JP2017142009A - Ventilation system and ventilation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a ventilation system capable of realizing a more comfortable indoor environment by reducing temperature unevenness and ventilation unevenness and considering individual differences in thermal sensation such as cold and hot. SOLUTION: A ventilation device 10 for exhausting indoor air taken in from an inside air recovery port 10e to the outside and supplying the outdoor air to the room from an outlet 10f is provided on the first floor, and an indoor air recovery port 11e is provided on the second floor. It is equipped with a ventilation device 11 that exhausts the indoor air taken in from the outside and supplies the outdoor air indoors from the outlet 11f, and at least one ventilation is provided according to the heating/cooling conditions and the demands of residents. The amount of exhaust air to the outside of the devices 10 and 11 is set to a value different from the amount of air supply to the interior. [Selection diagram] Figure 1

Description

  The present invention relates to a ventilation system and a ventilation method for realizing a comfortable indoor environment.

  In order to realize a comfortable indoor environment, various air conditioning systems are conventionally known. For example, there are individual air conditioning in which air-conditioning equipment such as an air conditioner is installed for each living room to be air-conditioned, and whole building air-conditioning that performs air conditioning for a plurality of living rooms as in Patent Document 1. Ventilation is also an important factor for a comfortable indoor environment.

JP-A-5-172371

  In recent years, there has been a demand for realizing a more comfortable indoor environment by reducing indoor temperature spots and ventilation spots, and taking into account individual differences in thermal feeling such as cold and hot. However, with conventional systems, considerations for making the indoor environment comfortable are insufficient, and the conditioned air blown into the room moves through the room in a state that is close to the eventual condition. Driving in consideration of individual differences in feeling was difficult. For example, as is well known, since the density of air increases as the temperature decreases, warm air tends to be distributed on the upper side in the vertical direction and cold air on the lower side in the vertical direction. In addition, for example, there are a space in which air easily moves and a space in which air frequently changes, and a space in which air tends to stay, depending on the location.

  The present invention has been made to solve the above-described problems, and is more comfortable by reducing temperature spots and ventilation spots, or considering individual differences in thermal feeling such as cold and hot. An object is to obtain a ventilation system and a ventilation method capable of realizing an indoor environment.

  The ventilation system according to the present invention includes a plurality of ventilators that exhaust indoor air taken in from the inside air recovery port to the outside and supply outdoor air to the indoors from the outlet, and at least one of the plurality of ventilators. The exhaust air volume to the outside of the ventilator is set to a value different from the air supply air volume to the indoor of the ventilator.

  According to the present invention, the ventilator is provided with a different amount of the exhaust air flow to the outside and the air supply air amount to the indoor space. Therefore, it is possible to reduce temperature spots and ventilation spots, and to consider individual differences in thermal feeling such as cold and hot. And a more comfortable indoor environment can be realized.

It is the schematic at the time of installing the ventilation system which concerns on Embodiment 1 of this invention in a building. 2A is a first floor plan view of the building of FIG. 1 in which the ventilation system according to Embodiment 1 of the present invention is installed, and FIG. 2B is a diagram of FIG. 1 in which the ventilation system according to Embodiment 1 of the present invention is installed. It is a 2nd floor plan view of the building.

Embodiment 1 FIG.
FIG. 1 is a schematic view when a ventilation system according to Embodiment 1 of the present invention is installed in a building. 2A is a first-floor plan view in that case, and FIG. 2B is a second-floor plan view. In the buildings shown in FIG. 1 and FIGS. 2A and 2B, the whole building air conditioning system is introduced to perform indoor heating and cooling.
In the entire building air conditioning system, warm air or cold air conditioned air is generated by the cooperation of the air conditioning outdoor unit 1 and the air conditioning indoor unit 2 connected to the air conditioning outdoor unit 1 via a refrigerant circulation line (not shown). Is done.

The air conditioning outdoor unit 1 exchanges heat between outside air and refrigerant, and includes a compressor, a water-cooled heat exchanger (or an air-cooled heat exchanger and a fan), and the like.
The indoor unit 2 for air conditioning is installed in the back of a ceiling, for example, and has a heat exchanger, a fan, etc. The air conditioner indoor unit 2 exchanges heat between the refrigerant sent from the air conditioner outdoor unit 1 via the refrigerant circulation line and the return air from the living room using a heat exchanger. And the conditioned air after heat exchange is sent out by a fan. The conditioned air sent out by the air conditioning indoor unit 2 is blown out from the outlet 3 to each room through a supply duct (not shown). After that, the entire building is air-conditioned by the conditioned air reaching the passages and stairs through the louvers provided in each room and the undercuts of the doors. The air conditioning indoor unit 2 takes in return air from the living room via a return duct (not shown).

Moreover, the ventilation system which has the ventilation apparatuses 10 and 11 is introduced in the building shown in FIG.1 and FIG.2A, 2B.
On the first floor, the ventilator 10 is installed as an indoor unit for ventilation in, for example, a machine room. On the second floor, the ventilator 11 is also installed as an indoor unit for ventilation in, for example, a machine room. Each machine room is provided with a louver, a door undercut or the like, so that air can be moved inside and outside the machine room. The ventilation device 10 has a heat exchanger 10a, fans 10b, 10c and the like for ventilation, and the ventilation device 11 has a heat exchanger 11a, fans 11b, 11c and the like for ventilation.

  Specifically, the ventilator 10 takes in outside air from the outside air intake 10d and takes in air on the first floor from the inside air recovery port 10e provided on the side surface of the casing of the ventilation device 10, and heats both by the heat exchanger 10a. Let them exchange. The outside air after heat exchange is blown to the first floor from the outlet 10f provided on the side surface of the housing of the ventilator 10, and the air taken in from the first floor after the heat exchange is exhausted to the outside through the outlet 10g. . At this time, air flows from the outside air inlet 10d to the outlet 10f by the rotation of the fan 10b, and air flows from the inside air recovery port 10e to the outlet 10g by the rotation of the fan 10c.

  Similarly, the ventilator 11 takes in outside air from the outside air intake port 11d and takes in air on the second floor from the inside air recovery port 11e provided on the side of the casing of the ventilation device 11, and heat-exchanges both of them with the heat exchanger 11a. Let After the heat exchange, the outside air is blown to the second floor from the outlet 11f provided on the side of the casing of the ventilator 11, and the air taken in from the second floor after the heat exchange is exhausted to the outside through the outlet 11g. . At this time, the air flows from the outside air intake port 11d to the blowout port 11f by the rotation of the fan 11b, and the air flows from the inside air recovery port 11e to the discharge port 11g by the rotation of the fan 11c.

  The heat exchangers 10a and 11a provided in the ventilation devices 10 and 11 may be total heat exchangers or sensible heat exchangers. By providing the heat exchangers 10a and 11a in the ventilators 10 and 11, the outside air taken in from the outside air intakes 10d and 11d is warmed by the indoor air taken in from the inside air collection ports 10e and 11e during heating and during cooling. Can be cooled. Thereby, the loss of the heat energy by ventilation can be reduced. Note that the heat exchangers 10a and 11a can be omitted from the ventilators 10 and 11 in order to reduce the cost of the ventilators 10 and 11.

  In the ventilation system according to Embodiment 1 of the present invention, an unillustrated control unit controls the rotation speed of the fans 10b, 10c, 11b, and 11c, so that the air supply air volume to the indoors of the ventilation devices 10 and 11 and the outdoor The balance of the exhaust air volume to is adjusted. Alternatively, a damper is provided between the outside air inlets 10d and 11d and the outlets 10f and 11f, and a damper is provided between the inside air recovery ports 10e and 11e and the outlets 10g and 11g. May be controlled by a control unit (not shown) to adjust the balance between the indoor air supply amount and the outdoor exhaust air amount.

Next, an operation example of the ventilation system configured as described above will be described.
First, the case where the whole building is air-conditioned by an air conditioning system will be described.
At this time, the ventilator 10 installed on the first floor is set so that the supply air volume to the indoor is rich and the exhaust air volume to the outdoors is poor. That is, for example, the indoor air supply air volume is set to 150 [m ³ / h] and the outdoor exhaust air volume is set to 50 [m ³ / h]. In this case, in the ventilator 10, the amount of air supplied to the indoor is 100 [m ³ / h] more than the amount of air exhausted to the outside, and the amount of air supplied indoors increases.
On the other hand, the ventilator 11 installed on the second floor is set so that the supply air volume to the indoors is poor and the exhaust air volume to the outdoors is rich. That is, for example, the indoor air supply air volume is set to 50 [m ³ / h] and the outdoor exhaust air volume is set to 150 [m ³ / h]. In this case, in the ventilator 11, the amount of air exhausted to the outdoors is 100 [m ³ / h] greater than the amount of air supplied to the indoors, and the amount of air exhausted outdoors increases.

The air flow generated when the ventilators 10 and 11 are operated in this way is shown in FIGS. 1 and 2A and 2B. In the ventilation device 10 on the first floor, the supply air volume to the indoor is larger than the exhaust air flow to the outdoors, and in the ventilation device 11 on the second floor, the exhaust air flow to the outdoors is larger than the supply air flow to the indoor. Thus, an air flow from the first floor to the second floor is generated as shown by an arrow F in FIGS. 1 and 2A, 2B.
Since the density of the air increases as the temperature decreases, the cold air moves downward in the vertical direction and the warm air moves upward in the vertical direction. In other words, when viewed from the whole building, the cool air on the upper floor falls to the lower floor, and temperature spots occur. In addition, when viewed in a single room, cold air is distributed on the floor side and temperature spots occur. Therefore, in the present invention, by adjusting the balance between the supply air volume and the exhaust air volume of the ventilators 10 and 11, an air flow from the first floor to the second floor is generated, and temperature spots are reduced. Further, since the cold air staying at the lower side in the vertical direction and the warm air staying at the upper side in the vertical direction are diffused so as to be caught in the generated air flow, ventilation spots are also reduced.

  Further, as shown in FIGS. 2A and 2B, the ventilators 10 and 11 are installed so as to be diagonal to each other in a plan view when viewed from the upper side in the vertical direction. 11 internal air recovery ports 11e are diagonally located in a plan view similar to the above. As a result, an air flow that horizontally crosses the room is generated, so that temperature spots and ventilation spots are further reduced.

Then, the case where the indoor is heated with the whole building air conditioning system is demonstrated.
In the case of heating, the ventilators 10 and 11 are set to the opposite settings as in the case of cooling. That is, the ventilator 10 installed on the first floor is set so that the supply air volume to the indoors is poor and the exhaust air volume to the outdoors is rich. On the other hand, the ventilator 11 installed on the second floor is set so that the air supply amount to the indoors is rich and the exhaust air amount to the outdoors is poor. Thereby, the flow of the air which goes to the 1st floor from the 2nd floor generate | occur | produces, and the temperature spot and the ventilation spot are reduced like the time of cooling.

  Considering individual differences in thermal feeling such as cold and hot, there may be a case where the first floor is not cooler and the second floor is not so cool during cooling. In this case, the ventilator 10 installed on the first floor is set so that the supply air volume to the indoor is poor and the exhaust air volume to the outdoors is rich, and the ventilator 11 installed on the second floor is indoors. The air supply air volume is set to be rich and the exhaust air volume to the outdoors is set to be poor. If it does in this way, the flow of the air which goes to the 1st floor from the 2nd floor which was generated in the course of cooling will become strong, and it will become easy to move cold air to the 1st floor. When the air flow becomes strong, air hardly stays in the same place, so that ventilation spots are also reduced.

  It is also conceivable that the second floor is warmer and the first floor is not so warm during heating. In this case, the ventilator 10 installed on the first floor is set so that the supply air volume to the indoors is rich and the exhaust air volume to the outdoors is poor, and the ventilator 11 installed on the second floor is indoors. The air supply air volume is set to be poor and the exhaust air volume to the outdoors is rich. If it does in this way, the flow of the air which goes to the 2nd floor from the 1st floor which was generated in the course of heating will become strong, and it will become easy to move warm air to the 2nd floor. When the air flow becomes strong, air hardly stays in the same place, so that ventilation spots are also reduced.

Next, a case where it is not necessary to perform heating and cooling such as spring and autumn will be described.
When heating and cooling are not performed, since the temperature spots that have occurred are small in the first place, one of the ventilators 10 and 11 is operated so that the exhaust air volume to the outside differs from the air supply air volume to the indoor. Even if it is the flow of the air which generate | occur | produces by this, it is effective for reduction of a temperature spot. For example, if the flow of air from the first floor to the second floor is generated, the ventilation device 10 installed on the first floor is rich in the indoor air supply and the outdoor exhaust air is poor. Set. Or you may set with the ventilation apparatus 11 installed in the 2nd floor so that the supply air volume to indoors may be poor and the exhaust air volume to the outdoors may be rich. Also, for example, if the flow of air from the second floor to the first floor is generated, the ventilation device 10 installed on the first floor is used to increase the indoor air supply volume and to increase the outdoor exhaust volume. Set to. Or you may set with the ventilation apparatus 11 installed in the 2nd floor so that the supply air volume to indoors may be rich, and the exhaust air volume to the outdoors may be poor. By operating the ventilator 10 or the ventilator 11 to generate an air flow, it is possible to reduce temperature spots and ventilation spots and to realize an indoor environment that takes into account individual differences in thermal feeling. At this time, with respect to any one of the ventilators 10 and 11 operated so that the exhaust air flow rate to the outside differs from the supply air flow rate to the indoors, the other ventilator 10 and 11 stops the operation. Natural ventilation may be used, and the rich air settings for the outdoor exhaust air volume and indoor air supply air volume may be set to increase the flow of air generated by the operation of one of the ventilators 10 and 11. You may be operating opposite to the settings in the devices 10 and 11. When the operation of the other ventilators 10 and 11 is stopped, the interior is inclined to positive pressure or negative pressure, but the air moves between the outside air through the vent holes provided on the outer wall of the building, Positive pressure or negative pressure is relaxed to the extent that there is no problem.

  As described above, the operations of the ventilators 10 and 11 are variously set according to the heating / cooling situation, the resident's request, and the like. At least one ventilator sets the outdoor exhaust air volume and the indoor air supply air volume to different values. The flow of air thus generated can reduce temperature spots and ventilation spots, and can take into account individual differences in thermal sensation, thereby realizing a more comfortable indoor environment.

  The indoor supply air volume and the outdoor exhaust air volume in the ventilators 10 and 11 can be manually changed by, for example, an occupant operating the remote controller to give an instruction to the control unit of the ventilation system. Or you may design so that a control part may change automatically according to a condition. When the control unit automatically changes the temperature sensor, the temperature sensor is installed on the first and second floors of the building. What is necessary is just to program a control part so that it can determine whether the supply air volume is rich, the exhaust air volume to the outdoors is poor, the indoor supply air volume is poor, and the exhaust air volume to the outdoors is rich. Also, depending on whether it is heating or cooling, the air supply volume to the indoors is rich in either of the ventilators 10 and 11, the exhaust air volume to the outdoors is poor, the indoor air supply air volume is poor, and the outdoor exhaust air is exhausted. The control unit may be programmed to uniquely determine whether the air volume is rich. Whether it is heating or cooling can be determined by obtaining operation information from the entire building air conditioning system.

In the above description, the case where the ventilation system of the first embodiment is applied to a building that is air-conditioned by the entire building air-conditioning system has been described. Since the building that employs the entire building air-conditioning system is designed with high airtightness, ventilation is essential in the first place, which is suitable for introducing the ventilation system of the first embodiment.
However, the ventilation system of the first embodiment may be applied to a building that is air-conditioned by individual air conditioning rather than whole-building air conditioning. For example, when air movement between the first floor room that is subject to air conditioning by the first air conditioner and the second floor room that is subject to air conditioning by the second air conditioner is easy due to a blowout or the like. The ventilation system according to Embodiment 1 is suitable.

In the above description, a two-story building has been described as an example. However, the ventilation system of Embodiment 1 can be applied even to a building having three or more stories. In this case, at least the ventilation device 10 may be installed on the lowermost floor and the ventilation device 11 on the uppermost floor. Of course, a ventilator is installed on each floor, and the air supply air volume to each ventilator and the exhaust air flow rate to the outside are adjusted, and the air flow toward the upper floor or the air flow toward the lower floor is adjusted. It may be generated.
Moreover, in the case of a one-story building, it is possible to reduce temperature spots and ventilation spots by installing the ventilators 10 and 11 diagonally in plan view when viewed from above in the vertical direction.

  Further, in the above, by installing the ventilator 10 on the first floor, the air on the first floor is taken in and exhausted from the inside air recovery port 10e provided in the casing, and the outside air is blown out from the outlet 10f to the first floor. I was in the air. However, by installing the ventilator 10 on the second floor and connecting the inside air recovery port 10e and the outlet 10f that are exposed to the space on the first floor via ducts, the supply and exhaust of the first floor can be performed. You may go. Similarly, the ventilation device 11 is installed on the first floor, and is connected to the inside air recovery port 11e and the outlet 11f that are exposed in the space on the second floor through a duct, thereby supplying and supplying air and exhaust on the second floor. May be performed. If the duct is used in this way, the ventilators 10 and 11 can be installed together in one machine room. However, in consideration of pressure loss, it is preferable to avoid the use of a duct or to install the ventilators 10 and 11 so that the duct length is as short as possible.

  Moreover, the case where the air conditioning indoor unit 2 responsible for heating and cooling and the ventilation devices 10 and 11 responsible for ventilation are installed as separate devices has been described above. However, you may provide the indoor unit 2 for air conditioning, for example so that it may become integral with the ventilation apparatus 11 as an apparatus.

  As described above, according to the first embodiment, the exhaust air volume to the outdoors and the supply air volume to the indoors are set to different values in at least one of the ventilators 10 and 11. Due to the air flow thus generated, it is possible to reduce temperature spots and ventilation spots, and to take into account individual differences in thermal feeling, and a more comfortable indoor environment can be realized.

  Further, in the ventilation system of the present invention, the first ventilation device in which the exhaust air flow rate to the outside of the ventilation device is set larger than the supply air flow rate to the indoor of the ventilation device, and the exhaust air flow rate to the outdoor of the ventilation device. However, the second ventilation device set to be smaller than the amount of air supplied to the indoor of the ventilation device is included. If it does in this way, the temperature spot and ventilation spot at the time of heating / cooling operation | movement can be reduced efficiently, and the indoor environment which considered the individual difference of thermal feelings, such as cold and hot, can be implement | achieved efficiently.

  Further, the inside air recovery port of the first ventilation device and the outlet port of the second ventilation device are positioned diagonally to each other in plan view. In this way, an air flow that crosses the indoors in the horizontal direction is generated, which is effective in further reducing temperature spots and ventilation spots.

  In addition, when the room is air-conditioned, the first ventilator is the ventilator 11 in which the inside air recovery port 11e and the outlet 11f are arranged in the space on the top floor of the building to ventilate the space, and the second ventilator is The inside air recovery port 10e and the air outlet 10f are arranged in the space on the lowest floor of the building and are the ventilation device 10 for ventilating the space. This is effective in reducing temperature spots and ventilation spots during cooling.

  When the indoor is heated, the first ventilator is the ventilator 10 in which the inside air recovery port 10e and the outlet 10f are arranged in the space on the lowest floor of the building to ventilate the space, and the second ventilator. The inside air recovery port 11e and the air outlet 11f are arranged in the space on the top floor of the building and are the ventilation device 11 for ventilating the space. This is effective in reducing temperature spots and ventilation spots during heating.

  Moreover, the ventilators 10 and 11 have heat exchangers 10a and 11a, and supply the outdoor air heat-exchanged with the indoor air taken in from the inside air recovery ports 10e and 11e from the outlets 10f and 11f. It was decided. If it does in this way, the loss of the heat energy by ventilation can be reduced.

  In the present invention, any constituent element of the embodiment can be modified or any constituent element of the embodiment can be omitted within the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Air-conditioning outdoor unit 2 Air-conditioning indoor unit 3 Air outlet 10 Ventilator 10a Heat exchanger 10b Fan 10c Fan 10d Outside air intake 10e Inside air recovery port 10f Air outlet 10g Outlet 11 Ventilator 11a Heat exchanger 11b Fan 11c Fan 11d Outside air intake port 11e Inside air recovery port 11f Outlet port 11g Discharge port

Claims (7)

Equipped with multiple ventilators that exhaust indoor air taken from the inside air recovery port to the outside and supply the outdoor air from the outlet to the indoors.
The ventilation system characterized in that the exhaust air volume to the outdoors of at least one ventilator among the plurality of ventilators is set to a value different from the indoor air supply volume of the ventilator. The plurality of ventilation devices include
A first ventilator in which the exhaust air volume to the outside of the ventilator is set to be larger than the air supply air volume to the indoor of the ventilator;
The ventilation system according to claim 1, further comprising: a second ventilation device in which an exhaust air flow rate to the outside of the ventilation device is set to be smaller than an air supply air flow rate to the indoor of the ventilation device.   The ventilation system according to claim 2, wherein the inside air recovery port of the first ventilation device and the outlet port of the second ventilation device are diagonally located in a plan view. If the room is air-conditioned,
The first ventilator is a ventilator in which an inside air recovery port and an outlet are arranged in the space on the top floor of the building to ventilate the space,
The ventilation system according to claim 2 or 3, wherein the second ventilation device is a ventilation device in which an inside air recovery port and a blow-out port are arranged in a space on the lowest floor of the building to ventilate the space. If the room is heated,
The first ventilator is a ventilator in which an inside air recovery port and a blowout port are arranged in the space on the lowest floor of the building to ventilate the space,
5. The ventilator according to claim 2, wherein the second ventilator is a ventilator in which an inside air recovery port and an outlet are arranged in a space on the top floor of the building to ventilate the space. The ventilation system described in the section.   The plurality of ventilators have a heat exchanger, and supply outdoor air that has been heat-exchanged with indoor air taken in from an inside air recovery port, from the outlet. The ventilation system according to any one of 5. In a ventilation system equipped with multiple ventilators that exhaust indoor air taken from the indoor air recovery port to the outside and supply the outdoor air indoors from the outlet.
The ventilation method characterized by making the exhaust air volume to the outdoors of at least one ventilator out of the plurality of ventilators different from the air supply air volume to the indoor of the ventilator.

Images