Air-Conditioner Refrigerant Gas: FIG. 2)" for collecting, , And Korean Patent Laid-Open Publication No. 1998-10265 (name: washing, compressing, vacuum, charger for refrigerator) have been proposed. However, most of these techniques are performed by individual operation methods, It is not.

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the problems described above, and it is an object of the present invention to provide an automatic apparatus and method for collectively processing refrigerant recovery, cleaning, vacuum, filling and oil replenishing operations from a refrigeration cycle of an air conditioner have.

According to the present invention, there is provided an apparatus for automatically collecting, cleaning and charging refrigerant for a refrigeration cycle, including a valve integrated assembly in which a plurality of open / close valves are integrated into one unit, The first row being arranged in at least one row on a flat body of the integrated assembly, the first row comprising: a valve 1 connected to the low pressure side port of the refrigeration cycle; a valve 2 connected to the high pressure side port of the refrigeration cycle; A valve 9 connected to the liquid refrigerant pipe of the cylinder, and a valve 16 connected to the gas refrigerant pipe of the refrigerant recovery cylinder are arranged. In the second row, a valve 3 connected to the oil separator 1 in the apparatus, And a valve 12 connected to the oil separator 3 and the oil separator 4 in the apparatus and connected to the compressor in the apparatus It provides a refrigerant recovery, cleaning and charging automation device according to claim.

According to the present invention, the valve integrated assembly includes a plurality of mounting grooves for fixing the plurality of on-off valves on the upper surface of the body, and channel bores communicating with the center of the mounting grooves for allowing refrigerant to flow And a plurality of flow paths communicating with the respective flow paths of the mounting grooves provided with the opening and closing valves of the first row are provided on one long side of the assembly body, There is provided a plurality of flow paths which selectively communicate with the respective flow paths of the mounting grooves provided with the on /

According to the present invention, the opening and closing valves are solenoid valves, and the flow holes formed at the center and the peripheral portions of the mounting grooves are opened or closed by the operation of the plunger in the solenoid valve by the electric signal.

According to the present invention, the first row of the valve integration assembly may further include a valve 10 connected to the fresh water in the apparatus and connected to the low-pressure side port of the refrigeration cycle.

According to the present invention, the second row of the valve integration assembly may further include a valve 11 connected to the oil separator 1 and the oil separator 2 in the apparatus, respectively, and connected to waste oil in the apparatus.

According to the present invention, the refrigerant can be recovered from the refrigeration cycle of the air conditioner, and the cleaning, the vacuum, and the refrigerant filling operation can be collectively processed. In addition, by integrally arranging a plurality of open / close valves that are basically scattered in the apparatus, the refrigerant pipelines can be neatly arranged inside the apparatus, and the manufacture and maintenance of the apparatus can be made much easier.

1 is a view showing a refrigeration cycle of a general air conditioner.
2 is a view showing a schematic configuration and operation of a conventional refrigerant recovery, washing and filling automation apparatus for a refrigeration cycle.
FIG. 3 is a view showing a schematic configuration of a refrigerant recovery, washing and filling automation apparatus according to the present invention.
FIG. 4 is a view for explaining a body block and a valve plunger portion, that is, a solenoid portion, of a valve integrated assembly provided in the refrigerant recovery, washing and filling automation apparatus of FIG. 3, And FIG. 4B is a rear perspective view of the valve integration assembly with all the valves installed in the block.
FIG. 5 is a development view showing a schematic plan view and a side view of a body block in a state in which solenoids of respective valves are removed, in order to explain the arrangement relationship of the flow paths for refrigerant flow in and out of the valve integration assembly of FIG.
FIG. 6 is a diagram and block diagram illustrating an operating state in the recovery mode selection for recovering the refrigerant in the refrigeration cycle in the refrigerant recovery, washing and filling automation apparatus of FIG. 3;
Fig. 7 is an operational state when selecting a cleaning mode for cleaning the refrigeration cycle in the refrigerant recovery, washing and filling automation apparatus of Fig. 3, Figs. 7a and 7b are a diagram showing the cleaning order from the low- 7C and 7D are a diagram and a block diagram showing the cleaning sequence from the high-pressure side port to the low-pressure side port.
FIG. 8 is a diagram and block diagram showing the operating state in the vacuum mode selection for vacuum formation in the refrigeration cycle in the refrigerant recovery, washing and filling automation apparatus of FIG. 3; FIG.
Fig. 9 is a diagram and block diagram showing an operating state when selecting a charging mode for charging a refrigerant in a refrigeration cycle in the refrigerant recovery, washing and filling automation apparatus of Fig. 3; Fig.
Fig. 10 is a diagram and block diagram showing an operating state when selecting a waste oil discharge mode for discharging waste oil in the refrigerant recovery, washing and filling automation apparatus of Fig. 3; Fig.
Fig. 11 is a diagram and block diagram showing the operating state when selecting the compressor oil replenishment mode for replenishing oil in the compressor in the refrigeration cycle in the refrigerant recovery, washing and filling automation apparatus of Fig. 3;

The present invention relates to an automatic apparatus capable of collectively processing operations such as refrigerant recovery, cleaning, vacuum, and charging from a refrigeration cycle using only one compressor and a condenser without a vacuum pump, and further performing an operation such as waste oil discharge and compressor oil replenishment . In addition, the present invention is configured to collect the solenoid valves scattered throughout the piping to control the flow path, thereby eliminating the complexity due to electrical wiring in the apparatus, providing convenience in assembly and installation, So that it can be solved.

In the apparatus of the present invention, the compressor not only compresses the refrigerant but also acts as a vacuum pump. The compressor integrated with the solenoid valves together with the compressor drive is used as a valve assembly assembly for refrigerant recovery, piping cleaning, It is possible to automatically perform the refrigerant charging operation automatically and to automatically perform the compressor oil replenishing operation and the waste oil discharging operation individually or in connection with the above-described refrigerant recovery, piping cleaning, vacuum, and refrigerant charging operations, . ≪ / RTI >

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view of a first embodiment of the present invention; Fig.

In the following description, the same or similar elements are denoted by the same reference numerals throughout the specification and the detailed description thereof will be repeated. It will be omitted.

FIG. 3 illustrates a refrigerant recovery, washing and filling automation apparatus according to an embodiment of the present invention. The automatic refrigerant recovery, cleaning and filling automation apparatus includes a valve integration assembly P in which a plurality of on- It is made of main parts. The valve integrated assembly P is applied to a general type of solenoid valve structure, and the lower valve body portions except for the upper solenoid portion are integrated into one flat block type, and a plurality of solenoids (S1, S2, S3,...). Each of the mounting grooves P2 can be coupled with the solenoid portions S1, S2, S3 ... in a screw-tight manner, and is provided in the valve body of a common solenoid valve at the center and peripheral portions of the respective mounting grooves P2. (Hereinafter, referred to as " a flow path hole ") corresponding to the flow-in / out flow path formed by dividing the flow path by the action of the solenoid portions S1, S2, S3, So that the flow of the refrigerant and the oil through the respective pipes can be controlled by opening and closing the central flow holes b.

Each pair of the mounting grooves P2 formed on the body block P1 of the valve integrated assembly P and the solenoid portions S1, S2, S3 ... coupled thereto corresponding to the mounting grooves P1, Open / close valve " or " valve ", and these opening / closing valves may be arranged side by side to form at least one row. As one example, the open / close valves include a first row consisting of valve 1 (S1), valve 2 (S2), valve 9 (S9), valve 16 (S16) and valve 10 (S10) The second row consisting of the valve 3 (S3), the valve 4 (S4), the valve 12 (S12), the valve 15 (S15) and the valve 11 (S11) may be arranged side by side. (Hereinafter, referred to as an " on-off valve " or " valve &

Here, the connection relationship between the valves will be described later. First, the valve 1 (S1) is connected to the refrigerant pipeline 1 (1) from the peripheral flow passage (a) Pressure side port LP of the refrigeration cycle by the refrigerant pipeline 2 (hereinafter referred to as "line 1") L1 and the valve 2 (S2) Side port HP of the refrigerating cycle (or the refrigerant circulation cycle) of the air conditioner by the refrigerant circulation line L2. The valve 9 (S9) is connected to the liquid refrigerant pipe 81 of the refrigerant recovery cylinder 80 provided in the automation apparatus of the present invention by the line 10 (L10) from the peripheral flow passage a, Is connected to the gas refrigerant pipe (82) of the refrigerant recovery cylinder (80) by the line 9 (L9) from the peripheral flow passage (a). The valve 10 (S10) is connected to the fresh water line 10 by the line 19 (L19) from the central flow path b and from the peripheral flow path a to the low pressure side of the air conditioner refrigeration cycle Port (LP).

The valve 3 (S3) is connected to the oil separator 1 (20) provided in the automation apparatus of the present invention by the line 3 (L3) from the central flow passage (b) The valve 4 (S4) is connected to the compressor 40 provided in the automation apparatus of the present invention by the line 13 (L13) from the central flow passage b, and the valve 12 (S12) (a) to 15 (L15), which are respectively connected to the oil separator 3 (50) and the oil separator 4 (60) provided in the automation apparatus of the present invention and are connected to the line 16 And is connected to the compressor (40). The oil separator 3 50 and the oil separator 4 60 are connected to each other by a line 15 L 15 and the oil separator 4 60 is provided with an exhaust valve 61 on one side and also by a line 14 L 14 And is connected to the compressor (40). The oil separator 3 50 is connected to the oil separator 1 20 and connected to the compressor 40 by the line 6 L 6 and the oil separator 1 20 is connected to the automation apparatus And the condenser 70 is connected to the refrigerant recovery cylinder 80 by the line 8 (L8). The oil separator 1 20 is connected to the oil separator 2 30 by the line 4 L 4 and the oil separator 2 30 is connected to the compressor 40 by the line 5 L 5. The valve 11 (S11) is connected to the oil separator 1 (20) and the oil separator 2 (30) by the line 17 (L17) from the peripheral flow passage a respectively and by the line 18 (L18) Which is connected to the waste water circulation 90 provided in the waste water treatment plant.

Hereinafter, the configuration of the valve integrated assembly will be described in more detail with reference to FIGS. 4 and 5. FIG.

FIG. 4 is a view for explaining a body block and a valve plunger portion, that is, a solenoid portion, of a valve integrated assembly provided in the refrigerant recovery, washing and filling automation apparatus of FIG. 3, 4 is a rear perspective view of a valve integrated assembly in which all the valves are installed in a block, FIG. 5 is a rear perspective view of the valve integrated assembly of FIG. 4, Fig. 3 is a developed view showing a schematic plan view and a side view of a body block in a state in which a part is removed; Fig.

As described above, the valve integration assembly P includes a plurality of open / close valves, that is, solenoid valves disposed in a single place, scattered around the piping for controlling the flow passage, through which a refrigerant pipe Line and electrical wiring to be cleaner, and also make it easier to manufacture and maintain the device.

The valve integrated assembly P is provided with a plurality of open / close valves on a flat body block P1 having a predetermined thickness. As described above, the valve integrated assembly P includes a plurality of open / Mounting grooves P2 are formed. Each of the on-off valves S1, S2, S3, ... is mounted on the mounting grooves P2 in a screw-tight manner, and peripheral and central portions of the mounting grooves are provided with flow holes (a, b) are formed. Each of the opening and closing valves S1, S2, S3, ... in the present invention may be constituted by solenoid valves. In this case, the opening holes a formed in the peripheral and central portions of the respective mounting recesses P2 , b) can be opened and closed by the operation of a plunger portion (not shown) in the solenoid valve by the electric signal and can communicate with each other.

The assembly body, that is, one side surface in the longitudinal direction of the body block P1, is provided with the respective flow holes a of the mounting grooves P2 provided with the above-mentioned first row of valves S1, S2, S9, S16, a plurality of flow passages A1, A2, ..., A7 for selectively communicating with an inlet and an outlet of each valve are formed on the other longitudinal side surface of the assembly body P1, A plurality of flow paths B1, B2, ..., B7 selectively communicating with the flow paths a, b of the mounting grooves P2 provided with the on-off valves S3, S4, S12, S15, Respectively.

As a more specific example, the channel hole A1 is connected to the peripheral channel hole a of the valve S1 (S1) through a channel on one longitudinal side surface of the assembly body P1, The central flow hole b is connected to the central flow hole b of the valve 2 S2 through the flow passage and to the flow holes a and b of the valve 3 and S3. The central hole 2b of the valve 2 is connected to the central hole 2b of the valve 2 through the central hole of the valve 2 B and the flow paths a and b of the valve 3 and the valve S4. The flow hole 3 (A3) is connected to the peripheral flow hole (a) of the valve 9 (S9) through the flow passage and the flow hole 4 (A4) is connected to the central flow hole b And the central flow hole b of the valve 9 (S9) is connected to the flow holes a and b of the valve 16 (S16) and the flow holes a and b of the valve 10 (S10) . The flow path 5 is connected to the peripheral flow path a of the valve 16 S16 via the flow path and the central flow path b of the valve 16 is connected to the flow path of the valve 10 (A, b). The flow hole 6 A6 is connected to the peripheral flow hole a of the valve 10 (S10) through the flow passage and the flow hole 7 (A7) is connected to the central flow hole b of the valve 10 do.

The channel hole B1 is connected to the central channel hole b of the valve S3 through the channel and the central channel hole b of the valve S3 is connected to the other end of the valve body S3, And is connected to the central flow passage b of the valve 15 (S15) through the flow passage. The oil hole B2 is connected to the central oil hole b of the valve S4 through the oil passage and the oil hole 3 is connected to the peripheral oil hole a of the valve 12 And the flow hole 4 (B4) is connected to the central flow hole b of the valve 12 (S12) through the flow passage. The oil hole 5 is connected to the central oil hole b of the valve 15 through the oil line and the oil hole 6 is connected to the peripheral oil hole a of the valve 11 And the flow hole 7 (B7) is connected to the central flow hole b of the valve 11 (S11) through the flow passage.

In addition, a plurality of flow holes, that is, a flow hole 1 (D1) and a plurality of flow holes (not shown), which selectively communicate with the respective flow holes of the mounting grooves provided with the first row and second row of the on- A flow hole 2 (D2), and a flow hole 3 (D3) are formed. Here, the flow path hole D1 is connected to the peripheral flow path a of the valve 1 (S1) through the flow path, and the flow path hole 2 (D2) is connected to the valve 1 (S1) And the flow hole 3 D3 is connected to the central flow holes b of the valve 3 (S3) and the valve 15 (S15) through the flow passage.

4 and 5, it is preferable that the valve integrated assembly P is formed with a constant height difference to prevent the connection passages, that is, the passages of the flow passages formed in the assembly body P1, from overlapping each other.

3, an open / close valve 8 (hereinafter, referred to as 'valve 8', S8) and a low-pressure switch (not shown) are formed on a line 11 (L11) entering the flow path hole D1 formed on one side surface of the assembly body P1. 1 (LS1) can be installed in this order. Further, the low-pressure switch 2 (LS2) may be provided in the flow hole 2 (D2) and the low-pressure switch 3 (LS3) may be provided in the flow hole 3 (D3).

A line connecting connector P1 extending in at least three directions is provided in the flow path hole A2 of one of the flow paths formed on one longitudinal side of the assembly body P so that the line 2 L2 is connected to one direction, The line 12 (L12) is connected to the line connector P1, and the high voltage switch 1 (HS1) is installed to the line connector P1. A three way valve S5 is provided in the flow hole A4 and the first outlet a of the three way valve S5 is connected to the valve 8 (S8) by the line 11 (L11) 2 The outlet b is connected to the line connection connector P1 by the line 12 (L12). The air hole 5 A5 is connected from the peripheral flow passage a of the valve 16 (S16) to the gas refrigerant pipe 82 of the refrigerant recovery cylinder 80 by the line 9 (L9) Side port LP of the refrigeration cycle by the line 20 (A20) from the peripheral flow passage a of the valve 10 (S10) and the flow passage 7 (A7) is connected from the valve 10 (S10) L19, respectively.

From the above-described configuration, the refrigerant recovery, washing and filling automation apparatus of the present invention selectively performs individual operations such as recovery of the refrigerant from the refrigeration cycle of the air conditioner, cleaning, vacuum and filling, waste oil discharge, It is possible to continuously perform the refrigerant recovery, the washing, the vacuum and the filling operation by one command key input according to the stored control program.

The following describes separate or continuous operations such as recovery, cleaning, vacuum and filling of refrigerant, waste oil discharge, comp oil replenishment, etc. for the refrigeration cycle of the air conditioner by the refrigerant recovery, washing and filling automatic apparatus of the present invention .

Refrigerant recovery

FIG. 6 illustrates an operation state of the recovery mode for selecting the recovery mode for recovering the refrigerant in the refrigeration cycle in the refrigerant recovery, washing and filling automation apparatus of FIG. 3. The recovery of the refrigerant from the refrigeration cycle of the air- The refrigerant can be recovered simultaneously from the low pressure side port LP and the high pressure side port HP. Here, the refrigerant recovery mode may be programmed to perform only the refrigerant recovery as a single operation, but the washing, vacuum, and filling operations described later may be programmed to be sequentially performed subsequently.

The compressor 40 provided in the automation apparatus of the present invention can be connected to the low pressure side port LP and the high pressure side port HP of the refrigeration cycle by connecting the refrigerant recovery, Pressure side port LP and the high-pressure side port HP as the vacuum is generated in the lines from the compressor 40 to the low-pressure port LP and the high-pressure port HP, . At this time, the refrigerant (gas) drawn out from the low-pressure side port LP passes through the line 1 (L1) and enters the valve 3 (S3) in accordance with the opening of the valve 1 (S1) (Liquid) flows through the line 2 (L2) and enters the valve 3 (S3) according to the opening of the valve 2 (S2) where the gaseous refrigerant and the liquid refrigerant are mixed. Subsequently, the valve 3 (S3) is opened, and the mixed refrigerant passes through the oil separator 1 (20), the oil separator 2 (30), and the oil contained in the refrigerant is removed. The refrigerant having passed through the oil separator 2 (30) flows into the compressor (40), is phase-changed into a high-temperature and high-pressure gas state, and the oil contained in the refrigerant is further removed while passing through the oil separator (3) And then to the condenser 70 along the refrigerant pipe 21 of the oil separator 1 (20). While passing through the condenser 70, the high-temperature and high-pressure gaseous refrigerant undergoes heat exchange and is phase-changed into a high-pressure and low-temperature liquid state, and is stored in the refrigerant recovery cylinder 80 along the line 8 (L8).

Cleaning mode

The washing mode for washing the inside of the refrigeration cycle can be divided into the selection 1 and the selection 2 according to the washing direction, and will be described as follows.

7A and 7B illustrate a refrigeration cycle cleaning process from the low pressure side port LP to the high pressure side port HP in accordance with the cleaning mode selection 1, But it can be set as a program input so that it is automatically and continuously performed after the refrigerant recovery mode is completed.

When the washing mode selection 1 command is issued, the compressor 40 in the refrigerant recovery, washing and filling automation apparatus of the present invention is driven, thereby supplying the gas refrigerant through the gas refrigerant tube 82 of the refrigerant recovery cylinder 80 And the liquid refrigerant is also supplied through the liquid refrigerant pipe (81). It is preferable that the supply of the gas refrigerant along with the opening of the gas refrigerant tube 82 and the supply of the liquid refrigerant due to the opening of the liquid refrigerant tube 81 are controlled to be performed with a predetermined time difference. At this time, the gas refrigerant bypasses the peripheral flow passage a of the valve 16 (S16) along the line 9 (19) and enters the valve 9 (S9), and the liquid refrigerant flows along the line 10 ). The supply of the gas refrigerant and the liquid refrigerant in the cleaning mode selection 1 may be set so that only one of them is performed.

The liquid or gaseous refrigerant entering the valve 9 (S9) advances to the valve 5 (three-way valve S5) in accordance with the opening of the valve 9 (S9) And is sent to the valve 8 (S8) through the first outlet (a) in accordance with the closing of the outlet (b), and the opening of the valve 8 (S8) (a) and enters the low-pressure side port (LP) along the line 1 (L1). The refrigerant flows through the low pressure side port (LP) along the refrigerating cycle of the air conditioner. The refrigerant cleaned inside the cycle such as the compressor and the condenser is drawn to the high pressure side port (HP) And the oil contained in the refrigerant is removed while passing through the oil separator 2 (30) through the oil separator 1 (20) as the valve 2 (S2) and the valve 3 (S3) are opened. The refrigerant that has passed through the oil separator 2 (30) flows into the compressor (40), is phase-changed into a high-temperature and high-pressure gas state, is further included in the refrigerant while passing through the oil separator (3) And then the refrigerant is transferred to the condenser 70 along the refrigerant pipe 21 of the oil separator 1 20 to be phase-changed into a high-pressure low-temperature liquid state, Lt; / RTI >

7C and 7D show the cleaning sequence from the high-pressure side port to the low-pressure side port in accordance with the cleaning mode selection 2. In the case of the cleaning mode selection 2, as in the case of the selection 1, And may be set as a program input so that the automatic execution is continuously performed after the recovery mode is completed.

When the washing mode selection 2 command is applied, the compressor 40 in the refrigerant recovery, washing and filling automation apparatus of the present invention is driven, thereby supplying the gas refrigerant through the gas refrigerant tube 82 of the refrigerant recovery cylinder 80 And the liquid refrigerant is also supplied through the liquid refrigerant pipe (81). It is preferable that the supply of the gaseous refrigerant according to the opening of the gas refrigerant tube 82 and the supply of the liquid refrigerant due to the opening of the liquid refrigerant tube 81 are controlled so as to be performed with a constant time difference. At this time, the gas refrigerant bypasses the peripheral flow passage a of the valve 16 (S16) along the line 9 (19) and enters the valve 9 (S9), and the liquid refrigerant flows along the line 10 ). Of course, the supply of the gas refrigerant and the liquid refrigerant may be set so that only one of them is performed in the cleaning mode selection 2 as well.

The liquid or gaseous refrigerant entering the valve 9 (S9) advances to the valve 5 (three-way valve) S5 in accordance with the opening of the valve 9 (S9) And enters the high-pressure side port HP via the second outlet b via the high-pressure switch HS in accordance with the opening of the outlet b. The refrigerant flows through the high pressure side port (HP) and flows through the refrigerant cycle of the air conditioner. The refrigerant that has been thoroughly cleaned in the cycle such as the expansion valve and the evaporator is drawn to the low pressure side port (LP) The refrigerant passes through the oil separator 1 (20) and the oil separator 2 (30) in accordance with the opening of the valve 3 (S3) Oil is removed. The refrigerant that has passed through the oil separator 2 (30) flows into the compressor (40), is phase-changed into a high-temperature and high-pressure gas state, is further included in the refrigerant while passing through the oil separator (3) And then the refrigerant is transferred to the condenser 70 along the refrigerant pipe 21 of the oil separator 1 20 to be phase-changed into a high-pressure low-temperature liquid state, Lt; / RTI >

Vacuum mode

FIG. 8 shows an operating state of the vacuum mode for vacuum formation in the refrigeration cycle in the refrigerant recovery, washing and filling automation apparatus of FIG. 3, wherein after the refrigeration cycle of the air conditioner is cleaned, Vacuum operation is performed to completely remove residues such as residual refrigerant and refrigerant oil. It is preferable that the vacuum operation is programmed such that the cleaning mode and the vacuum mode are connected to each other so that the vacuum operation can be performed automatically when the cleaning operation for the refrigeration cycle is completed.

When the vacuum mode is executed, the compressor 40 in the refrigerant recovery, washing and filling automation apparatus of the present invention is driven, and accordingly, the line in the section between the compressor 40 and the low pressure side port LP and the high pressure side port HP So that the remainder is drawn out from the low-pressure side port LP and the high-pressure side port HP of the refrigeration cycle, respectively. The remainder drawn out from the low-pressure side port LP moves along the line 1 (L1), enters the valve 4 (S4) according to the opening of the valve 1 (S1) Water moves along line 2 (L2) and enters valve 4 (S4) as valve 2 (S2) opens. As the valve 4 (S4) opens, the remainder passes through the compressor (40) along the line 13 (L13) and flows into the oil separator 4 (60), and the exhaust valve 61 The air contained in the residues is discharged to the outside. The remainder after the air discharge is transferred to the compressor 40 again along the line 15 (L15) and the line 16 (L16) according to the opening of the valve 12 (S12).

Refrigerant charge

FIG. 9 shows an operating state when the charging mode is selected for charging the refrigerant in the refrigeration cycle in the refrigerant recovery, washing and filling automation apparatus of FIG. 3, in which the amount of refrigerant in the refrigeration cycle of the air conditioner is insufficient, The refrigerant charge mode can be performed individually or automatically to charge the refrigerant when recovery, washing or vacuuming is completed. In the case of the automatic mode in which refrigerant recovery, washing, vacuum, and charging operations are performed in a lump continuously, the program setting Input is possible in step.

When the refrigerant charge command is applied, the liquid refrigerant is supplied through the liquid refrigerant tube 81 of the refrigerant recovery cylinder 80, and the liquid refrigerant enters the valve 9 (S9) along the line 10 (L10). At this time, the refrigerant is filled with the saturated pressure in the refrigerant recovery cylinder 80, and the inside of the refrigeration cycle of the air conditioner to be charged may be evacuated and then charged to facilitate charging. The refrigerant advances to the valve 5 (three-way valve) S5 in accordance with the opening of the valve 9 (S9) and advances to the first outlet (b) in accordance with the closing of the first outlet a / (a) to the valve 8 (S8) and bypasses the valve 1 (S1) via the low pressure switch 1 (LS1) by the opening of the valve 8 (S8) to enter the low pressure side port LP of the refrigeration cycle And is filled into the refrigeration cycle of the air conditioner through the low pressure side port (LP). Although not shown separately in the drawings, the present invention is of course also possible to charge the gas refrigerant through the gas refrigerant pipe 82 and the high-pressure port HP of the refrigerant recovery cylinder 80.

Waste oil discharge

FIG. 10 shows an operating state when selecting a waste oil discharge mode for discharging waste oil in the refrigerant recovery, washing and filling automation apparatus of FIG. 3, and the waste oil discharge mode can be individually performed through command key input. Of course, in the automation apparatus of the present invention, the waste oil discharge mode for discharging the waste oil in the oil separator 1 (20) and the oil separator 2 (30) can be automatically executed sequentially in at least one operation mode of refrigerant recovery, It is preferable to be programmed so that

When the waste oil discharge command is applied, the discharge pressure correction of the valve 15 (S15) through the low pressure switch LS3 can be first performed. Then, the waste oil drawn out from the oil separator 1 (20) and the oil separator 2 (30) moves along the line 17 (L17) and enters the peripheral flow passage a of the valve 11 (S11) S11) to the waste flow path 90 along the line 18 (L18).

Comp Oil  supplement

FIG. 11 shows an operation state when the compressor oil replenishment mode for replenishing the oil in the compressor in the refrigeration cycle in the refrigerant recovery, washing and filling automatic apparatus of FIG. 3 is selected. In the compressor oil replenishment mode, Or when the waste oil discharge shown in FIG. 10 is completed, it is possible to perform them individually by inputting the command key. Of course, the compressor oil replenishment mode for replenishing the compressor oil in the automation apparatus of the present invention can be programmed to be automatically executed in any one of the refrigerant recovery mode, the washing mode, and the vacuum mode.

When the compressor oil replenishment command is applied, the compressor 40 in the refrigerant recovery, washing and filling automation apparatus of the present invention is driven and the valve 4 (S4) and the valve 2 (S2) are sequentially opened, A strong vacuum is generated in the section to the side port (HP). This vacuum acts inside the refrigeration cycle to generate a vacuum in a section from the low-pressure port (LP) to the new oil pipe (10), and new oil is drawn out from the new oil pipe (10) accordingly. In this process, as the valve 10 (S10) opens, the new oil flows into the refrigeration cycle through the low-pressure port LP and replenished to the compressor in the refrigeration cycle.

While the applicants have described various embodiments and modes of operation of the present invention, what has been described so far is merely illustrative of some of the preferred embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims.

Claims (20)

By using a single compressor and condenser without a vacuum pump and solenoid valves scattered throughout the piping for control of the flow, they are integrated into one block, which makes it possible to recover refrigerant from the refrigeration cycle, Wherein the valve integrated assembly is configured to integrate the lower valve body portions except for the upper solenoid portion of each of the solenoid valves to form one flat And a plurality of mounting grooves corresponding to the solenoid portions are formed on the assembly body so that the solenoid portions can be installed on the assembly body, Equipped with valve body The solenoids are configured to selectively open and close the central flow passages of the respective mounting recesses to control the flow of the refrigerant and the oil through the respective passages, Closing valves consisting of each pair of mounting grooves and solenoids are arranged in at least one row on the flat body of the valve integrated assembly having a constant thickness, A valve 2 connected to the high pressure side port of the refrigeration cycle by the refrigerant pipeline 2, a valve 3 connected to the oil separator 1 by the refrigerant pipeline 3, and a refrigerant pipeline 13 connected to the inside of the apparatus A valve 4 connected to the compressor, and a refrigerant pipeline 10 connected to the liquid refrigerant pipe of the refrigerant recovery tank in the apparatus Probe 9, and a refrigerant pipe line 9 by the refrigerant recovery, cleaning, and charge automated apparatus including a valve 16 which is connected to the gas refrigerant pipe of the refrigerant recovery apparatus, at least the tube. delete The method according to claim 1,
Wherein the valve integrated assembly is such that each of the mounting grooves is coupled to the solenoid portions in a screw-tight manner. delete The method according to claim 1,
The on / off valves are connected to a fresh water line by a refrigerant pipeline 19 and connected to a low pressure side port of the refrigeration cycle by a refrigerant pipeline 20, and a refrigerant pipeline 17 connected to the oil separator 1 and the oil separator 2 And connected to the oil separator 3 and the oil separator 4 by the refrigerant pipeline 15 and connected to the oil separator 4 by the refrigerant pipeline 16, And a valve (12) connected to the compressor in the apparatus. 6. The method of claim 5,
The oil separator 3 and the oil separator 4 are connected to each other by a refrigerant pipeline 15, the oil separator 3 is connected to the oil separator 1 and further connected to the compressor 40 by a line 6 (L6) 4 further comprises at least a structure in which an exhaust valve is provided on one side and is connected to the compressor in the apparatus by a refrigerant pipeline 14. The refrigerant recovery, 6. The method of claim 5,
The oil separator 1 and the condenser in the apparatus are connected to each other by a refrigerant pipeline 7, the condenser and the refrigerant recovery cylinder are connected to each other by a refrigerant pipe line 8, The oil separator 2 is connected to each other, and the oil separator 2 and the compressor in the apparatus are connected to each other by a refrigerant pipeline 5. The method according to any one of claims 1, 3, and 5 to 7,
Wherein a plurality of flow paths are selectively formed on the side surfaces of the assembly body through flow paths with the flow paths of the mounting grooves located on the upper surface of the assembly body. The method according to any one of claims 1, 3, and 5 to 7,
Wherein the connection passages, that is, the flow paths, between the flow holes formed in the assembly body are formed with a predetermined height difference to prevent them from overlapping each other. 9. The method of claim 8,
Wherein the valve (8) and the low-pressure switch (1) are arranged in this order on the line (11) which is connected to the peripheral flow passage of the valve (1) and enters the flow passage formed on one side of the assembly body. 9. The method of claim 8,
The three-way valve is connected to the valve 8 by the refrigerant pipeline 11, and the three-way valve is connected to the central passage of the valve 9, And a second outlet of the valve is connected to the valve (2) by a refrigerant pipeline (12). The method according to claim 1,
Wherein said refrigerant recovery, washing, vacuum and filling operations, and waste oil discharge and compressor oil replenishment operations are programmed to be performed individually or interconnected automatically. A method for recovering refrigerant from a refrigeration cycle using the refrigerant recovery, washing and filling automation apparatus according to claim 1,
Wherein the compressor in the apparatus is driven to generate a vacuum from the compressor to the low pressure side port and the high pressure side port of the refrigeration cycle;
The refrigerant being drawn out from the low-pressure side port and the high-pressure side port by the vacuum generation;
The refrigerant (gas) drawn out from the low-pressure side port passes through the line 1 and enters the valve 3 according to the opening of the valve 1. The refrigerant (liquid) drawn out from the high-pressure side port passes through the line 2, Into the valve 3 where the gaseous refrigerant and the liquid refrigerant are mixed;
The valve 3 is opened, the mixed refrigerant passes through the oil separator 1, passes through the oil separator 2, and the oil contained in the refrigerant is removed.
The refrigerant having passed through the oil separator 2 flows into the compressor, is phase-changed into a high-temperature and high-pressure gas state, and then transferred to the condenser. And
Wherein the high-temperature and high-pressure gas refrigerant passes through the condenser and is phase-changed into a high-pressure and low-temperature liquid state through heat exchange, and then stored in the refrigerant recovery cylinder along the line 8. A method of cleaning the inside of a refrigeration cycle after recovering refrigerant in a refrigeration cycle using the refrigerant recovery, washing and filling automation apparatus according to claim 1,
Wherein the compressor in the apparatus is driven to supply the gaseous refrigerant through the gaseous refrigerant tube of the refrigerant recovery tube and the liquid refrigerant through the liquid refrigerant tube of the refrigerant recovery tube;
The gaseous refrigerant bypasses the peripheral flowpath of valve 16 along line 9 to enter valve 9 and the liquid refrigerant enters valve 9 along line 10;
Advancing the liquid or gaseous refrigerant entering the valve 9 into the valve 5 (three-way valve) in response to the opening of the valve 9;
The refrigerant is delivered to the valve 8 through the first outlet in accordance with the first outlet opening / second outlet closing in the valve 5;
The refrigerant bypassing the peripheral flow passage of the valve 1 by opening of the valve 8 and entering the low pressure side port of the refrigeration cycle along the line 1;
The refrigerant flowing into the low-pressure side port flows along the refrigeration cycle, and the inside of the refrigeration cycle is washed and then drawn out to the high-pressure side port;
The refrigerant drawn into the high-pressure side port enters the valve 2 along the line 2;
The valve 2 and the valve 3 are opened and the refrigerant passes through the oil separator 1 and the oil separator 2 to remove the oil contained in the refrigerant;
The refrigerant having passed through the oil separator 2 flows into the compressor, is phase-changed into a high-temperature and high-pressure gas state, and then transferred to the condenser; And
Wherein the high-temperature and high-pressure gas refrigerant passes through the condenser and is phase-changed through a heat exchange to a high-pressure low-temperature liquid state, and then stored in the refrigerant recovery cylinder along the line 8. [ A method of cleaning the inside of a refrigeration cycle after recovering refrigerant in a refrigeration cycle using the refrigerant recovery, washing and filling automation apparatus according to claim 1,
Wherein the compressor in the apparatus is driven to supply the gaseous refrigerant through the gaseous refrigerant tube of the refrigerant recovery tube and the liquid refrigerant through the liquid refrigerant tube of the refrigerant recovery tube;
The gaseous refrigerant bypasses the peripheral flowpath of valve 16 along line 9 to enter valve 9 and the liquid refrigerant enters valve 9 along line 10;
Advancing the liquid or gaseous refrigerant entering the valve 9 into the valve 5 (three-way valve) in response to the opening of the valve 9;
The refrigerant entering the high pressure side port of the refrigeration cycle through the second outlet in accordance with the first outlet closing / second outlet opening in the valve 5;
The refrigerant flowing into the high-pressure side port flows along the refrigeration cycle, and the inside of the refrigeration cycle is washed and then drawn out to the low-pressure side port;
The refrigerant drawn into the low-pressure side port enters the valve 1 along the line 1;
The valve 1 and the valve 3 are opened and the refrigerant passes through the oil separator 1 and the oils contained in the refrigerant are removed while passing through the oil separator 2. The refrigerant having passed through the oil separator 2 flows into the compressor, Phase and then transferred to the condenser; And
Wherein the high-temperature and high-pressure gas refrigerant passes through the condenser and is phase-changed through a heat exchange to a high-pressure low-temperature liquid state, and then stored in the refrigerant recovery cylinder along the line 8. [ 16. The method of claim 15,
The supply of the gas refrigerant and the supply of the liquid refrigerant to the liquid refrigerant tube according to the opening of the liquid refrigerant tube are performed with a predetermined time difference Wherein the cleaning is performed by the cleaning means. A refrigeration cycle apparatus comprising: a refrigeration cycle unit for cleaning the inside of a refrigeration cycle using the refrigerant recovery, washing and filling apparatus according to claim 1, and for removing the remaining refrigerant remaining in the refrigeration cycle and the refrigerant- As a method of evacuating,
Wherein the compressor in the apparatus is driven to generate a vacuum in the lines between the compressor and the low-pressure side port and the high-pressure side port of the refrigeration cycle;
Withdrawing the residue from the low-pressure side port and the high-pressure side port of the refrigeration cycle by the vacuum generation;
Side port is moved along the line 1 and then enters the valve 4 in accordance with the opening of the valve 1. The remainder drawn out from the high-pressure side port moves along the line 2, Into the valve (4) according to the control signal; And
As the valve 4 is opened, the remainder passes along the line 13 to the oil separator 4 through the compressor, and the air contained in the residues is discharged to the outside as the exhaust valve of the oil separator 4 is opened And then transferring the residues back to the compressor. A method for filling a refrigerant in a refrigeration cycle using a refrigerant recovery, washing and filling automation apparatus according to claim 1,
The liquid refrigerant is supplied through the liquid refrigerant tube of the refrigerant recovery cylinder to enter the valve 9 along the line 10;
Advancing into the valve 5 (three-way valve) in response to opening of the valve 9;
The refrigerant being delivered to the valve 8 via a first outlet in accordance with a first outlet opening / second outlet closing at a valve 5; And
Wherein the refrigerant bypasses the valve (1) by opening of the valve (8) to enter the low-pressure side port of the refrigeration cycle and is filled in the refrigeration cycle. A method for discharging waste oil in a refrigeration cycle using a refrigerant recovery, washing and filling automation apparatus according to claim 1,
Withdrawing the waste oil from the oil separator 1 and the oil separator 2 together with the waste oil discharge command;
The withdrawn waste oil moves along the line 17 and enters the peripheral flow passage of the valve 11; And
And opening the valve (11) so that the waste oil flows into the waste oil sump along the line (18). A method for replenishing compressor oil in a compressor in a refrigeration cycle using a refrigerant recovery, washing and filling automation apparatus according to claim 1,
The compressor in the apparatus is driven with the compressor oil replenishment command to sequentially open the valve 4 and the valve 2, and a vacuum is generated in a section from the compressor to the high pressure side port of the refrigeration cycle;
Generating a vacuum in an interval from the low-pressure side port of the refrigeration cycle to the new flow, so that fresh oil is drawn from the new flow; And
And the new oil flows into the refrigeration cycle through the low-pressure side port in accordance with the opening of the valve 10, and replenished to the compressor in the refrigeration cycle.

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