JPS5835937Y2 - Room air conditioner heating device - Google Patents

Description

[Detailed Description of the Invention] Field of Application of the Invention The present invention relates to a heating device for a room air conditioner.

Due to the characteristics of a positive temperature coefficient thermistor heater used in a heating device for a conventional room air conditioner, a starting current that is two to three times the current during steady operation flows for about 30 seconds after the start of energization.

When the surface temperature of the PTC thermistor heater rises due to energization and reaches a certain constant temperature, the PTC thermistor heater enters a steady operating state in which the temperature is maintained due to its self-temperature control characteristic.

When incorporating this positive temperature coefficient thermistor heater into a room air conditioner, the starting current of the room air conditioner is added, so
Room air conditioners are designed to delay the start of the positive temperature coefficient thermistor heater using relays, etc., so that the peaks of both types of air flow do not overlap.

In this case, the capacity of the relay is determined by the starting current value at startup, not by the current during steady operation of the positive temperature coefficient thermistor heater, so a relay with a large capacity is required.

Purpose of the invention The present invention attempts to connect and disconnect a positive temperature coefficient thermistor heater using a relay with a small current capacity, and will be explained below with reference to the drawings.

Summary of the invention This invention is a room air conditioner compressor 14. A positive temperature coefficient thermistor heater 19a in parallel with the fan mode 12,
19 b and connect this positive characteristic thermistor heater 19
8.19 Connect relay 17 contact 18 in series with b.
In the case where heat dissipation plates 1.2a and 2b, which also serve as conductive parts, are arranged on both sides, the positive temperature coefficient thermistor heater 19a,
19b is divided into a plurality of parts, and the heat sinks 2a, 2b are
One side is divided into a plurality of parts, the other side of the heat sink 1 is made common, and a plurality of contacts 18, 18 of the relay 17 are provided, and these contacts 18, 18 are connected in series to the divided positive temperature coefficient thermistor heaters, respectively. It is connected to.

Embodiment of the Invention An embodiment of the invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 1 denotes a lower heat sink, which has a large number of heat sink fins 1' on its lower surface.

2a and 2b are upper heat dissipation plates, with heat dissipation fins 2a' on the top surface.
, 2 b'.

3a and 3b are backings, and the heat sinks 1 and 2a are
Alternatively, it is interposed between 2b and 2b.

5a, 5b, 5C are lead wires, which connect the heat sinks 1, 2a,
2b.

Numeral 6 is a leg that supports the heat sink 1 upward.

19a and 19b are positive characteristic thermistor heaters,
It is divided into a plurality of parts and arranged between the heat sink 1 and 2a or 2b.

As for the room air conditioner, as shown in Fig. 3, change the changeover switch 10 to the cooling side a or the heating side, and turn the operation switch 11 to O.
When set to N, the indoor fan mode 12, outdoor fan mode 13, and compressor 14 operate.

The outdoor fan mode 13 and the compressor 14 are the temperature controller 1
5 turns on and off.

Set the changeover switch 10 to the heating side and turn the heater switch 1 on.
When 6 is turned ON, current flows to heater relay 17,
When the relay contact 18 is turned on, current flows to the positive temperature coefficient thermistor heater 192.19b.

Since the positive temperature coefficient thermistor heater is divided into two parts 19a and 19b, the starting current flowing through the contact 18 is small and a small capacity relay can be used.

Of course, by dividing the PTC thermistor heaters 19a and 19b into three or four parts, a relay with a smaller contact capacity can be used.

As shown in FIG. 2, the positive temperature coefficient thermistor heaters 19a and 19b have upper heat sinks 2a and 2b that also serve as conductive parts divided into two parts, so that the contacts 18 and 18 of the relay 17 are connected to the lead wires 5a and 5b. Can be easily connected via.

Of course, if you want to divide it into 3 or 4 parts, separate the upper heat sink, respectively.
Just divide it into 3 or 4 parts.

In addition, in FIG. 4, the relay 20 and the contact 21 of the loop 20 are provided separately from the relay 17 compared to FIG. 3, and by setting the delay time of each relay 17 and 20 separately, the correct The characteristic thermistor heaters 19a and 19b can each be operated with a certain time delay.

Effects of the Invention According to the invention, the starting current flowing through the divided contacts 18.18 is reduced by the amount of division, thereby making it possible to reduce the capacity of the relay 17.
, 2b is also divided, so contact 18 of relay 17
．． 18 can be connected.

[Brief explanation of drawings]

FIG. 1 is an external view of a positive temperature coefficient thermistor heater according to the present invention, FIG. 2 is a sectional view of a main part of FIG. 1, and FIGS. 3 and 4 are electrical circuit diagrams according to different inventions. 1... Lower radiation fin, 2, 2 a, 2 b
...Top radiation fin, 16...Heater switch, 17...Heater relay, 18
・・・・・・Heater relay contact, 19, 19a,
19b...Positive characteristic thermistor heater, 20.
...Relay for heater, 21...Contact point of relay for heater.

Claims (1)

[Scope of utility model registration request] 1. Room air conditioner compressor 14. fan mode 12
A positive temperature coefficient thermistor heater 193.19b is connected in parallel with the positive temperature coefficient thermistor heater 19a. The positive temperature coefficient thermistor heaters 19a, 19 are connected in series with the contact 18 of the relay 17 and the heat sinks 1, 2a, 2b which also serve as conductive parts are arranged on both sides.
b is divided into a plurality of parts, one side of the heat sinks 2a and 2b is divided into a plurality of parts, the other side of the heat sink 1 is made common, and a plurality of contacts 18 and 18 of the relay 17 are provided. .18 are connected in series to the divided positive temperature coefficient thermistor heaters. 2. The heating device t for a room air conditioner according to claim 1, wherein each part of the heater is sequentially energized after a certain period of time has elapsed.