Air terminal of an air treatment system bringing fresh air into a room

Abstract

Air terminal of an air treatment system bringing fresh air into a room This air terminal (100) comprises a diffuser (110) which opens directly onto the room (1) so as to diffuse the fresh air into the room, a body (120), which carries the diffuser and which is connectable to a duct (3) of the air treatment system so that the fresh air brought to the air terminal by the duct flows inside the body to the diffuser following a flow path, an ionizer (130), which includes an ion and / or free radical emitting part (131) forming part of a non-thermal plasma in the air, and a support (140), which is fixedly attached to the body and on which the ionizer is fixed so that the ion and / or free radical emitting part is located less than 30 cm, along the flow path, from at least one of the ion and / or free radical emitting parts. less part of the diffuser. Figure for abstract: Figure 1

Description

Title of the invention: Air terminal of an air treatment system bringing fresh air into a room

[0001] The present invention relates to an air terminal of an air treatment system bringing fresh air into a room.

[0002] In order to treat, in particular renew, the air in a building, a ventilation network is generally installed therein which makes it possible to bring fresh air to different rooms in the building, each equipped with an air terminal. Each air terminal comprises a body inside which the fresh air circulates from a duct of the ventilation network, opening inside the body, and a diffuser which is carried by the body and through which the air passes while being blown inside the room, the ventilation network being under overpressure. In practice, the body of the air terminal is in the form of either a plenum, which ensures the expansion of the air between the duct and the diffuser and which is generally equipped with a connection around which the duct is mounted, or a simple tubular conduit typically forming an air vent.

[0003] Indoor air quality in buildings is a health issue. Many indoor air purification technologies exist, each with different advantages and disadvantages.

[0004] One of these air purification technologies uses a non-thermal plasma, this technology being otherwise called bipolar ionization: this purification process allows, by applying a strong potential difference between two electrodes, to ionize the air, thus generating ions and free electrons. The latter will react with the air molecules to form free radicals, as well as positive and negative ions. The main advantage of this non-thermal plasma process lies in the fact that it is the free radicals and ions generated that ensure the decontamination of indoor air: in fact, the ions and free radicals make it possible to deactivate bacteria and viruses, such as that of Covid, and break down volatile organic compounds.We therefore understand that air pollution can be carried out in the room to be purified, when the ions and free radicals of the non-thermal plasma penetrate inside the room and react with the particles present in the air of the room.

[0005] Other air purification technologies exist, for example using particulate filters, adsorption filters, ultraviolet lamps or photocatalysis devices: the air purification action takes place when the air passes through the corresponding purification device, and not in the room whose air is to be treated.

[0006] A disadvantage of the technology using non-thermal plasma lies in the The fact that plasma ions and free radicals have a short lifetime, typically of the order of a few tens of seconds, due to the fact that free radicals and positive and negative ions are very unstable and will react with each other or with other molecules. Therefore, installing an ionizer in an air handling unit, from which one or more ducts emerge to connect as many air terminals, is only slightly effective since only a minimal fraction of the ions and free radicals generated at the air handling unit will actually reach the interior of the room to purify the air inside the latter.

[0007] The aim of the present invention is to remedy the drawbacks explained above, by proposing a simple and effective solution, improving the quality of the indoor air of a room.

[0008] To this end, the invention relates to an air terminal of an air treatment system bringing fresh air into a room, the air terminal comprising

[0009] - a diffuser which opens directly onto the room so as to diffuse fresh air in the room,

[0010] - a body, which carries the diffuser and which is connectable to a sheath of the system of air treatment so that the fresh air brought to the air terminal by the duct flows inside the body to the diffuser following a flow path,

[0011] - an ionizer which includes a part emitting ions and / or free radicals forming part of a non-thermal plasma in air, and

[0012] - a support, which is fixedly attached to the body and on which the ionizer is fixed such that the ion and / or free radical emitting part is located less than 30 cm, along the flow path, from at least one part of the diffuser

[0013] One of the ideas underlying the invention is to integrate an ionizer into the air terminal using a dedicated support that is fixed to the body of the terminal, in order to position the ionizer as close as possible to the diffuser of the terminal and therefore to the room to be treated. Thus, the quantity of ions and / or free radicals emitted by the ionizer and reaching the room is maximum, these ions and / or free radicals not having had time to react with each other or with other molecules during their journey between the ionizer and the diffuser. Positioning the ionizer as close as possible to the diffuser also makes it possible to optimize the diffusion of ions and / or free radicals throughout the air in the room, allowing the most uniform treatment possible of this air. This therefore makes it possible to improve the quality of treatment of the air in the room.In practice, the invention provides for placing the ionizer less than 30 cm, along the air flow path in the body of the terminal, from all or part of the diffuser: this makes it possible to have a sufficient quantity of ions and / or free radicals in the room to be treated. In addition, the ionizer can advantageously be placed so that it is close to an area where the speed . air flow in the terminal according to the invention is maximum, which makes it possible to optimize both the production of ions and / or free radicals by the ionizer and the flow of ions and / or free radicals from the ionizer, as well as the diffusion of the latter in the room. The invention thus makes it possible to increase by a significant factor, typically at least ten, the density of ions and / or free radicals present in the room compared to an installation where an ionizer would be installed at the level of an air treatment unit connected by ducts to standard air terminals.

[0014] According to additional advantageous characteristics of the air terminal according to the invention, taken in isolation or in all technically possible combinations:

[0015] - The body or support includes a tubular portion, which is substantially centered on an axis and which is adapted to be tightly surrounded by the sheath, and the ionizer is arranged inside or at a downstream axial end of said tubular part so that the ion and / or free radical emitting part is arranged substantially on the axis of said tubular part.

[0016] - Said tubular part belongs to the body and forms a tapping opening into a plenum of the body, the diffuser being carried by the plenum.

[0017] - Said tubular part belongs to the support and extends axially from a support plate, on which the ionizer is fixed and which is attached to a plenum of the body, the diffuser being carried by the plenum.

[0018] - Said tubular part belongs to the support and forms a tubular connection which is suitable for being inserted in a watertight manner between a body connection and the sheath.

[0019] - Said tubular part belongs to the body and forms a conduit inside which a tubular sleeve of the support is arranged in a sealed and substantially coaxial manner.

[0020] - The air terminal further comprises a detection device, which is adapted to detect that air is flowing inside the air terminal towards the diffuser and to emit a corresponding detection signal, and which controls the ionizer according to the detection signal.

[0021] - The detection device includes a pressure switch which measures the difference in pressure between the inside of the air terminal and the room.

[0022] - The air terminal includes an operating indicator which is adapted for emit a light signal, visible in the room, depending on the operating status of the ionizer.

[0023] - The operating indicator comprises at least one LED which is arranged on the face of the diffuser, facing the room.

[0024] The invention will be better understood upon reading the following description, given solely by way of example and made with reference to the drawings in which: - [Fig.l] [Fig.l] is a schematic longitudinal section of a first embodiment of an air terminal according to the invention; - [Fig.2] [Fig.2] is a schematic section along line II-II of [Fig.l]; - [Fig.3] [Fig.3] is a view similar to [Fig.l], illustrating a second embodiment of an air terminal according to the invention; - [Fig.4] [Fig.4] is a schematic section along line IV-IV of [Fig.3] - [Fig.5] [Fig.5] is a view similar to [Fig.l] illustrating a third mode of producing an air terminal in accordance with the invention; and - [Fig.6] [Fig.6] is a view similar to [Fig.l], illustrating a fourth embodiment of an air terminal according to the invention.

[0025] In Figures 1 and 2, an air terminal 100 is shown, more simply called “terminal” hereinafter. The terminal 100 equips a room 1, typically a room of a building, and makes it possible to treat, in particular to renew, the air of the room 1. The terminal 100 belongs for this purpose to an air treatment system, in particular a ventilation network, which brings fresh air into the room 1 and whose air exchanges with the interior of the room 1 are carried out at the level of the terminal 100. In practice, the terminal 100 is arranged in the room 1, typically in the ceiling 2 of the room 1 or in a false ceiling of the room 1. The nature of the room 1 is not limiting, this room being able to be a living room as well as a room of a tertiary building, that is to say a building which receives the public and / or which is the place of tertiary activities.

[0026] As clearly visible in Figures 1 and 2, the terminal 100 comprises four main components which are a diffuser 110, a body 120, an ionizer 130 and a support 140, which will be detailed successively below.

[0027] The diffuser 110 comprises a plate 111, typically rigid, made of a metallic and / or plastic material. On each of the two main sides of the plate 111, the latter has a flat face 112, respectively 113. These two flat faces 112 and 113 are thus opposite each other along the thickness direction of the plate 111 and correspond respectively to an inner face, which is turned towards the body 120, and an outer face.

[0028] In practice, the plate 111 is perforated by through passages, which are not shown in detail in the figures and which connect the inner 112 and outer 113 faces to each other. These through passages allow the air to pass through the plate 111, being deflected in order to better distribute the air thus diffused. When the terminal 100 is supplied with fresh air, the air passes through the plate 111 from the inner face 112 to the outer face 113 via the aforementioned through passages which deflect the air flows circulating therein so as to distribute the air intake cor- respondent in substantially all of room 1.

[0029] The body 120 carries the diffuser 110, as detailed below, and is also provided to be hollow so that air can flow therein. The body 120 is typically rigid, made of a metallic and / or plastic material. In the embodiment of FIGS. 1 and 2, the body 120 comprises for this purpose a plenum 121, for example parallelepipedal, and a tapping 122, which opens into the interior of the plenum.

[0030] The plenum 121 provides a function of releasing the air which enters it from the tapping 122, before this air reaches the diffuser 110 carried by the plenum 121.

[0031] The tapping 122 constitutes a tubular part, which is centered on an axis X122 and which is adapted to be tightly surrounded by a sheath 3 belonging to the aforementioned air treatment system, the specific features of this sheath 3 not being limiting. Thus, in the functional state of the air treatment system, the sheath 3 is fixedly attached around the tapping 122, all around the axis XI22, and ensures a sealed continuity between the interior of the sheath and the interior of the tapping 122 so that fresh air brought by the sheath 3 flows inside the tapping 122, as indicated by the wavy arrows in the figures. In practice, the specific features relating to the fixing of the sheath 3 on the tapping 122 are not limiting and are well known in the field.

[0032] When the body 120 is connected to the duct 3 at the level of the connection 122, fresh air brought by the duct 3 to the terminal 100 flows inside the body 120, here inside the connection 122 then the plenum 121, to the diffuser 110, the air thus flowing inside the body 120 following a flow path which is defined by the body 120, as indicated by the wavy arrows in the figures.

[0033] The ionizer 130 makes it possible to generate a non-thermal plasma, comprising in particular free radicals and / or ions, positive and negative, these ions and / or free radicals being emitted by an ion and / or free radical emitting part 131 of the ionizer 130. In practice, the ionizer 130 is a device known per se, so that, in the figures, it is only represented very schematically. The ionizer 130 can also be called a bipolar ionization device. By way of non-limiting example, the ion and / or free radical emitting part 131 comprises two electrodes between which a high potential difference is applied in order to ionize the air between the two electrodes, the ions and / or free radicals emitted being entrainable by the air flowing between the electrodes.Of course, the specificities of the ionizer 130 are not limiting since its ion and / or free radical emitting part 131 is capable of forming a non-thermal plasma, generating free radicals and / or ions, in particular positive and negative.

[0034] In practice, the ionizer 130 is to be supplied with electricity and, for this purpose, the terminal 100 comprises a power supply circuit 150, indicated schematically in dotted lines on [Fig.l]. Where appropriate, the power supply circuit 150 incorporates an electrical voltage transformer.

[0035] The support 140 here comprises a bar 141. The bar 141 is fixedly attached to the body 120, advantageously being arranged transversely to the axis X122 of the connection 122. In practice, the bar 141 is fixed to the plenum 121 and / or the connection 122 by any suitable fixing means. In addition, the bar 141 supports the ionizer 130, the latter being fixed to the bar 141 in such a way that its ion and / or free radical emitting part 131 is located less than 30 cm from the diffuser 110 along the aforementioned flow path. In practice, the spacing, along the flow path, between the ion and / or free radical emitting part 131 and the diffuser 110 may not be constant depending on the region of the diffuser 110 considered: the maximum spacing of 30 cm is to be assessed between the ion and / or free radical emitting part 131 and at least one part of the diffuser 110.In other words, it is conceivable that only a part of the diffuser 110 is located less than 30 cm, along the flow path, from the ion and / or free radical emitting part 131; of course, it is also possible that the entire diffuser 110 is arranged less than 30 cm, along the flow path, from the ion and / or free radical emitting part 131.

[0036] Advantageously, as in the embodiment considered in Figures 1 and 2, the bar 141 supports the ionizer 130 in such a way that the ionizer 130 is arranged at the downstream axial end of the tapping 122 and that the ion and / or free radical emitting part 131 is located on the axis X122 of the tapping 122. In this way, the ion and / or free radical emitting part 131 is located in the central region of the air flow leaving the tapping 122, that is to say where the speed of the air flow is the highest.

[0037] According to a particularly advantageous optional arrangement, the terminal 100 also comprises a detection device 160 which, in the embodiment considered in FIGS. 1 and 2, comprises a pressure switch 161. The pressure switch 161 is adapted to measure a pressure difference between the interior of the terminal 100, here the interior of the tapping 122, and the room 1. For this purpose, the pressure switch 161 comprises for example a pressure tube 162 opening into the tapping 122 and a pressure tube 163 opening into the room 1.The pressure switch 161 integrates or is associated with a controller, which processes the signals emitted by the pressure switch 161 and which, as a function of the latter, controls the ionizer 130, more precisely the electrical supply of the latter by the supply circuit 150: in particular, when the pressure difference measured by the pressure switch 161 is not zero, the aforementioned computer closes the supply circuit 150, which supplies electricity to the ionizer 130 and therefore activates the ion and / or free radical emitting part 131; when the pressure difference is zero, the aforementioned controller opens the supply circuit 150, which switches off. the ionizer 130.

[0038] In the embodiment envisaged in Figures 1 and 2, the pressure switch 161 is carried by the body 120, in particular the plenum 121, but other arrangements are possible.

[0039] Of course, other embodiments than the pressure switch 161 detailed above are conceivable for the detection device 160, provided that this detection device 160 makes it possible both to detect that air is flowing inside the terminal 100 towards the diffuser 110, by emitting a corresponding detection signal, and to control the ionizer 130 as a function of the aforementioned detection signal. In this way, the detection device 160, whatever its embodiment, makes it possible to cut off the emission of ions and / or free radicals by the ionizer 130 when the air treatment system is stopped.

[0040] According to another optional arrangement, which is also very advantageous and which can be combined with the above, the terminal 100 includes an operating indicator 170, shown very schematically in the figures. This operating indicator 170 makes it possible to emit a light signal, which is visible in the room 1, depending on the operating state of the ionizer 130: the light signal emitted by the operating indicator 170 when the ionizer 130 is operating is different from that emitted by the operating indicator 170 when the ionizer is stopped, it being understood that, in the latter case, the signal may correspond to the absence of any light emission.According to a practical and economical embodiment, the operating indicator 170 comprises one or more LEDs: in the example illustrated in Figures 1 and 2, the operating indicator 170 thus comprises an LED 171 which lights up when the ionizer is running and which goes out when the ionizer is stopped, the LED 171 being able to be integrated in series in the power supply circuit 150. According to an alternative variant not shown, the operating indicator 170 comprises two separate LEDs, namely a first LED lighting up only when the ionizer is running and a second LED lighting up only when the ionizer is stopped, these two LEDs being able to have different colors. In all cases, this or these LEDs, such as the LED 171, are advantageously arranged on the outer face 113 of the diffuser 110: in this way, the visibility of the operating indicator 170 is improved.

[0041] An example of operation of the terminal 100 is as follows.

[0042] It is considered that the air treatment system is in operation and that fresh air is brought to the terminal 100 by the duct 3, as indicated by the wavy arrows in the figures. This fresh air enters the terminal 100 through the tapping 122, being advantageously detected by the detection device 160, which activates the ionizer 130. In all cases, the ionizer 130 ionizes the air flowing through it, emitting ions and / or free radicals from its ion and / or free radical emitting part 131. These ions and / or free radicals are carried by the air flow inside the plenum 121 to the diffuser 110, before passing through the latter to reach the room 1. Given the short distance of the ion emitting part 131 from at least one part of the diffuser 110, namely less than 30 cm as explained above, the quantity of ions and / or free radicals reaching the room 1 is substantial, in particular because the ions and / or free radicals emitted by the ionizer 130 do not have time to recombine.

[0043] In Figures 3 and 4 a terminal 200 is shown as an alternative embodiment to terminal 100.

[0044] The terminal 200 comprises a diffuser 210, a body 220, an ionizer 230, a support 240, a power supply circuit 250 and a detection device 260, which are respectively functionally similar to the diffuser 110, the body 120, the ionizer 130, the support 140, the power supply circuit 150 and the detection device 160 of the terminal 100. Here, the diffuser 210, the ionizer 230, the power supply circuit 250 and the detection device 160 are structurally identical to, respectively, the diffuser 110, the ionizer 130, the power supply circuit 150 and the detection device 160.

[0045] The terminal 200 is distinguished from the terminal 100 by its body 220 and its support 240.

[0046] More precisely, the body 220 comprises a plenum 221, which is similar to the plenum 121 of the terminal 100 but which is devoid of a connection, such as the connection 122. In addition, the support 240 comprises a plate 241 and a tubular part 242 centered on an axis X242. The tubular part 242 extends axially from the plate 241 and can be tightly encircled by the sheath 3 in a manner similar to the tight mounting of the sheath 3 on the connection 122 of the plenum 100. The plate 241 is designed to be fixedly attached to the body 220, here advantageously removable from the plenum 221. The ionizer 230 is fixed to the plate 241 so that the ionizer 230 is arranged at the downstream axial end of the tubular part 142 and its ion and / or free radical emitting part 231 is arranged on the axis X242 of the tubular part 242.

[0047] The detection device 260 and / or the power supply circuit 250 are advantageously carried by the plate 241.

[0048] The operation of terminal 200 is similar to that of terminal 100.

[0049] In [Fig. 5] a terminal 300 is shown as an alternative embodiment to terminal 100.

[0050] The terminal 300 comprises a diffuser 310, a body 320, an ionizer 330, a support 340 and a detection device 360, which are respectively similar, from a functional point of view, to the diffuser 110, the body 120, the ionizer 130, the support 140 and to the detection device 160 of the terminal 100.

[0051] Here, the diffuser 310, the body 320, the ionizer 330 and the detection device 160 are structurally identical to, respectively, the diffuser 110, the body 120, the ionizer 130 and the detection device 160. Thus, the body 320 comprises a plenum 321 and a tapping 322, which are similar to the plenum 121 and the tapping 122 of the body 120.

[0052] The terminal 300 is distinguished from the terminal 100 by its support 340 which forms a tubular connection 341, centered on axis X341. This tubular connection 341 is designed to be interposed in a sealed manner, and thus connected together, the tapping 322 of the body and the sheath 3. For this purpose, the tubular connection 341 is, at its downstream axial end, mounted in a sealed manner on the tapping 322, in particular by surrounding the tapping 322, and is, at its upstream end, capable of being surrounded in a sealed manner by the sheath 3.

[0053] In addition, the support 340 is advantageously designed to support the ionizer 330 so as to position the latter inside the tubular connection 341, by substantially aligning its ion and / or free radical emitting part 331 on the axis X341. For this purpose, the support 340 includes a bar, a plate or any similar arrangement, not shown in [Fig. 5], which extends from the inner face of the tubular connection 341, in particular transversely to the axis X341.

[0054] In the embodiment envisaged in [Fig.5], the detection device 360 ​​is carried by the tubular connection 341.

[0055] The operation of terminal 300 is similar to that of terminal 100.

[0056] In [Fig. 6] a terminal 400 is shown as an alternative embodiment to terminal 100.

[0057] The terminal 400 comprises a diffuser 410, a body 420, an ionizer 430 and a support 440, which are respectively functionally similar to the diffuser 110, the body 120, the ionizer 130 and the support 140 of the terminal 100.

[0058] Here, the diffuser 410 and the ionizer 430 are structurally identical to, respectively, the diffuser 110 and the ionizer 130.

[0059] The terminal 400 is distinguished from the terminal 100 by its body 420 and its support 440.

[0060] More specifically, the body 420 comprises a tubular conduit 421, which is centered on an axis X421 and which, at its downstream axial end, carries the diffuser 410 while, at its upstream axial end, the tubular conduit 421 is directly connectable to the duct 3, in particular being able to be sealed by the latter. Thus, the body 420 does not include a plenum and is similar to what is commonly called an “insufflation vent” in the field.

[0061] The support 440 comprises a tubular sleeve 441 which is arranged coaxially in the tubular conduit 421 of the body 420. The sealing of this arrangement is ensured by a seal 422, typically an O-ring, which is radially interposed between the inner face of the tubular conduit 421 and the outer face of the tubular sleeve 441, thus allowing the air flowing into the body 420 to pass exclusively through the interior of the tubular sleeve 441.

[0062] In addition, the support 440 is advantageously designed to support the ionizer 430 so as to position the latter inside the sleeve 441, by substantially aligning its ion and / or free radical emitting part 431 on the axis X441. For this purpose, the support 440 includes a bar, a plate or any similar arrangement, not shown in [Fig. 6], which extends from the inner face of the sleeve 441, in particular transversely to the axis X441.

[0063] The operation of terminal 400 is similar to that of terminal 100, except that it is operated without implementing a detection device such as detection device 160.

[0064] The various embodiments described above illustrate the multiplicity of embodiments that the invention can take. In all embodiments, the support 140, 240, 340 or 440 makes it possible, in a simple and effective manner, to integrate the ionizer 130, 230, 330 or 430 into the terminal 100, 200, 300 or 400 by placing the latter less than 30 cm, along the air flow path in the body 120, 220, 320 or 420, from all or part of the diffuser 110, 210, 310, 410.

[0065] Finally, various arrangements and variants to the terminals 100, 200, 300 and 400 described so far are also conceivable. For example, the specific features of the four embodiments described so far can be at least partially combined with each other to generate new embodiments.

Claims

Claims

1. Air terminal (100; 200; 300) of an air treatment system bringing fresh air into a room (1), the air terminal comprising: - a diffuser (110; 210; 310) which opens directly onto the room (1) so as to diffuse the fresh air into the room, - a body (120; 220; 320), which carries the diffuser and which is connectable to a duct (3) of the air treatment system so that the fresh air brought to the air terminal by the duct flows inside the body to the diffuser following a flow path, - an ionizer (130; 230; 330), which includes an ion and / or free radical emitting part (131; 231; 331) forming part of a non-thermal plasma in the air, and - a support (140; 240;340), which is fixedly attached to the body and to which the ionizer is fixed such that the ion and / or free radical emitting part is located less than 30 cm, along the flow path, from at least one part of the diffuser; wherein the air terminal (100; 200; 300) further comprises a detection device (160; 260; 360), which is adapted to detect that air is flowing inside the air terminal towards the diffuser (110; 210; 310) and to emit a corresponding detection signal, and which controls the ionizer (130; 230; 330) as a function of the detection signal.;

2. Air terminal according to claim 1, in which the body (120) or the support (240; 340) includes a tubular part (122; 242; 341), which is substantially centered on an axis (X122; X242; X341) and which is adapted to be tightly surrounded by the sheath (3), and in which the ionizer (130; 230; 330) is arranged inside or at a downstream axial end of said tubular part so that the ion and / or free radical emitting part (131; 231; 331) is arranged substantially on the axis of said tubular part.

3. Air terminal according to claim 2, in which said tubular part belongs to the body (120) and forms a tapping (122) opening into a plenum (121) of the body, the diffuser (110) being carried by the plenum.

4. An air terminal according to claim 2, wherein said part tubular (242) belongs to the support (240) and extends axially from a plate (241) of the support, on which the ionizer (230) is fixed and which is attached to a plenum (221) of the body (220), the diffuser (210) being carried by the plenum.

5. Air terminal according to claim 2, in which said tubular part (341) belongs to the support (340) and forms a tubular connection which is adapted to be inserted in a sealed manner between a tapping (322) of the body (320) and the sheath (3).

6. Air terminal according to claim 2, in which said tubular part belongs to the body and forms a conduit inside which a tubular sleeve of the support is arranged in a sealed and substantially coaxial manner.

7. Air terminal according to any one of the preceding claims, in which the detection device (160; 260; 360) comprises a pressure switch (161) which measures the pressure difference between the interior of the air terminal (100; 200; 300) and the room (1).

8. Air terminal according to any one of the preceding claims, in which the air terminal (100) comprises an operating indicator (170) which is adapted to emit a light signal, visible in the room (1), depending on the operating state of the ionizer (130).

9. Air terminal according to claim 8, in which the operating indicator (170) comprises at least one LED (171) which is arranged on the face (113) of the diffuser (110), facing the room (1).

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