Patent Description:
A door entrance system typically is used for allowing people to enter and leave public buildings such as stores, offices, garages and museums etc., where a large number of persons pass through each day. Buildings in areas with high pollution can have problems with polluted air entering into the buildings and the door entrance system is one of the openings in the buildings where pollution enters, since the doors of the door entrance system is opened and closed frequently.

<CIT> discloses an entrance system with at least two motor driven door elements which are movable independently from each other. The door elements may be independently controlled based on a preselected criteria.

The pollution can for instance relate to buildings in cities with general smog problems, building located next to roads with high traffic or buildings located close to areas with a high concentration of allergenic particles (or other particles) that enters into the building. To create a sustainable environment for the people working and living in such buildings there is thus a need for such polluted air to be kept out of, or at least reducing the amount entering the building via the door entrance system.

Further, buildings in areas with a temperature difference between the indoor temperature of a building and the outdoor temperature, colder or hotter, can have problems with that energy in the air from the outdoors is mixed with the indoor air, i.e. the indoor air is heated or cooled, and the door entrance system is one of the openings in the buildings where the energy is transferred since the doors of the door entrance system is opened and closed frequently. To reduce the energy consumption of buildings that is used to temper the air in the buildings, the energy transferred from the outdoor air to and from the indoor air should be as low as possible. To create a sustainable environment for the people working and living in such buildings and to reduce the energy consumption, there is thus a need to reduce the energy in the air that is transferred between the indoors and outdoors of the door entrance system of a building.

An object of the present disclosure is to provide a door entrance system, which seek to mitigate, alleviate, or eliminate one or more of the above-identified deficiencies in the art and disadvantages singly or in any combination.

An object of the present disclosure is to provide a door entrance system that enables an improved indoor climate that is safeguarded against unwanted air infiltration and enabling to take reduce the energy consumption of a building.

An object of the present disclosure is to provide a door entrance system that reduces the amount of polluted air entering through the door entrance system from one area into another area that the door entrance system is operated between.

An object of the present disclosure is to provide a door entrance system that reduces the amount of hot or cold air entering through the door entrance system from one area into another area that the door entrance system is operated between.

In this disclosure, a solution to the problem outlined above is proposed. In the proposed solution, a door entrance system for regulating the access between a first area and a second area is disclosed. The door entrance system comprise a first opening configured to be connected to the first area, a second opening configured to be connected to the second area and a revolving door comprising two or more wings, wherein the revolving door is positioned between the first and second opening and configured to rotate the two or more wings to control access between the first and second area through the first and second opening and the door entrance system further comprise a first door leaf moveably between a first open position and a second open position to regulate a size/width of the first opening, the door entrance system further comprising a control unit connected to the first door leaf and to a first air sensor configured to measure parameters of the air in the first area, wherein the control unit is configured to move the first door leaf between the first and second open position to regulate the size of the first opening at least based on input from the first air sensor, wherein the control unit is connected to a second air sensor configured to measure parameters of the air in the second area and is configured to move the first door leaf between the first and second open position to regulate the size of the first opening at least based on input from the first air sensor and/or the second air sensor.

By the door entrance system according to the above, air from the first area is restricted to enter into the second area by reducing the width of the first opening and thereby is also pollution, hot/cold air, humid air from the first area restricted to enter via the door entrance system and affect the second area. The width could be reduced when the need is high and increased again when there is a low need and/or when other parameters such as the amount of persons passing through the door entrance system is high and there is a need of the full capacity, i.e. the full width of the opening, of the door entrance system. A further advantage is that the door entrance system could be used in enhancing the air quality of a building in an efficient and robust way. A further advantage is that the door entrance system could be used in lowering the energy consumption of a building in an efficient and robust way. By reducing the width of the opining the time of that air in the revolving door could be mixed with and/or transferred to the first and second area <NUM>, is reduced.

According to an aspect the door entrance system comprise a second door leaf moveably between a first open position and a second open position to regulate a size of the second opening.

According to an aspect the first and/or second door leaf is slideably moveably between the first open position and the second open position.

According to an aspect the first air sensor is configured to measure one or more parameters of the temperature, the wind direction, the humidity, the amount of pollution and the speed of the air in the first area.

According to an aspect the second air sensor is configured to measure one or more parameters of the temperature, the wind direction, the humidity, the amount of pollution and the speed of the air in the second area.

According to an aspect the control unit is connected to the revolving door and configured to regulate the rotation of the at least two wings at least based on input from the first and/or second air sensor.

According to an aspect the revolving door comprise four of more wings and the control unit is configured to rotate the wings of the revolving door in full turns. Put in another way the wings is turned in even numbers of <NUM>°.

According to an aspect the door entrance system comprise a first arc shaped wall at a side of the first and second opening and a second arc shaped wall at an other side of the first and second opening.

According to an aspect an inner end of the first and second arc shaped wall define the first opening and an outer end of the first and second arc shaped wall define the second opening.

According to an aspect the first and second arc shaped wall is at least partly hollow and the first and second door leaf is configured to at least partly be positioned in a hollow part of the first and/or second arc shaped wall.

According to an aspect the first and/or second door leaf is moveably to a third closed position to close the first and/or second opening.

According to an aspect the first opening is open between <NUM>- <NUM>% of its width when the first door leaf is positioned in the first open position and the first opening is open between <NUM>-<NUM>% of its width when the first door leaf is positioned in the second open position.

According to an aspect the second opening is open between <NUM>- <NUM>% of its width when the second door leaf is positioned in the first open position and the second opening is open between <NUM>-<NUM>% of its width when the second door leaf is positioned in the second open position.

In this disclosure, a further solution to the problem outlined above is proposed. In the proposed solution, a method for regulating a door entrance system comprising the steps of measuring, in the first air sensor, parameters of the air in the first area, comparing, in the control unit, the parameters of the air in the first area with pre-set values of the parameters in the control unit, and regulating the width of the first opening and/or second opening if the parameters of the air in the first area is below or above the pre-set values of the parameters, the method further comprise the steps of measuring, in the second air sensor, parameters of the air in the second area, comparing, in the control unit, parameters of the air in the first area with parameters of the air in the second area, and regulating the width of the first opening and/or second opening if the parameters of the air in the first area is below or above the pre-set values of the parameters.

All references to "a/an/the [element, device, component, means, etc.]" are to be interpreted openly as referring to at least one instance of said element, device, component, means, etc., unless explicitly stated otherwise. Further, by the term "comprising" it is meant "comprising but not limited to" throughout the application.

The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the example embodiments and aspects.

Aspects of the present disclosure will be described more fully hereinafter with reference to the accompanying figures. The assembly disclosed herein can, however, be realized in many different forms and should not be construed as being limited to the aspects set forth herein.

The present invention relates to door entrance systems that is mounted in buildings and that allows people to enter and leave the building in an easy and efficient manner. Further, the present invention relates to door entrance systems that enables low energy transfer between the two sides of the entrance systems and that enables a low energy consumption in heating and/or cooling a building. The present invention also relates to door entrance systems which enables a low transfer of air between the two sides of the entrance system and that enables a low transfer of polluted air into the building/room that the entrance system is located at.

In <FIG> a door entrance system <NUM> is disclosed. The door entrance system <NUM> is arranged in a building <NUM>. The building <NUM> is located close to a road <NUM> where vehicles <NUM> pass by. The building <NUM> is also located close to trees <NUM>, which at some parts of the year releases particles in the form of pollen.

The door entrance system <NUM> is mounted in the building <NUM> and connects a first area <NUM> and a second area <NUM>. The first area <NUM> is according to an aspect the outside <NUM> of the building and the second area <NUM> is the inside <NUM> of the building <NUM>. According to an aspect the door entrance system <NUM> is according to an aspect arranged inside a building <NUM> and the first and second areas <NUM>, <NUM> are different rooms or areas in the building <NUM>.

The first area <NUM> comprise air A with a number of different parameters. The second area <NUM> also comprise air A with a number of different parameters. The parameters of the air A is according to an aspect the temperature of the air. The parameters of the air A is according to an aspect the humidity of the air. The parameters of the air A is according to an aspect the speed of the air, i.e. the wind speed of the air. The parameters of the air A is according to an aspect the amount of pollution in the air. The parameters of the air A is according to an aspect the amount of particles in the air. The parameters of the air A is according to an aspect the direction of the air, i.e. the wind direction.

When the first area <NUM> is the outside, the parameters of the air are the parameters of the outside air A. When the second area <NUM> is the inside of the building, the parameters are parameters of the parameters of the air A the building. The parameters of the air A in the first and second area <NUM>, <NUM> depends on many different things such as weather, temperature, wind and ventilation systems. However, the parameters of the air in the first and second area <NUM>, <NUM> also depends on the number of persons passing or entering the door entrance system <NUM>, elevators moving in the building <NUM> etc. The parameters of the air in the first and second area <NUM>, <NUM> thus constantly changes in front of the door entrance system <NUM>.

The door entrance system <NUM> comprises, as disclosed in <FIG>, a first opening <NUM>, a second opening <NUM>, a revolving door <NUM> and a first door leaf <NUM>. The first opening <NUM> is configured to be connected to the first area <NUM>, as is disclosed in <FIG>. The second opening <NUM> is configured to be connected to the second area <NUM>, as is disclosed in <FIG>. The revolving door <NUM> comprising two or more wings <NUM>. According to an aspect the revolving door <NUM> is a two winged <NUM> revolving door <NUM>, i.e. the revolving door <NUM> comprise two wings <NUM> as disclosed in <FIG>. According to an aspect the revolving door <NUM> is a three winged <NUM> revolving door <NUM>, i.e. the revolving door <NUM> comprise three wings <NUM> as disclosed in <FIG>. According to an aspect the revolving door <NUM> is a four winged <NUM> revolving door <NUM>, i.e. the revolving door <NUM> comprise four wings <NUM> as disclosed in <FIG> and <FIG>.

The revolving door <NUM> is positioned between the first and second opening <NUM>, <NUM>. Put in another way, a third area <NUM> is located between the first and second openings <NUM>, <NUM> and the revolving door <NUM> is positioned in said third area. The revolving door <NUM> is configured to rotate the wings <NUM>. By controlling the rotation of the wings <NUM> the entrance system can control the access between the first and second area <NUM>, <NUM> through the first and second opening <NUM>, <NUM>. If there are a large amount of people that would like to enter through the entrance system <NUM>, the speed of the rotation of the wings <NUM> could be increased.

The third area <NUM> is an area between the first area <NUM> and the second area <NUM>. According to an aspect the third area <NUM> is a vestibule or a hall in the door entrance system <NUM>. According to an aspect the third area <NUM> comprises the first opening <NUM> and the second opening <NUM>. The first opening <NUM> is configured to be connected to the first area <NUM>. The second opening <NUM> is configured to be connected to the second area <NUM> to connect the door entrance system <NUM> to the first area <NUM>. When a person in the first area <NUM> enters into the second area <NUM> via the door entrance system <NUM>, the person passes through the first opening <NUM> into the third area <NUM> and the revolving door <NUM> and thereafter leaves the third area <NUM> by passing through the second opening <NUM> and entering into the second area <NUM>. The door entrance system <NUM> is also suitable for persons to pass through the door entrance system <NUM> in the opposite direction, i.e. from the second area <NUM> to the first area <NUM>. Put in another way, the door entrance system <NUM> is configured to assist persons to pass it in both directions.

The first and second area <NUM>, <NUM> are according to an aspect the area directly in front of the first and second opening <NUM>, <NUM>. The size of the first and second areas could vary from different systems and could be set/adjusted based on the location at which the door entrance system is installed and its surroundings.

The first door leaf <NUM> is moveably between a first open position O1 and a second open position O2 to regulate a width W of the first opening <NUM>. By width is meant the size of the opening that a person that intends to walk through the entrance system <NUM> enters into or leaves through the first opening <NUM>. The width W is according to an aspect the distance between one end of the first opening <NUM> and the first door leaf <NUM>. The width W is according to an aspect the arc distance between one end of the first opening and the first door leaf <NUM>. According to an aspect the radius of the arc is corresponding to the radius of the revolving door <NUM>. The opening <NUM> is open in both the first and second open positions O1, O2 of the first door leaf <NUM>. The first door leaf <NUM> does not close the opening when it is moved between the first open position O1 and the second open position O2, it only reduces or increases the width W of the first opening <NUM>. The first door leaf <NUM> could be positioned in any positions between the first open position O1 and the second open position O2.

According to an aspect the door entrance system <NUM> further comprise a second door leaf <NUM>. The second door leaf <NUM> is moveably between a first open position O1 and a second open position O2 to regulate a size W of the second opening <NUM>. By width is meant the size of the opening that a person that intends to walk through the entrance system <NUM> enters into or leaves through the second opening <NUM>. The width W is according to an aspect the distance between one end of the second opening and the second door leaf <NUM>. The width W is according to an aspect the arc distance between one end of the second opening <NUM> and the second door leaf <NUM>. According to an aspect the radius of the arc is corresponding to the radius of the revolving door <NUM>. The opening <NUM> is open in both the first and second open positions O1, O2 of the second door leaf <NUM>. The second door leaf <NUM> does not close the opening when it is moved between the first open position O1 and the second open position O2, it only reduces or increases the width W of the second opening <NUM>. The second door leaf <NUM> could be positioned in any positions between the first open position O1 and the second open position O2.

The term first and second opening position O1, O2 is used in relation to the positions of the first door leaf <NUM> and the second door leaf <NUM>. This is used to better describe the function of the first and second door leaf <NUM>, <NUM> in a more clear way. The first and the second open position O1, O2 of the first door leaf <NUM> is not the same actual position as the first and second open position O1, O2 of the second door leaf <NUM>, however, they are corresponding positions in the respective first and second opening <NUM>, <NUM>. The first and the second door leaf <NUM>, <NUM> are according to an aspect moved in a synchronized way. Put in another way, the first and second door leaf <NUM>, <NUM> are moved in the corresponding manner between their corresponding first and the second open position O1, O2.

According to an aspect the first door leaf <NUM> is connected to the first opening <NUM>. According to an aspect the first door leaf <NUM> is positioned at the first opening <NUM>. According to an aspect the second door leaf <NUM> is connected to the second opening <NUM>. According to an aspect the second door leaf <NUM> is positioned at the second opening <NUM>.

According to an aspect the door entrance system <NUM> comprise a control unit <NUM> and a first air sensor <NUM>, as is disclosed in <FIG>. The control unit <NUM> is connected to the first door leaf <NUM> and to the first air sensor <NUM>. The first air sensor <NUM> is configured to measure parameters of the air A in the first area <NUM>. The control unit <NUM> is configured to receive input from the first air sensor <NUM> corresponding to the obtained parameters of the air A in the first area <NUM>. The control unit is configured to move the first door leaf <NUM> between the first and second open position O1, O2 to regulate the size W of the first opening <NUM> at least based on input from the first air sensor <NUM>. According to an aspect the control unit <NUM> reduces the width of the first opening <NUM> if the temperature of the air in the first area <NUM> is below a pre-set value by moving the first door leaf <NUM> from the first open position O1, as is disclosed in <FIG> and <FIG>, towards the second open position O2. According to an aspect the control unit <NUM> reduces the width W of the first opening <NUM> more if the temperature of the air A is below a further pre-set value until it has moved the first door leaf <NUM> to the second open position O2, as is disclosed in <FIG> and <FIG>.

According to an aspect the control unit <NUM> reduces the width of the first opening <NUM> if the humidity of the air in the first area <NUM> is above a pre-set value by moving the first door leaf <NUM> from the first open position O1, as is disclosed in <FIG> and <FIG>, towards the second open position O2. According to an aspect the control unit <NUM> reduces the width W of the first opening <NUM> more if the humidity of the air A is above a further pre-set value until it has moved the first door leaf <NUM> to the second open position O2, as is disclosed in <FIG> and <FIG>. The control unit <NUM> according to an aspect reduces the width W of the first opening <NUM> more if it rains more in the first area <NUM>.

According to an aspect the control unit <NUM> reduces the width of the first opening <NUM> if the wind speed of the air in the first area <NUM> is above a pre-set value by moving the first door leaf <NUM> from the first open position O1, as is disclosed in <FIG> and <FIG>, towards the second open position O2. According to an aspect the control unit <NUM> reduces the width W of the first opening <NUM> more if the wind speed of the air A is above a further pre-set value until it has moved the first door leaf <NUM> to the second open position O2, as is disclosed in <FIG> and <FIG>. The control unit <NUM> according to an aspect reduces the width W of the first opening <NUM> more if it rains more in the first area <NUM>.

According to an aspect the control unit <NUM> increases the width W of the first opening <NUM> if the parameters of the air A in the first area <NUM> goes back in the opposite direction, i.e. if the temperature increases, the air becomes more dry, if it stops to rain or if the wind speed is reduced.

The control unit is according to an aspect configured to move the first door leaf <NUM> between the first and second open position <NUM>, <NUM> to regulate the size W of the first opening <NUM> also based on the number of persons that is entering and leaving the entrance door system <NUM>. If a large number of persons is moving through the entrance system <NUM>, it could in some cases not be efficient to reduce the width of the first opening <NUM>.

According to an aspect the door entrance system <NUM> comprise a second air sensor <NUM>. The second air sensor <NUM> is connected to the control unit <NUM>. The second air sensor <NUM> is configured to measure parameters of the air A in the second area <NUM>. According to an aspect the control unit is configured to move the first door leaf <NUM> between the first and second open position O1, O2 to regulate the size W of the first opening <NUM> at least based on input from the first air sensor <NUM> and the second air sensor <NUM>. According to an aspect the control unit is configured to move the first door leaf <NUM> between the first and second open position O1, O2 to regulate the size W of the first opening <NUM> at least based on input from the second air sensor <NUM>.

According to an aspect the control unit <NUM> reduces the width of the first opening <NUM> if a difference of the temperature of the air in the first area <NUM>, obtained by the first sensor, in relation to the temperature of the air in the second area <NUM>, obtained by the second sensor <NUM>, is larger than a pre-set value, by moving the first door leaf <NUM> from the first open position O1, as is disclosed in <FIG> and <FIG>, towards the second open position O2. According to an aspect the control unit <NUM> reduces the width W of the first opening <NUM> more if the difference in temperature of the air A in the first and second area <NUM>, <NUM> is larger than a further pre-set value. This could be continued until the control unit <NUM> has moved the first door leaf <NUM> to the second open position O2, as is disclosed in <FIG> and <FIG>.

According to an aspect the control unit <NUM> reduces the width of the first opening <NUM> if the humidity of the air in the first area <NUM> is above a pre-set value in comparison to the humidity of the air in the second area <NUM> by moving the first door leaf <NUM> from the first open position O1, as is disclosed in <FIG> and <FIG>, towards the second open position O2. According to an aspect the control unit <NUM> reduces the width W of the first opening <NUM> more if the difference in humidity of the air A in the first and second area <NUM>, <NUM> are more than a further pre-set value until it has moved the first door leaf <NUM> to the second open position O2, as is disclosed in <FIG> and <FIG>. The control unit <NUM> according to an aspect reduces the width W of the first opening <NUM> more if it rains more in the first area <NUM>.

By regulating the width W of the first opening <NUM> based on parameters from both sides of the door entrance system, i.e. in the first and second area, the width W of the first opening <NUM> could be regulated to reduce the energy transfer from the first area <NUM> and the second area <NUM> in an efficient way. In some cases it could even be desirable to have a high energy transfer through the door entrance system <NUM>, for instance if it is too hot on one side of the door entrance system <NUM> and it is colder on the other side of the door entrance system <NUM>.

The control unit <NUM> is according to an aspect configured to move the first door leaf <NUM> between the first and second open position O1, O2 to regulate the size W of the first opening <NUM> also based on the number of persons that is entering and leaving the entrance door system <NUM>. If a large number of persons is moving through the entrance system <NUM> it could in some cases not be efficient to reduce the width of the first opening <NUM>.

According to an aspect the control unit <NUM> is configured to move the second door leaf <NUM> between the first and second open position <NUM>, <NUM> to regulate the size W of the second opening <NUM> at least based on input from the first air sensor <NUM>. According to an aspect the control unit <NUM> is configured to move the second door leaf <NUM> between the first and second open position O1, O2 to regulate the size W of the second opening <NUM> at least based on input from the first air sensor <NUM> and the second air sensor <NUM>. According to an aspect the control unit <NUM> is configured to move the second door leaf <NUM> between the first and second open position <NUM>, <NUM> to regulate the size W of the second opening <NUM> at least based on input from the second air sensor <NUM>.

According to an aspect the second door leaf <NUM> is move in a corresponding way as has been described in accordance with the first door leaf <NUM> above.

According to an aspect the control unit <NUM> is configured to move the first door leaf <NUM> and the second door leaf <NUM> between the first and second open positions O1, O2 in a synchronous way. According to an aspect the control unit <NUM> is configured to move the first door leaf <NUM> a distance between the first and second open position O1, O2 and the second door leaf <NUM> a different distance between the first and second open position O1, O2.

According to an aspect the first opening <NUM> is open between <NUM>- <NUM>% of its width W when the first door leaf <NUM> is positioned in the first open position O1. According to an aspect the first opening <NUM> is open between <NUM>-<NUM>% of its width W when the first door leaf <NUM> is positioned in the second open position O2.

According to an aspect the second opening <NUM> is open between <NUM>- <NUM>% of its width W when the second door leaf <NUM> is positioned in the first open position O1. According to an aspect the second opening <NUM> is open between <NUM>-<NUM>% of its width W when the second door leaf <NUM> is positioned in the second open position O2.

According to an aspect the first door leaf <NUM> is slideably moveably between the first open position O1 and the second open position O2. According to an aspect the first and second door leaf <NUM>, <NUM> is slideably moveably between the first open position O1 and the second open position O2. According to an aspect the second door leaf <NUM> is slideably moveably between the first open position O1 and the second open position O2. According to an aspect the first door leaf <NUM> has an arc shape. According to an aspect the second door leaf <NUM> has an arc shape.

According to an aspect first air sensor <NUM> is configured to measure one or more parameters of the temperature, the humidity, the amount of pollution and the speed of the air A in the first area <NUM>. According to an aspect the first sensor <NUM> is a temperature sensor, a humidity sensor, a pollution sensor, a particle sensor or a wind sensor or any combination thereof. According to an aspect the first sensor <NUM> is a wind direction sensor.

According to an aspect the first sensor <NUM> is a traffic intensity sensor. According to an aspect the traffic intensity sensor is configured to receive input from other sensors and make a priority of the received parameters. Put in another way the traffic intensity sensor obtains information from the other sensors and make a priority regarding which of the parameters that should be more important or prioritized as input in regard to others. As an example, the traffic intensity sensor is adapted to make a priority if the energy consumption should be higher prioritized than the amount of pollution. As an example, the traffic intensity sensor is adapted to make a priority if the energy consumption and or the amount of pollution should be higher prioritized than the capacity of the door entrance system <NUM>.

According to an aspect the second air sensor <NUM> is configured to measure one or more parameters of the temperature, the humidity, the amount of pollution and the speed of the air A in the second area <NUM>. According to an aspect the first sensor <NUM> is a temperature sensor, a humidity sensor, a pollution sensor, a particle sensor or a wind sensor or any combination thereof. According to an aspect the first sensor <NUM> is a wind direction sensor. According to an aspect the second sensor <NUM> is a traffic intensity senson. According to an aspect the traffic intensity sensor is configured to receive input from other sensors and make a priority of the received parameters. Put in another way the traffic intensity sensor obtains information from the other sensors and make a priority regarding which of the parameters that should be more imoportant as input in regard to others. As an example the traffic intensity sensor is adapted to make a priority if the energy consumption should be higher prioritized than the amount of pollution.

The first air sensor <NUM> is according to an aspect mounted on/connected to/at the door wing <NUM> of the revolving door <NUM> or the first door leaf <NUM> of the door entrance system <NUM>. The first air sensor <NUM> is according to an aspect mounted on/connected to/at a frame of the door entrance system <NUM>. The first air sensor <NUM> is according to an aspect mounted at a distance from the first opening <NUM> and comprises a wireless connection. According to an aspect the first air sensor <NUM> comprises a wireless connection. According to an aspect the first air sensor <NUM> is further comprised in a ventilation system or air conditioning system of the building <NUM>.

The second air sensor <NUM> is according to an aspect mounted on/connected to a door wing <NUM> of the revolving door <NUM> or the second door leaf <NUM> of the door entrance system <NUM>. The second air sensor <NUM> is according to an aspect mounted on/connected to a frame of the door entrance system <NUM>. The first air sensor <NUM> is according to an aspect mounted at a distance from the second opening <NUM> and comprises a wireless connection. According to an aspect the second air sensor <NUM> comprises a wireless connection. According to an aspect the second air sensor <NUM> is further comprised in a ventilation system or air conditioning system of the building <NUM>.

According to an aspect the control unit <NUM> is connected to the revolving door <NUM> and configured to regulate the rotation of the at least two wings <NUM> at least based on input from the first air sensor <NUM>. According to an aspect the control unit <NUM> is connected to the revolving door <NUM> and configured to regulate the rotation of the at least two wings <NUM> at least based on input from the first and second air sensor <NUM>, <NUM>. According to an aspect the control unit <NUM> is connected to the revolving door <NUM> and configured to regulate the rotation of the at least two wings <NUM> at least based on input from the second air sensor <NUM>.

According to an aspect the revolving door <NUM> comprise four of more wings <NUM> and the control unit <NUM> is configured to rotate the wings <NUM> of the revolving door <NUM>. In in full turns. In <FIG> a full rotation of the wings <NUM> of the revolving door <NUM> is disclosed. In <FIG> the door entrance system <NUM> is in a starting position. When a person is approaching the door entrance system <NUM>, sensors of the door entrance system <NUM> identifies the person and start rotating the wings <NUM> of the revolving door <NUM>. If one person should pass through the door entrance system <NUM>, the wings <NUM> of the four winged revolving door <NUM> needs to rotate at least <NUM>° for the person to be able to pass. The person enters into the area between two wings <NUM> that is directed towards the first opening <NUM>, see checked triangle D infigure 3a. When the wings <NUM> of revolving door <NUM> has turned <NUM>°, a quarter of a full turn, the person is in the checked triangle D as disclosed in <FIG>. The person is now inside the revolving door <NUM>.

The wings <NUM> is further rotated and the checked triangle D is now, see <FIG>, is now directed towards the second area <NUM> and the person can start leaving the door entrance system <NUM> and walk into the second area <NUM>. To be secure of that the person is able to leave the door entrance system the wings <NUM> is turned to <NUM>°, as is disclosed in <FIG> where the checked triangle D is facing the wall of the door entrance system <NUM>. The door entrance systems <NUM> are often focused on saving energy and one way to save energy is to reduce the time that the revolving door <NUM> rotates the wings <NUM>. However, by rotating the four winged revolving door <NUM> in full turns, i.e. even <NUM>° rotations, the checked triangle D will return to its starting position, as disclosed in <FIG>. By returning to the starting position the air between the wings <NUM> of the revolving door <NUM> is exposed to the same conditions as it was exposed to before it stated to rotate. As an example, cold air in contact will the first area <NUM> will return to the first area <NUM> when the revolving door <NUM> stops rotating the wings <NUM> and not with the second area <NUM> or the intermediate positions as disclosed in <FIG>. When the revolving door <NUM> is stopped the air in between the wings <NUM> that is directed towards the first and the second area <NUM>, <NUM> will mix with the air in first and the second area <NUM>, <NUM>.

According to an aspect the door entrance system <NUM> comprise a first arc shaped wall <NUM> at a side of the first and second opening <NUM>, <NUM> and a second arc shaped wall <NUM> at an other side of the first and second opening <NUM>, <NUM>, as is disclosed in <FIG>. The first arc shaped wall <NUM> comprise an inner end <NUM> and an outer end <NUM>. The second arc shaped wall <NUM> comprise an inner end <NUM> and an outer end <NUM>. The inner end <NUM>, <NUM> of the first and second arc shaped wall <NUM>, <NUM> define the second opening <NUM>. The outer end <NUM>, <NUM> of the first and second arc shaped wall <NUM>, <NUM> define the first opening <NUM>. Put in another way, the first opening <NUM> is positioned between the outer ends <NUM>, <NUM> of the first and second arc shaped wall <NUM>, <NUM> and the second opening <NUM> is positioned between the inner ends <NUM>, <NUM> of the first and second arc shaped wall <NUM>, <NUM>.

According to an aspect the first and/or second arc shaped wall <NUM>, <NUM> is at least partly hollow, as is disclosed in <FIG>. The first and second door leaf <NUM>, <NUM> is configured to at least partly be positioned in a hollow part <NUM>, <NUM> of the first and/or second arc shaped wall <NUM>, <NUM>. By positioning the first and second door leaf <NUM>, <NUM> within the hollow first and second arc shaped wall <NUM>, <NUM>, the first and second door leaf <NUM>, <NUM> is moveable between the first and second open position <NUM>, <NUM> with a low air leakage between the first and second door leafs <NUM>, <NUM> and the first and second arc shaped walls <NUM>, <NUM>. It also reduces the risk of that the revolving door <NUM> will make contact with the first and second door leafs <NUM>, <NUM> when it its rotated and get stuck.

According to an aspect the first and/or second door leaf <NUM>, <NUM> is moveably to a third closed position C, as disclosed in <FIG>, to close the first and/or second opening <NUM>, <NUM>. This enables the first and second door leafs <NUM>, <NUM> to assist in the locking of the door entrance system <NUM>, for example when a building is closed for the night.

According to an aspect the control unit <NUM> is connected to a data server <NUM> and/or a cloud service <NUM> via a wireless connection <NUM>, as disclosed in <FIG>. According to an aspect the control unit <NUM> is connected to the wireless connection <NUM>. According to an aspect the control unit <NUM> is configured to receive parameters such as pollution levels and/or weather parameters such as temperature, wind and humidity in the air A the first area <NUM> from the data server <NUM> or the cloud service and to regulate width W of the first and/or second opening <NUM>, <NUM> by moving the first and/or second door leaf <NUM>, <NUM> based on the received pollution levels and or weather information. If the received parameters are high/low, the width of the first and or second opening <NUM>, <NUM> is reduced by the control unit <NUM> to reduce the risk of that air from the first area <NUM> enters into the second area <NUM>.

According to an aspect the control unit <NUM> is configured to receive parameters such as pollution levels and/or climate parameters such as temperature, wind and humidity in the air A of the second area <NUM> from the data server <NUM> or the cloud service and to regulate width W of the first and/or second opening <NUM>, <NUM> by moving the first and/or second door leaf <NUM>, <NUM> based on the received pollution levels and or weather information. According to an aspect the data server <NUM> or the cloud service is part of a building management system.

According to an aspect the wireless connection <NUM> comprise a radio communication interface. The radio communication interface <NUM> may be comprised as any number of tranceiving, receiving, and/or transmitting units or circuitry. It should further be appreciated that the radio communication interface may be in the form of any input/output communications port known in the art. The radio communication interface may comprise RF circuitry and baseband processing circuitry. The radio communication interface may support either wireless and/or wired communication. Examples of wireless communication may be Global System for Mobile Communication, GSM, Bluetooth, narrowband communication, Internet of Things, loT, specific communication.

According to an aspect the radio communication interface is configured to send data associated with the door entrance system <NUM> to one or more remote entity. According to an aspect the data is pollution levels in one or more of the different areas <NUM>, <NUM>.

According to an aspect, the one or more remote entity is a server, a database, a further door entrance system <NUM> and/or the cloud service.

According to an aspect the door entrance system <NUM> further comprises a wireless connection interface suitable for sending electronic signals. Examples of wireless connections are BluetoothTM, WiFi, Infrared or any kind of near field communication technology.

According to an aspect the control unit <NUM> comprise a central processor unit (CPU) and a memory (not disclosed).

According to an aspect, the first and/or second air sensor <NUM>, <NUM> comprises a wireless connection unit suitable for sending electronic signals. The connection is a wireless connection. Examples of wireless connections are BluetoothTM, WiFi, Infrared or any kind of near field communication technology. According to an aspect the first and/or the second air sensor <NUM>, <NUM> is wirelessly connected.

Hereafter a method for regulating the door entrance system <NUM> will be described with reference to <FIG>. The method comprise the steps of measuring S100, in the first air sensor <NUM>, parameters of the air A in the first area <NUM>. The measured parameters is according to an aspect the temperature of the air, the humidity of the air, the speed of the air and/or the amount of pollution in the air. Thereafter the step of comparing S101, in the control unit <NUM>, the parameters of the air A in the first area <NUM> with pre-set values of the parameters in the control unit <NUM>. The comparing will identify if the temperature in the first area <NUM> is cold or hot or if the air is humid etc. Thereafter the step of regulating S102 the width W of the first opening <NUM> and/or second opening <NUM> if the parameters of the air A in the first area <NUM> is below or above the pre-set values of the parameters. By comparing the measured parameters with pre-set values the width W of the opening could be regulated. According to an aspect the width W is reduced to decrease the heat transfer from the first area <NUM> to the second area <NUM>. If the heat transfer is low, the air in the building is not heated that much and energy could be saved by not having to run an air-conditioning unit that much in the building.

According to the invention the method comprise the step of measuring, in the second air sensor <NUM>, parameters of the air A in the second area <NUM>, comparing, in the control unit <NUM>, parameters of the air A in the first area <NUM> with parameters of the air A in the second area <NUM>, and regulating the width W of the first opening <NUM> and/or second opening <NUM> if the parameters of the air A in the first area <NUM> is below or above the pre-set values of the parameters.

For example, a sliding door set may comprise of more than two sliding door leafs, arranged in the same way as discussed above.

The description of the aspects of the disclosure provided herein has been presented for purposes of illustration. The description is not intended to be exhaustive or to limit aspects of the disclosure to the precise form disclosed, and modifications and variations are possible in light of the above teachings or may be acquired from practice of various alternatives to the provided aspects of the disclosure. The examples discussed herein were chosen and described in order to explain the principles and the nature of various aspects of the disclosure and its practical application to enable one skilled in the art to utilize the aspects of the disclosure in various manners and with various modifications as are suited to the particular use contemplated. The features of the aspects of the disclosure described herein may be combined in all possible combinations of methods, apparatus, modules, systems, and computer program products. It should be appreciated that the aspects of the disclosure presented herein may be practiced in any combination with each other.

Claim 1:
A door entrance system (<NUM>) for regulating the access between a first area (<NUM>) and a second area (<NUM>), comprising
- a first opening (<NUM>) configured to be connected to the first area (<NUM>),
- a second opening (<NUM>) configured to be connected to the second area (<NUM>) and
- a revolving door (<NUM>) comprising two or more wings (<NUM>),
wherein
- the revolving door (<NUM>) is positioned between the first and second opening (<NUM>, <NUM>) and configured to rotate the two or more wings (<NUM>) to control access between the first and second area (<NUM>, <NUM>) through the first and second opening (<NUM>, <NUM>), and
- the door entrance system (<NUM>) further comprise a first door leaf (<NUM>) moveably between a first open position (O1) and a second open position (O2) to regulate a size (W) of the first opening (<NUM>),
the door entrance system further comprising a control unit (<NUM>) connected to the first door leaf (<NUM>) and to a first air sensor (<NUM>) configured to measure parameters of the air (A) in the first area (<NUM>), characterized in that the control unit (<NUM>) is configured to move the first door leaf (<NUM>) between the first and second open position (O1, O2) to regulate the size (W) of the first opening (<NUM>) at least based on input from the first air sensor (<NUM>), wherein the control unit (<NUM>) is connected to a second air sensor (<NUM>) configured to measure parameters of the air (A) in the second area (<NUM>) and is configured to move the first door leaf (<NUM>) between the first and second open position (O1, O2) to regulate the size (W) of the first opening (<NUM>) at least based on input from the first air sensor (<NUM>) and/or the second air sensor (<NUM>).