KR20000040513A - Air conditioner for both cooling and heating - Google Patents

Abstract

PURPOSE: A cooling and heating air conditioner is provided to individually cool and heat based on the demand of a user by selectively flowing a coolant to an outdoor heat exchanger with plural four-way valves for changing the flow of the coolant. CONSTITUTION: A same cooling is demanded from a user in a first and a second room(12,14) and switch units(52,54) installed in a controller(50) are contacted in the identified direction. Since the a second and a third four-way valve(30,40) are converted in the identified direction, a coolant is flowed in the second and third four-way valves through a fifth and a sixth solenoid valve(70,72) from a compressor(2). The heat exchange is accomplished while the coolant passes through a second and a third outdoor heat exchangers(60,62). The coolant converted to a liquid state cools the ambient air, passing through a first and a second indoor heat exchanger(16,18) and performs the same cooling by discharging the cooled air to the indoor room. Then coolant is flowed in the other side of the second and third four-way valves(30,40) and is flowed in the compressor through a seventh and an eighth solenoid valve(76) so that the continuous cooling is performed.

Description

Air conditioning combined with heating and cooling

The present invention relates to an air conditioner for combined cooling and heating. More particularly, the present invention relates to an air conditioner having a plurality of four way valves, The present invention relates to a cooling and heating air conditioner capable of cooling and heating an air conditioner.

In general, maintaining the temperature and humidity within a certain space constantly to increase the efficiency of work is called air conditioning, and artificial means and devices used at this time are referred to as air conditioners. The air conditioner includes a heating device for raising the indoor temperature and a cooling device for lowering the temperature.

The heating device indirectly heats the air generated by oxidation of the heat source using a heat exchanger, and re-discharges the heated air to a high temperature, thereby heating the room.

The cooling device uses the endothermic effect generated by expansion of the compressed refrigerant to cool the surrounding air, and discharges the cooled air to the room, thereby cooling the room.

The air conditioner and the heating device are normally separated and purchased separately and used, but the cost of the air conditioner is large, resulting in a great economic burden. In order to solve such an economical problem, a multi-air-conditioner, which serves both as a cooling unit and a heating unit, has appeared in an air conditioner used as a unit by changing the direction of a refrigerant flowing therein. This multi-airconditioner allows the refrigerant to flow to the compressor, the condenser and the evaporator in the summer so as to cool the refrigerant, reverses the flow of the refrigerant in the winter, heats the air using the heat generated in the condenser, And is discharged to be heated.

1 and 2 are diagrams showing a refrigerant flow during a normal cooling and heating air conditioner cooling and heating operation. The overall configuration of the air conditioner is composed of a compressor 2 for compressing a refrigerant, Pressure refrigerant is selectively supplied to the first outdoor heat exchanger (condenser) 6 and the first and second indoor heat exchangers (evaporators) 12 and 14 provided in the first and second rooms 12 and 14 And a second expansion valve (10, 10a) connected to the inlet side of the first and second indoor heat exchangers (16, 18). The first and second expansion valves The first and second solenoid valves 8 and 8a are selectively turned on / off by the controller 22 so that the refrigerant passes through the first and second indoor heat exchangers 16 and 18, And a third and fourth solenoid valves 20 and 20a for controlling the flow of the refrigerant into the compressor 2 through the first and second solenoid valves 4 and 4, respectively.

Here, the first four-way valve 4 is a valve having an outlet or an inlet in four directions. The first one-way valve 4 is connected to the outlet side of the compressor 2 and the inlet side of the condenser 6 and the first and second indoor heat exchangers (evaporators) And is connected to the outlet side so as to be able to change the flow of the refrigerant. That is, the first, second, third, and fourth outlets 4a, 4b, 4c, and 4d and a movable end (not shown) capable of selectively opening and closing the respective outlets are provided therein.

In the cooling / heating combined air conditioner, the refrigerant compressed from the compressor 2 flows into the first inlet (outlet) 4a of the first four-way valve 4 and then flows into the second outlet (inlet) 4b. And is cooled to a liquid state in the process of passing through the condenser 6 through the condenser 6.

The refrigerant in the liquid state passes through the first and second expansion valves 10 and 10a through the first and second solenoid valves 8 and 8a opened according to the signal of the controller 22, .

The converted low-temperature and high-pressure refrigerant passes through the first and second indoor heat exchangers (16, 18) provided in the first and second rooms (12, 14) to cool the surrounding air, And then discharged into each room to cool.

The refrigerant having passed through the first and second indoor heat exchangers 16 and 18 passes through the third and fourth solenoid valves 20 and 20a and then flows into the third inlet (outlet) of the first four-way valve 4 4c and the fourth outlet (inlet) 4d to the suction side of the compressor 2.

On the other hand, the refrigerant compressed from the compressor 2 during the heating operation flows into the first inlet (outlet) 4a of the first four-way valve 4 and then discharged through the third outlet (inlet) 4c The operation of the evaporator during cooling passes through the first and second indoor heat exchangers 16 and 18 installed in the first and second rooms 12 and 14 through the third and fourth solenoid valves 20 and 20a, And the operation of the condenser is converted. That is, as the high-temperature and high-pressure refrigerant flows through the first and second indoor heat exchangers 16 and 18 and exchanges heat with surrounding air, the temperature of the air is increased, do.

However, when a plurality of rooms are cooled and heated, all of the rooms are cooled or heated at the same time, so that one room is heated according to the individual taste and the other is not satisfied when it is required to cool , There is a problem that dissatisfaction of the occupant increases.

Accordingly, it is an object of the present invention to solve the above-mentioned problems. Accordingly, it is an object of the present invention to provide a refrigerating machine, a refrigerating machine, a refrigerator, The object of the present invention is to provide a cooling and heating air conditioner capable of heating.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing a refrigerant flow during cooling operation of a general air-conditioner and a heating-

Fig. 2 is a configuration diagram showing a refrigerant flow during a heating operation of a common cold /

3 is a configuration diagram showing the flow of an air conditioner for both cold and heating according to the present invention.

Description of the Related Art [0002]

16, 18, first and second indoor heat exchangers 30, 40,

60, 62, the second and third outdoor heat exchangers 70, the fifth solenoid valve

72, a sixth solenoid valve 74, an eighth solenoid valve

76; the seventh solenoid valve

In order to achieve the above object, according to the present invention, the flow of coolant is changed by a four-way valve installed between the outlet side of the compressor, the inlet side of the first outdoor heat exchanger and the outlet side of the first and second indoor heat exchangers, And the first and second outdoor heat exchangers are connected to the first and second outdoor heat exchangers so that the refrigerant flows in the first and second indoor heat exchangers simultaneously and reversely, So that the air conditioner is heated.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Fig. 3 is a configuration diagram showing the flow of a combined air conditioning system for cold and heating according to the present invention.

1 and 2, the air conditioner is connected to the compressor 2 and the discharge side of the compressor 2, and the refrigerant is supplied to the first outdoor heat exchanger To the first and second indoor heat exchangers (16, 18) installed in the first outdoor heat exchanger (6) and the first and second rooms (12, 14) Is switched on / off by the controller 22 so as to flow into the first and second expansion valves 10 and 10a provided on the inflow side of the first and second indoor heat exchangers 16 and 18, A solenoid valve 8,8a and a third and fourth solenoid valves 16 and 17 installed on the discharge side of the first and second indoor heat exchangers 16 and 18 for introducing the refrigerant to the compressor 2 through the first four- And valves 20 and 20a.

Here, the first four-way valve 4 is a valve having the first, second, third and fourth outlets (inlet), which is connected to the outlet side of the compressor 2 and the inlet side of the condenser 6, And is connected to the outlet side of the units 16 and 18 so as to change the flow of the refrigerant.

In this cooling / heating air conditioner, the refrigerant flows from the compressor 2 to the first inlet (outlet) 4a of the first four-way valve 4 and then flows into the second outlet (inlet) 4b, Through the condenser (6) and is converted into a liquid state. The refrigerant is converted into low temperature and pressure via the first and second expansion valves 10 and 10a through the opened first and second solenoid valves 8 and 8a, The indoor air is cooled by passing through the first and second indoor heat exchangers (16, 18) installed therein and cooling the air around the first and second indoor heat exchangers (16, 18).

On the other hand, the flow of the refrigerant flowing from the compressor (2) through the first four-way valve (4) during the heating is reversed and flows to heat the room. That is, the high-temperature and high-pressure refrigerant is heat-exchanged with air around the first and second indoor heat exchangers (16, 18), and the air whose temperature has risen by heat exchange is discharged to the room, .

As described above, the first four-way valve 4 is used to reverse the flow of the refrigerant to vary the requirements for using each room in the process of cooling and heating (simultaneous cooling and heating A plurality of second and third outdoor heat exchangers (60, 62) are installed outdoors in the present invention, and at the inlet side and the outlet side of the second and third outdoor heat exchangers (60, 62) Way valve (30, 40) is installed so as to simultaneously perform cooling and heating.

Here, the second way valve 30 allows the refrigerant to pass through the second outdoor heat exchanger 60 through the fifth solenoid valve 70 connected to the compressor 2 during the cooling, and the second indoor heat exchanger 16 to the compressor 2 via a seventh solenoid valve 76 provided on the inflow side of the compressor 2. The second solenoid valve 76 is connected to the second solenoid valve 76 via the second solenoid valve 76,

In addition, the third three-way valve 40 is configured such that the refrigerant discharged from the output side of the compressor 2 through the refrigerant in the heating mode flows through the sixth solenoid valve 72 and the third four-way valve 40 to the second indoor heat exchanger The refrigerant flowing from the second indoor heat exchanger 18 through the third outdoor heat exchanger 62 flows into the compressor 18 through the third one way valve 40 and the eighth solenoid valve 74, 2).

The second and third three-way valves 30 and 40 are controlled by a controller 50 provided with switch parts 52 and 54 for switching between heating and cooling.

When the same cooling is requested from the user in the first and second rooms 12 and 14, if the switch parts 52 and 54 provided on the controller 50 are brought into contact with each other in the same direction, The refrigerant is introduced into the second and third four-way valves 30 and 40 from the compressor 2 through the fifth and sixth solenoid valves 70 and 72, , And the three outdoor heat exchangers (60, 62).

The refrigerant that has undergone the heat exchange and is converted into the liquid state passes through the first and second indoor heat exchangers 16 and 18 to cool the surrounding air and discharges the cooled air to the room to perform the same cooling.

The refrigerant passing through the first and second indoor heat exchangers 16 and 18 flows into the other side of the second and third four way valves 30 and 40 and then flows through the seventh and eighth solenoid valves 76 and 64 2) to continuously cool air.

On the other hand, when heating is requested from the second room 14 while cooling is being performed, the switch 54 of the controller 50 is brought into contact again to switch the third way valve 40 in the opposite direction, Passes through the sixth solenoid valve 72 and the third port valve 40 and then passes through the second indoor heat exchanger 18 installed in the second room 14 to discharge heat .

That is, the heat discharged through the second indoor heat exchanger 18 is discharged to the room to be heated. Thereafter, the refrigerant absorbs heat while passing through the third outdoor heat exchanger 62, Flows into the compressor (2) through the first solenoid valve (40) and the eighth solenoid valve (74) to continuously heat.

As a result, the first and second rooms 12 and 14 meet different requirements.

As described above, according to the present invention, the four-way valve for converting the flow of the refrigerant discharged from the compressor is connected to the outdoor heat exchanger, and the flow of the refrigerant is changed by operating the four-way valve, There is an advantage that the required conditions of cooling and heating are satisfied.

Claims (3)

Way valve 4 provided between the outlet side of the compressor 2 and the inlet side of the first outdoor heat exchanger 6 and the outlet side of the first and second indoor heat exchangers 16 and 18, To change the cooling and heating modes, Way valves 30 and 40 are connected to the second and third outdoor heat exchangers 60 and 62 so that the refrigerant flows into the first and second indoor heat exchangers 16 and 18 simultaneously So as to be individually cooled and heated. The method according to claim 1, The second way valve 30 allows the refrigerant to flow into the second outdoor heat exchanger 60 through the fifth solenoid valve 70 connected to the compressor 2 during the cooling operation, Is connected to the compressor (2) through the seventh solenoid valve (76), and is introduced into the second waterway valve (30) through the third solenoid valve (76). The method according to claim 1, The third way valve (40) is connected to the second indoor heat exchanger (18) through a sixth solenoid valve (72) and a third way valve (40) through the output side of the compressor (2) And the refrigerant having passed through the third outdoor heat exchanger 62 in the second indoor heat exchanger 18 is installed to flow into the compressor 2 through the third four way valve 40 and the eighth solenoid valve 74 And the air conditioner of the present invention.