JPS613936A - Controlling device for air-conditioning machine - Google Patents

Abstract

PURPOSE:To save energy by a method wherein a set value range varing switch is provided in the captioned device controlling by the comparison of temperature and set temperature of a room to be air-conditined. CONSTITUTION:A manual switch 24 for varying temperature setting width is provided on a remote control panel 23 together with an operation changeover switch 25. By the operation of the switch 24, an always opening contact piece 30 is closed by the conduction of a relay 29 and a luminescent element 27 is lighted at the same time. A set indoor temperature Ts is changed by the closing of the always opening contact 30 through a predetermined changing procedure into a range from 19 deg.C to 24 deg.C. According to this constitution, the set room temperature is change, room heating without over-heating or shotage of capacity may be effected, energy may be saved and the shortage of capacity may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION H) Industrial Application Field The present invention relates to the control of an air conditioner whose operation is controlled based on the temperature set value of a room to be conditioned, and in particular to the switching of the setting range width of the temperature set value. It is related to.

(b) Conventional technology General control As a conventional air conditioner control device, it was
There was one described in Japanese Patent No. 6-99334. In Figure 9 showing the contents of this publication, (TH)
is a one-degree detector that detects the temperature of the conditioned room, (VR) is a variable resistor that determines the temperature set value, and the comparator (OP) is a reference voltage determined by the resistors (RI, ) and (R1). Previously, it was decided whether to start or stop the air conditioner by comparing the voltage from the temperature detector (TH) and variable resistor (VR) K, but in this type of control device, the temperature set value is determined by comparing the voltage from the variable resistor (VR) K. The adjustment value is determined by K, and the setting range width is determined by the resistance value of the variable resistor (VR). Therefore, depending on the user's preferences, the temperature setting value may always be set to the maximum or minimum value, resulting in more heating or cooling operation than necessary, resulting in poor energy efficiency.

(c) Purpose of the Invention In view of the above problems, it is an object of the present invention to provide a control device for an air conditioner that prevents excessive heating or cooling operation by changing the setting range width of the temperature setting value.

B) Structure of the invention The present invention has a temperature detector that detects the temperature of the conditioned room,
In this air system, which controls the operation by comparing the temperature detected by the temperature sensor and the set value, a switch is installed to change the setting range of the temperature set value, so that the temperature set value is not set to a value higher than necessary. It is designed to prevent this from happening.

(e) Example The following is an example of the present invention based on FIGS. 1 to 8. To explain, first, FIG. , four-way valve (2), indoor heat exchanger (3), liquid reservoir (4), pressure reducer (5), (6), and outdoor heat exchanger (7) are connected in a ring with refrigerant piping for refrigeration. It consists of a cycle. Note that (8) is a reverse valve through which the refrigerant passes only when the K refrigerant flows in the direction indicated by the dotted line (during cooling operation). Further, (9), al is the first and second electric heaters, which are 2KW and 3KW, respectively. 0υ is indoor heat exchanger (3)
The wholesaler is an outdoor heat exchanger (power blower (propeller fan)).

In this figure, if the four-way valve (2) is in the position shown, the refrigerant discharged from the compressor (1) will flow in the direction i indicated by the solid line arrow.
VC@, the indoor heat exchanger (3) acts on the condenser, and the outdoor heat exchanger (7) acts on the evaporator to perform heating operation. Moreover, if the four-way valve (2) is switched to the opposite position from the one shown in the figure, the refrigerant discharged from the compressor (1) flows in the direction of the dotted arrow, and the indoor heat exchanger (3) is switched to the evaporator and the indoor heat exchanger, respectively. The outer heat exchanger (7) acts as a condenser to perform cooling operation.

Figures 2 and 3 are electrical circuit diagrams used to control the operation of the refrigeration cycle shown in Figure 1, and between Figures 2 and 3 are ■ and ■.
connected with. Furthermore, the same components as in FIG. 1 include a compressor (1), a four-way valve (2), a first electric heater (9),
The second electric heater (11), the indoor side blower αυ, and the outdoor side blower aa are not given the same reference numerals.

Note that the wind speed of the blower a0 can be switched between strong 0, medium M, and weak (T), and the wind speed of the blower t1 can be switched between strong 0 and weak peak).

In FIGS. 2 and 3, a microprocessor is shown operating in conjunction with the following peripheral circuits.

The details of the operation of this microprocessor (1) will be described later.A4 is a power supply circuit, which includes a rectifying element a9, a smoothing capacitor (161, η, a Zener diode a~, a power transistor α9, a normally closed contact, a power supply The comparator (21) that resets the terminal (INIT) K of the microprocessor Q31 when it is turned on, a constant voltage (■□) lower than vA□
, ).The terminal (■.) is the negative power supply terminal.@ is the remote control panel, with the manual switch CI!4) and the changeover switch (
c) is provided separately from the main body of the air conditioner. In addition, the changeover switch (c) is the terminal (5) for switching the contact piece,
(J3), (having 0, terminal) is a neutral terminal, then
The contact piece is a terminal (when switching to ARK, the contact piece is a terminal (G))
The terminal (Bl) can be switched manually between 0 and 0.The manual switch 04 is used to change the temperature setting range, and the changeover switch (c) is used to stop the operation of the air conditioner. (5) is a light-emitting element, and is separated by three wires.
24), lights up when the selector switch (29) is operated.

(to), □□□ are relays, each with a normally closed contact (20)
, has a normally open contact piece (to). 01) to 6η are connected to the terminals (D
6) to (Dl2), which are connected in order between normally open contacts, normally open contacts (41, normally open contacts ρυ, switching contacts (42, (43, switching contacts)). 0, (
451, normally open contact piece (46), normally open contact piece (4η). (4 townhouse rapid heating switch, relay C34)
, C37) are energized regardless of the output of the microprocessor (13).

Note that (4!19, ra) are diodes for preventing malfunction.

61) to the board, this is the terminal (4) of the microprocessor 03.
) and terminals (D3) to (D5), (Dl5), which is a temperature sensor (such as a negative characteristic thermistor),
The indoor heat exchanger (3
), and the outdoor heat exchanger (for power temperature detection, outdoor temperature detection. 54) is a slide switch for temperature setting, and the terminal of the microprocessor Q31 (
When there is an output at Dl), the terminals (K1) to (K4) are scanned and set values are read. Also, 6!
lil is a diode for preventing erroneous reading. (
5 This is a slide switch that sets the wind speed of the dark blower αυ, and when the microprocessor (13 terminal (DO) has an output, it scans the busy terminals (K1) to (K4) and reads the setting value. Note that IQI, 11) is a diode for preventing erroneous reading. 13 and (f) are respectively an operation/stop switch and a heating/cooling operation selection switch. Note that 16 is a diode for preventing erroneous reading, and +661 is a manual switch. Figure 2,
The states of the relay contacts shown in FIG. 3 are all when the relay is not energized.

Next, FIGS. 4 and 6 are flowcharts showing the operation of the microprocessor Q, and are as follows. However, this flowchart only shows a part of the operation of the air conditioner, and does not show all the operations.

First, select the cooling operation/heating operation selection switch (if 63 is set to heating operation, perform the "reset &start" process. This is a start process when the power is turned on, etc., and when the power is turned on, the comparator C!) ) to the terminal (INIT) of the microprocessor H, a reset process is performed, and the air conditioner is maintained in a stopped state. In addition, even when the relay (c) is energized (the normally closed contact wire is opened), K IJ is set in this way and the air conditioner is stopped.Next, the operation switch 12 is pressed and the operation is stopped. When the heating starts, the electric heater (f9B2KW) is energized to improve the start-up of the heating operation.

Next, it is determined whether the switch output is ON or not, and the switch output is OFF.
N and the air conditioner is not operating (stopped), the room temperature (Tin) in the conditioned room is Tin≦To (=
3.5 degrees)'', the electric heater (1G) is started and the electric heater α is kept energized until the temperature rises to "Tin≧TI (=5.5 degrees)".In addition, T, The value of %T is not limited to this, and may be arbitrarily set according to surrounding conditions.

At this time, it is necessary to set an appropriate differential width as "T+>To".

Next, if the switch needle is OFF or the air conditioner is operating, read the room temperature set value (T,) set with the slide switch 54).At this time, if the normally open contact of the relay handle is ON Using the conversion diagram in Figure 5, the value of T is
,=F (T,)" directly stores the value after Ic conversion, or if the normally open contact (7) is OFF, directly stores the value of T, and based on this value (T,), the compressor (1 ), electric heater (9),
Control α0 operation or energization.

That is, the outside temperature (Tout) is 'Tout≧T, (=
1.67 degrees)", heat pump operation by the compressor (1) and heating operation by the electric heater (9) and K are performed. If Tout≧T%, the compressor (1) is maintained in a stopped state, And only the heating operation is performed by the electric heater (9) and Qo. At this time, especially the electric heater (9) starts to be energized when the room temperature (Tin) is Tin≦T, -1".
It has a differential whose current is cut off when in≧T,'. In addition, when the compressor (1) is 0N-OFF
In order to prevent chattering due to
A differential may be provided at a temperature at which the switching occurs.

In the above explanation, the compressor (1), electric heater (9)
, Ql is actually operated or energized when the output of the microprocessor (13 terminals (D8), (Dll), and (D12) becomes ground level and the relay is activated.
) is energized and its normally open contacts (4υ, (46), (4
7) by closing. Furthermore, the compressor (1), electric heater (9), (kl is ON once)
Once the switch is in the ON state, the ON state is maintained until the OFF state is set.

Next, during cooling operation when the four-way valve (2) has switched to the state shown in Fig. 1 and the reverse pressure, when the operation is started, the room temperature set value (T, ) set with the slide switch 64) is first set. At this time, if the normally open contact (to) of relay Q9 is ON, convert the value of T8 to T,=G(T8)'' using the conversion diagram in Figure 7, and then convert the value to normally open. If one side is OFF, the value of T is directly memorized, and based on this value (T8)K, the operation of the compressor (1) becomes ON when "Tin≧T", and "Tin (
At this time, a differential is provided at the temperature at which the compressor (1) changes from 0N to OFF to prevent chattering from 0N to OFF of the compressor (1). is also good.

Figure 3 is an electrical circuit diagram of the power section connected by ■ of the terminal in Figure 2, where - in the figure is a power transformer, the older sister is a varistor for surge absorption, and (70) to A are for protection. Current news or temperature fuse, (7) main switch of the dark air conditioner, σ is the AC commercial power source.Other components are the same as the above description, so they will be omitted.

When the air conditioner configured as described above is operated, it is operated under the conditions shown in FIG. 8 depending on the outside air temperature (Tout), the indoor temperature (Tin), and K. Outside temperature (T
out) is Tout≦T2”, the compressor (1) is O
It becomes FF and heating operation is performed by the electric heater (9), a. After this, keep Tout≦T, H at room temperature (
When the temperature (Tin) increases and becomes 'Tin≧T,n, the electric heaters (9) and 00 are turned off. Hereafter “Tout)T
Heating operation is performed by the electric heater (9), a [K] until the temperature reaches 2". When the outside temperature is low and sufficient heat pump operation cannot be maintained by the refrigeration cycle, the heat pump operation is stopped and the outside temperature is (Tout)
If the temperature rises to ``Tout〉T,', the heating operation by the heat pump operation can be sufficiently busy, so the compressor <11
and heating operation by energizing the electric heater (9).

In addition, when the air conditioner is not operating, the temperature inside the conditioned room (Tout) decreases as the outside air temperature (Tout) decreases.
in) decreases and Tin≦ToP+ and the switch iron is O.
If it is in the N state, the electric heater Ql is automatically energized and heating operation is performed until “Tin≧T,′.This prevents the water from freezing due to a temperature drop in the conditioned room. This can prevent the door from freezing.

Furthermore, a remote control panel (c) separate from the main body of the air conditioner
When the manual switch (24) is operated from a remote location, the relay (c) is energized and the normally open contact piece (to) is closed, and at the same time the light emitting element (5) lights up. When the normally open contact piece □□□ closes, the room temperature set value (T
, ) is converted to T, =F ('rg)''.In other words, the setting range of the room temperature setting value (T,) is 16≦T.

By changing from ≦27'' to 19≦T and ≦24'', heating operation can be performed without overheating or insufficient capacity. Further, when the changeover switch (c) is operated, the relay (28) is energized to open the normally closed contact and cut off the power supply to the microprocessor 03. When power is supplied again, a "reset and start" process is performed based on the microprocessor (13ts) chart 70 in FIG.

That is, the microprocessor (13) is reset,
The air conditioner is in a stopped state.

In addition, when defrosting operation is busy during heating operation, the outdoor heat exchanger (7
) is detected by a temperature sensor, and defrosting is started when the temperature change of this outdoor heat exchanger (7) reaches two constant conditions. Regarding the prevention of cold air, a general method is used in which the blower (11) is stopped for a certain period of time based on the temperature trap of the indoor heat exchanger (3). In addition, regarding the control of the ventilation wall and a2, the setting value of the slide switch I5'l or the compressor (1),
This is done based on the state of the electric heater (9), Q.

(f) Effects of the invention The present invention has a temperature detector that detects the temperature of the conditioned room,
In air conditioners that control operation by comparing the temperature detected by the temperature sensor and the set value, we have installed a switch that changes the setting range of the temperature set value. This prevents the output voltage from being set too large or too small, prevents over-capacity operation or under-capacity operation, and enables efficient operation. In addition, in the above embodiment, a relay contact piece was used as a switch, but if a manual switch is provided in place of this contact piece so that the user can operate it as desired, the width of the setting range can be changed according to the needs of the room to be harmonized. It can be switched to prevent over-capacity operation or under-capacity operation, and to always perform air conditioning at the optimum capacity.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an air conditioner using an embodiment of the present invention;
Figure 2 is an electric circuit diagram used to control the air conditioner shown in Figure 1, Figure 3 is an electric circuit diagram used to control the air conditioner also shown in Figure 1, and Figure 4 is the electric circuit diagram used to control the air conditioner shown in Figure 2. FIG. 5 is a conversion diagram showing the relationship between T and p('rg), and FIG. 6 is a flow chart showing the operation of the microprocessor shown in FIG. 2 during heating operation. A flowchart showing the operation during operation, FIG. 7 is a conversion diagram showing the relationship between TIl and G (T,), and FIG. 8 is a diagram showing the compressor, first and second FIG. 9, which is an explanatory diagram showing the operation or energization state of the electric heater, is an electric circuit diagram of a conventional air conditioner control device. (1)...Compressor, (3)...Indoor heat exchanger,
(5), (6)...pressure reducing device, (power...outdoor heat exchanger, (9)...first electric heater, 00)・
...Second electric heater. Applicant: Sanyo Electric Co., Ltd. and one other representative: Patent attorney: Yasuo Sano

Claims (1)

[Claims] (1) In an air conditioner that has a temperature detector that detects the temperature of a room to be conditioned and controls operation by comparing the detected temperature of this temperature detector and a set value, the width of the setting range of the temperature set value is A control device for an air conditioner, characterized by being provided with a switch for switching.