JPS6324230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an air conditioner in which gas is sealed in a diaphragm and contacts are opened and closed by expanding and contracting the diaphragm due to changes in ambient temperature to control the operation of a compressor or blower. This invention relates to a temperature control device.

Conventionally, temperature control devices for air conditioners have been either bimetal type temperature controllers that open and close contacts by the displacement of the bimetal due to changes in ambient temperature, or diaphragm type temperature controllers that open and close contacts by the displacement of a diaphragm that is filled with gas and expands and contracts. temperature controllers are known.

Although the conventional temperature regulator described above is inexpensive, it has the following problems.

In other words, when the air conditioner and the temperature controller for the air conditioner are cold, such as in the early morning, the room temperature suddenly rises and the air conditioner's operation switch is turned on. However, the air conditioner may not start operating because the temperature around the temperature controller is low.

Conventionally, in order to solve this problem, as shown in Fig. 1, resistance heating elements c are installed around the thermostat body a at a predetermined interval, and the resistance heating elements c are connected in parallel with the contacts of the thermostat body a. It is known that the compressor 2d of the air conditioner is connected in series with the blower e through a parallel circuit consisting of the contacts and the resistance heating element c.

As a result, when the air conditioner main body and the air conditioner temperature controller main body a are in a cold state, such as in the morning, if the indoor temperature suddenly rises, the operation switch b of the air conditioner can be turned off. When turned ON, a voltage is applied to the resistance heating element c and heats the thermostat body a. As a result, the contact of thermostat a turns ON and the air conditioner is operated.

However, with this structure, when the air conditioner stops operating due to a decrease in the air load and the contact of thermostat a turns OFF, the indoor heat exchanger of the air conditioner is cold, so the radiant cold heat is used to heat the thermostat. There was a problem in that even if the heat-sensitive cylinder f of the thermostat a was cooled and the indoor temperature rose, the contacts of the thermostat a remained open and the air conditioner did not resume operation in accordance with the change in air temperature.

Furthermore, in order to solve this problem, as shown in Fig. 1, a resistance heating element g is attached to the heat sensitive tube f of the thermostat a, and this resistance heating element g is connected in parallel with the contact of the thermostat a. The parallel circuit of the contact and the resistance heating element g may be connected in series with the compressor d or the blower e of the air conditioner.

As a result, the indoor load decreases and the contact of thermostat a turns OFF, and even if the air conditioner stops operating, voltage is applied to the resistance heating element c, which heats the thermosensitive cylinder f and turns off the contact of thermostat a. turns ON and the air conditioner resumes operation.

However, in this structure, the thermostat body a
It is necessary to provide two resistance heating elements c and g, which increases the cost and limits the installation space.

Also, of course, sufficient performance cannot be obtained by providing only one of the resistance heating elements.

One of the objects of the present invention is to solve the above-mentioned conventional problems and to enable inexpensive and reliable temperature control.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 and 4 of the accompanying drawings.

In the figure, reference numeral 1 denotes a diaphragm type temperature regulator which is fixed to a power supply board 3 with screws 2 via metal fittings. This temperature regulator 1 has a diaphragm 4 sealed with gas, and the diaphragm 4 and the temperature sensing section 5 are connected by a capillary reach tube 6. The structure of this diaphragm type temperature regulator 1 itself is conventionally well known, and therefore a description thereof will be omitted.

One end of the diaphragm 4 is exposed to the outside of the temperature controller 1, and a screw is installed on top of the exposed diaphragm 4 so that the center part is in tight contact with the exposed end of the diaphragm 4. 7,
The mounting bracket 8 is fixed to the power supply board 3 by using two of them. A heating resistor 10 whose outer periphery is covered with ceramic cement 9 is inserted into the mounting bracket 8 by a fixing bracket 12 that pairs with the mounting bracket 8 through a protective silicone rubber sheet 11, and is secured by a screw 13. installed.
Therefore, since the heating resistor 10 is clamped and fixed by the silicone rubber sheet 11, the mounting fittings 8, and the fixing fittings 12, it will not be damaged even if it is tightened with a large torque.

Further, since the sheet 11 is not provided between the diaphragm 4 and the heating resistor 10, the metals contact each other between the heating resistor 10 and the diaphragm 4, and heat transfer is performed very efficiently. The sheet 11 is made of silicone rubber, and silicone rubber has heat insulating properties as is well known, and by changing the area thickness of the sheet 11, the amount of heat dissipated from the heating resistor 10 can be changed.

In the above configuration, when the air conditioner is operated and the indoor load decreases, the contact of temperature controller 1 turns OFF.
To explain the case when the temperature controller 1 is activated, since the temperature controller 1 and the heating resistor 10 are connected in parallel as shown in FIG.
When it is ON, only a small divided voltage is applied to the heating resistor 10, but when the contact of the temperature regulator 1 turns OFF, a large voltage is applied to the heating resistor 10. be done. Therefore, the heating resistor 10 generates heat, which warms the cement 9 around the outer periphery of the resistor 10, which in turn warms the mounting fittings 8 and the fixing fittings 12. This mounting bracket 8 and the diaphragm 4 of the temperature controller 1
Since they are in close contact with each other, the diaphragm 4 is heated, the gas inside the diaphragm 4 expands, and the contact turns ON due to the pressure.

Therefore, even if the temperature inside the power supply board 1 is lower than room temperature, the contact of the temperature regulator 1 turns ON after a certain period of time.

Also, after the contact of temperature controller 1 turns OFF,
Temperature controller 1 using radiant cooling or cold air
Even if the temperature sensing portion 5 of the temperature sensor 5 is cooled down, the contact of the temperature regulator 1 turns ON after a certain period of time.

The amount of heat generated by this heating resistor 10 can be adjusted by selecting the resistance value, and by changing the shape of the mounting bracket 8 or by changing the area thickness of the sheet 11. The amount of heat transferred to can be changed. Further, the amount of heat transferred to the diaphragm 4 can also be changed by changing the resistance value of the heating resistor 10.

Furthermore, by changing the amount of heat transfer, the temperature regulator 1 can be operated not only by the heat generated by the heating resistor 10 but also by a change in the indoor load.

As is clear from the above embodiments, the present invention seals the diaphragm of a temperature controller that opens and closes the electrical contacts of a compressor or blower, and utilizes the displacement of the diaphragm when the ambient temperature changes. Since the heat generating resistor is attached to the diaphragm through the metal fittings, the heat from the heat generating resistor can be transferred to the diaphragm very efficiently.This allows the temperature to be adjusted even if the temperature controller itself or its surroundings are cooled. If the contact of the thermostat turns OFF, the contact of the thermostat will turn ON after a certain period of time, ensuring reliable cooling operation.Moreover, it requires less installation space, and can be used to adjust the indoor load inexpensively and easily. This has the effect of improving air conditioning.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional temperature control device;
Fig. 2 is an electric circuit diagram of an air conditioner using the same temperature control device, Fig. 3 is a perspective view of the temperature control device according to an embodiment of the present invention, and Fig. 4 is a perspective view of the heating resistor section in the same temperature control device. Figure 5 is A of Figure 4.
- It is a sectional view taken along the A line. 1...Temperature controller, 4...Diaphragm, 8...
...Mounting metal fittings, 10...Heating resistor, 12...Fixing metal fittings.

Claims (1)

[Claims] 1. An electrical resistor is attached via a thermally conductive fixture that is tightly attached to the diaphragm part of a diaphragm-type temperature regulator that expands and contracts according to temperature changes and opens and closes the contacts. An air conditioner in which an upper fitting is provided on the side via an insulating elastic body, an electrical resistor is brought into close contact with the fitting by the fitting and the upper fitting, and this heating resistor is connected in parallel with the contact point. Machine temperature control device.