JPH06201155A - Heating and ventilating method, and heating and ventilating system - Google Patents

Abstract

PURPOSE:To provide a heating and ventilating system capable of shortening a heating rising time and serving a comfortable heating including near a floor when the ventilation is being carried out by a replacing ventilation system when an indoor area of a building is being heated. CONSTITUTION:A replacement ventilation air outlet 5 is installed below a space 2. There are provided near a ceiling surface 4 within the space 2 and air discharging gallery 9, a blower 10 for sucking and discharging air in the space, and a duct 11 for transporting discharged air from the blower. In addition, directing nozzles 12, 13, 14 and 15 connected to the duct 11 are arranged with a proper spacing being left, and each of the blowing ports in each of the nozzles is directed toward an elevation angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating / ventilation method and system for performing ventilation simultaneously with heating.

[0002]

2. Description of the Related Art The displacement ventilation method utilizes temperature stratification resulting from the temperature difference between the conditioned air supplied to the room and the air warmed by the heat load caused by the heat generated in the room, and it is used for living areas and work near the floor. It fills the area with fresh and clean air, and has superior features such as a small air volume and a small cooling capacity compared to the conventional dilution ventilation method.

However, there is a problem in performing air conditioning including heating under this replacement ventilation method. That is, the above-mentioned temperature stratification is convenient in the case of cooling operation in the summer, but in the case of heating operation in the winter, the supplied warm air rises near the ceiling and near the floor where there are personnel. It does not warm up easily, and the above-mentioned temperature stratification is inconvenient. To be more specific, when air with a temperature higher than the ambient room temperature, which has a heat quantity equivalent to the room heating load, is supplied from the replacement ventilation outlet, the supplied warm air is at the same temperature as the ambient air. Because of the large difference, it immediately rose to the ceiling and stayed there, and the area near the floor where the workers and residents were not warmed. Moreover, since the blowing air velocity from the displacement ventilation outlet is generally a low speed of 0.6 m / s or less, such a phenomenon was more remarkable.

Therefore, conventionally, when performing air conditioning including heating under a replacement ventilation system, warm air-conditioned air is supplied to the room by floor blowing by a double floor structure, or replacement for supplying the air-conditioned air is performed. The ventilation outlet was installed near the floor, and a floor heating device and a radiant heating device that were separately provided were also used.

[0005]

However, first of all, in the former floor blowing with a double floor structure, it is a very difficult construction to make the floor a double structure, and it is necessary to change from the building structure and it is very expensive. It becomes a system. Therefore, the double-floor structure method has never been adopted in factories.

On the other hand, in the latter method of using the outlet for replacement ventilation and another heating device in combination, a separate heating device is required, so that the equipment and the amount of construction accompanying it are bulky, and the efficiency is satisfactory. It wasn't.

Further, even when the floor heating device and the radiant heat heating device are used together, the warmed air immediately rises, the stirring action of the indoor air is not great, and the heating rise time near the floor surface is long.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a heating / ventilation method which improves the temperature distribution during heating and improves the rise of temperature near the floor. The system is provided to solve the above problems.

Therefore, in claim 1, first, the conditioned air is blown into the room at a low speed from the lower side of the room to be ventilated, and the room air is exhausted from the exhaust port provided near the ceiling, and the room is heated by appropriate means. In addition, a heating / ventilation method is provided which is characterized in that a high-speed air jet flow is generated near the ceiling in the depression direction. Here, as the heating means, for example, the conditioned air itself may be warmed to a required temperature, or other general radiation panel or floor heating means may be used.

In this case, the wind speed of the high-speed air jet stream may be changed based on the temperature near the floor of the room as in claim 2.

Further, in claim 3, the conditioned air is blown into the room at a low speed from below the room to be ventilated, and the room air is exhausted from the exhaust port provided near the ceiling.
The room is heated by an appropriate means, a high-speed air jet flow is further generated in the depression angle direction near the ceiling, and the wind speed of the high-speed air jet flow is decelerated or stopped after a certain period of time,
After that, a heating / ventilation method is provided in which the temperature of the conditioned air is set to be equal to or lower than the temperature near the floor surface in the room (equal or low temperature) and blown out into the room.

As a concrete system for carrying out the heating / ventilation method as described above, in claim 4, an outlet for conditioned air is provided below the room to be ventilated,
On the other hand, in the vicinity of the ceiling in the room, an exhaust port for indoor air, a blower for sucking in and discharging the indoor air, and a small-diameter duct for transferring the discharge air from the blower are provided,
Furthermore, a heating / ventilation system is characterized in that a plurality of directional nozzles connected to the small-diameter duct are arranged near the ceiling at appropriate intervals, and the outlets of these nozzles are oriented in the depression direction. provide.

In such a system, as described in claim 5, the depression angle of the outlet of the nozzle may be changed.

[0014]

According to the first aspect, the high-speed air jet flow in the depression direction, which is generated near the ceiling in the room, attracts the warm air around the ceiling, which is directed toward the lower part of the room. And carry. Therefore, even if warm air during heating rises near the ceiling, it is attracted and conveyed by the high-speed air jet flow, and a circulation path for the air flow is formed throughout the room, so that the room air is agitated. As a result, the temperature of the indoor air is made uniform.

Therefore, the temperature rise near the floor surface where the worker or occupant rises quickly, and the heating rise time is shortened.
Actually, the inventor verified that under the same air-conditioning air and the same heating operation, when such a high-speed air jet flow in the depression direction is generated, the heating rise time near the floor surface is higher than that in the conventional case. Was shortened to about 1/2 to 1/4.

Further, since the conditioned air is blown out from the lower side of the room to be ventilated and the room air is exhausted from the exhaust port provided near the ceiling, the room is ventilated by the displacement ventilation method.

When the wind speed of the high-speed air jet flow is changed based on the temperature near the floor of the room,
Efficient air conditioning and heating according to room temperature can be performed.

According to the third aspect, the wind speed of the high-speed air jet flow is decelerated or stopped after a certain period of time, and thereafter, the temperature of the conditioned air is set below the temperature near the floor surface of the room and blown out into the room. Therefore, after the temperature inside the room is once raised and stabilized, the ventilation efficiency of the room can be improved by blowing out the conditioned air at such temperature. Also, by utilizing this fact, the wind speed of the high-speed air jet flow can be increased or generated again after a while, thereby performing intermittent heating operation to achieve energy saving and effective replacement. Ventilation can be done.

According to the fourth aspect, it is possible to obtain the action of the above-mentioned first aspect by installing each device by construction near the indoor side ceiling. Therefore, it is easy to implement in existing buildings. Moreover, in the case of claim 4, since the blower itself also sucks in and discharges the warm air staying in the vicinity of the ceiling, the circulation path of the air flow can be easily formed, and the temperature of the indoor air can be made extremely efficient. And stirring is performed.

According to the fifth aspect, since the depression angle of the air outlet of the nozzle can be changed, an optimum air circulation path can be formed according to the conditions such as the size of the room, the temperature, and the type of heating means.

[0021]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a side view of the embodiment of the present invention.
Is a building of an existing factory in which a space 2 to be heated / ventilated is formed. Regarding the size of the space 2, the height from the floor surface 3 to the ceiling surface 4 is 10 m,
The vertical length is 50 m and the horizontal length is 100 m. An outlet 5 for replacement ventilation is installed near the floor 3 in this building 2,
Air-conditioned air from the air conditioner 6 provided outside the space 2 is blown into the space 2 at a wind speed of approximately 0.6 m / s.

The air conditioner 6 has a heating device 7 so that the introduced outside air can be warmed up to a required temperature and supplied. The air conditioner 6 additionally has a total heat exchanger 8. Therefore, heat can be recovered from the indoor air exhausted through the exhaust gallery 9 provided near the ceiling 2 in the space 1 without waste, and the introduced outside air can be warmed while being clean. Therefore, the heat from the exhaust can be effectively used to save energy during heating.

A blower 10 for sucking and discharging the air in the space 2 is installed near the ceiling surface 4 in the building 2.
The discharged air passes through a small-diameter duct 11 and a plurality of nozzles 12, 13, 14, which are connected to the duct 11.
From 15, a high-speed air jet flow is blown into the space 1 1. In the description, the number of nozzles is four for convenience of illustration.

Each of these nozzles 12, 13, 14, 15
Are connected to the duct 11 via the supports 16, respectively, as shown in FIG. The support 16 is configured to have flexibility, for example, by a flexible duct structure, and can be bent in a horizontal direction at right angles as shown in FIG. 3, for example. Since each nozzle is provided at the tip of such a flexible support body 16, the nozzles 12, 13, 14, and 15 can freely rotate and set the depression angle, respectively. In addition, each nozzle 12,
The intervals of 13, 14, and 15 are set to be 3 to 6 m. The diameter of the outlet of each nozzle 12, 13, 14 and 15 is 20 to 30 mm, and the blown out wind speed is 1
By the operation control of 0, it can be freely set up to 10 to 30 m / s.

As shown in FIG. 1, the outlets of these nozzles 12, 13, 14 and 15 are in substantially the same direction (the direction with respect to the horizontal direction), but the depression angle is the largest in the nozzle 12 and is replaced as follows. Nozzle 1 near ventilation outlet 5
It is set to gradually decrease as it goes to 5.

The present embodiment is configured as described above,
When the air conditioner 6 and the blower 10 are operated to perform heating / air conditioning operation, the conditioned air is blown out at a low speed from the replacement ventilation outlet 5, and the nozzles 12, 13, 14, 1
Although a high-speed air jet flow is blown out from the outlet of No. 5, this high-speed air jet flow attracts the surrounding air and conveys it in the depression angle direction, so that the space 2 is as shown in FIG. A circulation path for the air flow is formed.

As a result, the temperature in the vicinity of the floor surface 3 rises quickly, and the air in the space 2 is agitated by the circulation of the air flow, so that the temperature in the space 2 is made uniform. Therefore, the worker who is in the vicinity of the floor surface 3 can enjoy comfortable heating.

On the other hand, since the indoor air is exhausted from the exhaust gallery 9 provided near the ceiling surface 4, the space 2 can be ventilated by the displacement ventilation system at the same time as the heating.

Next, the heating rise time when the above-mentioned embodiment was used was examined in the vicinity of the floor surface 3 and the results were as follows. First, when the outside air temperature is 2 to 6 ° C,
When the temperature of the outlet 5 for displacement ventilation was set to about 32 ° C. and the temperature at a point 1.5 m above the floor was measured, the graph shown in FIG. 4 was obtained. In this case, for example, the time required to reach 20 ° C. was about 1.2 Hour.

Next, in the configuration of the above-mentioned embodiment, the blower 11 is stopped to stop the generation of the high-speed air jet flow, and only the blowing of the conditioned air from the ventilation outlet 5 for replacement ventilation heats and air-conditions the space 2. When the operation is performed, that is, when the heating / air conditioning operation is performed by the conventional method, the result is shown in the graph of FIG. According to this, it takes about 3 hours to reach 20 ° C. Therefore, it can be seen that this embodiment can shorten the time by about 40% as compared with the conventional example and reach the predetermined temperature.

In order to efficiently perform heating / ventilation without raising the temperature more than necessary, it is desirable to intermittently heat as appropriate, but in the conventional method, it takes time to start heating as shown in the graph of FIG. It is not preferable because it causes a time lag. However, according to the present invention, as shown in the graph of FIG.
The vicinity of the floor surface 3 can be quickly warmed up, and preferable intermittent heating can be carried out. In this case, if the start / stop of the blower 10 is controlled by the signal from the temperature sensor provided in the vicinity of the floor surface 3, the heating / ventilation state can always be optimally realized.

Since the nozzle used in the above embodiment is provided in the duct 11 via the flexible support member 16,
The turning and depression angles can be set freely and can be applied to various sizes of building spaces. Further, since the number of nozzles and the interval can be freely set, it is possible to construct an optimum system according to the target space.

In the above embodiment, the heating load is dealt with by the heating device 7 in the air conditioner 6, but the present invention is not limited to this, and a radiation panel or another heating device may be used. It is also possible to use them together. In this case, the effect of the present invention can be more efficiently enjoyed by using a so-called radiant heating type heating device that does not significantly disturb the indoor air flow or a low speed blowing heating device as in the above-described embodiment.

[0034]

According to the first aspect of the present invention, the temperature of the indoor air can be made uniform quickly, and the vicinity of the floor surface where the personnel are can be effectively and quickly warmed. At the same time, the replacement ventilation system can air-condition and ventilate the room. Therefore, it is possible to teach a comfortable heating environment under the replacement ventilation method without using the floor blowing method with the double floor structure, and it can be easily implemented in factories.

According to the second aspect, since the wind speed of the high-speed air jet flow can be changed based on the temperature near the indoor floor surface, efficient air conditioning and heating according to the room temperature can be performed.

According to the third aspect, it is possible to adopt a method of improving ventilation efficiency while performing heating. Regarding heating at that time, the vicinity of the floor can be effectively and promptly warmed as in the first aspect.

According to the fourth aspect, the effect of the first aspect can be obtained by the construction on the indoor side without using the space above the ceiling. Therefore, it can be easily applied to an existing building, and the construction at that time is also easy.
Moreover, since the blower itself also sucks in and discharges the warm air staying in the vicinity of the ceiling, the circulation path of the air flow can be formed more easily, and the temperature of the indoor air can be made extremely efficient.

According to the fifth aspect of the present invention, the depression angle of the outlet of the nozzle can be further changed while having the same effect as the fourth aspect, so that it can be adjusted according to the conditions such as the size of the room, the temperature, and the type of heating means. It is possible to form an optimal air circulation path.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment viewed from a side surface.

FIG. 2 is a side view when the nozzle used in the example is oriented in the vertical direction.

FIG. 3 is a side view when the nozzle used in the embodiment is oriented at a right angle in the horizontal direction.

FIG. 4 is a graph showing a heating rising time in the example.

FIG. 5 is a graph showing a heating rise time according to a conventional method.

[Explanation of symbols]

 1 Building 2 Space 3 Floor surface 4 Ceiling surface 5 Displacement ventilation outlet 6 Air conditioner 7 Heating device 9 Exhaust gallery 10 Blower 11 Duct 12, 13, 14, 15 Nozzle 16 Support

Claims (5)

[Claims] 1. A conditioned air is blown into the room at a low speed from the lower side of the room to be ventilated, the room air is exhausted from an exhaust port provided near the ceiling, and the room is heated by an appropriate means, and further near the ceiling. A heating and ventilation method characterized by generating a high-speed air jet flow in the depression direction. 2. The heating / ventilation method according to claim 1, wherein the wind speed of the high-speed air jet flow is changed based on the temperature near the indoor floor surface. 3. Air-conditioned air is blown into the room at a low speed from below the room to be ventilated, room air is exhausted from an exhaust port provided near the ceiling, and the room is heated by an appropriate means, and further near the ceiling. At that time, a high-speed air jet flow is generated in the depression direction, the wind speed of the high-speed air jet flow is decelerated or stopped after a certain period of time, and thereafter, the temperature of the conditioned air is set below the temperature near the floor in the room. A heating / ventilation method characterized by blowing out into the room. 4. An outlet for conditioned air is provided below a room to be ventilated, while an outlet for indoor air and a blower for sucking and discharging indoor air are provided near the ceiling of the room, and from this blower. Each of the small-diameter ducts for transferring the discharge air of is provided, and a plurality of directional nozzles connected to the small-diameter ducts are arranged near the ceiling at appropriate intervals, and the outlets of these nozzles are arranged in the depression angle direction. A heating and ventilation system characterized by being aimed at. 5. The heating / ventilation system according to claim 4, wherein the depression angle of the outlet of the nozzle is variable.