Vehicle for a warehouse and a warehouse system having such vehicle

Abstract

The present disclosure relates to a vehicle (100) for transporting a storage bin in a warehouse. The vehicle (100) comprises a housing (110, 120, 130) and a fire extinguisher (150) configured to release an extinguishing agent into the housing. The vehicle is contemplated as an electric cabinet on wheels having a fire extinguisher on board allowing to extinguish a fire or cool down and overheated component (141, 146), which eliminates the main sources of ignition / fire in such vehicles.

Description

Technical Field

[0001] The present disclosure generally relates to a vehicle for transporting a storage bin in a warehouse, the vehicle being capable of extinguishing a fire, and a warehouse system comprising a warehouse module and such vehicle. Particularly, the vehicle includes a fire extinguisher capable of releasing an extinguishing agent into a housing of the vehicle. Furthermore, the present disclosure relates to a warehouse system having one or more warehouse modules and such a vehicle.Background

[0002] A conventional warehouse system includes vehicles configured to retrieve or place a storage bin in the warehouse system. Such vehicles can drive autonomously and / or under control of an overall control unit of the warehouse system. In order to protect the warehouse system from fire, a sprinkler system is usually installed in the building or room in which the warehouse system is installed. Thus, in case of a fire, the sprinkler system can immediately extinguishing the fire.

[0003] However, such sprinkler systems are not only expensive in order to cover the entire area of the building or room in which the warehouse system is installed but, also, such sprinkler systems, once activated, spray a lot of water over the warehouse system and the goods stored in the warehouse system, which may lead to damages caused by the water.Summary

[0004] It is therefore an object of the present disclosure to provide a warehouse system with improved fire extinguishing capabilities, and particularly a cost-effective solution for that purpose.

[0005] This object is solved by the present invention as defined in the independent claims. Preferred embodiments are defined in the dependent claims.

[0006] According to a first aspect, a vehicle for transporting a storage bin in a warehouse comprises a housing and a fire extinguisher configured to release an extinguishing agent into the housing.

[0007] It has been found that a main source of fire or a source of ignition in a warehouse or warehouse system are energised components in the warehouse system. Regularly, a warehouse system runs with electricity, so that electrical or electronic components, such as a motor, cable, accumulator (battery), or the like, are the main source of ignition (or "inflammation"). Releasing a fire extinguishing agent into the housing of the vehicle has the advantage of providing fire extinguishing means as close as possible at one of the possible sources of fire. Specifically, a vehicle for transporting storage bins regularly includes one or more motors, cables, electric and / or electronic components, a battery, and the like, all of which are possible sources of ignition and / or sources of heat generation. Thus, it may be said that the present disclosure contemplates a vehicle for a warehouse as a "moving electric cabinet" or "electric cabinet on wheels", which is equipped with a fire extinguisher.

[0008] Providing a fire extinguishing agent in close proximity to the main sources of ignition or sources of a fire thus can avoid spreading of a fire to other parts of the warehouse, particularly the bins and goods stored therein. Since the released fire extinguishing agent is within the housing of the vehicle, the fire extinguishing agent may not be spread onto regions further away from the source of ignition, as it is the case in conventional sprinkler systems. Thus, damages usually caused by such sprinkler systems can be avoided or at least reduced.

[0009] Furthermore, expensive sprinkler systems covering the entire warehouse can be omitted, which significantly reduces the installation costs of a warehouse system. The fire extinguisher of the present disclosure is on board and travels with the vehicle.

[0010] In a variant, the extinguishing agent can be in a liquid state when being released into the housing. The extinguishing agent can be configured to change to a gaseous state when reacting with the environment, such as air in the ambient environment of the vehicle.

[0011] Alternatively, the extinguishing agent can be in a gaseous state when being released into the housing. As a mere example, the extinguishing agent can be or can change to a gaseous state when being released.

[0012] A gaseous extinguishing agent can cover or surround the fire or overheated component and, hence, can reduce the amount of oxygen available for a fire. A gas distributes more easily within the housing of the vehicle and, particularly, between installed components in the interior of the housing, compared to liquid or powdery extinguishing agents. In addition, a gaseous extinguishing agent causes less or no damages to other items in the vicinity of the vehicle, such as stored items in the warehouse system.

[0013] In a variant, the fire extinguisher can comprise a tank configured to store the fire extinguishing agent, an expansion valve fluidly coupled to the tank, and a trigger mechanism. Thus, the fire extinguisher can have a simple structure, which reduces costs of the vehicle and, hence, costs of the warehouse.

[0014] In a variant, the trigger mechanism can be configured to open the expansion valve when an ambient temperature around the trigger mechanism exceeds a threshold value. As a mere example, the trigger mechanism can be a mechanical structure that changes its form with increasing temperature, while such change of its form allows opening the expansion valve. For instance, the trigger mechanism can be a metal, plastic or other material coupled to the expansion valve, which is configured to change its shape (e.g., length) with increasing temperature, thereby opening the expansion valve.

[0015] According to another example, the trigger mechanism can be a conventional heat-sensitive glass bulb containing a fluid (e.g., a gas or liquid). Due to the thermal expansion of the fluid, the glass bulb will break dependent on the ambient temperature. Different kinds of fluid in the glass bulb can be employed, so that the fluid has different characteristics, for example, depending on the ambient temperature. This allows having a variety of glass bulbs to choose from, which break at different temperatures. Therefore, the trigger mechanism can be pre-set to open the expansion valve at a desired ambient temperature.

[0016] The trigger mechanism (metal or plastic structure, or glass bulb) can be arranged to apply a pressure on the expansion valve. The expansion valve itself can be biased in the direction of the trigger mechanism. Thus, the change of shape or the breaking of the trigger mechanism allows the biased expansion valve to open, for example, by a biasing element acting on a closure element of the expansion valve.

[0017] Alternatively, the trigger mechanism can hold a moving part of the valve in a position spaced apart from a closure of the tank (e.g., a membrane, disc or similar element blocking an outlet of the tank). A biasing element acts on the moving part of the valve. Thus, once the trigger mechanism (metal or plastic structure, or glass bulb) is activated, the moving part can move towards the closure of the tank and can open the closure. As a mere example, a needle or similar sharp element can be pushed through the closure of the tank due to the biasing force acting on the moving part.

[0018] It is to be understood that the trigger mechanism can likewise move the expansion valve from a closed position to an open position directly, for example, in case of a mechanical structure configured to pull or push on the expansion valve under increasing temperature influence.

[0019] In a variant, the trigger mechanism can be configured to open the expansion valve when receiving a remote activation signal. Such activation signal can be an electric signal, including an electric current flowing through the trigger mechanism. As a mere example, the electric current can increase the temperature of the trigger mechanism, which may then directly or indirectly open the expansion valve as described above. It is to be understood that any actuator activated by the remote activation signal can be employed to trigger opening the expansion valve or to directly open the expansion valve, including an electric motor, a hydraulic or pneumatic actuator, or the like.

[0020] In a variant, the tank can be configured to store the fire extinguishing agent under pressure. Thus, a small tank can be installed in or at the vehicle, while a large amount of extinguishing agent can be released into the housing of the vehicle. This allows expanding the extinguishing agent using the expansion valve, which reduces the temperature of the extinguishing agent. Thus, the source of ignition or fire can further be cooled while releasing the extinguishing agent.

[0021] As a mere example, the fire extinguishing agent can be stored under pressure and in a liquid state. This allows expanding the extinguishing agent using the expansion valve at an even higher ratio, particularly, when changing from the liquid state to the gaseous state. Thus, the amount of gaseous extinguishing agent can be increased and the temperature of the released agent can be reduced compared to the storage of a gaseous agent in the tank.

[0022] In a variant, the extinguishing agent can be an inert gas, nitrogen, carbon dioxide or a specific fire extinguishing material such as a fluorinated ketone. As a mere example, the fire extinguishing agent can be FK-5-1-12 (also referred to as Novec 1230). As a mere example, the fire extinguishing agent can react with oxygen or change into the gaseous state when being in contact with oxygen.

[0023] In any case, the fire extinguishing agent displaces air in the housing of the vehicle and thereby deprives the fire of oxygen.

[0024] As a mere example, the extinguishing agent can be electrically non-conductive. Furthermore, the extinguishing agent, when released and forming a gaseous cloud, can have a concentration where it is non-hazardous to people.

[0025] In a variant, the fire extinguisher comprises at least an outlet arranged in an upper region of the housing. Since the released extinguishing agent will be cooler than the hot air due to a fire or overheated element, the gaseous agent will flow towards a bottom of the housing and, hence, along the source of ignition or fire, which facilitates extinguishing the fire. Furthermore, since the upper portion of a vehicle housing is regularly closed, in order to avoid particles to fall into the vehicle, arranging the outlet in an upper region of the housing facilitates an effective spreading of the released extinguishing agent in the space encased by the housing.

[0026] In a variant, the outlet of the fire extinguisher can comprise at least one nozzle configured to direct at least a portion of the extinguishing agent towards an internal component of the vehicle. As a mere example, an electric fuse, switch or battery, or the like, that has the highest risk of catching fire, can be the target of the at least one nozzle. Thus, this internal component of the vehicle will receive the released extinguishing agent first and will, hence, be cooled the most.

[0027] It is to be understood that the fire extinguisher can comprise a plurality of outlets and / or a plurality of nozzles, each of which is configured to direct a portion of the extinguishing agent towards an associated internal component of the vehicle. Thus, the interior of the housing can be divided into multiple zones, in which a fire can be extinguished.

[0028] Likewise, each outlet or nozzle or groups thereof may be provided with a respective trigger mechanism, so that the fire extinguishing agent can be released into one or more of the multiple zones of the interior of the housing individually.

[0029] In a variant, at least the tank of the fire extinguisher is arranged within the housing. This allows providing a compact vehicle having a fire extinguisher "on board". As a mere example, a dedicated room for the fire extinguisher may be provided inside of the housing. This room may be separated from other areas inside of the housing, for example by a lateral wall and / or bottom wall or other casing. In case of a leakage of the extinguishing agent or other failure of the fire extinguisher, the internal component(s) of the vehicle may not be affected or damaged.

[0030] Alternatively, the tank of the fire extinguisher can be arranged outside of the housing. This prevents any damage to an internal component in case of a leakage of the tank. Furthermore, maintenance of the fire extinguisher is much easier and, hence, more cost-effective.

[0031] In a variant, the vehicle can further comprise a safety switch configured to switch off the vehicle or at least a part thereof in case the fire extinguisher releases the extinguishing agent. As a mere example, the safety switch can be coupled to the trigger mechanism, so that activation of the trigger mechanism (opening of the expansion valve) also activates the safety switch. For instance, an electric or mechanical coupling of the trigger mechanism with the safety switch can be provided, so that activation of the trigger mechanism changes the electric or mechanical coupling. Thus, all electrical components of the vehicle can be switched off, so that all sources of ignition are shut down.

[0032] In a variant, the housing can comprise at least one opening. This allows escaping of the extinguishing agent from the housing. Particularly, since the agent will expand when being released from the tank, a closed housing would lead to an increased pressure inside of the housing. In order to avoid any damage to the housing and vehicle, the at least one opening can release the pressure.

[0033] In a variant, the at least one opening in the housing can be at a position of approximately maximum distance to the releasing means of the fire extinguisher. For instance, a distance between an outlet (such as a nozzle) of the fire extinguisher and the at least one opening shall approach a maximum, to allow the extinguishing agent to flow through the entire space encased by the housing. For instance, the at least one opening can be arranged in a bottom region of the housing, particularly, when the extinguishing agent is released in an upper portion of the housing.

[0034] In a variant, the at least one opening can be arranged in a lateral sidewall or a ceiling of the housing. This allows closing a bottom region of the housing, i.e., the housing is closed in a downward direction, particularly in the direction of the rails. Such structure of the housing allows an extinguishing agent that is heavier than air to sink towards the bottom region before escaping through the at least one opening. Thus, the (entire) space encased by the housing can be filled with the heavier extinguishing agent.

[0035] In a variant, the housing can comprise a head housing forming a top portion of the vehicle, a cantilever housing configured to extend from the head housing, and a base housing arranged below the head housing. The fire extinguisher can be configured to release the extinguishing agent in any of the head housing, cantilever housing and base housing.

[0036] As a mere example, at least a portion of the fire extinguisher can be arranged in any of the head housing, cantilever housing and base housing. For instance, at least an agent releasing portion of the fire extinguisher is arranged in the head housing or the cantilever housing, since they are forming upper regions of the vehicle.

[0037] In a variant, the housing can comprise a housing lid. The fire extinguisher can be mounted to an inner side of the housing lid. This allows easy maintenance of the fire extinguisher, for example, by releasing the housing lid to have easy access to the fire extinguisher.

[0038] In a variant, the housing can encase at least one internal component of the vehicle. Thus, the extinguishing agent is released in close proximity to the at least one internal component, which may be a source of ignition or fire.

[0039] As a mere example, the at least one internal component can comprise one or more of an electric and / or electronic component, a motor, a cable and a battery. It is to be understood that the internal components are not limited to these items, but that any other source of ignition or fire inside of the housing (and regularly required to operate the vehicle) can be considered as an internal component arranged inside of the housing.

[0040] In a variant, the vehicle can be configured to retrieve a storage bin in a warehouse (or warehouse system), the warehouse comprising a storage area adapted to accommodate a plurality of storage bins, wherein the vehicle is configured to be movable to retrieve storage bins from the storage area so that the storage bin is shiftable / movable / transportable by the vehicle through the warehouse. The storage area may accommodate a plurality of stacks of storage bins, wherein the vehicle is configured to be movable to retrieve storage bins from the plurality of stacks.

[0041] In a variant, the warehouse comprises at least one warehouse module comprising a top level arranged above the storage area, wherein the vehicle is configured to be movable at the top level, and wherein retrieving a storage bin from a respective stack of the storage area includes raising the storage bin from the stack to the top level so that the storage bin is shiftable by the vehicle along the top level.

[0042] In a variant, the vehicle can comprise a gripper configured to grip a storage bin to raise (or "while raising") the storage bin from the storage area or from a respective stack thereof and to shift (or "while shifting") the storage bin accordingly. As a mere example, the gripper can be arranged to extend beyond a main body of the vehicle so that the storage bin is arranged alongside the main body on a first vertical side of the main body.

[0043] For instance, when the storage bin is raised to the top level, the storage bin may be arranged alongside the main body. The gripper can be configured to grip a storage bin at a respective stack, so that the gripper or another component of the vehicle can raise the storage bin (e.g., to the top level). While still gripping the storage bin, the vehicle can move, so that the storage bin is shifted (e.g., along the top level) accordingly.

[0044] In a variant, the gripper can comprise a one or more clasps configured to grip the storage bin. For example, the one or more clasps can be configured to engage with the storage bin, for instance, at a respective outer side of the storage bin. As a mere example, the storage bin may have a recess or protrusion forming a handle or recessed / protruding grip of the storage bin. The one or more clasps can be configured to engage with such recess or protrusion. Furthermore, the storage bin can be a standardized storage box (e.g., Euro box), a crate for beverages, a wooden box, a standardized pallet, or the like.

[0045] In a variant, the vehicle can comprise an alternating mechanism configured to change a position of the gripper with respect to the main body so that, when a storage bin is gripped (and, for example, raised to the top level), the storage bin is arranged - in the changed position - alongside the main body on a second vertical side of the main body. In one such variant, the gripper may be telescopically extendable beyond the first vertical side of the main body and telescopically extendable beyond the second vertical side of the main body, wherein the alternating mechanism may comprise a sliding mechanism configured to alternatingly slide the gripper between a telescopic extension beyond the first vertical side of the main body and a telescopic extension beyond the second vertical side of the main body. In another such variant, the alternating mechanism may comprise a rotating mechanism configured to rotate the gripper between a rotational position in which the gripper extends beyond the first vertical side of the main body and a rotational position in which the gripper extends beyond the second vertical side of the main body. As a mere example, the rotating mechanism can be arranged at a top of the body of the vehicle. In addition, the rotating mechanism can be configured to rotate around a vertical axis and about 360° and / or about 180° in each direction.

[0046] In a variant, the vehicle can further comprise a plurality of rollers configured to move the vehicle. As a mere example, the vehicle may be configured to move on a floor of a warehouse or any other surface. For instance, the vehicle can move on the floor or surface when a storage bin is gripped by the gripper, in order to transport the storage bin accordingly.

[0047] Alternatively or additionally, the rollers may be configured to move the vehicle in one or more rails provided in a warehouse to form a dedicated path, where a vehicle shall move. Thus, instead of a free movement of the vehicle, the rollers of the vehicle engage with the one or more rails, in order to move and, hence, transport a storage bin along the rail(s).

[0048] Further alternatively or additionally, the rollers may be configured to move the vehicle at the top level of the storage module, for example. Thus, the rollers may be configured to move on a dedicated surface arranged at the top level of the storage module. As a mere example, rails may be provided at the top level or may form the top level, wherein the rollers are configured to move in such rails. As a mere example, the rails may be arranged in a grid-like manner above the stacks of storage bins, so that the vehicle is able to move along the grid, for example, along two orthogonal directions.

[0049] In a variant, the vehicle can further comprise a roller actuator configured to rotate at least one of the plurality of rollers. The roller actuator can be configured to rotate one of the rollers, a pair of rollers or even all of the plurality of rollers. Alternatively, more than one roller actuator can be implemented in the vehicle, i.e., in order to rotate more than one roller (e.g., but each roller separately).

[0050] According to a second aspect, a warehouse system comprises at least one warehouse module comprising a storage area and a top level arranged above the storage area, the storage area being adapted to accommodate a plurality of stacks of storage bins, and at least one vehicle according to the first aspect. Furthermore, the at least one vehicle is configured to be movable at the top level of the at least one warehouse module.

[0051] Thus, a warehouse system being operated with one or more vehicles as disclosed herein includes a fire extinguishing capability. Thus, the warehouse system can be installed in a short time and is very cost-effective compared to a warehouse system having a conventional sprinkler system.

[0052] In a variant, the warehouse system can further comprise a control unit configured to communicate with the at least one vehicle. The at least one vehicle can be configured to transmit a signal to the control unit indicating an increased temperature and / or fire at the vehicle. For instance, the vehicle can be equipped with a heat and / or fire detecting sensor and a communication unit configured to send the signal to the control unit of the warehouse system.

[0053] The control unit may further be configured to set a fire alarm signal. As a mere example, the at least one vehicle indicates an incident to the control unit of the warehouse system via the transmitted signal, while the control unit can set a fire alarm with respect to the entire warehouse system. For instance, the fire alarm may include a visible and / or audible signal to an operator of the warehouse system (either at the site of the warehouse system or remote depending on the location of the operator). Furthermore, the fire alarm signal can be forwarded from the control unit of the warehouse system to a fire department.

[0054] In a variant, the warehouse system comprises a plurality of vehicles, and the control unit can be configured to receive a signal from a first vehicle indicating the increased temperature and / or fire at the first vehicle, and to transmit a signal to a second vehicle indicating to the second vehicle to drive towards the first vehicle and to activate the fire extinguisher of the second vehicle. The extinguishing agent released from the fire extinguisher of the second vehicle may also be released from the housing, for example, through at least one opening in the housing. Thus, in the vicinity of the second vehicle, now close to the first vehicle, an increased amount of released extinguishing agent is present. Thus, while the vehicles are capable of self-extinguishing a fire or cooling an overheated component, the risk of the fire catching other items in the warehouse system is reduced.

[0055] Alternatively, the control unit of the warehouse system may transmit a signal to a second vehicle indicating to move away from the first vehicle. This avoids that the second vehicle catches fire from the first vehicle.

[0056] In a variant, the control unit of the warehouse system can be further configured to switch off operation of the warehouse system, once the signal from the at least one vehicle is received at the control unit. For instance, an electric supply of the warehouse system may be switched off, for example, using a security switch. Alternatively, particularly electric and / or electronic components of the warehouse system can be switched off.

[0057] The present disclosure is not restricted to the aspects and variants in the described form and order. Specifically, the description of aspects and variants is not to be understood as a specific limiting grouping of features. It is to be understood that the present disclosure also covers combinations of the aspects and their variants. Thus, each variant or optional feature can be combined with any other aspect, variant, optional feature or even combinations thereof.Brief Description of the Drawings

[0058] In the following, the present disclosure will further be described with reference to exemplary implementations illustrated in the figures, in which: Figure 1schematically illustrates a warehouse system; Figure 2schematically illustrates a perspective view of a vehicle for transporting a storage bin; Figure 3schematically illustrates a side view of a partially opened vehicle for transporting a storage bin; Figure 4schematically illustrates a further side view of the partially opened vehicle of Figure 3; and Figure 5schematically illustrates a fire extinguisher. Detailed Description

[0059] In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the present disclosure. It will be apparent to one skilled in the art that the present disclosure may be practiced in other implementations that depart from these specific details.

[0060] Figure 1 schematically illustrates a warehouse system 20 in the form of a modular storage system. Specifically, the warehouse system 20 as illustrated comprises two warehouse modules 200. As can be seen, the exemplary warehouse storage module 200 provides space for a three-dimensional arrangement of storage bins 202, wherein the storage module 200 comprises a storage area 204 and a top level 206 arranged above the storage area 204. In the storage area 204, vertical stacks 208 of storage bins 202 are arranged in a horizontal two-dimensional grid at the bottom of the storage module 200. In other words, the two-dimensional grid may extend in a longitudinal direction X and in a transverse direction Y at the bottom of the storage module 200, wherein, at each cell of the two-dimensional grid, a base for a stack 208 that may grow in the vertical direction Z may be formed. Each such space comprising the base for a stack 208 including the vertical space above the base for accommodating the bins 202 of the stack may be called a "storage cell", as referred to herein. At the top level 206, a vehicle 100 is shown which is movable (horizontally at the top level 206) in alignment with the two-dimensional grid above the respective stacks 208 to retrieve and place storage bins 202 from and to the plurality of stacks 208. A two-dimensional grid of rails 212, in which rollers 180 (Figure 2) of the vehicle 100 may engage, may form the bottom of the top level 206, which separates the top level 206 from the storage area 204. If the modules 200 are stacked, several travelling levels 206 are created, which make it possible to run several parallel storage and retrieval processes at the same time, thus significantly increasing performance.

[0061] At an outer edge of the top level 206 of the storage module 200 the at least one vehicle 100 can reach a handover point of the warehouse storage module 200, the handover point being located outside of the storage area 204. Thus, the vehicle 100 is capable of moving storage bins 202 in and out of the storage module 200. Figure 1 illustrates two handover points, but it will be understood that the warehouse system 20 is not limited to these particular handover points. Furthermore, each vehicle 100 can be equipped with a belt or rope 160 allowing the storage bin 202 to be raised and lowered, either from and to the handover point or from and to one of the plurality of stacks 208. This may include a cantilever housing 120 of the vehicle 100, which extends from a base 130 (Figure 2) of the vehicle 100, and where the belt or rope 160 is coupled to.

[0062] Figure 2 schematically illustrates a perspective view of a vehicle 100 for transporting a storage bin 202 (not illustrated in Figure 2) in a warehouse. The vehicle comprises a housing 110, 120, 130. Specifically, the vehicle 100 can comprise a base housing 130, to which rollers or wheels 180 are mounted. The base housing 130 can comprise side walls 132, 133 as well as a lid 131. As a mere example, one or more of the sidewalls 132, 133 can comprise an opening 135.

[0063] The vehicle 100 can further comprise a head housing 110 forming a head or top portion of the vehicle 100. This head housing 110 can likewise include a lid 111 and sidewalls 112, 113. A cantilever housing 120 can extend from the head housing 110, and can also comprise a lid 121 and at least one sidewall 123. The cantilever housing 110 may encase a motor 144 for the belt or rope 160. At an end of the belt or rope 160 there may be a gripper 162 configured to grip a storage bin 202. By correspondingly operating the motor 144, the storage bin 202 can be lifted and lowered by winding or unwinding the belt or rope 160, respectively.

[0064] As a mere example, the head housing 110 may be configured to rotate relative to the base housing 130 around a vertical axis. This allows turning the cantilever housing 120, and hence a storage bin 202 gripped by the gripper 162, around the base housing 130, for example, in order to bring the storage bin 202 above a different stack 208 or over the outer edge of the warehouse module 200, such as to reach a handover point.

[0065] Furthermore, each wheel 180 may be configured to rotate around a vertical axis (particularly to be rotated by an actuator), in order to control a direction into which the vehicle 100 moves. Thus, the vehicle 100 can particularly move in the X and Y directions at the top level 206.

[0066] Turning to Figures 3 and 4, schematically illustrating respective side views of the vehicle 100, the vehicle 100 can further comprise a fire extinguisher 150 configured to release an extinguishing agent 155 (Figure 5). In order to illustrate the fire extinguisher 150 and further internal components of the vehicle 100, Figures 3 and 4 illustrate the vehicle 100 in a partially open state, where portions of the sidewalls 132, 133 are removed. The sidewalls 132, 133 are only shown at the corners of the vehicle 100. With additional reference to Figure 5, the fire extinguisher 150 can comprise a tank 151 configured to store the fire extinguishing agent 155, an expansion valve 152 fluidly coupled to the tank 151, and a trigger mechanism 153.

[0067] As can be derived from Figures 3 and 4, the fire extinguisher is configured to release the extinguishing agent 155 into the housing 110, 120, 130. As a mere example, an outlet 154 of the fire extinguisher 150 is arranged in an interior space of the housing 110, 120, 130. Thus, the interior space of the housing 110, 120, 130 is flooded with the fire extinguishing agent.

[0068] For instance, the trigger mechanism 153 can be configured to open the expansion valve 152 when an ambient temperature around the trigger mechanism 153 exceeds a threshold value and / or to open the expansion valve 152 when receiving a remote activation signal.

[0069] The trigger mechanism 153 can change its shape or form due to an increasing ambient temperature. When coupled to the expansion valve 152 and / or a closure (not illustrated) of the tank 151, the trigger mechanism 153 can open the valve 152 and / or tank 151 to release the agent 155 from the tank 151. While the trigger mechanism 153 may be made from a material changing its shape or form due to the increasing ambient temperature, it may likewise burst at a pre-set or higher temperature. As a mere example, a glass bulb (not illustrated) including a fluid may be provided, wherein a characteristic of the fluid is a particular expansion ratio depending on the temperature, which increases the pressure in the glass bulb to a certain degree, until the glass bulb bursts at the pre-set temperature. Different fluids can be employed to have glass bulbs bursting at different pre-set temperatures.

[0070] The extinguishing agent 155 is stored in a gaseous state or a liquid state in the tank 151. Preferably, the extinguishing agent 155 is stored under pressure, and is in a gaseous state when being released or converts / changes into the gaseous state when reacting with the environment, such as air, oxygen or the like. Thus, the gaseous agent 155 expands in the interior space of the housing 110, 120, 130 and extinguishes any fire. Alternatively or additionally, due to the expansion of the agent 155, a cold gas surrounds any overheated component (source of ignition), so that such component is cooled and a fire may be prevented (even before it starts). Furthermore, the extinguishing agent can be stored in a liquid state in the tank 151. This increases the expansion ratio of the agent 155 when being released from the outlet / nozzle 154, and hence further cools the agent 155 when being released.

[0071] The fire extinguisher 150 can further comprise at least one nozzle 154 configured to direct at least a portion of the extinguishing agent 155 towards an internal component 140 of the vehicle 100. As illustrated in Figure 5, the extinguishing agent 155 can be released in two opposite directions from the nozzle 154. It is to be understood that the extinguishing agent 155 can be released in any direction and in the form of any number of streams (in different directions).

[0072] The outlet 154 of the fire extinguisher 150 can be arranged in an upper region of the housing 110, 120, 130. Thus, the cool gaseous agent 155 sinks in the housing 110, 120, 130 and floods the housing 110, 120, 130 from top to bottom. As a mere example, the gaseous agent 155 can be released through an opening 135 (Figure 2) or 136 (Figure 3) arranged in a bottom region of the housing 130. Thus, the gaseous agent 155 is forced to flow through the (entire) interior space of the housing 110, 120, 130 from top to bottom. Alternatively, the housing 110, 120, 130 may have one or more openings only in a top region of the vehicle, so that a fire extinguishing agent 155 that is heavier than air can fill the space encased by the housing 110, 120, 130.

[0073] It will be understood that several outlets / nozzles 154 can be provided inside of the housing 110, 120, 130. Likewise, a plurality of fire extinguishers 150, i.e., including a separate tank 151, can be provided inside of the housing 110, 120, 130. This allows flooding the interior of the housing 110, 120, 130 more effectively or in one or more of multiple extinguishing zones.

[0074] While Figures 3 and 4 illustrates the fire extinguisher 150, and particularly its tank 151, arranged inside of the housing 110, 120, 130, at least the tank 151 of the fire extinguisher 150 can be arranged outside of the housing 110, 120, 130 (not illustrated), for example. This facilitates maintenance of the tank 151 as it may be more easily reached for such maintenance.

[0075] Optionally, at least the tank 151 or the entire fire extinguisher 150 can be mounted to an inner side of a housing lid 111, 121. Thus, the fire extinguisher 150 can be easily reached by removing the lid 111, 121, for example, for maintenance of the fire extinguisher 150.

[0076] The housing 110, 120, 130 encases at least one internal component 140 of the vehicle 100 used to operate the vehicle 100. Only exemplarily, Figures 2 to 4 illustrate electric components 141, such as fuses, switches, or terminal blocks, as well as electronic components 142, such as a control unit or electrical cabinet component, as well as a battery 149, as well as a motor 144 for winding and unwinding the rope or belt 160, as well as a motor 146 for turning wheels 180. Each of these internal components 140 can be a source of ignition or fire. By arranging at least the outlet 154 of the fire extinguisher 150 above such internal components and / or by directing a stream of agent 155 from a nozzle 154 onto such internal component 140, an overheated component 140 can be cooled down and any fire can be extinguished.

[0077] As a mere example, the battery 149 can include lithium iron phosphate or the like, which allows forming a non-flammable or at least less-flammable energy storage.

[0078] The vehicle 100 can further comprise a safety switch 160 (Figure 4) configured to switch off the vehicle 100 or at least a part thereof in case the fire extinguisher 150 releases the extinguishing agent 155. For instance, the trigger mechanism 153 can further be configured to also trigger a signal to a control unit 142, which activates the safety switch 160 to shutoff the vehicle 100.

[0079] Alternatively or additionally, a temperature sensor (not illustrated) may be provided in the inner space of the housing 110, 120, 130. If the temperature sensor indicates a temperature above a threshold value, a control unit 142 of the vehicle 100 may activate the safety switch 160. In addition, the control unit 142 can also activate the trigger mechanism 153. As a mere example, an electric current may be applied to the trigger mechanism 153 increasing its temperature, so that it triggers the release of the fire extinguishing agent 155 from the tank 151.

[0080] Furthermore, the warehouse system 20 or one or more of the warehouse modules 200 can include a control unit 250 configured to communicate with the at least one vehicle 100. The at least one vehicle 100 can transmit a signal to the control unit 250 indicating an increased temperature and / or fire at the vehicle 100. The control unit 250 can then set a fire alarm signal, for example, to an operator or fire department.

[0081] Likewise, the control unit 250 can further be configured to control one or more other vehicles 100, in case such fire signal has been sent from a first vehicle 100. The other vehicles 100 can be either directed to approach the first vehicle 100 and to activate their respective fire extinguishers 150, so that a group of fire extinguishing vehicles is gathered together. Alternatively, the other vehicles 100 are directed to drive away from the first vehicle 100 (being overheated or having a fire).

[0082] It is believed that the advantages of the technique presented herein will be fully understood from the foregoing description, and it will be apparent that various changes may be made in the form, constructions and arrangement of the exemplary aspects thereof without departing from the scope of the disclosure or without sacrificing all of its advantageous effects. Because the technique presented herein can be varied in many ways, it will be recognized that the disclosure should be limited only by the scope of the claims that follow.

Examples

Embodiment Construction

[0059]In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the present disclosure. It will be apparent to one skilled in the art that the present disclosure may be practiced in other implementations that depart from these specific details.

[0060]Figure 1 schematically illustrates a warehouse system 20 in the form of a modular storage system. Specifically, the warehouse system 20 as illustrated comprises two warehouse modules 200. As can be seen, the exemplary warehouse storage module 200 provides space for a three-dimensional arrangement of storage bins 202, wherein the storage module 200 comprises a storage area 204 and a top level 206 arranged above the storage area 204. In the storage area 204, vertical stacks 208 of storage bins 202 are arranged in a horizontal two-dimensional grid at the bottom of the storage module 200. In other words, the two-dimensional grid may extend in a...

Technical Field

[0001] The present disclosure generally relates to a vehicle for transporting a storage bin in a warehouse, the vehicle being capable of extinguishing a fire, and a warehouse system comprising a warehouse module and such vehicle. Particularly, the vehicle includes a fire extinguisher capable of releasing an extinguishing agent into a housing of the vehicle. Furthermore, the present disclosure relates to a warehouse system having one or more warehouse modules and such a vehicle.Background

[0002] A conventional warehouse system includes vehicles configured to retrieve or place a storage bin in the warehouse system. Such vehicles can drive autonomously and / or under control of an overall control unit of the warehouse system. In order to protect the warehouse system from fire, a sprinkler system is usually installed in the building or room in which the warehouse system is installed. Thus, in case of a fire, the sprinkler system can immediately extinguishing the fire.

[0003] However, such sprinkler systems are not only expensive in order to cover the entire area of the building or room in which the warehouse system is installed but, also, such sprinkler systems, once activated, spray a lot of water over the warehouse system and the goods stored in the warehouse system, which may lead to damages caused by the water.Summary

[0004] It is therefore an object of the present disclosure to provide a warehouse system with improved fire extinguishing capabilities, and particularly a cost-effective solution for that purpose.

[0005] This object is solved by the present invention as defined in the independent claims. Preferred embodiments are defined in the dependent claims.

[0006] According to a first aspect, a vehicle for transporting a storage bin in a warehouse comprises a housing and a fire extinguisher configured to release an extinguishing agent into the housing.

[0007] It has been found that a main source of fire or a source of ignition in a warehouse or warehouse system are energised components in the warehouse system. Regularly, a warehouse system runs with electricity, so that electrical or electronic components, such as a motor, cable, accumulator (battery), or the like, are the main source of ignition (or "inflammation"). Releasing a fire extinguishing agent into the housing of the vehicle has the advantage of providing fire extinguishing means as close as possible at one of the possible sources of fire. Specifically, a vehicle for transporting storage bins regularly includes one or more motors, cables, electric and / or electronic components, a battery, and the like, all of which are possible sources of ignition and / or sources of heat generation. Thus, it may be said that the present disclosure contemplates a vehicle for a warehouse as a "moving electric cabinet" or "electric cabinet on wheels", which is equipped with a fire extinguisher.

[0008] Providing a fire extinguishing agent in close proximity to the main sources of ignition or sources of a fire thus can avoid spreading of a fire to other parts of the warehouse, particularly the bins and goods stored therein. Since the released fire extinguishing agent is within the housing of the vehicle, the fire extinguishing agent may not be spread onto regions further away from the source of ignition, as it is the case in conventional sprinkler systems. Thus, damages usually caused by such sprinkler systems can be avoided or at least reduced.

[0009] Furthermore, expensive sprinkler systems covering the entire warehouse can be omitted, which significantly reduces the installation costs of a warehouse system. The fire extinguisher of the present disclosure is on board and travels with the vehicle.

[0010] In a variant, the extinguishing agent can be in a liquid state when being released into the housing. The extinguishing agent can be configured to change to a gaseous state when reacting with the environment, such as air in the ambient environment of the vehicle.

[0011] Alternatively, the extinguishing agent can be in a gaseous state when being released into the housing. As a mere example, the extinguishing agent can be or can change to a gaseous state when being released.

[0012] A gaseous extinguishing agent can cover or surround the fire or overheated component and, hence, can reduce the amount of oxygen available for a fire. A gas distributes more easily within the housing of the vehicle and, particularly, between installed components in the interior of the housing, compared to liquid or powdery extinguishing agents. In addition, a gaseous extinguishing agent causes less or no damages to other items in the vicinity of the vehicle, such as stored items in the warehouse system.

[0013] In a variant, the fire extinguisher can comprise a tank configured to store the fire extinguishing agent, an expansion valve fluidly coupled to the tank, and a trigger mechanism. Thus, the fire extinguisher can have a simple structure, which reduces costs of the vehicle and, hence, costs of the warehouse.

[0014] In a variant, the trigger mechanism can be configured to open the expansion valve when an ambient temperature around the trigger mechanism exceeds a threshold value. As a mere example, the trigger mechanism can be a mechanical structure that changes its form with increasing temperature, while such change of its form allows opening the expansion valve. For instance, the trigger mechanism can be a metal, plastic or other material coupled to the expansion valve, which is configured to change its shape (e.g., length) with increasing temperature, thereby opening the expansion valve.

[0015] According to another example, the trigger mechanism can be a conventional heat-sensitive glass bulb containing a fluid (e.g., a gas or liquid). Due to the thermal expansion of the fluid, the glass bulb will break dependent on the ambient temperature. Different kinds of fluid in the glass bulb can be employed, so that the fluid has different characteristics, for example, depending on the ambient temperature. This allows having a variety of glass bulbs to choose from, which break at different temperatures. Therefore, the trigger mechanism can be pre-set to open the expansion valve at a desired ambient temperature.

[0016] The trigger mechanism (metal or plastic structure, or glass bulb) can be arranged to apply a pressure on the expansion valve. The expansion valve itself can be biased in the direction of the trigger mechanism. Thus, the change of shape or the breaking of the trigger mechanism allows the biased expansion valve to open, for example, by a biasing element acting on a closure element of the expansion valve.

[0017] Alternatively, the trigger mechanism can hold a moving part of the valve in a position spaced apart from a closure of the tank (e.g., a membrane, disc or similar element blocking an outlet of the tank). A biasing element acts on the moving part of the valve. Thus, once the trigger mechanism (metal or plastic structure, or glass bulb) is activated, the moving part can move towards the closure of the tank and can open the closure. As a mere example, a needle or similar sharp element can be pushed through the closure of the tank due to the biasing force acting on the moving part.

[0018] It is to be understood that the trigger mechanism can likewise move the expansion valve from a closed position to an open position directly, for example, in case of a mechanical structure configured to pull or push on the expansion valve under increasing temperature influence.

[0019] In a variant, the trigger mechanism can be configured to open the expansion valve when receiving a remote activation signal. Such activation signal can be an electric signal, including an electric current flowing through the trigger mechanism. As a mere example, the electric current can increase the temperature of the trigger mechanism, which may then directly or indirectly open the expansion valve as described above. It is to be understood that any actuator activated by the remote activation signal can be employed to trigger opening the expansion valve or to directly open the expansion valve, including an electric motor, a hydraulic or pneumatic actuator, or the like.

[0020] In a variant, the tank can be configured to store the fire extinguishing agent under pressure. Thus, a small tank can be installed in or at the vehicle, while a large amount of extinguishing agent can be released into the housing of the vehicle. This allows expanding the extinguishing agent using the expansion valve, which reduces the temperature of the extinguishing agent. Thus, the source of ignition or fire can further be cooled while releasing the extinguishing agent.

[0021] As a mere example, the fire extinguishing agent can be stored under pressure and in a liquid state. This allows expanding the extinguishing agent using the expansion valve at an even higher ratio, particularly, when changing from the liquid state to the gaseous state. Thus, the amount of gaseous extinguishing agent can be increased and the temperature of the released agent can be reduced compared to the storage of a gaseous agent in the tank.

[0022] In a variant, the extinguishing agent can be an inert gas, nitrogen, carbon dioxide or a specific fire extinguishing material such as a fluorinated ketone. As a mere example, the fire extinguishing agent can be FK-5-1-12 (also referred to as Novec 1230). As a mere example, the fire extinguishing agent can react with oxygen or change into the gaseous state when being in contact with oxygen.

[0023] In any case, the fire extinguishing agent displaces air in the housing of the vehicle and thereby deprives the fire of oxygen.

[0024] As a mere example, the extinguishing agent can be electrically non-conductive. Furthermore, the extinguishing agent, when released and forming a gaseous cloud, can have a concentration where it is non-hazardous to people.

[0025] In a variant, the fire extinguisher comprises at least an outlet arranged in an upper region of the housing. Since the released extinguishing agent will be cooler than the hot air due to a fire or overheated element, the gaseous agent will flow towards a bottom of the housing and, hence, along the source of ignition or fire, which facilitates extinguishing the fire. Furthermore, since the upper portion of a vehicle housing is regularly closed, in order to avoid particles to fall into the vehicle, arranging the outlet in an upper region of the housing facilitates an effective spreading of the released extinguishing agent in the space encased by the housing.

[0026] In a variant, the outlet of the fire extinguisher can comprise at least one nozzle configured to direct at least a portion of the extinguishing agent towards an internal component of the vehicle. As a mere example, an electric fuse, switch or battery, or the like, that has the highest risk of catching fire, can be the target of the at least one nozzle. Thus, this internal component of the vehicle will receive the released extinguishing agent first and will, hence, be cooled the most.

[0027] It is to be understood that the fire extinguisher can comprise a plurality of outlets and / or a plurality of nozzles, each of which is configured to direct a portion of the extinguishing agent towards an associated internal component of the vehicle. Thus, the interior of the housing can be divided into multiple zones, in which a fire can be extinguished.

[0028] Likewise, each outlet or nozzle or groups thereof may be provided with a respective trigger mechanism, so that the fire extinguishing agent can be released into one or more of the multiple zones of the interior of the housing individually.

[0029] In a variant, at least the tank of the fire extinguisher is arranged within the housing. This allows providing a compact vehicle having a fire extinguisher "on board". As a mere example, a dedicated room for the fire extinguisher may be provided inside of the housing. This room may be separated from other areas inside of the housing, for example by a lateral wall and / or bottom wall or other casing. In case of a leakage of the extinguishing agent or other failure of the fire extinguisher, the internal component(s) of the vehicle may not be affected or damaged.

[0030] Alternatively, the tank of the fire extinguisher can be arranged outside of the housing. This prevents any damage to an internal component in case of a leakage of the tank. Furthermore, maintenance of the fire extinguisher is much easier and, hence, more cost-effective.

[0031] In a variant, the vehicle can further comprise a safety switch configured to switch off the vehicle or at least a part thereof in case the fire extinguisher releases the extinguishing agent. As a mere example, the safety switch can be coupled to the trigger mechanism, so that activation of the trigger mechanism (opening of the expansion valve) also activates the safety switch. For instance, an electric or mechanical coupling of the trigger mechanism with the safety switch can be provided, so that activation of the trigger mechanism changes the electric or mechanical coupling. Thus, all electrical components of the vehicle can be switched off, so that all sources of ignition are shut down.

[0032] In a variant, the housing can comprise at least one opening. This allows escaping of the extinguishing agent from the housing. Particularly, since the agent will expand when being released from the tank, a closed housing would lead to an increased pressure inside of the housing. In order to avoid any damage to the housing and vehicle, the at least one opening can release the pressure.

[0033] In a variant, the at least one opening in the housing can be at a position of approximately maximum distance to the releasing means of the fire extinguisher. For instance, a distance between an outlet (such as a nozzle) of the fire extinguisher and the at least one opening shall approach a maximum, to allow the extinguishing agent to flow through the entire space encased by the housing. For instance, the at least one opening can be arranged in a bottom region of the housing, particularly, when the extinguishing agent is released in an upper portion of the housing.

[0034] In a variant, the at least one opening can be arranged in a lateral sidewall or a ceiling of the housing. This allows closing a bottom region of the housing, i.e., the housing is closed in a downward direction, particularly in the direction of the rails. Such structure of the housing allows an extinguishing agent that is heavier than air to sink towards the bottom region before escaping through the at least one opening. Thus, the (entire) space encased by the housing can be filled with the heavier extinguishing agent.

[0035] In a variant, the housing can comprise a head housing forming a top portion of the vehicle, a cantilever housing configured to extend from the head housing, and a base housing arranged below the head housing. The fire extinguisher can be configured to release the extinguishing agent in any of the head housing, cantilever housing and base housing.

[0036] As a mere example, at least a portion of the fire extinguisher can be arranged in any of the head housing, cantilever housing and base housing. For instance, at least an agent releasing portion of the fire extinguisher is arranged in the head housing or the cantilever housing, since they are forming upper regions of the vehicle.

[0037] In a variant, the housing can comprise a housing lid. The fire extinguisher can be mounted to an inner side of the housing lid. This allows easy maintenance of the fire extinguisher, for example, by releasing the housing lid to have easy access to the fire extinguisher.

[0038] In a variant, the housing can encase at least one internal component of the vehicle. Thus, the extinguishing agent is released in close proximity to the at least one internal component, which may be a source of ignition or fire.

[0039] As a mere example, the at least one internal component can comprise one or more of an electric and / or electronic component, a motor, a cable and a battery. It is to be understood that the internal components are not limited to these items, but that any other source of ignition or fire inside of the housing (and regularly required to operate the vehicle) can be considered as an internal component arranged inside of the housing.

[0040] In a variant, the vehicle can be configured to retrieve a storage bin in a warehouse (or warehouse system), the warehouse comprising a storage area adapted to accommodate a plurality of storage bins, wherein the vehicle is configured to be movable to retrieve storage bins from the storage area so that the storage bin is shiftable / movable / transportable by the vehicle through the warehouse. The storage area may accommodate a plurality of stacks of storage bins, wherein the vehicle is configured to be movable to retrieve storage bins from the plurality of stacks.

[0041] In a variant, the warehouse comprises at least one warehouse module comprising a top level arranged above the storage area, wherein the vehicle is configured to be movable at the top level, and wherein retrieving a storage bin from a respective stack of the storage area includes raising the storage bin from the stack to the top level so that the storage bin is shiftable by the vehicle along the top level.

[0042] In a variant, the vehicle can comprise a gripper configured to grip a storage bin to raise (or "while raising") the storage bin from the storage area or from a respective stack thereof and to shift (or "while shifting") the storage bin accordingly. As a mere example, the gripper can be arranged to extend beyond a main body of the vehicle so that the storage bin is arranged alongside the main body on a first vertical side of the main body.

[0043] For instance, when the storage bin is raised to the top level, the storage bin may be arranged alongside the main body. The gripper can be configured to grip a storage bin at a respective stack, so that the gripper or another component of the vehicle can raise the storage bin (e.g., to the top level). While still gripping the storage bin, the vehicle can move, so that the storage bin is shifted (e.g., along the top level) accordingly.

[0044] In a variant, the gripper can comprise a one or more clasps configured to grip the storage bin. For example, the one or more clasps can be configured to engage with the storage bin, for instance, at a respective outer side of the storage bin. As a mere example, the storage bin may have a recess or protrusion forming a handle or recessed / protruding grip of the storage bin. The one or more clasps can be configured to engage with such recess or protrusion. Furthermore, the storage bin can be a standardized storage box (e.g., Euro box), a crate for beverages, a wooden box, a standardized pallet, or the like.

[0045] In a variant, the vehicle can comprise an alternating mechanism configured to change a position of the gripper with respect to the main body so that, when a storage bin is gripped (and, for example, raised to the top level), the storage bin is arranged - in the changed position - alongside the main body on a second vertical side of the main body. In one such variant, the gripper may be telescopically extendable beyond the first vertical side of the main body and telescopically extendable beyond the second vertical side of the main body, wherein the alternating mechanism may comprise a sliding mechanism configured to alternatingly slide the gripper between a telescopic extension beyond the first vertical side of the main body and a telescopic extension beyond the second vertical side of the main body. In another such variant, the alternating mechanism may comprise a rotating mechanism configured to rotate the gripper between a rotational position in which the gripper extends beyond the first vertical side of the main body and a rotational position in which the gripper extends beyond the second vertical side of the main body. As a mere example, the rotating mechanism can be arranged at a top of the body of the vehicle. In addition, the rotating mechanism can be configured to rotate around a vertical axis and about 360° and / or about 180° in each direction.

[0046] In a variant, the vehicle can further comprise a plurality of rollers configured to move the vehicle. As a mere example, the vehicle may be configured to move on a floor of a warehouse or any other surface. For instance, the vehicle can move on the floor or surface when a storage bin is gripped by the gripper, in order to transport the storage bin accordingly.

[0047] Alternatively or additionally, the rollers may be configured to move the vehicle in one or more rails provided in a warehouse to form a dedicated path, where a vehicle shall move. Thus, instead of a free movement of the vehicle, the rollers of the vehicle engage with the one or more rails, in order to move and, hence, transport a storage bin along the rail(s).

[0048] Further alternatively or additionally, the rollers may be configured to move the vehicle at the top level of the storage module, for example. Thus, the rollers may be configured to move on a dedicated surface arranged at the top level of the storage module. As a mere example, rails may be provided at the top level or may form the top level, wherein the rollers are configured to move in such rails. As a mere example, the rails may be arranged in a grid-like manner above the stacks of storage bins, so that the vehicle is able to move along the grid, for example, along two orthogonal directions.

[0049] In a variant, the vehicle can further comprise a roller actuator configured to rotate at least one of the plurality of rollers. The roller actuator can be configured to rotate one of the rollers, a pair of rollers or even all of the plurality of rollers. Alternatively, more than one roller actuator can be implemented in the vehicle, i.e., in order to rotate more than one roller (e.g., but each roller separately).

[0050] According to a second aspect, a warehouse system comprises at least one warehouse module comprising a storage area and a top level arranged above the storage area, the storage area being adapted to accommodate a plurality of stacks of storage bins, and at least one vehicle according to the first aspect. Furthermore, the at least one vehicle is configured to be movable at the top level of the at least one warehouse module.

[0051] Thus, a warehouse system being operated with one or more vehicles as disclosed herein includes a fire extinguishing capability. Thus, the warehouse system can be installed in a short time and is very cost-effective compared to a warehouse system having a conventional sprinkler system.

[0052] In a variant, the warehouse system can further comprise a control unit configured to communicate with the at least one vehicle. The at least one vehicle can be configured to transmit a signal to the control unit indicating an increased temperature and / or fire at the vehicle. For instance, the vehicle can be equipped with a heat and / or fire detecting sensor and a communication unit configured to send the signal to the control unit of the warehouse system.

[0053] The control unit may further be configured to set a fire alarm signal. As a mere example, the at least one vehicle indicates an incident to the control unit of the warehouse system via the transmitted signal, while the control unit can set a fire alarm with respect to the entire warehouse system. For instance, the fire alarm may include a visible and / or audible signal to an operator of the warehouse system (either at the site of the warehouse system or remote depending on the location of the operator). Furthermore, the fire alarm signal can be forwarded from the control unit of the warehouse system to a fire department.

[0054] In a variant, the warehouse system comprises a plurality of vehicles, and the control unit can be configured to receive a signal from a first vehicle indicating the increased temperature and / or fire at the first vehicle, and to transmit a signal to a second vehicle indicating to the second vehicle to drive towards the first vehicle and to activate the fire extinguisher of the second vehicle. The extinguishing agent released from the fire extinguisher of the second vehicle may also be released from the housing, for example, through at least one opening in the housing. Thus, in the vicinity of the second vehicle, now close to the first vehicle, an increased amount of released extinguishing agent is present. Thus, while the vehicles are capable of self-extinguishing a fire or cooling an overheated component, the risk of the fire catching other items in the warehouse system is reduced.

[0055] Alternatively, the control unit of the warehouse system may transmit a signal to a second vehicle indicating to move away from the first vehicle. This avoids that the second vehicle catches fire from the first vehicle.

[0056] In a variant, the control unit of the warehouse system can be further configured to switch off operation of the warehouse system, once the signal from the at least one vehicle is received at the control unit. For instance, an electric supply of the warehouse system may be switched off, for example, using a security switch. Alternatively, particularly electric and / or electronic components of the warehouse system can be switched off.

[0057] The present disclosure is not restricted to the aspects and variants in the described form and order. Specifically, the description of aspects and variants is not to be understood as a specific limiting grouping of features. It is to be understood that the present disclosure also covers combinations of the aspects and their variants. Thus, each variant or optional feature can be combined with any other aspect, variant, optional feature or even combinations thereof.Brief Description of the Drawings

[0058] In the following, the present disclosure will further be described with reference to exemplary implementations illustrated in the figures, in which: Figure 1schematically illustrates a warehouse system; Figure 2schematically illustrates a perspective view of a vehicle for transporting a storage bin; Figure 3schematically illustrates a side view of a partially opened vehicle for transporting a storage bin; Figure 4schematically illustrates a further side view of the partially opened vehicle of Figure 3; and Figure 5schematically illustrates a fire extinguisher. Detailed Description

[0059] In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the present disclosure. It will be apparent to one skilled in the art that the present disclosure may be practiced in other implementations that depart from these specific details.

[0060] Figure 1 schematically illustrates a warehouse system 20 in the form of a modular storage system. Specifically, the warehouse system 20 as illustrated comprises two warehouse modules 200. As can be seen, the exemplary warehouse storage module 200 provides space for a three-dimensional arrangement of storage bins 202, wherein the storage module 200 comprises a storage area 204 and a top level 206 arranged above the storage area 204. In the storage area 204, vertical stacks 208 of storage bins 202 are arranged in a horizontal two-dimensional grid at the bottom of the storage module 200. In other words, the two-dimensional grid may extend in a longitudinal direction X and in a transverse direction Y at the bottom of the storage module 200, wherein, at each cell of the two-dimensional grid, a base for a stack 208 that may grow in the vertical direction Z may be formed. Each such space comprising the base for a stack 208 including the vertical space above the base for accommodating the bins 202 of the stack may be called a "storage cell", as referred to herein. At the top level 206, a vehicle 100 is shown which is movable (horizontally at the top level 206) in alignment with the two-dimensional grid above the respective stacks 208 to retrieve and place storage bins 202 from and to the plurality of stacks 208. A two-dimensional grid of rails 212, in which rollers 180 (Figure 2) of the vehicle 100 may engage, may form the bottom of the top level 206, which separates the top level 206 from the storage area 204. If the modules 200 are stacked, several travelling levels 206 are created, which make it possible to run several parallel storage and retrieval processes at the same time, thus significantly increasing performance.

[0061] At an outer edge of the top level 206 of the storage module 200 the at least one vehicle 100 can reach a handover point of the warehouse storage module 200, the handover point being located outside of the storage area 204. Thus, the vehicle 100 is capable of moving storage bins 202 in and out of the storage module 200. Figure 1 illustrates two handover points, but it will be understood that the warehouse system 20 is not limited to these particular handover points. Furthermore, each vehicle 100 can be equipped with a belt or rope 160 allowing the storage bin 202 to be raised and lowered, either from and to the handover point or from and to one of the plurality of stacks 208. This may include a cantilever housing 120 of the vehicle 100, which extends from a base 130 (Figure 2) of the vehicle 100, and where the belt or rope 160 is coupled to.

[0062] Figure 2 schematically illustrates a perspective view of a vehicle 100 for transporting a storage bin 202 (not illustrated in Figure 2) in a warehouse. The vehicle comprises a housing 110, 120, 130. Specifically, the vehicle 100 can comprise a base housing 130, to which rollers or wheels 180 are mounted. The base housing 130 can comprise side walls 132, 133 as well as a lid 131. As a mere example, one or more of the sidewalls 132, 133 can comprise an opening 135.

[0063] The vehicle 100 can further comprise a head housing 110 forming a head or top portion of the vehicle 100. This head housing 110 can likewise include a lid 111 and sidewalls 112, 113. A cantilever housing 120 can extend from the head housing 110, and can also comprise a lid 121 and at least one sidewall 123. The cantilever housing 110 may encase a motor 144 for the belt or rope 160. At an end of the belt or rope 160 there may be a gripper 162 configured to grip a storage bin 202. By correspondingly operating the motor 144, the storage bin 202 can be lifted and lowered by winding or unwinding the belt or rope 160, respectively.

[0064] As a mere example, the head housing 110 may be configured to rotate relative to the base housing 130 around a vertical axis. This allows turning the cantilever housing 120, and hence a storage bin 202 gripped by the gripper 162, around the base housing 130, for example, in order to bring the storage bin 202 above a different stack 208 or over the outer edge of the warehouse module 200, such as to reach a handover point.

[0065] Furthermore, each wheel 180 may be configured to rotate around a vertical axis (particularly to be rotated by an actuator), in order to control a direction into which the vehicle 100 moves. Thus, the vehicle 100 can particularly move in the X and Y directions at the top level 206.

[0066] Turning to Figures 3 and 4, schematically illustrating respective side views of the vehicle 100, the vehicle 100 can further comprise a fire extinguisher 150 configured to release an extinguishing agent 155 (Figure 5). In order to illustrate the fire extinguisher 150 and further internal components of the vehicle 100, Figures 3 and 4 illustrate the vehicle 100 in a partially open state, where portions of the sidewalls 132, 133 are removed. The sidewalls 132, 133 are only shown at the corners of the vehicle 100. With additional reference to Figure 5, the fire extinguisher 150 can comprise a tank 151 configured to store the fire extinguishing agent 155, an expansion valve 152 fluidly coupled to the tank 151, and a trigger mechanism 153.

[0067] As can be derived from Figures 3 and 4, the fire extinguisher is configured to release the extinguishing agent 155 into the housing 110, 120, 130. As a mere example, an outlet 154 of the fire extinguisher 150 is arranged in an interior space of the housing 110, 120, 130. Thus, the interior space of the housing 110, 120, 130 is flooded with the fire extinguishing agent.

[0068] For instance, the trigger mechanism 153 can be configured to open the expansion valve 152 when an ambient temperature around the trigger mechanism 153 exceeds a threshold value and / or to open the expansion valve 152 when receiving a remote activation signal.

[0069] The trigger mechanism 153 can change its shape or form due to an increasing ambient temperature. When coupled to the expansion valve 152 and / or a closure (not illustrated) of the tank 151, the trigger mechanism 153 can open the valve 152 and / or tank 151 to release the agent 155 from the tank 151. While the trigger mechanism 153 may be made from a material changing its shape or form due to the increasing ambient temperature, it may likewise burst at a pre-set or higher temperature. As a mere example, a glass bulb (not illustrated) including a fluid may be provided, wherein a characteristic of the fluid is a particular expansion ratio depending on the temperature, which increases the pressure in the glass bulb to a certain degree, until the glass bulb bursts at the pre-set temperature. Different fluids can be employed to have glass bulbs bursting at different pre-set temperatures.

[0070] The extinguishing agent 155 is stored in a gaseous state or a liquid state in the tank 151. Preferably, the extinguishing agent 155 is stored under pressure, and is in a gaseous state when being released or converts / changes into the gaseous state when reacting with the environment, such as air, oxygen or the like. Thus, the gaseous agent 155 expands in the interior space of the housing 110, 120, 130 and extinguishes any fire. Alternatively or additionally, due to the expansion of the agent 155, a cold gas surrounds any overheated component (source of ignition), so that such component is cooled and a fire may be prevented (even before it starts). Furthermore, the extinguishing agent can be stored in a liquid state in the tank 151. This increases the expansion ratio of the agent 155 when being released from the outlet / nozzle 154, and hence further cools the agent 155 when being released.

[0071] The fire extinguisher 150 can further comprise at least one nozzle 154 configured to direct at least a portion of the extinguishing agent 155 towards an internal component 140 of the vehicle 100. As illustrated in Figure 5, the extinguishing agent 155 can be released in two opposite directions from the nozzle 154. It is to be understood that the extinguishing agent 155 can be released in any direction and in the form of any number of streams (in different directions).

[0072] The outlet 154 of the fire extinguisher 150 can be arranged in an upper region of the housing 110, 120, 130. Thus, the cool gaseous agent 155 sinks in the housing 110, 120, 130 and floods the housing 110, 120, 130 from top to bottom. As a mere example, the gaseous agent 155 can be released through an opening 135 (Figure 2) or 136 (Figure 3) arranged in a bottom region of the housing 130. Thus, the gaseous agent 155 is forced to flow through the (entire) interior space of the housing 110, 120, 130 from top to bottom. Alternatively, the housing 110, 120, 130 may have one or more openings only in a top region of the vehicle, so that a fire extinguishing agent 155 that is heavier than air can fill the space encased by the housing 110, 120, 130.

[0073] It will be understood that several outlets / nozzles 154 can be provided inside of the housing 110, 120, 130. Likewise, a plurality of fire extinguishers 150, i.e., including a separate tank 151, can be provided inside of the housing 110, 120, 130. This allows flooding the interior of the housing 110, 120, 130 more effectively or in one or more of multiple extinguishing zones.

[0074] While Figures 3 and 4 illustrates the fire extinguisher 150, and particularly its tank 151, arranged inside of the housing 110, 120, 130, at least the tank 151 of the fire extinguisher 150 can be arranged outside of the housing 110, 120, 130 (not illustrated), for example. This facilitates maintenance of the tank 151 as it may be more easily reached for such maintenance.

[0075] Optionally, at least the tank 151 or the entire fire extinguisher 150 can be mounted to an inner side of a housing lid 111, 121. Thus, the fire extinguisher 150 can be easily reached by removing the lid 111, 121, for example, for maintenance of the fire extinguisher 150.

[0076] The housing 110, 120, 130 encases at least one internal component 140 of the vehicle 100 used to operate the vehicle 100. Only exemplarily, Figures 2 to 4 illustrate electric components 141, such as fuses, switches, or terminal blocks, as well as electronic components 142, such as a control unit or electrical cabinet component, as well as a battery 149, as well as a motor 144 for winding and unwinding the rope or belt 160, as well as a motor 146 for turning wheels 180. Each of these internal components 140 can be a source of ignition or fire. By arranging at least the outlet 154 of the fire extinguisher 150 above such internal components and / or by directing a stream of agent 155 from a nozzle 154 onto such internal component 140, an overheated component 140 can be cooled down and any fire can be extinguished.

[0077] As a mere example, the battery 149 can include lithium iron phosphate or the like, which allows forming a non-flammable or at least less-flammable energy storage.

[0078] The vehicle 100 can further comprise a safety switch 160 (Figure 4) configured to switch off the vehicle 100 or at least a part thereof in case the fire extinguisher 150 releases the extinguishing agent 155. For instance, the trigger mechanism 153 can further be configured to also trigger a signal to a control unit 142, which activates the safety switch 160 to shutoff the vehicle 100.

[0079] Alternatively or additionally, a temperature sensor (not illustrated) may be provided in the inner space of the housing 110, 120, 130. If the temperature sensor indicates a temperature above a threshold value, a control unit 142 of the vehicle 100 may activate the safety switch 160. In addition, the control unit 142 can also activate the trigger mechanism 153. As a mere example, an electric current may be applied to the trigger mechanism 153 increasing its temperature, so that it triggers the release of the fire extinguishing agent 155 from the tank 151.

[0080] Furthermore, the warehouse system 20 or one or more of the warehouse modules 200 can include a control unit 250 configured to communicate with the at least one vehicle 100. The at least one vehicle 100 can transmit a signal to the control unit 250 indicating an increased temperature and / or fire at the vehicle 100. The control unit 250 can then set a fire alarm signal, for example, to an operator or fire department.

[0081] Likewise, the control unit 250 can further be configured to control one or more other vehicles 100, in case such fire signal has been sent from a first vehicle 100. The other vehicles 100 can be either directed to approach the first vehicle 100 and to activate their respective fire extinguishers 150, so that a group of fire extinguishing vehicles is gathered together. Alternatively, the other vehicles 100 are directed to drive away from the first vehicle 100 (being overheated or having a fire).

[0082] It is believed that the advantages of the technique presented herein will be fully understood from the foregoing description, and it will be apparent that various changes may be made in the form, constructions and arrangement of the exemplary aspects thereof without departing from the scope of the disclosure or without sacrificing all of its advantageous effects. Because the technique presented herein can be varied in many ways, it will be recognized that the disclosure should be limited only by the scope of the claims that follow.

Examples

Embodiment Construction

[0059]In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the present disclosure. It will be apparent to one skilled in the art that the present disclosure may be practiced in other implementations that depart from these specific details.

[0060]Figure 1 schematically illustrates a warehouse system 20 in the form of a modular storage system. Specifically, the warehouse system 20 as illustrated comprises two warehouse modules 200. As can be seen, the exemplary warehouse storage module 200 provides space for a three-dimensional arrangement of storage bins 202, wherein the storage module 200 comprises a storage area 204 and a top level 206 arranged above the storage area 204. In the storage area 204, vertical stacks 208 of storage bins 202 are arranged in a horizontal two-dimensional grid at the bottom of the storage module 200. In other words, the two-dimensional grid may extend in a...

Claims

1. A vehicle (100) for transporting a storage bin (202) in a warehouse, the vehicle (100) comprising: a housing (110, 120, 130); and a fire extinguisher (150) configured to release an extinguishing agent (155) into the housing.

2. The vehicle (100) of claim 1, wherein the extinguishing agent (155) is in a liquid state when being released into the housing (110, 120, 130), and preferably the extinguishing agent (155) is configured to change to a gaseous state when reacting with the environment.

3. The vehicle (100) of claim 1 or 2, wherein the fire extinguisher (150) comprises a tank (151) configured to store the fire extinguishing agent (155), an expansion valve (152) fluidly coupled to the tank, and a trigger mechanism (153).

4. The vehicle (100) of claim 3, wherein the trigger mechanism (153) is configured to open the expansion valve (152) when an ambient temperature around the trigger mechanism exceeds a threshold value and / or to open the expansion valve (152) when receiving a remote activation signal.

5. The vehicle (100) of claim 3 or 4, wherein the tank (151) is configured to store the fire extinguishing agent under pressure, preferably under pressure and in a liquid state.

6. The vehicle (100) of one of claims 3 to 5, wherein the fire extinguisher (150) comprises at least an outlet (154) arranged in an upper region of the housing (110, 120, 130), and wherein, preferably, the outlet (154) of the fire extinguisher (150) comprises at least one nozzle configured to direct at least a portion of the extinguishing agent (155) towards an internal component (140) of the vehicle.

7. The vehicle (100) of one of claims 3 to 6, wherein at least the tank (151) of the fire extinguisher (150) is arranged within the housing (110, 120, 130), or wherein the tank (151) of the fire extinguisher (150) is arranged outside of the housing (110, 120, 130).

8. The vehicle (100) of one of claims 1 to 7, further comprising: a safety switch (160) configured to switch off the vehicle (100) or at least a part thereof in case the fire extinguisher (150) releases the extinguishing agent.

9. The vehicle (100) of one of claims 1 to 8, wherein the housing (110, 120, 130) comprises at least one opening (135, 136).

10. The vehicle (100) of one of claims 1 to 9, wherein the housing comprises a head housing (110) forming a top portion of the vehicle (100), a cantilever housing (120) configured to extend from the head housing (110), and a base housing (130) arranged below the head housing (110), and wherein at least a portion of the fire extinguisher (150) is arranged in the head housing (110) or the cantilever housing (120).

11. The vehicle (100) of one of claims 1 to 10, wherein the housing comprises a housing lid (111, 121), and wherein the fire extinguisher (150) is mounted to an inner side of the housing lid.

12. The vehicle (100) of one of claims 1 to 11, wherein the housing (110, 120, 130) encases at least one internal component (140) of the vehicle (100), and wherein, preferably, the at least one internal component (140) comprises one or more of an electric and / or electronic component (141, 142), a motor (144, 146) and a battery (148).

13. The vehicle (100) of one of claims 1 to 12, wherein the vehicle is configured to retrieve a storage bin (202) in a warehouse module (200), the warehouse module (200) comprising a storage area (204) and a top level (206) arranged above the storage area (204), the storage area (204) being adapted to accommodate a plurality of stacks (208) of storage bins (202), wherein the vehicle (100) is configured to be movable at the top level (206) to retrieve storage bins (202) from the plurality of stacks (208), wherein retrieving a storage bin (202) from a respective stack (208) includes raising the storage bin (202) from the stack (208) to the top level (206) so that the storage bin (202) is shiftable by the vehicle (100) along the top level (206).

14. A warehouse system (20), comprising: at least one warehouse module (200) comprising a storage area (204) and a top level (206) arranged above the storage area (204), the storage area (204) being adapted to accommodate a plurality of stacks (208) of storage bins (202); at least one vehicle (100) according to one of claims 1 to 13, wherein the at least one vehicle (100) is configured to be movable at the top level (206) of the at least one warehouse module (200).

15. The warehouse system (20) of claim 11, further comprising: a control unit (250) configured to communicate with the at least one vehicle (100), wherein the at least one vehicle (100) can transmit a signal to the control unit (250) indicating an increased temperature and / or fire at the vehicle (100), and the control unit (250) is further configured to set a fire alarm signal.

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