JPH0539394Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a blower for an air conditioner, and particularly relates to a control device for a vertical blower.

[Conventional technology]

Conventionally, indoor environment comfort control has been achieved by using a blower in an indoor unit to take indoor air through a heat exchanger, and then returning the heat-exchanged air back into the room.

Fig. 5 shows a control circuit of a conventional blower control device shown in, for example, Japanese Patent Application Laid-Open No. 63-29140. A power supply circuit 3 that supplies DC power is a microprocessor that controls the blower, an input circuit 4 and a central processing unit (hereinafter referred to as
It consists of a CPU (referred to as CPU) 5, a memory 6, and an output circuit 7. Reference numeral 8 denotes a blower motor drive circuit that drives and controls the upper blower motor 9 and the lower blower electric section 10 in accordance with the signal output from the output circuit 7 of this microprocessor, and 11 detects a representative temperature Ta from the indoor air intake. Indoor temperature detector, 12 is a floor temperature detector that detects the air temperature Td near the floor, 13 is the surface temperature of the indoor heat exchanger
This is a tube temperature detector for detecting Tb (hereinafter referred to as tube temperature), and the detection output signals of these detectors 11, 12, and 13 are output to the input circuit 4 of the microprocessor 3.

Next, the operation will be explained.

In the blower control device, first, the representative temperature Ta detected by the indoor temperature detector 11 and the floor surface temperature detector 1 are
The air temperature Td near the floor surface detected by No. 2 and the tube temperature Tb detected by the tube temperature detector 13 are read into the CPU 5 via the input circuit 4 as input signals.

Next, the read representative temperature Ta, near-floor air temperature Td, and tube temperature Tb are subjected to calculation processing by the CPU 5, and the calculation results are outputted to the blower motor drive circuit 8 via the output circuit 7. Then, the upper blower electric motor 9 and the lower blower electric section 10 were controlled.

[The problem that the idea attempts to solve]

Conventional blower control devices are configured as described above, so they are not only unable to detect changes in indoor temperature distribution due to changes in outside air temperature, but also can give occupants a sense of airflow depending on the operating status of the air conditioner. However, there were also problems such as the inability to optimally control the blower to create a comfortable indoor environment under various conditions.

This idea was made to solve the above problems, and it is an air system that can perform optimal ventilation control to always create a comfortable indoor environment according to various outdoor conditions and the operating status of the air conditioner. The purpose is to obtain a blower control device for a harmonizer.

[Means to solve the problem]

The blower control device for an air conditioner according to this invention has an indoor unit and an outdoor unit, an inlet at the center of the front of the indoor unit, an outlet at the top and bottom of the inlet, and an upper blower at the rear of the outlet. and a lower blower, a temperature detector for detecting the outside temperature is provided in the outdoor unit, and a reference blower output data determining means for determining reference blower output data of the upper and lower blowers according to the output of the detector; A blower operation control means for controlling the operation of the upper and lower blowers according to output data of the means, and a blower driving means for driving the upper and lower blowers according to the output of the control means are provided.

[Effect]

The air conditioner blower control device in this invention detects the outside air temperature using an outside air temperature detector, especially during heating operation, and if the detected outside air temperature is low, the
A comfortable indoor environment is created by optimal blower control that increases the ratio of the blowing capacity of the lower blower to the blowing capacity of the lower blower, increasing the amount of hot air from beneath the occupants' feet.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. In the figure, 14 is an indoor unit, 15 is an outdoor unit, 16 is a compressor, 17 is an outdoor heat exchanger, 18 is a pressure reducer, and 19 is the indoor unit 14.
This is an indoor heat exchanger placed in the center of the refrigerant circuit, which is connected sequentially by various refrigerant pipes to form a refrigerant circuit. 20 is an outdoor blower, 21 is an indoor air inlet provided on the front surface of the indoor unit 14, and 22 is an upper and lower outlet provided above and below this inlet. Inside these outlets are an upper blower 23 and a lower blower. 24
has been set up. Reference numeral 25 denotes an outside air temperature detector, which is provided near the outdoor heat exchanger 17. Reference numeral 3 denotes a microprocessor, which includes upper/lower blower reference air flow rate output data determining means 26 for determining reference air flow rate output data of the upper/lower blowers based on the detection signal of the outside air temperature detector 25; The output signal of the reference air flow rate output data determining means is input.
It is composed of a lower blower operation control means 27.

FIG. 2 is a block diagram showing the control circuit of FIG.
An input circuit 4 which receives the detection signal of
, a memory 6 and an output circuit 7. 28 is upper/lower blower driving means which receives the output signal from the output circuit 7, and outputs a driving signal to the upper blower motor 9 and the lower blower electric section 10.

Next, the operation will be explained.

FIG. 3 is an operation sequence flowchart showing control during heating operation of the blower control device according to this embodiment.

First, in step 30, the outside air temperature detector 25
Inputs the detected outside temperature To to the CPU via circuit 4.
Load into 5.

Next, in step 31, the reference air flow rate output step numbers m and n of the upper blower motor 9 and the lower blower motor 10 are determined based on the outside temperature To. The blowing capacity of the upper blower 23 and the lower blower 24 is determined by the number of steps.

Next, in step 32, an output signal with a predetermined number of steps m is passed through the output circuit 7 to the upper/lower blower driving means 2.
8 controls the rotational speed of the upper blower motor 9.

Next, in step 33, the rotational speed of the lower blower electric section 10 is controlled by supplying the output signal of the predetermined number of steps n to the blower driving means 28 via the output circuit 7. Then return to step 30.

Further, in the above embodiment, a case has been described in which the air blowing capacity of the upper blower 23 and the lower blower 24 is controlled by detecting only the outside temperature To, but not only the outside temperature To but also various other factors are controlled. FIG. 4 shows an operation sequence flowchart showing control during heating operation when (for example, indoor temperature) is included.

In FIG. 4, steps 41, 43, and 44 are the same as in FIG. 3 of the first embodiment. In step 40, the outside temperature
Based on various factors other than To, first, the reference blower output step numbers m and n of the upper blower motor 9 and the lower blower motor section 10 are determined.

In step 42, new m and n are determined by correcting m and n determined in step 40 by the outside temperature Ta.

Even if the rotation speeds of the upper/lower blower motors 9 and 10 are controlled in the same manner thereafter, the same effects as in the first embodiment can be obtained.

[Effect of idea]

As described above, according to this invention, an outside temperature detector is provided near the outdoor heat exchanger of the outdoor unit to detect the outside temperature, and the reference air blow output data of the upper and lower blowers is determined according to the output of this temperature sensor. The system is equipped with a blower drive means that controls the operation of the upper and lower blowers according to the determined output data, and also operates the upper and lower blowers according to the output of the operation control. If it is low,
The effect of creating a comfortable indoor environment by changing the indoor temperature distribution according to changes in outside air temperature, such as by increasing the ratio of the air blowing capacity of the upper and lower blowers to that of the lower blower to increase the amount of warm air from the occupant's feet. It has the following.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing a blower control device for an air conditioner according to an embodiment of this invention, Fig. 2 is a block diagram showing a control circuit of the blower motor shown in Fig. 1, and Fig. 3 is a block diagram showing the control circuit of the blower motor shown in Fig. 2. FIG. 4 is an operation sequence flowchart showing another embodiment corresponding to FIG. 3, and FIG. 5 is a block diagram showing a conventional air conditioner blower control circuit. 17 is an outdoor heat exchanger, 23 is an upper blower, 24
is the lower blower, 25 is the outside temperature detector, 26 is the upper/
27 is upper/lower blower operation control means, and 28 is upper/lower blower driving means. In the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] The indoor heat exchanger installed in the indoor unit, the pressure reducer installed in the outdoor unit, the outdoor heat exchanger and the compressor are connected by refrigerant piping, and a suction port is installed in the center of the indoor unit. In an air conditioner in which an upper air outlet and a lower air outlet are provided above and below the air outlet, and an upper blower and a lower air blower are respectively arranged at the rear of the upper and lower air outlets, an outdoor heat exchanger installed near the outdoor heat exchanger to detect the outside temperature an air temperature detector, an upper/lower standard air blowing output data determining means for determining the air blowing capacity of the upper blower and lower blower of the indoor unit according to the output of the outside temperature detector; and the upper/lower standard air blowing output data determining means. An upper/lower blower operation control means for controlling the operation of the upper blower and the lower blower according to output data, and a blower driving means for operating the upper blower and the lower blower according to the output of the upper/lower blower operation control means are provided. A blower control device for an air conditioner characterized by: