ES2298070A1 - Compact, automated unit for discharging and recharging gases of an installation - Google Patents

Abstract

Compact, automated unit for discharging and recharging gases of an installation which consists of a single framework structure (1) formed by at least individual lateral casings (1a), there being between same: a) a lower level, which is a support for scales (2) for a gas-recharge cylinder (3) b) an intermediate level, which is a support for a plurality of regulation components for a discharge circuit (C1) with an exterior intake (8) towards a vacuum pump (8a) and a gas-recharge circuit (C2) with an outer connection (11) towards the gas-recharge cylinder (3), and there being a communication (U) between the two discharge (C1) and recharge (C2) circuits that communicates with the installation (7a) via a single exterior connection (7b) c) an upper level, with a display (61) for pre-selecting the discharge and charge values and for displaying errors during work, which is associated with programmable CPU (6).

Description

Compact and automated unit for vacuum and gas refilling of an installation.

The object of the invention is a compact unit and automated, for vacuum and refill of gases of an installation.

Gas emptying is necessary, and prior step, for example to clean cooling systems. With Regardless of its specific use, gas refilling is necessary, as a final step, after maintenance of this type of facilities.

Discharge and fill assemblies for systems  refrigeration are known and described in, for example, the US5715692 and EP1197712.

Unresolved problems in known gas discharge and recharge assemblies lie precisely in that they are assemblies and not compact units, which implies the handling of the components separately, with the consequent multiplication of connections and wiring, which have to be coupled " in situ " and the commissioning of these components also separately and with a fully autonomous operation between them.

The unit object of the invention exceeds these limitations and problems because it is compactly structured and automated operation; which greatly reduces both components (avoiding duplicities or multiplicities) like the wiring and the conduits between them.

The compact unit object of the invention is Presents as an authentic portable machine with fixed connections and internal between components, with the particularity that a single driving, depending on the phase or the moment, acts as discharge conduction, vacuum conduction or recharge conduction of gases

Its structuring allows to work easily with any type of refrigerant gas, in the most simple.

To better understand the purpose of this invention, a preferred form of practical realization, susceptible to accessory changes that do not distort its foundation.

Figure 1 represents a general scheme of the compact and automated unit, for vacuum and gas refilling object of the invention, with its basic components and its inter-relationship between them.

Figure 2 represents a general view in perspective of the compact unit object of the invention.

Figure 3 represents a front view corresponding to figure 2.

Figure 4 represents a section, according to indication B: B of figure 3.

Figure 5 represents a section, according to F: F indication in Figure 3.

An example of practical, non-limiting embodiment of the present invention.

The object of the invention is a compact unit and automated, for vacuum and refill of gases of an installation that, according to the embodiment represented it consists of a single frame-structure (1) composed of at least two lateral carcasses (1st); disposing among them a level lower, an intermediate level and a higher level.

The lower level consists of a lower plate (1b) constituted in support of a scale (2) removable for a gas refill bottle (3).

The intermediate level consists of a sheet intermediate (1c) constituted in support of a plurality of regulation components of

- a circuit for vacuum (C_ {1}) with a socket outside (8) towards a vacuum pump (8a);

- a gas recharge circuit (C2) with an external connection (11) to the gas refill bottle (3), and providing a communication (U) between both circuits to empty (C 1) and recharge (C 2) that communicates with the installation (7a) by a single external connection (7b).

These regulation and control components are, at least a plurality of solenoid valves (4a), (4b), (4c); a pressure switch (4d), and a vacuestate (4e).

All solenoid valves (4a), (4b), (4c) are Unidirectional anti-return.

The pressure switch (4d) is arranged in a multifunctional driving (7). The vacuestato (4e) is arranged in the outer socket (8) between two solenoid valves (4b), (4c), one of which (4b) is arranged between the pressure switch (4d) and the Vacuestate (4e).

Each of these elements - valves (4a), (4b), (4c), pressure switch (4d) and vacuestato (4e) - are provided with direct connection to a control CPU (6).

Said regulation and control components (4a), (4b), (4c), (4d), (4e) connect to each other in the manner described and involve, at least:

- the external connection (11), through which access gas from a gas bottle (3); being this driving unidirectional input per solenoid valve action (4a)

- the external socket (8) with vacuum pump (8a), this unidirectional output conduction being per action of solenoid valve (4c)

- a single external connection (7b) to the installation (7a) to be downloaded or recharged; being this bidirectional connection: acts as input conduit for perform the discharge and vacuum when the solenoid valves (4b), (4c) are open and acts as an outgoing conduit to perform the gas refill when at least the solenoid valve (4b) is closed

- a direct connection (12) between I to CPU (6) and said scale (2)

- an auxiliary socket (10) that is used, for example, to connect the vacuum pump (8a) indirectly to the power supply network; so with a single power supply (9) other connections are possible through sockets auxiliaries (10).

Particularly, the bottom plate (1 b) is It is a support for the scale (2) which is removable for place the gas refill bottle (3) in it. In position of transport or "no use", the scale (2) remains housed in the unit, retained by a front clip (C) - see figures 2 and 3-.

Particularly, the vacuum pump (8a) is of Double effect.

On the upper level there is a front display (61) to preselect the vacuum and load values, and to visualize errors during work; going said display (61) associated with a programmable CPU (6) that controls the elements of the unit and on them, between both side covers (1a) it has an upper crossbar (1d), constituted in a handle of transport.

Through said programmable CPU (6) also both the work phases and one or several phases can be programmed weights on the scale (2) with which, due to difference in weights, manages to accurately pre-determine the amount of gas to be used in the recharge of the installation.

Claims (5)

1. Compact and automated unit for vacuuming and refueling of an installation, characterized in that it consists of a single frame-structure (1) composed of at least two lateral housings (1a), including: a) a lower level consisting of a sheet bottom (1b) constituted in support of a scale (2) for a gas refill bottle (3); b) an intermediate level consisting of a sheet intermediate (1c), constituted in support of a plurality of regulation components of

b_ {1})

a circuit for vacuum (C 1) with an external socket (8) towards a vacuum pump (8a);

b_ {2})

a gas recharge circuit (C_ {2}) with an external connection (11) to the bottle of gas recharge (3), and providing a communication (U) between both circuits for vacuum (C1) and recharge (C2) that are communicates with the installation (7a) by a single external connection (7b);

c) a higher level where frontally it has a display (61) to preselect the vacuum values and load, and to visualize errors during work, associated with d) a programmable CPU (6) that controls the unit elements. 2. Compact and automated unit for vacuuming and refueling of an installation, according to the preceding claim, characterized in that said regulation and control components are at least one pressure switch (4d), a vacuestate (4e) and several solenoid valves (4a) , (4b), (4c); the pressure switch (4d) being arranged in a multifunctional line (7); the vacuestate (4e) in the external socket (8) between two solenoid valves (4b), (4c); and solenoid valves one (4a) in the external connection (11), another (4c) in the external socket (8) and the other (4b) between the pressure switch (4d) and the vacuestate (4e); and each of these direct connection elements to the control CPU (6) being provided. 3. Compact and automated unit for vacuuming and refueling of an installation, according to previous claims, characterized in that in said lateral housings (1a) of the frame structure (1) an upper cross member (1d) constituted as a handle for transport the compact unit. 4. Compact and automated unit for vacuuming and refueling of an installation according to claim 2, characterized in that the valves (4a), (4b), (4c) are unidirectional anti-return. 5. Compact and automated unit, for vacuum and gas refilling of an installation, according to previous claims, characterized in that the vacuum pump (8a) is double acting.