Insect repellent device for sales counter

Abstract

Sales counter with insect repellent device, the counter (2, 2') comprising: a base body (4, 4') with a display surface (10, 10') and an adjoining work surface (12, 12') for personnel, a front panel unit (9, 9') attached to the base body (4, 4') for separating the display area (10, 10') from a customer side (K) of the counter (2, 2'), the insect repellent device comprises: a control unit (40), an air guidance system arranged on the base body (4, 4') with at least one outlet opening (18a-g, 18') in an area above the display surface (10, 10') and / or work surface (12, 12'), and at least one blower unit (38) for conveying air in the air guidance system to the at least one outlet opening (18a-g, 18'), wherein the at least one outlet opening (18a-g, 18') is designed to generate an air curtain (22, 22') which extends from the at least one outlet opening (18ag, 18') to the work surface (12, 12'), and the air curtain (22, 22') forms a barrier between the display surface (10, 10') and an area surrounding the counter (2, 2').

Description

[0001] The invention relates to a sales counter with insect repellent device, an insect repellent device as a retrofit kit for sales counters and a concept for wasp repellent.

[0002] Insects such as flies, bees, mosquitoes, and wasps are unpleasant for sales staff and customers and can even be dangerous for those with allergies. For example, wasps are particularly attracted to sweets in bakery counters. Traps can be set to protect sales staff, customers, and food, as shown in EP 0 813 359 B1, for example. In WO 2022 / 173286 A1, wasps are sprayed with an aerosol of water droplets to repel them.

[0003] The object of the invention is to provide an efficient insect repellent device for sales counters, a sales counter with such a repellent device and a wasp repellent concept for a sales room.

[0004] This problem is solved by the features of claims 1, 16 and 17 respectively.

[0005] Advantageous embodiments are the subject of subclaims.

[0006] According to claim 1, a sales counter or service counter is provided with an insect repellent device. The repellent device can prevent flying insects such as wasps, flies, mosquitoes, etc., from reaching the products displayed in the sales counter.

[0007] The sales counter comprises a base body with a display area for products to be sold and an adjacent work surface for staff. For example, a (continuous) counter or worktop is arranged on the top of the base body, providing the display and work surfaces. Alternatively, the display and work surfaces can be provided by different panels, for example, the display and work surfaces are arranged at different levels or different heights. A front panel assembly is arranged or attached to the base body of the counter to shield or separate the display area (and the products displayed on it) from the customer side of the counter.

[0008] The insect repellent device comprises a control unit and an air guidance system arranged on the base body with at least one outlet opening in an area above the display area and / or work surface. In particular, the outlet opening is arranged above or above and spaced from the display area and / or work surface, so that access to the display area for staff is not or hardly obstructed. The repellent device further comprises at least one blower unit (controlled by the control unit) for conveying air in the air guidance system to the at least one outlet opening. The display area faces a customer side or the front of the counter, and the work surface faces a staff side or the rear of the counter.The at least one outlet opening is designed to direct air flowing from the outlet opening toward the work surface and to create an air curtain extending from the at least one outlet opening toward the work surface, thus forming a barrier between the display area and the surroundings of the counter. This means that the air curtain separates the display area from the surroundings.

[0009] The air flow or air curtain forms a barrier for flying insects, disturbing or hindering them from flying into the product display or onto the display area. The air curtain or air curtain created by the air flow separates or shields the display area (and thus the products) from the surroundings in a way that is animal-friendly, without hindering access to the display area for operating personnel. In addition, the air curtain forms a barrier for fragrances emitted by products on the display area, preventing them from escaping and thus attracting fewer insects, especially wasps.

[0010] Preferably, the outlet opening has a nozzle element or the outlet opening is designed as a nozzle, so that air flowing from the outlet opening is directed toward the work surface and / or an air curtain is created between the outlet opening and the work surface, separating the display area and the work surface from each other. For example, the nozzle element is replaceable and / or adjustable to provide different outflow angles from the outlet opening toward the work surface as needed.

[0011] Preferably, the at least one outlet opening and / or the nozzle element is designed to discharge air at an angle of inclination between 30°-70° to the vertical, preferably between 45°-60°, such that an air curtain inclined to the vertical can be created, which runs diagonally from the outlet opening towards the work surface. The air curtain forms a cross-sectional profile that forms an inner boundary or barrier to the display area and an outer boundary or barrier to the staff side. The angle of inclination refers to an average or mean propagation direction of the air curtain between the inner and outer boundaries. Due to the diagonal air flow or the diagonal air curtain, insects are more likely to be guided or blown away from the display area.

[0012] According to one embodiment, the at least one outlet opening and / or the nozzle element has an outlet angle that lies between 30°-90°, preferably 40°-80°, particularly preferably 45°-70°. The outlet angle determines the radiation angle of the air curtain, i.e., the angle enclosed by the inner and outer barrier or boundary of the air curtain. The larger the outlet angle, the larger the radiation angle and the wider the air curtain or air barrier. The wider the air curtain or barrier, the more effective the defense against flying insects. Preferably, the outer boundary of the air curtain runs horizontally or nearly horizontally.Since the inner boundary of the air curtain, which runs from the outlet opening to the work surface, is essentially unchangeable, the almost horizontal outer boundary of the air curtain also provides a width of the air curtain in the area close to the outlet opening that enables effective insect protection.

[0013] According to one embodiment, the air guidance system is at least partially integrated into the base body, in particular into at least one beam or frame unit that at least partially protrudes beyond the display area and / or the work surface or is arranged above the display area and / or the work surface. This integration allows the air guidance system to be mounted on the counter in a space-saving and unobtrusive manner. For example, part of the air guidance system runs in one or more (hollow) beams of the counter, for example by installing air ducts in the beam or by using the beam itself as an air duct or conduit.

[0014] Preferably, the air guidance system connects to the front panel unit at least in the region of the at least one outlet opening, in particular in a connection area lying horizontally above the display area and / or work surface. In other words, the air guidance system connects seamlessly to the front panel unit. The front panel unit can have a vertical and an adjoining horizontal panel (storage area), wherein the air guidance system preferably connects to the horizontal panel. According to one embodiment, the air guidance system has an outlet pipe running horizontally above the display area with the at least one outlet opening, wherein the outlet pipe connects to the front panel unit and / or there is no opening between the front panel unit and the outlet pipe. A pipe can have a round or rectangular (e.g.Square cross-sections are recommended, with a rectangular cross-section simplifying connection to the windscreen unit and other elements. The diameter or largest cross-section of the outlet pipe can be between 3 cm and 8 cm, preferably between 4 cm and 6 cm. The small cross-sections ensure that access to the products on the display area is not obstructed.

[0015] Preferably, the at least one outlet opening is arranged on a side of the air duct system or outlet pipe facing the staff side. This means that the outlet opening is arranged laterally, so that the air must be deflected downwards in order to flow from the outlet opening to the work surface. Since the side opening is visible and easily accessible to staff, the outlet opening can be easily cleaned. In addition, the side opening prevents any condensate from dripping directly from the opening onto the display / work surface. Alternatively, the at least one outlet opening is arranged on an underside of the air duct system or outlet pipe.

[0016] In order that the entire length of the display area can be shielded, the at least one outlet opening and / or a plurality of outlet openings are designed such that an air flow or an air curtain can be generated towards the work surface over the entire length or substantially the entire length of the display area. In this way, the space between the front window unit of the counter and the outflowing air (air curtain) is shielded against insects. For example, the repellent device has a single outlet opening that extends over the entire or substantially the entire length of the display area. Alternatively, two or more outlet openings spaced apart from one another are provided. For example, a plurality of outlet openings with a length between 10 cm and 25 cm, preferably between 10 cm and 15 cm, a width between 3 cm and 6 cm, preferably between 4 cm and 5 cm, and a distance between adjacent outlet openings between 5 cm and 8 cm.The direction of the length of the display area or counter and outlet opening refers to the direction that is perpendicular to the width of the counter between the front and back of the counter.

[0017] According to a further embodiment, the counter has at least one side window and / or side panel, so that the display area between the customer side and the staff side is also shielded laterally. In this way, the display area, together with the air curtain and front window unit, is completely shielded from the outside.

[0018] According to one embodiment, a door unit is arranged between the display area and the work surface to separate the display area from the work surface. This provides additional mechanical insect protection. For example, the door unit is constructed from sliding doors, in particular sliding glass doors, rolling doors, or folding doors.

[0019] The control unit can be used to control the rotational speed and thus the flow velocity and the amount of air delivered by the at least one blower unit; preferably, the flow velocity or rotational speed is continuously adjustable. For example, the blower unit can provide flow velocities of 4 m / s - 11 m / s, preferably between 6 m / s - 10 m / s, and particularly preferably at least 8 m / s. The blower unit(s) is / are preferably designed as a roller fan in order to be able to be installed in the air duct system or outlet pipe in a space-saving manner. Alternatively, the at least one blower unit is arranged or integrated in the base body, so the size of the blower unit is not limited by the diameter of the air duct system or outlet pipe.

[0020] According to a preferred embodiment, the control unit is designed to automatically deactivate the at least one blower unit when the door unit is closed (closed position) and to activate it when the door unit is open (open position). This means that the blower unit(s) are only active when goods are removed from the display area. In this way, energy-efficient insect repellent is provided consisting of the door(s) and air curtain when goods are removed. The goods are protected from insects at all times. For example, the repellent device has a switching element connected to the control unit for the at least one blower unit, wherein the switching element (e.g. limit switch) can be activated by closing and / or opening the door unit and, as described above, deactivates (closed position) or activates (open position) the blower unit.

[0021] The defense device preferably has at least one air treatment unit for pretreating the air conveyed by the blower unit, so that the air conveyed by the at least one blower unit can be cleaned, disinfected, and / or ionized. Additionally, an additive, such as water, water droplets, water vapor, and / or fragrances, can be added to the conveyed air at least temporarily by means of the air treatment unit, so that an aerosol is used to form the air curtain. For example, an additive can be added as needed and / or at predetermined time intervals.

[0022] According to one embodiment, the defense device has a heating and / or cooling device, so that the temperature of the air conveyed by the blower unit can be adjusted by means of the control unit.

[0023] According to an alternative embodiment, an insect repellent device as described above, in particular against wasps, is provided as a kit for retrofitting a sales counter. As described above, the insect repellent device comprises a control unit and an air guidance system with at least one outlet opening. The air guidance system, when used, can be arranged on a base body of a sales counter as described above, so that the at least one outlet opening is located in an area above a product display area of the counter and / or a work surface of the counter.Furthermore, at least one blower unit as described above for conveying air in the air duct system to the at least one outlet opening, wherein the at least one outlet opening is designed to create an air curtain extending from the at least one outlet opening to the work surface, so that, as described above, the air curtain forms a barrier that separates the display area from the environment. The preferred embodiments described above regarding the defense device are also applicable to the retrofit kit.

[0024] According to a further embodiment, a wasp repellent concept or wasp repellent arrangement for a sales room is provided, wherein the concept or arrangement comprises: at least one wasp nest dummy to be arranged in an outdoor area in front of the sales room, preferably in the area of an access door or access opening(s), such as doors, windows, passages into the sales room. Furthermore, at least one wasp live trap to be arranged within the sales room, and at least one sales counter with an insect repellent device as described above. With this arrangement, a maximum number of wasps are deterred and intercepted in an animal-friendly manner before they even enter the sales room, and the insect repellent device of the counter prevents any remaining wasps from reaching the displayed products, in particular food.

[0025] Embodiments of the invention are explained in more detail with reference to the figures. They show: Fig. 1 is a schematic, not to scale, cross-sectional view of a sales counter with insect repellent device according to a first embodiment, Fig. 2a a sales counter with an insect repellent device in perspective view according to a second embodiment, Fig. 2b a side view of the sales counter of Fig. 2a from the personnel side, Fig. 2c a detailed view of the sales counter of Fig. 2a in an area of air outlet openings of the insect repellent device, Fig. 3a a cross-sectional view of the sales counter of Fig. 2a, Fig. 3b a detailed view of Fig. 3a in an air outlet area of the insect repellent device, and Fig. 4 a schematic, not to scale sketch of a wasp repellent concept for a sales room with a counter with insect repellent device.

[0026] Fig. Figure 1 shows a schematic, not-to-scale cross-sectional view of a sales counter 2' with an insect repellent device according to a first embodiment. The sales counter 2' can be designed, for example, as a bakery counter, pastry counter, butcher's counter, hot food counter, refrigerated counter, ice cream counter, etc. In any case, the insect repellent device described below prevents flying insects such as wasps, flies, etc., from reaching the products (e.g., food) displayed in the counter 2'.

[0027] The sales counter 2' has a base body 4' or carcass, a front panel unit 9', which is attached to the base body 4' on the customer side K, and a counter top 36', which rests on the base body 4'. The surface of the counter top 36' is divided into two areas, a display area 10' for offered products and a work surface 12' for service personnel on a personnel side P of the counter 2'. The length of the counter 2' refers to the dimension of the counter in the y-direction of the specified coordinate system, the width of the counter to the dimension of the counter 2' in the x-direction, and the height of the counter 2' to the dimension of the counter 2' in the z-direction.

[0028] The insect repellent device comprises a control unit 40, an air guidance system, and a blower unit 38 for conveying air in the air guidance system or its air ducts. The air guidance system has at least one air outlet opening 18' located in an area above the countertop 36' or the display area 10' or work surface 12'. For example, a duct 16' with the outlet opening(s) 18' is provided above the display area 10'. The outlet opening(s) 18' is / are designed such that the air conveyed by the blower unit 38 creates an air curtain 22' extending from the at least one outlet opening 18' to the work surface 12', so that the display area 10' and work surface 12' are separated from each other by the air curtain 22'.

[0029] As shown in the cross-sectional view, the air curtain 22' forms a profile (in the xz plane) that forms an inner boundary or barrier 23a to the display area 10' and an outer boundary or barrier 23b to the staff side P. The at least one outlet opening 18' (or an optional outlet nozzle) is designed to discharge air at an inclination angle between 30° - 70° to the vertical, preferably between 45° - 60°, so that an air curtain 22' can be generated that runs obliquely from the outlet opening 18' toward the work surface 12'. The inclination angle refers to an averaged or mean propagation direction of the air curtain 22' between the inner and outer boundaries 23a-b.

[0030] An outlet angle w of at least one outlet opening 18' or an outlet nozzle 19 ( Fig. 3b) determines the angle of radiation of the air curtain 22', ie the angle enclosed by the two barriers or boundaries 23a-b of the air curtain 22'. The larger the outlet angle w, the larger the angle of radiation of the air curtain. The larger the angle of radiation or the wider the air curtain 22', the more effective the defense against flying insects. As exemplified in Fig. 1, the outlet angle w is set such that the outer boundary 23b runs horizontally or almost horizontally. Since the inner boundary 23a of the air curtain 22', which runs from the outlet opening 18' to the working surface 12', is essentially unchangeable, the almost horizontal outer boundary 23b of the air curtain 22' also provides a width of the air curtain 22' in the area near the outlet opening 18', which enables effective insect protection.

[0031] The outlet openings 18' are designed or arranged such that the generated air curtain 22' covers the entire length (y-direction) of the counter 2' or the display area 10'. The length of the counter 2' refers to the direction perpendicular to the Fig. 1. The width (x-direction) of the counter 2' refers to the dimension of the counter shown in the cross-section between the customer side K and the staff side P.

[0032] The air curtain 22' hinders or disrupts flying insects attempting to fly into the protected space R above the display area 10' or to the products, so that the air curtain 22' represents an impenetrable or substantially impenetrable barrier for flying insects. Thus, the space R behind the air curtain 22', i.e., the display area of the counter, is protected. In addition, the air curtain 22' prevents or reduces the escape of fragrances or odors, for example, produced by food, from the protected space R, which would attract insects.

[0033] The blower unit 38 is arranged here, for example, in the base body 4'. For clarity, additional air / pipe lines to or from pipe 16' are not shown. Alternatively, one or more blower units can be arranged in pipe 16', e.g., one or more roller fans.

[0034] The insect repellent device with control unit 40, air guidance system and blower unit(s) 38 can be provided as a kit for retrofitting an existing counter.

[0035] Fig. 2a-c and Fig. 3a-b show various views of a sales counter 2 with an insect repellent device according to a second embodiment. Unless otherwise noted, the above-mentioned features of the counter 2' correspond to those of the counter 2 described below, and the various described embodiments can also be used for the counter 2' described above. Identical features are identified by the same reference numerals.

[0036] In the perspective view of Fig. 2a and the rear view of Fig. 2b is the back of counter 2 from staff side P ( Fig. 3a) is shown. Fig. 2c shows a detail of the defense device, Fig. 3a a cross section of the counter 2 and Fig. 3b a detail of the cross section of Fig. 3a.

[0037] As described above, the sales counter 2 comprises a base body 4 or carcass, on the upper side of which a counter top 36 or worktop rests or is attached. The counter top 36 is divided into two areas: a first area facing the customer side K with a display area 10 for products, and a second area facing the staff side P with a work surface 12 for operating personnel.

[0038] The counter 2 further comprises a front panel unit 9 fastened to the base body 4 with a vertical front panel 6 and a horizontal front panel 8 fastened thereto.

[0039] In this embodiment, the base body 4 has lateral beams 14a-b, which, as in Fig. 2a-b are arranged on the right and left sides of the counter 2. The beams 14a-b form a support or stop for the front panel unit.

[0040] The insect repellent device comprises an air guidance system with a pipe 16 arranged above and spaced from the display surface 10. The pipe 16 has a plurality of adjacent outlet openings 18a-g ( Fig. 2c). Air is conveyed in the air duct system to the outlet openings 18a-g via one or more blower units (not shown). For example, one or more roller fans can be arranged in the duct 16.

[0041] Air supply lines to the duct 16 and electrical supply lines can be routed or laid in the beams 14a-b to save space. Optionally, the hollow beams 14ab themselves can be used as air ducts. The duct 16 is connected to the beams 14a-b via a connecting element 26. A lighting rail 28 ( Fig. 3b) is attached to an opposite side of the connecting element 26.

[0042] As in Fig. 3a with dashed lines, an air curtain 22 is formed during operation or upon activation of the blower unit(s), which extends from the outlet openings 18a-g to the work surface 12. The arrangement of the outlet openings 18a-g ensures that the air curtain 22 extends over the entire length of the counter 2, ie between the left and right sides or from bar 14a to bar 14b, and at the height from the outlet opening to the work surface 12. The air flow of the curtain 22 prevents flying insects from penetrating the protected space R. As in Fig. As shown in Figure 3a, the air curtain 22 runs in the flow direction (illustrated by an arrow) at an angle to the vertical, i.e., the air curtain is inclined toward the work surface 12. This means that the air curtain 22, or rather its flow direction, is not vertically aligned. Due to the inclination of the air flow / air curtain 22, insects, even if they fly into the air curtain 22, are blown or carried away by the air flow from the protected space R or the display area 10.

[0043] As in the detailed view Fig. As shown in Figure 3b, each outlet opening 18a has an outlet nozzle 19 with at least one guide element 20, which deflects the air flow emerging laterally from the outlet opening 18a downwards towards the work surface 12. The outlet nozzle 19 has an outlet angle w which lies between 30°-90°, preferably 40°-80°, particularly preferably 45°-70°. The outlet angle w determines the position of the outer boundary 23b and inner boundary 23a of the air curtain 22. The outlet nozzle 19 is designed such that, as described above with respect to Fig. 1, the outer boundary of the air curtain 22 is horizontal or substantially horizontal.

[0044] In this embodiment, the outlet openings 18a-g are arranged on a side of the pipe 16 facing the personnel side P. This ensures that the outlet openings 18a-g or nozzles 19 are easily accessible for cleaning. Furthermore, this prevents any condensation that may occur in the pipe 16 from dripping down onto the display surface 10. In this embodiment, the pipe 16 has a rectangular cross-section, which simplifies the fastening and seamless connection to the connecting element 26 or the front panel unit 9.

[0045] In this embodiment, the insect repellent device or the counter 2 additionally has a sliding door unit with two sliding doors 24a, 24b, which in the closed position ( Fig. 2a-b) separates the protected area R and thus the display area 10 from the surroundings. The sliding doors 24a, 24b are guided on their top and bottom sides by guide rails 30a, 30b, with the rails 30a, 30b being respectively attached to the work surface 12 and the pipe 16. The rails 30a, 30b connect seamlessly or tightly to the work surface 12 and the pipe 16, so that the door unit, in the closed position, represents an additional barrier against flying insects.

[0046] Optionally, the repellent device can be equipped with a switching element (not shown) that deactivates the blower unit(s) when the door unit is closed and reactivates them when the door unit is opened or in the open position. This way, the blower unit is only activated when the door unit is open, significantly reducing the energy consumption of the insect repellent device.

[0047] In order to completely shield the space R above the display area 12 from the outside, a side panel 34 ( Fig. 2a) or side panel. The side panels 34 are connected seamlessly or essentially seamlessly to the front panel unit 9 and the respective beams 14a-b, so that the room R is completely shielded from the outside when the sliding doors 24a, 24b are closed. When the sliding doors 24a, 24b are open, the air curtain 22 forms a barrier, so that the room R and the display area 10 are protected from flying insects such as wasps at all times.

[0048] In this embodiment, an optional intermediate level 32 is provided above the display area 10 for the display of additional products. As shown in Fig. 3a, the air curtain 22 or the air flow is adjusted or adjustable by means of the outlet nozzles 19 such that a display area of the intermediate level 32 is also located in the protected space R or behind the air curtain 22.

[0049] Optionally, the air conveyed by the blower unit 38 is cleaned, germ-free, and / or ionized. For pre-treating the air to be conveyed, the insect repellent device can comprise a corresponding air treatment unit 41. In addition, an additive, such as water, water droplets, water vapor, and / or fragrances, can be added to the conveyed air at least temporarily by means of the air treatment unit 41, so that an aerosol is used to form the air curtain 22. For example, an additive can be added as needed and / or at predetermined time intervals. Furthermore, the repellent device can have a heating and / or cooling device for the air conveyed by the blower unit 8, wherein the temperature of the air conveyed by the blower unit 38 can be adjusted by means of the control unit 40.

[0050] Fig.4 shows a schematic, not-to-scale plan view of a sales room V to illustrate an animal-friendly wasp repellent concept for the sales room V. In the sales room V, a counter 2, 2' with an insect repellent device as described above is arranged. Outside the sales room V, in an outdoor area A, near an entrance to the room V, two wasp nest dummies 42 are arranged as an example. Wasps are territorial, and dummies 42 simulate the presence of a wasp colony. This deters wasps, and the number of wasps that fly into the sales room V is reduced. Wasp nest dummies 42 can, for example, be placed near any building opening (window, door) to increase this effect.Furthermore, in the sales room V, two wasp live traps 44 are arranged, for example, which can catch the already reduced number of wasps after they have been prevented from flying into the counter display by the air curtain 22, 22' as described above or before they even fly to the counter 2, 2'. Reference symbol 2, 2' counter 4, 4' base body 6 Windscreen vertical 8 Windscreen horizontal 9.9' windscreen unit 10, 10' display area 12, 12' work surface 14a-b Holm 16, 16' pipeline 18a-g, 18' outlet opening 19 Outlet nozzle 20 Guide element 22, 22' air curtain 23a-b Limit air curtain 24a-b sliding door 26 connecting element 28 Lighting rail 30a-b guide rail 32 mezzanine floor 34 Side window / plate 36, 36' counter top 38 Blower unit 40 Control unit 41 Air treatment unit 42 wasp nest decoy 44 Wasp live trap K Customer side P Personnel page R protected space V Salesroom A Outdoor area w Outlet angle QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] EP 0 813 359 B1

[0002] WO 2022 / 173286 A1

[0002]

Claims

[1] Sales counter with insect repellent device, the counter (2, 2') comprising: a base body (4, 4') with a display surface (10, 10') and an adjoining work surface (12, 12') for personnel, a front panel unit (9, 9') attached to the base body (4, 4') for separating the display area (10, 10') from a customer side (K) of the counter (2, 2'), the insect repellent device comprises: a control unit (40), an air guidance system arranged on the base body (4, 4') with at least one outlet opening (18a-g, 18') in an area above the display surface (10, 10') and / or work surface (12, 12'), and at least one blower unit (38) for conveying air in the air guidance system to the at least one outlet opening (18a-g, 18'), wherein the at least one outlet opening (18a-g, 18') is designed to generate an air curtain (22, 22') which extends from the at least one outlet opening (18ag, 18') to the work surface (12, 12'), and the air curtain (22, 22') forms a barrier between the display surface (10, 10') and an area surrounding the counter (2, 2'). [2] Sales counter according to claim 1, wherein the at least one outlet opening (18a-g, 18') has a nozzle element (19) or the at least one outlet opening is designed as a nozzle, so that air flowing from the outlet opening (18a-g, 18') can be directed to the work surface (12, 12') and / or an air curtain (22, 22') can be generated between the display surface (10, 10') and the work surface (12, 12'). [3] Sales counter according to claim 1 or 2, wherein the at least one outlet opening (18a-g, 18') and / or the nozzle element (19) is designed to discharge air at an inclination angle between 30°-70° to the vertical, preferably between 45°-60°, so that an air curtain (22, 22') inclined to the vertical can be generated. wherein the at least one outlet opening (18a-g, 18') and / or the nozzle element (19) has an outlet angle (w) between 30°-90°, preferably 40°-80°, particularly preferably 45°-70. [4] Sales counter according to claim 1, 2 or 3, wherein the air guidance system is at least partially integrated into the base body (4, 4') of the counter (2, 2'). [5] Sales counter according to one of the preceding claims, wherein the air guidance system connects to the front panel unit (9, 9') at least in the region of the at least one outlet opening (18a-g, 18'), and / or wherein the air guidance system has an outlet pipe (16, 16') running horizontally above the display surface (10, 10') with the at least one outlet opening (18a-g, 18'), and the outlet pipe (16, 16') connects to the front panel unit (9, 9'), in particular connects it without gaps. [6] Sales counter according to one of the preceding claims, wherein the at least one outlet opening (18a-g) is arranged on a side of the air guidance system or outlet pipe (16) facing the personnel side (P). [7] Sales counter according to one of the preceding claims, wherein the at least one outlet opening (18a-g, 18') and / or a plurality of outlet openings are arranged such that a continuous or substantially continuous air curtain (22, 22') towards the work surface (12, 12') can be generated over the entire length or substantially the entire length of the display surface (10, 10'). [8] Sales counter according to one of the preceding claims, wherein a plurality of outlet openings (18a-g) are provided with a length between 10 cm to 25 cm, preferably between 10 cm to 15 cm, a width between 3 cm to 6 cm, preferably between 4 cm to 5 cm, and a distance between adjacent outlet openings between 5 cm to 8 cm. [9] Sales counter according to one of the preceding claims, wherein the counter (2, 2') has at least one side window and / or side plate, so that the display area (10, 10') is laterally shielded between the customer side (K) and the staff side (P). [10] Sales counter according to one of the preceding claims, wherein a door unit is arranged between the display surface (10, 10') and the work surface (12, 12') to separate the display surface from the work surface. [11] Sales counter according to claim 10, wherein the door unit is formed from at least one sliding door (24a, 24b), a rolling door, a roller shutter or a folding door. [12] Sales counter according to claim 10 or 11, wherein the control unit (40) is designed to deactivate the at least one blower unit (38) when the door unit is closed and to activate it when the door unit is open. [13] Sales counter according to claim 10, 11 or 12, with a switching element connected to the control unit (40) for activating and deactivating the at least one blower unit (38), wherein the switching element can be actuated by closing and / or opening the door unit. [14] Sales counter according to one of the preceding claims, with at least one air treatment unit (41) for pre-treating the air conveyed by the blower unit (38) so that the air conveyed by the blower unit (38) is cleaned, germ-free and / or ionized, wherein in particular at least one additive selected from water, water droplets, water vapor and / or fragrances can be added to the conveyed air by means of the air treatment unit (41). [15] Sales counter according to one of the preceding claims, wherein the defense device comprises a heating and / or cooling device, and the temperature of the air conveyed by the blower unit (38) can be adjusted by means of the control unit (40). [16] Sales counter according to one of the preceding claims, wherein the at least one blower unit (38) is designed to provide an air curtain (22, 22') with a flow velocity of 4 m / s - 11 m / s, preferably between 6 m / s - 10 m / s, particularly preferably of at least 8 m / s, wherein the flow velocity is continuously adjustable in particular by means of the control unit (40). [17] Insect repellent device, in particular against wasps, as a kit for retrofitting a sales counter (2, 2'), the repellent device comprising: a control unit (40), an air guidance system with at least one outlet opening (18a-g, 18'), wherein the air guidance system can be arranged on a base body (4, 4') of a sales counter (2, 2') when in use, so that the at least one outlet opening (18a-g, 18') is located in an area above a display surface (10, 10') of the counter (2, 2') and / or a work surface (12, 12') of the counter (2, 2'), at least one blower unit (38) for conveying air in the air guidance system to the at least one outlet opening (18a-g, 18'), wherein the at least one outlet opening (18a-g, 18') is designed to generate an air curtain (22, 22') which extends from the at least one outlet opening (18ag, 18') to the work surface (12, 12'), and the air curtain (22, 22') forms a barrier between the display surface (10, 10') and an area surrounding the counter (2, 2'). [18] Wasp control concept for a sales room (V) with at least one wasp nest dummy (42) to be arranged in an outdoor area (A) in front of the sales room (V), at least one wasp live trap (44) is to be arranged within the sales area (V), and a sales counter (2, 2') with an insect repellent device according to one of the preceding claims 1 to 16.

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