JPS5829798Y2 - 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 for 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 controlled to a comfortable state, the user has no choice but to rely on a separately installed thermometer or to judge by feeling. The inconvenience that often occurs when the controlled operation is in an uncomfortable state such as excessive cold for the user cannot be avoided.

The present invention focuses on the current situation and aims to improve it, especially when the actual measured temperature of the air-conditioned area has a certain slight temperature difference from the set temperature, and the predetermined comfortable temperature This device facilitates visual judgment by the user by lighting up an indicator light when the temperature is within the range, and includes a first temperature detection circuit that detects the temperature of the area to be air conditioned, a stop temperature point, and the stop temperature point. A starting temperature point having a constant temperature difference with respect to the temperature point, and a starting command is issued by comparing the temperature of the air conditioning target area and the stopping temperature point, and the temperature of the air conditioning target area and the starting temperature point are compared. When the temperature of the air conditioned area exceeds the above-mentioned stop temperature point, a stop command is issued instead of the start command, and when the temperature of the air conditioned area exceeds the start temperature point, a stop command is issued instead of the start temperature point. A temperature setting circuit is provided, which includes a first comparison circuit that issues a start command, and 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 temperature detection circuit that detects temperature;
Consisting of a comparison circuit, a fourth comparison circuit, and an AND circuit, the third
an upper limit temperature determined by a comparison circuit to set an upper limit of a comfort temperature range whose temperature range is greater than the temperature difference between the surface temperature points of the first comparison circuit; and an upper limit temperature determined by a fourth comparison circuit to set the upper limit of the comfort temperature range. a lower temperature limit that sets the lower limit of the range;
A comfort temperature range setting circuit is provided which compares the temperature of the air-conditioned area and issues a release command when the temperature of the air-conditioned area is within the comfortable temperature range, and issues a prohibition command when it is outside the comfortable temperature range. , the vertical relationship between the turn-off temperature point and the turn-on temperature point is set to be opposite to the same temperature point of the first comparison circuit, and the turn-on temperature point is set between the stop temperature point and the start temperature point. A second comparison circuit, a command from the second comparison circuit and a command from the comfortable temperature range setting circuit are manually input, and when the former command is a lighting command and the latter command is a cancellation command, a lighting command is issued; In other cases, the temperature display circuit includes an AND circuit that issues a light-off command, and an indicator light control circuit that turns off the indicator light in response to the light-off command and turns on the indicator light in response to the lighting command. By doing so, we were able to achieve our intended purpose.

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

FIG. 1 shows an electric circuit of a control command system of an air conditioner according to the present invention, in which 1 is a temperature setting circuit, 2a is a temperature display circuit, and 2b is a temperature display circuit.
is the comfort temperature range setting circuit.

The temperature setting circuit 1 includes a first temperature detection circuit A, a first comparison circuit B, and a compressor control circuit C, while the temperature display circuit 2a includes a second comparison circuit and an indicator light control circuit E. The comfortable temperature range setting circuit 2b is composed of a second temperature detection circuit F, a third comparison circuit G, a fourth comparison circuit H, and an AND circuit Q3.

The first 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 to convert the set temperature into an amount of electricity. They are connected in series and connected to a DC power source, and the potential 8 at the connection point between both 3 and 4 is applied to the (1) input terminal of a comparator 6, which will be described later, as an amount of electricity corresponding to the temperature difference between the indoor temperature and the set temperature. It is formed for input.

On the other hand, the first comparator circuit B connects two constant resistors R1 and R2 in series and connects them to a series power supply, and uses the potential (7) at the series connection point as the operating reference potential, and uses the electrical quantity (7) corresponding to the temperature difference as the operating reference potential (7). 8 and a comparator 6 to which this operating reference potential ■A is input to the (→input terminal), compares the potentials Vx and Vy, and determines that Vx>
When Vy, the comparator 6 outputs a high level and at the same time lowers the potential ■7 to a slightly lower value, and when Vx>Vy, the comparator 6 outputs a low level and at the same time returns the potential ■7 to its original value. It operates so that it can be returned to.

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.

The first comparator circuit B operates so that when FF is exceeded, a stop command is issued instead of the start command, and when the indoor temperature T exceeds the start temperature point TON, a start command is issued instead of the 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 to de-energize operating relay MR1, while a start command causes transistor Q1 to conduct and energizes operating 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 v2 at the series connection point as the display reference potential of the temperature detection circuit A.
A resistor circuit section for comparison with the temperature difference equivalent potential ■8,
It is formed of a comparator 8 to which the surface potentials Vx and Vz are inputted to (-) input terminals and (+) input terminals, and compares the potentials Vx and Vz and performs a comparison when Vz>Vx. At the same time as outputting a high level output from the device 8, the potential ■2
It operates so as to raise the voltage slightly and output a low level output where Vz<Vx, and at the same time return the potential (2) 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 converts the light-off temperature point 'r'OFF and the light-on temperature point T'ON to both temperature points TOFF and TON of the first comparator circuit B, which are in the opposite vertical relationship. and the lighting temperature point T'ON is at both temperature points T.

It is set so that it is between FF and TON, and the indoor temperature T is between the lighting temperature point T'ON and the lighting temperature point T'ON.
'oFF, the comparator 8 issues a lighting command (high level output), and in other temperature ranges it issues a lighting command (high level output).
low level output).

Next, the indicator light control circuit E connects the coil of the indicator relay MR2 and the transistor Q2 that constitutes an AND circuit in series, connects it to a DC power supply, and also connects the output terminal of the comparator 8 and constitutes an AND circuit. The collector of the transistor Q3, which will be described later, is connected to the base of the transistor Q2, and the transistor Q3 is non-conductive with respect to the lighting command from the second comparison circuit (this is a state in which a cancellation command is issued, which will be described later). While transistor Q2 is made conductive and display relay MR2 is energized by the logical product of At least one of the lights-off commands operates to de-energize the display relay MR2.

Next, the second temperature detection circuit F is constructed by connecting a negative characteristic thermistor 17, an adjustment resistor 18, and a semi-fixed resistor 19 in series, which detect the temperature of the air-conditioned area (indoor) as an amount of electrical displacement, and connecting them to a DC power supply. , the potential V'X of the circuit consisting of both resistors 18 and 19 in series, which changes depending on the room temperature, is expressed as the electrical quantity corresponding to the difference between the room temperature and the comfortable temperature setting (of the comparator 16, which will be described later).
1) It is formed to be input to the input terminal.

On the other hand, the third comparator circuit G connects two constant resistors R5 and R6 in series and connects them to a DC power supply, so that the potential V'Y at the series connection point is set as the comfortable temperature upper limit reference potential and the potential V'X and this potential V'Y.
is formed from a comparator 16 to which the potential V'X is input to the (1) input terminal, respectively, and the potentials v'x and v'y are compared, and V 'x >■1 When the comparator 16 outputs a high level output at the same time, the potential V
'y is lowered slightly, and when V'x <V'y, the comparator 16 outputs a low level output and at the same time operates to return the potential V'Y to its original value.

This third comparator circuit G can be operated at both temperature points T O of the first comparator circuit B by appropriately setting the values of resistors R5 and R6.
The upper limit temperature TU (this is the starting temperature point T
.

When the indoor temperature T exceeds the upper limit temperature TU during the upper limit process, the comparator 16 converts the low level output to a high level output. When the voltage drops too low, it operates to convert the high level output to Mr. Lee's level output.

Next, the transistor Q3 as an AND circuit has its collector connected to the base of the transistor Q2 and the output terminal of the comparator 8, its base connected to the output terminal of the comparator 16, and the output terminal of the comparator 21 described later. The comparators 16 and 16 are connected to each other through a diode, and their emitters are grounded, and when the outputs of both comparators 16 and 21 are both at a low level, the transistor Q2 becomes non-conductive.

On the other hand, the fourth comparator circuit H connects two constant resistors R7 and R8 in series and connects them to a DC power supply, thereby setting the potential at the series connection point as the comfortable temperature lower limit reference potential at the potential V'x
and a comparator 21 to which the potential of the series connection point is input to the (g) input terminal, and the potential V'x is input to the (-) input terminal, respectively. It operates in the same way as the second comparison circuit, and by appropriately selecting the values of resistors R7 and R8, the lower limit temperature TL (this is the stop temperature point T) sets the lower limit of the comfortable temperature range.

When the indoor temperature T becomes lower than the lower limit temperature TL during the falling process, the comparator 21 changes the low level output to a high level output, and when it exceeds the lower limit temperature TL during the rising process, the comparator 21 changes the low level output to the high level output. Operates to convert level output to low level output.

The comfortable temperature range setting circuit 2b having such a structure compares the upper limit temperature TU and the lower limit temperature TL with the room temperature T.
When the room temperature is within the temperature range between the upper limit temperature TU and the lower limit temperature T + -, that is, within the comfortable temperature range, the transistor Q3 becomes non-conductive and issues a cancellation command to the indicator light control circuit E. When the signal is out of range, transistor Q3 becomes conductive and operates to issue an inhibit command.

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, 11 is an outdoor fan electric motor, 12 is an electric motor for the indoor fan; 1
Reference numeral 3 indicates an operation switch, and reference numeral 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 TON and a stopping temperature point T, where the room temperature T is determined by the design conditions of the temperature setting circuit 1.

FF, that is, within the on/off operating temperature range, and the lighting temperature point T'ON and the lighting temperature point T'OF.
In other words, when the temperature is within a certain temperature difference of, for example, 0.5°C from the set temperature, and the temperature is within a predetermined comfortable temperature range, the air conditioner cannot be operated. or the temperature display circuit 2 regardless of whether it is stopped or not.
The indicator light 14 lights up in response to a command signal from the controller, visually indicating to the user that the room is at an appropriate and comfortable temperature.

The room temperature fluctuation state at this time is as shown in FIG.

Therefore, since the display is convenient for determining whether the indoor temperature is controlled to an appropriate temperature close to the set temperature and a comfortable temperature state, the room temperature setting is appropriate by looking at the lighting time and blinking state of the indicator light 14. It is extremely useful for saving electricity by avoiding uneconomical operation such as excessive cooling.

Also, in the case of an air conditioner that operates automatically using 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 will be extremely convenient.

As is clear from the above description, the temperature display circuit 2a of the present invention indicates that the temperature of the air conditioning target area is close to the set temperature and that the temperature is within the comfortable temperature range.
By providing a comfortable temperature range setting circuit 2b, the display can be easily and constantly displayed, and the user can make a rational visual judgment as to whether the air conditioning operation is appropriate without relying on intuition. Not only is it extremely convenient, but it also makes it possible to eliminate uneconomical driving caused by excessive cooling, which is extremely useful in reducing running costs and streamlining driving by maintaining controlled driving that gives a sense of comfort. It is.

[Brief explanation of drawings]

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, 2a...Temperature display circuit, 2b...Comfortable temperature range setting circuit, A.
...First temperature detection circuit, B...First comparison circuit, C...Compressor control circuit, D...
Second comparison circuit, E... Indicator light control circuit, F...
...Second temperature detection circuit, G...Third comparison circuit, H...Fourth comparison circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A first temperature detection circuit A that detects the temperature T of the air-conditioned area;
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, a start command is issued by comparing the temperature T of the air conditioning target area and the stop temperature point TOFF, and the temperature T of the air conditioning target area and the start temperature point TOFF are issued. 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 comparison 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 comparison circuit B and starts it in response to a start command. A second temperature detection circuit F for detecting the temperature T of the air-conditioned area is provided.
, third comparison circuit G, fourth comparison circuit H, and AND circuit Q3
The temperature range is determined by the third comparator circuit G, and the temperature range is between both temperature points T of the first comparator circuit B. The upper limit temperature Tu that sets the upper limit of the comfortable temperature range that is larger than the temperature difference between N and TOFF, the lower limit temperature TL that is determined by the fourth comparison circuit H and sets the lower limit of the comfortable temperature range, and the lower limit temperature TL of the air conditioning target area. A comfortable temperature range setting circuit 2b is provided, which compares the temperature T with the temperature T and issues a release command when the temperature T of the air-conditioned area is within the comfortable temperature range, and issues a prohibition command when it is outside the comfortable temperature range; Lights out temperature point 'r”O
The vertical relationship between FF and the lighting temperature point T'ON is determined by comparing both temperature points T of the first comparison circuit B. Set it opposite to FF and TON, and set the lighting temperature point 'r
"ON" is set between the above-mentioned stop temperature point T.FF and the above-mentioned starting temperature point T.A second comparison circuit set between FF and the above-mentioned start-up temperature point T. is input, and when the former command is a lighting command and the latter command is a release command, a lighting command is issued, and in other cases, an AND circuit Q2 is used as an element to issue a lighting-off command, and the display is displayed according to the lighting-off command. An air conditioner characterized by being provided with a temperature display circuit 2a comprising an indicator light control circuit E that turns off the light 14 and turns on the indicator light 14 in response to a lighting command.