JPS5822045Y2 - Air conditioner/heater operation control device - Google Patents

Description

[Detailed Description of the Invention] The present invention provides an operation control device for an air-conditioning/heating machine equipped with a refrigerant heating heater and a refrigerant heater equipped with the refrigerant heating heater.

As a configuration for that purpose, the present invention sequentially connects a compressor, a four-way valve, an indoor heat exchanger, a reduction mechanism, an outdoor heat exchanger, a refrigerant heater, the four-way valve, and the compressor in an annular manner, and A cooling/heating changeover switch is provided which has a side contact and a second air-conditioning side contact and switches two circuits on the heating side and cooling side at the same time. 2
an indoor thermoswitch having a contact and whose first contact turns OFF and whose second contact turns ON when the indoor temperature rises above a predetermined value; The compressor, the outdoor blower contact, and the outdoor blower connected in series thereto are each connected in parallel to a power source, and a second heating side contact of the cooling/heating changeover switch is turned OFF when the first relay coil is not energized.
A first contact for a heater is connected, and a second contact is connected in series through the first contact for a heater to the coil of the four-way valve and to an outside temperature thermoswitch that turns off when the outside temperature rises above a predetermined value. An auxiliary heater for heating a refrigerant, which is connected in series to a pressure switch through a second contact for the heater, which is turned off when the relay coil is de-energized, and the first contact for the heater, with a relay coil connected to a power source in parallel; The coils of the switch that turns ON and OFF the electricity to the main heating heater are connected to the power supply in parallel, and the coils of the switch of the normal condenser, the outdoor blower, the main heater for refrigerant heating, and the auxiliary refrigerant heating are connected to the power supply in parallel. Turn on the heater etc.

A low voltage switch that turns off is connected to the power source.

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

That is, as shown in FIG. 2, there is a compressor 1, a four-way valve 2, an indoor heat exchanger 3 which acts as an evaporator during cooling and a condenser during heating, a moth reduction mechanism 4, and an outdoor unit which acts as an evaporator during air heat pump heating operation. A refrigerant heater 8 including a heat exchanger 5, a main heater 6 for heating the refrigerant, and an auxiliary heater 7 for heating the refrigerant is connected in a ring, and an indoor blower 9 and an outdoor blower 10 are connected.
When the outside air temperature is high during heating, a heat pump is operated using an air heat source, power is stopped to the main heater 6 for heating the refrigerant and the auxiliary heater 7, and the outdoor blower 10 is activated. It is.

In addition, when the outside temperature is low, conversely, the refrigerant heating heater 6
Then, the auxiliary heater 7 for heating the refrigerant is activated and the outdoor blower 10 is stopped.

Furthermore, when the main heater 6 for heating the refrigerant and the auxiliary heater 7 for heating the refrigerant are energized, an increase in the air temperature acting on the indoor heat exchanger 3 and an abnormally low motive power due to a decrease in the air volume of the indoor blower 9 are prevented. For this purpose, input control of the auxiliary heater 7 is performed.

Furthermore, if the main heater 6 for heating the refrigerant and the auxiliary heater 7 for heating the refrigerant do not operate for some reason, a liquid return operation in which unevaporated refrigerant returns to the compressor 1 occurs, and this is prevented. When the main heater 6 for heating the refrigerant and the auxiliary heater 7 for heating the refrigerant are inoperable, the compressor 1 is stopped and protected.

Next, a detailed explanation will be given with reference to FIG. 1 of the drawings.

11 is an operation switch, and 12 is a low pressure switch.

Reference numeral 13 is a time switch for delaying the operation of the indoor fan 9.

14 is a cooling/heating changeover switch, which has a first heating side contact 14a1;
It has a second heating side contact 14a2, a first cooling side contact 14b1, and a second cooling side contact 14b2.

15 is an indoor thermo switch, which is the cooling/heating changeover switch 1;
The first contact 15 connected to the first heating side contact 14a1 of No. 4
a14 Warmth selector switch 14? ! Chamber side contact 14b1
The second contact point 15b is connected to the second contact point 15b.

16 is the second ? of the cooling/heating changeover switch 14? /+A neon lamp for cooling connected to the power supply via the room side contact 14b2; 17 is the first heating side contact 1 of the cooling/heating changeover switch 14;
4a, and the first contact 1 of the indoor thermoswitch 15
heating neon lamp connected to the power supply via 5a, 1
Reference numeral 8 denotes a first relay coil connected in parallel to the power supply side via the cooling/heating changeover switch 14 and the indoor thermoswitch 15.

The compressor 1 and the outdoor blower 10 are connected in parallel to a power source via a cooling/heating changeover switch 14 and an indoor thermoswitch 15, respectively.

19 is an overcurrent relay that protects the compressor 1, 20 is an operating capacitor for the compressor 1, 21 is a fixed resistor, 22 is a thermoswitch for detecting outdoor temperature, 23 is a capacitor, and 24 is an operating capacitor for the outdoor blower.

The thermoswitch 22 and the capacitor 23 are used to control the rotational speed of the outdoor fan 10 based on the outside air temperature.

25 is an outside temperature thermoswitch, and 27 is a second relay coil provided in series with the outside temperature thermoswitch 25.

The outside temperature thermostat 25 and the second relay coil 27 are connected to the power source via the second heating side contact 14a2 of the heating/cooling changeover switch 14.

Reference numeral 26 denotes a switch for the main heater 6 for heating the refrigerant, and like the auxiliary heater 7 for heating the refrigerant, it is connected in parallel to the power supply side via the second heating side contact 14a2 of the cooling/heating changeover switch 14.

28 is a pressure switch connected in series with the auxiliary heater 7 for heating the refrigerant.

32 is a temperature fuse, and 33 is a temperature thermoswitch, which are connected in series with the switch 26 for the main heater 6, the pressure switch 28, and the auxiliary heater 7.

29 is a first contact for a heater operated by the first relay coil 18, and a second heating side contact 1 of the cooling/heating changeover switch 14.
All the circuits connected to the power supply via 4a2 are opened and closed, and the contacts of the first relay coil 18 are opened when the first relay coil 18 is not energized.

Reference numerals 30 and 31 are an outdoor blower contact and a second heater contact, which are operated by the second relay coil 27, respectively.The outdoor blower contact 30 is connected in series with the outdoor blower 10, and the second heater contact 31 is used to open and close the main heater 6. The heater 26 and the auxiliary heater 7 are connected in series.

The outdoor blower contact 30 opens the contact of the outside temperature thermoswitch 25 when the outside temperature rises, closes the contact when the second relay coil is de-energized, and conversely closes the contact of the outside temperature thermoswitch 25.
is open when not energized.

Next, the operation will be explained.

When the operation switch 11 is set to blow air, only the indoor blower 9 operates.

For heating, the cooling/heating changeover switch 14 is set to the first heating contact 14a1 and the second heating contact 14a2 (solid line in the figure), and the contact of the indoor thermo switch 15 is set to the first contact 15a.
will be contacted.

Here, if the outside temperature is high, use the outside temperature thermo switch 2.
Contact point 5 is open.

Further, the low distortion switch 12 is closed.

When the operating switch 11 is operated (strong, medium, weak) in this state, the heating neon lamp 17 lights up, the first relay coil 18 is energized, and the first heater contact 29 is closed.

Further, since the second relay coil 27 is not energized, the outdoor blower contact 30 is closed and the second heater contact 31 is open.

Therefore, the compressor 1 is driven by the action of the operating capacitor 20, while the outdoor blower 10 is driven by the action of the operating capacitor 24,
The fixed resistor 21, the thermoswitch 22 for detecting outdoor temperature, and the capacitor 23 are used to drive the unit.

Further, the four-way valve 2 is in an energized state, as shown by the solid line in FIG.

On the other hand, since the second heater contact 31 is open, the main heater 6 for heating the refrigerant and the auxiliary heater 7 for heating the refrigerant are not energized.

Therefore, the heat pump heating operation is performed using a normal air heat source.

Further, when the outside air temperature drops during heating, the contact of the outside air temperature sensor switch 25 is closed, and the second relay coil 27 is energized.

This closes the second contact 31 for the heater, and conversely opens the contact 30 for the outdoor blower.

By opening the outdoor blower contact 30, electricity to the outdoor blower 10 is cut off.

By closing the second contact 31 for the second heater, electricity is supplied to the main heater 6 for heating the refrigerant via the switch 26 and to the auxiliary heater 7 for heating the refrigerant, and the refrigerant heater 8 is operated as an evaporator. .

The auxiliary heater I for heating the refrigerant is connected in series with the pressure switch 28, and the pressure switch 28 is turned off when the temperature rise becomes large due to a decrease in the amount of air blown to the indoor heat exchanger 3 or an increase in the temperature of the air blown. The power supply to the auxiliary heater 7 is cut off, and only the main heater 6 for heating the refrigerant is operated.

Furthermore, when the indoor temperature rises and reaches the set temperature of the indoor thermoswitch 15, the second contact 15b is switched (dotted line in the figure), and the power to the compressor 1, outdoor blower 10, and 11th J Ray coil 18 is cut off. Since the first heater contact 29 opens, power to the four-way valve 2, the second relay coil 27, the main heater 6 for heating the refrigerant, and the auxiliary heater 7 is stopped, and only the indoor fan 9 and the heating neon lamp 17 are operated. continue.

Next, during heating operation using the refrigerant heater 8, the main heater 6 for heating the refrigerant and the auxiliary heater 7 for heating the refrigerant do not operate due to the operation of the safety device temperature fuse 32 or temperature thermoswitch 33 or a failure of the heater itself. in case of,
The refrigerant returns to the compressor 1 unevaporated, and the low pressure naturally decreases.

If the pressure is below the setting, turn on the low pressure switch 1.
Open the contacts of 2, indoor blower 9, outdoor blower 10, compressor 1, main heater for refrigerant heating 6, refrigerant auxiliary heater 7,
The power supply to the four-way valve 2 is cut off.

Next, the effect during cooling will be explained.

During cooling operation, the i-th and 4th room side contacts 14b1 of the cooling/heating changeover switch 14 are switched to the second cooling side contacts 14b2, and the indoor thermoswitch 15 is switched to the second contact 15b.

Further, since the second relay coil 27 is not energized, the outdoor fan contact 30 connected in series with the outdoor fan 10 is in a closed state, and the second heater contact 31 is in an open state.

(Dotted line in the figure) In this state, operate the operation switch 11 (strong,
(medium, low), the refrigerant neon lamp 16, the first relay coil 18, the compressor 1, and the outdoor blower 10 are energized and activated to perform heat pump cooling operation using the air heat source.

Here, the four-way valve 2, the main heater 6 for heating the refrigerant, and the auxiliary heater 7 for heating the refrigerant are not energized.

As described above, the present invention is an air conditioner that performs heating using a refrigerant heater. To use equipment efficiently when the temperature rises, use an outside temperature thermoswitch to switch between heating using a refrigerant heater and heating with a heat pump. It is possible to turn off the refrigerant heating auxiliary heater with a pressure switch that operates by detecting the shock force, and the compressor suction force can be detected in the event of a failure of the refrigerant heating main heater or refrigerant heating auxiliary heater. This is an extremely practical device that can smoothly control circuit interruption of the compressor, indoor/outdoor blower, main heater for refrigerant heating, and auxiliary heater for refrigerant heating using a low-pressure switch operated by .

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing an operation control device for an air conditioner/heater according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a refrigerant circuit of the air conditioner/heater. 1... Compressor, 2... Four-way valve, 5...
...Outdoor heat exchanger, 6...Main heater for heating refrigerant, 7...Auxiliary heater for heating refrigerant, 8.
... Refrigerant heater, 10 ... Outdoor blower,
12...Low mode switch, 14...Cooling/heating changeover switch, 14a1...First heating side contact,
14a2...Second heating side contact, 14b1...
...First cooling side contact, 14b2... Second cooling side contact, 15... Indoor thermo switch, 15a
......first contact, 15b...second contact,
18...11th J Lecoil, 25...
・Outside temperature thermo switch, 27...Second relay coil, 28...Pressure switch, 29...
...First contact for heater, 30...Contact for outdoor blower, 31...Second contact for heater.

Claims (1)

[Scope of utility model registration request] A compressor, a four-way valve, an indoor heat exchanger, a volume reduction mechanism, an outdoor heat exchanger, a refrigerant heater, the four-way valve, and the compressor are sequentially connected in an annular manner. e chamber side contact and second
A cooling/heating changeover switch is provided which has a heating side contact and a second cooling side contact and switches two circuits on the heating side and the cooling side at the same time, and is connected to the first contact connected to the first heating side contact and the first e room side contact. and a second contact point, and the first contact point is turned OFF and the second contact point is turned ON when the indoor temperature exceeds a predetermined value. The first IJ relay coil, the compressor, the outdoor blower contact, and the outdoor blower connected in series thereto are each connected in parallel to a power supply, and the second heating side contact of the cooling/heating changeover switch is connected to the first IJ relay coil when it is de-energized. A first contact for a heater that is turned OFF when An auxiliary heater for refrigerant heating, in which two relay coils are connected to a power source in parallel, and connected in series to a pressure switch via a second heater contact that turns off when the second relay coil is de-energized, and the first heater contact. , turn on the power to the main heater for heating the refrigerant.
, a low-pressure switch that connects the coil of the switch to be turned OFF to a power source in parallel, and turns on and off the compressor, the outdoor blower, the coil of the switch of the main heater for heating the refrigerant, the auxiliary heater for heating the refrigerant, etc. Operation control device for heating and cooling equipment connected to the power supply side.