JPH0827043B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a branch portion in which a plurality of air-conditioning target spaces are connected in parallel to an exhaust fan by an exhaust path, and the exhaust paths are separately connected to the air-conditioning target space. Each of them relates to an air conditioner provided with an automatic pressure adjuster for maintaining the internal pressure of the air-conditioned space within a set range.

[Conventional technology]

Conventionally, as shown in FIG. 3, the air-conditioned space (1a),
The exhaust fan (35) for exhausting air from (1b), (1c) is formed in a constant capacity type, and the branch portions (6a), (6b), (6) of the exhaust passage (6) are formed.
c) Each is equipped with an automatic pressure regulator (B) to maintain the internal pressure of each air-conditioned space (1a) to (1c) within a set range,
To maintain negative internal pressure in each air-conditioned space (1a) to (1c) so that air containing organisms and pollutants does not flow out, or to prevent contamination of the space due to inflow of external air It was configured to keep the internal pressure at positive pressure.

[Problems to be solved by the invention]

However, since the exhaust amount of the exhaust fan (35) is constant, for example, opening and closing the door of the air conditioning target space (1a), (1b) or (1c), or exhausting the air conditioning target space (1a) to (1c) If the correlation of the exhaust pressure loss from each of the air-conditioned spaces (1a) to (1c) changes due to clogging of the filter installed in the mouth, etc., the exhaust path branching parts (6a), (6b) with large pressure loss
Or, in the pressure adjusting damper (14) of (6c), the opening becomes too large and the pressure control function becomes insensitive, or the opening becomes too small and the pressure control function becomes too sensitive. The fluctuation range of the pressure became large, and there was room for further improvement.

An object of the first aspect of the present invention is to make it possible to accurately realize a constant internal pressure in all air-conditioned spaces.

An object of the second invention is to further improve the air conditioner according to the first invention to make it convenient for interrupting exhaust from a part of the air-conditioned space for disinfection, for example. .

[Means for solving problems]

The characteristic configuration of the first aspect of the present invention is to form a variable capacity exhaust fan in which a plurality of air conditioning target spaces are connected in parallel by an exhaust path, and to provide branching parts respectively connected to the air conditioning target space in the exhaust path. An opening detection sensor is attached to each pressure adjustment damper of the automatic pressure regulator provided to keep the internal pressure of the air-conditioned space constant, and whether or not all of the detected openings by these sensors are within the set intermediate opening range. Determination means for determining whether
And an automatic exhaust air amount adjusting means for adjusting the exhaust air amount of the variable displacement exhaust fan so as to maintain all the detected opening amounts in the set intermediate opening range based on the information from the determining means. And its effects are as follows.

[Action]

In other words, in any of the air-conditioned spaces, the internal pressure decreases due to opening of the door or filter clogging, and the automatic pressure regulator for the air-conditioned space increases the opening of the pressure adjustment damper to keep the internal pressure within the set range. Or, the opening of the pressure adjusting damper is decreased or increased in order to maintain the internal pressure within the set range in the automatic pressure regulator for the other air-conditioned space, and some of those dampers are set to be smaller than the set intermediate opening range. When it becomes larger or smaller, the exhaust volume of the variable displacement exhauster is automatically increased or decreased by the determination means and the exhaust air volume automatic adjustment means based on the information from the opening detection sensor, and the internal pressure and the opening degree of the damper are increased. Both are maintained within the set range.

Then, the setting intermediate opening range of the damper is appropriately set according to the model of the damper and the pressure adjusting characteristic so that the pressure change accompanying the opening change does not become insensitive or irritable and is moderately sensitive. As a result, the internal pressure of the air-conditioned space can be maintained in the set range accurately and easily.

〔The invention's effect〕

As a result, it has become possible to provide an air conditioner that is much more excellent in terms of performance, in which an optimum internal pressure maintenance state according to the situation can be easily and reliably obtained in each air-conditioned space.

[Means for solving problems]

The characteristic configuration of the present second invention is, in addition to the characteristic configuration of the present first invention, provided with an exhaust target selecting operation unit for stopping exhaust to a part of the air conditioning target space, and the exhaust target selecting operation unit. Based on the information from, the information selection instructing means for instructing the determination means to exclude the detection opening from the one for the air-conditioned space in the exhaust stopped state among the sensors from the determination is provided. , Its effects are as follows.

[Action]

That is, assuming that the exhaust from the part of the air-conditioned space is stopped in the air conditioner according to the first aspect of the present invention, the pressure adjusting damper of the automatic pressure regulator for the air-conditioned space is fully opened or fully closed to maintain the pressure. State, and based on the information from the sensor for detecting the opening of the damper, the displacement of the variable displacement type exhaust fan is maximized or minimized by the determination means and the exhaust air volume automatic adjustment means, and internal pressure control is completely impossible. become.

However, according to the second aspect of the present invention, not only the exhaust target selection operation unit can easily stop the exhaust of a part of the air conditioning target space, but at that time, the information selection instructing unit causes the determining unit to stop the exhaust target. Automatically instructed to exclude the detected opening degree from the sensor for the space and target only the detected opening degree from the sensor for the air-conditioned space in the exhaust and set all the detected opening degrees to the set intermediate opening range. Therefore, the internal pressure control of the air-conditioned space in the exhaust gas can be reliably performed in a predetermined manner.

〔The invention's effect〕

As a result, a good internal pressure maintenance state can be reliably achieved even when the exhaust of a part of the air conditioning target space is stopped, and for example, a convenient air conditioning device is provided for disinfecting a part of the air conditioning target space in the exhaust stopped state. I can do it now.

〔Example〕

 Next, an embodiment is shown in FIG. 1 and FIG.

A plurality of air-conditioned spaces (1a), (1b), (1c) are connected in parallel to the air conditioner (2) and the variable capacity blower (3) through the air supply passage (4), and at the same time a variable capacity exhauster is connected. The exhaust passage (6) is connected in parallel to (5), and the air-conditioned spaces (1a) to (1c)
It is configured to force each one.

Air-conditioning target space (1a) to (1c) in the air supply passage (4)
An automatic flow rate regulator (A) is provided in each of the separately connected branch portions (4a), (4b), (4c), and the flow rate detection sensor (S ₁ ) is detected in each automatic flow rate regulator (A). In order to maintain the flow rate within the range set by the flow rate setting device (7) of the system controller (C), the opening degree of the flow rate adjusting damper (8) is adjusted by the automatic operation section (9).

An opening detection sensor (S ₂ ) is attached to each of the flow rate adjusting dampers (8), and a judgment means (10) for judging the largest opening detected by the sensors (S ₂ ) and the judgment. In order to maintain the maximum detected opening notified by the means (10) within the opening range set by the opening setter (11) of the system controller (C), the supply amount of the variable capacity blower (3) is adjusted. The system controller (C) is provided with an automatic air flow rate adjusting means (12) for adjustment.

In other words, the damper for adjusting the flow rate (8) is set to an appropriate value by which the flow rate adjustment is sensitive and the pressure loss is low with the opening degree set by the opening setting device (11).
Is set according to the characteristics of the air conditioning system, so that the amount of air supplied to each of the air-conditioned spaces (1a) to (1c) can be accurately fixed and the power cost of the blower (3) can be reduced. .

Air-conditioning target spaces (1a) to (1c) in the exhaust path (6)
An automatic pressure regulator (B) is provided in each of the separately connected branch portions (6a), (6b), (6c), and in each of the automatic pressure regulators (B), air-conditioned spaces (1a) to (1c) The first and second pressure adjusting dampers (14) arranged in parallel so that the pressure detected by the pressure detecting sensor (S ₃ ) against the inside is maintained within the range set by the pressure setting device (13) of the system controller (C). , (15) are configured so that their opening degrees are adjusted by the automatic operation section (16).

The first pressure adjustment damper (14) is formed so that the pressure adjustment width from the fully open to the fully closed is large, and the second pressure adjustment damper (15) is formed so that the pressure adjustment width from the fully closed to the fully open is extremely small. However, the automatic operation section (16) roughly adjusts the pressure by the first pressure adjusting damper (14) and precisely adjusts the pressure by the second pressure adjusting damper (15).

An opening degree detection sensor (S ₄ ) is attached to each of the first pressure adjusting dampers (14), and all the opening degrees detected by these sensors (S ₄ ) are set by the system controller (C). Based on the information from the determination means (18) for determining whether or not it is within the set intermediate opening range according to the above, all detected openings are maintained within the set intermediate opening range. The system controller (C) is provided with an automatic exhaust air amount adjusting means (19) for adjusting the exhaust air amount of the variable capacity exhaust fan (5).

That is, the intermediate pressure set by the opening setting device (17) is set to an appropriate value that does not make the pressure adjustment excessively sensitive or insensitive, according to the characteristics of the first pressure adjustment damper (14), The internal pressure of each of the air-conditioned spaces (1a) to (1c) is configured to be reliably and accurately adjusted.

Shut-off valves (20) and (21) are provided in all of the branch portions (4a) to (4c) of the air supply passage (4) and the branch portions (6a) to (6c) of the exhaust passage (6) to provide an air conditioning target space. (1a) to (1
c) The shutoff valves (20) and (2
1) A supply / exhaust stop operation unit (23) for opening and closing is provided, and information from the supply / exhaust stop operation unit (23) is used to supply / exhaust a part (1a), (1b) or (1c) of the air-conditioned space. The first timer (24) that suspends the power for a certain time and the outlet (2
5) Air-conditioned space by heating type fumigator connected to (1
The system controller (C) is provided with a second timer (26) for continuing the disinfection in (a), (1b) or (1c) for a certain period of time.

Stop air supply in the opening detection sensor (S ₂ ) of the flow rate adjustment damper (8) for a certain period of time according to a command from the first timer (24) based on information from the air supply / exhaust stop operation unit (23) Information selection instructing means for instructing the determining means (10) for determining the maximum opening so as to exclude the detected opening from the air-conditioned space (1a), (1b) or (1c) in the state (27) is provided in the system controller (C) so that the air supply amount of the blower (3) is reduced when the air supply to some of the air-conditioned spaces (1a), (1b) or (1c) is stopped. Is configured.

The exhaust stop state of the opening detection sensor (S ₄ ) of the pressure adjustment damper (14) over a certain period of time according to a command from the first timer (24) based on information from the air supply / exhaust stop operation unit (23) Information selection instructing means for instructing the determining means (18) for the set intermediate opening range so as to exclude the opening detected from the air-conditioned space (1a), (1b) or (1c) (28) is provided in the system controller (C) so that the pressure control system can be prevented from becoming uncontrollable due to the stop of exhaust from some of the air-conditioned spaces (1a), (1b) or (1c). Configured.

A circulation path (29) for returning a part of the exhaust gas is provided from the downstream side of the exhaust fan (5) to the upstream side of the air conditioner (2), and the throttle valve (30) of the air supply path (4) and the exhaust path (6). , (31) and the circulation path (29), the automatic valve operating section (33) for operating the on-off valve (32), and the automatic valve operating section (33) based on information from the air supply / exhaust stop operating section (23). The system controller (C) is equipped with a third timer (34) for instructing the operation of both throttle valves (3
0), (31) to a small opening and the on-off valve (32) fully open,
Also, both throttle valves (30), (31) are opened for a certain period of time immediately before the supply / exhaust state is switched from the supply / exhaust stopped state to a part of the air-conditioned space (1a), (1b) or (1c). The third timer (34) so that the on-off valve (32) is fully closed.
Instructed by the automatic valve operating unit (33), the throttle valve (30),
The (31) and the on-off valve (32) are configured to be operated.

In other words, when air is supplied to and exhausted from all the air conditioning target spaces (1a) to (1c), a part of the exhaust gas is circulated to improve thermal efficiency and reduce the air conditioning load. Immediately after 1b) or (1c) is switched from the air supply / exhaust stop state to the air supply state, disinfectant-containing air or dirty air from the air conditioning target space (1a), (1b) or (1c) for resuming air supply / exhaust The air is configured not to flow into the other air-conditioned space (1a), (1b) or (1c) from the circulation path (29).

In short, when the air supply / exhaust stop operation unit (23) issues an air supply / exhaust stop instruction to some of the air conditioning target spaces (1a), (1b) or (1c), the air conditioning target spaces (1a), (1b) or (1c) is configured to be automatically treated as follows.

(A) The shutoff valves (20) and (21) on the air supply side and the air discharge side are slowly closed to stop the air supply and exhaust.

(B) The outlet (25) is energized after supply / exhaust is stopped, and fumigation is performed on the air-conditioned space (1a), (1b) or (1c)
The inside is sterilized.

(C) Fumigation is stopped after a certain time.

(D) The circulation path (29) is shut off before the supply and exhaust air is restarted.

(E) After shutting off the circulation path (29), the shutoff valves (20) and (21) on the air supply side and the exhaust side are slowly opened, and the air supply and exhaust is resumed.

(F) When the supply and exhaust of gas is resumed and a certain period of time has passed, the circulation path (29) is fully opened and returns to the normal state.

[Another embodiment]

 Next, another embodiment will be described.

The air-conditioned space (1a) to (1c) may be, for example, a biotechnology-related laboratory, a laboratory animal breeding room, a working clean room, or any other type, and the number of spaces can be appropriately selected for the purpose of air conditioning. ,ventilation,
Various changes such as air purification, room pressure adjustment, cooling and heating are possible. The air conditioner (2) may be omitted at the time of ventilation and room pressure adjustment.

The forced air supply structure and the exhaust gas circulation structure may be omitted in some cases.

When forming the exhaust fan (5) in a variable capacity type, it is possible to select an appropriate specific structure such as changing the rotational speed and the vane angle.

Automatic pressure regulator (B) and system controller (C)
The specific configuration and control method can be appropriately selected, and for example, only the damper (14) may be used.

In the first aspect of the present invention, the air supply / exhaust stop operation section (23) and the information selection instructing means (28) may be omitted.

In the second aspect of the present invention, the air-conditioning target space (1a) to (1a)
In order to form a means for stopping the exhaust for a part of c), for example, the system controller (C) can be operated so that it can be appropriately changed in a specific configuration, and these can be changed by the operation unit (23) for selecting an exhaust target. ) Collectively.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a conceptual diagram of the apparatus, and FIG. 2 is a block diagram of a control system. Third
The figure is a partially omitted conceptual diagram of the conventional example. (1a), (1b), (1c) …… Air-conditioned space, (5) ……
Exhaust fan, (6) …… Exhaust path, (6a), (6b), (6c)…
… Branch part, (14) …… Damper, (18) …… Judgment means, (19) …… Automatic air flow rate adjustment means, (23) …… Exhaust target selection operation part, (28) …… Information selection instruction Means, (B)
...... Automatic pressure regulator, (S ₄ ) …… Sensor for detecting opening.

Claims (2)

[Claims] 1. A plurality of air conditioning target spaces (1a), (1b), (1
c) is connected in parallel to the exhaust fan (5) through the exhaust path (6), and the air conditioning target spaces (1a) to (1) in the exhaust path (6) are connected.
In each of the branched portions (6a), (6b), (6c) separately connected to c), an automatic pressure regulator (B) for maintaining the internal pressure of the air-conditioned space (1a) to (1c) within a set range. ) Is provided, the exhaust fan (5) is formed in a variable capacity type, and an opening detection sensor (S ₄ ) is provided in each of the pressure adjustment dampers (14) of the automatic pressure regulator (B). ) Is attached, and a determination means (18) for determining whether or not all the opening degrees detected by these sensors (S ₄ ) are within the set intermediate opening range, and based on the information from the determination means (18). In addition, an air conditioner provided with automatic exhaust air volume adjusting means (19) for adjusting the exhaust air volume of the variable capacity exhaust fan (5) so that all the detected opening openings are maintained within the set intermediate opening range. 2. A plurality of air conditioning target spaces (1a), (1b), (1
c) is connected in parallel to the exhaust fan (5) through the exhaust path (6), and the air conditioning target spaces (1a) to (1) in the exhaust path (6) are connected.
In each of the branched portions (6a), (6b), (6c) separately connected to c), an automatic pressure regulator (B) for maintaining the internal pressure of the air-conditioned space (1a) to (1c) within a set range. ) Is provided, the exhaust fan (5) is formed in a variable capacity type, and a pressure adjustment damper (14) of the automatic pressure regulator (B) is provided with an opening detection sensor (S _4). ) Is attached, and a determination means (18) for determining whether or not all the opening degrees detected by these sensors (S ₄ ) are within the set intermediate opening range, and based on the information from the determination means (18). In order to maintain all the detected openings in the set intermediate opening range, an exhaust air volume automatic adjusting means (19) for adjusting the exhaust volume of the variable capacity exhaust fan (5) is provided, Part (1a), (1b)
Alternatively, an exhaust target selection operation unit (23) for stopping exhaust to (1c) is provided, and based on the information from the exhaust target selection operation unit (23), the exhaust stop state of the sensor (S ₄ ) is detected. An information selection instructing means (28) is provided to instruct the determining means (18) to exclude from the determination object the opening degree detected from the air-conditioned space (1a), (1b) or (1c). Air conditioner.