Method for configuring an air handling unit

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. (See Figure 4 for abbreviations.)

Description

Title of the invention: Method for configuring an air handling unit 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 in hospitals, the safety of patients and medical staff is a top priority. 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 is to be treated, by combining elements to implement the desired air treatment functions. During the design of the air handling unit, the controller is configured to operate with its various elements.

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

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

[0006] The invention thus aims to simplify the deployment and use of air handling units, which can vary considerably 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, a type of air handling unit is selected from a predetermined list of air handling unit types. Using the web configuration server, at least some elements of the air handling unit are selected from a predetermined list of elements. Using the web configuration server, at least one control function is selected from a predetermined list of control functions. Using the web configuration server, these regulatory functions are configured. 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 different aspects, it is possible to foresee 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 comprising at least one sensor and at least one actuator or alarm.

[0012] 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 comprising at least one of the pairs in 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 embodiment, using 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.

[0014] According to 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 method, At least one element is added to the air handling unit. Using the web configuration server, at least one added element of the air handling unit is selected from a predetermined list of elements based on the type of air handling unit. Using the web configuration server, at least one new control function is selected from a predetermined list of control functions based on the type and added element of the air handling unit. Using the web configuration server, the new regulation function is configured. in which the air handling unit includes said added element, said universal electrical cabinet being put in place to operate further 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] According to 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 based on a type of air handling unit chosen from a predetermined list of air handling unit types, A universal electrical cabinet suitable for any type of air handling unit, and set up to operate only with the aforementioned selected components; the universal electrical cabinet housing a programmable logic controller (PLC) with an integrated web configuration server and configured with at least one selected control function. a predetermined list of control functions depending on the type and elements of the air handling unit, the universal electrical cabinets of the air handling units having 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:

[0018] [Fig.l] schematically represents an air handling unit according to a first type.

[0019] [Fig.2] schematically represents a control loop.

[0020] [Fig.3] schematically represents a graph showing, on the x-axis, a measure and, on the ordinate the calculated setpoint, the curve therefore showing the calculated setpoint as a function of the measured data, according to an example of implementation.

[0021] [Fig.4] schematically represents an electrical cabinet according to a mode of realization of the invention.

[0022] [Fig.5] schematically represents an air handling unit according to a second type.

[0023] [Fig.6] schematically represents an air handling unit according to a third type.

[0024] [Fig.7] schematically represents an air handling unit according to a fourth type.

[0025] [Fig.8] schematically represents an air handling unit according to a fifth type.

[0026] [Fig.9] schematically represents an air handling unit according to a sixth kind.

[0027] In the drawings, identical references designate identical or similar objects. DETAILED DESCRIPTION

[0028] Figure 1 schematically 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 comprise elements of varying numbers and types depending on the specific characteristics of the building being equipped. The building being equipped is, for example, a service building, such as, in particular, a service building in which the ambient air must be of good quality. quality, typically a service building in the healthcare sector, such as a hospital or clinic. In the description, the terms "exterior" and "interior" are used in reference to this building.

[0029] 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, in particular adapted for an outside air inlet, also called "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...).

[0030] The air handling unit 1 also comprises several elements. Among these elements, 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 particular 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, or in addition, the actuator 5 can be controlled to operate according to one of a plurality of discrete operating modes. Alternatively, or in addition, the actuator 5 can be controlled to operate according to an operating mode that varies discontinuously or continuously with respect to a control parameter.

[0031] 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.

[0032] According to embodiments, 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.

[0033] The sensors 7 are wired to the controller 6, so that the measurements taken by the sensors 7 reach the controller 6. The actuators 5 are wired to the controller 6, so that the commands determined by the controller 6 reach the 5. Alternatively, all or part of these wirings can be replaced by wave communication systems.

[0034] The air handling unit 1 includes a communication system adapted to allow the exchange of information with a supervisory system, a building management system, and / or a centralized technical management system. Communication can be implemented wired and / or wirelessly. For modularity purposes, an open communication protocol, such as BACnet, can be chosen, as defined in the priority date. Thus, the air handling unit 1 is compatible with any commercially available equipment using this communication protocol.

[0035] Considering a functional system comprising a sensor 7, a controller 6, and an actuator 5, the controller 6 is adapted to operate with the actuator 5 and the sensor 7. More precisely, the controller 6 is adapted to control the actuator 5 based on data provided by the sensor 7 and a predetermined rule. The predetermined rule may optionally be configurable.

[0036] 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.

[0037] 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 other.

[0038] 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 fan speed controller 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 communicated by the pressure probe 7a. The controller 6, for example... implements a control loop parameterized by a pressure setpoint value. The pressure setpoint value is, for example, predetermined. According to one embodiment, the PLC 6 implements proportional-integral control, as shown in [Fig.2].

[0039] Depending on the variants, pressure regulation based on the difference between the pressure measured by the pressure probe 7a and atmospheric pressure, or flow regulation based on the difference between the pressures measured upstream and downstream of the ventilation motor, can be implemented.

[0040] 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. In the case where 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 5b 1, also called "hot valve", the description being transposable to the cooling thermal system 5b2, also called "cold valve".For example, a control parameter of the thermal system 5b is its power. 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 temperature probe 7b. The temperature probe 7b is located downstream, near at least one air outlet 4 (see, for example, [Fig. 5]). The controller 6 implements regulation of the thermal system 5b based on the temperature measurements communicated by the temperature probe 7b. The controller 6, for example, implements a control loop parameterized by a temperature setpoint. The temperature setpoint is, for example, predetermined. In one embodiment, the controller 6 implements proportional-integral control.

[0041] Alternatively, the temperature probe 7b measures the ambient temperature. The ambient temperature is a temperature inside the building, for example in a reference room.

[0042] When the functional system comprises both a heating thermal system 5b1 and a cooling thermal system 5b2, the setpoint temperature values ​​are preferably separated by a gap greater than a predetermined threshold, for example, 1°C. The air handling unit may include a valve, known as "6-way valve" allowing connection of both the heating thermal system 5b 1 and the cooling thermal system 5b2.

[0043] 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, according to 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 in Figure 3, below a minimum outside temperature XI, the setpoint temperature is constant. Above a maximum outside temperature X4, the setpoint temperature is constant. Between setpoint temperatures X2 and X3 (between XI and X4), the setpoint temperature varies linearly with the outside temperature, with a positive slope. For example, it is equal to the outside temperature.In this case, regulation is deactivated. The operation between XI and X2 is a linear variation between operation at XI and operation at X2. The operation between X3 and X4 is a linear variation between operation at X3 and operation at X4. The values ​​X2, X3, and even XI and X4 are configurable. The difference between two of these consecutive values ​​can be constrained to be greater than a predetermined threshold. Other implementations are possible.

[0044] 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.

[0045] 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.

[0046] Alternatively or in addition, the thermal system 5b can be more or less complex. For example, it can 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 can also include a pre-treatment heating or cooling system controlled by a preheating temperature probe located at any suitable point.

[0047] 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 each other. Thus, according to one embodiment, the PLC 6 is adapted to regularly determine the setpoint temperature value also from these desired downstream temperature values ​​at the terminals.

[0048] 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 (see [Fig. 5]). The humidity control system 5c is, for example, located between at least one air inlet 3 and at least one air outlet 4. In the case where 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. The following example refers to the 5c2 humidification system.For example, a control parameter of the humidification system 5c2 is its power. This control parameter could, for instance, 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 a sensor 7, a humidity probe 7c. The humidity probe 7c is located downstream, near at least one air outlet 4. The controller 6 implements system control, regulating the humidity 5c based on the humidity measurements communicated by the humidity probe 7c. The controller 6, for example, implements a control loop parameterized by a humidity setpoint. The humidity setpoint is, for example, predetermined. In one embodiment, the controller 6 implements proportional-integral control.

[0049] The description given above for temperature regulation can be transposed to humidity, for example concerning the consideration of ambient humidity, outside humidity, or a request for humidity value from downstream element(s).

[0050] The dehumidification system 5c 1 can cooperate with the heating system 5b. In particular, the cooling system 5b2 can be used for dehumidification. Indeed, by cooling the air, the water vapor condenses and is discharged at the level of the cooling system 5b2. The resulting cold, dry air can be reheated by the heating system 5b 1 downstream of the cooling system 5b2.

[0051] 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 in 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 passage area for the airflow 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 to the controller 6.

[0052] Whatever actuator 5 is 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, commanding the actuator 5 not to operate, or to operate in fault mode.

[0053] The controller 6 can also determine the existence 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.

[0054] 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 5b 1, 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.

[0055] According to 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 for the replacement of 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.

[0056] The air handling unit 1 can thus include other sensors 7 capable of generating 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).

[0057] 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.

[0058] 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.

[0059] According to one embodiment, as shown in [Fig. 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 may provide the controller 6 with data relating to the outside air, the inside air, and / or the mixing level.

[0060] Figure 4 schematically represents an electrical cabinet 10 for the air handling unit 1 of Figure 1. The 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 adapted 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 channels 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 channels 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.

[0061] Thus, in the example of the air handling unit 1 of [Fig. 1], the 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 outside temperature sensor, and the inlet port 12ec is connected to the probe humidity level 7c, and the other inlet ports are not connected. Outlet port 12sa is connected to fan 5a, outlet port 12sbl is connected to heating system 5bl, outlet port 12sb2 is connected to cooling system 5b2, outlet port 12scl is connected to dehumidification system 5cl, outlet port 12sc2 is connected to humidification system 5c2, and the other outlet ports are not connected.

[0062] The connections can be made in any suitable manner. Alternatively or in addition, some paths could be connected wirelessly while retaining the same basic architecture.

[0063] The electrical cabinet 10 houses the programmable logic controller (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, depending on the type of control unit, be occupied or free.

[0064] The automaton 6 incorporates an embedded web configuration server used to configure the automaton 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.

[0065] The air handling unit 1 according to the embodiment of [Fig.1] can be controlled in several alternative ways, without any maintenance intervention on the air handling unit 1. It is sufficient to modify the configuration of the controller 6 to apply the desired rule.

[0066] Thus, for example, several identical air handling units 1, i.e. comprising the same elements, can be used for several buildings, but operate differently from each other by the simple configuration of the controller 6.

[0067] Alternatively or in addition, the same air handling unit 1 can easily be operated in several alternative 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 a first 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 (alternation of day / night), weekly rhythm (alternation of weekdays and weekends), seasonal rhythm (alternation of cold and hot, dry and humid seasons), and / or other rhythms.

[0068] Figures 5 and 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.

[0069] Figure 5 schematically represents an air handling unit 1' of another type. The air handling unit 1' shown in Figure 5 is a dual-flow air handling unit.

[0070] The treatment of the 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 "supplying".

[0071] 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 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".

[0072] 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.

[0073] According to 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.

[0074] 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 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. 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 a control system The fan 5a' operates according to the pressure measurements communicated by the pressure sensor 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 [Fig. 2]. [Fig. 2] schematically represents the measurement from sensor 7, the setpoint stored in memory 15, both given to the controller 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 sent to the actuator 5.

[0075] Thus, in the example of the air handling unit 1 of [Fig.5], in addition to the connections described above, the inlet channel 12ea' is connected to the pressure probe 7a' and the outlet channel 12sa' is connected to the fan 5a', and the other inlet and outlet channels are not connected.

[0076] In the preceding description, the incoming and outgoing paths are autonomous but controlled by the same electrical cabinet.

[0077] For this type of control unit, it is possible, alternatively, to control the incoming and outgoing channels in an interdependent manner.

[0078] For example, the controller 6 is configured to control at least one actuator 5 or a warning device on the incoming channel also based on at least one data point from a sensor 7 on the outgoing channel. Alternatively or in addition, the controller 6 is configured to control at least one actuator 5 or a warning device on the outgoing channel also based on data point from at least one sensor 7 on the incoming channel.

[0079] It follows from the above that the air handling unit 1 according to the embodiment of [Fig.5] can be controlled according to several alternative configurations, without any maintenance intervention on the air handling unit.

[0080] Thus, for example, several identical air handling units 1' can be provided, as shown in [Fig.5], assigned to several buildings, but operating differently from each other by the simple configuration of the controller 6.

[0081] Alternatively or in addition, the same air handling unit 1' as shown in [Fig.5], can easily be implemented in several alternative configurations, by simply modifying the configuration of the controller 6.

[0082] Furthermore, the air handling unit 1 as shown in [Fig. 1] and the air handling unit 1' as shown in [Fig. 5] can 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 implementable control rules specific to each air handling unit 1, 1'. Thus, for air handling unit 1 of [Fig. 1], the available control rules for an actuator 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.

[0083] Fig. 6 schematically represents a 1” air handling unit of another type.

[0084] The air handling unit 1” in question is also a dual-flow unit. Compared to the air handling unit 1' of [Fig. 5], it incorporates a heat exchanger 13 between the incoming and outgoing airflows. Such a heat exchange allows, in particular, the incoming air from outside to be heated with the outgoing air from inside, when the incoming air is warmer than the outgoing air, thus reducing the energy that the heating system 5b 1 must consume.

[0085] 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 5b 1 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.

[0086] Furthermore, the air handling unit 1” of [Fig. 6] 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 heat transfer fluid circulation pump 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.

[0087] Various heat exchange technologies are possible, such as a plate heat exchanger as shown in [Fig. 7]. The control rules that can be implemented by the controller 6 depend on the type of power plant.

[0088] Figure [Fig.8] schematically represents an air handling unit 1" according to another type, called "operating block".

[0089] The air handling unit 1”' in question is also a dual-flow unit. Compared to the air handling unit 1' of [Fig. 5], it incorporates 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 heat contribution, as described above, thereby reducing the energy that the heating system 5b 1 must consume.

[0090] 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 5b 1 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.

[0091] Furthermore, the air handling unit 1"' of [Fig. 8] includes an actuator 5 such as a return air valve 5e, which is connected to a dedicated output port 12se of the electrical cabinet 10. The controller 6 applies a predetermined rule to determine a command for the return air valve 5e based on input data, such as, for example, the temperatures measured in the inlet and outlet ports, or even the outside temperature and / or the flow rates of the inlet and / or outlet ports. The command is, for example, a command to open the return air valve 5e, parameterized by an opening size of the return air valve 5e. Alternatively, a flow rate could be controlled through the return air valve 5e.

[0092] As shown in [Fig. 8], in 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 in the air handling unit 1”” shown in [Fig. 9], where the return duct 14 terminates upstream of the air handling devices of the inlet. The control rules that can be implemented by the controller 6 depend on the type of unit.

[0093] Regardless of the type of air handling unit considered, the controller 6 can be configured to implement an operating mode for the air handling unit chosen from several operating modes. For example, one operating mode is "Off," in which no functional system is regulated. Another operating mode is "Occupancy," also called "Comfort," which corresponds to the nominal operating mode of the air handling unit, in which each of the functional systems is regulated. Another operating mode is "Unoccupied," in which, for the air handling unit, a set of setpoint values ​​is modified compared to the "Occupancy" mode, particularly with a view to reducing energy consumption. One operating mode is a "disinfection" mode, in which the air handling unit is regulated to disinfect a room such as an operating theater. This disinfection process utilizes a room disinfection machine, and the air handling unit is then configured to treat the air in a manner compatible with the disinfection process.

[0094] Thus, the electrical cabinet 10 is capable of receiving as input one and / or the other of the measured quantities coming from the following sensors: - Temperature probes: - Downstream of the heat exchanger, - Preheating, - Ambient, - Resumption, - Blowing, - Fresh air; - Pressure probes: - Ambient, - Resumption, - Blowing ; - Humidity probes: - Ambient, - Resumption, - Blowing.

[0095] More specifically, the electrical cabinet 10 is capable of receiving as input one and / or the other of the measured quantities from the following sensors: Downstream heat exchanger temperature probe, Preheating temperature probe, Ambient temperature probe, Return air temperature probe, Supply air temperature probe, Fresh air temperature probe, Ambient pressure probe, Return air pressure probe, Supply air pressure probe Pressure switch indicates low water level in the heat exchanger. Antifreeze pressure switch for plate heat exchanger, Temperature potentiometer, Ambient humidity sensor, Return air humidity sensor - Humidity probe for air supply, - Pressure switch for return filter, - Pressure switch for filter in operating room - Pressure switch for the blower filter, - Pressure switch for the blower pre-filter, - Operating room air filter pressure switch - New air filter pressure switch.

[0096] Where applicable, the electrical cabinet 10 does not include enough channels to connect all the sensors, actuators and warning devices, and the operator defines, via a human-machine interface allowing access to the configuration web server, the quantity associated with some of the channels.

[0097] Automaton 6 provides access to the following functionalities: - Choice of options (for air handling units including less common components 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 zone, particularly in an operating room, - Occupancy register - for air handling units 1 including a register controllable according to a building occupancy parameter. - Choice of operating mode: - Stop, - Reduced - operation in a low-energy consumption mode - in this mode, for example, the registers are only partially open, - Comfort, - Restart - transition function between "reduced" and "comfort" operating modes, which can be activated by an occupant, for example by pressing a restart button. - Disinfection.

[0098] The automaton 6 is capable of implementing at least one or more of the following functionalities: - Temperature regulation: - Temperature regulation of hot and cold air supply valves according to terminal demand with priority. - Temperature regulation of the hot and cold water return valves with potentiometer. - Temperature regulation of hot and cold water return valves with fixed setpoint - Temperature regulation of the hot water valve return with a fixed setpoint. - Temperature regulation of the cold water return valve with a fixed setpoint. - Ambient temperature regulation via hot and cold water valves with fixed setpoints - Ambient temperature regulation with hot water valve and fixed setpoint - Ambient temperature regulation with cold valve and fixed setpoint - Hot and cold air supply temperature regulation depending on the temperature setting measured with a potentiometer. - Temperature regulation of hot and cold air supply valves with potentiometer. - Temperature regulation of the hot and cold air supply valves according to ambient temperature. - Temperature regulation of hot and cold air supply valves according to return air temperature. - Temperature regulation of the hot and cold air supply valves according to the outside temperature. - Temperature regulation of hot and cold air supply valves with fixed setpoint, - Hot air supply temperature regulation with fixed setpoint valve, - Cold air supply temperature regulation with fixed setpoint; - Pressure regulation: - Resumption, - Blowing ; - Flow regulation: - Resumption, - Blowing ; - Regulation of recovery: - Heat recovery regulation via pump based on temperature difference. - Regulation of plate heat exchanger recovery based on temperature difference with regulating control and anti-freeze pressure switch for plate heat exchanger safety. - Heat recovery regulation with pump according to temperature threshold; Absolute humidity regulation: - Dehumidification and humidification control with fixed setpoint - Humidification control resumed with a fixed setpoint. - Dehumidification control resumes with a fixed setpoint. - Regulation of dehumidification and ambient humidification with fixed setpoint, - Ambient humidity control with fixed setpoint, - Regulation of dehumidification and ambient humidity - Dehumidification and humidification humidity control Air supply based on humidity level. - Dehumidification regulation of supply humidity according to return humidity. - Dehumidification and humidification control for supply air with a fixed setpoint, - Humidification and air supply control with fixed setpoint - Dehumidification and supply air regulation with fixed setpoint; Relative humidity regulation: - Dehumidification and humidification control with fixed setpoint - Humidification control resumed with a fixed setpoint. - Dehumidification control resumes with a fixed setpoint. - Regulation of dehumidification and ambient humidification with fixed setpoint, - Ambient humidity control with fixed setpoint, - Regulation of dehumidification and ambient humidity - Dehumidification and humidification humidity control Air supply based on humidity level. - Dehumidification regulation of supply humidity according to return humidity. - Dehumidification and humidification control for supply air with a fixed setpoint, - Humidification and air supply control with fixed setpoint - Dehumidification and supply air regulation with fixed setpoint.

[0099] The PLC 6 also allows for warning of the following faults: - Anti-freeze thermostat, - Smoke detector, - Presence of tension, - Fire detection, - Ventilation stopped, - Filters: - Resumption, - Resumption of operating room procedures, - Fresh air, - New air pre-filter, - Blower pre-filter, - Operating room ventilation, - Blowing.

[0100] Thus, the electrical cabinet 10 is capable of outputting a control signal to one and / or the other of the following actuators: - Registers: - Rejection, - Resumption, - Blowing, - Fresh air, - Bypass (register allowing bypassing a component of the air handling unit), - Disinfection, - Occupation; - Actuators: - Cold valve, - Hot valve, - Vanneôvoies, - Preheating valve, - Blower fan, - Fan resumption, - Humidifier, - Recovery pump, - Occupancy register.

[0101] More specifically, the electrical cabinet 10 is capable of outputting a control signal to one and / or the other 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, - Variable speed drive, - Variable airflow control, - Restart push button, - Recovery pump fault, - Humidifier fault, - Humidifier malfunction, - Faulty variable speed drive, - Blower speed control fault, - End-of-cycle summary of registers, - Antifreeze thermostat fault, - Smoke detector malfunction, - Voltage presence fault, - Fire detection fault, - Ventilation system stopped working.

[0102] Air handling unit configuration

[0103] The system just described can be configured as follows. The configuration is performed by the embedded web configuration server. This is accessible by an operator via a web browser, possibly after authentication.

[0104] The first step involves configuring an air handling unit. To begin, we describe the case of a new air handling unit intended to equip a building.

[0105] The operator first selects the type of air handling unit intended to equip 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 with a plate heat exchanger, a dual-flow operating room air handling unit as described above, or other available types.

[0106] The choice of the type of control unit will restrict the list of elements, sensors, actuators, warning devices, control rules and alerts / faults available during configuration.

[0107] 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.

[0108] The elements include, for example, actuators, sensors and warning devices.

[0109] 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 the channel in question. This prevents oversizing the electrical cabinet 10.

[0110] 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.

[0111] This choice is made for example for the supply path and the return path.

[0112] 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 valve supply temperature control with potentiometer.

[0113] Then, the operator chooses his humidity control rule from among the rules available in absolute or relative humidity.

[0114] Then, the operator chooses its recovery rule from the available rules.

[0115] Then the operator configures his alerts, and sets up his sensors or actuators.

[0116] Commissioning of the air handling unit

[0117] The air handling unit 1 is integrated into the building, and the sensors and actuators are connected to the appropriate circuits of the electrical cabinet 10. It is observed that it is possible to configure numerous air handling units of different types, with different configurations, implementing 10 identical electrical cabinets, configured and wired in a way specific to each one. However, the electrical cabinet 10 configured for a power plant will only operate with the elements of the power plant.

[0118] Operation of the air handling unit

[0119] The system just described can be operated by means of an operation web server, for example also embedded.

[0120] The web operation server 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.

[0121] The web 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.

[0122] The web operation server also allows viewing of alarms or faults issued.

[0123] The web server for operation is configured, in particular, to control the transition from one operating mode to another. It also allows the definition of launch algorithms. For example, according to a predetermined rule, the PLC 6 cannot start the fans if the registers are detected as closed.

[0124] Air handling unit update

[0125] The air handling unit can be updated very easily.

[0126] This is particularly the case if we want to modify a regulation rule of the air handling unit.

[0127] If the equipment is already present in the air handling unit, for example, we now want to regulate the supply temperature also according to the outside temperature, and the air handling unit already includes an outside temperature sensor, it is enough to choose the new rule with the configuration web server.

[0128] If necessary, if the air handling unit does not include the equipment in question, it is sufficient to install it and wire it to the corresponding channel of the electrical cabinet 10 before choosing the new rule with the configuration web server.

[0129] Thus, the air handling unit can evolve with minimal maintenance. List of reference signs

[0130] 1, 1', 1”, 1”': air handling unit

[0131] 2, 2': conduit

[0132] 3, 3': air inlet

[0133] 4, 4': air outlet

[0134] 5: actuator

[0135] 5a, 5a': fan

[0136] 5b: thermal system

[0137] 5b 1: thermal heating system

[0138] 5b2: thermal cooling system

[0139] 5c: humidity regulating system

[0140] 5cl: dehumidification system

[0141] 5c2: humidification system

[0142] 5d: heat exchanger actuator

[0143] 5th: recirculation valve

[0144] 6: automaton

[0145] 7: sensor

[0146] 7a, 7a': pressure probe

[0147] 7b: temperature sensor

[0148] 7be: outdoor temperature sensor

[0149] 7c: humidity probe

[0150] 7d: Antifreeze sensor

[0151] 8: mixing system

[0152] 10: electrical cabinet

[0153] 11: power supply route

[0154] 12: terminal block

[0155] 13: heat exchanger

[0156] 14: take-up duct

[0157] 15: memory

[0158] 16: register

[0159] 17: filtration system

Claims

Demands

1. A method for configuring an air handling unit using an embedded web configuration server accessible by an operator via a web browser, comprising successively: . a step in which, using the web configuration server, the case of an air handling unit intended to equip a building is described, . a step in which, using the web configuration server, a type of air handling unit is selected from a predetermined list of air handling unit types available in the web configuration server, . a step in which, using the web configuration server, at least some elements of the air handling unit are selected from a predetermined list of elements restricted by the selection of the air handling unit type, .a step in which, by means of the configuration web server, at least one control function is selected from a predetermined list of control functions, . a step in which, by means of the configuration web server, said control functions are set up, 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 controller (6) in which the configuration web server is embedded, and configured with said selected control functions.

2. A method for configuring an air handling unit according to claim 1 wherein, 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 coil, double flow with heat exchange by plate heat exchanger, double flow for operating room}.

3. A method for configuring an air handling unit according to claim 1 or 2 wherein, by means of the configuration web server, at least some 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. A method for configuring an air handling unit according to claim 3, wherein, by means of the configuration web server, at least some elements of the air handling unit are selected from a predetermined list of elements comprising at least one of the following pairs: - 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.

5. A configuration method according to any one of claims 1 to 4 wherein, 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. A method for reconfiguring an air handling unit, wherein: having an air handling unit configured according to the configuration method of any one of claims 1 to 5, . 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 (10) being put in place to operate further with said added element, the controller being further configured with said new control function.

7. A method for configuring air handling units comprising implementing the method for 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 control functions selected for said respective air handling unit.

8. A set of air handling units, each comprising: . at least some elements selected from a predetermined list of elements based 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 controller with an integrated web configuration server and configured with at least one control function selected from a predetermined list of control functions based 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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