FR2760824A1 - CENTRAL AND AUXILIARY CONTROL HEATING AND HOT WATER PRODUCTION SYSTEM - Google Patents

Abstract

Heating installation for heating and producing domestic hot water supplying individual heaters, comprising a boiler (1) with an outward (3) and return (4) column. The boiler is controlled by a control (2) with a temperature program for the heat transfer fluid. Each individual installation comprises users (U1, U2) supplied separately from a valve (104) controlled by an actuator (105) at from an auxiliary control (122) in which threshold temperatures (TCHM, TCHm, TECSM, TECSm) are programmed as a function of the detected temperature of the heat transfer fluid giving operating authorizations for the various users, these being by otherwise controlled by signals provided by sensors (113, 121). The controller (122) also receives flow rate and temperature difference signals from the fluid in the users (U1, U2) to determine consumption.

Description

I The present invention relates to a heating installation for the

  heating and / or domestic hot water supplying several individual heat transfer fluid circuits from a central heating source, - these individual circuits being connected in parallel between the

  go column and return column of the source cen-

trale,

  - the central source supplying heat transfer fluid to a

  bit and at a constant temperature at all circuits indi-

  - each individual circuit including:

  - a valve having an inlet connected to the flow column, more

  several outputs, a controlled actuator communicating

  tion the inlet with only one of the valve outputs, without overlapping between the outputs, - the individual circuit without any flow control means being fed through the valve and connected to the return column and comprising a user producing some water

  domestic hot water and / or one or more users of hot water

  fage, these users being associated with a respective output

  of the valve, as well as a direct return circuit

  one of the valve outputs to the return column.

  We already know such an installation (FR

94 13082).

  The object of the invention is to improve this ins-

  tallation to facilitate operation at the level of individual heating circuits and centralized management of

individual consumption.

  To this end, the invention relates to an installation of the type defined above, characterized in that it comprises: - a main control controlling the central heating source to control the temperature of the heat transfer fluid according to a program defined according to authorizations of user operation, - an auxiliary control associated with each individual circuit

  to control the supply of heat transfer fluid to utilities

  sators according to setpoint signals as well as signals supplied by the sensors giving the state of the users, this auxiliary control itself receiving its instructions in the form of the temperature signal of the heat transfer fluid detected at the input of the individual circuit by a temperature sensor. The user operating authorization limit temperatures are integrated into the control

  auxiliary of each individual circuit.

  By controlling the temperature of the heat transfer fluid

  by the main command, you can authorize or inter-

  say how a particular user works

  either the request for the operation of these users

  teurs. Thus, domestic hot water production will only be

  allowed only during given time slots, e.g.

  full in the early morning, mid-day and in the evening. As the production of large quantities of water

  hot is only necessary at this time, there is no need to

  limit or authorize the supply of heat transfer fluid to these

  users producing hot water during other per-

  riodes of the day, especially as the temperature of the heat transfer fluid for the production of domestic hot water

must be high.

  It is the same for the supply of the heating circuit. If this heating circuit is underfloor heating, as the temperature of the heat transfer fluid must not be higher than a limit, in general very low, this circuit must not be supplied directly with heat transfer fluid when the temperature of the heat transfer fluid is better than

a certain limit.

  But it is not a problem that the heating circuit

  soil fage, which proceeds by accumulation, is not fed

  mented during the periods, necessary for the possible supply of uses requiring a heat transfer fluid to a

  much higher temperature.

  Conversely, this avoids intermediate heat exchangers or mixing valves, generally of a complicated structure, operation and adjustment, which would supply the underfloor heating circuit with a

  fluid of suitable temperature but obtained from the heat transfer fluid at a much higher temperature. User power permissions from-

  using a high temperature heat transfer fluid

  according to the order of priority integrated in the auxiliary command

  liary. According to other advantageous features of the invention: at least some of the users must operate only

  if the temperature of the heat transfer fluid is higher or lower

  lower than a value or between two values, these

  general limits being recorded in the auxiliary control; - each user is provided with an inlet temperature sensor and an outlet temperature sensor as well as

  a flow meter supplying their signals to the auxiliary control

  to manage the energy consumption of each user

  sator; - the main control receives its temperature programs

  in the form of daily programs.

  The installation according to the invention allows very efficient management of individual heating, avoiding losses in the main flow circuit and back, by the precise adaptation of the temperature of the heat transfer fluid to the needs of users and the periods of operation

  from the main boiler or from the heat transfer fluid.

  The installation allows management and accounting

  Remote reading of the consumption of each individual circuit

  through the measurements of user inlet and outlet temperatures and the flow of heat transfer fluid through

the users.

  Finally, the circuit in no way penalizes the use of

  tion of the individual circuit, leaving each user

  take care to determine the temperature of the hot water it

  temperature and the heating temperature by adjusting the

room sensor.

  The present invention will be described in more detail using an embodiment of an installation

  heater shown schematically in the drawings an-

  attached in which: - Figure 1 is a view of an installation showing the central source and an individual circuit, - Figure 2 is a diagram of a primary fluid program for an outside temperature below 5

  and individual circuits equipped with hot water tanks

nitaire,

  - Figure 3 is an analog programming diagram

  gue to that of FIG. 2 for an outside temperature between 5 and 15, for individual circuits fitted with a hot water tank, - FIG. 4 is a diagram for programming the temperature of the primary fluid for individual tours

  equipped with domestic hot water tanks, for operation in summer.

  According to FIG. 1, the invention relates to an installation

  heating lation for heating and / or domestic hot water production. This installation consists of a source

  central heating unit 1 for example a boiler or a heat exchanger

  geur supplied from a district heating network.

  This central heating source 1 is controlled by a main control 2 according to programs which will be

explained later.

  The central heating source 1 supplies a co-

  go to 3 and a return column 4. The different circuits

  individual cooked are connected in parallel on the column

  go 3 and return column 4. An example of such a cir-

  cooked is represented between levels 5 and 6.

  The individual circuit is composed at the inlet of a stop valve 100 which makes it possible to cut the circuit and at the outlet of a stop valve 101 also forming the valve

circuit balancing.

  Downstream of the stop valve 100, the circuit is re-

  linked to a temperature sensor 103 which detects, for control, the temperature of the input heat transfer fluid. The

  sensor 103 provides a temperature signal S1.

  Downstream of the temperature sensor 103, the inlet pipe 102 is connected to a multi-way valve 104 (a)

  (b), (c) equipped with an actuator 105.

  This valve with several outputs 104 supplies the users of the individual circuit or makes it possible to short-circuit

these users.

  The first user Ul is a domestic hot water tank connected by the inlet pipe 106 to the outlet

  (a) of the valve 104. This pipe 106 is equipped with a cap-

  input temperature sensor 107 providing a time signal

temperature S2.

  At the outlet, the heat transfer fluid circuit,

  pouring the user Ul, is connected by a line 108 to the return line 109- via a flow meter 110 and a temperature sensor 111. This circuit can be cut

  by a stop and drain valve 112.

  The temperature sensor 111 provides a signal S3.

  The user Ul is also equipped with a temperature sensor 113 immersed in the liquid to be heated (water

  hot) and which provides a temperature signal S4.

  User Ul receives hot water through inlet 114 and supplies this hot water on demand through the

exit 115.

  The circuit also includes a user U2, for example a radiator circuit or a coil circuit

  for underfloor heating connected to the outlet (b) of valve 104.

  It can also include both circuits but

  this possibility is not shown.

  The second user U2 is supplied from the valve 104 by an inlet pipe 115. This pipe is provided with a temperature sensor 116 providing a temperature signal S5. The heat transfer fluid circuit passes through the user U2 (for example a set of radiators) and leaves it via the outlet pipe 117 equipped with a flow meter 118, a temperature sensor 119 providing a signal of

  temperature S6 and a stop valve 120 allowing draining.

  This outlet is also connected to the outlet pipe 109.

  The user circuit U2 is equipped with a temperature sensor or room thermostat 121 which detects the temperature

  temperature in the premises to be heated. The temperature sensor 121 provides an S7 output signal.

  Finally, the outlet (c) of the valve (104) is connected directly to the return pipe by the pipe 130.

  In general, the valve has as many outputs a, b, c, etc. that there is a user Ui requiring an independent command as well as a direct output to the return line10 109.

  The installation includes an auxiliary control 122 in each room which receives the various signals, namely:

  - Sl: the signal representing the temperature of the heat transfer fluid-

  tor at the input of the individual circuit (line 102), - S2: the signal from the temperature sensor 107 (hot sensor) of the heat transfer fluid at the input of the first user U1,

  - S3: the temperature signal supplied by the temperature sensor

  erase 111 (cold sensor) at the user exit

U1,

  - S4: the signal from the hot water temperature sensor 113 of the user Ul,

  - S5: the signal from the temperature sensor 116 of heat transfer fluid

  hot carrier at the input of the second user U2, - S6: the temperature sensor signal (cold sensor) 119 at the output of user U2, - S7: the signal supplied by the temperature sensor

121.

  The control circuit 122 also receives either 3 (directly or programmed) the system control limit signals such as: the maximum DHW temperature TECSM, - the minimum DHW temperature TECSm, - the maximum heating temperature TCHM

  - the minimum heating temperature TCHm-

  The circuit 122 can also receive the temperatures

  set points for domestic hot water and heating.

  These signals can be adjusted on sensors 113 and 121 and

  be supplied in parallel to the S4 and S7 signals supplied by these sensors.

  The sensor 103 is intended to prohibit the supply of heat transfer fluid to a given user circuit when the temperature of the input heat transfer fluid (Si) does not

  does not meet certain temperature conditions.

  For example, if the user circuit U2 is a floor heating circuit, as the floor temperature must not exceed a very low limit, it is necessary to prohibit the supply of this circuit as soon as the temperature of the fluid

  coolant exceeds a predetermined threshold.

  Similarly, if the temperature of the heat transfer fluid, measured by the sensor 103, is too low, that is to say less

  at least lower than the temperature set for domestic hot water, the heat transfer fluid must be prevented from passing through user U1 because this heat transfer fluid would heat up

  in user Ul and would cool the liquid.

  The circuit 122 also receives the signals S8, S9

  flow meters 110, 118, which allows management of the

  summation in calories, either by display on circuit 122,

  or by remote transmission of this information.

  The central source 1 is controlled by a control circuit 2 which contains different temperature programs

  (water programs) depending on the outside temperature.

  In general, in a circuit of

  heating combined with a domestic hot water production circuit

  shut down, the use of very punctual or very short-lived domestic hot water has priority over heating

  premises due to the very great inertia of such heating

fage.

  The program (s) of control circuit 2 are

  represented by a disk 200, 300, 400, examples of which are given

born in Figures 2, 3, 4.

  According to FIG. 2, the disc 200 has plates

  boiler outlet temperature setting ges 1.

  These time adjustment ranges define temperature levels.

cross out for the heat transfer fluid.

  There is a range 201 at a temperature of 50 between 11 p.m. and 5 a.m. (night temperature) and a range 202 at between 5 a.m. and 11 p.m. (daytime temperature) This temperature program applies to an individual circuit including a domestic hot water preparation station and a

  heating circuit by radiators.

  The choice of temperature levels allows the

  operation of users U1 and U2, however respecting

  minus the priority of user Ul over

  user U2. Priority is ensured by the auxiliary command

liar 122.

  Figure 3 corresponds to a program for a

  Intermediate outside temperature range, between and 15. This program is intended for an individual circuit equipped with a domestic hot water preparation station and a radiator heating circuit. This program, explained on disk 300, includes a range 301 of temperatures

  set at 40 corresponding to the period between 11 p.m.

  res and 5 hours (night temperature) and a range of 65 between

  5 a.m. and 11 p.m. (daytime temperature).

  The comparison of this program and that of the disc in Figure 2 shows that the heat transfer fluid supplied by the central heating source is in the two ranges at a

  lower temperature in program 300 since the temperature

  the outdoor temperature is lower, the heat demand at

  heat transfer fluid is less important.

  Figure 4 shows a program 400 for,

  summer period, or more generally when the heating is neither

  desired or authorized, the choice of the temperature of the fluid

  the carrier makes it possible to prohibit, always via the sensor 103 and the signal If it sends to the control circuit

  122, the operation of the radiators.

  The program shown in Figure 4 includes

  three high temperature ranges 401, 402, 403 correspond

  in the hourly periods of five to eight hours, eleven to four

  ten o'clock, seventeen to eight o'clock. At this moment, it is necessary that

  the domestic hot water preparation station can be

  lied. In the intervals, the temperature is close to the ambient temperature, i.e. 20. The heating is stopped night and day. This example shows that if the minimum temperature for the heating circuit supply is fixed at 70 or 80, as the temperature of the heat transfer fluid is lower than this limit, only the domestic hot water preparation station (tank hot water) can be supplied by the corresponding positioning of the valve 104 by the actuator 105 controlled by the

auxiliary control 122.

  The installation according to the invention is easily installed on existing installations, that is to say installations equipped with a boiler, a flow column and a return column as well as circuits individual supplying users Ul (hot water tank) and U2 (boiler circuit) or Ui (other heating circuit). It is enough simply to interpose the various valves whose

  valve 104 and the temperature sensors as well as the flow

  and the central control installation.

  This circuit has the advantage of not requiring

no connection with the boiler.

  Transmission of metering information for remote management can be done by telephone line

  usual from auxiliary control station 122.

Claims (2)

R E V E N D I C A T ION S   1) Heating installation for heating and / or heating   domestic hot water supply supplying several circuits   individual heat transfer fluid from a central source   heating section (1), - these individual circuits being connected in parallel between the flow column (3) and the return column (4) of the central source (1), - the central source (1) supplying fluid one heat carrier   constant flow (d) and temperature (t) at all circuits   individual cooked - each individual circuit comprising: - a valve (104) having an input connected to the flow column (3), several outputs (a, b, c), a controlled actuator (105) connecting the input with only one of the valve outputs (a, b, c), without overlapping between the outputs, - the individual circuit without any means of flow control   being supplied through the valve (104) and connected to the co-   return column (4) and including a user (U1) product   sanitary hot water and / or one or more users (U2, Ui) of heating water, these users (U1, U2, Ui) being associated with a respective outlet (a, b, c) of the valve   (104), as well as a return circuit (130) directly connecting   one of the outputs (c) of the valve (104) to the return column, characterized in that it comprises: - a main control (2) controlling the central source of   heater (1) to control the temperature of the coolant   carrier according to a program defined according to authorities   user operating stations (Ul, U2, Ui),   - an auxiliary control (122) associated with each individual circuit   manual to control the supply of heat transfer fluid to users (Ui) according to setpoint signals (TECSM,   TECSm, TCHM, TCHm) as well as signals provided by the cap-   ters (113, 121) giving the state of the users (Ul, U2, Ui),   this auxiliary control (122) itself receiving its instructions   in the form of the temperature signal (Sl) of the heat transfer fluid detected at the input (102) of the individual circuit by a temperature sensor (103) .5 2) Heating installation according to claim 1, characterized in that that at least some of the users (Ui) must only operate if the temperature of the heat transfer fluid (Si) is greater than 10 or less than a value or between two values, these limit signals being recorded in the auxiliary control (122).   3) Installation according to claim 1, characterized in that   each user (Ul, U2) is equipped with a temperature sensor   input (107, 116) and an outlet temperature sensor   tie (111, 119) as well as a flow meter (110, 118) supplying their signals (S2, S5, S3, S6, S8, S9) to the auxiliary control   (122) to manage the energy consumption of each user   tor. 4) Installation according to claim 1, characterized in that the main control receives its temperature programs   in the form of daily programs.