ES2212882A1 - Heating, ventilation and air-conditioning system for use in building, has condensing unit fixed to roof of building, casing connected to roof, and centrifugal fan incorporating relevant protective grid - Google Patents

Abstract

The system (1) has a metal conduit condensing unit (2) provided with a centrifugal fan, and a compressor (3) and an evaporator unit (4) connected to connection lines. The condensing unit is fixed to a roof (5) of a building. A casing is connected to the roof. The fan incorporates a relevant protective grid. An intercommunicating duct (4a) circulates coolant. A condenser is placed near an outlet (7) of the coolant.

Description

Building air conditioning system with modular independent condenser.

Object of the invention

The present invention relates to a system of building air conditioning with independent condenser modular, installation in tight spaces.

Background of the invention

The air conditioning systems used currently they can have two configurations, either split or compact

The split configuration comprises a unit external installation motor condenser, usually on the facade, and an indoor evaporator unit, and frequently there are location problems for unit installation motocondensadora, since its placement in main facades produces a very unfavorable aesthetic appearance, and often It raises discussions among the neighbors of a community. Furthermore, if these are premises or homes on the ground floor, the motor condenser it cannot be placed on main facades, and frequently these properties have access difficulties for the installation of this  element in inner courtyards, either by remoteness, by absence of patio or by refusal of the community of neighbors.

The compact systems meanwhile integrate the condenser, evaporator and compressor in a single element, which It presents problems of location due to its volume and weight. Additionally they also represent an increase in the installation of supply, return and air inlet and outlet ducts and the consequent load losses associated with changes of address of them, which impairs performance. Also also They have higher maintenance costs.

Description of the invention

The system of the invention, by its constitution and  use, serves in an optimal way for the air conditioning of buildings, avoiding the problems and inconveniences described of the compact systems and current matches.

According to the invention, the system it comprises at least one modular condensing unit, a motocompressor, at least one conventional evaporator unit and ducts that connect these elements to each other and through which it circulates the refrigerant, the condensing units being constituted, the motocompressor and the evaporating units by physical elements independent of optimal location in the most suitable location to improve system performance.

The modular condensing unit is constituted by a housing inside whose ducts are arranged Tubular metal, ideally copper, fin-related also metallic, preferably aluminum. In the housing there is also at least one electric fan, centrifugal in case location far from the intake air intake, or radial otherwise, with its corresponding grid of protection.

In the case of a radial fan, it is placed obliquely to the unit fixing plane, ideally a roof, which allows a larger size of the blades with a moderate height, to generate a greater air flow and substantially parallel to said unit fixing plane, and with a height that allows concealment by means of a false the ceiling.

The condensing unit incorporates at least double the coolant inlet and outlet ducts, to enable its modular coupling in parallel with others units, so that heat exchange can be increased to base of adding simple modular elements of lower cost and size.

It also incorporates tube temperature probes and  environment for condensation and defrost control and tray condensation collection.

The motocompressor unit integrates at least one compressor, a four-way valve, expansion valves and control of the refrigerant circuit, a liquid reservoir, as well as of electronic and electrical control and accessory elements of control.

In this way, and because of that fundamentally to the segregation of the condenser unit motor compressor, and at the bottom profile of this one, installations can be made in spaces reduced, such as suspended ceilings, without increasing the space on them, with optimal placement of the elements, a minimum maintenance, a low noise level and a great  versatility and low cost due to the modularity of the unit condenser, which allows, thanks to its modular coupling with various analogues, adapt to various exchange needs of hot.

Brief description of the drawings

Figure 1 schematically shows the system of the invention

Figure 2 shows a perspective view of the condensing unit of the system of the invention.

Figure 3 shows a plan view of the condensing unit of the system of the invention.

Figure 4 shows the section by IV-IV of Figure 3.

Description of a practical embodiment of the invention

System 1 of the invention is constituted by  a modular condensing unit 2, a motocompressor 3, at least, a conventional evaporator unit 4 and the ducts 4a that intercommunicate for the circulation of the refrigerant, being the three physically independent elements 2, 3 and 4.

The condenser unit 2 is low height due to its internal structure, and is fixed to the roof 5 of the building, being hidden by a false ceiling 6. The physical separation with the other elements of the system, allows to locate the unit 2 the most possible close to the air intake 7 that will be forced circulate through it to exchange heat in the refrigerant.

Unit 2 comprises a housing 8, through which is fixed to the ceiling 5, copper conduits 9 of coolant circulation, aluminum fins 10 that relate the conduits 9 and favor heat exchange, and an electric fan 11, oblique to the ceiling, that is, to the plane of fixation of unit 2, and generator of an air flow through the ducts 9 and fins 10 in a direction substantially parallel to the ceiling 5. The oblique position of the fan allows the use of large blades, generating a higher flow, in a reduced height

The fan incorporates the corresponding 12 protection grid. This embodiment with a fan radial will be of preferred use when the condensing unit can be placed near the socket 7, being, otherwise, of preferred use a centrifugal fan.

Unit 2 also incorporates ducts 13 duplicate coolant inlet / outlet, which allows couple several units 2 modularly to get more heat exchange

Claims (4)

1. Air conditioning system in buildings with a modular independent condenser, of the type consisting of at least one condensing unit with metal coolant circulation ducts, interrelated by means of metal fins with at least one radial fan or Centrifugal, a motocompressor and an evaporator unit in addition to the connecting ducts of these elements and circulation of the refrigerant, integrating the corresponding electrical and / or electronic valves and control; characterized in that the condensing units, motocompressor and evaporating units are physically independent elements of installation in the place of greater performance of the system. 2. System according to claim 1 characterized in that the condensing unit incorporates at least duplicate inlet and / or outlet coolant ducts for modular coupling in parallel with other condensing units for greater heat exchange. 3. System according to claim 2 characterized in that the fan of the condensing unit is radial and is arranged obliquely to the fixing plane of the unit. 4. System according to claim 1 characterized in that the condenser unit fan is centrifugal.