JPH04187924A - Air conditioner - Google Patents

Abstract

PURPOSE:To make it possible to shorten adjustment time required for setting static pressure during trial operation by adding a trial operation switch which full opens a variable air capacity unit regardless of a variable air capacity unit controller in addition to a prior art switch. CONSTITUTION:When operation is changed over in trial operation mode by means of a trial operation switch 26, variable air capacity units 18, 19 and 20 forcibly drive internal motors 18b, 19b, and 20b installed inside the variable air capacity units 18, 19, and 20 regardless of variable air capacity unit controllers 21, 22, and 23 and full open the degree of opening of dampers so that the variable air capacity units 18, 19, and 20 may pass the maximum air capacity respectively. At that time, a static pressure detector 25 is adapted to detect a static pressure P1 outside equipment. When a fan controller 2a is used to set the pressure P1 outside the equipment to a preset value by a static pressure setting point station setter 25a, the rotary sped of an indoor fan 2 will be controlled. During the setting operation, the variable air capacity units 18, 19, and 20 are in a position to pass the maximum air capacity. Therefore, the preset static pressure for the static pressure setting pint station setter 25a is adapted to be the static pressure outside the equipment at that time.

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to the control of the blower of a duct-type air conditioner that has an air volume adjustment unit in the tact which controls the room temperature by controlling the air volume of each air conditioned room. It is.

BACKGROUND OF THE INVENTION Recently, individual air conditioning systems have been increasingly used in air conditioners used in buildings and the like due to their energy saving properties. Against this background, duct-type air conditioners are often used that use a variable air volume unit that adjusts the air volume supplied to each air-conditioned room and fully controls the room temperature.

See the drawing below! For reference, a conventional example will be explained.

FIG. 4 is a schematic configuration diagram showing an example of a conventional air conditioner. 1 is the indoor unit body, and there is an indoor fan with variable rotation speed inside. Rotation speed of indoor fan 2? It is equipped with a blower controller 2a for controlling, an indoor heat exchanger 3, and an indoor electric expansion valve 4 for expanding refrigerant. 5 is the outdoor unit body, and there is a compressor 6 inside. Outdoor heat exchanger7. It is equipped with an outdoor side blower 8, an outdoor side expansion valve 9, and a compressor 6. Outdoor heat exchanger7. Outdoor electric expansion valve9. Indoor heat exchanger 3. The indoor electric expansion valve 4 constitutes a well-known refrigeration circuit.

A main duct 11 is provided from the indoor blower 2 to a branch chamber 10, and from the branch chamber 10 to each air-conditioned room 12, 13. j4'? Branch duct at 15.16.17
are arranged respectively. Branch duct) 15, 16.17
There are variable air volume units 18, 19 and 20 respectively in the middle of the
is installed. Variable air volume unit 18, 19.2
0 has dampers 18a, 19a, 20 inside, respectively.
a, motors 18b, 19b, 20b that drive the dampers 18a, 19a, 20a, and motors 18b, 19b.

Air volume controllers 18c, 19c, 20c that control 20b
Equipped with: Moreover, inside the air-conditioned rooms 12, 13, 14, there are indoor temperature setting devices 21a, 22a.

A variable air volume unit controller 21.degree. 22.23 is provided which also has indoor temperature detectors 21b, 22b, and 23b. Further, a static pressure detector 25 for detecting the static pressure in the duct in the branch chamber 10 and a static pressure setting device 26a are provided.

Next, the operation of the air conditioner configured as above will be explained.

Hot air or cold air blown out from the indoor unit main body 1 passes through the main duct 11, is branched in the branch chamber 10, and then flows through the branch ducts 1 to each of the target rooms 12, 13, and 14.
5, 16.17. Also branch duct) 15, 16
．． A variable air volume unit 18 provided in the middle of 17,
19.20 is variable air volume unit controller 21.22
．． Indoor temperature setting device 21a, 22a, 23 in 23
The temperature set in step a and the indoor temperature detectors 21b and 22
b, air volume controller 18c based on the difference between the temperature detected at 23b.

Motors 18b, 19b, 20b via 1gc, 20c
The dampers 18a, 19a+, and 20a are driven to change the opening degrees of the dampers 18a, 19a+, and 20a, thereby changing the amount of passing air.

When the air volume changes at variable air volume unit) 18, 19' and 20, the external static pressure inside the branch chamber 10 changes, and the static pressure detector 25 detects the change, and the blower controller 2a stabilizes the external static pressure. When trying to set the value using the pressure setting device 25a,
The rotation speed of the indoor blower 2 is controlled. Here, the set value by the static pressure setting device 25a is determined by each variable air volume unit 1-18.1.
9. Set so that 20 is the static pressure value when the maximum air volume is flowing.

Problem to be Solved by the Invention The static pressure is set using the static pressure setting device based on the total of the pressure loss, etc. at the outlet, that is, the external static pressure at the maximum air volume. The problem was that it often did not work, and it took a lot of time to make adjustments.

In view of the above-mentioned problems, the present invention provides an air conditioner that can significantly shorten the time required to adjust external static pressure during a test run by providing a test run switch that fully opens the variable air volume unit regardless of the variable air volume unit controller. It is something to do.

Means for Solving the Problems Therefore, the air conditioner of the present invention includes, in addition to the conventional air conditioner, a trial run switch that fully opens the variable air volume unit regardless of the variable air volume unit controller.

Function With the above configuration, by operating the test run switch during a trial run, the variable air volume unit will be fully opened regardless of the variable air volume unit controller, and the variable air volume unit will be in a state where the maximum air volume is flowing, so the static pressure at this time will be By setting the static pressure at the time of operation, it is possible to shorten the adjustment time required for setting the static pressure at the time of trial operation.

Embodiment FIG. 1 is a schematic structural diagram showing an embodiment of the present invention, which will be described below with reference to the drawings. Components having the same configuration as the conventional example are given the same numbers, and detailed explanations are omitted.

In one embodiment of the present invention, compared to the conventional case, a test run switch 26 for forcibly performing a test run is provided.

Next, its operation will be explained with reference to FIGS. 2 and 3.

After turning on the power to the indoor unit main body 1, when switching to the trial run mode with the trial run switch 26 (branching step 1 to the YES side), the variable air volume unit 18° 19.20 is related to the variable air volume unit controller 21° 22.23. Without,
Motors 18b, 19b inside the 20, 18, 19.

20b and dampers 18a, 19a, 20
The opening degree of a is fully opened (step 2), and the variable air volume (22), 19, and 20 are brought into a state where the maximum air volume is flowing, respectively (step 3). At this time, the static pressure detector 26 detects the external static pressure P1, and the blower controller 2a sets the external static pressure P1 to the set value P by the static pressure setting device 25a. In order to achieve this, the rotational speed of the indoor fan 2 is controlled (steps 4 to 9).

At this time, the variable air volume units 18, 19, and 2o are in a state where they each flow the maximum air volume, so the static pressure setting value is 25.
Set the set static pressure of a to the external static pressure at this time.

Effects of the Invention With the above configuration, the external static pressure in the air conditioning system did not match the design, and it took a lot of time to check the air volume and external static pressure and adjust the static pressure settings during the trial run. By operating the switch, the variable air volume unit is fully opened regardless of the variable air volume unit controller, and the variable air volume unit is in a state where it can flow the maximum air volume, so the static pressure at this time is used as the static pressure setting for heating and cooling. This makes it possible to shorten the adjustment time required to set the static pressure during trial operation.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an air conditioner according to an embodiment of the present invention, FIG. 2 is a control block diagram of the air conditioner according to the same embodiment,
FIG. 3 is a control flowchart of the air conditioner of the same embodiment,
FIG. 4 is a schematic diagram of a conventional air conditioner. 1... Indoor unit main body, 2... Indoor blower, 2a... Blower controller, 11.15, 16
, 17... Duct, 1B, 19.20...
...Variable air volume unit 21.22.23...Variable air volume unit controller, 26...Static pressure detector, 25a...Static pressure setting device, 26...・
・Test run switch. Name of agent: Patent attorney Akira Okaji Haga 2 people 2-! I
j') Iniri i) ζM 2 Yu 1--Doashi Wan Kihichi/8, 19, 2θ-'T Mugi Uni 7)-25-Ying Pressure Phlegm Ji-Hsiu Road 3 Figure 7-----]

Claims (1)

[Claims] A duct type indoor unit main body having a rotation speed controlled indoor blower, a duct that guides cold air or hot air from the indoor unit main body to an air-conditioned room, and an air volume in the middle of the duct that is variable depending on the room temperature of the air-conditioned room. a variable air volume unit, a variable air volume unit controller that activates and stops the variable air volume unit and sets the room temperature, a static pressure detector that detects static pressure in the duct, and a blower controller that controls the indoor fan; Equipped with a static pressure setting device for setting external static pressure and a trial run switch, when the trial run switch is ON, the variable air volume unit is fully opened regardless of the variable air volume unit controller, and when the trial run switch is OFF, the variable air volume unit is fully open. An air conditioner characterized by following an air volume unit controller.