A direct expansion type air conditioner refrigerant heat recovery device
Patent Information
- Application Number
- CN202522268149.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-27
AI Technical Summary
[0002]直膨式空调系统在家用空调及工业空调中广泛应用，其基本组成是压缩机、蒸发器、冷凝器及节流阀，工作原理为液态的工作介质冷媒在房间内的蒸发器中吸热蒸发为气态，经压缩机压缩后排至室外冷凝器与室外空气进行热交换，将热量释放到环境中并变回液态，冷媒压力被节流阀泄去，房间热量被排放到环境，能量没有得到有效利用
（1）本实用新型的直膨式空调冷媒热量回收装置设有室外机冷凝器、涡轮发电机、储液器、节流阀、室内机蒸发器、压缩机和冷凝换热装置，在正常进行制冷-余热回收的工况下，第六阀门关闭，被室内蒸发器汽化的冷媒由引导加压后进入冷凝换热装置，经冷却后，液态冷媒进入涡轮发电机，气态冷媒进入室外机冷凝器进行进一步冷却；经过冷却的高压液态冷媒通过涡轮发电机进入储液器，在降压的同时可制造部分电力供空调自身运转使用。
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Figure CN224787351U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat recovery, and in particular to a direct expansion air conditioning refrigerant heat recovery device. Background Technology
[0002] Direct expansion air conditioning systems are widely used in household and industrial air conditioning. Their basic components are a compressor, evaporator, condenser, and expansion valve. The working principle is that the liquid working medium, refrigerant, absorbs heat and evaporates into a gaseous state in the evaporator in the room. After being compressed by the compressor, it is discharged to the outdoor condenser to exchange heat with the outdoor air, releasing heat into the environment and turning back into a liquid state. The refrigerant pressure is released by the expansion valve, and the room heat is discharged into the environment, so the energy is not effectively utilized. Utility Model Content
[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a direct expansion air conditioning refrigerant heat recovery device, which can realize energy recovery, reduce energy waste, reduce environmental impact, and improve energy utilization efficiency.
[0004] This utility model provides a direct expansion type air conditioning refrigerant heat recovery device, comprising: Outdoor unit condenser; A turbine generator, the input of which is connected to the output of the outdoor unit's condenser; A liquid reservoir, the input end of which is connected to the output end of the turbine generator, stores refrigerant; The evaporator of the indoor unit has its input end connected to the output end of the liquid receiver via a first refrigerant pipe, and a throttling valve is provided on the first refrigerant pipe; The compressor has its input end connected to the output end of the indoor unit's evaporator; The condensing heat exchange device has its input end connected to the output end of the compressor via a second refrigerant pipe, its gas output end connected to the outdoor unit condenser, and its liquid output end connected to the turbine generator. A water storage tank is fixedly installed inside the device. The top of the water storage tank is connected to an inlet pipe, and the bottom is connected to an outlet pipe. Several microporous throttling plates are evenly spaced from the top to the bottom inside the water storage tank.
[0005] Furthermore, the second refrigerant pipe enters from the bottom of one side of the water storage tank, passes through the microporous throttling plate, rises in an S-shape to the top of the water storage tank and extends out of the water storage tank, and is connected to the gas-liquid separator through the third refrigerant pipe. The liquid output end of the gas-liquid separator is connected to the turbine generator through the fourth refrigerant pipe, which is equipped with a second valve. The gas output end of the gas-liquid separator is connected to the outdoor unit condenser through the fifth refrigerant pipe, which is equipped with a third valve.
[0006] Furthermore, the second refrigerant pipe is equipped with a first valve, a first thermometer, and a first pressure gauge; the third refrigerant pipe is equipped with a second pressure gauge, a second thermometer, and a first flow meter; the inlet pipe, from the inlet end to the storage tank end, is sequentially equipped with a drain valve, a Y-type filter, a water pump, a check valve, a fourth valve, a third pressure gauge, and a third thermometer; the outlet pipe, from the storage tank end to the outlet end, is sequentially equipped with a fourth pressure gauge, a fourth thermometer, a fifth valve, and a second flow meter.
[0007] Furthermore, the microporous throttling plate consists of an upper plate and a lower plate. The lower plate is slidably mounted on the bottom surface of the upper plate and is driven to slide by a micro motor. Small holes with a diameter of no more than mm are evenly formed on the upper and lower plates respectively. The length and width of the upper plate are the same as the length and width of the inside of the water storage tank. The width of the lower plate is equal to that of the upper plate, and its length is less than that of the upper plate. The difference in length between the two plates is not less than the diameter of the small holes formed on the upper or lower plate.
[0008] Furthermore, the output end of the compressor is connected to the input end of the outdoor unit condenser via a sixth refrigerant pipe, and a sixth valve is provided on the sixth refrigerant pipe.
[0009] Furthermore, the micro motor, sixth valve, first valve, first thermometer, first pressure gauge, second thermometer, second pressure gauge, first flow meter, second valve, third valve, drain valve, Y-type filter, water pump, check valve, fourth valve, third pressure gauge, third thermometer, fourth pressure gauge, fourth thermometer, fifth valve, and second flow meter on the microporous throttling plate are all connected to the microcontroller.
[0010] Compared with the prior art, the beneficial effects of this utility model are: (1) The direct expansion air conditioning refrigerant heat recovery device of this utility model is equipped with an outdoor unit condenser, a turbine generator, a liquid receiver, a throttle valve, an indoor unit evaporator, a compressor and a condensing heat exchange device. Under normal refrigeration-waste heat recovery conditions, the sixth valve is closed. The refrigerant vaporized by the indoor evaporator is guided and pressurized before entering the condensing heat exchange device. After cooling, the liquid refrigerant enters the turbine generator, and the gaseous refrigerant enters the outdoor unit condenser for further cooling. The high-pressure liquid refrigerant after cooling enters the liquid receiver through the turbine generator. While reducing the pressure, it can generate some electricity for the operation of the air conditioner itself.
[0011] (2) The condensing heat exchange device of this utility model is equipped with a water storage tank and a microporous throttling plate. Tap water is injected into the water storage tank through the inlet pipe. The microporous throttling plate in the water storage tank can control the pressure and flow rate of each layer of water in the water storage tank by adjusting the opening of the orifice, so as to absorb the heat in the refrigerant with high efficiency, cool the refrigerant, heat the water in the water storage tank, and the outlet pipe leads to the user end for use. Energy recovery is realized, energy waste is reduced, environmental impact is reduced, and energy utilization efficiency is improved.
[0012] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description
[0013] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of a direct expansion air conditioning refrigerant heat recovery device. Figure 2 This is a schematic diagram of the condensation heat exchanger. Figure 3 This is an isometric view of a microporous throttling plate. Figure 4 This is a front view of a microporous throttling plate.
[0014] The following are the labels in the diagram: 1. Outdoor unit condenser; 2. Turbine generator; 3. Liquid receiver; 4. Throttling valve; 5. Indoor unit evaporator; 6. Compressor; 7. Condensing heat exchanger. 51. First refrigerant pipe; 61. Sixth refrigerant pipe; 62. Sixth valve; 71. Second refrigerant pipe; 72. Water storage tank; 73. Microporous throttling plate; 74. Third refrigerant pipe; 75. Gas-liquid separator; 76. Fourth refrigerant pipe; 77. Fifth refrigerant pipe; 78. Inlet pipe; 79. Outlet pipe; 711. First valve; 712. First thermometer; 713. First pressure gauge; 731, upper plate; 732, lower plate; 741. Second pressure gauge; 742. Second temperature gauge; 743. First flow meter; 761. Second valve; 771. Third valve; 781. Drain valve; 782. Y-type filter; 783. Water pump; 784. Check valve; 785. Fourth valve; 786. Third pressure gauge; 787. Third temperature gauge; 791. Fourth pressure gauge; 792. Fourth temperature gauge; 793. Fifth valve; 794. Second flow meter. Detailed Implementation
[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.
[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0017] Please refer to Figures 1-4 An embodiment of this utility model provides a direct expansion air conditioning refrigerant heat recovery device, characterized in that it includes: Outdoor unit condenser 1; Turbine generator 2, the input end of which is connected to the output end of outdoor unit condenser 1; The liquid receiver 3 has its input end connected to the output end of the turbine generator 2, and it stores refrigerant. The indoor unit evaporator 5 has its input end connected to the output end of the liquid receiver 3 via a first refrigerant pipe 51, and a throttling valve 4 is installed on the first refrigerant pipe 51. The compressor 6 has its input end connected to the output end of the indoor unit evaporator 5; The condensing heat exchange device 7 has its input end connected to the output end of the compressor 6 via the second refrigerant pipe 71, its gas output end connected to the outdoor unit condenser 1, and its liquid output end connected to the turbine generator 2. A water storage tank 72 is fixedly installed inside the device. The top of the water storage tank 72 is connected to the water inlet pipe 78, and the bottom is connected to the water outlet pipe 79. Several microporous throttling plates 73 are evenly spaced from the top to the bottom inside the water storage tank 72.
[0018] In this embodiment, under normal refrigeration-waste heat recovery operation, the refrigerant vaporized by the indoor evaporator 1 is pressurized by the compressor 6 and enters the condensing heat exchange device 7. After cooling, the liquid refrigerant enters the turbine generator 2, and the gaseous refrigerant enters the outdoor unit condenser 1 for further cooling. The cooled high-pressure liquid refrigerant enters the liquid receiver 3 after passing through the turbine generator 2. While reducing the pressure, it can generate some electricity to power the air conditioner itself.
[0019] The water storage tank 72 inside the condensing heat exchanger 1 is filled with tap water through the inlet pipe 78. The microporous throttling plate 73 can control the pressure and flow rate of each layer by adjusting the opening of the orifice, so as to absorb heat from the refrigerant with high efficiency, cool the refrigerant, heat the water in the water storage tank 72, and supply the water to the user end through the outlet pipe 79. This achieves energy recovery, reduces energy waste, reduces environmental impact, and improves energy utilization efficiency.
[0020] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the second refrigerant pipe 71 enters from the bottom of one side of the water storage tank 72, passes through the microporous throttling plate 73, rises in an S-shape to the top of the water storage tank 72 and extends out of the water storage tank 72. It is connected to the gas-liquid separator 75 through the third refrigerant pipe 74. The liquid output end of the gas-liquid separator 75 is connected to the turbine generator 2 through the fourth refrigerant pipe 76. The fourth refrigerant pipe 76 is equipped with a second valve 761. The gas output end of the gas-liquid separator 75 is connected to the outdoor unit condenser 1 through the fifth refrigerant pipe 77. The fifth refrigerant pipe 77 is equipped with a third valve 771, which can control the opening and closing of the second valve 761 and the third valve 771 to control the flow of refrigerant and improve energy utilization.
[0021] In a preferred embodiment, such as Figure 2 As shown, the second refrigerant pipe 71 is equipped with a first valve 711, a first thermometer 712, and a first pressure gauge 713; the third refrigerant pipe 74 is equipped with a second pressure gauge 741, a second thermometer 742, and a first flow meter 743; the inlet pipe 78, from the inlet end to the storage tank end, is equipped with a drain valve 781, a Y-type filter 782, a water pump 783, a check valve 784, a fourth valve 785, a third pressure gauge 786, and a third thermometer 787; the outlet pipe 79, from the storage tank end to the outlet end, is equipped with a fourth pressure gauge 791, a fourth thermometer 792, a fifth valve 793, and a second flow meter 794.
[0022] In this embodiment, tap water is filtered by water pump 783 through Y-type filter 782 and pumped into water storage tank 72 through inlet pipe 78. Since hot water has a higher density than cold water, the pumped tap water will preferentially absorb heat from the cooler refrigerant and then flow from top to bottom through the water tank, gradually increasing the absorbed heat. There is no situation where the water is reheated by the refrigerant. The opening of the fourth valve 785 can be adjusted according to the values of the third pressure gauge 786 and the third temperature gauge 787, and the opening of the fifth valve 793 can be adjusted according to the values of the fourth pressure gauge 791, the fourth temperature gauge 792, and the second flow meter 794 to improve energy utilization.
[0023] In a preferred embodiment, such as Figure 3 and Figure 4As shown, the microporous throttling plate 73 consists of an upper plate 731 and a lower plate 732. The lower plate 732 is slidably mounted on the bottom surface of the upper plate 731 and is driven to slide by a micro motor. Small holes with a diameter of no more than 10 mm are evenly opened on the upper plate 731 and the lower plate 732. The length and width of the upper plate 731 are the same as the length and width of the inside of the water storage tank 72. The width of the lower plate 732 is equal to that of the upper plate 731, and its length is less than that of the upper plate 731. The difference in length between the two is not less than the diameter of the small holes drilled on the upper plate 731 or the lower plate 732.
[0024] In this embodiment, the opening of the small holes on the microporous throttling plate 73 can be adjusted by adjusting the position of the lower plate 732 as needed, so as to control the pressure and flow rate of each layer of water in the water storage tank 72, absorb heat in the refrigerant with high efficiency, cool the refrigerant, heat the water in the water storage tank 72, and improve energy utilization.
[0025] In a preferred embodiment, such as Figure 1 As shown, the output end of the compressor 6 is connected to the input end of the outdoor unit condenser 1 through the sixth refrigerant pipe 61, and the sixth refrigerant pipe 61 is equipped with a sixth valve 62.
[0026] In this embodiment, if the user does not wish to use the heat recovery system or if the heat carried by the refrigerant is insufficient to meet the conditions for heat recovery according to the first temperature gauge 712 and the first pressure gauge 713, the heat recovery system can be isolated by opening the sixth valve 62 and closing the first valve 711, the second valve 761, the third valve 771, the fourth valve 785 and the fifth valve 793. That is, the condensing heat exchange device 7 stops operating and the traditional operating mode is started. The system only dissipates heat from the high-temperature refrigerant from the indoor unit through the outdoor unit condenser 1, which meets the user's needs and improves the energy utilization rate.
[0027] In a preferred embodiment, such as Figure 1 and Figure 2 As shown, the micro motor, sixth valve 62, first valve 711, first thermometer 712, first pressure gauge 713, second thermometer 742, second pressure gauge 741, first flow meter 743, second valve 761, third valve 771, drain valve 781, Y-type filter 782, water pump 783, check valve 784, fourth valve 785, third pressure gauge 786, third thermometer 787, fourth pressure gauge 791, fourth thermometer 792, fifth valve 793, and second flow meter 794 on the micro-orifice throttling plate 73 are all connected to the microcontroller.
[0028] In this embodiment, the single-chip microcomputer opens or closes the sixth valve 62, the first valve 711, the second valve 761, and the third valve 771 based on the values of the first thermometer 712, the first pressure gauge 713, the second thermometer 742, the second pressure gauge 741, and the first flow meter 743. Based on the values of the third pressure gauge 786 and the third thermometer 787, it adjusts the power of the water pump 783 and the opening degree of the fourth valve 785. Based on the values of the fourth pressure gauge 791, the fourth thermometer 792, and the second flow meter 794, it adjusts the opening degree of the fifth valve 793, making the entire heat recovery device more intelligent and efficient, and improving energy utilization.
[0029] The microcontroller controls the opening of the micro motor, water pump, and valves based on the values from various tables.
[0030] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0031] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0032] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A direct expansion type air conditioning refrigerant heat recovery device, characterized in that, include: Outdoor unit condenser (1); A turbine generator (2) has its input end connected to the output end of the outdoor unit condenser (1); The liquid reservoir (3) has its input end connected to the output end of the turbine generator (2) and stores refrigerant inside; The indoor unit evaporator (5) has its input end connected to the output end of the liquid receiver (3) via a first refrigerant pipe (51), and a throttling valve (4) is provided on the first refrigerant pipe (51). The compressor (6) has its input end connected to the output end of the indoor unit evaporator (5); The condensing heat exchange device (7) has its input end connected to the output end of the compressor (6) through the second refrigerant pipe (71), its gas output end connected to the outdoor unit condenser (1), and its liquid output end connected to the turbine generator (2). A water storage tank (72) is fixedly installed inside it. The top of the water storage tank (72) is connected to the water inlet pipe (78), and the bottom is connected to the water outlet pipe (79). Several microporous throttling plates (73) are evenly spaced from the top to the bottom inside the water storage tank (72).
2. The direct expansion air conditioning refrigerant heat recovery device according to claim 1, characterized in that, The second refrigerant pipe (71) enters from the bottom of one side of the water storage tank (72), passes through the microporous throttling plate (73), rises in an S-shape to the top of the water storage tank (72) and extends out of the water storage tank (72), and is connected to the gas-liquid separator (75) through the third refrigerant pipe (74). The liquid output end of the gas-liquid separator (75) is connected to the turbine generator (2) through the fourth refrigerant pipe (76). The fourth refrigerant pipe (76) is provided with a second valve (761). The gas output end of the gas-liquid separator (75) is connected to the outdoor unit condenser (1) through the fifth refrigerant pipe (77). The fifth refrigerant pipe (77) is provided with a third valve (771).
3. The direct expansion air conditioning refrigerant heat recovery device according to claim 2, characterized in that, The second refrigerant pipe (71) is equipped with a first valve (711), a first thermometer (712) and a first pressure gauge (713), and the third refrigerant pipe (74) is equipped with a second pressure gauge (741), a second thermometer (742) and a first flow meter (743); the inlet pipe (78) is equipped with a drain valve (781), a Y-type filter (782), a water pump (783), a check valve (784), a fourth valve (785), a third pressure gauge (786) and a third thermometer (787) in sequence from the inlet end to the storage tank end, and the outlet pipe (79) is equipped with a fourth pressure gauge (791), a fourth thermometer (792), a fifth valve (793) and a second flow meter (794) in sequence from the storage tank end to the outlet end.
4. The direct expansion air conditioning refrigerant heat recovery device according to claim 3, characterized in that, The microporous throttling plate (73) consists of an upper plate (731) and a lower plate (732). The lower plate (732) is slidably mounted on the bottom surface of the upper plate (731) and is driven to slide by a micro motor. Small holes with a diameter of no more than 10 mm are evenly opened on the upper plate (731) and the lower plate (732). The length and width of the upper plate (731) are the same as the length and width of the inside of the water storage tank (72). The width of the lower plate (732) is equal to that of the upper plate (731), and its length is less than that of the upper plate (731). The difference in length between the two is not less than the diameter of the small holes drilled on the upper plate (731) or the lower plate (732).
5. The direct expansion air conditioning refrigerant heat recovery device according to claim 1, characterized in that, The output end of the compressor (6) is connected to the input end of the outdoor unit condenser (1) through the sixth refrigerant pipe (61), and the sixth refrigerant pipe (61) is provided with a sixth valve (62).
6. The direct expansion air conditioning refrigerant heat recovery device according to claim 4, characterized in that, The micro motor, sixth valve (62), first valve (711), first thermometer (712), first pressure gauge (713), second thermometer (742), second pressure gauge (741), first flow meter (743), second valve (761), third valve (771), drain valve (781), Y-type filter (782), water pump (783), check valve (784), fourth valve (785), third pressure gauge (786), third thermometer (787), fourth pressure gauge (791), fourth thermometer (792), fifth valve (793), and second flow meter (794) on the microporous throttling plate (73) are all connected to the microcontroller.