Mixed heat exchange system of air conditioner

Abstract

The air conditioner mixed heat exchange system comprises a main reversing valve, a first plate heat exchanger, a second plate heat exchanger and an air heat exchange mechanism, an A1 port of the main reversing valve is connected with a compressor, an A2 port of the main reversing valve is connected with the air heat exchange mechanism, an A3 port of the main reversing valve is connected with a gas-liquid separator, and the gas-liquid separator is connected with the compressor. The A4 port is connected with a second plate heat exchanger, the air heat exchange mechanism is connected with a thermostatic expansion valve, the thermostatic expansion valve is connected with the second plate heat exchanger, and the second plate heat exchanger is connected with an indoor duct type air conditioner through a second variable frequency pump. An air-conditioning medium needing to be cooled or heated is subjected to temperature regulation through an air heat exchange mechanism with less energy consumption, and then is further subjected to temperature regulation through a plate heat exchanger for transduction by using geothermal energy or a cooling tower, so that the air heat exchange mechanism and the plate heat exchanger are combined for application; the relative temperature difference between the air-conditioning medium and the set air-conditioning temperature can be reduced, the output power of an air-conditioning compressor is reduced, and energy conservation is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, and in particular to an air conditioning hybrid heat exchange system. Background Art

[0002] Shallow geothermal resources on the surface can be called geothermal energy, which refers to the low-temperature heat energy stored in the surface soil, groundwater or rivers and lakes by absorbing solar energy and geothermal energy. The shallow surface is a huge solar collector. It is not limited by regions and resources, and is truly large in quantity and ubiquitous. This almost unlimited renewable energy stored in the shallow surface makes geothermal energy a form of clean renewable energy.

[0003] Ground source heat pump air conditioner or water-cooled air conditioner unit technology is an efficient and energy-saving device that uses shallow underground geothermal resources (including groundwater, underground rock and soil or surface water, etc.) to provide both heating and cooling. Among them, the buried pipe ground source heat pump system is less restricted by environmental conditions, and is therefore increasingly valued. It uses the relatively stable temperature of underground soil. On the basis of a small amount of high-potential energy, it exchanges heat and cold with the earth through the buried pipe heat exchanger buried underground, achieving summer cooling, winter heating, and domestic hot water. Compared with conventional central air conditioners, the effect is more stable. Only a small amount of electrical energy output can realize the conversion from low-potential energy to high-potential energy, which is cleaner and more environmentally friendly, and can realize cooling, floor heating and domestic hot water supply. One machine has multiple uses, stable performance, and long service life.

[0004] The existing ground source heat pump air conditioning system completes energy transfer in the heat exchanger through the air conditioning medium and the heat exchange medium. For example, under the premise of using groundwater as the heat exchange medium, when the temperature of the air conditioning medium is high or low, the heat exchange process of the air conditioning medium requires the input of a higher flow of heat exchange water and a longer well. Other cooling media as heat exchange media also have similar problems. These problems will lead to a high overall energy consumption of the ground source heat pump air conditioning system and insufficient energy saving. The water-cooled unit also has the above problems.

[0005] Therefore, how to provide an air-conditioning heat exchange system that can reduce energy consumption is a technical problem that urgently needs to be solved in the current air-conditioning industry. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an air conditioning hybrid heat exchange system capable of reducing energy consumption.

[0007] In order to achieve the above object, the solution of the present invention is:

[0008] An air conditioning hybrid heat exchange system comprises a main reversing valve, a first plate heat exchanger, a second plate heat exchanger and an air heat exchange mechanism, wherein the main reversing valve is arranged at the rear end of the compressor in the direction of travel of the air conditioning medium, an A1 port is arranged at one end of the main reversing valve to connect to the compressor, and an A2 port, an A3 port and an A4 port are arranged at the other end from left to right, the A2 port of the main reversing valve is connected to the B1 port of the air heat exchange mechanism, the A3 port is connected to the gas-liquid separator, the gas-liquid separator is connected to the compressor, the A4 port is connected to the D2 port of the second plate heat exchanger, and the A1 port is connected to the compressor during cooling. The port is connected to the A2 port, the A3 port is connected to the A4 port. When heating, the A1 port is connected to the A4 port, the A2 port is connected to the A3 port, the B2 port of the air heat exchange mechanism is connected to the C1 port of the first plate heat exchanger, the C2 port of the first plate heat exchanger is connected to the E1 port of the first thermal expansion valve, the first plate heat exchanger is connected to the ground source heat pump air conditioner or the water-cooled air conditioner unit through the first variable frequency pump, the E2 port of the thermal expansion valve is connected to the D1 port of the second plate heat exchanger, and the second plate heat exchanger is connected to the indoor duct unit through the second variable frequency pump.

[0009] Furthermore, the air heat exchange mechanism is provided with a first pipeline, a heat exchange medium flows in the first pipeline, and the flow rate of the heat exchange medium is controlled by a variable frequency pump.

[0010] Furthermore, the air-conditioning hybrid heat exchange system also includes a flow valve arranged between the air heat exchange mechanism and the first plate heat exchanger, the flow valve includes a first flow valve and a second flow valve, the F1 port of the first flow valve is connected to the C1 port of the first plate heat exchanger, the F2 port of the first flow valve is connected to the B2 port of the air heat exchange mechanism, the G1 port of the second flow valve is connected to the A2 port of the main reversing valve, the G2 port of the second flow valve is connected to the B1 port of the air heat exchange mechanism, and the F3 port of the first flow valve is connected to the G3 port of the second flow valve.

[0011] Furthermore, the air-conditioning hybrid heat exchange system also includes a third flow valve and a fourth flow valve, the H1 port of the third flow valve is connected to the C1 port of the first plate heat exchanger, the H2 port is connected to the B2 port of the air heat exchange mechanism, the H3 port is connected to the A2 port of the main reversing valve, the I1 port of the fourth flow valve is connected to the C2 port of the first plate heat exchanger, the I2 port is connected to the B1 port of the air heat exchange mechanism, and the I3 port is connected to the E1 port of the thermal expansion valve.

[0012] Furthermore, the air-conditioning hybrid heat exchange system also includes a third flow valve, the H1 port of the third flow valve is connected to the C1 port of the first plate heat exchanger, the H2 port is connected to the B2 port of the air heat exchange mechanism, the H3 port is connected to the A2 port of the main reversing valve, and the C2 port of the first plate heat exchanger, the B1 port of the air heat exchange mechanism and the E1 port of the thermal expansion valve are connected together.

[0013] Furthermore, the air-conditioning hybrid heat exchange system also includes a fourth flow valve, the I1 port of the fourth flow valve is connected to the C2 port of the first plate heat exchanger, the I2 port is connected to the B1 port of the air heat exchange mechanism, the I3 port is connected to the E1 port of the thermal expansion valve, and the C1 port of the first plate heat exchanger, the B2 port of the air heat exchange mechanism and the A2 port of the main reversing valve are connected together.

[0014] Further, the air-conditioning hybrid heat exchange system is characterized in that it also includes secondary reversing valves, the secondary reversing valves include a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve, the COM port of the first reversing valve is connected to the C1 port of the first plate heat exchanger, the NO port of the first reversing valve is connected to the B2 port of the air heat exchange mechanism, the NC port of the first reversing valve is connected to the NC port of the second reversing valve, the NO port of the second reversing valve is connected to the B1 port of the air heat exchange mechanism, the COM port of the second reversing valve is connected to the A2 port of the main reversing valve, the COM port of the third reversing valve is connected to the C2 port of the first plate heat exchanger, and the CN port of the third reversing valve is connected to the The NC port of the second reversing valve and the COM port of the fourth reversing valve are connected to the E1 port of the thermal expansion valve, the NO port of the first reversing valve is connected to the J1 contact, the J1 contact is connected to the B2 port of the air heat exchange mechanism, the NO port of the first reversing valve and the N0 port of the third reversing valve, the NO port of the fourth reversing valve is connected to the J2 contact, the J2 contact is connected to the B1 port of the air heat exchange mechanism, the NO port of the fourth reversing valve and the NO port of the second reversing valve, the C1 port of the first plate heat exchanger and the A2 port of the main reversing valve are connected through the first reversing valve and the second reversing valve, and the C2 port of the first plate heat exchanger and the E1 port of the thermal expansion valve are connected through the third reversing valve and the fourth reversing valve.

[0015] Furthermore, the air conditioning hybrid heat exchange system further includes a secondary reversing valve, the secondary reversing valve includes a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve, the COM port of the first reversing valve is connected to the C1 port of the first plate heat exchanger, the NO port of the first reversing valve is connected to the F1 port of the first flow valve, the NC port of the first reversing valve is connected to the NC port of the second reversing valve, the NO port of the second reversing valve is connected to the G1 port of the second flow valve, the COM port of the second reversing valve is connected to the A2 port of the main reversing valve, and the The COM port of the valve is connected to the C2 port of the first plate heat exchanger, the CN port of the third reversing valve is connected to the NC port of the fourth reversing valve, the COM port of the fourth reversing valve is connected to the E1 port of the thermal expansion valve, the NO port of the first reversing valve is connected to the J1 contact, the NO port of the fourth reversing valve is connected to the J2 contact, the C1 port of the first plate heat exchanger and the A2 port of the main reversing valve are connected through the first reversing valve and the second reversing valve, and the C2 port of the first plate heat exchanger and the E1 port of the thermal expansion valve are connected through the third reversing valve and the fourth reversing valve.

[0016] Furthermore, the secondary reversing valve also includes a fifth reversing valve and a sixth reversing valve, the COM port of the fifth reversing valve is connected to the C1 port of the first plate heat exchanger, the CN port of the fifth reversing valve is connected to the J1 contact, the J1 contact is connected to the NO ports of the first reversing valve and the third reversing valve; the COM port of the sixth reversing valve is connected to the E1 port of the thermal expansion valve, the NC port of the sixth reversing valve is connected to the J2 contact, and the J2 contact is connected to the NO ports of the second reversing valve and the fourth reversing valve.

[0017] Further, the air conditioning hybrid heat exchange system is characterized in that it also includes secondary reversing valves, which include a seventh reversing valve, an eighth reversing valve, a ninth reversing valve and a tenth reversing valve. The seventh reversing valve is a four-way reversing valve having a K1 port, a K2 port, a K3 port and a K4 port. The eighth reversing valve is a four-way reversing valve having a L1 port, a L2 port, a L3 port and a L4 port. The ninth reversing valve is a two-position two-way valve having a M1 port and a M2 port. The tenth reversing valve is a two-position two-way valve having a N1 port and a N2 port. The K1 port of the seventh reversing valve is connected to the K2 port of the eighth reversing valve. The L1 port of the ninth reversing valve is connected to the J1 contact, the J1 contact is connected to the B2 port of the air heat exchange mechanism, the M1 port of the ninth reversing valve and the N1 port of the tenth reversing valve are connected to the J2 contact, the J2 contact is connected to the B1 port of the air heat exchange mechanism, the K2 port of the seventh reversing valve is connected to the C1 port of the first plate heat exchanger, the K3 port is connected to the A2 port of the main reversing valve, the K4 port is connected to the M2 port of the ninth reversing valve, the L2 port of the eighth reversing valve is connected to the C2 port of the first plate heat exchanger, the L3 port is connected to the E1 port of the thermal expansion valve, and the L4 port is connected to the N2 port of the tenth reversing valve.

[0018] Furthermore, an air-conditioning hybrid heat exchange system of the present invention also includes a second air heat exchange mechanism, which is arranged between the first plate heat exchanger and the thermal expansion valve, the B3 port of the second air heat exchange mechanism is connected to the C2 port of the first plate heat exchanger, and the B4 port of the second air heat exchange mechanism is connected to the E1 port of the thermal expansion valve.

[0019] Furthermore, the air heat exchange mechanism includes a radiator and a blowing structure arranged on one side of the radiator, and the B1 port and the B2 port are arranged on the radiator.

[0020] Furthermore, the second plate heat exchanger is provided with a second temperature sensor for detecting the temperature of the second plate heat exchanger, the air heat exchange mechanism is provided with an outdoor temperature sensor for detecting the external ambient temperature, and the radiator of the air heat exchange mechanism is provided with a radiator temperature sensor for detecting the internal temperature of the radiator.

[0021] Furthermore, a speed regulating component is provided in the air heat exchange mechanism, and the speed regulating component is connected to the control circuit of the blowing structure.

[0022] Furthermore, a frost sensor is provided in the radiator of the air heat exchange mechanism, and a heating component or a heat exchange mechanism for defrosting is provided in the radiator.

[0023] After adopting the above scheme, the air conditioning heat exchange system of the present invention first adjusts the temperature of the air conditioning medium that needs to be cooled or heated and the ambient temperature through an air heat exchange mechanism with less energy consumption, and then further adjusts the temperature through a plate heat exchanger that uses geothermal energy or cooling tower energy conversion. The air heat exchange mechanism is combined with the plate heat exchanger to reduce the relative temperature difference between the air conditioning medium and the set air conditioning temperature, reduce the output power of the air conditioning compressor, and is beneficial to energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic structural diagram of a first embodiment of the present invention.

[0025] Figure 2 FIG. 2 is a schematic structural diagram of a second embodiment of the present invention.

[0026] Figure 3 FIG. 4 is a schematic structural diagram of a third embodiment of the present invention.

[0027] Figure 4 FIG. 4 is a schematic structural diagram of a fourth embodiment of the present invention.

[0028] Figure 5 Schematic diagram of the heating structure of the fourth embodiment of the present invention.

[0029] Figure 6 Schematic diagram of the cooling structure of the fourth embodiment of the present invention.

[0030] Figure 7 FIG. 5 is a schematic structural diagram of a fifth embodiment of the present invention.

[0031] Figure 8 Schematic diagram of the heating structure of the fifth embodiment of the present invention.

[0032] Fig. 9 Schematic diagram of the cooling structure of the fifth embodiment of the present invention.

[0033] Fig.10 FIG. 6 is a schematic structural diagram of a sixth embodiment of the present invention.

[0034] Description of labels:

[0035] Liquid receiver 110 compressor 130 gas-liquid separator 150 thermal expansion valve 180 filter 190

[0036] Main reversing valve 160A1 port 10A2 port 20A3 port 30A4 port 40

[0037] First plate heat exchanger 210 First temperature sensor 211 Second plate heat exchanger 220

[0038] Second temperature sensor 211 First variable frequency pump 230 Ground source heat pump air conditioner or water-cooled air conditioner unit 240

[0039] Air heat exchange mechanism 300 Radiator 310 Air blowing structure 320 Outdoor temperature sensor 330

[0040] Radiator temperature sensor 340 Frost sensor 350 Electric heating rod 370

[0041] First pipeline 360 ​​Frequency conversion pump 380 Fifth temperature sensor 390

[0042] Flow valve 400 First flow valve 410 Second flow valve 420 Third flow valve 430

[0043] Fourth flow valve 440 Indoor air duct unit 500 Air duct unit coil 510 Second variable frequency pump 520

[0044] Second reversing valve 600 First reversing valve 610 Second reversing valve 620 Third reversing valve 630

[0045] Fourth reversing valve 640 Fifth reversing valve 650 Sixth reversing valve 660 Seventh reversing valve 670

[0046] The eighth reversing valve 680, the ninth reversing valve 672, the tenth reversing valve 682. DETAILED DESCRIPTION

[0047] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0048] like Figure 1As shown, a first preferred embodiment of an air conditioning hybrid heat exchange system of the present invention includes a main reversing valve 160, a first plate heat exchanger 210, a second plate heat exchanger 220, and an air heat exchange mechanism 300. The air heat exchange mechanism 300 includes a radiator 310 and a blowing structure 320 arranged on one side of the radiator 310. The blowing structure generates airflow so that the air-conditioning medium circulates in the radiator 310. The radiator 310 contacts the air driven by the blowing structure 320 for heat exchange, so as to realize cooling or heating operation of the air-conditioning medium driven by the air-conditioning compressor. The main reversing valve 160 is connected to the output end of the compressor 130. One end of the main reversing valve 160 is provided with an A1 port 10 connected to the compressor 130, and the other end is provided with an A2 port 20, an A3 port 30 and an A4 port 40 from left to right. The A2 port 20 of the main reversing valve 160 is connected to the radiator B1 port of the air heat exchange mechanism 300, the A3 port is connected to the gas-liquid separator 150, the gas-liquid separator 150 is connected to the input end of the compressor 130, and the A4 port 40 is connected to the D2 port of the second plate heat exchanger 220. When cooling (i.e., cooling), the A1 port is connected to the A2 port, and the A3 port is connected to the A4 port. When hot (i.e., heated), port A1 is connected to port A4, port A2 is connected to port A3, port B2 of the radiator of the air heat exchange mechanism 300 is connected to port C1 of the first plate heat exchanger 210, port C2 of the first plate heat exchanger 210D is connected to port E1 of the thermal expansion valve 180, port E2 of the thermal expansion valve 180 is connected to port D1 of the second plate heat exchanger 220, the first plate heat exchanger is connected to the ground source heat pump air conditioner or the water-cooled air conditioner unit through the first variable frequency pump 230, and the second plate heat exchanger 220 is connected to the air duct coil 510 of the indoor air duct unit 500 through the second variable frequency pump 520.

[0049] The second plate heat exchanger 220 is provided with a second temperature sensor 221 for detecting the temperature of the second plate heat exchanger 220, the air heat exchange mechanism 300 is provided with an outdoor temperature sensor 330 for detecting the external ambient temperature, and the radiator 310 of the air heat exchange mechanism is provided with a radiator temperature sensor 340 for detecting the internal temperature of the radiator.

[0050] The air heat exchange mechanism also includes a first pipeline 360, in which a heat exchange medium flows. A variable frequency pump 380 is provided on the first pipeline 360, and the flow rate of the heat exchange medium is controlled by the variable frequency pump 380. A fifth temperature sensor 390 is provided at the outflow end of the heat exchange medium.

[0051] The air heat exchange mechanism 300 is provided with a speed regulating component, which is connected to the control circuit of the blowing structure 320 to control the operating speed of the blowing structure 320 .

[0052] A frost sensor 350 is disposed in the radiator 310 of the air heat exchange mechanism 300 , and a heating component or a heat exchange mechanism for defrosting is disposed in the radiator 310 .

[0053] Filters 190 are provided at both ends of the thermal expansion valve 180 , and a liquid storage tank 110 is further provided between the thermal expansion valve 180 and the D1 port of the second plate heat exchanger 220 .

[0054] When the air conditioning hybrid heat exchange system of the present invention is heating (i.e., raising the temperature), the A1 port of the main reversing valve 160 is connected to the A4 port, and the A2 port is connected to the A3 port. After the compressor 130 compresses the air conditioning medium, the air conditioning medium is changed from gas to liquid, and the liquid temperature rises; the high-temperature air conditioning medium enters the A4 port 40 through the A1 port 10 of the main reversing valve 160 and reaches the D2 port of the second plate heat exchanger 220, and comes out from the D1 port of the second plate heat exchanger 220, so that the second plate heat exchanger 220 is heated. The temperature of the plate heat exchanger 220 is increased, thereby heating the heat exchange medium flowing through the second plate heat exchanger 220. The high-temperature heat exchange medium is driven by the second variable frequency pump 520 to reach the air duct coil unit 510, so that the temperature of the air duct coil unit 510 is increased, and then the air or other substances in contact with the air duct coil unit 510 are heated to the set temperature; the air conditioning medium passing through the second plate heat exchanger 220 enters the thermal expansion valve 180 from the E2 port of the thermal expansion valve 180 and becomes gas, and the temperature drops. To a lower temperature, the low-temperature gas flows out from the E1 port of the thermal expansion valve 180 and enters the B1 port of the radiator 310 of the air heat exchange mechanism 300. At this time, there is a large temperature difference between the lower temperature air-conditioning medium and the ambient temperature. The air-conditioning medium flows through the air heat exchange mechanism 300 so that the temperature of the air-conditioning medium is close to the ambient temperature; the air-conditioning medium heated by the radiator 310 of the air heat exchange mechanism 300 comes out from the B2 port and enters the C2 port of the first plate heat exchanger 210 and flows through the first plate heat exchanger 210. The heat exchange medium flowing through the first plate heat exchanger 210 is driven by the first variable frequency pump 230 and is heated to a temperature close to that of the underground well through the ground source heat pump air conditioner or the water-cooled air conditioner unit 240; the heated air-conditioning medium flows out from the C1 port of the first plate heat exchanger 210, enters the A2 port of the main reversing valve 160, and then flows through the A3 port and enters the gas-liquid separator 150 to return to the input end of the compressor 130 to continue compression and temperature increase, so that the air-conditioning medium circulates. The air-conditioning medium with a higher temperature is easier to be compressed during the compression process, and the temperature of the air-conditioning medium after compression is also higher, with a higher energy efficiency ratio. A smaller power compressor can be used to reach the temperature required by the indoor duct unit 500, with lower project costs and less power consumption.

[0055] When the frost sensor 350 triggers a frost event, the compressor 130 stops working, and the air heat exchange mechanism 300 is defrosted by the heat exchange medium flowing through the pipeline structure of the air heat exchange mechanism 300. The defrosting can also be performed by heating with the electric heating rod 370. Or the main reversing valve 160 reverses to enter the cooling mode, so that the air heat exchange mechanism 300 is heated to achieve the defrosting effect.

[0056] When the air-conditioning hybrid heat exchange system of the present invention performs cooling (i.e., cooling), the A1 port of the main reversing valve 160 is connected to the A2 port, and the A3 port is connected to the A4 port. After the compressor 130 compresses the air-conditioning medium, the air-conditioning medium changes from gas to liquid, and the temperature of the liquid increases; after the heated air-conditioning medium enters the A2 port 20 through the A1 port 10 of the main reversing valve 160, it enters the air heat exchange mechanism 300 from the B1 port of the air heat exchange mechanism 300. At this time, there is a large temperature difference between the high-temperature air-conditioning medium and the ambient temperature. The air flowing through the air heat exchange mechanism 300 can easily take away heat at a low energy consumption, so that the temperature of the air-conditioning medium drops to a temperature close to the ambient temperature; the cooled air-conditioning medium flows out from the B2 port of the air heat exchange mechanism 300, and then enters the first plate heat exchanger 210 from the C1 port. The low-temperature heat exchange ring medium circulating through the underground well takes away the heat of the first plate heat exchanger 210, and further cools the air-conditioning medium to a temperature close to the underground well. The air conditioning medium cooled by the air heat exchange mechanism 300 reduces the total amount of heat exchanged by the first plate heat exchanger 210, which can reduce the length of the pipeline flowing through the underground well and the number of underground wells, and can also make the air conditioning medium closer to the temperature of the underground well; the air conditioning medium after secondary cooling flows out from the C2 port of the first plate heat exchanger 210, enters the thermal expansion valve 180 from the E1 port to become gas, and the temperature drops to a lower temperature. The air conditioning medium with a lower temperature can take away more heat after becoming gas, thereby improving the energy efficiency ratio of the compressor 130 and reducing the energy consumption of the compressor 130. A compressor 130 with a smaller power can be used to reach the temperature required by the indoor air duct unit 500, with lower engineering cost and less power consumption; the low-temperature air-conditioning medium enters the second plate heat exchanger 220 from the D1 port of the second plate heat exchanger 220 and then exits from the D2 port, so that the second plate heat exchanger 220 is cooled, thereby cooling the heat exchange medium flowing through the second plate heat exchanger 220, and the low-temperature heat exchange medium is driven to the air duct unit coil 510 through the second variable frequency pump 520, so that the air duct unit coil 510 is cooled, and then the air or other substances in contact with the air duct unit coil 510 are cooled to the set temperature; the air-conditioning medium heated by the second plate heat exchanger 220 flows through the A4 port 40 of the main reversing valve 160 back to the A3 port 30 and then back to the input end of the compressor 130. The second plate heat exchanger 220 adjusts the flow rate according to the temperature of the second temperature sensor 221, so that the present invention maintains a low energy consumption.

[0057] like Figure 2 As shown, it is a second preferred embodiment of the air conditioning hybrid heat exchange system of the present invention, which includes a main reversing valve 160, a first plate heat exchanger 210, a second plate heat exchanger 220, an air heat exchange mechanism 300 and a flow valve 400. The flow valve 400 is arranged between the first plate heat exchanger 210 and the air heat exchange mechanism 300, including a first flow valve 410 and a second flow valve 420. The air heat exchange mechanism includes a radiator 310 and a blowing structure 320 arranged on one side of the radiator 310. In this embodiment, the first plate heat exchanger 210 and the hot air heat exchanger 300 are connected to each other. The main reversing valve 160 is arranged at the rear end of the compressor 130 in the direction of travel of the air-conditioning medium. One end of the main reversing valve 160 is provided with an A1 port 10 connected to the compressor 130, and the other end is provided with an A2 port 20, an A3 port 30 and an A4 port 40 from left to right. The A2 port 20 of the main reversing valve 160 is connected to the G1 port of the second flow valve 420, and the A3 port is connected to the gas-liquid separator 150. The gas-liquid separator 150 is connected to the compressor 130. The compressor 130, the A4 port 40 is connected to the D2 port of the second plate heat exchanger 220. When cooling (i.e., cooling down), the A1 port is connected to the A2 port, and the A3 port is connected to the A4 port. When heating (i.e., heating up), the A1 port is connected to the A4 port, and the A2 port is connected to the A3 port. The G2 port of the second flow valve 420 is connected to the B1 port of the radiator 310 of the air heat exchange mechanism 300, and the B2 port of the radiator 310 of the air heat exchange mechanism 300 is connected to the F2 port of the first flow valve 410, and the F1 port of the first flow valve 410 is connected to the first The C1 port of the plate heat exchanger 210, the C2 port of the first plate heat exchanger 210 is connected to the E1 port of the thermal expansion valve 180, and the E2 port of the thermal expansion valve 180 is connected to the D1 port of the second plate heat exchanger 220; the first plate heat exchanger 210 is connected to the ground source heat pump air conditioner or water-cooled air conditioning unit 240 through the first variable frequency pump 230, and the second plate heat exchanger 220 is connected to the air duct coil 510 of the indoor air duct unit 500 through the second variable frequency pump 520, and the F3 port of the first flow valve 410 is connected to the G3 port of the second flow valve 420.

[0058] The air heat exchange mechanism 300 may be provided with a first pipeline 360 ​​, in which a heat exchange medium flows. The flow rate of the heat exchange medium is controlled by a variable frequency pump 380 , and a fifth temperature sensor 390 is provided at the outflow end of the heat exchange medium.

[0059] Among them, the first plate heat exchanger 210 is provided with a first temperature sensor 211 for detecting the temperature of the first plate heat exchanger 210, the second plate heat exchanger 220 is provided with a second temperature sensor 221 for detecting the temperature of the second plate heat exchanger 220, the air heat exchange mechanism 300 is provided with an outdoor temperature sensor 330 for detecting the external ambient temperature, and the radiator 310 of the air heat exchange mechanism 300 is provided with a radiator temperature sensor 340 for detecting the internal temperature of the radiator.

[0060] The air heat exchange mechanism 300 is provided with a speed regulating component, which is connected to the control circuit of the blowing structure 320 to control the operating speed of the blowing structure 320 .

[0061] A frost sensor 350 is disposed in the radiator 310 of the air heat exchange mechanism 300 , and a heating component or a heat exchange mechanism for defrosting is disposed in the radiator 310 .

[0062] Filters 190 are provided at both ends of the thermal expansion valve 180 , and a liquid storage tank 110 is further provided between the thermal expansion valve 180 and the D1 port of the second plate heat exchanger 220 .

[0063] When the air conditioning hybrid heat exchange system of the present invention performs heating (i.e., temperature increase), the high-temperature air conditioning medium enters the A4 port through the A1 port of the main reversing valve 160 and reaches the D2 port of the second plate heat exchanger 220, and comes out from the D1 port of the second plate heat exchanger 220, so that the temperature of the second plate heat exchanger 220 increases, thereby heating the heat exchange medium flowing through the second plate heat exchanger 220, and the high-temperature heat exchange medium is driven by the second variable frequency pump 520 to reach the air duct coil 510, so that the temperature of the air duct coil 510 increases, and then the air or other substances in contact with the air duct coil 510 are heated to the set temperature; the air conditioning medium passing through the second plate heat exchanger 220 is discharged from the thermal expansion valve 180 After the E2 port of the thermal expansion valve 180 enters the thermal expansion valve 180 and becomes gas, the temperature drops to a lower temperature. After the low-temperature gas flows out from the E1 port of the thermal expansion valve 180, it enters the C2 port of the first plate heat exchanger 210 and flows through the first plate heat exchanger 210. The heat exchange medium flowing through the first plate heat exchanger 210 is driven by the first variable frequency pump 230 and its pipeline is heated to a temperature close to that of the underground well through the ground source heat pump air conditioner or the water-cooled air conditioning unit 240; the heated air-conditioning medium flows out from the C1 port of the first plate heat exchanger 210. At this time, the flow direction of the air-conditioning medium can be divided into three types. One is to undergo heat exchange again through the air heat exchange mechanism 300 and flow from the C1 port of the first plate heat exchanger 210. The air-conditioning medium flows out of the first plate heat exchanger 210 from the C1 port, enters the first flow valve 410 from the F1 port of the first flow valve 410, flows out from the F2 port and enters the B2 port of the air heat exchange mechanism 300, flows out from the B1 port and enters the G2 port of the second flow valve 420 after heat exchange in the air heat exchange mechanism 300, and flows out from the G1 port and enters the A2 port of the main reversing valve 160; the second is that the air-conditioning medium flows out of the C1 port of the first plate heat exchanger 210 without passing through the air heat exchange mechanism 300, enters the first flow valve 410 from the F1 port of the first flow valve 410, and then enters the G3 port of the second flow valve 420 from the F3 port of the first flow valve 410; the third is that the air-conditioning medium partially passes through the air heat exchange mechanism 300, Part of the air-conditioning medium flows out of the C1 port of the first plate heat exchanger 210 without passing through the air heat exchange mechanism. After entering the first flow valve 410 from the F1 port of the first flow valve 410, part of it flows out from the F2 port and enters the B2 port of the air heat exchange mechanism 300. After heat exchange in the air heat exchange mechanism 300, it flows out from the B1 port and enters the G2 port of the second flow valve 420. It enters the G3 port of the second flow valve 420 from the F3 port of the first flow valve 410, and then flows from the G1 port of the second flow valve 420 to the A2 port of the main reversing valve 160. After flowing through the A3 port, it enters the gas-liquid separator 150 and returns to the input end of the compressor 130 to continue to be compressed and heated, so that the air-conditioning medium circulates.The air-conditioning medium with a higher temperature is easier to be compressed during the compression process, and the temperature of the air-conditioning medium after compression is also higher, with a higher energy efficiency ratio. A smaller power compressor can be used to reach the temperature required by the indoor duct unit 500, with lower project costs and less power consumption.

[0064] When the frost sensor 350 triggers a frost event, the compressor 130 stops working, and the air heat exchange mechanism is defrosted by the heat exchange medium flowing through the pipeline structure of the air heat exchange mechanism. The electric heating rod 370 can also be used for heating and defrosting. Or the main reversing valve 160 reverses to enter the cooling mode, so that the air heat exchange mechanism is heated to achieve the defrosting effect.

[0065] When the air conditioning hybrid heat exchange system of the present invention performs cooling (i.e., cooling), the A1 port of the main reversing valve 160 is connected to the A2 port, and the A3 port is connected to the A4 port. After the compressor 130 compresses the air conditioning medium, the air conditioning medium is changed from gas to liquid, and the liquid temperature increases; after the high-temperature air conditioning medium enters the A2 port through the A1 port of the main reversing valve 160, it enters the G1 port of the second flow valve 420, flows out from the G2 port into the B1 port of the air heat exchange mechanism 300, and enters the air heat exchange mechanism 300. At this time, the high-temperature air conditioning medium and There is a large temperature difference between the ambient temperature and the air flowing through the air heat exchange mechanism 300 can easily take away heat at a low energy consumption, so that the temperature of the air conditioning medium drops to a temperature close to the ambient temperature; the cooled air conditioning medium flows out from the B2 port of the air heat exchange mechanism 300, enters the first flow valve 410 from the F2 port, and then flows out from the F1 port, and then enters the first plate heat exchanger 210 from the C1 port, and the low-temperature heat exchange ring medium circulating through the underground well takes away the heat of the first plate heat exchanger 210, further cooling the air conditioning medium to a temperature close to the underground well. The air conditioning medium cooled by the air heat exchange mechanism reduces the total amount of heat exchanged by the first plate heat exchanger 210, which can reduce the length of the pipeline flowing through the underground well and the number of underground wells, and can also make the air conditioning medium closer to the temperature of the underground well; the air conditioning medium after secondary cooling flows out from the C2 port of the first plate heat exchanger 210, enters the thermal expansion valve 180 from the E1 port to become gas, and the temperature drops to a lower temperature. After the low-temperature air-conditioning medium becomes gas, it can take away more heat, thereby improving the energy efficiency ratio of the compressor and reducing the energy consumption of the compressor. A compressor with a smaller power can be used to reach the temperature required by the indoor air duct unit 500, with lower engineering cost and less power consumption; the low-temperature air-conditioning medium enters the second plate heat exchanger 220 from the D1 port of the second plate heat exchanger 220 and then exits from the D2 port, so that the second plate heat exchanger 220 is cooled, thereby cooling the heat exchange medium flowing through the second plate heat exchanger 220, and the low-temperature heat exchange medium is driven to the air duct unit coil 510 through the second variable frequency pump 520, so that the air duct unit coil 510 is cooled, and then the air or other substances in contact with the air duct unit coil 510 are cooled to the set temperature; the air-conditioning medium heated by the second plate heat exchanger 220 flows through the A4 port of the main reversing valve back to the A3 port and then back to the input end of the compressor 130. The second plate heat exchanger 220 adjusts the flow rate according to the temperature of the second temperature sensor 221, so that the present invention maintains a low energy consumption.

[0066] like Figure 3The third preferred embodiment of the air conditioning hybrid heat exchange system of the present invention is shown, which includes a main reversing valve 160, a first plate heat exchanger 210, a second plate heat exchanger 220, an air heat exchange mechanism 300, a third flow valve 430 and a fourth flow valve 440. The air heat exchange mechanism 300 includes a radiator 310 and a blowing structure 320 arranged on one side of the radiator 310. In this embodiment, the first plate heat exchanger 210 and the hot air heat exchange mechanism 300 are connected in parallel, so that the air conditioning medium can be divided into The air flows into the first plate heat exchanger 210 and the air heat exchange mechanism 300. The main reversing valve 160 is arranged at the rear end of the compressor 130 in the direction of the air conditioning medium. One end of the main reversing valve 160 is provided with an A1 port 10 connected to the compressor 130, and the other end is provided with an A2 port 20, an A3 port 30 and an A4 port 40 from left to right. The A2 port 20 of the main reversing valve 160 is connected to the H3 port of the third flow valve 430, and the A3 port is connected to the gas-liquid separator 150. The gas-liquid separator 150 is connected to the compressor 130. , the A4 port 40 is connected to the D2 port of the second plate heat exchanger 220, when cooling (i.e., cooling down), the A1 port is connected to the A2 port, the A3 port is connected to the A4 port, when heating (i.e., heating up), the A1 port is connected to the A4 port, the A2 port is connected to the A3 port, the H1 port of the third flow valve 430 is connected to the C1 port of the first plate heat exchanger 210, the H2 port is connected to the B2 port of the air heat exchange mechanism 300, and the B1 port of the air heat exchange mechanism 300 is connected to the I2 port, I1 port of the fourth flow valve 440 is connected to C2 port of the first plate heat exchanger 210, I3 port is connected to E1 port of the thermal expansion valve 180, E2 port of the thermal expansion valve 180 is connected to D1 port of the second plate heat exchanger 220; the first plate heat exchanger 210 is connected to the ground source heat pump air conditioner or water-cooled air conditioning unit 240 through the first variable frequency pump 230, and the second plate heat exchanger 220 is connected to the air duct coil 510 of the indoor air duct unit 500 through the second variable frequency pump 520.

[0067] Among them, the first plate heat exchanger 210 is provided with a first temperature sensor 211 for detecting the temperature of the first plate heat exchanger 210, the second plate heat exchanger 220 is provided with a second temperature sensor 221 for detecting the temperature of the second plate heat exchanger 220, the air heat exchange mechanism 300 is provided with an outdoor temperature sensor 330 for detecting the external ambient temperature, and the radiator 310 of the air heat exchange mechanism 300 is provided with a radiator temperature sensor 340 for detecting the internal temperature of the radiator.

[0068] The air heat exchange mechanism 300 is provided with a speed regulating component, which is connected to the control circuit of the blowing structure 320 to control the operating speed of the blowing structure 320 .

[0069] A frost sensor 350 is provided in the radiator 310 of the air heat exchange mechanism, and a heating component or a heat exchange mechanism for defrosting is provided in the radiator 310 .

[0070] Filters 190 are provided at both ends of the thermal expansion valve 180 , and a liquid storage tank 110 is further provided between the thermal expansion valve 180 and the D1 port of the second plate heat exchanger 220 .

[0071] When the air conditioning hybrid heat exchange system of the present invention is heating (i.e., heating up), the high-temperature air conditioning medium enters the A4 port through the A1 port of the main reversing valve 160 and reaches the D2 port of the second plate heat exchanger 220, and comes out from the D1 port of the second plate heat exchanger 220, so that the temperature of the second plate heat exchanger 220 is increased, thereby heating the heat exchange medium flowing through the second plate heat exchanger 220, and the high-temperature heat exchange medium is driven by the second variable frequency pump 520 to reach the air duct coil 510, so that the temperature of the air duct coil 510 is increased, and then the air duct is connected to the air duct. The air or other substances contacted by the machine coil 510 are heated to the set temperature; the air-conditioning medium through the second plate heat exchanger 220 enters the thermal expansion valve 180 from the E2 port of the thermal expansion valve 180 and becomes gas, and the temperature drops to a lower temperature. The low-temperature gas flows out from the E1 port of the thermal expansion valve 180 and enters the I3 port of the fourth flow valve 440. At this time, the flow direction of the air-conditioning medium can be divided into two types. One is to perform heat exchange through the air heat exchange mechanism 300 without passing through the first plate heat exchanger 210, and the air-conditioning medium enters the fourth flow valve from the I3 port. After flowing out from the I2 port, the air conditioning medium enters the B1 port of the air heat exchange mechanism 300, flows out from the B2 port after heat exchange in the air heat exchange mechanism 300, and flows out from the H3 port to the A2 port of the main reversing valve 160; another method is to conduct heat exchange through the first plate heat exchanger 210 without passing through the air heat exchange mechanism 300, and the air conditioning medium enters the fourth flow valve 440 from the I3 port and flows out from the I1 port to the C2 port of the first plate heat exchanger 210, and flows through the first plate heat exchanger 210. The heat exchange medium of 210 is driven by the first variable frequency pump 230, and its pipeline is heated to a temperature close to that of the underground well through the ground source heat pump air conditioner or water-cooled air conditioner unit 240; the heated air conditioning medium flows out from the C1 port of the first plate heat exchanger 210, enters the third flow valve 430 from the H1 port of the third flow valve 430, flows out from the H3 port of the third flow valve 430 to the A2 port of the reversing valve, and then flows through the A3 port and enters the gas-liquid separator 150 to return to the input end of the compressor 130 to continue compression and temperature increase, so that the air conditioning medium circulates. The air conditioning medium with a higher temperature is easier to be compressed during the compression process, and the temperature of the compressed air conditioning medium is also higher, with a higher energy efficiency ratio, and a compressor with a smaller power can be used to reach the temperature required by the indoor air duct machine 500, with lower engineering cost and less power consumption.

[0072] When the frost sensor 350 triggers a frost event, the compressor 130 stops working, and the air heat exchange mechanism is defrosted by the heat exchange medium flowing through the pipeline structure of the air heat exchange mechanism. The electric heating rod 370 can also be used for heating and defrosting. Or the main reversing valve 160 reverses to enter the cooling mode, so that the air heat exchange mechanism is heated to achieve the defrosting effect.

[0073] When the air-conditioning hybrid heat exchange system of the present invention performs cooling (i.e., cooling), the A1 port of the main reversing valve 160 is connected to the A2 port, and the A3 port is connected to the A4 port. After the compressor 130 compresses the air-conditioning medium, the air-conditioning medium is changed from gas to liquid, and the temperature of the liquid increases; after the high-temperature air-conditioning medium enters the A2 port through the A1 port of the main reversing valve 160, it enters the third flow valve 430 from the H3 port of the third flow valve 430. At this time, the flow direction of the air-conditioning medium can be divided into two types. One is to perform heat exchange through the air heat exchange mechanism 300 without passing through the first plate heat exchanger 210. After the air-conditioning medium enters the third flow valve 430 from the H3 port, it flows out from the H2 port and enters the B2 port of the air heat exchange mechanism 300. After heat exchange in the air heat exchange mechanism 300, it flows out from the B1 port and enters the fourth flow valve 44 0, flows out from the I3 port and enters the E1 port of the thermal expansion valve 180; the other is to perform heat exchange through the first plate heat exchanger 210 without passing through the air heat exchange mechanism 300. After the air conditioning medium enters the third flow valve 430 from the H3 port, it flows out from the H1 port to the C1 port of the first plate heat exchanger 210. The air conditioning medium entering the first plate heat exchanger 210 takes away the heat of the first plate heat exchanger 210 through the low-temperature heat exchange ring medium circulating in the underground well, and cools the air conditioning medium to a temperature close to that of the underground well. The cooled air conditioning medium flows out from the C2 port of the first plate heat exchanger 210 to the I1 port of the fourth flow valve 440, and then flows from the I3 port to the E1 port of the thermal expansion valve 180. It enters the thermal expansion valve 180 from the E1 port and becomes gas, and the temperature drops to a lower temperature. The air conditioning medium at a lower temperature can take away more heat after becoming gas, thereby improving the energy efficiency ratio of the compressor and reducing the energy consumption of the compressor. A compressor with a smaller power can be used to reach the temperature required by the indoor air duct unit 500, with lower engineering cost and less power consumption; the low-temperature air-conditioning medium enters the second plate heat exchanger 220 from the D1 port of the second plate heat exchanger 220 and then exits from the D2 port, so that the second plate heat exchanger 220 is cooled, thereby cooling the heat exchange medium flowing through the second plate heat exchanger 220, and the low-temperature heat exchange medium is driven to the air duct unit coil 510 through the second variable frequency pump 520, so that the air duct unit coil 510 is cooled, and then the air or other substances in contact with the air duct unit coil 510 are cooled to the set temperature; the air-conditioning medium heated by the second plate heat exchanger 220 flows through the A4 port of the main reversing valve back to the A3 port and then back to the input end of the compressor 130. The second plate heat exchanger 220 adjusts the flow rate according to the temperature of the second temperature sensor 221, so that the present invention maintains a low energy consumption.

[0074] In the third embodiment, the third flow valve 430 and the fourth flow valve 440 are provided at the same time. Alternatively, only the third flow valve 430 or only the fourth flow valve 440 may be provided. When only the third flow valve 430 is provided, the C2 port of the first plate heat exchanger 210, the B1 port of the air heat exchange mechanism 300 and the E1 port of the thermal expansion valve 180 are connected together. When only the fourth flow valve 440 is provided, the C1 port of the first plate heat exchanger, the A2 port of the main reversing valve 160 and the B2 port of the air heat exchange mechanism 300 are connected together.

[0075] like Figure 4As shown, it is a fourth embodiment of the air conditioning hybrid heat exchange system of the present invention. The fourth embodiment is based on the second embodiment. A secondary reversing valve 600 is arranged between the flow valve 400 and the first plate heat exchanger 210. The secondary reversing valve 600 includes a first reversing valve 610, a second reversing valve 620, a third reversing valve 630 and a fourth reversing valve 640. The COM port of the first reversing valve 610 is connected to the C1 port of the first plate heat exchanger 210, the NO port of the first reversing valve 610 is connected to the F1 port of the first flow valve 410, the NC port of the first reversing valve 610 is connected to the NC port of the second reversing valve 620, the NO port of the second reversing valve 620 is connected to the G1 port of the second flow valve 420, the COM port of the second reversing valve 620 is connected to the A2 port 20 of the main reversing valve 160, and the COM port of the third reversing valve 630 is connected to the A2 port 20 of the main reversing valve 160. The port is connected to the C2 port of the first plate heat exchanger 210, the CN port of the third reversing valve 630 is connected to the NC port of the fourth reversing valve 640, the COM port of the fourth reversing valve 640 is connected to the E1 port of the thermal expansion valve 180, a J1 contact is provided between the NO port of the first reversing valve 610 and the first flow valve 410, the NO port of the third reversing valve is connected to the J1 contact, a J2 contact is provided between the NO port of the second reversing valve 620 and the second flow valve 420, the NO port of the fourth reversing valve is connected to the J2 contact, the C1 port of the first plate heat exchanger 210 and the A2 port of the main reversing valve 160 are communicated through the first reversing valve 610 and the second reversing valve 620, and the C2 port of the first plate heat exchanger 210 and the E1 port of the thermal expansion valve 180 are communicated through the third reversing valve 630 and the fourth reversing valve 640. By controlling the connection of each reversing valve in the secondary reversing valve 600 to adjust the flow direction of the air conditioning medium, the air conditioning medium can be operated in various modes such as heat exchange through the first plate heat exchanger 210, heat exchange through the air heat exchange mechanism 300, and secondary heat exchange through the first plate heat exchanger 210 and the air heat exchange mechanism 300. In the case that the C1 port of the first plate heat exchanger 210 and the A2 port of the main reversing valve 160 are not directly connected, and the C2 port of the first plate heat exchanger 210 and the E1 port of the thermal expansion valve 180 are not directly connected, multiple combinations can be performed in the same air conditioning system.

[0076] When the temperature rises, Figure 5 As shown, the COM end of the first reversing valve 610 is connected to the NC end, the COM end of the second reversing valve 620 is connected to the NC end, the COM end of the third reversing valve 630 is connected to the ON end, and the COM end of the fourth reversing valve 640 is connected to the ON end; when the temperature drops, as Figure 6As shown, the COM port of the first reversing valve 610 is connected to the NC port, the COM port of the second reversing valve 620 is connected to the NC port, the COM port of the third reversing valve 630 is connected to the NO port, and the COM port of the fourth reversing valve 640 is connected to the NO port.

[0077] Preferably, the secondary reversing valve 600 also includes a fifth reversing valve 650 and a sixth reversing valve 660, the COM port of the fifth reversing valve 650 is connected to the C1 port of the first plate heat exchanger 210, the CN port of the fifth reversing valve 650 is connected to the J1 contact, the J1 contact is connected to the NO ports of the first reversing valve 610 and the third reversing valve 630; the COM port of the sixth reversing valve 660 is connected to the E1 port of the thermal expansion valve 180, the NC port of the sixth reversing valve 660 is connected to the J2 contact, and the J2 contact is connected to the NO ports of the second reversing valve 620 and the fourth reversing valve 640.

[0078] like Figure 7 As shown, it is the fifth embodiment of the present invention. The air conditioning hybrid heat exchange system of this embodiment includes a main reversing valve 160, a first plate heat exchanger 210, a second plate heat exchanger 220, an air heat exchange mechanism 300, and a secondary reversing valve 600. The secondary reversing valve 600 includes a seventh reversing valve 670, an eighth reversing valve 680, a ninth reversing valve 672 and a tenth reversing valve 682. The seventh reversing valve 670 is a four-way reversing valve having a K1 port, a K2 port, a K3 port, and a K4 port. The eighth reversing valve is a four-way reversing valve having an L1 port, an L2 port, an L3 port, and an L4 port. The ninth reversing valve 672 is a two-position two-way valve having an M1 port and an M2 port. The tenth reversing valve 682 is a two-position two-way valve having an N1 port and an N2 port. The K1 port of the secondary reversing valve 670 and the L1 port of the eighth reversing valve 680 are connected to the J1 contact, the J1 contact is connected to the B2 port of the air heat exchange mechanism 300, the M1 port of the ninth reversing valve 672 and the N1 port of the tenth reversing valve 682 are connected to the J2 contact, the J2 contact is connected to the B1 port of the air heat exchange mechanism 300, the K2 port of the seventh reversing valve 670 is connected to the C1 port of the first plate heat exchanger 210, the K3 port is connected to the A2 port of the main reversing valve 160, the K4 port is connected to the M2 port of the ninth reversing valve 672, the L2 port of the eighth reversing valve 680 is connected to the C2 port of the first plate heat exchanger 210, the L3 port is connected to the E1 port of the thermal expansion valve 180, and the L4 port is connected to the N2 port of the tenth reversing valve 682.

[0079] When the temperature rises, Figure 8As shown, the K1 port of the seventh reversing valve 670 is connected to the K4 port, the K2 port is connected to the K3 port, the K4 port is connected to the M2 port of the ninth reversing valve 672, the L1 port of the eighth reversing valve 680 is connected to the L2 port, the L3 port is connected to the L4 port, and the L4 port is connected to the N2 port of the tenth reversing valve 682. The high-temperature air-conditioning medium enters the A4 port through the A1 port of the main reversing valve 160 and reaches the D2 port of the second plate heat exchanger 220, and comes out from the D1 port of the second plate heat exchanger 220. The air-conditioning medium of the second plate heat exchanger 220 enters the thermal expansion valve 180 from the E2 port of the thermal expansion valve 180 and becomes gas, and then flows out from the After flowing out of the E1 port of the thermal expansion valve 180, it flows to the L3 port of the eighth reversing valve 680 to the L4 port and then enters the N2 port of the tenth reversing valve 682, flows out from the N1 port to the J2 connection point, and then enters the B1 port of the air heat exchange mechanism 300, flows from the B2 port to the J1 connection point and then enters the L1 port of the eighth reversing valve 680, flows out from the L2 port and enters the C2 port of the first plate heat exchanger 210, and then flows from the C1 port to the K2 port of the seventh reversing valve 670 and then flows out from the K3 port back to the A2 port of the main reversing valve 160, flows from the A3 port to the gas-liquid separator 150 and then circulates back to the input end of the compressor 130 to continue compression and temperature increase.

[0080] When cooling, Fig. 9 As shown, the K1 port of the seventh reversing valve 670 is connected to the K2 port, the K3 port is connected to the K4 port, the K4 port is connected to the M2 port of the ninth reversing valve 672, the L1 port of the eighth reversing valve 680 is connected to the L2 port, the L3 port is connected to the L4 port, and the L4 port is connected to the N2 port of the tenth reversing valve 682. The high-temperature air-conditioning medium enters the A2 port through the A1 port of the main reversing valve 160 and then enters the K3 port of the seventh reversing valve 670, and then flows out from the K4 port to enter the N2 port of the ninth reversing valve 672, enters the B1 port of the air heat exchange mechanism 300 from the N1 port for heat exchange, and then flows out from the B2 port and enters the seventh reversing valve from the J1 junction. The heat exchange medium flows out from the K1 port of the first plate heat exchanger 210, flows out from the K2 port, enters the C1 port of the first plate heat exchanger 210, and after heat exchange, flows out from the C2 port and enters the L2 port of the eighth reversing valve 680, flows out from the L3 port, enters the E1 port of the thermal expansion valve 180, flows out from the E2 port and enters the D1 port of the second plate heat exchanger 220, enters the second plate heat exchanger 220 and comes out from the D2 port, so that the second plate heat exchanger 220 is cooled down, thereby cooling the heat exchange medium flowing through the second plate heat exchanger 220. The air-conditioning medium heated by the second plate heat exchanger 220 flows through the A4 port of the main reversing valve, returns to the A3 port, and then returns to the input end of the compressor 130.

[0081] like Fig.10As shown, it is the sixth embodiment of the present invention, which is based on the first embodiment and further provides a second air heat exchange mechanism 700. The air conditioning hybrid heat exchange system of this embodiment includes a main reversing valve 160, a first plate heat exchanger 210, a second plate heat exchanger 220, an air heat exchange mechanism 300 and a second air heat exchange mechanism 700. The air heat exchange mechanism 300 and the second air heat exchange mechanism 700 both include a radiator 310, 710 and a blowing structure 320, 720 arranged on one side of the radiator 310, 710. The blowing structure generates airflow so that the air-conditioning medium circulates in the radiator 310, 710. The radiators 310, 710 are in contact with the air driven by the blowing structure 320, 720 for heat exchange, so as to realize the cooling or heating operation of the air-conditioning medium driven by the air-conditioning compressor. The main reversing valve 160 is connected to the output end of the compressor 130. One end of the main reversing valve 160 is provided with an A1 port 10 connected to the compressor 130, and the other end is provided with an A2 port 20, an A3 port 30 and an A4 port 40 from left to right. The A2 port 20 of the main reversing valve 160 is connected to the radiator B1 port of the air heat exchange mechanism 300, the A3 port is connected to the gas-liquid separator 150, the gas-liquid separator 150 is connected to the input end of the compressor 130, and the A4 port 40 is connected to the D2 port of the second plate heat exchanger 220. When cooling (i.e., cooling), the A1 port is connected to the A2 port, the A3 port is connected to the A4 port, and when heating (i.e., heating), the A1 port is connected to the A4 port. The A2 port is connected to the A3 port, the B2 port of the radiator of the air heat exchange mechanism 300 is connected to the C1 port of the first plate heat exchanger 210, the C2 port of the first plate heat exchanger 210D is connected to the B3 port of the second air heat exchange mechanism 700, the B4 port of the second air heat exchange mechanism 700 is connected to the E1 port of the thermal expansion valve 180, the E2 port of the thermal expansion valve 180 is connected to the D1 port of the second plate heat exchanger 220, the first plate heat exchanger is connected to the ground source heat pump air conditioner or the water-cooled air conditioner unit through the first variable frequency pump 230, and the second plate heat exchanger 220 is connected to the air duct coil 510 of the indoor air duct unit 500 through the second variable frequency pump 520.

[0082] The first plate heat exchanger 210 is provided with a first temperature sensor 211 for detecting the temperature of the first plate heat exchanger 210, the second plate heat exchanger 220 is provided with a second temperature sensor 221 for detecting the temperature of the second plate heat exchanger 220, the air heat exchange mechanism 300 and the second air heat exchange mechanism are provided with outdoor temperature sensors 330 and 730 for detecting the external ambient temperature, and the radiators 310 and 710 of the air heat exchange mechanism 300 and the second air heat exchange mechanism 700 are provided with radiator temperature sensors 340 and 740 for detecting the internal temperature of the radiator.

[0083] The air heat exchange mechanism 300 and the second air heat exchange mechanism 700 are provided with a speed regulating component, which is connected to the control circuit of the blowing structure 320, 720 to control the operating speed of the blowing structure 320 / 720.

[0084] The radiator 310, 710 of the air heat exchange mechanism 300, 700 is provided with a frost sensor 350, 750, and the radiator 310 is provided with a heating component or heat exchange mechanism for defrosting. The heating component can be an electric heating rod 370, 770.

[0085] Filters 190 are provided at both ends of the thermal expansion valve 180 , and a liquid storage tank 110 is further provided between the thermal expansion valve 180 and the D1 port of the second plate heat exchanger 220 .

[0086] When the air conditioning hybrid heat exchange system of the present invention performs heating (i.e., temperature increase), the A1 port of the main reversing valve 160 is connected to the A4 port, and the A2 port is connected to the A3 port. After the compressor 130 compresses the air conditioning medium, the air conditioning medium is changed from gas to liquid, and the temperature of the liquid increases; the high-temperature air conditioning medium enters the A4 port 40 through the A1 port 10 of the main reversing valve 160 and reaches the D2 port of the second plate heat exchanger 220, and comes out from the D1 port of the second plate heat exchanger 220, so that the temperature of the second plate heat exchanger 220 increases, thereby heating the heat exchange medium flowing through the second plate heat exchanger 220, and the high-temperature heat exchange medium is driven by the second variable frequency pump 520 to reach the air duct The air-conditioning medium of the second plate heat exchanger 220 enters the thermal expansion valve 180 from the E2 port of the thermal expansion valve 180 and becomes gas, and the temperature drops to a lower temperature. The low-temperature gas flows out from the E1 port of the thermal expansion valve 180 and flows through the radiator 710 from the B4 port of the second air heat exchange mechanism 700 to enter the second air heat exchange mechanism. At this time, there is a large temperature difference between the lower temperature air-conditioning medium and the ambient temperature. The air flows through the second air heat exchange mechanism 700, so that the temperature of the air-conditioning medium is close to the ambient temperature. In this process, the blowing structure 720 can be operated or not according to the specific situation. The air-conditioning medium heated by the second air heat exchange mechanism 700 comes out from the B3 port, enters the first plate heat exchanger 210 through the C2 port of the first plate heat exchanger 210, and then comes out from the C1 port. The heat exchange medium flowing through the first plate heat exchanger 210 is driven by the first variable frequency pump 230 to heat its pipeline through the underground well to a temperature close to the underground well temperature. The air-conditioning medium heated twice flows from the B2 port of the air heat exchange mechanism 300 through the radiator 310 and then comes out from the B1 port, and then flows through the A2 port 20 to the A3 port 30 of the main reversing valve 160 and returns to the input end of the compressor 130 to continue compression and temperature increase. The air-conditioning medium with a higher temperature is easier to be compressed during the compression process, and the temperature of the compressed air-conditioning medium is also higher, with a higher energy efficiency ratio. A compressor with a smaller power can be used to reach the temperature required by the indoor duct machine 500, with lower engineering costs and less power consumption.

[0087] When the frost sensor 350, 750 triggers a frost event, the compressor 130 stops working, and the air heat exchange mechanism 300 and / or the second air heat exchange mechanism 700 is defrosted by the heat exchange medium flowing through the air heat exchange mechanism 300, 700; the defrosting can also be performed by heating with the electric heating rods 370, 770; or the main reversing valve 160 is reversed to enter the cooling mode, and the first variable frequency pump 230 and the second variable frequency pump 520 do not work, so that the air heat exchange mechanism 300 and / or the second air heat exchange mechanism 700 are heated to achieve a defrosting effect.

[0088] When the air-conditioning hybrid heat exchange system of the present invention performs cooling (i.e., cooling), the A1 port of the main reversing valve 160 is connected to the A2 port, and the A3 port is connected to the A4 port. After the compressor 130 compresses the air-conditioning medium, the air-conditioning medium changes from gas to liquid, and the temperature of the liquid increases; after the heated air-conditioning medium enters the A2 port 20 through the A1 port 10 of the main reversing valve 160, it enters the air heat exchange mechanism 300 from the B1 port of the air heat exchange mechanism 300. At this time, there is a large temperature difference between the high-temperature air-conditioning medium and the ambient temperature. The air flowing through the air heat exchange mechanism 300 can easily take away heat at a low energy consumption, so that the temperature of the air-conditioning medium drops to a temperature close to the ambient temperature; the cooled air-conditioning medium flows out from the B2 port of the air heat exchange mechanism 300, and then enters the first plate heat exchanger 210 from the C1 port. The low-temperature heat exchange ring medium circulating through the underground well takes away the heat of the first plate heat exchanger 210, and further cools the air-conditioning medium to a temperature close to the underground well. The air conditioning medium cooled by the air heat exchange mechanism 300 reduces the total amount of heat exchanged by the first plate heat exchanger 210, which can reduce the length of the pipeline flowing through the underground well and the number of underground wells, and can also make the air conditioning medium closer to the temperature of the underground well; the air conditioning medium after secondary cooling flows out from the C2 port of the first plate heat exchanger 210, enters the radiator 710 of the second air heat exchange mechanism 700 from the B3 port of the second air heat exchange mechanism 700 for heat exchange again, and the blowing structure 720 can be operated or not according to the specific situation during this process. The air conditioning medium after heat exchange flows out from the B4 port of the second air heat exchange mechanism 700, enters the thermal expansion valve 180 from the E1 port to become gas, and the temperature drops to a lower temperature. The air conditioning medium with a lower temperature can take away more heat after becoming gas, thereby improving the energy efficiency ratio of the compressor 130 and reducing the energy consumption of the compressor 130. A compressor 130 with a smaller power can be used to reach the temperature required by the indoor air duct unit 500, with lower engineering cost and less power consumption; the low-temperature air-conditioning medium flows out from the E2 port of the thermal expansion valve 180, enters the second plate heat exchanger 220 from the D1 port of the second plate heat exchanger 220, and then comes out from the D2 port, so that the second plate heat exchanger 220 is cooled, thereby cooling the heat exchange medium flowing through the second plate heat exchanger 220, and the low-temperature heat exchange medium is driven to the air duct unit coil 510 through the second variable frequency pump 520, so that the air duct unit coil 510 is cooled, and then the air or other substances in contact with the air duct unit coil 510 are cooled to the set temperature; the air-conditioning medium heated by the second plate heat exchanger 220 flows through the A4 port 40 of the main reversing valve 160 back to the A3 port 30 and then back to the input end of the compressor 130. The second plate heat exchanger 220 adjusts the flow rate according to the temperature of the second temperature sensor 221, so that the present invention maintains a low energy consumption.

[0089] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. An air conditioning hybrid heat exchange system, characterized in that: include: A main reversing valve, a first plate heat exchanger, a second plate heat exchanger and an air heat exchange mechanism, wherein the main reversing valve is connected to the output end of the compressor, one end of the main reversing valve is provided with an A1 port connected to the compressor, and the other end is provided with an A2 port, an A3 port and an A4 port, the A2 port of the main reversing valve is connected to the B1 port of the air heat exchange mechanism, the A3 port is connected to the gas-liquid separator, the gas-liquid separator is connected to the input end of the compressor, the A4 port is connected to the D2 port of the second plate heat exchanger, and the A1 port is connected to the A2 port during cooling. The A3 port is connected to the A4 port. When heating, the A1 port is connected to the A4 port, and the A2 port is connected to the A3 port. The B2 port of the air heat exchange mechanism is connected to the C1 port of the first plate heat exchanger, and the C2 port of the first plate heat exchanger is connected to the E1 port of the thermal expansion valve. The E2 port of the thermal expansion valve is connected to the D1 port of the second plate heat exchanger. The first plate heat exchanger is connected to the ground source heat pump air conditioner or the water-cooled air conditioner unit through the first variable frequency pump, and the second plate heat exchanger is connected to the indoor duct unit through the second variable frequency pump.

2. An air conditioning hybrid heat exchange system according to claim 1, characterized in that: The air heat exchange mechanism is provided with a first pipeline, a heat exchange medium flows in the first pipeline, and a variable frequency pump is provided on the first pipeline, and the flow rate of the heat exchange medium is controlled by the variable frequency pump.

3. The air conditioning hybrid heat exchange system according to claim 1, characterized in that: It also includes a flow valve arranged between the air heat exchange mechanism and the first plate heat exchanger, the flow valve includes a first flow valve and a second flow valve, the F1 port of the first flow valve is connected to the C1 port of the first plate heat exchanger, the F2 port of the first flow valve is connected to the B2 port of the air heat exchange mechanism, the G1 port of the second flow valve is connected to the A2 port of the main reversing valve, the G2 port of the second flow valve is connected to the B1 port of the air heat exchange mechanism, and the F3 port of the first flow valve is connected to the G3 port of the second flow valve.

4. An air conditioning hybrid heat exchange system according to claim 1 or 2, characterized in that: It also includes a third flow valve and a fourth flow valve, the H1 port of the third flow valve is connected to the C1 port of the first plate heat exchanger, the H2 port is connected to the B2 port of the air heat exchange mechanism, the H3 port is connected to the A2 port of the main reversing valve, the I1 port of the fourth flow valve is connected to the C2 port of the first plate heat exchanger, the I2 port is connected to the B1 port of the air heat exchange mechanism, and the I3 port is connected to the E1 port of the thermal expansion valve.

5. An air conditioning hybrid heat exchange system according to claim 1 or 2, characterized in that: It also includes a third flow valve and / or a fourth flow valve, the H1 port of the third flow valve is connected to the C1 port of the first plate heat exchanger, the H2 port is connected to the B2 port of the air heat exchange mechanism, the H3 port is connected to the A2 port of the main reversing valve, the C2 port of the first plate heat exchanger, the B1 port of the air heat exchange mechanism and the E1 port of the thermal expansion valve are connected together; the I1 port of the fourth flow valve is connected to the C2 port of the first plate heat exchanger, the I2 port is connected to the B1 port of the air heat exchange mechanism, the I3 port is connected to the E1 port of the thermal expansion valve, the C1 port of the first plate heat exchanger, the B2 port of the air heat exchange mechanism and the A2 port of the main reversing valve are connected together.

6. The air conditioning hybrid heat exchange system according to claim 1, characterized in that: It also includes a secondary reversing valve, which includes a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve, the COM port of the first reversing valve is connected to the C1 port of the first plate heat exchanger, the NO port of the first reversing valve is connected to the B2 port of the air heat exchange mechanism, the NC port of the first reversing valve is connected to the NC port of the second reversing valve, the NO port of the second reversing valve is connected to the B1 port of the air heat exchange mechanism, the COM port of the second reversing valve is connected to the A2 port of the main reversing valve, the COM port of the third reversing valve is connected to the C2 port of the first plate heat exchanger, the CN port of the third reversing valve is connected to the NC port of the fourth reversing valve, and the The COM port of the reversing valve is connected to the E1 port of the thermal expansion valve, the NO port of the first reversing valve is connected to the J1 contact, the J1 contact is connected to the B2 port of the air heat exchange mechanism, the NO port of the first reversing valve and the N0 port of the third reversing valve, the NO port of the fourth reversing valve is connected to the J2 contact, the J2 contact is connected to the B1 port of the air heat exchange mechanism, the NO port of the fourth reversing valve and the NO port of the second reversing valve, the C1 port of the first plate heat exchanger and the A2 port of the main reversing valve are connected through the first reversing valve and the second reversing valve, and the C2 port of the first plate heat exchanger and the E1 port of the thermal expansion valve are connected through the third reversing valve and the fourth reversing valve.

7. An air conditioning hybrid heat exchange system according to claim 4, characterized in that: It also includes a secondary reversing valve, which includes a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve, the COM port of the first reversing valve is connected to the C1 port of the first plate heat exchanger, the NO port of the first reversing valve is connected to the F1 port of the first flow valve, the NC port of the first reversing valve is connected to the NC port of the second reversing valve, the NO port of the second reversing valve is connected to the G1 port of the second flow valve, the COM port of the second reversing valve is connected to the A2 port of the main reversing valve, the COM port of the third reversing valve is connected to the The C2 port of a plate heat exchanger, the CN port of the third reversing valve is connected to the NC port of the fourth reversing valve, the COM port of the fourth reversing valve is connected to the E1 port of the thermal expansion valve, the NO port of the first reversing valve is connected to the J1 contact, the NO port of the fourth reversing valve is connected to the J2 contact, the C1 port of the first plate heat exchanger and the A2 port of the main reversing valve are connected through the first reversing valve and the second reversing valve, and the C2 port of the first plate heat exchanger and the E1 port of the thermal expansion valve are connected through the third reversing valve and the fourth reversing valve.

8. An air conditioning hybrid heat exchange system according to claim 6 or 7, characterized in that: The secondary reversing valve also includes a fifth reversing valve and a sixth reversing valve, the COM port of the fifth reversing valve is connected to the C1 port of the first plate heat exchanger, the CN port of the fifth reversing valve is connected to the J1 contact, the J1 contact is connected to the NO ports of the first reversing valve and the third reversing valve; the COM port of the sixth reversing valve is connected to the E1 port of the thermal expansion valve, the NC port of the sixth reversing valve is connected to the J2 contact, and the J2 contact is connected to the NO ports of the second reversing valve and the fourth reversing valve.

9. An air conditioning hybrid heat exchange system as claimed in claim 2 or 3, characterized in that: It also includes secondary reversing valves, which include a seventh reversing valve, an eighth reversing valve, a ninth reversing valve and a tenth reversing valve. The seventh reversing valve is a four-way reversing valve having a K1 port, a K2 port, a K3 port and a K4 port. The eighth reversing valve is a four-way reversing valve having a L1 port, a L2 port, a L3 port and a L4 port. The ninth reversing valve is a two-position two-way valve having a M1 port and a M2 port. The tenth reversing valve is a two-position two-way valve having a N1 port and a N2 port. The K1 port of the seventh reversing valve and the L1 port of the eighth reversing valve are connected to the J1 contact. , the J1 contact is connected to the B2 port of the air heat exchange mechanism, the M1 port of the ninth reversing valve and the N1 port of the tenth reversing valve are connected to the J2 contact, the J2 contact is connected to the B1 port of the air heat exchange mechanism, the K2 port of the seventh reversing valve is connected to the C1 port of the first plate heat exchanger, the K3 port is connected to the A2 port of the main reversing valve, the K4 port is connected to the M2 port of the ninth reversing valve, the L2 port of the eighth reversing valve is connected to the C2 port of the first plate heat exchanger, the L3 port is connected to the E1 port of the thermal expansion valve, and the L4 port is connected to the N2 port of the tenth reversing valve.

10. The air conditioning hybrid heat exchange system according to claim 1, characterized in that: It also includes a second air heat exchange mechanism, which is arranged between the first plate heat exchanger and the thermal expansion valve, the B3 port of the second air heat exchange mechanism is connected to the C2 port of the first plate heat exchanger, and the B4 port of the second air heat exchange mechanism is connected to the E1 port of the thermal expansion valve.

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