The present invention relates to a connecting element with regulation providing connection of two heating plates of multiple radiator, in particular for the multi-row plate radiator when importance is given on a higher heating output of its front plate facing the heated room / space.

Description of the Prior Art

Connecting elements providing connection of two multi-row heating radiator plates are themselves known. The document DE 101 35 215 CI describes a heating plate radiator consisting of at least two heating plates. Here, the centre holes of the heating plates that are mutually offset are assigned in the longitudinal direction individually in angle or as T- shaped casings, connecting and attaching sleeves that are composed of spherical sections with connecting sockets. The flow distribution inside the attaching and connecting sockets makes sure that the heating medium streams seamlessly from the inlet into one of the heating plates and from other heating plate again to the outlet.

DE 299 80 186 Ul also describes a multi-row radiator with connecting elements. A shut- off insert with a closing element can be introduced into the connecting element. To enable the shut-off insert to carry out the function of a venting member, the end of the shut-off insert situated in the neck comprises a sealing plate with a through hole, which is closable by a sealing component carrying a spindle. On its front side, the shut-off element is provided with corresponding vent holes, through which the air can stream out through the sealing plate.

One example of approach that consists in preferring higher heating output of the front heating plate facing a heated room with a multi-row heating plate radiator is known from the published patent application (PV 1998-2158), according to which the relevant double- row or multi-row heating plate radiator is preferably provided with a single inlet port, which is connected only with the front heating plate facing the heated room. The heating medium, which flows through this inlet port, is distributed along the upper edge of the front heating plate and by means of suitably dimensioned feeding channels situated perpendiculary to them and that are preferably equally spaced in the frontal area facing the heated room. Regardless of whether the radiator is operated at full or partial load, the heating medium is in that way primarily supplied to the front heating plate and subsequently to the remaining heating plates of the multi-row heating plate radiator. Consequently, the front radiator plate with the same heating output will be warmer, thus presenting more pleasant touch feeling than existing systems. Preferably, this advantageous effect is even intensified by the fact that the front heating plate features a higher radiation ratio.

To facilitate the flow of heating medium from the front heating plate to at least one subsequent heating plate or similar items that are positioned behind it, at least one connecting element or possibly a tube is arranged in the system, and said connecting element is preferably situated at the bottom front corner area of the frontal radiator heating plate, from which then the partly cooled-down heating medium flows into the lower part of the second heating plate situated behind it or possibly into the subsequent plate in the case of the multi-row heating radiator. Regarding this second heating plate, the heating medium is supplied at first upwards to the upper longitudinal edge of the second or possibly the subsequent heating plate, where the liquid is again directed through the upper distribution channel provided, then it is supplied by means of perpendicularly attached flow channels to its second lower corner area with a connected outlet port. In such an arrangement, it is supposed that the heating medium transfers the greater part of its heat to said front heating plate, while entering, already partially cooled down, the second or subsequent heating plates, ensuring, in such a way, a reduced heating output.

The obvious drawback of this arrangement is that the control of the reduced heating output of the second or subsequent heating radiator plates of the multi-row heating unit can not be done. Another drawback of this solution consists in the fact that if compared with standard solutions of the multi-row heating radiators, where the hot heating medium streams equally in all heating plates to be cooled down, the heating output of the entire heating plate radiator is generally lower because the hot heating medium flows into the front heating plate at first while the second or subsequent heating plates are supplied with already cooled-down heating medium, thereby reducing the heating output of the second and possibly subsequent heating plates.

In terms of a controlled streaming of the heating medium into the multi-row heating radiator and with regard to the specific conditions in its partial load mode and in order to comply with achievable heating output and to increase comfort in the heated space and especially to improve the control possibility, a solution was proposed (WO 2009015706), which uses another valve in combination with one of the upper connecting elements that are connected to the inlet port of the heating medium, by means of which it is possible to direct the mass flow of the heating medium to the second rear heating plate through an overflow connection, and the used connecting element is provided with an internal screen. A disadvantage of the solution consists in using an overflow connection or overflow coupling, which significantly complicates and increases the production cost of multi-row heating radiators of such a design, and moreover, it causes problems with radiator cleaning for the end-user, and therefore the mentioned solution did not prove enough in practice. Nature of the Invention

The purpose of the invention is to improve the connecting elements used for multi-row radiators and to introduce a heating radiator with such a connecting element. The shut-off or control inserts integrated in the connecting elements should be manufacturable particularly easily and inexpensively while another objective is to improve the process of controlling the flow of heating medium through the radiator, in particular in case of the multi-row plate radiator with inlet and outlet ports for heating medium and usually with the first fully passable heating plate facing a heated room / space with at least one other heating plate that is arranged in a row behind it and said heating plate being designed for intended reduction of the heating medium flow for cutting down or controlling the heating output. This objective is achieved by a solution where the connecting element for connecting two heating plates of the multi-row radiator consists of conventinal lateral connecting sockets and of the first threaded connecting bushing, all arranged to form a T-shaped casing located around a central spherical part of the connecting element, said T-shaped casing having connected variably across the plane that is formed by the principal axes of the connecting sockets and the principal axis of the first threaded connecting bushing the second threaded connecting bushing to its central spherical part, whereby a common insert passes sealingly through both threaded connecting bushings, said insert being provided on one side with the first outflow hole emptying radially into the central spherical cavity of the connecting element and on the other side with the second outflow hole with the outlet in the form of a seat facing the second threaded bushing that is provided with an axially movable valve stem with sealing poppet.

The connecting element according to the invention constitutes a new concept of the flow regulation through the here not depicted heating plates of the multi-row plate radiator consisting in the fact that the outflow of the cooled heating medium from the front plate of the heating plate facing the room / space is essentially not regulated; it is continuous, while the outflow of the heating media from the rear plate of the heating plate radiator is regulated.

According to the invention, it appears particularly advantageous that the valve can be optionally fitted with manually controlled head, or thermostatic or motorised one of any standard.

In terms of manufacturability and manufacturing cost, according to the invention it advantageous that the connecting element is made as a single workpiece or moulded part.

In terms of external shape parameters, and in terms of assembling process, it is advantageous that the connecting element can form a part of the valve group regardless of whether it is the case of a multi-row plate with a bottom, central or side connection etc. Description of the Drawings

Further advantages and effects of the invention are apparent from the attached drawings, wherein the individual figures depict:

Fig.l Oblique view of the connecting element in the exploded condition, with an adjacent conventional valve.

Fig.2 longitudinal cross-section of the connecting element with the common insert and its first threaded connecting bushing, indicating the course of the outflow of the heating medium into the cavity of the spherical part of the connecting element as well the drain into the first threaded bushing,

Fig.3 cross-section of the connecting element with the valve situated in the second threaded connecting bushing,

Fig.4 longitudinal cross-section of the connecting element with the inserted valve stem, Fig.5 cross-section of the connecting element with a part of the valve group for the connection adapted for the bottom connection of the multi-row radiator,

Fig.6 longitudinal cross-section of the connecting element with the ground plan view of the valve group part.

Examples of the Versions of the Invention

The connecting element 1 for mutual connecting of at least two heating plates (here not depicted) of the multi-row radiator consists of conventional lateral connecting sockets 2,3 and of the first threaded connection bushing 4, which are arranged to form a T-shaped casing around a central spherical part 5 of the connecting element , whereby the second threaded connection bushing 6 is connected to its central spherical part 5 _± such an interconnection being made across the plane formed of the principal axes of the lateral connecting sockets 2,3 and of the principal axe of the first threaded connection bushing 4.

A common insert 7 passes sealingly through both lateral connecting sockets 2,3, said common insert 7_being provided with the first outflow hole 8 emptying with its radial outlet 9 into cavity JjO of the central spherical 5 part of the connecting element 1 on one side and on the other side with the second outflow hole ϋ with the outlet in the form of the seat 12 facing the second threaded bushing 6 that is provided with a valve 13 and the axialiy movable stem 14 with the sealing poppet 15. The fixation of the common insert 7 in the lateral connecting sockets 2,3 can be done by soldering, welding, rolling etc., after its previous relevant fixture. The connecting element \ according to the invention constitutes a new concept of the flow regulation through the (here not depicted) heating plates of the multi-row plate radiator consisting in the fact that the outflow of the cooled heating medium from the front plate of the heating plate radiator is essentially not regulated; it is continuous across the radial outlet 9 of the first outflow hole 8 into the cavity 10 of the central spherical part 5 of the connecting element I and from it further continues into the first threaded bushing 4 of the (here not depicted) outflow port of the cooled-down heating medium, while the outflow of heating medium from the rear radiator plate is regulated by the stream volume through the second outflow hole Π _. with the seat 12 and from behind the sealing poppet 15 that is controlled by the valve 13 into the cavity 10 of the central spherical part of the connecting element , wherein both return flows of the heating medium are mutually mixed in a preset ratio before discharging to said (here not depicted) outlet port through the first threaded bushing 4.

The obvious advantage is the guaranteed heat output and particularly a thermal comfort as far as the radiant component of the heating plate of the multi-row radiator facing into the heated room / space is concerned, while the second or following heating plates of the multi-row radiator may be regulated effectively in terms of heat output depending on environmental conditions. It is of advantage that the internal arrangement of the connecting element 1 allows the application of the valve 13. with an axialiy movable stem 14 and the sealing poppet 15, which can be without further adjustments optionally equipped with (here not depicted) a hand-operated knob, or a thermostatic or motorised head of any standard, that is to say without any design problem caused by conversion of the previously proposed rotational movement of the stem 14 of the valve 13 into straight movement. A common insert 7, essentially constituted by a simple single-piece and at least partially calibrated cylinder, may be manufactured as a workpiece of suitable metal or made of moulded heat-resistant plastic or the like, wherein further processing such as the creation of holes 8,11 and seat 12 presents an easily and simple operation of current machining or injection in case of using plastic. It is assumed that the openings in the lateral connecting sockets 2,3 are properly calibrated during the manufacturing process, for example by reaming, etc.

When assembling the valve group 16, the connecting element 1 is readily applicable due to its technical simplicity, and for its achieved effects in so-called valve groups 16 applications, said valve groups 16 being widely used for multi-row radiators due their simple adaptation for bottom, middle and / or lateral connection at (here not depicted) inflow and outflow floor ports of the heating system.

Detailed function description of all different variants of arrangement of the connecting element 1, as well as its integration into various connection systems of the multi-row radiator, equipment with additional elements, actuators, etc., is not here described in detail, because the topic is familiar for experts in the field.