FR2619614A1 - System allowing the hot water temperature of central heating boilers to be adjusted as a function of the atmospheric temperatures - Google Patents

Abstract

The present invention relates to an adjustment system which can be fitted to the majority of central heating boilers with a hot water circuit. Its principle is to adjust the temperature of the hot water circulating in the heating circuit as a function of the atmospheric temperatures. This invention is of interest above all to small installations, dwellings, for example, where, taking account of the installation cost price which must be low, the adjustment of the temperature of the hot water of the circuit is often not dealt with by manufacturers because it is complicated and costly with the majority of current techniques.

Description

DESCRIPTION
The present invention relates to an adjustment and control system adapting to the majority of central heating boilers with hot water circuit. Its principle is to regulate the temperature of hot water circulating in the heating circuit according to the outside temperatures.

 This invention is of particular interest to small installations, for example dwellings, where, taking into account the cost of installation, which must be low, the adjustment of the temperature of the hot water is often not approached by the manufacturers because it is complicated and expensive with most current techniques.

 The hot water temperature is usually adjusted manually by turning a selector knob called the aquastat. But nothing indicates to the user the positions which he must respect according to the outside temperatures.

 A good setting of the aquastat leads to a more regular heating therefore more comfort and a lower fuel consumption.

Description of the invention
Our system adapts perfectly to wall-mounted gas boilers but it can be used on any other boiler fitted with a manual hot water temperature selector.

 It consists of a disc a few centimeters in diameter (9 cm in the example we have chosen) which can be more or less large in order to fit on the fronts of boilers depending on the models.

 This disc has three rows of circular and concentric boxes (figure n "1): - In the boxes" temperature zones "(item A) are written the atmospheric temperatures.The position of these temperatures will be different for each model of boiler.

- In the hot water temperature boxes (item 15), the hot water temperatures produced by the boiler will be entered with at least three control points, a low temperature point, 45 degrees for example, a maximum temperature point, 85 degrees for example, and an intermediate temperature point, 65 degrees for example. These control points will be in different positions for each brand and type of boiler. It is necessary to have at least three control points if you want to make sure that the boiler aquastat is in good working order and that the boiler is able to produce the range of hot water temperatures. necessary for good heating in all seasons.

- The third row of boxes (mark C) corresponds to "markers" of concordances which will only be used in certain cases which we will see below.

NOTE: the circular shape is the simplest and most logical. However, any other form of the external contour of the device could be envisaged.

Use of the device
The most common is done by fixing it on the boiler behind the temperature selector button (in this case the row of "marker" boxes is not used).

a) Control of the acguastat and of the entire boiler
It will be necessary to make sure from time to time that the boiler produces the whole range of temperatures given by the manufacturer for the model considered. The figures on the device will therefore be different for each model of boiler.

They will depend on the manufacturer's data.

 There may be a large number of hot water temperature benchmarks, however, three are sufficient but necessary (minimum, medium and maximum).

b) Adjustment of the aquastat according to atmospheric temperatures
Thanks to a grid of correspondence between hot water temperatures and atmospheric temperatures that we have created, following thousands of readings, atmospheric temperatures are indicated on the device according to the position of hot water temperatures.

 The user only has to turn their aquastat button according to variations in atmospheric temperatures.

c) Use of reference boxes
When the boiler aquastat is located in a place where there is no room to put our device behind the selector button, we place the latter in any other position on the boiler or next to it and the 'we use the row of boxes "benchmarks".

 They correspond either to markers existing around the boiler's aquastat button, or to markers that are created (figure no. 2).

 The work of controlling the hot water temperatures produced by the boiler and adjusting the aquastat according to variations in atmospheric temperatures are then the same.

 In this case of use, our device can no longer be with concentric boxes, they can be longitudinal and parallel for example (Figure No. 3).

Claims (6)

 1) Device for adjusting the hot water temperature at the outlet of individual boilers according to the outside temperatures.  It is characterized in that it is often in the form of a disk of sufficient thickness, approximately 9 cm in diameter, or in any other form, pierced in its center with a hole allowing the passage of the selector button axis.  2) Device according to claim I characterized in that it comprises three rows of concentric boxes (Figure n "1) which have the function of indicating the hot water temperatures produced by the boiler according to the position of the selector temperatures, for a row, (reference B), the outside or atmospheric temperatures in agreement with those of hot water for a second row, (reference A), the third row being made up of reference boxes (reference C).  3) Device according to claims 1 and 2 characterized in that it is fixed on the front of the boilers behind the temperature selector button by any possible fixing means.  4) Device according to claims 1 to 3, characterized in that the number of boxes per row is defined by the conditions of use.  5) Device according to claims I to 4, characterized in that it may not be fixed behind the boiler temperature selector button if the location thereof does not allow it. It is then placed in any other position on the boiler or next to it and has a row of marks (Figure 2) which are transferred around the temperature selector button, to ensure consistency. It can then take any shape and the boxes can for example be longitudinal and parallel (figure n "3).  6) Device according to any one of claims I to 5 characterized in that it can be an integral part of the boiler (printed on the front thereof, for example).