JPS6237628A - Air-conditioning machine - Google Patents

Abstract

PURPOSE:To contrive the operation of energy saving by a method wherein dampers of a plurality of specified rooms are opened when atmospheric temperature is comparatively high and weather is fine to effect ventilating operation while stopping a heat source machine until temperature differences between the specified rooms become small. CONSTITUTION:The air-conditioning machine is provided with the heat source machine 17 such as a heat pump or the like, connected to the heat exchanger of an air handling unit 2, a fan 5, transferring cold or warm air generated by the heat source machine 17 and the heat exchanger 4, a main duct 6, connected to the fan 5, an airflow volume regulating damper 9, arranged in the branch duct 7 of the main duct 6, and room thermostats 14, provided in respective rooms 1. The heat loads of respective rooms 1 are measured by a heat load measuring means 18, inputting the detecting temperature signals of these room thermostats 14, and the dampers 9 of a plurality of specified rooms 1 are opened by a damper control means 19, then, a ventilation control means 20 controls the operation of the fan 5 so as to generate weak airflow while stopping the heat source machine 17 until room temperature differences between the specified rooms 1 become small.

Description

[Detailed Description of the Invention] [Industrial Applications] The invention of B relates to a duct type air conditioner that employs a variable air volume control system that can independently adjust the room temperature of each room.

[Conventional technology]

The Centrane air conditioning system, which uses air ducts to distribute temperature-controlled air to each room for air conditioning, can easily incorporate a humidifier and high-performance filter, and can also be used for outside air processing and total heat exchange. The heat pump chiller/fan coil method allows for high-quality air conditioning, and the room to be air-conditioned has only an air outlet and an inlet, which makes the indoor space more efficient, and there are fewer problems with the heat transfer system. This system has many advantages compared to other systems such as the air conditioner system and the distributed distribution system of packaged air conditioners, and for this reason, it is often used for air conditioning in buildings. Among these, the variable air volume control method (hereinafter referred to as VAV method), which allows for energy-saving operation, can independently control the temperature of each room with a different heat load, can also stop air conditioning in rooms that are not in use, and can provide the required amount of airflow. Operating costs can be reduced by varying the power of the blower depending on the air volume, and the capacity of the heat source equipment can be designed to be smaller by considering the simultaneous usage rate.

For the above VAV system, there are 2
There are two methods. One is a method using a bypass type VAV unit, which adjusts the ratio of the amount of air blown into the room and the amount of air directly returned to the heat source equipment (bypassed) depending on the indoor load. This method is often used in systems using packaged air conditioners, where it is difficult to control the capacity of the heat source equipment because the amount of air blown is constant, but there is no energy saving effect by controlling the blower.

Another method uses an aperture-type VAV unit. This method detects the pressure inside the duct, which changes according to the opening degree of the damper, and controls the capacity of the blower so that the value of B becomes the set value. (At this time, the air temperature in the duct is controlled to be constant), the required capacity of the heat source equipment is reduced, and at the same time, the power of the blower is also reduced.

A blower associated with damper control in the VAV system.

The conventional technology related to the capacity control method of heat source equipment is
-14979, Special Publication No. 55-22696, Special Publication No. 55
There are No. 5-24022 and Japanese Patent Publication No. 55-44853. FIG. 3 is a system configuration diagram of these conventional air conditioners. In the figure, 1 is an air-conditioned room;
Here, a case of three rooms is shown. 2 is an air handling unit placed in the ceiling of room 1, and air filter 3. Heat exchanger4. It is composed of a blower 5. 6 is the main duct connected to the air outlet of this air handling unit 2, 7 is the main duct 6 of the cigarette.
3 branch ducts branched out according to the number of rooms, 8 is a squeeze-shaped VAV unit inserted in the middle of this branch duct,
9 is a damper rotatably installed in this VAV unit) 8, 10 is an air outlet installed at the end of the above-mentioned duct 7, 11 is an inlet provided at the bottom of the door of the above-mentioned room 1, and 12 is a Ceiling inlet installed on the ceiling of the hallway, 13
14 is a suction duct that connects this ceiling suction port 12 with the suction port of the air handling unit 2, and 14 is a room thermostat installed in each room 1. 115 is a temperature detection device installed in the main duct 6. vessel, 16
17 is a pressure detector also installed in the main duct 6, and 17 is the heat exchanger fi! , Wj4 is a heat source device such as a heat pump.

In the conventional air conditioner configured as described above, the opening degree of the damper 9 is adjusted to an arbitrary position depending on the temperature difference between the set temperature set by the user on each room thermostat 14 and the detected current air temperature. Adjust. Then, the pressure inside the main duct 6 changes according to the opening degree of the damper 9, and the pressure detector 16 detects this, and the air blower 8
Change the capacitance of 15. In addition, since the outlet air temperature of the heat exchanger 4 changes as the air flow rate changes, this temperature is detected by the temperature detector 15 and the capacity of the heat source device 17 is controlled so that the air temperature reaches a preset value. do.

The air, which has been adjusted to a substantially constant temperature in this manner, is blown out from the Suita outlet 10 into the room 1 at an air volume that corresponds to the magnitude of the indoor heat load. The air that has been conditioned in the room 1 flows from a suction port 11 through a space such as a hallway to a ceiling suction port 12, and returns to the air handling unit 2 via a suction duct 13.

Although FIG. 3 shows a method in which the return air is returned to a corridor or the like, there is also a method in which a return duct is provided from each room 1 to the air handling unit 2 to further improve controllability and energy saving. Further, in FIG. 3, the branch duct 7 is branched from the main duct 6, but there is also a method in which the main duct 6 is not provided and the branch duct 7 is arranged in an octopus-like shape from the air handling unit 2. In addition to the ceiling-embedded type shown in FIG. 3, the air handling unit 2 includes floor-standing types, ceiling types, and even a type that incorporates a gas furnace.

[Problem that the invention seeks to solve]

In air conditioners using conventional VAV units such as those mentioned above, even when the outside temperature is relatively high and the heat load is small, such as at the beginning of the heating season or early spring, if the room temperature is lower than the set value, the air conditioner The air conditioner was operated only in the rooms where it was needed. In such a case, the heat source 8117 is
When a top pump is used, the heat load on the top pump is small, so the 0N10FF of the top pump increases and the operating efficiency decreases. Also, at times like this, if the weather is clear and the room on the south side gets a lot of sunlight, the temperature in that room will be high.
As a result, the rooms on the south side had to open the windows slightly to lower the room temperature, while the rooms on the north side had to be heated, something that went against energy conservation.

This invention solves the above-mentioned conventional problems.When the outside temperature is relatively high and the sky is clear, the dampers in designated rooms are opened and the heat source is turned off until the temperature difference between these rooms becomes small. The purpose of the present invention is to obtain an air conditioner capable of energy-saving operation by performing air blowing operation while the machine is stopped.

[Means for solving problems]

The air conditioner according to the present invention has a heat load measurement method that measures heat load based on the output signal of a room thermostat for each room that detects the temperature of each room to which cold and hot air from a heat source device is distributed through a duct. a damper control means that controls the dampers of a plurality of designated rooms to open, and a heat #! The blower control means controls the operation of the blower with a weak wind while the blower remains in the EL state.

[For production]

In this invention, the damper control means operates to open the damper in a designated room and leave the dampers in other rooms idle, and the blower control means operates to open the damper in a designated room and leave the damper in other rooms idle, and the blower control means operates to open the damper in a designated room and to leave the damper in other rooms idle. By controlling the blower to operate at low wind speed until the temperature difference becomes small, this enables energy-saving operation of the air conditioner.

〔Example〕

FIG. 1 is an overall principle block diagram showing an embodiment of an air conditioner according to the present invention. As is clear from FIG. 1, a heat source 8117 such as a heat pump connected to the heat exchanger of the air handling unit 2, this heat source device 17, and a heat exchanger 8117 are connected to the heat exchanger of the air handling unit 2. f! Air blower that conveys cold and hot air generated by 4 [
5, a main duct I-6 connected to this blower 5, a damper 9 for adjusting air volume arranged in a branch duct 7 of this main duct 6, and a room thermostat 14 attached to each room 1. Roots Na° Mosques I-
The heat load measuring means 18 which inputs the detected temperature signal of 14 measures the heat load of each room 1, and the dampers 9 of the specified plurality of rooms 1 are opened by the gunpa control means 19, and the heat load measuring means The blower control means 19 controls the heat source 811 until the difference in the room temperature between the designated rooms 1 measured in step 18 becomes small.
The air blower 5 is controlled to operate with a weak wind while the air blower 7 remains stopped. In FIG. 1, the same reference numerals as in FIG. 3 indicate the same or corresponding parts.

Next, the operation of the above embodiment during heating will be described with reference to the flowchart shown in FIG.

First, the user selects and inputs the normal operation mode or the blower operation mode using an operation panel (not shown) connected to the heat source 8117 (step 21).

Note that in this case, the ventilation operation mode is selected.

Next, the user specifies and inputs which rooms should be air-conditioned using the operation panel or the room thermostat 14 (step 22). In the next step 23, the current room temperature T of each room detected by the room thermostat 17 of the room 1 designated in step 22 is input. Further, in the next step 24, the damper 9 of the designated room 1 is controlled to be fully opened, and the dampers 9 of the other rooms are controlled to be fully opened (only the room to be air conditioned is opened).

In step 25, the operation of the heat source device 17 is controlled to be stopped. In step 26, it is determined whether the difference between the maximum value Tmhχ and the minimum value Twin of the room temperature measured in step 23 is larger or smaller than a set value A (for example, 3°C), and if it is larger, the process proceeds to step 27 and the blower 5 is operated. Control. At this time, it is desirable to operate the blower 5 at as low an air volume as possible in order to eliminate discomfort caused by blowing out cold air. Further, if it is determined in step 26 that the temperature difference is smaller than the set value A, the blower 5 is stopped (step 28). The above control is repeated at regular time intervals. For example, when heat is transferred from two rooms on the south side to two rooms on the north side, the warm return air from the south side room is returned to the fan 5 and is blown out to the north side room, so the temperature difference between each room gradually decreases. Become. In other words, the room temperature on the south side decreases, the room temperature on the north side increases, and the ventilation operation continues until the highest and lowest values of the room temperatures in each room are reduced to the set value.

The ventilation operation mode during the heating season has been explained above, and although the effect is not as noticeable during cooling operation or during heating, it is possible to blow cold air from the north to the room on the south.

In the above embodiment, operation/stopping of the air blower 445 was determined only based on the altitude difference in room temperature, but the air blower 5 is also stopped when the temperature difference and the room temperature in the north room reach a certain set value. Good too.

Furthermore, although the above embodiment describes the case where no return duct is provided, if a return duct is used, the room temperature in the room on the north side can be raised without the return air heating the hallway etc. unnecessarily.

Further, in the above embodiment, the control flow is in the order shown in FIG. 2, but the order from the air conditioning room input in step 22 to the heat source device control output in step 25 does not necessarily have to be this way.

Furthermore, this invention can be used in air-conditioning and heating systems that use a heat pump as a heat source or other heat sources, and in heating systems that use a furnace as a #II source.

〔Effect of the invention〕

As described above, according to this invention, during the heating season, when the outside temperature is relatively high and the sky is clear, the dampers of specified multiple rooms are opened, and the air blower is operated while the heat source equipment is stopped until the temperature difference in the rooms is reduced. Since it is configured to do this, it is possible to reduce the temperature difference between specified rooms located north and south with less energy consumption.

[Brief explanation of drawings]

Fig. 1 is an overall principle configuration diagram showing an embodiment of the air conditioner of the present invention, Fig. 2 is a flowchart for explaining the operation of Fig. 1, and Fig. 3 is a diagram of the conventional air conditioner. It is a system configuration diagram. 1. Room, 2. Air handling unit, 5.
- Blower, 6 - Duct, 9 - Damper, 14 - Room thermostat, 17 - Heat source machine, 18 - Heat load measuring means, 19 - Damper control means, 20 - Blower control means. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Masuo Oiwa (2 others) 1st! ! ! 1 l: Angry ν leakage Figure 2 1. Indication of the incident: Patent Application No. 176465/1986 2,
Title of the invention Air conditioner 3, Representative of the person making the amendment Moriya Shiki 4, Agent 5, Subject of the amendment (1) Detailed description of the invention column 6 in the specification, Contents of the amendment (1) Specification In the 5th line of page 2 of the tube, the word ``Centrane'' has been corrected to ``Central.'' (2) On page 6, line 2 of the same document, the phrase ``in the hallway, etc.'' is corrected to ``in the hallway, etc.''

Claims (1)

[Claims] A heat source device that generates hot or cold air, a blower and duct that distributes the cold and hot air from this heat source device to each room, a damper that adjusts the air volume placed on the branch of this duct, and a room thermostat installed in each room. In an air conditioner equipped with a heat load measuring means for measuring the heat load in each room based on the room temperature detected by the room thermostat, and controlling dampers in specified rooms to open and dampers in other rooms to close. an air conditioner comprising a damper control means for controlling the air blower with a weak wind while stopping the heat source device until the difference in the room temperature of the specified room measured by the heat load measuring means becomes small; Machine.