JP2914739B2 - Air conditioning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The first and second inventions are related to an air passage configuration in which a sub fan is interposed in a connection air passage connecting a main fan and a target room, and a sub fan is started. A sub-fan control means for starting and gradually increasing the output of the sub-fan on the basis of the command, and for gradually decreasing and stopping the output of the sub-fan on the basis of a sub-fan stop command; The present invention relates to an air conditioner that suppresses a sudden change in room pressure of a target room due to start and stop of a sub fan by start / stop control.

[Conventional technology]

In this type of air conditioner (see FIG. 1), activation and activation of the sub-fan (8) by the sub-fan control means (26) are performed.
Along with the stop control, the main fan (5) is activated in conjunction with the activation of the sub-fan (8) (in the example of FIG. 1, the activation of the first one of the sub-fans (8)). A fan link control for stopping the fan (8) in cooperation with the stop (in the example of FIG. 1, the last one of the sub-fans (8)) is performed, and the connection air path (3) The opening / closing damper (24) of the intervening device is opened in association with the activation of the corresponding sub-fan (8) and closed in association with the stop of the corresponding sub-fan (8). Often.

However, in the conventional fan link control and damper link control, as shown in FIGS. 4 and 5, the start operation time (f1) of the main fan (5) and the opening operation start time of the opening / closing damper (24) ( d1) corresponds to the start time (a) of the sub-fan (8) (that is, the start time of the sub-fan start control), and the stop operation time (f2) of the main fan (5) and the opening / closing damper (24) At the start of the closing operation (d2)
Only corresponds to the stop time (b) of the sub-fan (8) (ie, the completion time of the sub-fan stop control), and furthermore, the main fan (5) in response to the main fan starting operation. Of the main fan (5) from the stop state to the steady output state (so-called start-up characteristic) and the main fan (5) from the steady output state to the stop state in response to the main fan stop operation. The output reduction characteristic of the main fan (5), the opening operation characteristic of the opening / closing damper (24) from the fully closed state to the predetermined opening degree for the opening operation and the closing operation No consideration has been given to the closing operation characteristics of the open / close tamper (24) until the open / close damper (24) is fully closed.

[Problems to be solved by the invention]

In the above-described conventional fan linkage control and damper linkage control, the sub-fan start / stop control is used to suppress the sudden change in the room pressure of the target room (1) due to the start / stop of the sub-fan (8). The output of (8) is gradually increased.
Despite the decrease, the start of the sub fan
The start / stop of the main fan (5) linked to the stop affects the opening and closing of the open / close damper (24) linked to the start / stop of the sub-fan in the main fan operating state,
Target room (1) when starting / stopping sub-fan (8)
In this regard, there is still room for improvement in sufficiently suppressing and preventing abrupt room pressure fluctuations caused by the start / stop of the sub-fan (8).

That is, in the conventional fan link control, as shown in FIG. 4 described above, the state in which the main fan (5) started to be operated at the start point (a) of the sub-fan start control suddenly changes from the stopped state to the steady output state. The output of the main fan (5), which is stopped at the completion of the sub-fan stop control (b), suddenly decreases from the steady output state to the stopped state, so that the sub-fan (8) itself gradually increases. Start of the sub fan (8)
When the sub-fan is stopped, the air pressure of the connecting air path (3) changes rapidly under the influence of the rapid output change of the main fan (5). This is a factor that causes the tendency of the room pressure to fluctuate sharply.

Further, in the conventional damper linkage control, as shown in FIG. 5 described above, the opening / closing damper (24) whose opening operation is started at the start time (a) of the sub-fan activation control is shifted from the fully closed state to a predetermined opening degree. The opening degree rapidly increases, and the closing operation is started at the time (b) when the sub-fan stop control is completed.
4) the opening is rapidly reduced from the predetermined opening to the fully-closed state. Therefore, when the main fan (5) is in operation, the blowing pressure of the main fan (5) increases the opening / closing damper (24). When the sub-fan (8) itself changes its output gradually, the opening and closing of the sub-fan (8) causes the opening and closing of the opening and closing damper (24). The opening / closing of the main fan causes a sudden interruption of the main fan blowing pressure, which causes a sudden change in the air passage pressure of the connection air passage (3). This sudden change in the air passage pressure causes the room when the sub-fan starts and stops. This is a factor that causes the rapid fluctuation tendency of the pressure to remain.

An object of the first and second aspects of the present invention is to solve the above-mentioned problem by adopting a rational control structure, and to effectively suppress and prevent a sudden change in room pressure when starting and stopping the sub-fan. The point is to achieve.

(First Invention) [Means for Solving the Problems] A first characteristic configuration of an air conditioner according to the first invention is that a sub-fan is interposed in a connection air passage connecting a main fan and a target room, and a sub-fan is provided. A configuration is provided in which a sub-fan control unit is provided to start the sub-fan and gradually increase the output based on a fan start command, and to gradually reduce and stop the output of the sub-fan based on a sub-fan stop command. During the start control of the sub-fan, the main fan is started with the start of the sub-fan, and the output of the main fan is gradually increased so as to be synchronized with the increase in the output of the sub-fan, and During the stop control of the sub-fan, the output of the main fan is gradually decreased so as to be synchronized with the decrease in the output of the sub-fan, and the main fan is stopped by the stop of the sub-fan. There that is provided with a fan associated control means for stopping § down, its operations and effects are as follows.

(Operation)

That is, in the first characteristic configuration of the first invention (see FIG. 2), the main fan is started in accordance with the start of the sub-fan, and then the sub-fan is controlled by the sub-fan control means of the sub-fan control means. Since the output of the main fan is gradually increased so as to synchronize with the gradual increase of the output, the fan stop is also tuned to the gradual decrease of the output of the sub-fan due to the sub-fan stop control of the sub-fan control means. As described above, since the output of the main fan is gradually reduced, and finally the main fan is stopped with the stop of the sub fan, regardless of the start and stop of the main fan linked to the start and stop of the sub fan, When the fan is started / stopped, the air passage pressure of the connection air passage is changed gradually (that is, gradually) while being synchronized with the gradual output change of the sub-fan. It is possible.

〔The invention's effect〕

As a result, according to the first characteristic configuration of the first aspect of the present invention, abrupt room pressure fluctuations at the time of starting / stopping the sub-fan can be prevented while avoiding the adverse effect of starting / stopping the main fan associated with starting / stopping of the sub-fan. In this type of air conditioner, which employs a type in which the main fan is started and stopped in conjunction with the start and stop of the sub-fan, various inconveniences due to abrupt room pressure fluctuation ( For example, damage to walls, ceilings, doors, and the like due to room pressure fluctuations, and a decrease in the function of maintaining cleanliness in a clean room, etc.) can be more reliably prevented.

[Second characteristic configuration of the first invention] A second characteristic configuration of the air conditioner according to the first invention is that the connection air passage branches in parallel from the main fan to a plurality of the target rooms. An air passage, wherein the fan link control means controls the start of the main fan in association with the start control of the first one of the sub-fans interposed in each of the connection air passages; and The main fan is configured to stop and control in cooperation with the stop control for the last one of the sub-fans. If even one unit is in operation, operate the main fan,
While maintaining the main fan function for a plurality of sub-fans (in other words, the main fan function for a plurality of target rooms), the main fan is stopped only when all of the plurality of sub-fans are stopped. The first characteristic configuration of the first characteristic configuration is provided at the time of starting the first one of the sub-fans together with the linked start and at the time of stopping the last one of the sub-fans together with the linked stop of the main fan. The operation and effect can be reliably obtained.

(Second Invention) [Means for Solving the Problems] A characteristic configuration of an air conditioner according to the second invention is that a sub-fan is interposed in a connection air path connecting a main fan and a target room, and a sub-fan start command is issued. The sub-fan control means for activating the sub-fan and gradually increasing the output based on the sub-fan, and gradually decreasing the output and stopping the sub-fan based on the sub-fan stop command; An opening / closing damper is interposed in the air passage, and at the time of the start control of the sub-fan, the opening operation of the opening / closing damper is started with the start of the sub-fan, and the opening degree of the opening / closing damper is increased to increase the output of the sub-fan. Gradually increasing so as to synchronize, and at the time of the stop control of the sub-fan, gradually decreasing the opening degree of the opening / closing damper so as to synchronize with the output decrease of the sub-fan, There that is provided with a damper linkage control means for closing said opening and closing dampers with the stop of Bufan, its functions and effects are as follows.

(Operation)

That is, with the above-described characteristic configuration of the second invention (see FIG. 3), the opening operation of the opening / closing damper is started with the activation of the sub-fan, and subsequently, the sub-fan is controlled by the sub-fan activation control of the sub-fan control means. Since the opening degree of the opening / closing damper is gradually increased so as to synchronize with the gradual increase in the output of the fan, the closing operation of the opening / closing damper is also performed gradually by the sub-fan stop control of the sub-fan control means. The opening degree of the opening / closing damper is gradually decreased so as to synchronize with the output reduction, and finally the opening / closing damper is closed with the stop of the sub-fan. The effect of the air pressure of the main fan on opening and closing will gradually increase and decrease so as to synchronize with the gradual output change of the sub-fan. Regardless of the opening / closing of the opening / closing damper linked to the start / stop of the sub-fan in the operating state, the air passage pressure of the connecting air path is synchronized with the gradual output change of the sub-fan when the sub-fan starts / stops. It can be changed gradually (ie, slowly).

〔The invention's effect〕

As a result, according to the characteristic configuration of the second aspect of the present invention, the adverse effect of the opening / closing damper opening / closing operation linked to the start / stop of the sub-fan (specifically, the adverse effect of intermittent main fan blowing pressure due to opening / closing of the opening / closing tamper) is avoided. In this state, a sudden change in the pressure change at the time of starting and stopping the sub-fan can be extremely effectively suppressed and prevented, and as a result, a type in which the opening / closing damper is opened and closed in conjunction with the starting and stopping of the sub-fan is adopted. In air-conditioning equipment, various inconveniences due to abrupt room pressure fluctuations (damage to walls, ceilings, doors, etc. due to room pressure fluctuations, and a decrease in the clean maintenance function in a clean room) can be more reliably prevented.

〔Example〕

 Next, an embodiment will be described.

FIG. 1 shows an equipment configuration of an air conditioner for a plurality of clean rooms (1), wherein a main outside air passage (2) is connected to each of a plurality of clean rooms (1) via a branch air passage (3), and A main air conditioner (4) for adjusting the temperature and humidity of the taken-in outside air and a main fan (5) are interposed in the main outside air passage (2), and each of the branch air passages (3) has:
A sub air conditioner (7) for adjusting the temperature and humidity of a combined air of the outside air whose temperature and humidity has been adjusted in advance by the main air conditioner (4) and the return air led from the clean room (1) through the return air passage (6); , And a sub fan (8).

(9) Open the air supply amount adjustment tank (12) for each clean room (1) so as to maintain the air supply amount to the clean room (1) detected by the air supply amount sensor (10) at a set value. It is an air supply controller that controls the degree,
(13) Opening control of a room pressure adjusting damper (14) for each of the clean rooms (1) so that the differential pressure inside and outside the clean room (1) detected by the differential pressure sensor (11) is adjusted and maintained at a set value. It is a room pressure controller to perform.

(15) adjusts and maintains the air passage pressure of the main outside air passage (2) detected by the main pressure sensor (16) at a set value,
An outside air passage pressure regulator for controlling the main fan (5) by an inverter. (17) sets an air passage pressure of each of the branch air passages (3) detected by the air supply side pressure sensor (18) to a set value. A branch air path pressure regulator for inverter-controlling each of the sub-fans (8) so as to maintain the adjustment, and (19) a return air path (6) for each return air path detected by the return-side pressure sensor (20) Return air fan (21) to adjust and maintain the airway pressure at the set value
These are return air path pressure regulators that control each of them by inverter.

A part of the return air from the clean room (1) is discarded outside the system through the exhaust air passage (22).

(23) is a system controller for each system of the branch air path (3). The system controller (23) responds based on a start / stop command given to each system of the branch air path (3). Starts and stops the sub-fan (8) and return air fan (21) of the system, and opens and closes the corresponding system that is interposed in the branch air passage (3) upstream of the sub-air conditioner (7). Damper (24)
Opens and closes in conjunction with the above fan start / stop, and
In addition to controlling the start / stop operation of the temperature / humidity adjusting operation for the sub air conditioner (7) of the corresponding system, it also controls the adjustment of the branch air passage pressure and the adjustment of the return air passage pressure when the corresponding system is in operation. .

Reference numeral (25) denotes a main controller. This main controller (25) is linked with each system controller (23) to start and stop the first branch system (3) for each system. With the start of one system, the main fan (5) is started and the temperature and humidity adjustment operation of the main air conditioner (4) is started,
In addition, the main fan (5) is stopped along with the stop of the last system, and the temperature and humidity adjustment operation of the main air conditioner (4) is stopped.

The system controller (23) and the main controller (25) will be described in further detail. The system controller (23) includes a sub-fan (8), a return air fan (21), and an opening / closing tamper of a corresponding system. As a control unit for (24), due to the effects of starting and stopping the following units, the sub fan (8), and the return air fan (21), not only the room pressure of the clean room (1) of the corresponding system but also the room pressure As shown in FIGS. 2 and 3, a sub-fan (8) and a return air fan are used to prevent a sudden and large fluctuation in the room pressure of the clean room (1) of the other system in the controlled state. Each of (21) is started based on a start command for the corresponding system, and the output is gradually increased at a predetermined output change rate until a steady output state, and
A fan control unit (26) for gradually reducing the output from a steady output state at a predetermined output change speed based on a stop command to the corresponding system and stopping the fan, a sub-fan (8) and a return air fan by the fan control unit (26) Despite gradually changing the output of (21), the sub-fan (8) and the return air fan (21) are linked to start / stop while the main fan (5) is operating. In order to prevent the tendency of the room pressure to suddenly change when the sub-fan (8) and the return air fan (21) start and stop due to the influence of the opening and closing of the opening and closing damper (24), FIG. As shown in the figure, when the start of the sub-fan (8) and the return air fan (21) of the corresponding system is controlled, the opening operation of the corresponding opening / closing damper (24) is performed with the activation of the sub-fan (8) and the return air fan (21). To start The opening degree of the open / close damper (24) is adjusted by the fan control unit (26).
Is gradually increased from fully closed to a predetermined opening at a predetermined opening change speed so as to synchronize with the gradual increase in output of the sub fan (8) and the return air fan (21), and During the stop control of the sub-fan (8) and the return air fan (21), the opening degree of the corresponding opening / closing damper (24) is adjusted by the fan control unit (26) to the sub-fan (8) and the return air fan (21).
Is gradually reduced from the predetermined opening at a predetermined opening change speed so as to synchronize with the gradual output decrease of the sub-fan (8) and the return air fan (21). A damper linkage control unit (27) for closing the opening / closing damper (24), and in a steady operation state of the corresponding system, an air supply amount adjustment damper (12) and a room pressure adjustment damper (14) of the corresponding system.
The control opening state is adjusted and maintained in a state that is suitable for reducing the power consumption of the sub-fan (8) and the return air fan (21) while maintaining high supply air amount adjustment accuracy and room pressure adjustment accuracy. Therefore, based on the opening degree information of the air supply amount adjustment damper (12) of the corresponding system, the setting value of the branch air passage pressure (3) which is the adjustment target value of the branch air passage pressure regulator (17) of the corresponding system. And, based on the opening degree information of the room pressure adjusting damper (14) of the corresponding system, the return air passage (6) which is the adjustment target value of the return air passage pressure regulator (19) of the corresponding system. An air path pressure control unit (28) for changing and adjusting the pressure set value is provided.

The fan control section (26) gradually changes the set value of the air path pressure of each of the branch air path pressure adjuster (17) and the return air path pressure adjuster (19) of the corresponding system at a predetermined change speed. Thus, the outputs of the sub-fan (8) and the return air fan (21) are gradually changed, and the damper linkage control section (27) controls the variable speed motor for driving the opening / closing damper (24). With the speed control, the opening / closing damper (24) is gradually opened and closed at a predetermined opening change speed.

Further, specifically, in the steady operation state, the air passage pressure control unit (28) is configured to control the air supply amount adjustment damper (12) of the corresponding system.
The air passage pressure setting value of the branch air passage pressure regulator (17) is set so that the opening degree of the maximum opening degree is maintained within the supply side set intermediate opening range (for example, 50% to 80%). And adjust the opening of the air pressure adjusting damper (14) of the corresponding system with the maximum opening to the return opening side set intermediate opening range (for example, 50%
(~ 80%) to maintain the return air line pressure regulator (19)
The air passage pressure setting value is changed and adjusted.

On the other hand, the main controller (25) includes a main fan (5).
In each branch airway system, although the outputs of the sub-fan (8) and the return air fan (21) are gradually changed by the fan control unit (26) at the time of start / stop, Instead, the start / stop is a start / stop involving the linked start or stop of the main fan (5) (that is, the movement of the first one of the branch airway systems or the stop of the last one). For this reason, it is possible to prevent the tendency of the room pressure to suddenly change when the sub-fan (8) and the return air fan (21) are started and stopped due to the influence of the linked start and the linked stop of the main fan (5). Therefore, based on the control information from each system controller (23), as shown in FIG. 2, the sub-fan (8) and the return air fan (21) at the time of starting the first one of the branch air passage systems. During startup control of the ) And return air fan (Start main fan (5) with the start of 21), the output of the main fan (5),
Gradually increasing to a steady output state at a predetermined output change rate so as to synchronize with the gradual increase in output of the sub fan (8) and the return air fan (21) by the fan control unit (26);
In addition, at the time of stop control of the sub-fan (8) and the return air fan (21) when the last one of the branch airway systems is stopped, the output of the main fan (5) is controlled by the fan control unit (2).
The sub-fan (8) and the return fan are gradually reduced from a steady output state at a predetermined output change speed so as to synchronize with the gradual decrease in output of the sub-fan (8) and the return air fan (21) according to (6). A fan link control unit (29) for stopping the main fan (5) when the air fan (21) stops is provided.

The fan link control unit (26) gradually changes the air passage pressure set value of the main outside air passage (2), which is the adjustment target value of the outside air passage pressure regulator (15), at a predetermined change speed. Thus, the output of the main fan (5) is gradually changed.

(Another embodiment)

 Next, another embodiment will be described.

(1) In the above-described embodiment, the connection air path (3) connecting the main fan (5) and the target room (1) is provided in parallel with the plurality of target rooms (1) from the main fan (5). Although the example shown is a plurality of branched air paths, the connection air path (3) may be a single air path.

(2) In the above-described embodiment, the example in which the main fan (5) and the sub fan (8) are on the air supply side with respect to the target room (1) has been described. The fan (8) may be on the exhaust side with respect to the target room (1).

(3) The target room (1) is not limited to the one provided with the air supply amount control means (9) and the room pressure control means (13), and the purpose of the room is not limited.

(4) When gradually changing the output / opening of the sub-fan (8), the main fan (5), and the opening / closing damper (24), the specific changing speed of the output / opening may be appropriately determined.

(5) In the above-described embodiment, an example in which both the first invention and the second invention are adopted has been described. However, a configuration in which the first invention or the second invention is adopted alone may be adopted.

Note that, for convenience of comparison with the drawings, reference numerals are set forth in the claims, but the first and second inventions are not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

1 to 3 show an embodiment, FIG. 1 is a schematic diagram of the equipment, and FIG.
FIG. 3 is a graph showing the stop control mode, and FIG. 3 is a graph showing the start / stop control mode of the sub-fan and the open / close control mode of the open / close damper. FIG. 4 is a graph showing a conventional start / stop control mode of a sub fan and a main fan, and FIG. 5 is a graph showing a conventional start / stop control mode of a sub fan and an open / close control mode of an opening / closing damper. (1) ... target room, (3) ... connection air path, (5) ... main fan, (8) ... sub-fan, (24) ... opening and closing damper, (26) ... sub-fan control means (27) ... damper linkage control means, (29) ... fan linkage control means.

Continuation of the front page (56) References JP-A-4-15442 (JP, A) Japanese Utility Model Application Sho 59-120840 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24F 11 / 02

Claims (3)

(57) [Claims] 1. A sub-fan (8) is interposed in a connecting air path (3) connecting a main fan (5) and a target room (1), and the sub-fan (8) is provided based on a sub-fan activation command. The air conditioner is provided with a sub-fan control means (26) for gradually increasing the output by starting the sub-fan (8) and for gradually decreasing and stopping the output of the sub-fan (8) based on the sub-fan stop command. During the start-up control of the sub-fan (8), the main fan (5) is started with the start-up of the sub-fan (8), and the output of the main fan (5) is output from the sub-fan (8). Increasing gradually to match the output increase,
Further, during the stop control of the sub-fan (8), the output of the main fan (5) is gradually decreased so as to be synchronized with the decrease in the output of the sub-fan (8). An air conditioner provided with fan link control means (29) for stopping the main fan (5) upon stopping. 2. The connection air path (3) is a branch air path branched in parallel from the main fan (5) to a plurality of the target chambers (1), and the fan link control means (29). )
Controls the activation of the main fan (5) in conjunction with the activation control of the first one of the sub-fans (8) interposed in each of the connection air paths (3); and The air conditioning system according to claim 1, wherein the main fan (5) is configured to stop and control the main fan (5) in conjunction with the stop control for the last one of the sub-fans (8). 3. A sub-fan (8) is interposed in a connecting air path (3) connecting a main fan (5) and a target room (1), and based on a sub-fan activation command, said sub-fan (8). The air conditioner is provided with a sub-fan control means (26) for gradually increasing the output by starting the sub-fan (8) and for gradually decreasing and stopping the output of the sub-fan (8) based on the sub-fan stop command. An opening / closing damper (24) is interposed in the connection air path (3), and the opening operation of the opening / closing damper (24) is performed in accordance with the activation of the sub-fan (8) during the activation control of the sub-fan (8). To gradually increase the opening of the opening / closing damper (24) so as to synchronize with the increase in the output of the sub-fan (8), and at the time of the stop control of the sub-fan (8), The opening of the damper (24) is adjusted to the output reduction of the sub fan (8). And gradually reduced to the sub-fan (8) of the open-close damper (24) to close the damper linkage control means with the stop (27) in Aru air conditioning equipment provided.