JPH02115648A - Double duct type air conditioner - Google Patents

Abstract

PURPOSE:To generally execute controls of room temperature and room pressure by one control system by regulating cold air supply amount and hot air supply amount to maintain the room temperature at a set temperature, and providing control means for regulating the total amount of the cold and hot air supplying amounts to maintain the room pressure at a set pressure. CONSTITUTION:A cold air side damper 6 is provided as cold air flowrate regulating means for regulating cold air supply amount Qc to a room 1 in a branch cold air supply passage 5 from a main cold air supply passage 2, and a hot air side damper 8 is provided as hot air flowrate regulating means for regulating hot air supply amount Qw to the room 1 in the branch hot air supply passage 7 from a main hot air supply passage 3. A constant air flow rate unit 10 for automatically maintaining a discharge amount to a set value is provided in a branch discharge passage 9. A room temperature sensor 11 and a room pressure sensor 12 are provided in the room 1, and a controller 13 for automatically operating the dampers 6, 8 on the basis of the detection information of the sensors 11, 12 to generally execute a feedback room temperature control for regulating to maintain the detected room temperature to a set temperature and a feedback room pressure control for regulating to maintain the detected room pressure to a set pressure by the regulation of supply and discharge amount balance is disposed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a room temperature adjusting means that adjusts the amount of cold air supplied from a cold air supply path to a target room, and The present invention relates to a double duct type air conditioner equipped with a hot air volume adjustment means for adjusting the volume of hot air supplied to a room.

[Conventional technology]

Conventionally, in the double duct type air conditioner as described above, in order to control the room temperature and room pressure, as shown in Fig. 4, the amount of cold air is adjusted so that the room temperature detected by the room temperature sensor (11) is maintained at the set temperature. A room temperature controller (14) for automatically operating the means (6) (cold air damper) and the hot air volume adjustment means (8) (warm air damper) is provided; A mixture air flow rate for adjusting the amount of air-fuel mixture supplied to the target room (1) is placed in the air path that mixes the cold air that has passed through the warm air and the warm air that has passed through the hot air volume adjustment means (8) and guides the mixture to the target room (1). An adjustment means (15) (supply air volume adjustment damper) is provided, and the adjustment means (15) is provided so as to adjust the supply/exhaust volume balance of the target room (1) to maintain the room pressure detected by the room pressure sensor (12) at the set pressure. A room pressure controller (1G) was provided to automatically operate the air-fuel mixture air flow rate adjusting means (15).

In the figure, (2) and (5) are the main and branch cold air supply paths, (3)
and 7) are main and branch hot air supply paths, (17) is a mixing box, and (10) is a constant air volume device that maintains the exhaust volume from the target room (1) at a set volume.

[Problem to be solved by the invention]

However, in the above-mentioned conventional system, in order to provide two independent control systems, a room temperature control system and a room pressure control system, there are also three air volume adjustment means, one for cold air, one for hot air, and one for air mixture.
Since multiple sets are required, there is a problem in that the overall configuration becomes complicated and the cost increases.

Moreover, since the room temperature control system and room pressure control system are each independent and are installed in series in the air supply system for the target room,
Room temperature control and room pressure control tend to interfere with each other in terms of air volume adjustment, resulting in a problem that the stability of surface control and control accuracy are likely to be impaired.

An object of the present invention is to enable room temperature control and room pressure control to be performed in a double duct type air conditioner while suppressing the above-mentioned problems.

[Means to solve the problem]

The characteristic configuration of the double duct type air conditioner according to the present invention is that, as a room temperature adjustment means, cold air is supplied from the cold air supply path to the target room.
In a double duct air conditioner equipped with a cold air volume adjustment means for adjusting the amount of cold air supplied and a hot air volume adjustment means for adjusting the amount of hot air supplied from the hot air supply path to the target room, the amount of cold air supplied and the amount of hot air supplied are The room temperature detected by the room temperature sensor is maintained at the set temperature by adjusting the ratio between Thus, a control means for automatically operating the cold air volume adjustment means and the hot air volume adjustment means is provided, and its functions and effects are as follows.

[For production]

In other words, the cold air volume adjustment means and hot air volume adjustment means as the room temperature adjustment means are also used as the air volume adjustment means for room pressure adjustment, which corresponds to the mixture air volume adjustment means in the conventional system. The air volume adjustment function by the and hot air volume adjustment means has two functions: a function to adjust the ratio between the cold air supply amount and the hot air supply amount, and a function to adjust the total amount of the cold air supply amount and the hot air supply amount. Taking advantage of something,
The cold air volume adjustment means and the hot air volume adjustment means are controlled by one control means based on the detection information of the room temperature sensor and the room pressure sensor so that the room temperature is adjusted by adjusting the ratio and the room pressure is adjusted by adjusting the total amount. The room temperature control that adjusts and maintains the detected room temperature at the set temperature and the room pressure control that adjusts and maintains the detected room pressure at the set pressure are performed in a unified manner using one control system.

[Effects of the Invention] As a result, room temperature control and room pressure control can be carried out with only one control system, and the air volume adjustment means installed in the air path as a terminal device in the control system can also be used as a cold air volume adjustment means and a temperature control system. Since only two sets are required, including the air volume adjustment means, the overall configuration is simpler and the equipment cost can be lowered compared to conventional systems.In addition, one control system allows the cooling air to be controlled in parallel. Since room temperature control and room pressure control are performed centrally by operating only the volume adjustment means and hot air volume adjustment means, mutual interference between room temperature control and room pressure control that occurs in conventional systems can be suppressed and avoided. ,
The stability of both controls and the control accuracy have also been improved.

〔Example〕

Next, an example will be described.

Figure 1 is a room that requires room pressure control, such as a clean room (1)
(2) is the main cold air supply path, (3)
) is the main hot air supply path, and (4) is the main exhaust path.

A branch cold air supply path (5) that branches off from the main cold air supply path (2) and connects to the room (1) supplies cold air to the room (1)!
A cold air side damper (6) is provided as a cold air volume adjusting means for adjusting the QC (QC). Similarly, a branch hot air supply path ( 7) is provided with a hot air side damper (8) as a hot air volume adjusting means for adjusting the hot air supply i (QW) to the room (1).

Further, the branch exhaust passage (9) connecting the chamber (1) and the main exhaust passage (4) is equipped with a constant air flow device (10) that automatically maintains the exhaust volume from the chamber (1) at a set amount. It is a provision.

The room (1) is provided with a room temperature sensor (11) that detects the room temperature, a room pressure sensor (100) that detects the room pressure (specifically, a differential pressure sensor that detects the differential pressure between the indoor and outdoor), and ,
Feedback room temperature control that adjusts and maintains the detected room temperature at the set temperature by automatically operating the cold air side damper (6) and the hot air side damper (8) based on the detection information of these sensors (11) and (12). Controllers (13) are disposed at appropriate locations to centrally carry out feedback chamber pressure control that adjusts and maintains the detected chamber pressure at the set pressure by adjusting the supply/discharge balance.

The controller (13) has the following functions (a), (b), and (c): (a) Based on the deviation (ΔP) between the detection chamber pressure and the set pressure,
(see Figure 2), total amount (QT) of cold air supply ff1 (lJc) and warm air supply amount (OW) (in this case, room (1)
(b) Based on the deviation (Δt) between the detected room temperature and the set temperature (see Figure 3), determines the amount of cold air supplied (OC) and the amount of hot air supplied. Supply amount (O
W) An air volume ratio determination function that determines the ratio (α:l-α (0≦α≦1)), (C) The determination result (QT) ( Based on α: 1-α) (see Figure 2), the amount of cold air supplied (QC) is calculated using the following formula (i) QC = α・QT
The cold air side damper (6) is automatically operated so that the value satisfies (1), and the warm air side damper (6) is automatically operated so that the hot air supply amount (QW) is a value that satisfies the following formula (% formula %). (8) It is equipped with an operation execution function that automatically operates.

In other words, cold air supply amount (QC) and hot air supply i (QW)
Adjust the room temperature by adjusting the ratio and supply cold air! (
The room pressure is adjusted by adjusting the total amount of QC) and hot air supply (QW), and the cold air side damper (6) and hot air side damper (8) are automatically operated to control room temperature and room temperature. This is to ensure that pressure control is carried out in an integrated manner.

[Another example]

Next, another example will be listed.

(a) Cold air volume adjustment means (6) and warm air volume adjustment means (8)
Various types and structures can be applied to each of them.

(b) Control means (controller) A method in which (13) is equipped with the functions (a), (0), and (c) described in the above embodiments to execute control (i.e., ratio adjustment and Adopting a method that simultaneously performs total amount adjustment) has the advantage of extremely high responsiveness and stability of room temperature control and room pressure control, but the specific control execution method can be changed in various ways. For example, in order to adjust the detected room temperature to the set temperature, only one of the cold air volume adjustment means (6) and the hot air volume adjustment means (8) is operated to adjust the cold air supply volume (QC) and the hot air supply volume. (QW) and operate both the cold air volume adjustment means (6) and the hot air volume adjustment means (8) by the same amount in order to adjust the detection chamber pressure to the set pressure. (QC)
The amount of cold air supplied (QC) and the amount of warm air supplied (Q
W) may be converged to their respective optimum values.

(C) The control means (13) includes a sequence circuit, a microcomputer, etc.
Various types can be applied.

(d) The cold air whose supply amount is adjusted by the cold air amount adjustment means (6) and the warm air whose supply amount is adjusted by the hot air amount adjustment means (8) may be separately supplied to the target room (1), Alternatively, the mixture may be supplied to the target chamber 1).

Note that although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structures and methods shown in the accompanying drawings.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention, in which FIG. 1 is a diagram of the configuration of the device, and FIGS. 2 and 3 are graphs for explaining the air volume determination mode. FIG. 4 is a diagram showing a conventional example. (1)...Target room, (2), (5)...
・Cold air supply path, (3), (7)...Hot air supply path, (6)...Cold air volume adjustment means, (8)...
... Warm air volume adjustment means, (11) ... Room temperature sensor, (12) ... Room pressure sensor, (13) ...
...control means.

Claims (1)

[Claims] 1. As a room temperature adjustment means, a cold air amount adjustment means (6) for adjusting the amount of cold air supplied (Q_C) from the cold air supply paths (2) and (5) to the target room (1); A double duct type air conditioner comprising a hot air volume adjusting means (8) for adjusting the hot air supply volume (Q_W) from the wind supply paths (3) and (7) to the target room (1), Cold air supply amount (Q_C) and hot air supply amount (O_W
) to maintain the room temperature detected by the room temperature sensor (11) at the set temperature, and adjust the total amount of cold air supply amount (Q_C) and warm air supply amount (Q_W) to maintain the room temperature detected by the room pressure sensor (11) at the set temperature. A double duct type air conditioner provided with a control means (13) for automatically operating the cold air volume adjustment means (6) and the warm air volume adjustment means (8) so as to maintain the detected room pressure at the set pressure. 2. The control means (13) performs the following functions (a), (b), and (c), that is, (a) controls the amount of cold air supplied (Q_C) based on the deviation (ΔP) between the detected chamber pressure and the set pressure. (b) A supply air amount determination function that determines the total amount (Q_T) of the detected room temperature and the set temperature (Δt)
_C) and the hot air supply amount (Q_W) (α: 1-α(0
≦α≦1)), (c) cool air supply based on the determination result (Q_T), (α:1−α) by the above-mentioned supply air volume determination function and air volume ratio determination function. The cold air amount adjusting means (6) is automatically operated so that the amount (Q_C) satisfies the following formula (i) Q_C=α・Q_T (i), and the hot air supply amount (Q_W )
Claims include an operation execution function for automatically operating the hot air volume adjusting means (8) so that the value satisfies the following formula (ii): Q_W=(1-α)・Q_T (ii) The double duct type air conditioner according to item 1.