JPH0814404B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to connecting a plurality of air-conditioned spaces to an air conditioner in parallel with an air supply path and to an air blower with an exhaust path in parallel. A circulation path that returns a part of the exhaust gas to the air conditioner
The present invention relates to an air conditioner in which a cutoff valve is provided in each branch portion of the air supply passage and the exhaust passage that is separately connected to the air conditioning target space, and an open / close valve is provided in the circulation passage.

[Conventional technology]

Conventionally, as shown in FIG. 3, branch portions (4a), (4b), (4c) or (6a) of the air supply passage (4) and the exhaust passage (6),
Shut-off valves (20), (21) provided in (6b), (6c), and
The on-off valve (32) of the circulation path (29) is configured to be opened and closed by manual operation, respectively, and the air-conditioned space (1a) for stopping air supply and exhaust,
The air supply side and exhaust side cutoff valves (20) and (21) for (1b) or (1c) are artificially fully closed, and the air conditioning target space (1a), (1b) or (1c ) Is subjected to necessary treatment such as fumigation, and when the treatment is completed, first the on-off valve (32) of the circulation path (29) is fully closed, and then the air-conditioned space (1a) in the air supply / exhaust stopped state. , (1b) or (1c), the air supply / exhaust is restarted by the artificial opening operation of the shutoff valves (20), (21) on the air supply side and the exhaust side, and the air conditioning target space (1a), (1b) for restarting the air supply / exhaust ) Or (1c) is contaminated with disinfectant-containing air, etc.
a), (1b) or (1c) is prevented, and the air conditioning target space (a), (1b) or (1
When the exhaust gas from c) is clean, the on-off valve (32) of the circulation path (29) is manually opened to reduce the load on the air conditioner (2) by exhaust gas circulation.

[Problems to be solved by the invention]

However, the shut-off valves (20) and (21) on the air supply side and the exhaust side are fully closed and opened, and the on-off valve (3
Since it is necessary to artificially perform all of the fully closed operation and the open operation for 2), the valve operation is troublesome,
Also, due to an error in the timing of fully closing or opening the open / close valve (32) of the circulation path (29), unexpectedly contaminated air flows into the air conditioning target space (1a), (1b) or (1c). Alternatively, there is a risk that the exhaust air circulation will be stopped for an unnecessarily long time and the air conditioning load reduction will be impaired, and there is room for further improvement.

An object of the present invention is to simplify the operation when suspending and resuming supply and exhaust of a part of the air-conditioned space,
This is to ensure that the operation of the on-off valve of the circulation path can be performed with good timing, and that it is possible to reliably prevent pollution in the air-conditioned space and reduce the air-conditioning load.

[Means for solving problems]

A characteristic configuration of the present invention is that an air supply / exhaust target selecting operation unit that stops air supply / exhaust for a part of a plurality of air conditioning target spaces connected in parallel to an air conditioner and an exhaust fan is provided on the air supply side of each air conditioning target space. A shut-off valve provided on the exhaust side and an on-off valve of a circulation path that returns a part of the exhaust gas from the exhaust path to the air conditioner are linked by a linking mechanism, and the linking mechanism is connected to the supply / exhaust target selecting operation section. The shutoff valve operating means for fully closing and opening the shutoff valve on the air supply side and the shutoff valve on the exhaust side with respect to the air-conditioning target space for which air supply and exhaust should be stopped by information, and the shutoff valves on the air supply side and the exhaust side. This is because the on-off valve operating means for fully closing the on-off valve before opening the valve and opening the on-off valve after a set time after the full closing is provided, and the effect thereof is as follows.

[Work]

That is, in order to stop the air supply / exhaust for a part of the air-conditioned space for disinfection and restart the air supply / exhaust after the disinfection is completed, in the air supply / exhaust target selection operation unit, the operation device for stopping the air supply / exhaust is operated. By operating only once or by performing the operation twice together with the operation of the supply / exhaust resuming operation tool, the shutoff valve operating means fully closes and opens the shutoff valves on the air supply side and the exhaust side. In addition, the on-off valve operating means can automatically and reliably perform the fully closing operation and the opening operation of the on-off valve of the circulation path at a predetermined timing.

Therefore, the above-mentioned conventional technique requires as many as six valve operations, but according to the present invention, only one or two operations are required, and the operation is extremely simple. The operation can be performed reliably and at a good timing, and the function of reducing the air conditioning load by exhaust gas circulation can be fully exerted while reliably preventing the trouble that dirty exhaust gas unexpectedly flows into the air conditioning target space. .

〔The invention's effect〕

As a result, not only can the air conditioning load be reduced, but it is also advantageous in terms of operation when interrupting the supply and exhaust of part of the air conditioning target space for disinfection, etc. In addition, it has become possible to provide an air conditioning system that is much more excellent in operability.

〔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).

Determining means (10) for determining the maximum opening degree detected by these sensors (S ₂ ) by attaching a closing degree detecting sensor (S ₂ ) to each of the flow rate adjusting dampers (8), and its determination 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 (1) and (1a) to (1c), the amount of air supplied to each of the target 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 adjusting damper (14) is formed so that the pressure adjusting range from the fully closed to the fully opened is large, and the second pressure adjusting damper (15) is formed so that the pressure adjusting range from the fully opened to the fully opened 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
Supply / exhaust air supply / exhaust for a part (1a), (1b) or (1c) of the air-conditioned space based on information from the air supply / exhaust stop operation part (23) Timer (24) and outlet (25) to suspend the power for a certain time
Air-conditioned space (1a) by heating type fumigator connected to
The second that discontinues disinfection in (1b) or (1c) for a certain period of time
A timer (26) is provided in the system controller (C).

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 on-off valve (32) of the circulation path (29), and an automatic valve operating section (33), and
The system controller (C) is provided with a third timer (34) for instructing the automatic valve operating unit (33) to operate based on the information from the air supply / exhaust stop operating unit (23), and normally, both throttle valves (30) are provided. , (31) to a small opening and the on-off valve (32) to full opening, and a part of the air conditioning target space (1a), (1b) or (1
The third throttle valve (30), (31) is opened to a large opening and the on-off valve (32) is fully closed for a certain period of time immediately before c) is switched from the supply / exhaust stop state to the supply / exhaust state. The throttle valves (30) and (31) and the opening / closing valve (32) are configured to be operated by the automatic valve operating unit (33) according to an instruction from the timer (34).

In other words, when air is supplied to and exhausted from all air-conditioned spaces (1a) to (1c), part of the exhaust gas circulation improves thermal efficiency and reduces the air-conditioning load. Immediately after (1b) or (1c) is switched from the air supply / exhaust stop state to the air supply / exhaust state, the air-conditioning target space (1a), (1b) or (1c) for resuming air supply / exhaust discharges air and dirt The air is configured so as 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)
Are 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 (32) is fully opened and returns to the normal state.

[Another embodiment]

 Next, another embodiment will be described.

When the shutoff valves (20), (21) on the air supply side and the exhaust side are automatically closed based on information from the air supply / exhaust stop operation section (23), the shutoff valves (20), (21) Prior to the valve closing, the flow rate adjusting damper (8) in the automatic flow rate regulator (A) of the supply / exhaust system is automatically closed at a slow speed based on the information from the supply / exhaust stop operation section (28), and Due to the pressure drop in the air-conditioned space (1a) to (1c),
The pressure adjusting dampers (14) and (15) in the automatic pressure regulator (B) of the system are automatically closed in a follow-up manner, and then both shutoff valves (20) and (21) are closed. The air supply / exhaust to the air-conditioned spaces (1a) to (1c) may be completely stopped.

That is, as described above, the flow rate adjusting damper (8) and the pressure adjusting dampers (14) and (15) are used as partial constituent devices of the intake side and exhaust side shutoff valves (20) and (21), respectively. If the flow rate adjusting damper (8) is automatically and slowly closed prior to closing the shutoff valves (20) and (21) in a state where it is also used, the original function of the automatic pressure regulator (B) By the follow-up valve closing operation of the pressure adjustment dampers (14) and (15) by the function, the pressure in the air-conditioned space (1a) to (1c) does not fluctuate significantly (causes damage to the room, etc.) The stop operation proceeds smoothly, and at the subsequent closing operation of both the shutoff valves (20) and (21), the flow rate adjusting damper (8) and the pressure adjusting dampers (14) and (15) are closed. Since the supply / exhaust volume has already been reduced to a small amount by the valve closing operation, these shutoff valves (20), (2 Even if there is a slight timing difference in the valve closing operation in 1), the pressure in the air-conditioned space (1a) to (1c) does not change significantly, and as a result, the supply / exhaust stop is extremely smooth as a whole. Becomes

Further, in the case of using a damper having a high airtightness for the flow rate adjusting damper (8) of the automatic flow rate adjuster (A) and the pressure adjusting dampers (14) and (15) of the automatic pressure adjuster (B). , The flow rate adjusting damper (8) also serves as the air supply side shutoff valve (20), and the pressure adjusting dampers (14) and (15) also serve as the exhaust side shutoff valve (21). Therefore, provision of a separate shutoff valve may be omitted.

The air-conditioned spaces (1a) to (1c) may be, for example, biotechnology-related laboratories, laboratory animal breeding rooms, work clean rooms, or any other type, and the number of spaces can be appropriately selected for the purpose of air conditioning. , Air purification, cooling and heating, or various changes such as room pressure adjustment and ventilation in addition to it, depending on the case, automatic flow rate regulator (A), automatic pressure regulator (B), air flow rate automatic adjustment configuration,
Part or all of the automatic air volume adjustment configuration may be omitted.

The supply / exhaust target selecting operation unit (23) can be appropriately changed in a specific configuration, for example, by being operated by the system controller (C).

The shutoff valves (20), (21) on the air supply side and the exhaust side for the air conditioning target space (1a), (1b) or (1c) for which air supply and exhaust should be stopped based on information from the air supply and exhaust target selection operation section (23) The means for operating can be appropriately changed, for example, by fully closing the shutoff valves (20) and (21) by instructing the fully closed operation and opening the shutoff valves (20) and (21) by the instructing open operation. Shut off the valve operation means (2
4) collectively.

Means for fully closing the on-off valve (32) before opening the shut-off valves (20), (21) and opening the on-off valve (32) after a set time after the full-close is, for example, the shut-off valve (20). ), (21) that operate based on the fully closed instruction operation, or those that have setting change means for adjusting the set time, etc., can be appropriately changed, and are collectively referred to as opening / closing valve operation means (33), (34). To do.

The throttle valves (30) and (31) may be fixed throttles or may be omitted.

[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 conceptual diagram of a conventional example. (1a), (1b), (1c) …… Air-conditioned space, (2) ……
Air conditioner, (4) ... Air supply passage, (4a), (4b), (4c) ...
… Branch part, (5) …… Blower, (6) …… Exhaust path,
(6a), (6b), (6c) …… Branch part, (20), (21)
…… Shut-off valve, (23) …… Operation part for selecting air supply and exhaust, (2
4) ... Shut-off valve operating means, (29) ... Circulation path, (32) ...
… Open / close valves, (33), (34) …… Open / close valve operating means.

Claims (1)

[Claims] 1. A plurality of air conditioning target spaces (1a), (1b), (1
c) is connected to the air conditioner (2) in parallel through the air supply passage (4) and is connected in parallel to the exhaust fan (5) through the exhaust passage (6), and the exhaust passage (6) is connected to the air conditioner (2). A branch (4a) provided with a circulation path (29) for returning a part of exhaust gas and separately connected to the air conditioning target spaces (1a) to (1c) of the air supply path (4) and the exhaust path (6). , (4b), (4c) or (6a), (6
b) and (6c) are provided with shutoff valves (20) and (21), respectively, and an opening / closing valve (32) is provided in the circulation path (29), which is a part (1a) of the air conditioning target space. ), (1b) or (1c)
Air supply / exhaust target selection operation unit (2
3) the shutoff valves (20), (21) and the open / close valve (32)
To the air conditioning target space (1a), (1b) or (1c) to be stopped by the information from the air supply / exhaust target selection operation section (23). Side shutoff valve (20) and exhaust side shutoff valve (21)
And a shutoff valve operating means (24) for fully closing and opening the shutoff valve (32) before opening the shutoff valves (20), (21) on the air supply side and the exhaust side. An on-off valve operating means (33) for opening the on-off valve (32) after a set time from the fully closing,
Air conditioner equipped with (34).