JPS5938675Y2 - Outside temperature detection device for air conditioners - Google Patents

Description

[Detailed description of the invention] This invention is suitable for air conditioners such as so-called room air conditioners, and saves space when installed in the air conditioner, is easy to attach and remove,
The present invention relates to an outside temperature detection device for an air conditioner that has good compatibility and sensor responsiveness to changes in outside temperature.

Recently, there has been a demand for air conditioners such as room air conditioners to automatically slide the indoor temperature setting based on outside temperature detection in order to save electricity and improve health.

This idea was developed with these points in mind, and it saves space when installing an air conditioner, is easy to attach and detach, has good compatibility, and has good responsiveness of the sensor to changes in outside temperature, and is economical to set indoor temperature. The purpose of the present invention is to provide an outside temperature detection device for an air conditioner that can automatically slide the outside temperature.

Embodiments of the outside temperature detection device for air conditioners of this invention will be described below with reference to two drawings.

FIG. 1 is an electrical circuit diagram of a separate type air conditioner capable of detecting outside temperature, to which the outside temperature detection device for air conditioners of this invention is applied.

In Fig. 1, the left side of the center part (indoor, outside marked part 9) is the indoor side, and the right side is the outdoor side. 1 in the figure is the commercial power source (hereinafter simply referred to as the power source), and its two poles are An indoor blower motor 2 is connected between them.

Further, a control device 3 is connected between both poles of the power source 1.

A room temperature sensor 4, a room temperature setting device 5, and a coil 6a of a main switch 6 are connected to the control electrode 3.

The switching contact 6b of the main switch 6 has a movable contact and two fixed contacts A and B.

The movable contact is connected to a terminal 9al of the indoor/outdoor wiring section 9, and the fixed contact A is connected to one electrode I of the power source 1.

Further, the fixed contact B is connected to the other electrode of the power supply 1 via the current-to-temperature conversion circuit 7b of the indoor temperature detection circuit 7 and the DC power supply 8.

The indoor temperature detection circuit 7 also has a temperature reading circuit 7 electrically insulated from the current-to-temperature conversion circuit 7b, and this temperature reading circuit 7a is connected to the control device 3.

The configuration described above is for the indoor side, but next, the configuration for the outdoor side will be explained.

The outdoor side is connected to the indoor side via an indoor/outdoor wiring section 9, and a wiring 9c is provided between each of the two terminals 9a and 9b.

A series circuit of a coil 10a of an auxiliary switch 10 and a capacitor 11 is connected between the two terminals 9b.

Further, the auxiliary switch 10 has a switching contact 1ob.

The switching contact 10b has two fixed contacts A and B and a movable contact, and the movable contact is connected to the terminal 9b of the indoor/outdoor wiring section 9.

Fixed contacts A are connected to the outdoor blower motor 13 and compressor motor 14
It is connected to the terminal 9b (bottom side of the figure) of the indoor/outdoor wiring section 9 via a parallel circuit with the terminal 9b.

Between this terminal 9b and fixed contact B, there is an outside temperature detection device 12.
is connected.

Next, the operation of the electric circuit diagram of the separate air conditioner shown in FIG. 1 will be explained.

Now, when the movable contact of the switching contact 6b of the main switch 6 is in the illustrated state, that is, in the state where it is in contact with the fixed contact Aj, the movable contact of the switching contact 10b of the auxiliary switch 10 is in contact with the fixed contact A.
(the impedance of the coil 1'Oa of the auxiliary switch 10 is much higher than the impedance of the capacitor 11).

In this state, the compressor motor 14 has both switching contacts 6b, 1
Electricity is supplied from power supply 1 through 0b, and air conditioning operation is performed.

On the other hand, when the movable contact of the switching contact 6b of the main switch 6 switches to the fixed contact B, the low voltage DC voltage of the DC power supply 8 is transferred to the indoor temperature detection circuit 7b and the switching contact 6b.

The coil 10a of the auxiliary switch 10 is passed through the indoor/outdoor wiring section 9.
is applied to the capacitor 11, and this coil 10a is demagnetized.

As a result, the movable contact of the switching contact 10b is on the fixed contact B side l.
The outside air temperature detection device 12 and the indoor/outdoor wiring section 9 - DC power supply 8 - Current vs. temperature reading circuit 7b - Switching contact 6b -
Indoor/outdoor wiring section 9 - switching contact 10b - outside temperature detection device 12
A closed circuit is formed.

Therefore, the current-to-temperature conversion circuit 7b detects a current corresponding to the resistance of the outside temperature detection device 12, and can convert this into temperature.

This is because once charging of the capacitor 11 is completed, the DC resistance can be considered to be almost infinite.

In this way, in the electrical circuit diagram of the separate air conditioner shown in Figure 1,
If outside temperature detection is required, the switching contact 6b of the main switch 6 may be broken (the movable contact is placed on the fixed contact B side) for a short time even during air conditioning operation.

Then, the detection data of the current versus temperature detection circuit 7b is electrically isolated and read and input to the control device 3 by the temperature reading circuit 7a.

In the control device 3, necessary processing is performed and outside temperature sliding control is realized.

FIG. 2 is a circuit diagram of the outside temperature detection device for an air conditioner according to this invention, and shows the internal electric circuit of the outside air m button device 12 in FIG.

In FIG. 2, a temperature sensor 12a and a resistor 12b are connected in series, and one end of the temperature sensor 12a is connected to a terminal 12f.
(This is connected.

The terminal 12f is connected to the fixed contact B of the switching contact 10b in FIG.

A temperature sensor 12a is connected in parallel with a capacitor 12c and a surge absorbing element 12d, and a series circuit of the temperature sensor 12a and a resistor 12b is connected in parallel with a surge absorbing element 12e.

By the way, the outside temperature slide control mentioned above is normally performed when the outside temperature is 30.
℃, so select the value of the resistor 12b (variable resistor is also possible), and around this temperature, the temperature sensor 12a (
Absorbs variations in resistance of thermistors, etc.).

The surge absorbing element 12e is for absorbing a relatively high surge voltage superimposed on the power supply 1, and its main focus is on surge energy withstand capacity.On the other hand, the capacitor 12c and the surge absorbing element 1
2d is selected with a focus on steep surge absorption.

These double surge absorbing elements, that is, the surge absorbing element 12e, the surge absorbing element 12d, and the capacitor 12c (Thus, the temperature sensor 12a can be safely connected to the line of the power source 1.

FIG. 3 is a concrete configuration diagram of the outside temperature detection device for air conditioners of this invention shown in FIG. 2, FIG.
The figure is a sectional view.

In this Figure 3, a base board 1 such as a printed circuit board is shown.
A temperature sensor 12a, a resistor 12b, a capacitor 12c, and surge absorbing elements 12d and 12e are mounted on the terminal 2g, and a conductive wire is connected to the terminal 12f to lead out to the outside.

Further, on the base substrate 12g, the vicinity of its periphery is completely sealed with a sealing material 12 such as vinyl chloride, and the 42 openings are completely sealed with a high frequency seal or the like to form an integral seal.

Note that 12i is a temperature sensor 12a on the base substrate 12g.
This chamber is formed to surround the base substrate 12g, thereby reducing the thermal influence of the base substrate 12g and improving the ability of the temperature sensor 12a to follow changes in outside temperature.

FIG. 4a is a plan view showing a second embodiment of the outside temperature detecting device for an air conditioner according to the present invention, and FIG. 4 is a sectional view thereof.

In the case of this second embodiment, the temperature sensor 12a is isolated from the base substrate 12g by a lead wire, and the sealing material 1
2k is made of vinyl chloride and has a structure in which it is integrally sealed with the base substrate 12g, and the 42 openings are sealed.

In the case of FIGS. 4a and 4s, the temperature sensor 12a comes into contact with the outside air through the sealing material 12k, and therefore has the advantage of quick response.

Note that 12J is a through hole for attaching to the air conditioner, and using this through hole 12j, it can be easily attached with a wire or the like. It may be provided in the section.

FIG. 5 is a circuit diagram showing a third embodiment of the outside temperature detection device for an air conditioner of this invention.

In the case of this Fig. 5, the diode 12h is connected to the temperature sensor 12.
A and the resistor 12b/I are connected in series, and a Zener diode 12d is used in place of the surge absorbing element 12cH in FIGS. 2 to 4.
A surge absorbing element 12e is connected in parallel to a series circuit of a temperature sensor 12a, a resistor 12b, and a diode 12h.

In this way, by using the diode 12h,
A unidirectional element such as the Zener diode 12d can be used as the surge absorbing element on the low voltage side, and there is an advantage that the breakdown voltage can be selected with relative accuracy.

FIG. 6a is a plan view showing a fourth embodiment of the outside temperature detecting device for an air conditioner according to the present invention, and FIG. 6 is a sectional view thereof.

In the case of this fourth embodiment, a rigid terminal 1M is provided, and by inserting this rigid terminal 11' into the other party, there is an advantage that the outside temperature detection device 12 can be fixed inside the air conditioner. .

In the above configuration, an example is given in which the electric circuit elements are mounted using a printed circuit board as the base substrate 12g, but it is also possible to mount chip-shaped components on a ceramic substrate.

Furthermore, it is also possible to integrally mold the groove with epoxy resin or the like as an integrally sealed groove structure.

As detailed above, according to the outside temperature detection device for air conditioners devised by &Kiko, the temperature sensor and other electric circuit elements are integrated on the base board and have a sealed structure, minimizing the installation space. In addition, it is possible to adjust sensor variations on a device-by-device basis, and even in the unlikely event of a failure, compatibility can be maintained.

In addition, it is easy to attach and detach, improving workability, and because of its integrally sealed structure, it has excellent weather resistance, and it is also possible to improve the responsiveness of the temperature sensor to changes in the outside air.

In addition, two types of surge absorbing elements are disposed near the temperature sensor, which provides excellent effects such as improving the ability to prevent damage to the temperature sensor due to surges when connected to a commercial power line.

[Brief explanation of drawings]

Figure 1 is an electrical circuit diagram of a separate air conditioner using the outside temperature detection device for air conditioners of this invention, Figure 2 is a circuit diagram of an embodiment of the outside temperature detection device for air conditioners of this invention, and Figure 3 Figure a is the second
A plan view showing the configuration of the outside temperature detection device for air conditioners shown in Figure 3.
The figure is a sectional view of FIG. 3a, and FIG. 4a is a plan view showing the configuration of a second embodiment of the outside temperature detection device for an air conditioner of this invention.
FIG. 4 is a sectional view of FIG. 4a, FIG. 5 is a circuit diagram showing a third embodiment of the outside temperature detection device for an air conditioner of this invention, and FIG.
Figure a is a plan view showing the configuration of a fourth embodiment of the outside temperature detection device for an air conditioner of this invention, and Figure 6 is a sectional view of Figure 6a. 1...Power source, 2...Indoor blower motor, 3...Control device, 4...Room temperature sensor, 5...Temperature setting device , 6... Main switch, 7... Indoor temperature detection circuit, 8...
DC power supply, 9...Indoor/outdoor wiring section, 10...
...Auxiliary switch, 11, 12c...Capacitor, 12...Outside temperature detection device, 12a...
・Temperature sensor, 12b...Resistance, 12d, 12
e...Surge absorption contin f, 12f...
...Terminal, 12g...Base board, 12k...
... Sealing material, 12i... Chamber, 12j...
...Through hole, 12h...Diode, 12
1... Rigid terminal, 13... Outdoor blower motor, 14... Compressor motor. Note that the numbers indicate the same or equivalent parts. Same symbol in the figure

Claims (4)

[Scope of utility model registration request] (1) A temperature sensor for detecting outside temperature arranged on the base board; a first surge absorption element connected in parallel to this temperature sensor and arranged on the base board to absorb steep surge voltage; , a second surge absorption element that is connected in parallel to the temperature sensor and is disposed on the base board and absorbs a high surge voltage superimposed on the commercial power supply; An outside temperature detection device for an air conditioner, comprising a sealing means that is integrally sealed with a second surge absorbing element. (2) The air conditioner according to claim 1, wherein the temperature sensor is provided with means for generating a difference in heat transfer rate between the first and second surge absorbing elements and the outside air. Aircraft outside temperature detection device. (3) Utility model registration claim 1 or 2, characterized in that part of the sealing means is provided with a through hole for attaching an air conditioner to the extent that the sealing function is not impaired. Outside temperature detection device for air conditioners. (4) The outside temperature detection device for an air conditioner according to any one of claims 1 to 3 of the utility model registration claim, characterized in that a rigid terminal is provided on the base board.