KR100569277B1 - A complex cooling and heating apparatus - Google Patents

Abstract

The present invention is to solve the problem that the conventional combined heater does not operate properly in the cold winter or the outdoor unit is not properly operated because of the compressor, and the compressor for extruding the refrigerant at high temperature and high pressure, the high temperature and high pressure in the compressor To heat the indoor air by heat-exchanging the refrigerant compressed to indoor air, an expansion unit for expanding the high-pressure refrigerant passing through the indoor unit, and a heat exchanger for exchanging low-temperature refrigerant and external air passing through the expansion unit. A heating apparatus having an outdoor unit for heating, and a heat exchanger for exchanging a high-pressure refrigerant heat exchanged by the compressor and drawn out from the compressor and heat-exchanged by the compressor, wherein the expansion unit passes through the heat exchanger. A distribution pipe connected to one refrigerant pipe and a refrigerant inlet of the outdoor unit. And expansion tube end is connected to a heating device comprising a plurality of capillaries set of connecting the said pipe and the expansion pipe.

Expansion part, heat exchanger, distribution pipe, expansion pipe, all sides

Description

A complex cooling and heating apparatus

1 is a piping diagram of a conventional complex air conditioner.

2 is a piping diagram of a complex air-conditioning apparatus of the present invention.

3 is a view for explaining the operation when the complex air-conditioning device of the present invention operates as a cooling device.

4 is a view for explaining the operation of the composite heating and cooling device of the present invention when operating as a heating device.

 The present invention relates to a complex cooling and heating device, and more particularly, to a cold heating device that can operate as a heater even in a very cold weather conditions when the outdoor temperature falls below zero in winter.

Cooling and heating configured to operate as a cooling device and heating device in summer to create a cool indoor environment by lowering the indoor temperature by operating as a cooling device, and as a heating device in winter to create a warm indoor environment by operating as a heating device. The device has been developed and used.

Such conventional air-conditioning apparatuses have used a method of additionally providing a means for heating by burning light oil or gas and a electric coil method for additionally installing an electric heater.

However, in the former case, there is a problem of oxygen deficiency in the manner of burning dissolved oxygen in the room, and in the latter case, there is a problem of causing excessive electricity consumption because electricity is used.

Conventional air-conditioning and heating devices have also been developed using a refrigerant to operate a cooling device when it is hot and a heating device when it is cold. The main technical configuration of the conventional air-conditioning system is an indoor unit installed indoors, An outdoor unit installed outdoors, a compressor for compressing and sending the refrigerant, an expansion unit for changing the refrigerant to a low temperature before being supplied to the indoor unit or the outdoor unit, and a plurality of valves for controlling the flow of the refrigerant.

The indoor unit of this cooling / heating system cools the indoor air through heat exchange with the refrigerant introduced during cooling, and heats the indoor air through heat exchange with the refrigerant introduced during heating. The outdoor unit cools the refrigerant introduced through heat exchange with the outdoor air during cooling, condenses the refrigerant introduced through heat exchange with the outdoor air during heating, and heats the indoor air.

The expansion unit expands the refrigerant introduced into the outdoor unit during heating to cool it at a lower temperature than the outdoor air, and expands the refrigerant introduced into the indoor unit during cooling to cool it to a lower temperature than the indoor air.

However, such a cooling / heating system has a problem of mechanical durability as well as a large amount of heat required to compress the high-temperature and high-pressure refrigerant from the compressor because the low-temperature refrigerant flowing out from the outdoor unit directly enters the compressor. In addition, the cooling and heating system has a problem in that when the outdoor temperature of the heating is below 5 degrees Celsius or less, frosting occurs in the outdoor unit, so that the outside air cannot be obtained and frost is caught.

In order to solve this problem, a further improved invention is described in Patent Registration 10-0436843 registered patent publication.

The invention (regenerative combined cooling and heating system) described in this publication is as shown in FIG. 1, and the configuration thereof includes a compressor 10 for compressing a refrigerant at a high temperature and a high pressure, and an expanded low temperature expansion that is installed indoors and is introduced during cooling. The indoor air 20 is cooled by heat-exchanging the refrigerant and indoor air, and the indoor unit 20 heats the indoor air by heat-exchanging the refrigerant and indoor air at the time of heating, and the high temperature and high pressure which is installed outdoors when the air is cooled. Heat-exchanging the refrigerant to release heat in the atmosphere, and during the heating, the outdoor unit 60 for heating the refrigerant by heat-exchanging the introduced expanded refrigerant and external air, and the high-temperature refrigerant and the compressor introduced into the outdoor unit 60 for heating ( 10, the low temperature refrigerant flowing into the first heat exchanger 30, the second heat exchanger 40 and the high temperature refrigerant flowing into the outdoor unit 60 during heating and the low temperature refrigerant flowing into the compressor 10 Refrigerants The first expansion unit 50 for expanding the high-temperature refrigerant flowing into the outdoor unit 60 in the state of low-temperature low-pressure wet steam while heat-exchanging, and the second expansion unit 70 for expanding the refrigerant introduced into the indoor unit 20 at low temperature. )

The heating operation is compressed by the compressor 10, the high temperature and high pressure refrigerant having a temperature of t 1 is introduced into the indoor unit 20 through the four-way valve 12, the indoor air through heat exchange with the indoor air in the indoor unit 20 At the same time as heating the temperature of itself it is first condensed and lowered to the temperature of t 2 (t 1> t 2). The refrigerant condensed at a temperature of t 2 passes through the first check valve 82 and passes through the first heat exchanger 30 through the pipe line 95 to be second condensed to be lowered to a temperature of t 3. The refrigerant passing through the group 30 is condensed tertiarily while passing through the second heat exchanger 40 and lowered to a temperature of t 4. Subsequently, the refrigerant having passed through the second heat exchanger 40 is condensed through the first expansion part 50 to be condensed four times to further lower the temperature, thereby expanding to a low temperature wet steam having a temperature of t 5 lower than that of outdoor air. . Thereafter, the wet steam refrigerant having a temperature of t 5 passing through the first expansion part 50 is supplied to the outdoor unit 60 through the piping line 98, and is heat-exchanged with the outdoor air in the outdoor unit 60. It absorbs the outside temperature and itself evaporates first to a temperature of t 6. Meanwhile, the refrigerant heated at the temperature t 6 in the outdoor unit 60 is heat-exchanged with the high temperature refrigerant introduced into t 3 while passing through the second heat exchanger 40 and is secondly evaporated to the temperature t 7 (t 6 < t 7). That is, the refrigerant directed to the compressor 10 is heated to a temperature of t 7, and the refrigerant directed to the first outdoor unit 60 is cooled to a temperature of t 4. Thereafter, the refrigerant having a temperature of t 7 passing through the second heat exchanger 40 is heat-exchanged with the high temperature refrigerant flowing into t 4 as described above while passing through the first expansion part 50 and thus the temperature of t 8. Third evaporation (t 7 <t 8). That is, the refrigerant directed to the compressor 10 is heated to a temperature of t 8, and the refrigerant directed to the first outdoor unit 60 is cooled to a temperature of t 5. At this time, the third evaporated refrigerant serves to narrow the difference between the outlet side temperature and the outside air temperature of the first expansion unit 50 by heat exchange. Therefore, it is possible to prevent the frosting by lowering the outside air temperature in winter and to facilitate heat exchange with outdoor air. In addition, the refrigerant having a temperature of t 8 evaporated in the first expansion part 50 is heat exchanged with a high temperature refrigerant introduced into t 2 as described above while passing through the first heat exchanger 30, and thus the temperature of t 9. 4 th evaporated (t 8 <t 9). That is, the refrigerant directed to the compressor 10 is heated to a temperature of t 9, and the refrigerant directed to the outdoor unit 60 is lowered to a temperature of t 3. Finally, the refrigerant heated to a temperature t 9 in the first heat exchanger 30 is supplied to the compressor 10 and compressed again to a high temperature and high pressure to be converted into a refrigerant having a temperature t 1 (t 9 <t 1). Therefore, the high temperature refrigerant having a temperature of t 2 flowing out of the indoor unit 20 is lowered to a temperature of t 3 while passing through the first heat exchanger 30, and the t 4 is passed through the second heat exchanger 40. The temperature is lowered to a temperature and is passed through the first expansion part 50 to be cooled in a low temperature wet steam state having a temperature of t 5 and introduced into the outdoor unit 60. In addition, the refrigerant flowing out of the outdoor unit 60 as a temperature of t 6 is heated to a temperature of t 7 while passing through the second heat exchanger 40, and heated to a temperature of t 8 while passing through the first expansion part 50. And further heated to a temperature of t 9 through the first heat exchanger 30 to flow into the compressor 10. Therefore, since the refrigerant of high temperature flows into the compressor 10, the amount of heat required to compress the introduced refrigerant to high temperature and high pressure can be greatly saved.

In addition, in this publication, between the first expansion unit 50 and the outdoor unit 60, the heat exchanger 80 in which the refrigerant expanded in the first expansion unit 50 and the refrigerant discharged from the outdoor unit 60 exchange heat with each other. In addition, another example is described, in which the first heat exchanger 30, the second heat exchanger 40, the first expansion unit 50 and the third heat exchanger 80 are installed in this order. The high temperature refrigerant flowing out of the indoor unit 20 sequentially passes through the first heat exchanger 30, the second heat exchanger 40, the first expansion unit 50, and the third heat exchanger 80. Cooled in a state, it flows into the outdoor unit (60). Meanwhile, the refrigerant flowing out of the outdoor unit 60 is heat-exchanged with the high-temperature refrigerant in the second heat exchanger 40, and then moves to the third heat exchanger 80 to be heat-exchanged again. Flows into (10). Therefore, it is described that the first expansion part 50 can efficiently recycle the waste heat of the high temperature refrigerant without heat exchange between the high temperature refrigerant and the low temperature refrigerant.

However, when the regenerative combined air-conditioning system and the conventional air-conditioning system developed as a heating device are operated as a heating device, when the outdoor temperature drops by about 10 to 20 degrees below zero, the compressor function is significantly reduced and its operation is performed. There is a problem that stops or causes a failure, even if part of the operation is very low efficiency has a problem that can not achieve the thermal efficiency over the electric heater.

The inventors of the present invention have a problem that the compressor does not operate properly according to the temperature of the outside air because the configuration of the heating device used as a heater in the conventional complex air conditioner is circulated through all of the outdoor unit in the same direction the refrigerant used in the indoor unit. It is to provide a heating and cooling device that can be solved.

The present invention provides a method for solving the conventional problem by additionally installing a refrigerant passage bypassing the outdoor unit in the existing air conditioner structure, allowing the refrigerant passing through the outdoor unit and the refrigerant not passing through to the front of the compressor. In order to provide a cooling and heating device that connects a plurality of capillary expanders in parallel and connects a plurality of capillary expanders in parallel to the outdoor unit and controls the flow of the refrigerant passing through the outdoor unit by installing a control valve in some capillary tubes.

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The present invention provides a compressor for extruding a conventional refrigerant at high temperature and high pressure, and an outdoor unit for allowing a portion of the refrigerant passing through the indoor unit and the refrigerant passing through the outdoor unit to join the compressor before being introduced into the compressor in a conventional air conditioner having an indoor unit and an outdoor unit. It is characterized by including a refrigerant bypass passage to bypass. The amount of the refrigerant bypassing the outdoor unit is controlled by a control valve, and the pressure and temperature of the refrigerant introduced into the compressor are properly adjusted according to the outdoor temperature so that the compressor can operate well.
The air-conditioning device of the present invention includes a compressor for extruding a refrigerant at high temperature and high pressure, an indoor unit for heating indoor air by heat-exchanging the refrigerant compressed to high temperature and high pressure in the compressor, and expanding the high pressure refrigerant passing through the indoor unit. An expansion unit, an outdoor unit that heats the refrigerant by heat-exchanging low-temperature refrigerant and outdoor air passing through the expansion unit, and the expanded refrigerant heated in the outdoor unit and the high-pressure refrigerant drawn out of the compressor and passing through the indoor unit to exchange heat. A heating apparatus having a heat exchanger for exchanging heat, the expansion unit comprising: a distribution pipe connected to the refrigerant pipe passing through the heat exchanger; an expansion pipe connected to one end of the refrigerant inlet of the outdoor unit; It is a heating device including a plurality of capillary set connecting the pipes.
Here, the capillary set includes two or more capillaries, and connects the other end of the first capillary and the other end of the expansion tube of the capillary set, and installs a solenoid valve for controlling the flow of the refrigerant in the second capillary tube of the capillary set And connect the other end with the other end of the expansion pipe, install a solenoid valve for controlling the flow of the refrigerant in the third capillary tube of the capillary assembly, connect the other end with the refrigerant inlet of the heat exchanger, It has a temperature sensor for detecting the temperature of the refrigerant introduced into the air, characterized in that it comprises a controller for generating a signal for controlling the refrigerant flow of the solenoid valve in accordance with the temperature detected by the temperature sensor.

In addition, further comprising a fourth capillary tube connecting the refrigerant passing through the solenoid valve for controlling the flow of the refrigerant of the third capillary tube to the expansion pipe portion, wherein the capillary set is at least two connected with the second capillary tube Having capillaries, said heat exchanger further comprises a passage through which a heat medium for heating or cooling the refrigerant flows.

The present invention provides a compressor for extruded refrigerant at a high temperature and high pressure, and is installed in a room and heats the expanded air of a low temperature, which is introduced during cooling, and heats the indoor air to cool the indoor air, and a high temperature, high pressure refrigerant and indoor air that is introduced during heating. An indoor unit that heats the indoor air by heat-exchanging the heat, and heats the high-temperature and high-pressure refrigerant that is introduced during cooling to release heat into the atmosphere, and an outdoor unit that heats the refrigerant by heat-exchanging the introduced expanded refrigerant and outdoor air when the heating is performed; In the combined cooling and heating device comprising a heat exchanger for heat-exchanging the refrigerant introduced into the compressor and the refrigerant compressed and withdrawn from the compressor with each other or with other heating means or cooling means, the refrigerant passing through the heat exchanger Is installed at the inlet of the outdoor unit flowing to the outdoor unit, the outdoor unit A check valve allowing only a flow of the refrigerant passing through the heat exchanger, a distribution pipe connected to the refrigerant pipe passing through the heat exchanger, an expansion pipe connected to one end of the refrigerant inlet of the outdoor unit, and the distribution pipe and the expansion pipe It is a composite cold heating device including a plurality of capillary sets connecting between.

Here, the capillary set includes two or more capillaries, and connects the other end of the first capillary and the other end of the expansion tube of the capillary set, the solenoid valve for controlling the flow of the refrigerant to the second capillary tube of the capillary set And a solenoid valve for controlling the flow of the refrigerant in the third capillary tube of the capillary assembly, connecting the other end thereof with the other end of the expansion pipe portion, and connecting the other end thereof to the refrigerant inlet portion of the heat exchanger. It has a temperature sensor for detecting the temperature of the refrigerant introduced into the heat exchanger, characterized in that it comprises a controller for generating a signal for controlling the refrigerant flow of the solenoid valve in accordance with the temperature detected by this temperature sensor.

In addition, it characterized in that it has a fourth capillary tube for connecting the refrigerant passing through the solenoid valve for controlling the flow of the refrigerant of the third capillary tube to the expansion tube, and two or more capillary tubes connected with the second capillary tube. .

 (Example)

An embodiment of the present invention will be described in detail with reference to FIGS. 2 to 4.

The structure of the composite air-conditioning apparatus of the present invention is a compressor 110 for extruding a refrigerant at a high temperature and high pressure, and is installed in a room to cool the indoor air by heat-exchanging the inflated refrigerant with low temperature, which is introduced therein, and when heating. The indoor unit 120 heats the indoor air by heat-exchanging the high-temperature high-pressure refrigerant and the indoor air, and in the case of cooling, heats the high-temperature high-pressure refrigerant to release heat into the atmosphere, The outdoor unit 190 for heating the refrigerant by heat-exchanging the outside air and the refrigerant introduced into the compressor 110 and the refrigerant compressed and drawn out of the compressor may be heat-exchanged with each other, or provided with other heating or cooling means to heat or cool the refrigerant. The first expansion unit 140 and the thermal bridge having a heat exchanger 130, the refrigerant passing through the heat exchanger 130 is installed at the inlet of the outdoor unit flowing to the outdoor unit 190, The refrigerant passing through the air 130 flows to the indoor unit 120, and the first expansion unit 140 includes a check valve 141 allowing only the flow of the refrigerant passing through the outdoor unit 190 to the heat exchanger 130. The distribution pipe 142 connected to the refrigerant pipe 131 passing through the heat exchanger 130, the expansion pipe 146 having one end connected to the refrigerant inlet of the outdoor unit 190, the distribution pipe 142 and the expansion pipe. Capillary set 144, 145, 147, 148 to connect between the 146, the capillary 145 is a structure that is incorporated into the inlet pipe 132 of the heat exchanger (130).

The configuration of the heating device of the present invention is a compressor (110) for extruding the refrigerant at high temperature and high pressure, the indoor unit 120 for heating the indoor air by heat exchange with the refrigerant compressed to high temperature and high pressure in the compressor 110, and the indoor unit Expansion unit 140 for expanding the high-pressure refrigerant passing through the 120, the outdoor unit 190 for heating the refrigerant by heat-exchanging the low-temperature refrigerant and the outdoor air passing through the expansion unit, and the expanded refrigerant warmed in the outdoor unit And a heating device having a heat exchanger 130 which is drawn out from the compressor and passes through an indoor unit to heat exchange the high-pressure refrigerant that has been heat-exchanged. The expansion unit 140 includes a distribution pipe 142 connected to the refrigerant pipe 131 passing through the heat exchanger 130, an expansion pipe 146 connected to one end of the refrigerant inlet of the outdoor unit 190, and a distribution pipe ( And a capillary set (144, 145, 147, 148) consisting of a plurality of capillaries connecting between the 142 and the expansion tube (146).

Expansion portion 140 has a capillary set comprising two or more capillaries (143, 144, 145, 147, 148), the other end of the first capillary tube 145 and the other end of the expansion tube 146 of the capillary set And a solenoid valve 153 for controlling the flow of the refrigerant in the second capillary tube 147 of the capillary assembly, and connecting the other end to the expansion tube 146 and to the third capillary tube 143 of the capillary assembly. A temperature for installing a solenoid valve 154 for controlling the flow of the refrigerant and connecting the other end to the refrigerant inlet 132 of the heat exchanger 130 and detecting the temperature of the refrigerant in the pipe 133 introduced into the heat exchanger Controller for installing the sensor 151 and generating a signal for controlling the refrigerant flow of each solenoid valve 152-154 according to the temperature detected by the temperature sensor 151 and supplying it to each solenoid valve 152-154. 150.

In addition, it is preferable to further provide a fourth capillary tube 144 for connecting the refrigerant passing through the solenoid valve 154 to control the flow of the refrigerant in the third capillary tube 143 to the expansion tube 146. In addition, the capillary assembly may be provided with two or more capillary tubes connected in parallel with the second capillary tube 147.

The heat exchanger 130 is a heat exchange between the two refrigerant passages in which the flow of the refrigerant is made, and additionally providing a passage through which a third heat medium for heating or cooling the refrigerant may facilitate temperature control of the refrigerant.
In order to use the combined cooling apparatus of the present invention as a cooler or a heater, the four sides 180 to change the flow of the refrigerant are connected to the refrigerant pipe as shown in the drawing. The four sides 180 may be the same as that used in the prior art, when used as a cooling device according to the electric control signal 150, the high temperature and high pressure gas of the compressor 110 is introduced into the first pipe 181. To the second pipe 182 to send to the outdoor unit 190, and receives the refrigerant from the indoor unit 120 to the fourth pipe 184 to connect to the third pipe (183) to send to the compressor.

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In the case of using a complex air heating device as a heating device, the high temperature and high pressure gas of the compressor 110 introduced into the first pipe line 181 is passed through the fourth pipe line 184 to send the indoor unit 120 to the outdoor unit 120. In order to receive the refrigerant from the second pipe 182 to the compressor 110 to be connected to the third pipe (183).

The operation of the present invention configured as described above will be described. First, the operation of the cooling device in the complex air conditioner will be described.

When operating the complex air-conditioning device of the present invention as a cooling device, the high-pressure refrigerant compressed by the compressor 110 flows to the outdoor unit 190 through the four sides 180 to be condensed while cooling the expansion unit 140 of the liquid phase It passes through the check valve 141 (solenoid valve is closed) and is cooled in the heat exchanger 130 and expanded in the indoor unit 120, and (if the solenoid valve is open, part of the refrigerant is distributed through the capillary tube All the refrigerant except for the fourth capillary tube and the third capillary tube is cooled in the heat exchanger 130 and expanded in the indoor unit 120 to evaporate. At this time, after cooling the indoor air while absorbing the vaporization heat passes through the four sides (180) and a portion of the refrigerant and heat exchanger passing through the fourth capillary tube 144 and the third capillary tube 143 at the inlet of the heat exchanger (130). Joining in the inlet portion is heated by heat exchange with the high temperature refrigerant to enter the compressor 110 to continue the circulation that is compressed and output. Therefore, it operates as a device for cooling the room while continuing heat exchange to absorb the heat of the room and release it to the outside.

In the case of operating with a heating device, the high pressure refrigerant compressed by the compressor 110 flows to the indoor unit 120 through the four sides 180, where the indoor air is heated while heat-exchanging with the indoor air, and the refrigerant itself is condensed while cooling. Passing through the heat exchanger 130 while changing to a liquid phase. As the heat exchanger exchanges with the cold refrigerant, the liquid is completely converted into the liquid state, and the expansion unit 140 passes through the refrigerant pipe 131. In the expansion part, the pressure is reduced in pressure through the first capillary tube 145 in the distribution pipe 142, expands and expands and expands in the expansion pipe 146, and is cooled while being evaporated to exchange heat with the atmosphere in the outdoor unit 190 to become a vaporized state. At this time, there are a plurality of capillaries connecting the distribution pipe 142 and the outdoor unit 190, the flow of the capillaries are controlled by the solenoid valves (152, 153, 154). If all the solenoid valves are open now, the outdoor unit 190 flows through the first capillary tube 145, the second capillary tube 147, the fourth capillary tube 144, and the fifth capillary tube 148. At this time, the refrigerant passing through the solenoid valve 154 also flows to the outdoor unit through the fourth capillary tube 144, but a part thereof is directly connected to the inlet 132 of the heat exchanger 130 through the third capillary tube 143. Bypasses the outdoor unit. The refrigerant vaporized in the outdoor unit 190 flows through the four sides 180 to the pipe 133 and is introduced into the heat exchanger. The temperature of the refrigerant is detected by the temperature sensor 151 installed in the pipe 133 and the solenoid valves are turned on or off or flow is controlled according to a predetermined value according to the temperature of the refrigerant to adjust the amount of refrigerant going to the outdoor unit. do. The refrigerant flowing into the pipe 133 through the four sides is joined with the refrigerant passing through the third capillary tube at the heat exchanger inlet 132, and the compressor is vaporized as it is heated by heat exchange with the high temperature and high pressure refrigerant in the heat exchanger 130. This circulation of the refrigerant causes the outdoor heat to be transferred to the room to warm the indoor air.
At this time, the temperature of the outside air is operated in the same process as the conventional heater up to about 5 degrees below zero, but when the outside temperature drops to about 10 degrees below the minus 15 degrees and below the minus 20 degrees, when the refrigerant circulates through the outdoor unit, Since there is a risk that the operation or failure may occur, the refrigerant temperature of the pipe 133 is detected to adjust the amount of refrigerant going to the outdoor unit. For example, when the outside temperature is about -10 ° C, the fifth capillary tube and the fifth capillary tube solenoid valve 152 are shut off, and the remaining solenoid valves 153 and 154 are opened. When the outside temperature is about -15 ° C, Shut off the solenoid valves 152 and 153 of the second and fifth capillaries and open the solenoid valve 154. When the outside temperature is about -20 ° C, open the solenoid valves 152 and 153 and shut off the solenoid valve 154. By controlling the amount of refrigerant passing through the outdoor unit according to the outdoor temperature, the pressure and temperature of the refrigerant introduced into the compressor are properly adjusted.
In other words, the heat exchanged high temperature low pressure refrigerant (condensing refrigerant) of the heating to increase the air of the room in the indoor unit 120 using the four sides of the high temperature refrigerant compressed by the compressor 110, the heat exchanger 130 It is about 25 ℃, heat exchanged with the low-pressure refrigerant in the pipe 133 and then divided into 5 capillaries in the expansion section 140, of which the check valve 141 line is blocked and the remaining four divided, three capillaries A solenoid valve is installed to adjust the amount of refrigerant entering the outdoor unit in three stages according to the air temperature. In other words, adjust the temperature at -10 ℃, -15 ℃, -20 ℃. After passing through the solenoid valve, it expands into a capillary tube and is mixed in two dispensing portions 146. The second capillary tube 147, the third capillary tube 143, the fourth capillary tube 144, and the fifth capillary tube 148 are tubes for controlling the amount of refrigerant, and are provided with solenoid valves, and the fifth capillary tube is installed at an outdoor unit temperature of -10 ° C. Blocking (148) and blocking the fifth capillary tube 148 and the second capillary tube 147 at -15 ℃, the solenoid valve 154 is blocked at -20 ℃ to the third capillary tube (143), fourth capillary tube ( 144) is also blocked, and the fifth capillary tube 148 and the second capillary tube 147 are opened again so that the heat exchange can be appropriately made according to the change of the atmospheric temperature in the outdoor unit. The solenoid valves 152, 153, and 154 operate by sensing the temperature of the refrigerant heat exchanged in the outdoor unit by the temperature sensor 151. For example, when the outside air temperature is about -10 ° C, the solenoid valve 152 is shut off, and the remaining solenoid valves 153 and 154 are opened. When the outside air temperature is about -15 ° C, the solenoid valves 152 and 153 are shut off and the solenoid When the valve 154 is opened and the outside temperature is about -20 ° C, the solenoid valves 152 and 153 are opened and the solenoid valve 154 is shut off to sense the temperature change of the pipe 133 according to the outdoor temperature. The controller 150 automatically adjusts the temperature of the refrigerant sucked into the compressor. Here, the refrigerant passing through the bypass passage 143 of the refrigerant bypassing the outdoor unit is mixed with the refrigerant entering the heat exchanger to cool the refrigerant so that the refrigerant temperature after being heated in the heat exchanger is an appropriate temperature and pressure for the input of the compressor. It plays a role.
The refrigerant that is expanded in the outdoor unit and heat exchanged is a low density refrigerant, which is close to the low refrigerant, and the low refrigerant causes damage to the compressor, and the discharge refrigerant temperature of the compressor is high, but the density of the refrigerant is low, resulting in low heating thermal efficiency. Therefore, the high-density refrigerant expanded by the third capillary tube 143 is bypassed to the refrigerant heat-exchanged in the outdoor unit, and mixed in the inlet 132 of the heat exchanger 130 to increase the density of the refrigerant, thereby exchanging heat exchange in the heat exchanger once more. By sending a high density of refrigerant (-12 ℃ to -18 ℃) to the compressor to compress and discharge the refrigerant of high temperature and high pressure to make a lot of heat exchange in the outdoor unit.
In addition, since the refrigerant of the first capillary tube 145, the second capillary tube 147, the fourth capillary tube 144, and the fifth capillary tube 148 of the expansion unit performs a small heat exchange in the outdoor unit, it is effective to prevent the formation of an imagination in the outdoor unit. . The second, third, fourth, and fifth capillaries are the opening and closing of the solenoid valve by the temperature of the refrigerant detected by the pipe 133, and the cooling and heating by adjusting the amount of the refrigerant so that heat exchange can be performed in the outdoor unit according to the change of the atmospheric temperature. Allows the compressor to work at maximum efficiency in both modes. When the outdoor unit is implanted, the system may be reversed for a while to allow the hot compressed refrigerant to flow to the outdoor unit for a while. Looking at the state in which the heating device is operating in the winter weather is about 15 to 20 degrees below zero.
The refrigerant is at a pressure of 14 atm (100 degrees Celsius or less) at the compressor outlet, about 25-30 degrees at the outlet of the indoor unit, and about 21 degrees below zero at the outlet of the outdoor unit, and is sucked into the compressor after heat exchange by the heat exchanger 130. The previous refrigerant temperature should be about 15 degrees below zero.

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In this embodiment, the number of capillaries in the inflation portion is five, but when the number of capillaries is increased to n, the adjustment stage of the refrigerant flowing to the outdoor unit can be further subdivided, so that it is easy to adapt to the external temperature and can be set to an optimal state. . In other words, it can be set to the temperature conditions of each part that can maximize the heating capacity according to the outside temperature. In addition, even if the capillary water is used as two, there is a limit of proper control. In addition, the heat exchanger 130 can operate by placing an expansion unit in the pipe connecting the indoor unit and the outdoor unit, but the heating efficiency is low. The expansion unit is controlled by the combination of the capillary tube and the solenoid valve as in the present invention, but using a valve-type expander used in the refrigeration field may be controlled in an analog manner to adjust the expansion degree of the refrigerant in accordance with the ambient temperature In addition, it is recommended to control the refrigerant inlet temperature of the refrigerant by using a circuit bypassing the outdoor unit.

According to the present invention described above can solve the problem that the compressor does not operate properly or the outdoor unit is not working properly when the conventional complex air conditioner is used as a heater, and when the temperature is high, it becomes an efficient heater and is below 20 degrees Celsius. It is possible to operate enough as a heater even in the weather.

In the present invention, the expander is connected to a plurality of capillaries in parallel to simplify the control accordingly according to the external temperature increases the reliability of failure and operation.

Claims (8)

A compressor that extrudes the refrigerant at high temperature and high pressure, an indoor unit that heats indoor air by heat-exchanging the refrigerant compressed to high temperature and high pressure in the compressor, and an expansion unit that expands the high pressure refrigerant passing through the indoor unit, and the expansion. The outdoor unit heats the refrigerant by passing through the heat exchanger and heats the expanded low-temperature refrigerant and the outside air, and the heat exchanger heat-exchanges the high-pressure refrigerant heat-exchanged by the expanded refrigerant heated in the outdoor unit and the compressor and is passed through the indoor unit. In the heating device provided, the expansion unit, A distribution pipe connected to the refrigerant pipe passing through the heat exchanger; An expansion pipe portion whose one end is connected to the refrigerant inlet of the outdoor unit; Heating device characterized in that it comprises a plurality of capillary set connecting the distribution pipe and the expansion pipe portion The method according to claim 1, The capillary set includes two or more capillaries, Connecting the other end of the first capillary and the expansion part of the capillary assembly, Installing a solenoid valve for controlling the flow of the refrigerant in the second capillary tube of the capillary assembly, and connects the other end and the expansion pipe, The solenoid valve for controlling the flow of the refrigerant is installed in the third capillary tube of the capillary assembly, the other end is connected to the refrigerant inlet of the heat exchanger, And a temperature sensor for detecting a temperature of the refrigerant introduced into the heat exchanger or the compressor, and having a controller for generating a signal for controlling the refrigerant flow of the solenoid valve according to the temperature detected by the temperature sensor. Device. The method according to claim 2, And a fourth capillary tube for connecting the refrigerant passing through the solenoid valve for controlling the flow of the refrigerant in the third capillary tube to the expansion pipe portion. The method according to claim 1, The heat exchanger further comprises a passage for flowing a heat medium for heating or cooling the refrigerant. It is installed inside the compressor to extrude the refrigerant at high temperature and high pressure, and when it is cooled, it heats the expanded low-temperature expanded refrigerant and indoor air to cool the indoor air. An indoor unit that heats indoor air, an outdoor unit that heats the high temperature and high pressure refrigerant introduced during cooling to release heat into the atmosphere, and an outdoor unit that heats the refrigerant by heat-exchanging the introduced expanded refrigerant and external air during heating, and enters the compressor. In the complex cooling and heating device comprising a heat exchanger for heating or cooling the refrigerant to be heat-exchanged with each other, the refrigerant being compressed and drawn out by the compressor and the other heating means or cooling means, An expansion unit installed at an inlet of the outdoor unit through which the refrigerant passing through the heat exchanger flows to the outdoor unit, and the heat exchanger; The first expansion portion, A check valve allowing only a flow of the refrigerant passing through the outdoor unit to the heat exchanger; A distribution pipe connected to the refrigerant pipe passing through the heat exchanger; An expansion pipe portion whose one end is connected to the refrigerant inlet of the outdoor unit; Complex heating and cooling device characterized in that it comprises a plurality of capillary set connecting between the distribution pipe and the expansion pipe The method according to claim 6, The capillary set includes two or more capillaries, The first capillary tube of the capillary assembly connects the distribution tube and the expansion tube, The second capillary tube of the capillary assembly is connected to the expansion pipe through the solenoid valve for controlling the flow of the refrigerant in the distribution pipe, It is connected to the refrigerant inlet of the heat exchanger through a solenoid valve for controlling the flow of the refrigerant in the distribution pipe to the third capillary tube of the capillary assembly, And a temperature sensor for detecting a temperature of the refrigerant introduced into the heat exchanger, and having a controller for generating a signal for controlling the refrigerant flow of the solenoid valves according to the temperature detected by the temperature sensor. . A compressor that extrudes the refrigerant at high temperature and high pressure, an indoor unit that heats indoor air by heat-exchanging the refrigerant compressed to high temperature and high pressure in the compressor, and an expansion unit that expands the high pressure refrigerant passing through the indoor unit, and the expansion. In the air-conditioning device including an outdoor unit that passes through the heat and heat the refrigerant by expanding the low-temperature refrigerant and the outdoor air, And a refrigerant bypass passage configured to bypass a portion of the refrigerant that has passed through the indoor unit to pass through the outdoor unit and the refrigerant that has passed through the outdoor unit before being introduced into the compressor. The method according to claim 7, And a heat exchanger configured to perform heat exchange between the refrigerant passing through the outdoor unit and the refrigerant passing through the indoor unit. The bypass passage is a cooling and heating device comprising a capillary tube and a control valve for connecting between the refrigerant outlet passing through the heat exchanger and the refrigerant passage passing through the outdoor unit and entering the heat exchanger.

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