JPH02287046A - Blower control device for air conditioner - Google Patents

Abstract

PURPOSE:To prevent a reduction of heating capacity due to the low outside temperature by setting the outdoor blower output data which determines the blowing capacity of the outdoor unit in accordance with the output from the outside temperature sensor, and controlling the operation of the outdoor unit blower based on such data. CONSTITUTION:The outdoor unit 15 has an outdoor unit blower 25 in front of its outdoor heat exchanger 17 and an outside temperature sensor 29 near to the air inlet 29 for the outdoor heat exchanger 17. The outdoor unit blower data determining means 30 in a micro processor 3 sets the outdoor unit blower output data which determines the blowing capacity of the outdoor unit blower 25 in accordance with the measured outside temperature, and, based on such output data, the outdoor unit blower operation control means 31 controls the operation of the outdoor unit blower 25 through an outdoor blower motor actuating means 32. This way, a reduction of heating capacity due to the low outside temperature can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blower for an air conditioner, and particularly to a control device for an outdoor blower.

[Conventional technology]

Fig. 5 is a control circuit diagram showing the blower control system f11f of a conventional air conditioner as disclosed in, for example, Japanese Patent No. 63-29140. A power supply circuit that rectifies the output of the power supply and supplies DC power to each circuit, (3) is a microprocessor that controls the blower, an input circuit (4), and a central processing unit 1k.
(hereinafter referred to as CPU), memory (6), and output circuit (7). (8) is a blower motor drive circuit that drives and controls the upper blower motor (9) and lower blower motor Ql) according to the output signal supplied from the output circuit (7), and αB is the representative temperature from the indoor intake air. Indoor temperature detector that detects Ta”.

a3 detects the air temperature Td near the floor -1, B floor temperature detector, α3 is the surface temperature Tl of the indoor heat exchanger) (
The detection output signal of each of these detectors (1, +1. (!3.α1) is output and supplied to the input circuit (4) of the microprocessor (3). .

Next, the operation will be explained. First, indoor temperature detector αB
c p U (5 ).

Next, the read representative temperature Ta, near-floor air temperature Tti, tube temperature T management) are processed by the CPU (5), and the calculation results are sent to the output circuit (7) to drive the blower motor. Output to circuit (8). And the upper blower (
9), was controlling the lower blower motor a.

[Problem to be solved by the invention]

The blower control device of conventional air conditioners is configured as described above, so even if the heating capacity decreases due to changes in outside air temperature and the air outlet temperature from the upper and lower outlets decreases, the air volume remains unchanged. (Depending on the operating condition of the conditioner, there is a possibility that the occupants will feel cold air, and there are problems such as not being able to generate the necessary heating capacity to always create a comfortable indoor environment under moderate conditions.) was there.

This invention was made in order to solve the above-mentioned problems. 1. It provides the necessary heating capacity to always create a comfortable indoor environment according to various outdoor conditions and operating conditions of the air conditioner. The purpose is to obtain a blower control device for an air conditioner that can perform the following functions.

[Means to solve the problem]

A blower control device for an air conditioner according to the present invention includes a heat exchanger having an inlet at the center of the front surface of an indoor unit, and an upper blower and a lower blower each having an outlet above and below the inlet. , an outdoor heat exchanger having suction ports at the rear and side surfaces of the outdoor unit; an outdoor blower provided in the front of the outdoor heat exchanger; and an outside air temperature detector provided on the outdoor unit suction port side of the outdoor heat exchanger; A blower control circuit is provided to control the air blowing capacity of the outdoor air blower KL according to the output of the outside air temperature detector.

[Effect]

The blower control device for an air conditioner according to the present invention detects the outside temperature using an outside air temperature sensor, especially during heating operation, and if the detected outside air temperature is low, increases the capacity of the outdoor blower and increases the amount of heat exchange, making it comfortable. It provides the heating capacity necessary to create a comfortable indoor environment.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, α4 is the indoor unit, (+5 is the outdoor unit, σe is the compressor, ay+Fi outdoor heat exchanger, Lshio is the pressure reducer, and a9 is the indoor heat exchanger installed in the center of the above indoor unit α4. are sequentially connected to the refrigerant pipes to form a refrigerant circuit #f.The circle is the indoor air suction port provided at the front of the indoor heat exchanger aS.

Together with the upper and lower air outlets an and a provided above and below, it constitutes the front surface of the indoor unit α4. Ω, 24 is an upper blower and a lower blower installed in the upper and lower air passages of this upper and lower air outlet, (c) is an outdoor blower, and (1) is an air outlet provided in the front of this outdoor blower. In the casing of the outdoor unit α9, suction ports (2) are provided on the rear and side surfaces of the outdoor heat exchanger Q71, respectively. Or use an outside air temperature sensor to check the outdoor unit σ.
It is provided near the four sides of the suction port of the outdoor heat exchanger αη of No. 9. ■ is a microprocessor (hereinafter referred to as a microcomputer), which includes an outdoor blower output data determining means ω that determines the air blowing capacity of the outdoor blower using the detection signal of the outside air temperature detection Masuda as an input signal, and this outdoor blower output data determining means ω. The outdoor blower motor drive means T31 controls the operation of the outdoor blower according to the output data of the outdoor blower.

FIG. 2 is a block diagram showing the control circuit in FIG.
) and an output circuit ()). (to) is an outdoor blower motor drive means which inputs the output signal from the output circuit (7), and outputs a drive signal to the outdoor blower □□□.

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

First, in step ηa, the outside temperature TO is input to the input circuit (4
) to the CPU (5).

? In step Xec+41), the reference air blowing output step number m of the outdoor blower is determined based on the outside temperature T[]. The blowing capacity of the outdoor blower is determined by the number of steps m, and the higher the number of steps, the better the blowing capacity.

Next, in the next step, the output of several meters is output from the output circuit (7) to the outdoor blower! The rotation of the outdoor blower 6 is controlled by supplying it to the motive drive means (to). Then, the process returns to step t4[+.

In addition, in the above embodiment, the case has been explained in which the blowing capacity of the outdoor fan 6 is controlled by detecting only the outside temperature TO. An operation 70-chart showing O control # during heating operation in the following cases including (for example, υ1 rotation speed of the compressor) is shown in FIG.

In the flowchart shown in FIG. 4, the sequence and layout are the same as those in FIG. 3 of the first embodiment (4-).

In step (50), based on various factors other than the outside temperature TQ, first the standard air output step number rn of the outdoor fan is determined.
'fr decide. In step (51), step (5
A new m is determined by adding all the corrections based on the outside temperature TQ to the m determined above.

Even if the rotational speed of the outdoor blower □□□ is controlled in the same manner thereafter, the same effects as in the first embodiment can be obtained.

〔Effect of the invention〕

As described above, according to the present invention, an outside air temperature detector for detecting the outside air temperature is provided on the rear suction port side of the outdoor heat exchanger of the unexpected unit, and the air blowing capacity of the outdoor blower is fully adjusted according to the output of this outside air temperature sensor. This system is equipped with a blower motor drive means that determines outdoor blower output data, controls the operation of the outdoor blower according to the determined output data, and operates the outdoor blower according to the output of the operation control. Prevents heating capacity from decreasing due to temperature drop.

This has the effect of providing the heating capacity necessary to create a comfortable indoor environment.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing a control device for a blower 1 of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a control circuit for the blower 'gl motor of FIG. FIG. 203 is a flowchart of the operation sequence of 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 blower control circuit of a conventional 2-air V4 machine. (3111 Ficroprocessor, αn is the indoor unit. α5Fi outdoor unit, αn is the outdoor heat exchanger, 6 is the outdoor blower, or air outlet, or outside temperature detector, ■ is the outdoor blower output data determination means, oIl (1 outdoor blower motor drive means 1 outlet means 1 outdoor blower room drive means. In the figures, the same reference numerals indicate the same or corresponding parts).

Claims (1)

[Claims] 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. An upper blower outlet and a lower blower outlet are provided above and below the mouth, an upper blower and a lower blower are respectively placed at the rear of the upper and lower blowholes, and the outdoor unit has suction ports on the rear and side surfaces, and an air outlet is provided on the front. In an air conditioner in which an outdoor blower is placed in front of the inlet of the outdoor unit, an outside air temperature detector for detecting outside air temperature is provided at the rear inlet of the outdoor heat exchanger, and the output of this outside air temperature detector is outdoor blower output data determining means for determining the air blowing capacity of the outdoor blower according to the outdoor blower output data determining means; outdoor blower operation control means for controlling the operation of the outdoor blower according to the output data of the outdoor blower output data determining means; and this outdoor blower operation control means. 1. A blower control device for an air conditioner, comprising an outdoor blower motor drive means for operating the outdoor blower according to an output from the air conditioner.