CN116592421A - Fresh air boost module for fan coil units - Google Patents

Fresh air boost module for fan coil units Download PDF

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Publication number
CN116592421A
CN116592421A CN202310105629.1A CN202310105629A CN116592421A CN 116592421 A CN116592421 A CN 116592421A CN 202310105629 A CN202310105629 A CN 202310105629A CN 116592421 A CN116592421 A CN 116592421A
Authority
CN
China
Prior art keywords
air
fresh air
boost module
coil unit
fan coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310105629.1A
Other languages
Chinese (zh)
Inventor
F·贡萨尔维斯德利玛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
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Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Publication of CN116592421A publication Critical patent/CN116592421A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/01—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/00075—Indoor units, e.g. fan coil units receiving air from a central station
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation
    • F24F2011/0002—Control or safety arrangements for ventilation for admittance of outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F2012/007—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using a by-pass for bypassing the heat-exchanger

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

A fresh air boost module (10) for attachment to a fan coil unit (12) for introducing air from an outdoor environment, wherein the fresh air boost module comprises: a first inlet (14) for connection to an outlet (24) of the fan coil unit; a second inlet (16) for connection to an air treatment unit; an outlet (18) for discharging the outdoor air and the conditioned air; and a combined volume (20) in communication with the first inlet, the second inlet and the outlet; wherein, in use, the flow of outdoor air from the second inlet through the combined volume to the outlet creates a pressure gradient that induces a flow of air from the fan coil unit through the first inlet and into the fresh air boost module.

Description

Fresh air boost module for fan coil units
Technical Field
The present invention relates to a fresh air booster module (plenummodule) for introducing fresh air into an indoor environment, wherein the fresh air booster module is for fitting to a fan coil unit (fancoiutenit). The invention also relates to a corresponding method of operating a system comprising a fan coil unit equipped with a fresh air boost module.
Background
Conventionally, an Air Handling Unit (AHU) or the like is responsible for the distribution of fresh air within a commercial or industrial building such as a hotel or office. For example, an AHU takes fresh ambient air from outside (e.g., outdoors) and distributes it via one or more ducts to one or more rooms (e.g., indoors) inside a building. One or more of these rooms may each include a Fan Coil Unit (FCU) that is responsible for conditioning (e.g., heating and/or cooling) the air in its associated room.
A typical FCU includes a heat exchanger coil and a fan. The coil is configured to receive hot or cold fluid from the center device and the fan is configured to blow or draw air from the room through the coil such that heat can be exchanged between the air flow and the fluid in the coil.
It would be beneficial if the flow of fresh ambient air introduced into a room of a building could be used to increase the efficiency of operating an FCU located in the room.
Disclosure of Invention
According to a first aspect of the present invention there is provided a fresh air boost module for attachment to a fan coil unit for introducing air from an outdoor environment, wherein the fresh air boost module comprises: a first inlet for connection to an outlet of the fan coil unit; a second inlet for connection to an air handling unit; an outlet for discharging the outdoor air and the conditioned air; and a combined volume (mergingvolume) in communication with the first inlet, the second inlet, and the outlet; wherein, in use, the flow of outdoor air from the second inlet through the combined volume to the outlet creates a pressure gradient that induces a flow of conditioned air from the fan coil unit through the first inlet and into the fresh air boost module.
With the fresh air boost module described above, the pre-existing fan coil unit can be easily modified to increase fresh (outdoor) air injection capacity, wherein the injection of fresh air causes an increase in the flow of conditioned air through the fan coil unit. Thus, upon new installation or as a retrofit to a previously installed fan coil unit, it becomes possible to add the proposed fresh air boost module to thereby introduce fresh air inducing functionality into the system, which increases the efficiency of operating the fan coil unit (when the fan is operated), and also provides a new mode of operating the fan coil unit (wherein the fan is not operated), which allows the system to provide some air conditioning with greatly reduced energy consumption.
The flow of outdoor air through the combined volume results in a drop in static pressure in the combined volume. This reduction in pressure in the combined volume (e.g., creating a negative (gauge) pressure) relative to the pressure in the fan coil unit causes air to be passively drawn from the fan coil unit through the first inlet and into the fresh air boost module. Thus, the flow of outdoor air through the combined volumes induces an air flow through the fan coil unit.
The fresh air boost module is considered a new air boost module because it is configured/adapted to introduce new air into the fan coil unit system and/or its environment, the new air being fresh/outdoor air.
On the other hand, conditioned air is air from the environment (e.g., indoor, hotel room) that has passed through the coils of the fan-coil unit (so that heat can be exchanged between the air flow and the fluid in the coils).
In some implementations, the fresh air boost module is advantageously configured to induce a flow of conditioned air through the fan coil unit at an air flow rate between 20% and 300% of the air flow rate through the second inlet (e.g., a maximum air flow rate that may be generated by the AHU).
The fresh air boost module may include at least one nozzle fluidly connected to the second inlet for injecting the outdoor air into the combined volume.
The fresh air boost module may include: a first plenum connected to the second inlet and configured to supply outdoor air to at least one first nozzle; and a second plenum connected to the second inlet and configured to supply outdoor air to the at least one second nozzle.
The first plenum may be located on a first inner side of the fresh air plenum module; and the second plenum may be located on a second inner side of the fresh air plenum module; wherein the first inner side and the second inner side are in facing spaced relation.
The second inlet may be configured to evenly distribute the flow of outdoor air from the air handling unit between the first plenum and the second plenum.
The second inlet may be configured to direct more than half of the flow of outdoor air from the air handling unit to the first plenum.
The second inlet may be configured to direct more than half of the flow of outdoor air from the air handling unit to the second plenum.
The volume of the first pumping chamber may be the same as the volume of the second pumping chamber.
The volume of the first pumping chamber may be greater than the volume of the second pumping chamber.
The volume of the second pumping chamber may be greater than the volume of the first pumping chamber.
The width of the or each first nozzle may be the same as the width of the outlet.
The width of the or each second nozzle may be the same as the width of the outlet.
The or each first nozzle may be rectangular or semi-circular in shape.
The or each second nozzle may be rectangular or semi-circular in shape.
The shape of the or each first nozzle and/or the shape of the or each second nozzle may be configured to induce a flow of air at a predetermined air flow rate.
The or each first nozzle may be the same shape as the or each second nozzle.
The shape of the or each first nozzle may be different from the shape of the or each second nozzle.
The at least one first nozzle may be a first set of nozzles; and the at least one second nozzle may be a second set of nozzles.
The first set of nozzles may include more nozzles than the second set of nozzles.
The second set of nozzles may include more nozzles than the first set of nozzles.
The first set of nozzles may comprise a plurality of nozzles distributed in a straight line facing the outlet.
The first set of nozzles may comprise a plurality of nozzles distributed in a plurality of straight lines facing the outlet.
In the case where the first set of nozzles are distributed in a plurality of straight lines, the nozzles in one line may be offset from the nozzles in the adjacent line(s).
The second set of nozzles may comprise a plurality of nozzles distributed in a straight line facing the outlet.
The second set of nozzles may comprise a plurality of nozzles distributed in a plurality of straight lines facing the outlet.
In the case where the second set of nozzles are distributed in multiple straight lines, the nozzles in one line may be offset from the nozzles in the adjacent line(s).
The arrangement of the first set of nozzles and/or the arrangement of the second set of nozzles may be configured to suit the target FCU.
The arrangement of the first set of nozzles and/or the arrangement of the second set of nozzles may be configured to induce a flow of air at a predetermined air flow rate.
The arrangement of the first set of nozzles and/or the arrangement of the second set of nozzles may be configured to maintain a predetermined pressure in the first plenum and/or the second plenum, respectively.
The nozzle wall of the first plenum may include a curved portion.
The nozzle wall of the first plenum may comprise a straight portion and the angle between the straight portion and the first inner side of the fresh air plenum module is less than 60 degrees, preferably less than 30 degrees.
The nozzle wall of the second plenum may include a curved portion.
The nozzle wall of the second plenum may comprise a straight portion and the angle between the straight portion and the second inner side of the fresh air plenum module is less than 60 degrees, preferably less than 30 degrees.
According to a second aspect of the present invention there is provided a system comprising a fresh air boost module according to the first aspect and a fan coil unit, wherein the first inlet of the fresh air boost module is coupled to the outlet of the fan coil unit.
The system may include an air handling unit, wherein the second inlet of the fresh air boost module is connected to the outlet of the air handling unit.
The fan coil unit may have a controller configured to independently operate the coils of the fan coil unit and the fans of the fan coil unit.
The controller may be configured to operate the system in an inducible mode.
The induction pattern may be defined as: the coil of the fan coil unit is operated and the fan of the fan coil unit is not operated, and wherein the flow of conditioned air through the fan coil unit is induced by a pressure gradient created by the flow of outdoor air through the fresh air boost module.
The controller may be configured to operate the system in an enhanced mode.
The enhancement mode may be defined as: operating the coils of the fan coil unit and operating the fans of the fan coil unit, and wherein the flow of conditioned air through the fan coil unit is provided by the pressure gradient created by the flow of outdoor air through the fresh air boost module and the operation of the fans.
The controller may be configured to operate the system in an eco mode.
The eco mode may be defined as: the coil of the fan coil unit is not operated and the fan of the fan coil unit is not operated, and wherein the flow of the outdoor air through the fresh air boost module creates a pressure gradient that induces a flow of air through the fan coil unit.
It is therefore apparent that the "eco mode" is an operating mode in which the fan coil unit is turned off and/or does not consume power (or at least consumes low power). Thus, as used herein, "eco mode" is also understood to mean "economy mode" or "green mode".
According to a third aspect, there is provided a method of installing a fresh air boost module or system according to the first or second aspect, the method comprising: providing a fresh air boost module; fitting a first inlet of a fresh air boost module to an outlet of a fan coil unit; and connecting the second inlet of the fresh air boost module to the outlet of the air handling system.
According to a fourth aspect, there is provided a method of operating a system according to the second aspect, the method comprising operating the system in an induction mode, the induction mode comprising: providing outdoor air to a second inlet of the fresh air boost module; operating a coil of the fan coil unit; and not operating a fan that causes the fan coil unit; wherein the flow of conditioned air through the fan coil unit is induced by a pressure gradient created by the flow of outdoor air through the fresh air boost module.
The method may include operating the system in an enhanced mode, the enhanced mode including: providing outdoor air to a second inlet of the fresh air boost module; operating a coil of the fan coil unit; a fan operating the fan coil unit; wherein the flow of conditioned air through the fan coil unit is provided by a pressure gradient created by the flow of outdoor air through the fresh air boost module and the operation of the fan.
The method may include operating the system in an eco mode, the eco mode comprising: providing outdoor air to a second inlet of the fresh air boost module; not operating the coils of the fan coil unit; and not operating the fan of the fan coil unit; wherein the pressure gradient created by the flow of the outdoor air through the fresh air boost module induces a flow of air through the fan coil unit.
Drawings
The invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
FIG. 1 illustrates a fresh air boost module and a fan coil unit;
FIG. 2 illustrates the fresh air boost module of FIG. 1 connected to the fan coil unit of FIG. 1;
FIG. 3 is a cross-sectional side view of the system of FIG. 2;
FIG. 4 shows a cross-sectional front view of the fresh air boost module of FIGS. 1 and 2 without the fan coil unit; and
fig. 5 shows a perspective view of another fresh air boost module.
Detailed Description
Fig. 1 shows a fresh air boost module 10 and a fan coil unit 12, and fig. 2 and 3 show a system including a fresh air boost module 10 coupled to a fan coil unit 12. This connection may be accomplished as a modification to the system with the pre-existing fan coil unit 12 to provide increased air injection capacity, or it may be accomplished with the installation of the fan coil unit 12. The fresh air boost module 10 is used to introduce a fresh air flow from the outdoor environment to induce a flow of (conditioned) air through the fan coil unit, which increases the efficiency of operating the fan coil unit (when the fan is operated), and also provides a new mode of operating the fan coil unit (where the fan is not operated) which allows the system to provide a small amount of air conditioning with greatly reduced energy consumption.
The fresh air boost module includes a first inlet 14 for connection to an outlet 24 of the fan coil unit 12, a second inlet 16 for connection to an air handling unit (not shown), an outlet 18 for discharging outdoor air and conditioned air, and a combined volume 20 in communication with the first inlet 14, the second inlet 16, and the outlet 18.
Fig. 3 and 4 show further details of the fan coil unit 12 and the fresh air boost module 10.
The fan coil unit 12 includes an inlet 22, an outlet 24, a fan 26, and a heat exchanger coil 28. The coil 28 is configured to receive hot or cold fluid from a central source (not shown), and the fan 26 is configured to blow/draw air from the room through the coil 28 so that heat can be exchanged between the air flow and the fluid in the coil 28. The fan coil unit 12 also includes a controller (not shown) that is capable of operating the fan 26 and coil 28 separately and independently of each other.
In particular, the fresh air boost module 10 includes a first boost chamber 30a and a second boost chamber 30b. The first and second plenums 30a and 30b are connected to the second inlet 16 such that outdoor air can flow from the second inlet 16 into either of the first and second plenums 30a and 30b.
In this example, the first plenum 30a is located on a first interior side of the fresh air plenum module 10, which is the top side of the fresh air plenum module 10. The second plenum 30b is located on a second inner side of the fresh air plenum module 10, which is the bottom side of the fresh air plenum module 10. Thus, the first inner side and the second inner side are in facing spaced relation. The first and second plenums 30a and 30b extend along the entire width of the first and second inner sides, respectively.
In this example, the volume of the first pumping chamber 30a is the same as the volume of the second pumping chamber 30b. However, the volume of the first pumping chamber 30a may be greater than the volume of the second pumping chamber 30b, or the volume of the second pumping chamber 30b may be greater than the volume of the first pumping chamber 30a.
The fresh air boost module 10 includes an air distributor 32, the air distributor 32 being configured to distribute the flow of outdoor air from the second inlet 16 between the first and second plenums 30a and 30b. In this example, the air distributor 32 is configured to evenly distribute the outdoor air flow from the second inlet 16 between the first plenum 30a and the second plenum 30b, but the air distributor 32 may be configured to unevenly distribute the outdoor air flow from the second inlet 16 between the first plenum 30a and the second plenum 30b depending on environmental requirements.
The first plenum 30a is configured to supply outdoor air to the first set 34a of one or more nozzles 34, and the second plenum 30b is configured to supply outdoor air to the second set 34b of one or more nozzles 34.
Each nozzle 34 is configured to inject outdoor air into the combined volume 20 of the fresh air boost module 10. As such, each nozzle 34 may be shaped to provide a high velocity jet of outdoor air into the combined volume 20. Each nozzle 34 faces/points towards the outlet 18.
The first set of nozzles 34a and the second set of nozzles 34b are configured to provide air jet flow characteristics according to system/environment requirements.
In the exemplary fresh air plenum 10 of fig. 1-4, the first set of nozzles 34a includes the same number of nozzles 34 as the second set of nozzles 34 b; however, the first set of nozzles 34a may include more nozzles 34 than the second set of nozzles 34b, or the second set of nozzles 34b may include more nozzles 34 than the first set of nozzles 34 a.
The first set of nozzles 34a are distributed over the nozzle wall of the first plenum 30a. The first set of nozzles 34a includes four rows of nozzles 34, each row including a straight line of nozzles 34 facing the outlet 18. Each row of nozzles 34 is offset from the row of nozzles adjacent thereto to form a "staggered" arrangement.
The second set of nozzles 34b are distributed on the nozzle wall of the second plenum 30b. In this example, the second set of nozzles 34b is arranged in the same manner as the first set of nozzles 34 a.
In this example, as shown in fig. 3, the nozzle wall of the first plenum 30a and the nozzle wall of the second plenum 30b each include a curved portion over which the nozzles 34 are distributed. The curved portions are secured to the first inner side and the second inner side, respectively.
Fig. 5 shows another example of a fresh air plenum 100. The fresh air plenum 100 is similar to the fresh air plenum 10 except that it has differently shaped plenums 30a, 30b and different nozzle 34 arrangements.
For example, the nozzle wall of the first plenum 30a and the nozzle wall of the second plenum 30b each include straight portions. The straight portion of the nozzle wall of the first plenum 30a is at an angle of 60 degrees to the first inner side of the fresh air plenum module 100. The straight portion of the nozzle wall of the second plenum 30b is at an angle of 60 degrees to the second inner side of the fresh air plenum module 100.
The nozzle wall of each plenum 30a, 30b also includes a curved portion that protrudes into the combined volume 20 and a second straight portion that joins the curved portion to the edge of the outlet 18. It can thus be seen that the volume of the pumping chambers 30a, 30b of the fresh air pumping module 100 is greater than the volume of the pumping chambers 30a, 30b of the fresh air pumping module 10.
The first set of nozzles 34a are distributed over the nozzle wall of the first plenum 30a. The first set of nozzles 34a includes four nozzles 34 spaced apart from one another, each nozzle facing toward the outlet 18. Each nozzle 34 is rectangular in shape and extends across the entire width of the outlet 18.
The second set of nozzles 34b are distributed over the nozzle walls of the second plenum 30b in the same manner as the first set of nozzles 34 a.
In both examples, the first plenum 30a is identical to the second plenum 30b. In particular, the second set of nozzles 34b is arranged in the same manner as the first set of nozzles 34 a. However, depending on the circumstances, the arrangement and nozzle walls of the second set of nozzles 34 of the second plenum 30b may be different from the first plenum 30a.
In other words, the shape, number, and arrangement of the nozzles of the first set of nozzles 34a and/or the nozzles of the second set of nozzles 34b may be selected to accommodate different types of fan coil units and/or different shapes of the interior/housing of the booster modules 10, 100.
The fresh air boost modules 10, 100 may be assembled to the fan coil units 12 prior to installation of the system or may be retrofitted to pre-installed fan coil units 12.
To connect the fresh air boost modules 10, 100 to the fan coil unit 12, the first inlet 14 is fitted to the outlet 24 of the fan coil unit 12. The second inlet 16 of the fresh air boost module 10, 100 is fluidly connected (e.g., via a pipe or piping network) to an outlet (not shown) of the air treatment system.
In use, the system including the fresh air boost modules 10, 100 and the fan coil units 12 may be operated in one of an induction mode, an enhancement mode, and an eco mode.
In the induction mode of operation, fresh/outdoor air is provided to the second inlet 16 of the fresh air boost module 10, 100, the coils 28 of the fan-coil unit 12 are manipulated (to condition the air by heating or cooling), and the fans 26 of the fan-coil unit 12 are not operated. The flow of fresh/outdoor air from the second inlet 16 through the combined volume 20 and out the outlet 18 causes a pressure drop in the combined volume 20. This negative (calculated) pressure in the combined volume 20 passively draws air from the fan coil unit 12 through the first inlet 14 and into the fresh air plenum modules 10, 100. Thus, the flow of fresh/outdoor air through the fresh air boost modules 10, 100 induces a flow of air through the fan coil unit 12 and the fresh air boost modules 10, 100, which is regulated by the coil 28 as it passes through the coil 28.
Thus, the induced mode of the system is able to provide fresh air circulation and conditioning functions without the need to operate the blower 26, thereby reducing the energy consumption required for such functions compared to existing air conditioning systems.
In the boost mode of operation, fresh/outdoor air is provided to the second inlet 16 of the fresh air boost module 10, 100, the coil 28 of the fan coil unit 12 is operated (to condition the air by heating or cooling), and the fan 26 of the fan coil unit 12 is operated to draw air through the fan coil unit 12 and the fresh air boost module 10, 100.
In this mode, the flow of fresh/outdoor air through the fresh air boost modules 10, 100 still induces a flow of air through the fan coil unit 12 and the fresh air boost modules 10, 100, thus increasing the total volume of air flow through the system and improving the operating efficiency of the system as compared to existing air conditioning systems.
In the eco mode of operation, fresh/outdoor air is provided to the second inlet 16 of the fresh air boost module 10, 100 and the coil 28 of the fan-coil unit 12 and the fan 26 are not operated. Also, even when the air conditioning function is not required, the flow of fresh/outdoor air through the fresh air boost module 10 in this mode still induces a flow of air through the fan coil unit 12 and the fresh air boost modules 10, 100.
Even when the air conditioning function is not required, the induction of the flow of air through the coils 28 of the fan-coil unit 12 may prevent dust from accumulating on the coils 28 and/or increase the ventilation rate of the room/system without the need to operate the fan 26 (and, for example, unnecessarily expend energy).

Claims (15)

1. A fresh air boost module for attachment to a fan coil unit for introducing air from an outdoor environment, wherein the fresh air boost module comprises:
a first inlet for connection to an outlet of the fan coil unit;
a second inlet for connection to an air handling unit;
an outlet for discharging the outdoor air and the conditioned air; and
a combined volume in communication with the first inlet, the second inlet, and the outlet;
wherein, in use, the flow of outdoor air from the second inlet through the combined volume to the outlet creates a pressure gradient that induces a flow of air from the fan coil unit through the first inlet and into the fresh air boost module.
2. The fresh air boost module of claim 1, wherein the fresh air boost module includes at least one nozzle fluidly connected to the second inlet for injecting the outdoor air into the combined volume.
3. The fresh air boost module of claim 2, wherein the fresh air boost module comprises: a first plenum connected to the second inlet and configured to supply outdoor air to a first set of one or more nozzles; and a second plenum connected to the second inlet and configured to supply outdoor air to a second set of one or more nozzles.
4. The fresh air boost module of claim 3, wherein the first boost chamber is located on a first inner side of the fresh air boost module; and the second plenum is located on a second inner side of the fresh air plenum module; wherein the first inner side and the second inner side are in facing spaced apart relation.
5. The fresh air boost module of claim 3 or claim 4, wherein the second inlet is configured to evenly distribute the flow of outdoor air from the air treatment unit between the first and second plenums.
6. The fresh air boost module of claim 3 or claim 4, wherein the fresh air boost module is configured to direct more than half of the flow of outdoor air from the air handling unit to the first boost chamber; or the fresh air boost module is configured to direct more than half of the outdoor air flow from the air handling unit to the second boost chamber.
7. The fresh air boost module of claim 3 or claim 4, wherein the volume of the first boost chamber is greater than the volume of the second boost chamber; or the volume of the second pumping chamber is greater than the volume of the first pumping chamber.
8. The fresh air boost module of claim 3, wherein the first set of nozzles includes more nozzles than the second set of nozzles; or wherein the second set of nozzles comprises more nozzles than the first set of nozzles.
9. A system comprising the fresh air boost module of any preceding claim and a fan coil unit, wherein the first inlet of the fresh air boost module is coupled to the outlet of the fan coil unit.
10. The system of claim 9, comprising an air handling unit, wherein the second inlet of the fresh air boost module is connected to the outlet of the air handling unit.
11. The system of claim 9 or claim 10, wherein the fan coil unit has a controller configured to independently operate the coils of the fan coil unit and the fans of the fan coil unit.
12. A method of installing a fresh air boost module or system according to any preceding claim, the method comprising: providing the fresh air boost module; fitting the first inlet of the fresh air boost module to the outlet of a fan coil unit; and connecting the second inlet of the fresh air boost module to the outlet of the air treatment system.
13. A method of operating the system of any one of claims 9 to 11, the method comprising operating the system in an induction mode, the induction mode comprising:
providing outdoor air to the second inlet of the fresh air boost module;
operating a coil of the fan coil unit; and
not operating a fan of the fan coil unit;
wherein the flow of conditioned air through the fan coil unit is induced by a pressure gradient created by the flow of outdoor air through the fresh air boost module.
14. The method of claim 13, the method comprising operating the system in an enhanced mode, the enhanced mode comprising:
providing outdoor air to the second inlet of the fresh air boost module;
operating the coils of the fan coil unit; and
operating the fan of the fan coil unit;
wherein a flow of conditioned air through the fan coil unit is provided by a pressure gradient created by the flow of outdoor air through the fresh air boost module and the operation of the fan.
15. The method of claim 13 or claim 14, the method comprising operating the system in an eco mode, the eco mode comprising:
providing outdoor air to the second inlet of the fresh air boost module;
not operating the coils of the fan coil unit; and
the fan of the fan coil unit is not operated;
wherein the pressure gradient created by the flow of outdoor air through the fresh air boost module induces a flow of air through the fan coil unit.
CN202310105629.1A 2022-02-14 2023-02-13 Fresh air boost module for fan coil units Pending CN116592421A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP22156617.7A EP4227587A1 (en) 2022-02-14 2022-02-14 Fresh air plenum module for a fan coil unit
EP22156617.7 2022-02-14

Publications (1)

Publication Number Publication Date
CN116592421A true CN116592421A (en) 2023-08-15

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ID=80928825

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310105629.1A Pending CN116592421A (en) 2022-02-14 2023-02-13 Fresh air boost module for fan coil units

Country Status (3)

Country Link
US (1) US20230258343A1 (en)
EP (1) EP4227587A1 (en)
CN (1) CN116592421A (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1198983B (en) * 1961-10-11 1965-08-19 Teves Kg Alfred Induction apparatus for high pressure air conditioning systems
US4657178A (en) * 1980-09-05 1987-04-14 Camp Dresser & Mckee Mixing box
US6213867B1 (en) * 2000-01-12 2001-04-10 Air Handling Engineering Ltd. Venturi type air distribution system
DE202007001429U1 (en) * 2007-01-22 2007-03-22 Ltg Aktiengesellschaft Heating, cooling and/or ventilating device for rooms in building has ventilation device connected directly and/or indirectly to wall apertures
DE102008007641B4 (en) * 2008-02-04 2022-08-11 Pluggit Gmbh Ventilation unit

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US20230258343A1 (en) 2023-08-17

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