JPS5829797Y2 - air conditioner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner that can accurately display whether or not the indoor temperature is controlled to a comfortable state, thereby increasing the convenience of the user.

Air conditioners, such as air conditioners, are small machines for general household use that are equipped with an automatic temperature control operation mechanism, but conventional air conditioners of this type are equipped with an indicator that indicates that the automatic temperature control operation is in progress. Since there is no display to judge whether the indoor temperature is being controlled to a comfortable state, the user is forced to rely on a separately installed thermometer or to judge by feeling. The inconvenience that often occurs when the controlled operation is in a state that is uncomfortable for the user cannot be avoided.

The present invention focuses on the current situation and aims to improve it. In particular, when the actual temperature of the area to be air-conditioned has a certain slight temperature difference from the set temperature, the indicator lamp is installed. It is designed to facilitate the user's visual judgment by turning on the light, and includes a temperature detection circuit that detects the temperature of the area to be air conditioned, and a start-up circuit that has a certain temperature difference between the stop temperature point and the stop temperature point. A start command is issued by comparing the temperature of the air conditioned area with the stop temperature point, a stop command is issued by comparing the temperature of the air conditioned area with the start temperature point, and a stop command is issued by comparing the temperature of the air conditioned area with the start temperature point. a first comparison circuit that issues a stop command instead of a start command when the temperature of the air-conditioned area exceeds the stop temperature point, and issues a start command instead of a stop command when the temperature of the air-conditioned area exceeds the start temperature point; A temperature setting circuit is provided, which includes a compressor control circuit that stops the compressor in response to a stop command from the first comparison circuit and starts it in response to a start command. A second comparator circuit whose temperature point is opposite to both temperature points of the circuit and whose lighting temperature point is set between the stop temperature point and the start temperature point; By adopting a configuration in which a temperature display circuit is provided, which includes a temperature display circuit that turns off the light when the temperature is turned off and a display light control circuit that turns the light on in response to a lighting command, the desired object can be achieved.

Hereinafter, one embodiment of the present invention will be further described in detail with reference to the accompanying drawings.

Figure 1 shows the electric circuit of the control command system of the air conditioner according to the present invention.
Figure 2 also shows the electrical circuits of the power system, 1
2 is a temperature setting circuit, and 2 is a temperature display circuit.

The temperature setting circuit 1 consists of a temperature detection circuit A, a first comparison circuit B, and a compressor control circuit C, while the temperature display circuit 2 consists of a second comparison circuit and an indicator light control circuit E. configured.

Temperature detection circuit A includes, for example, a negative characteristic thermistor 3 that detects the temperature of the air-conditioned area (indoor) as an amount of electrical displacement, and a temperature setting device 4 that uses a variable resistor as an element and can convert the set temperature into an amount of electricity, which are connected in series. and then contact the DC power supply.
A comparator 6, which will be described later, takes the electric potential (■) at the connection point between both 3 and 4 as an amount of electricity corresponding to the temperature difference between the indoor temperature and the set temperature.
(G) It is formed so that it can be input to the input terminal.

On the other hand, the first comparator circuit B connects two constant resistors R1 and R2 in series and connects them to a DC power supply, and uses the potential (7) at the series connection point as the operating reference potential, and uses the electrical quantity (2) corresponding to the temperature difference as the operating reference potential (7). 8 and a comparator 6 to which this operating reference potential 7 is input to the (-) input terminal.
The potentials VX and VY are compared, and Vx
> vY, the comparator 6 outputs a high level output, and at the same time lowers the potential ■7 to a slightly lower value, so that V x < V
When the voltage reaches y, the comparator 6 outputs a low level output and at the same time operates to return the potential 7 to its original value.

Therefore, as is clear from the room temperature progression diagram in FIG. 3, the stop temperature point T.

FF and a starting temperature point T with a certain temperature difference with respect to it.
.

N, the room temperature T and the stop temperature point T.

A start command (high level output) is issued by comparing the FF and the room temperature T and the start temperature point T.

A stop command (low level output) is issued by comparing the temperature with N, and the indoor temperature T reaches the stop temperature point T.

After passing FF, a stop command is issued instead of a start command, and the indoor temperature T becomes the start temperature point T.

When N is exceeded, the first comparator circuit B operates so as to issue a start command instead of a stop command.

Next, the compressor control circuit C connects the coil of the operating relay MR1 and the transistor Q1 in series to communicate with the DC power supply, and also connects the output terminal of the comparator 6 and the base of the transistor Q1. 1 A stop command from comparison circuit B makes transistor Q1 non-conductive and deenergizes running relay MR1, while a start command makes transistor Q1 conductive and energizes running relay MR1. .

On the other hand, the second comparison circuit connects two constant resistors R3 and R4 in series and connects them to a DC power supply, and uses the potential 2 at the series connection point as the display reference potential for the temperature detection circuit A.
a resistance circuit section for comparison with a temperature difference equivalent potential Vx;
It is formed of a comparator 8 to which both the potentials Vx and Vz are input to ←) input terminals and (+) input terminals, and when the potentials Vx and Vz are compared and Vz>Vx, the comparator 8 At the same time as outputting a high-level output, the potential 2 is made slightly higher, and when V z < V x, the output is output at the level of Mr. Lee, and at the same time, the electric potential 2 is returned to its original value.

It should be noted that, as a matter of course, the potential Vz is set to be higher in the air conditioner and lower in the heater than the potential Vy, and this set value is converted into a temperature by a certain slight temperature difference, for example, from the set temperature. Resistor R3 is set at the time of design so that the temperature is +0.5℃ for air conditioners and -0.5℃ for heating.
, R4 are selected in advance.

As shown in FIG. 3, this second comparator circuit sets the light-off temperature point T'OFF and the light-on temperature point T'oN to both temperature points T of the first comparator circuit B.

FF and TON, and the lighting temperature point T'oN or both temperature points T.

It is set to be between FF and TON, and when the indoor temperature T is between the lighting temperature point T'oN and the lighting temperature point T'oFF, the lighting command (high level) is sent from the comparator 8. output), and outputs a turn-off command (low level output) in other temperature ranges.

Next, the indicator light control circuit E connects the coil of the indicator relay MR2 and the transistor Q2 in series to communicate with the DC power supply, and also connects the output terminal of the comparator 8 and the base of the transistor Q2, A lighting command from the second comparison circuit makes transistor Q2 conductive to energize display relay MR2, while a light-off command deenergizes display relay MR2.

Next, in the power system electric circuit shown in Fig. 1, 9 is a low voltage rectifier unit circuit that generates DC power for the control command system electric circuit, 10 is a compressor electric motor, and 11 is an outdoor fan electric motor. , 12 is an indoor fan electric motor, 13
14 indicates an operation switch, and 14 indicates an indicator light.

The compressor electric motor 10 and the outdoor fan electric motor 11 are energized by the excitation of the operating relay MR1, while the indicator light 14 is configured in a circuit such that it is turned on by the excitation of the indicator relay MR2.

The operation mode of the air conditioner configured as described above will be explained below.

By setting the operation switch 13 to the temperature control notch, the air conditioner receives a control command from the temperature setting circuit 1 and performs automatic temperature control operation to maintain the room temperature at the set temperature.
A starting temperature point T at which the room temperature T is determined by the design conditions of the temperature setting circuit 1.

N and the stop temperature point T0-FF, that is, within the on/off operation range, and the lighting temperature point T10.
In the temperature range between N and the light-off temperature point T'OFF, that is, within a constant temperature difference of, for example, 0.5°C from the set temperature, the above temperature is maintained regardless of whether the air conditioner is running or stopping. The indicator light 14 is turned on in response to a command signal from the temperature display circuit 2, visually indicating to the user that the room is at an appropriate temperature (see FIG. 3).

Therefore, it provides a convenient display for determining whether the indoor temperature is being controlled to an appropriate temperature near the set temperature.
By looking at the lighting time and blinking state of the indicator light 14, it is possible to know whether the room temperature setting is appropriate or not, which is extremely useful for saving power by avoiding uneconomical operation such as excessive cooling.

Also, in the case of an air conditioner that automatically operates with a timer that completely stops temperature control operation after a set time (sleep timer) or a timer that starts temperature control operation (outing timer), check the operating status. It is extremely convenient to use.

As is clear from the above description, the present invention allows the temperature display circuit 2 to easily and constantly display that the temperature of the air-conditioned area is close to the set temperature, so that the air-conditioning operation can be performed properly. It is not only extremely convenient for the user, but also useful in eliminating uneconomical driving such as excessive cooling, which reduces running costs. This is extremely useful for streamlining driving by maintaining controlled driving that gives a sense of comfort.

[Brief explanation of the drawing]

Figures 1 and 2 are electrical circuit diagrams of the control command system and power system of an air conditioner according to an example of the air conditioner of the present invention, and Figure 3 is a progress chart of room temperature fluctuations due to operation of the air conditioner. be. 1... Temperature setting circuit, 2... Temperature display circuit, A... Temperature detection circuit, B... First comparison circuit, C... ...Compressor control circuit, D...
...Second comparison circuit, E...Indicator light control circuit.

Claims (1)

[Claims for Utility Model Registration] A temperature detection circuit A that detects the temperature T of the air-conditioned area and a stop temperature point T. FF and the stop temperature point T. Starting temperature point T having a certain temperature difference with respect to FF. N, and a start command is issued by comparing the temperature T of the air conditioning target area and the stop temperature point T□FF, and the temperature T of the air conditioning target area and the start temperature point T are compared. A stop command is issued by comparing the temperature T with the temperature T of the air-conditioned area to the stop temperature point T. When FF is passed, a stop command is issued instead of a start command, and the temperature T of the air conditioned area becomes the start temperature point T. a first comparator circuit B that issues a start command instead of a stop command when N is exceeded; and a compressor control circuit C that stops the compressor in response to a stop command from the first comparator circuit B and starts in response to a start command. A temperature setting circuit 1 consisting of
The vertical relationship between both N and N is the same temperature point T of the first comparison circuit B. FF and TON are set oppositely, and the lighting temperature point T'oN is set to the above-mentioned stop temperature point T. FF and the starting temperature point T. A temperature display circuit 2 consisting of a second comparison circuit set between N and N, and an indicator light control circuit E that turns off the indicator light 14 in response to a light-off command from the second comparison circuit and lights it in response to a lighting command. An air conditioner characterized by being provided with.