JPS6073234A - Air-conditioning machine - Google Patents

Abstract

PURPOSE:To provide the air-conditioning machine capable of controlling temperature so as to satisfy a set temperature by a method wherein a temperature difference, generated in a living space, is corrected separately upon room heating operation and room cooling operation respectively. CONSTITUTION:H signal is outputted upon room heating operation and L signal is outputted upon room cooling operation from a terminal O5 to the switching elements 10, 13 of a control unit 17. The control unit 17 changes the value of resultant resistance determined by resistors 5-9 by switching the terminals O1- O4 sequentially from H output to L output. Accordingly, the output of a bridge circuit 2, determined by the value of resultant resistance and the value of resistance of a temperature sensitive element 1, is decided by a comparator 18 and H or L signal is outputted to the control unit 17. The control unit 17 decides the detecting temperature of the temperature sensitive element 1 based on the H or L signal and controls ON-OFF of a compressor 19. The air-conditioning machine, thus constituted, effects the correction upon room heating operation by a variable resistor 12 based on the shape and volume of the living space and effects the correction upon room cooling operation by the variable resistor 15 separately.

Description

Detailed Description of the Invention (a) Industrial Application Field The present invention relates to the temperature control of air conditioners, and in particular, the installation of a temperature sensing element for detecting the temperature of the conditioned air is based on the position and actual living space. This relates to correction of temperature differences.

(b) Conventional techniques Generally, this type of air conditioner is installed in a living space, detects the temperature of the air to be conditioned, and operates the air conditioner based on this temperature, for example, turns on the compressor. was under control. At this time, if the air conditioner is installed in the upper part of the living space, such as a ceiling-suspended type or a ceiling-embedded type, a temperature-sensing element to detect the temperature of the conditioned air is installed at the air intake port of the air conditioner. Air conditioners with this type of structure were unable to provide comfortable air conditioning due to the temperature difference between the top and bottom of the living space.

For example, during heating operation, warm air accumulates in the upper part of the living space, a temperature sensing element detects the temperature of this warm air, and the air conditioner is controlled based on this temperature. For some people, the temperature was low compared to the set temperature (21. they had to set the temperature higher than the set temperature).

Furthermore, the temperature difference between the upper and lower parts of the living space varies depending on the shape and volume of the living space. During cooling operation, as well as during heating operation, a temperature difference occurs within the living space, and it is not possible to perform appropriate temperature control based on the temperature setting. It was not possible to set the temperature to a constant value because the temperature difference as described above is different.

In addition, if the temperature sensing element is attached to a remote controller on the wall and separated from the air conditioner, it is possible to detect the temperature at the bottom of the living space, but due to the temperature and heat capacity of the wall, a temperature difference will occur as above. However, depending on the shape and volume of the living space, there is a problem in that there is no air convection near the remote controller, and control over temperature changes is slow (and comfortable air conditioning cannot be achieved).

(c) Purpose of the Invention In view of the above problems, the present invention provides an air conditioner that corrects the temperature difference occurring in a living space during heating operation and cooling operation, and performs temperature control commensurate with the set temperature. It provides:

B) Structure of the Invention The air conditioner of the present invention includes a temperature sensing element for detecting the temperature of conditioned air, a bridge circuit having this temperature sensing element, a variable resistor connected in parallel to one side of this bridge circuit, and a heater. a first series circuit comprising a switching element that is turned on during operation; a second series circuit comprising a variable resistor connected in parallel to one side of the bridge circuit; and a switching element that is turned on during cooling operation; and the bridge circuit. Since it is equipped with a control unit that controls operation based on the output of This is how it was done.

(E) Example Below, an example in which the present invention is applied to a ceiling-suspended air conditioner will be explained based on the drawings. It also constitutes the negative side of the bridge circuit (2). (3)
, (4) are resistors, and similarly to the temperature sensing element (1), they each constitute the negative side of the bridge circuit (2).

(5) to (9) are resistors whose resistance values are synthesized by signals from the control unit, which will be described later, and similarly to the above, the bridge circuit (
2). 00) is a switching element, which is connected in parallel with resistor (4) and constitutes a first series circuit together with resistor (11) and variable resistor (IZ). ([3
) is a switching element, which is connected in parallel to the resistor (4) and constitutes a second series circuit together with the resistor α4) and the variable resistor α5), and further controls the switching signal applied to the switching element (13). f (a transistor θ6 that inverts −L) is provided. (17) is a control unit, which has terminals (d,) connected to switching elements (10) and (13).
The H signal is output during heating operation, and the I signal is output during cooling operation.
Output a signal.

In addition, this control unit (Iη) sequentially switches the terminals (0,) to (04) to H (→L output) to change the composite resistance value determined by the resistors (5) to (9). Therefore, this composite resistance value A bridge circuit (2) determined by the resistance value of the temperature sensing element (1) and
) is judged by the comparator (I8) and sent to the control section (Iη).
(Or outputs an L signal.Control unit (17)
) is the temperature sensing element (1) based on this) I or L signal.
The compressor (I9) is controlled ON-OFF based on the detected temperature.

In the air conditioner constructed in this manner, correction during heating operation is performed using variable resistors (15), and correction during cooling operation is separately set using variable resistors (15), based on the shape and volume of the living space. If you set each of these during the trial run of the air conditioner, you will not need to set them thereafter. First, during heating operation, the output of the control unit ((η terminal (?5W) is H, so the 1 Switching element 00) of the series circuit is ON
state, first resistor (4), resistor (11), variable resistor (I
are connected in parallel. Also, transistor 06) is OFF.
Since it is in the F state, the switching element (I
3) remains in the OFF state. Therefore, this bridge circuit (2) converts the temperature actually detected by the temperature sensing element (1) to a lower value.

In this state, the control unit (17) connects the terminals (◇,) to (
By changing the output of 04) and changing the combined resistance value determined by resistors (5) to (9), the temperature value converted by the bridge circuit (2) is determined from the change in the output of the comparator (1). It is something.

Furthermore, this control section (1'O) compares this temperature value with the set temperature and controls the 0N-OFF' of the compressor (1!'ll).
[It is something that

Also, during cooling operation, the output of the terminal (◇,) of the control unit 07) becomes L, and the switching element (10) of the first series circuit becomes 01" F state, and at the same time, the transistor OQ is turned on.
state, and the switching element (I3) of the second series circuit is turned on. Therefore, this bridge circuit (2) converts the temperature actually detected by the temperature sensing element (1) to a higher value. In this state, the control unit (I7) changes the output of the terminals (0,) to (◇4) and changes the resistances (5) to (
The combined resistance value determined by step 9) is changed, and the temperature value converted by the bridge circuit (2) is determined from the change in the output of the comparator a. Furthermore, this control unit αη compares this temperature value with the set temperature and turns the compressor (19) ON-OFF.
It controls the

In the above embodiment, when the switching element ([0) is in the ON state, the detected temperature of the temperature sensing element (1) is outputted lower than the actual temperature, and when the switching element ([0] is in the ON state, the detected temperature of the temperature sensing element (1) is outputted lower than the actual value). Resistors (3) and (4) of the bridge circuit (2) are set so that the output is higher than the actual value.

Also, the first series circuit and the second series circuit are bridge circuits (2)
They may be provided in parallel on either side. However, in this case, each resistor (3
), (4) must be set.

(f) Effects of the Invention The air conditioner of the present invention includes a temperature sensing element for detecting the temperature of conditioned air, a bridge circuit having this temperature sensing element, and a variable resistor connected in parallel to one side of the bridge circuit. and a first switching element that is turned on during heating operation.
a second series circuit consisting of a series circuit, a variable resistor connected in parallel to one side of the bridge circuit, and a switching element that is turned on during cooling operation; and a control unit that controls operation based on the output of the bridge circuit. Correction of the temperature difference that occurs in the living space due to uneven heating can be set separately during heating operation and cooling operation, allowing quantitative air conditioning to be performed in accordance with the actual living space.

[Brief explanation of drawings]

The drawing is an electrical circuit diagram of an air conditioner showing an embodiment of the present invention. (1)... Temperature sensing element, (2)... Bridge circuit,
00), ([3)... switching element, 02)
, (15)... variable resistor, ([7)... control section.

Claims (1)

[Claims] (1) A temperature sensing element that detects the temperature of conditioned air. A first series circuit including a bridge circuit including the temperature sensing element, a variable resistor connected in parallel to one side of the bridge circuit, and a switching element that is turned on during heating operation; a second series circuit consisting of a variable resistor and a switching element that is turned on during cooling operation; and an output vc of the bridge circuit.
An air conditioner comprising: a control section that controls operation according to i'+F.