JP2759672B2 - Air conditioning method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention air-conditions an air-conditioned area by a mixture of cooling and heating air, and keeps the indoor pressure in the air-conditioned area constant even if the exhaust volume fluctuates. The present invention relates to an air conditioning method capable of adjusting the temperature while maintaining the temperature.

(Prior art and its problems) Conventionally, as an air conditioning method adopted in a building having a plurality of air-conditioned areas, cooling air or heating air blown through one air supply duct is conditioned air. The air conditioning method using a variable air flow single duct system in which the air supply is supplied to each air-conditioned area, and the supply amount, that is, the blow-off air flow in each air-conditioned area is varied to maintain each air-conditioned area at an appropriate temperature. Cooling air and heating air respectively blown through the air duct are mixed in each air-conditioned area, and the mixing ratio is varied so that conditioned air at an appropriate temperature and a constant air volume is supplied to each air-conditioned area. There is an air conditioning method using a constant airflow dual duct system.

However, in the former case, even if the exhaust air amount fluctuates due to forced ventilation or the like, the supply amount of the conditioned air can be changed correspondingly, so that the indoor pressure is kept constant regardless of the exhaust air amount fluctuation. On the other hand, it has a disadvantage that the response to the room temperature change is slow, and it is impossible to control the room temperature particularly when the displacement is fluctuated. Since the temperature can be changed, there is an advantage that the room temperature can be quickly controlled.On the other hand, since the supply amount of the conditioned air is constant, it cannot cope with the fluctuation of the exhaust amount, and the room pressure is controlled. Had the disadvantage that it could not.

Also, some dual duct systems employ a variable air volume control system, but these are also mainly for temperature control and not for pressure control.

(Objects of the Invention) The present invention has been made in order to solve the above-mentioned problems of the prior art.
It is an object of the present invention to provide a new air conditioning method that has a variable air volume function and can simultaneously control not only the room temperature but also the room pressure in the latter air conditioning system using a dual duct system. .

(Constitution of the Invention) The air conditioning method according to the present invention is obtained by mixing the cooling air and the heating air respectively supplied from the terminal cooling and hot air supply ducts in the dual duct system, and changing the mixing ratio. Is supplied to the air-conditioned area as conditioned air, and when the exhaust volume of the air-conditioned area fluctuates, the supply amount of the mixed air is varied in accordance with the fluctuation amount to change the air-conditioned area. It is characterized in that the room pressure is kept constant.

(Example) An example showing a specific configuration diagram of an apparatus for performing the air conditioning method according to the present invention will be described.

That is, 1, respectively damper 2 ₁ and Wind sensor 2 ₂ Deyuarutaipu air volume regulator provided for each be air-conditioned area in which two sets of air volume regulator 2,2 complexed with a single machine or two planes The cooling air and the heating air sent from the air conditioner (not shown) via the air supply ducts SD ₁ and SD ₂ respectively pass through the respective air volume regulators 2 and 2 and are mixed in the chamber ₁₁ . The mixed air is blown out as conditioned air from outlets B... B of the air-conditioned area A. Each air volume regulator 2
The, the damper 2 ₁ to adjust the quantity of air passing through, the wind speed sensor 2 ₂ whose voltage changes provided in accordance with the amount of wind passing,
該風speed sensors 2 the difference between the output signal and its voltage is compared with the mixed command signal described later from ₂ is zero and so as to damper 2 ₁
Is controlled so that the amount of air passing therethrough by the operating device 3 drives the predetermined value. 4 is a pressure regulator which converts the pressure measured by the pressure sensor 4 ₁ accessory senses an electrical signal, and outputs a pressure control signal that can assume any set value, the pressure control signal to be conditioned zone clogging Since this signal is proportional to the difference between the indoor pressure and the outdoor pressure, this signal is used as a total air volume setting signal. This total air volume setting signal is a signal for determining the air volume of the conditioned air (mixed air) blown out from the outlets B.
The signals are distributed by a mixing ratio setting signal described later, and are input to the controllers 3 and 3 of the air volume regulators 2 and 2 as respective mixing command signals. 5 sets how many times the temperature of the air conditioning area, i.e. the room, the difference between the actual indoor temperature sensed by the temperature sensor 5 _first comes into an electric signal, for example, towards the sensed temperature When the temperature is higher than 1 ° C., the operation command is input to the operation device 3 as a mixing command signal so that 100% of the mixed air volume ratio becomes the cooling air. A temperature setting device that outputs a mixing ratio setting signal for distributing the voltage of the total air volume setting signal so that the operating devices 3 and 3 are input as a mixing command signal so that the mixing ratio between cooling air and heating air is sensed. It is determined by the difference between the temperature and the set temperature. 6 is a flow rate regulator for controlling the exhaust amount of the air-conditioning area, are to allow a predetermined amount of exhaust by opening and closing of the damper ₆₁ when the forced discharge by the blower 7.

(Operation of the Invention) An embodiment illustrating the operation of the air conditioning method according to the present invention will be described.

(At the time of summer air-conditioning operation) At the start of operation, cooling air with the temperature determined in consideration of the maximum and minimum heat loads is supplied from the air supply ducts SD ₁ and SD _2, and the indoor air-conditioned area at that time Since the pressure is atmospheric pressure, the voltage of the maximum differential pressure signal aV is output from the pressure regulator 4 as a total air volume setting signal for pressure control due to the difference between the set pressure and the indoor pressure (atmospheric pressure). aV when the sensor 5 ₁ temperature sensed at the 1 ℃ or higher than the set temperature
Since the input as a mixed instruction signal 100% of the total air volume setting signal to air volume regulator 2 of the operation unit 3 of the cooling air side, air cooling from the air supply duct SD ₁ damper 2 ₁ is driven by the operator 3 the control as compared to the air velocity sensor 2 ₁ of the output signal to pass 100%. At this time, the damper because mixing command signal to the air volume regulator 2 of the operation unit 3 of the heating air side is zero, so that the output signal of the wind speed sensor 2 ₂ becomes zero
2 ₁ is fully closed.

Therefore, only the cooling air is blown out 100% from the air outlets B... B of the air-conditioned area, and the air-conditioned area is rapidly cooled. For example, when the set pressure is set 2.5 mm Aq higher than the atmospheric pressure. Assuming that the pressure difference is maintained at 5% between the supply and the exhaust amount, when the exhaust amount is 95%, the room pressure is maintained at the set pressure, and the blowout air amount does not change.

When the temperature of the air-conditioned area falls due to the blowing of the cooling air, and the difference between the sensed temperature and the set temperature becomes 1 ° C. or less, a mixing ratio setting signal is output from the temperature setter 5 and is shown in FIG. Since the voltage aV of the total air volume setting signal is distributed as a mixing command signal to the respective operating devices 3 and 3 on the cooling air side and the heating air side in a preset ratio such that the cooling air side, open as damper 2 ₁ airflow regulator 2,2 heating air side, 2 ₁ becomes a predetermined air volume, closed, heating air and cooling air at that ratio passes through the respective air volume regulator 2,2, are mixed at room 1 ₁ is blown as conditioned air from the air outlet B ... B. For example, set the temperature to 23 ° C
At the same time, when the air conditioning operation is performed with the cooling air temperature and the heating air temperature set at 10 ° C. and 36 ° C., respectively, and when the difference between the sensed temperature and the set temperature becomes 0.5 ° C., the cooling from the graph of FIG. Since the ratios of the mixing command signals to the air-side and heating air-side controllers 3 and 3 are 75% and 25%, respectively, the cooling air-side and heating air-side controllers 3 and 3 have 0.75 aV and 0.
A voltage of 25 aV is input, and the operating devices 3, 3
Is driven, and the air volume regulator 2 on the cooling air side cools the cooling air by 75%.
%, The air flow controller 2 on the heating air side passes 25% of the heating air, and the conditioned air with a total air flow of 100% and a temperature of 16.5 ° C is blown out of the outlet B ...
It is blown out from B. At this time, the mixing ratio of the cooling air and the heating air, that is, the mixing amount changes, but the total air amount of the mixing air does not change, so that no pressure fluctuation occurs.

By the operation described above, the mixing ratio, that is, the temperature of the conditioned air is determined from the difference between the sensed temperature and the set temperature, and air conditioning is performed according to the generated heat load in the air-conditioned area.

Thereafter, the above operation is repeated every time the temperature of the air-conditioned area changes, and the air-conditioned area is stored at an appropriate temperature (set temperature).

And Thus, a need to reduce the emissions in the air conditioning operation occurs, the reduction in damper ₆₁ of the opening degree of the exhaust side air volume regulator 6, a pressure, that chamber of the air-conditioning zone have併the reduction of emissions since pressure rises instantaneously, the voltage corresponding to the sensed Shinnai pressure and the set pressure from the pressure regulator 4 to a pressure sensor 4 ₁ is outputted as the total air volume setting signal. That is, the voltage of the total air volume setting signal decreases in accordance with the amount of reduction of the exhaust air volume. For example, when the exhaust air volume decreases by 50% to 45%, the voltage of the total air volume setting signal at the time of equilibrium becomes 0.5 aV. Even if the displacement decreases, the mixing ratio at that time is the same, and the temperature of the conditioned air does not change. Therefore, the ratio of the mixing ratio setting signal does not change and the voltage of the total air volume setting signal (0.5 aV) allocate, lower in accordance with the voltage of the mixing command signal to each of the ratios, the damper 2 ₁ cooling air side, the heating air side air volume regulator 2 ₁
Of the conditioned air (total air flow) is reduced to 50% by adjusting the opening degree of each to a predetermined air volume, but this reduction amount is almost equal to the reduction amount of the exhaust air volume. Return to pressure. Even if the indoor pressure returns to the set pressure, the pressure voltage of the total air volume setting signal is held until the next pressure fluctuation, so that air conditioning is performed with the blow air volume corresponding to the exhaust air volume. is there.

When the amount of exhaust increases, the amount of air blown out of the conditioned air increases accordingly, and air conditioning is performed with the amount of air blown out corresponding to the amount of exhaust.

Thereafter, the above operation is repeated every time the displacement of the air-conditioned area changes, and the indoor pressure in the air-conditioned area is maintained at the set pressure.

Even during the air conditioning operation in winter, the temperature control and pressure control functions are exactly the same.

(Effects of the Invention) As described above, according to the air conditioning method of the present invention, the cooling air and the heating air are mixed, and the mixed air having a desired temperature obtained by changing the mixing ratio is converted to the conditioned air. Since the conditioned air is air-conditioned by the conditioned air, it is possible to adjust the temperature without changing the supply amount of the conditioned air when the displacement is constant, that is, without causing pressure fluctuation. It is possible to maintain the supply amount of conditioned air at an arbitrary set value without changing the mixing ratio of cooling and heating air with respect to fluctuations in the displacement and static pressure at the inlet of the air conditioner duct. Therefore, even if forced ventilation is performed to discharge toxic gas, the conventional air-conditioning method can maintain the indoor pressure in the area to be air-conditioned at a constant level and control the temperature during forced ventilation. It is possible to achieve excellent effects that could not be achieved, and it can minimize pressure fluctuations and temperature fluctuations in the area to be air-conditioned, so a clean room equipped with precision equipment sensitive to pressure and temperature, and forced ventilation are required It is the most suitable as an air conditioning method in a chemical laboratory or the like.

[Brief description of the drawings]

The drawings illustrate an embodiment of the present invention. FIG. 1 is an explanatory view of an apparatus for implementing the method of the present invention. FIG. 2 is a temperature difference between a sensed temperature and a set temperature when the supply amount of conditioned air is 100%. FIG. 3 is a graph showing the relationship of the mixing command signal to the operation device with respect to the pressure, and FIG. 1 ... air volume controller, 1 ₁ ... mixing chamber, 2 ... air volume controller,
2 ₁ …… Damper, 2 ₂ …… Wind speed sensor, 3 …… Operation device, 4
… Pressure regulator, 4 ₁ … Pressure sensor, 5… Temperature setter, 5 ₁ … Temperature sensor, 6… Air volume regulator, 6 ₁ … Damper, A… Air-conditioned area, B… blow-out port, SD _1, SD ₂ ...... air supply duct

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Sadao Matsumoto 4-6-2 Koraibashi, Chuo-ku, Osaka-shi, Osaka Inside Nikken Sekkei (72) Inventor Eiichi Wada 1-chome, Minamimori-cho, Kita-ku, Osaka, Osaka 4-5 Shinko Kogyo Co., Ltd. (72) Michichi Okubo 1-4-5 Minamimorimachi, Kita-ku, Osaka-shi, Osaka Prefecture Shinko Kogyo Co., Ltd. (72) Kenji Kashiwara Kita, Osaka-shi Kita 1-5-5 Minamimori-cho, Ward Shinko Kogyo Co., Ltd. (56) References JP-A-1-123933 (JP, A) JP-A-62-202955 (JP, A) JP-A-54-62640 (JP) , A) JP-A-56-105228 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24F 11/04

Claims (1)

(57) [Claims] (1) terminal cooling in a dual duct system;
Cooling air and heating air respectively supplied from the hot air supply duct are mixed, and mixed air at a desired temperature obtained by changing the mixing ratio is supplied as conditioned air to the air-conditioned area. An air conditioning method characterized in that when the amount of exhaust air in the air-conditioned area fluctuates, the supply amount of the mixed air is varied in accordance with the amount of the fluctuation to keep the indoor pressure in the air-conditioned area constant.