KR20010007802A - Regeneration-compound cycle cooling and heating system - Google Patents

Abstract

PURPOSE: A cooling/heating system with regenerative compound cycle is provided to increase the utilization ratio of waste heat discharged from an indoor apparatus after heating a room by constituting the system to have a waste heat exchanger consisting of capillaries so as to increase heat exchange efficiency. The cooling/heating system is also provided to prevent piping from being broken down owing to the obstruction of piping and to prevent a compressor from being failed owing to the overload of the compressor by providing bypass circuits in the waste heat exchanger. In addition, the cooling/heating system is provided to make the switching of a cooling and heating modes positively with single drive source and to simplify piping by integrally constituting the respective valves for switching the cooling and heating modes. CONSTITUTION: A cooling/heating system with regenerative compound cycle comprises a compressor(10); an outdoor apparatus(30); an indoor apparatus(20); a cooling/heating selection valve(61); a cooling waste heat exchanger consisting of a coiled compound heat exchanger(41) and an expansion member(42), such that the coolant that is cooled in the outdoor apparatus(30) and then supplied to the indoor apparatus(20) upon cooling mode is cooled by using the waste heat of the coolant discharged from the indoor apparatus(20); a hating waste heat exchanger consisting of a coiled compound heat exchanger(51) and an expansion member(52), such that the refrigerant that is supplied to the compressor(10) from the outdoor apparatus(30) upon heating mode is hated by using the waste heat of the refrigerant discharged from the indoor apparatus(20); a cooling waste heat emitting line(81); a cooling waste heat absorbing line(82); a heating waste heat emitting line(83); a heating waste heat absorbing line(84); a waste heat emitting line selection valve(62); a waste heat absorbing selection valve(63); a cooling bypass(71) connected from the cooling waste heat emitting line(81) to the cooling waste heat absorbing line(82) and operated in connection with a temperature of a temperature sensor(90) provided in the compressor(10); and a heating bypass(72) connected from the heating waste heat emitting line(83) to the heating waste heat absorbing line(84) and operated in connection with a temperature of the temperature sensor(90) provided in the compressor(10), wherein the cooling/heating selection valve(61), the waste heat emitting line selection valve(62), and the waste heat absorbing selection valve(63) are operated by single drive member(64).

Description

Regeneration-compound cycle cooling and heating system

The present invention relates to a regenerative combined cycle cooling and heating system, and more particularly, to increase heat exchange efficiency by providing a waste heat exchanger made of capillary tubes to increase utilization rate of waste heat discharged from an indoor unit after cooling and heating. Bypass circuit is installed in the waste heat exchanger to prevent breakage of the pipe due to blockage or overload of the compressor, and for other purposes, each valve is integrally formed for switching heating and cooling. In order to make the switching of air conditioning and heating to a single drive source clearly and to simplify the piping.

In general, air conditioners are used to reduce the temperature of the room cooling in a hot season such as summer to secure a comfortable indoor environment, and use heating devices to secure a comfortable indoor environment by increasing the temperature of room cooling in the cold season such as winter. have.

On the other hand, in each home, office, or factory, air conditioners and heating devices are provided and used separately. However, in recent years, air conditioning and heating can be selectively used as needed. The use is increasing.

In general, the air-conditioning device as described above is provided with a heater for heating the refrigerant or a separate burner in the conventional air-conditioning device, but can be selectively used according to the season, the conventional air-conditioning as described above Since the device should be provided with a separate heater or burner, there was a problem that the efficiency is rapidly lowered in the heating process.

Accordingly, a cooling and heating system has been developed and used to increase the cooling and heating efficiency by utilizing the waste heat of the refrigerant discharged to the indoor unit.

The air conditioning and heating system with the above-mentioned utilization rate of waste heat is an indoor and outdoor unit installed indoors, an outdoor unit installed outdoors, a compressor for pumping refrigerant, and heat exchange with waste heat discharged from the indoor unit to improve cooling and heating ability. It is composed of a plurality of valves for controlling the flow of the refrigerant in accordance with the exchange unit, the heating waste heat exchange unit and air conditioning.

Conventional cooling and heating system as described above is cooled by using the waste heat of the refrigerant that is pumped in the compressor and cooled in the outdoor unit during the cooling operation by using the waste heat of the refrigerant discharged from the indoor unit in the air conditioning waste heat exchanger to maximize the temperature of the refrigerant supplied to the indoor unit to the maximum It is lowered to improve the cooling efficiency.In the heating operation, it absorbs the heat from the outside to the compressor and heats it again by using the waste heat of the refrigerant discharged from the indoor unit in the heating waste heat exchanger to supply it to the compressor. By increasing the temperature of the supplied refrigerant to increase the temperature of the refrigerant discharged from the compressor to the maximum to improve the heating efficiency.

However, the conventional air-conditioning system using waste heat as described above is composed of only one waste heat exchange unit using waste heat discharged from the indoor unit, so that the utilization rate of waste heat decreases and the temperature of the air discharged to the indoor unit due to cooling or heating is satisfactory. There was a problem that could not be.

In addition, there is a problem that the bypass pipe is not formed on the air-conditioning line due to the blockage of the pipe, and thus, when the pipe is blocked, damage to the system or failure of the compressor may occur.

In addition, since the heat exchange tube in the waste heat exchanger is composed of only one pipeline, the flow rate of the refrigerant is reduced, thereby causing an excessive load on the compressor, and the circulation speed of the refrigerant per unit time is lowered, thereby lowering cooling and heating efficiency. There was a problem.

In addition, the conventional air-conditioning system as described above is configured so that a plurality of valves for switching the air conditioning is operated by a drive source that receives a signal independently of each other, the operation is not made uniformly, the failure of some valve drive source or When the signal line is damaged, there is a problem that the switching of cooling and heating is not made clearly, causing problems such as system failure, and because the valve is distributed, the pipeline is complicated and the production cost is increased.

Accordingly, the present invention has been made to solve the above problems, to increase the utilization rate of the waste heat discharged from the indoor unit after heating and cooling having an expansion portion made of a bar-shaped capillary tube, the bypass circuit on the pipeline to block the pipeline, etc. It is possible to prevent the damage of the pipe due to or the overload of the compressor, and to form the respective valves for the switching of cooling and heating integrally is to switch the heating and cooling to one drive source.

1 is in the heating and cooling system according to the present invention

Main configuration showing cooling operation.

2 is in the heating and cooling system according to the present invention

Major diagram showing heating operation status.

3 is a perspective view showing an embodiment of a valve according to the present invention.

Figure 4 is an exploded perspective view of the coil-type composite heat exchanger according to the present invention.

5 is an exploded perspective view of the inflation portion according to the present invention.

<Explanation of symbols for main parts of drawing>

10: compressor 20: indoor unit 30: outdoor unit

41, 51: coil type composite heat exchanger

41a, 51a: housing 41b, 51b: coil type heat exchange tube 41c, 51c: bar capillary tube

42,52: inflation

42a, 52a: expansion tube 42b, 52b: bar capillary tube

43: cooling heat exchange promoting unit 53: heating heat exchange promoting unit

61: air conditioner selection valve 62: heat radiation line selection valve

63: endothermic line selection valve 64: drive unit

71: cooling bypass section 72: heating bypass section

71a, 72a: solenoid valve 71b, 72b: cooling section

81: cooling waste heat radiation line 82: cooling waste heat absorption line

83: heating waste heat radiation line 84: heating waste heat absorption line

90: temperature sensor

Hereinafter, described in detail by the accompanying drawings as follows.

The present invention is to increase the utilization of waste heat to improve the cooling efficiency, to configure the bypass circuit to ensure the safety of the system, and to switch the cooling and heating to be made clearly, indoor unit, outdoor unit installed outdoors And a compressor for pumping refrigerant, a cooling waste heat exchanger for improving heat and cooling performance by heat exchange with the waste heat discharged from the indoor unit, and a plurality of valves for controlling the flow of refrigerant according to the heating waste heat exchanger and cooling and heating. In a cooling and heating system; A compressor 10 for pumping refrigerant, an outdoor unit 30 for cooling the refrigerant introduced through heat exchange with outdoor air during cooling, and an outdoor unit 30 for heating the refrigerant introduced through heat exchange with outdoor air during heating, and cooling The city cools the indoor air through heat exchange with the introduced refrigerant, and the indoor unit 20 heats the indoor air through the heat exchange with the introduced refrigerant, and the indoor unit 20 and the outdoor unit (from the compressor 10). The cooling and cooling selection valve 61 to control the refrigerant flow to the 30 to selectively perform the heating and cooling, and the refrigerant that is cooled in the outdoor unit 30 and supplied to the indoor unit 20 when the cooling is discharged from the indoor unit 20 Cooling waste heat exchanger consisting of a coil-type composite heat exchanger 41 and an expansion unit 42 to cool by using waste heat, and the refrigerant supplied from the outdoor unit 30 to the compressor 10 during heating, Use waste heat Heating waste heat exchanger consisting of a coil-type composite heat exchanger 51 and the expansion unit 52, the cooling waste heat radiation line 81 formed of the indoor unit 20 in the outdoor unit 30 during cooling, and the indoor unit during cooling ( Cooling waste heat absorption line 82 formed by the outdoor unit 30 in the 20, and heating waste heat radiation line 83 formed as the outdoor unit 30 in the indoor unit 20 when heating, and the compressor in the outdoor unit 30 during heating A heating waste heat absorption line 84 formed of (10), a waste heat radiation line selection valve 62 for selectively controlling a refrigerant flow of the cooling waste heat radiation line 81 and the heating waste heat radiation line 83 according to air conditioning; The waste heat absorption line selection valve 63 for selectively controlling the refrigerant flow of the cooling waste heat absorption line 82 and the heating waste heat absorption line 84 according to the cooling and heating, and the cooling waste heat absorption line 82 from the cooling waste heat radiation line 81. Cooling bypass unit 71 is provided to be connected to operate in conjunction with the temperature of the temperature sensor 90 provided in the compressor (10) ), And the heating bypass unit 72 is provided to be connected to the heating waste heat absorption line 84 in the heating waste heat radiating line 83 to operate in conjunction with the temperature of the temperature sensor 90 provided in the compressor.

Here, the air-conditioning selection valve 61, the waste heat dissipation line selection valve 62, and the waste heat absorption line selection valve 63 are integrally formed so that the valve shaft is coaxial and operated by a conventional controller 64. It is configured to operate by).

In addition, the coiled composite heat exchanger (41, 51) of the cooling waste heat exchanger and the heating waste heat exchanger includes a housing (41a, 51a) through which the refrigerant of the waste heat absorption lines (83, 81) passes, and the housing (41a, 51a). ) Is provided with one or more coil type heat exchange tubes (41b, 51b) through which the refrigerant of the waste heat radiation lines (84, 82) passes, and a plurality of bar heat exchange tubes (inside and outside) of the coil type heat exchange tubes (41b, 51b). It can implement with 41c and 51c.

In addition, the expansion portion (42, 52) of the cooling waste heat exchanger and the heating waste heat exchanger is an expansion pipe (42a, 52a) through which the refrigerant of the waste heat absorption line (83, 81) passes, and the expansion pipe (42a, 52a) At least one bar capillary tube (42b, 52b) through which the refrigerant in the waste heat radiation lines (84, 82) passes, but it is preferable to form and to maximize the refrigerant and the receiving area of the waste heat absorption lines (83, 81). .

In addition, the cooling bypass unit 71 and the heating bypass unit 72 are connected to the solenoid valve 71a operated by the temperature sensor 90 of the compressor 10 and the refrigerant passing through the solenoid valve 71a. It consists of a cooling part 71b which consists of a plurality of capillaries for cooling.

On the other hand, in the embodiment of the present invention, the heat exchanger tube inside the housing 41a by cooling through the heat exchanger for cooling the refrigerant in the outlet side of the cooling-type heat exchanger 41 of the coil-type composite heat exchanger 41 of the air conditioning waste heat exchanger ( And a cooling heat exchange facilitating unit 43 for spraying 41b and 41c to cool the refrigerant in the heat exchange tubes 41b and 41c, and the heat discharging heat dissipation line at the outlet side of the coil type heat exchange unit 51 of the heat dissipating heat exchanger. And a heating heat exchange facilitator 53 for cooling the refrigerant in the heat exchanger pipes 51b and 51c by cooling the refrigerant in the heat exchanger pipes 51b and 51c in the housing 51a. It can be carried out to improve the cooling efficiency of the refrigerant during heating and cooling.

Hereinafter, the cooling process and the heating process according to the present invention will be described.

As described above, the indoor unit 20, the outdoor unit 30, the cooling and heating selection valve 61, the cooling and heating waste heat exchanger, the cooling and heating waste heat radiating lines 81 and 83, and the cooling and heating waste heat absorption line 82 84), the air-conditioning line selection valves 62 and 63 and the cooling and heating bypass unit 72 is described as follows.

When the cooling is selected by a general controller, the controller controls the drive unit 64 so that the system is operated by cooling, the cooling and heating selection valve 61, the waste heat radiation line selection valve 62, and waste heat absorption The line select valve 63 is switched to the cooling state.

When the system is operated in a state in which the valves 61, 62, and 63 are switched to the cooling state as described above, the refrigerant compressed in the compressor 10 is supplied to the outdoor unit 30 through the air conditioner selection valve 61 to be outdoors. The refrigerant cooled through a heat exchange process with air, and the refrigerant cooled in the outdoor unit 30 passes through the air-cooled heat-dissipation line 81 and the coil-type heat exchange tube 41b and the air-cooled heat-dissipation line 41 of the coil-type composite heat exchanger 41. Expansion of the expansion portion 42 through the cooling waste heat absorption line 82 in the indoor unit 20 through the waste heat radiation line selection valve 62 and the bar capillary tube 42b of the expansion portion 42 having an open side (81). The tube 42a is cooled through a heat exchange process between the refrigerant supplied to the compressor 10 through the housing 41a of the coil type heat exchange part 41, and the coil type heat exchange part 41 and the expansion part ( The refrigerant cooled in 42 is changed to indoor air through heat exchange with indoor air in the indoor unit 20. Each would be pleasant to keep the indoor environment.

As described above, the refrigerant that cools the indoor air through the heat exchange process with the indoor air in the indoor unit 20 is cooled through the heat absorption line selection valve 63 in which the cooling waste heat absorption line 82 is opened. And is diffused in the expansion pipe 42a of the expansion portion 42 on the cooling waste heat absorption line 82 and passes through the bar capillary pipe 42b to absorb heat emitted from the refrigerant supplied to the indoor unit 20, After entering the housing 41a of the coil type heat exchange part 41 through the cooling and heat absorbing heat absorbing line 82, it diffuses again and absorbs the heat emitted from the refrigerant passing through the coil type heat exchange pipe 41b, and then the compressor 10. ), One cycle for cooling is completed.

Hereinafter, the heating process using the present invention will be described.

When the heating is selected by a conventional controller, the controller controls the drive unit 64 so that the system is operated by heating, the air conditioning heating valve 61, the waste heat radiation line selection valve 62, and the waste heat absorption The line selection valve 63 is switched to the heating state.

As described above, when the system is operated in a state in which the valves 61, 62, and 63 are switched to a heating state, the refrigerant compressed by the compressor 10 is supplied to the indoor unit 20 through the air-conditioning selection valve 61 to be indoors. Heat indoor air through heat exchange process with air to keep indoor environment pleasant.

As described above, the refrigerant that heats the indoor air in the indoor unit 20 to keep the indoor environment comfortable is discharged to the heating waste heat radiation line 83 in a state where the temperature is lowered, and to the heating waste heat radiation line 83. The supplied coolant is a bar-shaped capillary tube of the coil-type heat exchange tube 51b of the coil-type composite heat exchanger 51 and the waste heat-dissipation line selection valve 62 with the heating waste heat dissipation line 83 side open and the expansion unit 52. 52b) from the outdoor unit 30 to the compressor 10 through the heating waste heat absorption line 84 through the expansion pipe 52a of the expansion unit 52 and the housing 51a of the coil-type composite heat exchange unit 51. The refrigerant is supplied to the compressor 10 in a heated state through a heat exchange process with the supplied refrigerant, and the refrigerant supplied from the coil-type composite heat exchange part 51 and the expansion part 52 to the compressor 10 is supplied to the compressor 10. The heated refrigerant is heated by the heat exchange process with the outdoor air in the outdoor unit (30). All.

As described above, the refrigerant heated in the outdoor unit 30 through the heat exchange process with the outdoor air is expanded on the heating waste heat absorption line 84 through the waste heat radiation line selection valve 62 in which the heating waste heat absorption line 84 is open. The expansion pipe 52a of the unit 52 and the housing 51a of the coil-type composite heat exchange unit 51 are diffused and the coil of the bar capillary tube 52b of the expansion unit 52 and the coil-type composite heat exchange unit 51. After passing through the heat exchange tube (51b) to absorb the heat emitted from the refrigerant supplied to the outdoor unit 30 is supplied to the compressor 10 in a heated state is to complete one cycle for heating.

On the other hand, in the operation of the system of the present invention, if the compressor 10 is heated by the pressure rise in the pipeline due to the blockage of the pipe, etc., the temperature sensor 90 provided in the compressor 10 detects this condition of cooling and heating. Accordingly, the solenoid valves 71a and 72a of the cooling and heating bypass unit 72 are operated so that the refrigerant on the waste heat radiation lines 81 and 83 is directly bypassed to the waste heat absorption lines 82 and 84, thereby providing a compressor (10). This protects against damage due to overload.

At this time, in the process of bypassing the refrigerant to the waste heat absorbing line (82,84), the high temperature refrigerant is cooled in the cooling unit (71b, 72b) consisting of a plurality of capillaries bypassed to increase the temperature of the compressor temperature To quickly return to a stable state.

Therefore, the present invention is provided with an expansion unit to efficiently utilize the waste heat of the refrigerant that heat exchanges to the outdoor unit on the air conditioning system, and the heat exchange tube of the coil type heat exchange part is composed of a plurality of coil type heat exchange tubes and bar type heat exchange tubes. Increasing the utilization rate of the system maximizes the heating and cooling efficiency.

In addition, by providing a bypass unit connected from the waste heat radiating line to the waste heat absorbing line and providing a cooling unit in the bypass unit, the compressor is prevented from being damaged due to the blockage of the pipe in the operation of the system, thereby securing the safety of the system. will be.

In addition, by controlling a single controller by a single controller, the air-conditioning selection valve for switching air-conditioning, the waste heat absorption line selection valve and the waste heat radiation line selection valve are integrally formed on the air-conditioning system. Through the switching of the cooling and heating is made clearly and because each line does not have a separate valve, the line of the pipeline is simplified, it is very useful that the compaction of productivity and production source and scale.

Claims (4)

The indoor unit, the outdoor unit installed outdoors, the compressor for pumping the refrigerant, the cooling and waste heat exchanger to improve the cooling and heating ability by heat exchange with the waste heat discharged from the indoor unit, and the refrigerant flow in accordance with the heating waste heat exchanger and air conditioning A conventional heating and cooling system composed of a plurality of valves for controlling; A compressor 10 for pumping the refrigerant; An outdoor unit 30 that cools the refrigerant introduced through heat exchange with the outdoor air during cooling and heats the refrigerant introduced through heat exchange with the outdoor air during heating; An indoor unit 20 for cooling indoor air through heat exchange with the introduced refrigerant during heating and heating the indoor air through heat exchange with the introduced refrigerant; A cooling and heating selection valve 61 for controlling the refrigerant flow from the compressor 10 to the indoor unit 20 and the outdoor unit 30 to selectively perform cooling and heating; Cooling consisting of a coil-type composite heat exchanger 41 and an expansion unit 42 for cooling the refrigerant supplied from the outdoor unit 30 to the indoor unit 20 by cooling using the waste heat of the refrigerant discharged from the indoor unit 20 during cooling. A waste heat exchanger; A heating waste heat exchanger consisting of a coil-type composite heat exchanger 51 and an expansion unit 52 for heating the refrigerant supplied from the outdoor unit 30 to the compressor 10 by heating using waste heat of the refrigerant discharged from the indoor unit; Cooling closed heat radiation line (81) formed from the outdoor unit (30) to the indoor unit (20) during cooling; Cooling waste heat absorption line 82 formed from the indoor unit 20 to the outdoor unit 30 at the time of cooling; A heating waste heat radiation line 83 formed from the indoor unit 20 to the outdoor unit 30 during heating; Heating waste heat absorption line 84 formed by the compressor 10 in the outdoor unit 30 during heating, A waste heat radiation line selection valve 62 for selectively controlling the refrigerant flow of the cooling waste heat radiation line 81 and the heating waste heat radiation line 83 according to air conditioning; A waste heat absorption line selection valve 63 for selectively controlling a refrigerant flow of the cooling waste heat absorption line 82 and the heating waste heat absorption line 84 according to air conditioning; A cooling bypass unit 71 provided to be connected to the cooling waste heat dissipation line 82 in the cooling waste heat dissipation line 81 and operated in conjunction with the temperature of the temperature sensor 90 provided in the compressor 10; The heating bypass heat dissipation line 83 is provided to be connected to the heating waste heat absorption line 84 is composed of a heating bypass unit 72 which operates in conjunction with the temperature of the temperature sensor 90 provided in the compressor, The air-conditioning selection valve 61, the waste heat dissipation line selection valve 62, and the waste heat absorption line selection valve 63 are integrally formed so that the valve shaft is coaxial to one drive unit 64 operated by a conventional controller. Regenerated composite cycle cooling and heating system, characterized in that configured to operate by. The method of claim 1; The coiled composite heat exchanger (41, 51) of the cooling waste heat exchanger and the heating waste heat exchanger has a housing (41a, 51a) through which the refrigerant of the waste heat absorption lines (83, 81) passes and waste heat to the housing (41a, 51a). One or more coil type heat exchange tubes (41b, 51b) through which the refrigerant in the heat dissipation lines (84, 82) passes, and includes a plurality of bar heat exchange tubes (41c) inside and outside the coil type heat exchange tubes (41b, 51b). 51c), and The expansion parts 42 and 52 of the cooling waste heat exchanger and the heating waste heat exchanger are provided with expansion pipes 42a and 52a through which refrigerant in the waste heat absorption lines 83 and 81 pass and waste heat radiation to the expansion pipes 42a and 52a. And at least one bar capillary tube (42b, 52b) through which refrigerant in lines (84, 82) pass. The method of claim 1; The cooling bypass unit 71 and the heating bypass unit 72 cool the refrigerant passing through the solenoid valve 71a and the solenoid valve 71a operated by the temperature sensor 90 of the compressor 10. Regenerated composite cycle cooling and heating system, characterized in that consisting of a cooling portion (71b) consisting of a plurality of capillaries for. The method of claim 1; Cooling through the heat exchanger for cooling the refrigerant in the outlet side of the cooling type heat exchanger 41 of the coil-type composite heat exchanger 41 of the air-cooled heat exchanger 41 and spraying the heat exchanger pipes (41b, 41c) inside the housing (41a) It is provided with a cooling heat exchange promoting section 43 for cooling the refrigerant in the pipes (41b, 41c), Cooling through the heat exchanger for cooling the refrigerant in the outlet side heating waste heat radiation line 83 of the coil-type composite heat exchanger 51 of the shield heat exchanger, sprayed onto the heat exchanger pipes 51b and 51c inside the housing 51a to heat the heat exchanger tube. A regenerative combined cycle cooling and heating system, comprising: a heating heat exchange promoting section (53) for cooling a refrigerant of (51b, 51c).