Method for configuring an air treatment plant

Abstract

Using a web configuration server, an air handling unit type is selected from a predetermined list of air handling unit types, air handling unit components are selected from a predetermined list of components, a control function is selected from a predetermined list of control functions, and the control functions are configured. The air handling unit (1) includes a universal electrical cabinet (10) suitable for any type of air handling unit (1), and configured to operate only with the selected components. The universal electrical cabinet houses a programmable logic controller (PLC) (6) in which the web configuration server is embedded and configured with the selected control functions.

Description

FIELD OF INVENTION

[0001] The present invention relates to methods for configuring and reconfiguring air handling units, and to assemblies of air handling units. TECHNOLOGICAL BACKGROUND

[0002] In the service sector, it is common practice to equip buildings with air handling units. In particular, in healthcare environments, especially hospitals, the safety of patients and medical staff is paramount. Indoor air quality is a key factor affecting this safety and must therefore be carefully monitored.

[0003] As a general rule, each air handling unit is custom-designed for the building whose air needs to be treated, by combining components to implement the desired air treatment functions. During the design of the air handling unit, the controller is configured to operate with its various components.

[0004] This approach, however, generates significant development needs, as each air handling unit is unique, tailored to the specific characteristics of the building it serves. This approach also generates significant maintenance requirements. Indeed, if a component fails or becomes obsolete, it is necessary to re-examine the overall system configuration to ensure that it is correctly updated or replaced, which can sometimes even necessitate replacing the entire electronic board.

[0005] In the related field of split air conditioning systems, US 10,215,436 proposes a controller comprising a microprocessor managing a portion for fixed tasks and a modular or expandable portion, each capable of being coupled to peripheral devices. More specifically, the expandable portion is coupled to devices via control modules acting as slaves to the microprocessor. US 10,215,436 thus proposes two distinct configurations: one using only the portion for fixed tasks, and the other using both the fixed and expandable portions.

[0006] The invention aims to simplify the deployment and use of air handling units, which can be very different from one another. SUMMARY OF THE INVENTION

[0007] Thus, the invention relates to a method for configuring an air handling unit comprising: Using a web configuration server, one selects a type of air handling unit from a predetermined list of air handling unit types; using the web configuration server, one selects at least some elements of the air handling unit from a predetermined list of elements; using the web configuration server, one selects at least one control function from a predetermined list of control functions; using the web configuration server, one configures said control functions. in which the air handling unit includes said elements and a universal electrical cabinet suitable for any type of air handling unit, and set up to operate only with said selected elements, the universal electrical cabinet housing an automaton in which the configuration web server is embedded, and configured with said selected control functions.

[0008] Thanks to these provisions, the equipment used can be standardized, and its configuration can be done universally via software.

[0009] Depending on various aspects, it is possible to predict one and / or the other of the characteristics below taken alone or in combination.

[0010] According to one embodiment, using the configuration web server, the type of air handling unit is selected from a predetermined list of air handling unit types comprising at least two types of air handling units from: {single flow; double flow; double flow with heat exchange by coil; double flow with heat exchange by plate exchanger; double flow for operating room}.

[0011] According to one embodiment, using the configuration web server, at least some elements of the air handling unit are selected from a predetermined list of elements including at least one sensor and at least one actuator or alarm.

[0012] According to one implementation, using the web configuration server, at least some elements of the air handling unit are selected from a predetermined list of elements comprising at least one of the pairs from the following list: a temperature probe as a sensor and a thermal system as an actuator; a pressure probe as a sensor and a fan as an actuator; a humidity probe as a sensor and a humidification and / or dehumidification system as an actuator.

[0013] According to one implementation, using the web configuration server, at least one alert / alarm is configured from a predetermined list of alerts / alarms depending on the type of air handling unit.

[0014] In another aspect, the invention relates to a method for reconfiguring an air handling unit in which: Having an air handling unit configured according to the above configuration process, at least one element is added to the air handling unit, using the configuration web server, at least one added element of the air handling unit is selected from a predetermined list of elements depending on the type of air handling unit, using the configuration web server, at least one new control function is selected from a predetermined list of control functions depending on the type and the added element of the air handling unit, using the configuration web server, said new control function is configured, in which the air handling unit includes said added element, said universal electrical cabinet being put in place to also operate with said added element, the controller being further configured with said new control function.

[0015] According to another aspect, the invention relates to a method for configuring air handling units comprising implementing the above air handling unit configuration method for a plurality of air handling units of different types, wherein the universal electrical cabinets of each air handling unit are set up to operate only with said selected elements of each respective unit and each house a respective controller configured with said control functions selected for said respective air handling unit.

[0016] In another aspect, the invention relates to a set of air handling units, each comprising: at least some elements selected from a predetermined list of elements depending on a type of air handling unit chosen from a predetermined list of types of air handling units, a universal electrical cabinet suitable for any type of air handling unit, and set up to operate only with said selected elements, the universal electrical cabinet housing a controller with an integrated web configuration server and configured with at least one control function selected from a predetermined list of control functions depending on the type and elements of the air handling unit, universal electrical cabinets for air handling units featuring the same input / output interfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Embodiments of the invention will be described below with reference to the drawings, briefly described below: there figure 1 This schematically represents an air handling unit of a first type. figure 2 schematically represents a regulatory loop. figure 3 This schematically represents a graph with a measurement on the x-axis and the calculated setpoint on the y-axis; the curve thus shows the calculated setpoint as a function of the measured data, according to an example implementation. figure 4 schematically represents an electrical cabinet according to one embodiment of the invention. figure 5 schematically represents an air handling unit of a second type. figure 6 schematically represents an air handling unit of a third type. figure 7 schematically represents an air handling unit of a fourth type. figure 8 schematically represents an air handling unit of a fifth type. figure 9schematically represents an air handling unit of a sixth type.

[0018] In the drawings, identical references designate identical or similar objects. DETAILED DESCRIPTION

[0019] There figure 1This schematic diagram represents an air handling unit 1 equipping a building. The air handling unit 1 is commonly referred to as an air handling unit 1. An "air handling unit" is a technical air treatment system designed to modify the characteristics (temperature, purity, and / or humidity) of an incoming airflow into a building according to a control signal. An air handling unit is inherently modular and can include a wide variety of components, both in number and type, depending on the specific requirements of the building it serves. The building served is, for example, a service building, such as one where the ambient air must be of good quality, typically a healthcare facility like a hospital or clinic. In this description, the terms "exterior" and "interior" refer to this type of building.

[0020] The air handling unit 1 includes at least one duct 2 providing an airflow connection to at least one air inlet 3 and at least one air outlet 4. Air is intended to flow from at least one air inlet 3 towards at least one air outlet 4, this flow being either natural or assisted. In this description, the terms "upstream" and "downstream" refer to this flow direction. At least one air inlet 3 of the air handling unit 1 may be connected to one or more upstream air inlets, which may be suitable for supplying outside air, also known as "fresh" air. At least one air outlet 4 of the air handling unit 1 can be connected aeraulically to one or more downstream air outlets, in particular located in a place of human occupancy of the building, such as a room or a passageway (corridor, stairwell or elevator shaft, etc...).

[0021] The air handling unit 1 also includes several components. Among these components, the air handling unit includes at least one actuator 5 that affects the airflow. Different types of actuators 5 will be described later. The numeral "5" is used here to generically designate an actuator, and the numeral "5" followed by one or more other symbols is used to designate a specific actuator. The actuator 5 can receive one of a plurality of commands. For example, the actuator 5 can be controlled by an on / off function. Alternatively, the actuator 5 can be controlled to operate according to one of a plurality of discrete operating modes. Alternatively, the actuator 5 can be controlled to operate according to an operating mode that varies discontinuously or continuously with respect to a control parameter.

[0022] The air handling unit 1 also includes a controller 6 adapted to control the actuator 5. As will be shown in more detail later, in the case of multiple actuators 5, the controller 6 is common to all the actuators 5.

[0023] Depending on the embodiment, the air handling unit 1 may also include one or more sensors 7. The numeral '7' is used here to generically designate a sensor, and the numeral '7' followed by one or more other symbols is used to designate a specific sensor. A sensor 7 may be associated with an actuator 5.

[0024] The sensors 7 are wired to the PLC 6, so that the measurements taken by the sensors 7 reach the PLC 6. The actuators 5 are wired to the PLC 6, so that the commands determined by the PLC 6 reach the actuators 5. Alternatively, all or part of these wirings can be replaced by wave communication systems.

[0025] Air handling unit 1 includes a communication system designed to exchange information with a supervisory control system, a building management system, and / or a centralized technical management system. Communication can be implemented via wired and / or wireless connections. For modularity, an open communication protocol, such as BACnet, can be selected, as defined in the priority date. Therefore, air handling unit 1 is compatible with any commercially available equipment using this communication protocol.

[0026] Considering a functional system comprising a sensor 7, a controller 6, and an actuator 5, the controller 6 is suitable for operating with the actuator 5 and the sensor 7. More precisely, the controller 6 is suitable for controlling the actuator 5 based on data provided by the sensor 7 and a predetermined rule. The predetermined rule may be configurable.

[0027] According to one embodiment, for this functional system, the automaton 6 is adapted to control the actuator 5 according to a predetermined rule chosen from a plurality of predetermined rules, and stored in a memory 15 accessible to the automaton.

[0028] The available predetermined rules are, for example, a Boolean control based on a predetermined threshold, a proportional control, a proportional-integral control, a derivative-proportional-integral control, or another.

[0029] According to a first example of a functional system, the air handling unit 1 includes, as an actuator 5, a fan 5a adapted to generate an airflow from at least one air inlet 3 to at least one air outlet 4. The fan 5a is, for example, positioned between at least one air inlet 3 and at least one air outlet 4. The fan 5a is configurable. For example, a control parameter of the fan 5a is the rotational speed of its electric motor. This control parameter can take a continuous value between a minimum (typically 0) and a maximum. The controller 6 is adapted to determine this control parameter and to control the fan 5a accordingly. For example, the control parameter is an electrical voltage between a minimum and a maximum, and the controller 6 is adapted to transmit this electrical voltage to a variable speed drive for the fan 5a.This functional system includes, as a sensor 7, a pressure probe 7a. The pressure probe 7a is located downstream, near at least one air outlet 4. The controller 6 implements fan 5a control based on the pressure measurements provided by the pressure probe 7a. The controller 6, for example, implements a control loop parameterized by a pressure setpoint. The pressure setpoint is, for example, predetermined. In one embodiment, the controller 6 implements proportional-integral control, as shown in Figure 1. figure 2 .

[0030] Depending on the variants, pressure regulation based on the difference between the pressure measured by the pressure probe 7a and atmospheric pressure can be implemented, or flow regulation based on the difference between the pressures measured upstream and downstream of the ventilation motor.

[0031] According to a second example of a functional system, the air handling unit 1 includes, as an actuator 5, a thermal system 5b adapted to modify the temperature of the airflow between at least one air inlet 3 and at least one air outlet 4. The thermal system 5b is, for example, located between at least one air inlet 3 and at least one air outlet 4. If the air handling unit 1 also includes a fan 5a, the thermal system 5b is, for example, located upstream of the fan 5a. The thermal system 5b is configurable. Depending on the embodiment, the thermal system 5b may include a heating thermal system 5b1 and / or a cooling thermal system 5b2. In the following example, reference is made to the heating thermal system 5b1, also called the "hot valve," the description being applicable to the cooling thermal system 5b2, also called the "cold valve."For example, a control parameter of the thermal system 5b is its power. The control parameter in question can take a continuous value between a minimum (typically 0) and a maximum. This functional system includes, as a sensor 7, a temperature probe 7b. The temperature probe 7b is located downstream, close to at least one air outlet 4 (see for example . Fig. 5 The controller 6 implements regulation of the thermal system 5b based on temperature measurements transmitted by the temperature probe 7b. For example, the controller 6 implements a control loop parameterized by a temperature setpoint. This temperature setpoint may be predetermined. In one example, the controller 6 implements proportional-integral control.

[0032] Alternatively, the 7b temperature probe measures the ambient temperature. Ambient temperature is the temperature inside the building, for example in a reference room.

[0033] When the functional system includes both a heating thermal system 5b1 and a cooling thermal system 5b2, the setpoint temperature values ​​are preferably separated by a difference greater than a predetermined threshold, for example 1°C. The air handling unit may include a valve, known as a "6-way valve", allowing connection between both the heating thermal system 5b1 and the cooling thermal system 5b2.

[0034] Alternatively, other control parameters of the thermal system 5b can be used, such as the outside temperature. Such a functional system then uses an outside temperature sensor 7be located outside the building. Thus, in one embodiment, the controller 6 is adapted to regularly determine the setpoint temperature value from the outside temperature data. figure 3 schematically represents such a function. As shown on the figure 3Below a minimum outdoor temperature X1, the setpoint temperature remains constant. Above a maximum outdoor temperature X4, the setpoint temperature remains constant. Between setpoint temperatures X2 and X3 (between X1 and X4), the setpoint temperature varies linearly with the outdoor temperature, with a positive slope. For example, it may be equal to the outdoor temperature. In this case, the control system is deactivated. Operation between X1 and X2 is a linear variation between operation at X1 and operation at X2. Operation between X3 and X4 is a linear variation between operation at X3 and operation at X4. The values ​​X2, X3, and even X1 and X4 are configurable. The difference between two consecutive values ​​can be constrained to be greater than a predetermined threshold. Other implementations are possible.

[0035] Alternatively or in addition, other control parameters of the thermal system 5b can be used, such as a desired downstream temperature value. The controller 6 then communicates with a component (not shown) downstream of the air handling unit 1, which provides it with a desired downstream temperature value. Thus, in one embodiment, the controller 6 is adapted to regularly determine the setpoint temperature value based also on the desired downstream temperature value.

[0036] As an alternative or in addition, the automaton 6 can also take into account an input data from a temperature potentiometer used to shift the temperature demand relative to the programmed regulation.

[0037] As an alternative or complement, the thermal system 5b can be more or less complex. For example, it may include a pre-treatment thermal system adapted to cool or heat the air upstream of the devices described above. Such a pre-treatment thermal system may also include a pre-heating or cooling thermal system controlled by a preheating temperature probe located at any suitable point.

[0038] As an alternative to this embodiment, the controller 6 communicates with several terminal elements (not shown) downstream of the air handling unit 1, for example in separate locations, each of which provides it with a desired downstream temperature value, possibly different from one another. Thus, according to one embodiment, the controller 6 is adapted to regularly determine the setpoint temperature value based also on these desired downstream temperature values ​​at the terminals.

[0039] According to a third example of a functional system, the air handling unit 1 includes, as an actuator 5, a humidity control system 5c adapted to modify the humidity of the airflow between at least one air inlet 3 and at least one air outlet 4 (cf. figure 5The humidity control system 5c is, for example, located between at least one air inlet 3 and at least one air outlet 4. If the air handling unit 1 also includes a heating system 5b, the humidity control system 5c is, for example, located downstream of the heating system 5b. The humidity control system 5c is configurable. Depending on the embodiment, the humidity control system 5c may include a dehumidification system 5c1 and / or a humidification system 5c2. In the following example, reference is made to the humidification system 5c2. For example, a control parameter of the humidification system 5c2 is its power. This control parameter may, for example, be a control voltage that can take a continuous value between a minimum (typically 0) and a maximum (typically 10 volts). This functional system includes, as sensor 7, a humidity probe 7c.The humidity sensor 7c is located downstream, near at least one air outlet 4. The controller 6 implements a control system for the humidity control 5c based on the humidity measurements provided by the humidity sensor 7c. The controller 6, for example, implements a control loop parameterized by a humidity setpoint. This setpoint is, for example, predetermined. In one embodiment, the controller 6 implements proportional-integral control.

[0040] The description given above for temperature regulation can be transposed to humidity, for example regarding taking into account ambient humidity, outside humidity, or a request for humidity value from downstream element(s).

[0041] The dehumidification system 5c1 can cooperate with the heating system 5b. Specifically, the cooling system 5b2 can be used for dehumidification. Indeed, by cooling the air, the water vapor condenses and is removed by the cooling system 5b2. The resulting cool, dry air can then be reheated by the heating system 5b1, which is downstream of the cooling system 5b2.

[0042] According to a fourth example, the air handling unit 1 may include a damper 16 that can be opened or closed to selectively allow or prevent airflow within the air handling unit 1. The air handling unit 1 includes an actuator 5 for placing the damper 16 in the open or closed position, or even in an intermediate position between the open and closed positions, in which the airflow passage area is intermediate between the open and closed positions. A damper 16 may include a limit switch adapted to detect its opening and / or closing, and to communicate this information to the controller 6.

[0043] Regardless of the actuator 5 considered, a command can also be a fault command, in the event that the automaton 6 determines the existence of a fault, and then sends a command to the actuator 5 controlling it in fault mode, that is to say, depending on the case, ordering the actuator 5 not to operate, or to operate in fault mode.

[0044] The PLC 6 can also detect the presence of an alert and send an alert signal command, for example, via a warning device. The warning device can be audible, visual, and / or communicate a notification. For example, an indicator light, called a "summary indicator light," is implemented, which is activated regardless of the alert, or regardless of which alert is selected from a predetermined group of alerts, for example, in the event of the unintended closure of at least one register. The alert may or may not be combined with a fault.

[0045] For example, the air handling unit 1 includes an antifreeze sensor 7d that transmits a signal to the controller 6. This is, for example, a differential pressure switch at the plate heat exchanger. The controller 6 processes the signal according to a predetermined rule. If the predetermined rule detects a fault, the controller 6 can command one or more of the following actions: maximum activation of the heating system 5b1, closure of the air dampers, shutdown of the fans, and deactivation of the control loops. These actions are, for example, determined for a predetermined time, or until the controller 6, processing the signal from the antifreeze sensor 7d, determines that there is no fault.

[0046] In another example, the air handling unit 1 includes a filtration system 17 adapted to filter the air flowing into the air handling unit, and in particular towards the outlet 4. The filtration system is adapted to retain particles present in the incoming air 3 in order to prevent them from reaching the outlet 4. A sensor 7 is used to measure the saturation level of the filtration system 17. The sensor 7 includes, for example, a pressure switch 7e measuring the pressure difference between the upstream and downstream sides of the filtration system 17. The controller 6 processes the signal received from the pressure switch 7e, according to a predetermined rule, for example by comparison with a predetermined threshold, and issues an alert if necessary to replace the filtration system 17. The air handling unit 1 may include one or more filtration systems 17, each comprising one or more filters or pre-filters.

[0047] The air handling unit 1 may therefore include other sensors 7 that may generate faults or alerts, such as a hygrostat, a smoke sensor, a fire sensor, a voltage sensor for the electrical cabinet supply, sensors for the proper functioning of the elements of the air handling unit, or alerts from detection from one or more sensors (rapid increase or exceeding of a temperature or flow threshold, for example).

[0048] In addition, the air handling unit 1 may include a screen, also called a "display" showing, for example in real time, one or more measured parameters, such as, for example, a measured pressure.

[0049] There are other types of sensors, other measured quantities, other actuators, other warning devices and other control rules for air handling units than those just described.

[0050] According to one alternative embodiment, as shown on the figure 1 The air handling unit 1 may include a mixing system 8 adapted to mix outside air and inside air. In this case, sensors 7 can provide the controller 6 with data relating to the outside air, the inside air, and / or the mixing level.

[0051] There figure 4 schematically represents an electrical cabinet 10 for the air handling unit 1 of the figure 1The electrical cabinet 10 is connected to the power supply via a power supply line 11. The electrical cabinet 10 also includes an input / output interface comprising, for example, a terminal block 12 suitable for electrical connection to the elements of the air handling unit 1. The terminal block 12 includes a plurality of input lines 12e and a plurality of output lines 12s. The input lines 12e are each connected to a sensor 7 of the respective air handling unit 1, so that the information transmitted by the sensor 7 reaches the electrical cabinet 10. The output lines 12s are each connected to an actuator 5 or a warning device of the respective air handling unit 1, so that a command issued by the electrical cabinet 10 reaches the actuator 5 or the warning device.

[0052] Thus, in the example of the air handling unit 1 of the figure 1The inlet port 12ea is connected to the pressure sensor 7a, the inlet port 12eb is connected to the temperature sensor 7b, the inlet port 12ebe is connected to the outdoor temperature sensor, the inlet port 12ec is connected to the humidity sensor 7c, and the other inlet ports are not connected. The outlet port 12sa is connected to the fan 5a, the outlet port 12sb1 is connected to the heating system 5b1, the outlet port 12sb2 is connected to the cooling system 5b2, the outlet port 12sc1 is connected to the dehumidification system 5c1, the outlet port 12sc2 is connected to the humidification system 5c2, and the other outlet ports are not connected.

[0053] Connections can be made in any suitable manner. Alternatively or in addition, some routes could be connected wirelessly while maintaining the same basic architecture.

[0054] The electrical cabinet 10 houses the PLC 6, which is adapted to determine the commands to the actuators 5 and / or alarms based on data from the sensors 7 and predetermined rules, as shown above. The PLC's input and output channels are predetermined but may be occupied or free, depending on the control unit type.

[0055] The PLC 6 incorporates an embedded web configuration server used to configure the PLC 6. The web server is accessible via a network from a navigation software, and allows the authorized user to configure the air handling unit 1.

[0056] The air handling unit 1 according to the embodiment of the figure 1 can be controlled in several alternative ways, without any maintenance intervention on the air handling unit 1. It is enough to modify the configuration of the PLC 6 to apply the desired rule.

[0057] Thus, for example, we can have several identical air handling units 1, that is to say comprising the same elements, assigned to several buildings, but operating differently from each other by the simple configuration of the automaton 6.

[0058] Alternatively or in addition, the same air handling unit 1 can easily be operated in several different ways by simply modifying the configuration of the controller 6. This modification can be made by an operator as needed. Depending on the embodiment, an air handling unit can be configured to operate in different ways according to a predefined schedule. For example, during a first time period, the controller 6 implements one set of rules, and during a second time period, the controller 6 implements a second set of rules. The time periods are, for example, linked to the circadian rhythm (alternating day / night), the weekly rhythm (alternating weekdays and weekends), the seasonal rhythm (alternating cold and hot, dry and humid seasons), and / or other rhythms.

[0059] THE Figures 5The following schematically represent other air handling units. These air handling units may include all or part of the elements and functions described above, which are not shown again for the sake of simplicity.

[0060] There figure 5 schematically represents an air handling unit 1' of a different type. The air handling unit 1' shown on the figure 5 is a dual-flow air handling unit.

[0061] The treatment of incoming air by the air handling unit 1' can be similar to the description above, which will not be repeated here. This air is referred to as "incoming". This path can also be referred to as "supply".

[0062] The air handling unit 1' comprises at least one duct 2' providing an airflow connection to at least one air inlet 3' and at least one air outlet 4'. Air is intended to flow from at least one air inlet 3' towards at least one air outlet 4', this flow being either natural or assisted. In the description, the terms "upstream" and "downstream" refer to this flow direction. At least one air inlet 3' of the air handling unit 1' may be connected to one or more upstream air inlets, particularly suitable for indoor air intake, especially those located in a human occupancy area of ​​the building, such as a room or passageway (corridor, stairwell, elevator shaft, etc.). At least one 4' air outlet of the air handling unit 1 can be connected aeraulically to one or more downstream air outlets, including outside.This route can be described as "outbound" or "rebound".

[0063] The outgoing portion of the air handling unit 1' also includes at least one actuator 5 having an effect on the airflow, as described previously for the incoming portion, or a warning device.

[0064] According to the embodiments, the outgoing portion of the air handling unit 1 may also include one or more sensors 7, as described previously for the incoming portion.

[0065] For example, the outlet portion of the air handling unit 1' includes, as an actuator 5, a fan 5a' adapted to generate an airflow from at least one air inlet 3' to at least one air outlet 4'. The fan 5a' is, for example, located between at least one air inlet 3' and at least one air outlet 4'. The fan 5a' is configurable. For example, a control parameter for the fan 5a' is the rotational speed of its electric motor. This control parameter can take a continuous value between a minimum (typically 0) and a maximum. This functional system includes, as a sensor 7, a pressure probe 7a'. The pressure probe 7a' is located downstream, near at least one air outlet 4'. The automaton 6 implements a regulation of the fan 5a' according to the pressure measurements communicated by the pressure probe 7a'.For example, PLC 6 implements a control loop parameterized by a pressure setpoint. The pressure setpoint is, for example, predetermined. According to one embodiment, PLC 6 implements proportional-integral control, as shown in Figure 1. figure 2 . There figure 2 This schematically represents the measurement from sensor 7, the setpoint stored in memory 15, and both inputs to the PLC 6, which determines a control value based on a predetermined rule, also stored in memory 15, and represented by a curve 18 linking the control value to the measurement as a function of the setpoint. The control value is then sent to the actuator 5.

[0066] Thus, in the example of the air handling unit 1 of the figure 5In addition to the connections described above, the input channel 12ea' is connected to the pressure probe 7a' and the output channel 12sa' is connected to the fan 5a', and the other input and output channels are not connected.

[0067] In the preceding description, the incoming and outgoing paths are independent but controlled by the same electrical cabinet.

[0068] For this type of control unit, it is possible, alternatively, to control the incoming and outgoing channels in an interdependent manner.

[0069] For example, the PLC 6 is configured to control at least one actuator 5 or a warning device on the incoming channel based also on at least one data point from a sensor 7 on the outgoing channel. Alternatively or in addition, the PLC 6 is configured to control at least one actuator 5 or a warning device on the outgoing channel based also on data point from at least one sensor 7 on the incoming channel.

[0070] It follows from the above that the air handling unit 1, according to the embodiment of the figure 5 can be controlled according to several alternative configurations, without any maintenance intervention on the air handling unit.

[0071] Thus, for example, one can have several identical air handling units 1', as shown on the figure 5assigned to several buildings, but operating differently from each other by the simple configuration of automaton 6.

[0072] Alternatively or in addition, the same air handling unit 1' as shown on the figure 5 , can easily be implemented according to several alternative configurations, by simply modifying the configuration of the automaton 6.

[0073] Furthermore, the air handling unit 1 as shown on the figure 1 and the air handling unit 1' as shown on the figure 5can be operated using the same electrical cabinet 10. The electrical cabinet 10 is connected to the air handling units 1, 1' according to the sensors, actuators, and alarms specific to each. Each PLC 6 is configured to allow the use of the control rules specific to each air handling unit 1, 1'. Thus, for the air handling unit 1 of the figure 1 The available actuator control rules are rules that do not take into account data measured by outgoing channel sensors, since such data is not accessible for such an air handling unit.

[0074] There figure 6 schematically represents a 1" air handling unit of another type.

[0075] The 1" air handling unit in question is also a dual-flow unit. Compared to the 1" air handling unit of the figure 5It employs a heat exchanger 13 between the incoming and outgoing flows. Such a heat exchange allows, in particular, the incoming air from outside to be heated with the outgoing air from inside, when the indoor air is warmer than the outside air, thus reducing the energy that the heating system 5b1 must consume.

[0076] The automaton 6 is configured to implement thermal regulation functions of the incoming air specific to this type of air handling unit 1". For example, the control of the thermal heating system 5b1 of the incoming path can take into account as input data a data from a sensor 7 of the outgoing path, for example a temperature data of the outgoing flow and / or a flow rate data of the outgoing flow.

[0077] Furthermore, the 1" air handling unit of the figure 6It includes an actuator 5d at the heat exchanger, which is connected to a dedicated output channel 12sd of the electrical cabinet 10. The controller 6 applies a predetermined rule to determine a command for the heat exchanger actuator 5d based on input data, such as, for example, the temperatures measured in the inlet and outlet channels, or even the outside temperature and / or the flow rates of the inlet and / or outlet channels. The command is, for example, a command to activate a circulation pump for a heat transfer fluid in the heat exchanger, also called a "recovery pump," parameterized by a pumping power. Such a heat exchanger is also called a "recovery coil" heat exchanger.

[0078] Various heat exchange technologies are possible, such as a plate heat exchanger as shown in the image. figure 7The control rules that can be implemented by the PLC 6 depend on the type of power plant.

[0079] There figure 8 schematically represents an air handling unit 1‴ according to another type, called “operating block”.

[0080] The 1" air handling unit in question is also a dual-flow unit. Compared to the 1" air handling unit of the figure 5 It implements the recirculation of at least part of the outgoing airflow into the incoming airflow. Such recirculation limits the incoming airflow rate from outside and can also provide a thermal contribution, as described above, thus reducing the energy that the 5b1 heating system must consume.

[0081] The automaton 6 is configured to implement thermal regulation functions of the incoming air specific to this type of air handling unit 1‴. For example, the control of the thermal heating system 5b1 of the incoming path can take into account as input data a data from a sensor 7 of the outgoing path, for example a temperature data of the outgoing flow and / or a flow rate data of the outgoing flow.

[0082] Furthermore, the air handling unit 1‴ of the figure 8It includes an actuator 5, such as a return valve 5e, which is connected to a dedicated output channel 12se of the electrical cabinet 10. The controller 6 applies a predetermined rule to determine a command for the return valve 5e based on input data, such as, for example, the temperatures measured in the inlet and outlet channels, or even the outside temperature and / or the flow rates of the inlet and / or outlet channels. The command is, for example, a command to open the return valve 5e, parameterized by an opening size of the return valve 5e. Alternatively, a flow rate could be controlled through the return valve 5e.

[0083] As seen on the figure 8In this type of unit, the return duct 14 extends from the outlet, upstream of the fan 5a', to the inlet, downstream of the filtration system and upstream of the fan 5a. However, other configurations are possible, as with the air handling unit 1"" shown in the figure 9 where the return duct 14 opens upstream of the incoming air handling units. The control rules that can be implemented by the PLC 6 depend on the type of plant.

[0084] Regardless of the type of air handling unit, the controller 6 can be configured to implement a chosen operating mode for the air handling unit. For example, one operating mode is "Off," in which no functional systems are regulated. Another operating mode is "Occupancy," also called "Comfort," which corresponds to the nominal operating mode of the air handling unit, in which each functional system is regulated. A third operating mode is "Unoccupied," in which a set of setpoint values ​​for the air handling unit is modified compared to the "Occupancy" mode, particularly to reduce energy consumption. Finally, a third operating mode is "Disinfection," in which the air handling unit is regulated to disinfect a room such as an operating theater.This disinfection process uses a room disinfection machine, and the air handling unit is then configured to treat the air in a way that is compatible with the disinfection process.

[0085] Thus, the electrical cabinet 10 is likely to receive as input one and / or the other of the measured quantities coming from the following sensors: Temperature probes: Downstream of heat exchanger, Preheating, Ambient, Return, Supply, Fresh air; Pressure probes: Ambient, Return, Supply; Humidity probes: Ambient, Return, Supply.

[0086] More specifically, the electrical cabinet 10 is likely to receive as input one or both of the measured quantities from the following sensors: Downstream temperature probe for heat exchanger, Preheating temperature probe, Ambient temperature probe, Return temperature probe, Supply air temperature probe, Fresh air temperature probe, Ambient pressure probe, Return pressure probe, Supply air pressure probe, Low water pressure switch for heat exchanger, Antifreeze pressure switch for plate heat exchanger, Temperature potentiometer, Ambient humidity probe, Return humidity probe, Supply air humidity probe, Return air filter pressure switch, Operating room return air filter pressure switch, Supply air filter pressure switch, Supply air pre-filter pressure switch, Operating room supply air filter pressure switch, Fresh air filter pressure switch.

[0087] If necessary, the electrical cabinet 10 does not include enough channels to connect all the sensors, actuators and alarms, and the operator defines, via a human-machine interface allowing access to the configuration web server, the quantity associated with some of the channels.

[0088] PLC 6 provides access to the following functionalities: Choice of options (for air handling units including less common elements allowing the implementation of certain specific functionalities), for example: Humidifier - for air handling units 1 including an air humidifier that can be operated by an occupant, for example from an operating room, Preheating - for air handling units 1 including a preheating system, Pressure display - for air handling units 1 including a room equipped with a display of the pressure prevailing in another area, in particular in an operating room, Occupancy register - for air handling units 1 including a register that can be controlled according to a building occupancy parameter.Operating mode selection: Off, Reduced - operation in a reduced energy consumption mode - in this mode, for example, the registers are only partially open, Comfort, Restart - transitional operation between the "reduced" operating mode and the "comfort" mode, which can be activated by an occupant, for example by pressing a restart push button, Disinfection.

[0089] The PLC 6 is capable of implementing at least one or more of the following functionalities: Temperature control: Supply air temperature control of hot and cold valves according to terminal demand with priority, Return air temperature control of hot and cold valves with potentiometer, Return air temperature control of hot and cold valves with fixed setpoint, Return air temperature control of hot valve with fixed setpoint, Return air temperature control of cold valve with fixed setpoint, Ambient temperature control of hot and cold valves with fixed setpoint, Ambient temperature control of hot valve with fixed setpoint, Ambient temperature control of cold valve with fixed setpoint, Supply air temperature control of hot and cold valves according to return air temperature with potentiometer, Supply air temperature control of hot and cold valves with potentiometer, Supply air temperature control of hot and cold valves according to ambient temperature, Supply air temperature control of hot and cold valves according to return air temperatureSupply air temperature control (hot and cold air valves) based on outside temperature; Supply air temperature control (hot and cold air valves) with fixed setpoint; Supply air temperature control (hot air valve) with fixed setpoint; Supply air temperature control (cold air valve) with fixed setpoint; Pressure control: Return, Supply; Flow control: Return, Supply; Heat recovery control: Heat exchanger heat recovery control with pump based on temperature difference; Heat exchanger heat recovery control with plate heat exchanger based on temperature difference with regulator and antifreeze pressure switch; Heat exchanger heat recovery control with pump based on temperature threshold; Absolute humidity control: Dehumidification and humidification control (return air) with fixed setpoint; Humidification control (return air) with fixed setpoint; Dehumidification control (return air) with fixed setpoint.Dehumidification and humidification control with fixed setpoint, Ambient humidification control with fixed setpoint, Dehumidification and humidity control, Supply air dehumidification and humidification control based on return air humidity, Supply air dehumidification and humidity control based on return air humidity, Supply air dehumidification and humidification control with fixed setpoint, Supply air humidification control with fixed setpoint, Supply air dehumidification control with fixed setpoint; Relative humidity control: Dehumidification and humidification control with fixed setpoint, Return air humidification control with fixed setpoint, Return air dehumidification control with fixed setpoint, Ambient dehumidification and humidification control with fixed setpoint, Ambient humidification control with fixed setpointDehumidification and humidity control for ambient air; Dehumidification and humidification control for supply air based on return air humidity; Dehumidification and humidification control for supply air with a fixed setpoint; Humidification control for supply air with a fixed setpoint; Dehumidification control for supply air with a fixed setpoint.

[0090] PLC 6 also allows for the warning of the following faults: Anti-freeze thermostat, Smoke detector, Voltage presence, Fire detection, Ventilation stop, Filters: Return, Operating room return, Fresh air, Fresh air pre-filter, Supply pre-filter, Operating room supply, Supply.

[0091] Thus, the electrical cabinet 10 is capable of outputting a control signal to one or both of the following actuators: Registers: Exhaust, Return, Supply, Fresh Air, Bypass (register allowing bypass of an element of the air handling unit), Disinfection, Occupancy; Actuators: Cold Valve, Hot Valve, 6-Way Valve, Preheat Valve, Supply Fan, Return Fan, Humidifier, Recovery Pump, Occupancy Register.

[0092] More specifically, the electrical cabinet 10 is capable of outputting a control signal to one or both of the following actuators or alarms: Humidifier (Y / N?), Hot valve, Cold valve, Preheating valve, 6-way valve, Registers (Y / N?), Fault summary indicator, Pressure display, Bypass register, Occupancy register, Recovery pump (Y / N?), Occupancy register (Y / N?), Humidifier, Return air speed controller, Supply air speed controller, Restart push button, Recovery pump fault, Humidifier fault, Humidifier fault, Return air speed controller fault, Supply air speed controller fault, Register limit switch summary, Anti-freeze thermostat fault, Smoke detector fault, Voltage presence fault, Fire detection fault, Ventilation stop fault. Air handling unit configuration

[0093] The system just described can be configured as follows. Configuration is performed by the embedded web configuration server. This server is accessible to an operator via a web browser, possibly after authentication.

[0094] The first step is to configure an air handling unit. To begin, we describe the case of a new air handling unit intended to equip a building.

[0095] The operator first selects the type of air handling unit intended for their building from among the types of air handling units available on the web configuration server. This type is, for example, a single-flow air handling unit, a dual-flow air handling unit, a heat exchanger with a coil or plate heat exchanger, a dual-flow operating room air handling unit as described above, or other available types.

[0096] The choice of control unit type will restrict the list of elements, sensors, actuators, warning devices, control rules and alerts / faults available during configuration.

[0097] In a second step, the operator defines the elements of his air handling unit, from the restricted list of elements compatible with the type of unit selected.

[0098] The components include, for example, actuators, sensors, and warning devices.

[0099] The operator associates, where applicable, the channels of the electrical cabinet 10 with the actuators and sensors connected to those channels. In some cases, this association is automatic, as certain channels are dedicated to a single type of sensor or actuator. In other cases, this association is made via a multiple-choice list associated with each channel, thus listing only the sensors and actuators that can be associated with that channel. This prevents oversizing the electrical cabinet 10.

[0100] The operator defines the types of pressure or flow regulation of his air handling unit, from a list of predefined types, such as for example pressure regulation between 0 and 1000 Pa, pressure regulation between 0 and 1600 Pa, or pressure regulation between 0 and 2500 Pa, or flow regulation between 0 and 1000 Pa, flow regulation between 0 and 1600 Pa, or flow regulation between 0 and 2500 Pa.

[0101] This choice is made, for example, for the supply air path and the return air path.

[0102] Then, the operator chooses their temperature control rule from the available rules. For example, from the 16 available rules, they choose the hot and cold air supply temperature control with potentiometer.

[0103] Then, the operator chooses their humidity control rule from the available rules in absolute or relative humidity.

[0104] Then, the operator chooses their recovery rule from the available rules.

[0105] Then the operator configures their alerts and sets up their sensors or actuators. Commissioning of the air handling unit

[0106] The air handling unit 1 is integrated into the building, and the sensors and actuators are connected to the appropriate circuits in the electrical cabinet 10. It is observed that it is possible to configure numerous air handling units of different types, with different configurations, using identical electrical cabinets 10, configured and wired specifically for each unit. However, the electrical cabinet 10 configured for a given unit will only operate with the components of that unit. Air handling unit operation

[0107] The system just described can be operated using an operation web server, for example also embedded.

[0108] The web server for operation allows, for example, the operator to access, via a web interface, the regulation rule of a functional system, and to modify it and / or its parameters.

[0109] The web-based operation server also provides access to a calendar for defining the operational schedules of the air handling unit, such as, for example, the rules in force at night, in the morning and during the day, on weekdays and weekends.

[0110] The web-based operation server also allows users to view alarms or faults that have been issued.

[0111] The web server for operation is configured to control the transition between operating modes. It also allows the definition of launch algorithms. For example, according to a predetermined rule, PLC 6 cannot start the fans if the registers are detected as closed. Air handling unit update

[0112] The air handling unit can be updated very easily.

[0113] This is particularly the case if one wants to modify a regulation rule of the air handling unit.

[0114] If the equipment is already present in the air handling unit, for example, if you now want to regulate the supply temperature also according to the outside temperature, and the air handling unit already includes an outside temperature sensor, you just need to choose the new rule with the web configuration server.

[0115] If necessary, if the air handling unit does not include the equipment in question, simply install it and wire it to the corresponding channel of the electrical cabinet 10 before choosing the new rule with the configuration web server.

[0116] Thus, the air handling unit can evolve with minimal maintenance. LIST OF REFERENCE SIGNS

[0117] 1, 1', 1", 1‴: Air handling unit 2, 2': Duct 3, 3': Air inlet 4, 4': Air outlet 5: Actuator 5a, 5a': Fan 5b: Thermal system 5b1: Heating thermal system 5b2: Cooling thermal system 5c: Humidity control system 5c1: Dehumidification system 5c2: Humidification system 5d: Heat exchanger actuator 5e: Return valve 6: PLC 7: Sensor 7a, 7a': Pressure probe 7b: Temperature sensor 7be: Outdoor temperature sensor 7c: Humidity probe 7d: Antifreeze sensor 8: Mixing system 10: Electrical cabinet 11: Power supply line 12: Terminal block 13: Heat exchanger 14: Return duct 15: Memory 16 Register 17: Filtration system

Claims

1. Method for configuring an air handling unit by means of an on-board configuration web server accessible by an operator via navigation software, successively comprising: . a step during which, by means of the configuration web server, the case of an air handling unit intended to equip a building is described, . a step during which, by means of the configuration web server, a type of air handling unit is selected from a predetermined list of types of air handling units available in the configuration web server, . a step during which, by means of the configuration web server, at least elements of the air handling unit are selected from a predetermined list of elements restricted by the selection of the type of air handling unit, .a step during which, by means of the configuration web server, at least one regulation function is selected from a predetermined list of regulation functions, . a step during which, by means of the configuration web server, said regulation functions are configured, in which the air handling unit (1) comprises said elements and a universal electrical cabinet (10) suitable for any type of air handling unit (1), and set up to operate only with said selected elements, the universal electrical cabinet housing a PLC (6) in which the configuration web server is embedded, and configured with said selected regulation functions.

2. Method for configuring an air handling unit according to claim 1, in which, by means of the configuration web server, the type of air handling unit is selected from a predetermined list of types of air handling units comprising at least two types of air handling units from: {single flow; double flow; double flow with heat exchange by battery, double flow with heat exchange by plate exchanger, double flow for operating theatre}.

3. Method for configuring an air handling unit according to claim 1 or 2, in which, by means of the configuration web server, at least elements of the air handling unit are selected from a predetermined list of elements comprising at least one sensor (7) and at least one actuator or alarm (5).

4. Method for configuring an air handling unit according to claim 3, in which, by means of the configuration web server, at least elements of the air handling unit are selected from a predetermined list of elements comprising at least one of the pairs from the following list: - a temperature probe as a sensor and a thermal system as an actuator; - a pressure probe as a sensor and a fan as an actuator; - a hygrometry probe as a sensor and a humidification and / or dehumidification system as an actuator.

5. Configuration method according to one of claims 1 to 4, in which, by means of the configuration web server, at least one alert / alarm is configured from a predetermined list of alerts / alarms depending on the type of air handling unit.

6. Method for reconfiguring an air handling unit in which, having an air handling unit configured according to the configuration method according to any one of claims 1 to 5: . at least one element is added to the air handling unit, . by means of the configuration web server, at least one added element of the air handling unit is selected from a predetermined list of elements depending on the type of air handling unit, . by means of the configuration web server, at least one new regulation function is selected from a predetermined list of regulation functions depending on the type and the added element of the air handling unit, .by means of the configuration web server, said new regulation function is configured, in which the air handling unit comprises said added element, said universal electrical cabinet (10) being set up to operate further with said added element, the automaton being further configured with said new regulation function.

7. A method of configuring air handling units comprising implementing the method of configuring an air handling unit according to any one of claims 1 to 5 for a plurality of air handling units of different types, wherein the universal electrical cabinets (10) of each air handling unit are set up to operate only with said selected elements of each respective unit and each house a respective controller (6) configured with said selected regulation functions for said respective air handling unit.

8. Set of air handling units each comprising: . at least elements selected from a predetermined list of elements depending on a type of air handling unit chosen from a predetermined list of types of air handling units, . a universal electrical cabinet (10) suitable for any type of air handling unit, and set up to operate only with said selected elements, the universal electrical cabinet housing a PLC incorporating a configuration web server and configured with at least one regulation function selected from a predetermined list of regulation functions depending on the type and elements of the air handling unit, the universal electrical cabinets (10) of the air handling units having the same input / output interfaces.

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