JPS6159128A - Overloading control device for air conditioner - Google Patents

Abstract

PURPOSE:To maintain the cooling capacity and to prevent the deterioration of the freezer oil and refrigerant by controlling the opening and closing of a baffle plate in the room side ventilation passage by an outside temperature thermostat. CONSTITUTION:When operating under normal temperature conditions, a baffle plate 9 tightly contacts a separates a separator plate by the action of a permanent magnet 10 that separates the room side from the outside, and as a result, the drafting resistance of the room side becomes smallest, the maximum airflow volume is obtained, and the necessary cooling capacity is obtained. When operating under high-load temperature conditions where the outside temperature is high, an outside air temperature thermostat 12 reaches to a set temperature to cause an electrical continuity, whereby an electrical current flow in an electromagnet 11 which is mutually repulsive with the permanent magnet 10 to cause the baffle plate 9 to open at a certain angle. As a result, the airflow volume on the room side is reduced, while the speed of the electric motor is increased as the drafting resistance is increased to cause the outside airflow volume to be increased. Since the heat releasing capacity of an outside heat exchanger 4 is increased while the amount ofheat absorption is reduced, the discharge temperature is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device that controls the indoor ventilation resistance of an air conditioner to an appropriate value depending on the load.

Conventional configuration and its problems Conventionally, this type of integrated air conditioner was as shown in Fig. 5.
The refrigerant compressed by the compressor 101 is transferred to the outdoor heat exchanger 1
02, where it is ventilated and cooled by a fan 104 driven by an electric motor 103 to become a supercooled liquid, which is then adiabatically expanded by a capillary tube 105 and becomes a low-pressure, low-temperature two-phase flow to an indoor heat exchanger (not shown). ), and after exchanging heat with indoor air, returns to the compressor 101, and the indoor ventilation resistance is always constant regardless of load fluctuations.

However, in such a structure, under high load,
Since the capacity of the outdoor heat exchanger is required and the outdoor heat exchanger is used in a place where the operating point temperature is high, the temperature of the discharged refrigerant increases and the refrigerating machine oil deteriorates.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, prevents deterioration of refrigerating machine oil during high loads, and also provides sufficient performance even when used under standard temperature conditions indoors and outdoors. The purpose is to

Structure of the Invention In order to achieve this object, the present invention provides a door having a permanent magnet at one end on the indoor side of the indoor/outdoor partition plate of an integrated air conditioner, and a door having a permanent magnet at one end of the indoor/outdoor partition plate corresponding to the permanent magnet. An electromagnet is provided at the position of the board, and an outside temperature thermostat is provided to control the energization and de-energization of the electromagnet.

With this configuration, the indoor ventilation resistance is controlled by opening and closing the resistance plate of the indoor ventilation resistance by opening and closing the switch by the outside temperature thermostat as the outdoor load fluctuates. Maintains cooling capacity and prevents deterioration of refrigerator oil and refrigerant.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is the board of air conditioner A, and this board 1
An indoor/outdoor partition plate 2 that divides the air conditioner A into an indoor side B and an outdoor side C is fixed thereon. 3 is a compressor, 4 is an outdoor heat exchanger, and 5 is an indoor heat exchanger. Further, an electric motor 6 is mounted on the substrate 1, and an indoor fan 7 and an outdoor fan 8 driven by the electric motor 6 are provided to constitute a well-known refrigeration cycle. Furthermore, the indoor/outdoor partition plate 2 is equipped with an overload control device according to the present invention.

Next, the configuration of the overload control device will be explained.

Reference numeral 9 denotes a resistance plate provided on the indoor/outdoor partition plate 2. A permanent magnet 10 is provided on a part of this resistance plate, and an electromagnet 11 is attached to the indoor/outdoor partition plate 2 at a position corresponding to this permanent magnet 10. Further, the electromagnet 11
Outside temperature thermo stand 12 that controls energization and de-energization of
is attached to the outdoor ventilation passage CIl'il of the indoor/outdoor partition plate 2.

Next, the operation of the overload control device in the above configuration will be explained using FIG. 2 and FIG. 3.

First, when operating under standard temperature conditions, the outside temperature thermostat 12 is not energized because it has not reached the set temperature, and no current is passed through the electromagnet 11, and the polarity is repelled by the permanent magnet 1o. Not magnetized. As a result, the permanent magnet 1 attached to one end of the resistance plate 9
o is attracted to the iron core of the electromagnet 11. Therefore, the resistance plate 9 is in close contact with the indoor/outdoor partition plate 2. Accordingly, the ventilation resistance on the indoor side is minimized, the maximum air volume is obtained, and the necessary cooling capacity is obtained under standard temperature conditions.

Next, when the operation is performed under a high load temperature condition with a high outside temperature, the outside temperature thermostat 12 reaches the set temperature and becomes energized, and a current is passed through the electromagnet 11, repelling it from the permanent magnet 10. Magnetize in polarity. For this reason,
The permanent magnet 10 and the electromagnet 11 attached to one end of the resistance plate 9 repel each other. Along with that,
The resistance plate 9 opens at a certain angle from the indoor/outdoor partition plate 2. As a result of this action, the ventilation resistance on the indoor side increases, and the indoor air volume decreases.As the ventilation resistance increases, the rotation speed of the electric motor increases, and the outdoor air volume increases, so the heat dissipation capacity of the outdoor heat exchanger increases. is increasing and the amount of heat absorbed is decreasing, so the discharge temperature is lowered.

Therefore, overload control using this indoor ventilation resistance lowers the discharge temperature during high loads to prevent deterioration of the refrigerating machine oil, and in addition, provides sufficient cooling capacity even when used under standard temperature conditions.

Although this embodiment uses a permanent magnet and an electromagnet for the drive device, the same effect can be obtained even if a solenoid is used.

Effects of the Invention As is clear from the above embodiments, the present invention uses an overload control device that uses indoor ventilation resistance to lower the discharge temperature during high loads to prevent deterioration of refrigerating machine oil and refrigerant. It has the effect of providing sufficient cooling capacity even when used under certain conditions.

[Brief explanation of the drawing]

FIG. 1 is a top view of an air conditioner equipped with an overload control device showing an embodiment of the present invention with the outer box and indoor top plate removed;
Fig. 2 is a detailed sectional view showing the behavior of the overload control device under normal load, Fig. 3 is a detailed sectional view showing the behavior during overload, and Fig. 4 is a perspective view of the overload control device. FIG. 5 is a perspective view of a conventional air conditioner. 2...Indoor/outdoor partition plate, 9...Resistance plate, 10
...Permanent magnet, 11...Electromagnet. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3? Figure 4

Claims (1)

[Claims] The integrated air conditioner has an openable and closable resistance plate on the indoor side of the indoor/outdoor partition plate, is provided with a drive device that opens and closes using an electromagnet, and is further equipped with an outside temperature thermostat on the outdoor side of the indoor/outdoor partition plate. Overload control device for conditioner.