The multi-row radiator with a controlled flow of heating medium

Field of the Invention

This invention relates to a multi-row radiator with a controlled flow of heating medium, in particular the multi-row heating plate unit with an inlet port and an outlet port of the 5 heating medium, with the first passing-through heating plate facing the heated room / space and with at least one heating plate situated behind said first plate intended for reducing flow of the heating medium for cutting or controlling the heating output, while said heating plates are mutually connected on the corner areas at their upper distributing channels by means of inflow fittings and/or a connecting set with the inflow fitting for the 10 inlet port of the heating medium and connected by the outflow fitting for the outlet port at lower distributing channels.

Description of the Prior Art

Currently, radiators, especially the heating plate units are manufactured as single- or multi- row units, inside of which a space for the flow of heating medium, which is usually heating

15 water, is provided. The heating medium is supplied to the individual heating plates from the inlet port through the supply outlets and flows always symmetrically in each of their heating plates, i.e. the same amount is directed in all heating plates, or asymmetrically, usually preferably in the first of the heating plates facing a heated room, using a system for flow distribution such as different screens, but there is always no possibility to control flow

20 ratio distributed among individual heating plates, or to shut off the relevant inlet, etc.

Moreover, the interiors of heating plates or those of other similar radiators are always hydraulically interconnected, so that it is impossible to control the flow of heating medium in a particular heating plate without having to influence the flow of the heating medium through the second or subsequent heating plates of the known mutually hydraulically

25 interconnected multi-row heating radiators.

One example of approach that consists in preferring higher heating output of the front heating plate facing the heated room with a multi-row heating radiator, is known from the published patent application (CZ PV 1998-2158), according to which the relevant double- row or multi-row heating radiator is preferably provided with a single inlet port, which is 30 connected only with the frontal heating plate facing the heated room. The heating medium, which flows through this inlet port, is distributed along the upper edge of the front plate and through suitably dimensioned feeding channels situated perpendicularly thereto, and which are preferably spaced equally in the frontal region 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 radiator. Consequently the front radiator plate 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 of the heating plate has a higher radiation ratio.

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

The obvious drawback of this arrangement is that the regulation of the reduced heating output of the second or subsequent heating radiator plates of the multi-row heating unit can not be controlled. 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 into all heating plates to be cooled down, the thermal performance 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 order to control the inflow of the heating medium into a multi-row radiator with regard to the specific conditions in its partial load mode as well to ensure achievable heating capacity and to increase the comfort of the heated space and especially to improve the system control, a solution (PCT/EP2008/002963) has been proposed, which uses another valve in combination with one of the upper supply outlets, connected to the inlet port of the heating medium whereby it is possible to direct the mass flow of the heating medium back to the second heating plate through an overflow connection, whereby the used outflow is provided with an inner separating screen.

A disadvantage of such a solution is the application of the 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 solutions did not prove enough in practice.

Nature of the Invention

The substance of the present invention is to improve the flow control method of the heating medium through the multi-row radiator, especially through the multi-row heating plate radiator that is equipped with inlet and outlet ports of the heating medium, usually with the first passing-through heating plate facing a heated room / space and with at least one subsequent heating plate situated in a row behind it with intended medium flow reduction for cutting down or controlling the heating output, and said heating plates are mutually connected on the corners of their upper distributing channels by means of inflow fittings and / or by a connecting set with an inflow fitting for inlet port of the heating medium and at lower distributing channels with an outflow fitting for the outlet port, whereby the specified task is achieved by the present invention, characterized in that any of the inflow or outflow fittings are designed as a divider with the internal interface intended for the separation of the heating medium flows either into or out off the individual heating plates, and which is to that end provided with an internal interface with two curved mutually separated channels and at least one of them is equipped with a throttling member, and / or a control element.

According to the invention, it appears advantageous that the interfaces of the inflow or outflow fittings are formed by a filling core of their central parts as an integral part of their casing. According to the invention, it appears advantageous that with regard to the current development and properties of plastic materials the interfaces of the inflow or outflow fittings are carried out by introducing an injection insert made of composite material in their central part, including the created curved and mutually separated channels and with a passing-through hole for the throttling member and / or control element.

The proposed invention provides advantageously a large number of various arrangements of the throttling member and / or the control element, as for example, this being formed by an axially movable cylinder together with the stem with a height exceeding the diameter of the curved channel, this being formed by a shaft connected to a rotary valve with an angularly arranged channel etc.

Another advantage is that the shaft of the throttling member and / or control element can be fitted - in several ways - with a hand knob, a thermostatic head action shaft, or an actuator spindle etc.

Description of the Drawings Further advantages and effects of the invention are apparent from the attached drawings, wherein they depict:

Fig. 1 : longitudinal section of the supply fitting with its internal interfaces with two mutually separated curved channels, whereby at least one of them is equipped with the throttling / control element protruding inside and operable from outside, Fig. 2: longitudinal horizontal section of a supply fitting drawn at the level of one of the curved channels showing a space for throttling / control element,

Fig. 3: side view of the supply fitting according to Fig.l,

Fig. 4: longitudinal section of the supply fitting with its internal interface with two mutually separated curved channels, whereby at least one of them is equipped with the throttling / control element protruding inside in a modified design of the rotary corner valve operable from outside,

Fig. 5: longitudinal horizontal section of the supply fitting drawn at the level of one of the curved channels showing a space for throttling / control element and its transversal profile, Fig. 6: schematic depiction of the two-row radiator showing the inlet of the heating medium from the inflow fitting into the radiator system and individual streaming of the heating medium flows between the mutually hydraulically not connected individual radiator plates and their controlled separated outflows from mutually separated channels through the outflow fitting and further through the shut-off fitting into the outlet port,

Fig. 7: schematic depiction of the two-row radiator showing the inlet of the heating medium from the connecting set in the inflow fitting and individual streaming of the heating medium flows between the mutually hydraulically not connected individual radiator plates and of their controlled separated outflows from the mutually separated curved channels through the outflow fitting and further through the shut-off fitting into the outlet port, and moreover showing the manually operable element on the body of the outflow fitting in the throttle / regulatory element arranged for it.

Examples of the Versions of the Invention

A multi-row radiator I with controlled flow of heating medium, in particular the multi-row heating plate unit is connected to the inlet port 2 and the outlet port 3 of the heating medium. The multi-row radiator i is usually conceived as having a passing-through first heating plate 4 facing a heated room / space and with at least one heating plate situated behind said plate intended for reducing flow of the heating medium for cutting or controlling the heating output. The heating plates 4,5 are mutually connected to each other on the corners at their upper distributing channels (not shown in more detail) by means of the inflow fittings 6 and / or by an inflow fitting 6 of the connecting set 7 for the inlet port 2 of the heating medium and at lower distributing channels (not shown in more detail) by an outflow fitting 9 for the outlet port 3. Other supply outflows 10j which interconnect the heating plates 4,5 at their corners, are blind. Any one of the inflow fittings 6 or outflow fittings 9 is designed for the purpose of controlling the flow of heating medium trough the multi-row radiator i as a divider with the internal interface intended for the separation of the heating medium flows either into or out of the individual heating plates 4,5, and which is provided to that end with an internal interface 11 with two curved channels 12, 13 , mutually separated and at least one of them is equipped with a throttling member, and / or a control element 14. Said interface ϋ of the inflow fittings 6 or the outflow fittings 9 is formed by filling core 15 in their central part as an integral part of their casing. Consequently it is obvious to experts in the field that the curved, hence the as example depicted angular channels 12,13 in the interface Π _. are in practice manufactured by drilling. Another example is that the interface JJ _. of the inflow fittings 6 or the outflow fittings 9 is formed by filling core 1_5 of their central parts, for example in the form of an injection insert (not shown here) made of composite material, including the created mutually separated curved channels 12,13. and with a through hole 16 for throttling and / or control element 14. The throttling and / or control element 14 is formed by an axially movable cylinder together with the shaft 17 with a height exceeding the diameter of the corresponding curved channel 12 or 13 (Fig. l) or it is alternatively formed by a shaft V7 connected to a rotary valve 18 with an angularly arranged channel 19 (Fig. 4, 5) etc. The manually controlled knob 20, or a shaft of a thermostatic head (not shown here), or a spindle of an actuator (not shown here) are assigned to the shaft 1_7 of the throttling and / or control element 14. The shaft 17 of the throttling and / or the control element 14 is sealed by a common seal, O-ring, etc. under the lock nut 2L

The function of the heating radiator 1 with controlled flow of the heating medium, in particular the multi-row heating plate unit with an inlet port 2 and an outlet port 3 of the heating medium, which are variably connected with said ports 2,3, by their inflow fittings 6 or their outflow fittings 9, is explained particularly in using Fig. 6, which depicts schematically the two-row radiator showing the inflow of the heating medium from the inflow fitting 6 in this particular radiator and several streams of individual flows of the heating medium through individual not hydraulically interconnected radiator plates 4,5 and their controlled separated outflows via mutually separated curved channels 12,13 in the interface 11 of the outflow fitting 9 and further, after having been mutually mixed, to the outlet through the shut-off fitting 22 into the outlet port 3.

The heating medium coming from the inlet port 2 and through the usual control valve 23, at present predominantly equipped with the thermostatic head 24, flows through the inflow fitting 6 in both heating plates 4,5 with a volume corresponding to their hydraulic resistance. The difference of the hydraulic resistance is created in the outflow fitting 9 as explained above, due to the interface 11 that is permeable in the direction of the outlet port 3 only and solely through its two mutually separated curved channels 12,Π, whereby one of them, for example the channel 12^ which is accordingly curved and which connects the socket 24 of the outflow fitting 9 with the rear heating plate 5, is somehow throttled or controllable or completely closable, etc., as it is obvious from the introducting description of such an outflow fitting 9 _^ respectively inflow fitting 6.

The heating radiator (Fig.7) works quite similarly, with the connecting set 7 for the so- called bottom connection of the radiator 1 on the here not depicted heating system with the connecting ports 2,3, routed from the floor of the heated room / space, etc.