WO2013000335A1 - Heat energy recovery device - Google Patents

Abstract

A heat energy recovery device, comprising an air exhaust heat sink, a water drainage heat sink, a water reservoir, and a circulating water pump or a refrigeration system; the refrigeration system comprises a room air conditioner. The air exhaust heat sink and the water drainage heat sink are arranged in a kitchen or other places where waste heat is available so as to conduct heat exchange with high temperature waste air or waste water, and the heat energy is then collected into the water reservoir via the circulation of the circulating water pump or the refrigerating system. The room air conditioner in the refrigerating system provides cold air or hot air for the room.

Description

 Heat recovery unit

 Technical field

 The invention belongs to the field of air conditioning refrigeration, and particularly relates to a device for recovering thermal energy by using a refrigerator.

 Background technique

In the kitchen cooking and cooking process, the kitchen and restaurant operation room consumes a large amount of fuel, generates a large amount of high-temperature fume exhaust gas, and high-temperature washing waste water. The fume is discharged to the outside by the range hood and the exhaust hood, and the washing waste water is discharged into the sewer. The heat is also discharged, and there is no recycling. At the same time, it is necessary to use heat to heat domestic hot water and heating hot water, thus wasting a lot of energy. Not only in the process of food cooking, but also in other aspects of life and production, there are many phenomena in which heat is discharged and not recycled.

 Summary of the invention

 It is an object of the present invention to provide an apparatus capable of recovering thermal energy.

The solution of the invention is that the heat energy recovery device is composed of an exhaust heat absorber, a drain heat absorber, a circulating water pump, a water storage device, a refrigeration system, and a power distribution control system. The exhaust air heat absorber is installed in a device that excludes high-temperature exhaust gas, such as a range hood and a smoke exhaust hood, and exchanges heat with high-temperature exhaust gas such as oil smoke. The drain heat absorber is installed in a place where high-temperature wastewater such as kitchen washing passes, and exchanges heat with high-temperature wastewater. The exhaust heat absorber and the drain heat absorber are filled with water or refrigerant, and the heat energy discharged from living and production is collected into the water storage device through the circulation of the circulating water pump or the refrigeration system to provide the user with domestic hot water and air conditioner. Hot water while saving fuel.

 DRAWINGS

 Figure 1 is a diagram of the heat recovery device system (1)

 Figure 2 is a diagram of the heat recovery device system (2)

 Figure 3 is a thermal energy recovery device with a refrigeration system (1)

 Figure 4 is a thermal energy recovery device with a refrigeration system (2)

 Figure 5 is a thermal energy recovery device with a refrigeration system (3)

 Figure 6 is a thermal energy recovery device with a refrigeration system (4)

 Figure 7 is a three-control multi-connection heat recovery air conditioning system diagram (1)

 Figure 8 is a three-control multi-connection heat recovery air conditioning system diagram (2)

 Figure 9 is a thermal energy recovery device with a refrigeration system (5)

 Figure 10 is a heat recovery unit with a refrigeration system ( 6 )

 Figure 11 is a heat recovery unit with a heat pump system ( 1 )

 Figure 12 is a heat recovery unit with a heat pump system ( 2 )

 Figure 13 is a heat recovery device with a wind-wind heat exchanger (1)

 Figure 14 is a heat recovery device with a wind-wind heat exchanger (2)

 Figure 15 is a diagram of a three-control multi-connected heat recovery air conditioning system with solar energy (1)

 Figure 16 is a diagram of a three-control multi-connected heat recovery air conditioning system with solar energy (2)

 Figure 17 is a thermal energy recovery device with solar energy and refrigeration system (1)

 Figure 18 is a thermal energy recovery device with solar energy and refrigeration system ( 2 )

 Figure 19 is a thermal energy recovery device with solar and refrigeration systems (3)

 Figure 20 is a thermal energy recovery device with solar energy and refrigeration system (4)

 Figure 21 is a thermal energy recovery device with solar energy and refrigeration system (5)

 Figure 22 is a thermal energy recovery device with solar and refrigeration system (6)

 Figure 23 is a thermal energy recovery device with a solar air heater and a refrigeration system (1)

 Figure 24 is a thermal energy recovery device with a solar air heater and a refrigeration system (2)

 Description of the reference signs:

 1, exhaust heat absorber, 2, drain heat absorber, 3, 135, water storage, 4, 128, room air conditioner, 5 , expander, 6, 99, 102, 106, 127, circulating water pump, 7 , 8 , 9 , 10 , 29 , 39 , 94 , 110 , 111 , electric control valve , 11 , 12 , 13 , 14 , 20 , 21 , 22 , 27 , 28 , 67 , 123 , 124 , 125 , 126 , valves , 15 , 52 , 138 , blower , 16 , gas - liquid separator , 17 , compressor , 18 , oil separator , 19 , oil return capillary , 23 , reservoir , 24 , Drying filter, 25, sight glass, 26, 30, 31, 32, 33, 35, 69, 91, 98, 108, 119, 120 , 121 , 136 , expansion throttle , 34 , freezer , 36 , 68 , intermediate heat exchanger , 37 , outdoor heat exchanger , 38, 63, exhaust fans, 40, 41, 42, 43, 73, 74, 75, 76, 96, 97, 112, 113, 114, 115, 116, 117, 143, 144, 145, 146, Solenoid valve, 44, low pressure air pipe, 45, high pressure air pipe, 46, high pressure (or medium pressure) liquid pipe, 47, air supply box, 48, exhaust fan, 49, 59, 78, 84, 132, 133, 134, 139, 140, 141, fresh air valve, 50, 77, 142, return air valve, 51, 60, filter, 53 , closed partition, 54 , 93 , evaporator , 55 , humidifier , 56 , flap , 57 , air supply , 58 , 85 , air inlet valve , 61 , condenser , 62 , electric control box , 64, exhaust vent, 65, bypass valve, 66, refrigerant circulation pump, 70, 86, 87, 88, 89, 118, check valve, 71, 72 Four-way reversing valve, 79, 83, hot damper, 80, exhaust duct, 81, fresh air duct, 82, duct heat exchanger, 90, heat pipe, 92, solar heat absorber, 95 , dryer, 100, floor radiant air conditioning coil, 101, solar water heater, 103, hot water tank, 104, water pipe, 105, water condenser, 107, hot water user, 109, outdoor evaporator, 122, water - refrigerant heat exchanger, 129, solar panel hot air heater, 130, solar vacuum tube air heater, 131, solar heat pipe type air heater, 137, cooker air duct,

 Specific implementation

 Figure 1 is a system diagram of a heat recovery device, which is composed of an exhaust heat absorber 1, a drain heat absorber 2, a water storage device 3, and a room air conditioner. 4, expander 5, circulating water pump 6, electric control valve (7, 8, 9, 10), valve (11, 12, 13, 14 ), a circulating pipeline, a circulating medium, and a power distribution control system, which are sequentially connected into a circulation system. Exhaust heat absorber 1 with electric control valve 7 , drain heat absorber 2 with electric control valve 8 The two are connected in parallel in the system, and the exhaust heat absorber 1 and the drain heat absorber 2 adopt a heat exchanger in the form of a snake tube type, a spiral tube type, a tube type, a plate type, etc., and are usually made of a metal material. Exhaust heat absorber 1 It is installed in the range hood and exhaust hood, and is installed on the panel, or in the air duct and bellows, and can exchange heat with the high-temperature soot exhaust gas. Drainage absorber 2 It can be placed in a place where high-temperature washing wastewater passes, such as under the cooktop, in the kitchen drain, in the grease trap, or buried in the kitchen floor, so that it can exchange heat with high-temperature wastewater. Water storage 3 The utility model can adopt the heat exchangers of the spiral tube type, the shell tube type, the sleeve type and the plate type, and adopts the closed type pressurized container or the open type non-pressure container, wherein the electric or gas auxiliary heating device can be installed, and the figure is adopted. It is a closed pressurized container. Room air conditioner 4 and the blower 15 can be placed in the kitchen or other room requiring air conditioning, circulating indoor air or outdoor fresh air, it uses a heat exchanger in the form of fan coil, etc., made of copper tube and aluminum fins, the figure shows Two room air conditioners 4, you can set one or several units. The expander 5 may employ an expansion device such as an expansion tank or an expansion tank. The circulating water pump 6 is a variable frequency water pump. Electric control valve 7 , 8 , 9 , 10 The amount of circulating water can be adjusted automatically. The circulating pipeline is made of materials resistant to high temperature, high pressure and pollution. The circulating medium usually uses a non-toxic and harmless cleaning liquid such as water. The power distribution control system consists of a power distribution system and an automatic control system. The power distribution system is a circulating water pump. 6、Air blower 15 Provide power supply, automatic control system controls the start and stop and speed regulation of circulating water pump 6 , opening and closing and opening degree of electric regulating valve 7 , 8 , 9 , 10 , exhaust heat absorber 1 , drain heat absorber 2. The water reservoir 3 is equipped with temperature and other signal sensors to transmit temperature and other signals to the automatic control system to ensure automatic, efficient and stable operation of the system.

 The working process of the system is as follows: Water reservoir 3 Connect tap water and open electric control valve 7 , 8 , 9 , 10 The circulating water pump 6 is started, and the cold water is heated by the high-temperature soot exhaust gas in the exhaust air heat absorber 1 and heated by the high-temperature washing waste water in the drain heat absorber 2 to become hot water in the water storage device 3 The heat exchange with the tap water is cooled down by the tap water, and then turned into cold water back to the circulating water pump 6 , and the tap water is heated into hot water for the user to use, and the fuel is saved. In the winter, when the room needs to send hot air, the valve is opened. 14, electric control valve 9, hot water into the room air conditioner 4, blower 15 to send hot air to the room, the above circulation system is a closed circulation system. Normally, the water tank 3, the room air conditioner 4 The design heat load will not exceed the total waste heat load of the kitchen, but the waste heat of the kitchen is discontinuous and unstable, only the waste heat during cooking, the duration is short, and the room air conditioner 4 The heating demand is continuous and stable, so electric auxiliary heating equipment can be added in the system, or other heat sources can be introduced. The system in the figure is connected to the hot and cold water of the external air conditioning system. When heating in winter, open the valve 11 , 12 , 13 , 14 , the hot water of the external air conditioning system enters the system; when cooling in the summer, close the valves 11 , 14 , open the valves 12 , 13 , the cold water of the external air conditioning system enters the room air conditioner 4 . Gate valves, solenoid valves, electric control valves, etc. can be used for valves 11, 12, 13, and 14.

 Exhaust heat absorber 1 , Drain heat absorber 2 It can also be installed in other places with waste heat discharge, such as: kitchen exhaust duct of residential building, exhaust duct exhaust of toilet exhaust duct, public bath, household toilet discharge bathing wastewater, which contains a large amount of heat energy, and exhaust heat absorber 1 Drain heat absorber 2 can be recycled. The drain heat absorber 2 can also be installed in a solar water heating system to absorb the heat of the sun. Therefore, one or more exhaust heat absorbers 1 and drain heat absorbers 2 can be provided in the system. .

 Figure 2 is a system diagram of another thermal energy recovery device, which is a direct thermal circulation system, a water storage device 3 It is an open pressureless container (closed pressure vessel can also be used) with water temperature and water level controller. The tap water is sent to the exhaust heat absorber by the circulating water pump 6 , and the drain heat absorber 2 In the process, the heat exchange is directly exchanged with the high-temperature soot exhaust gas and the washing wastewater, and the heat exchange efficiency is improved. However, when the pipeline leaks, the tap water is easily contaminated by the high-temperature soot exhaust gas and the washing wastewater.

 Figure 3 is a system diagram of a thermal energy recovery device with a refrigeration system, which is composed of an exhaust heat absorber 1 , a drain heat absorber 2 , and a water storage device 3 , room air conditioner 4, compressor 17, expansion throttle 26, auxiliary device, circulation pipe, refrigerant refrigeration cycle system, auxiliary devices including gas-liquid separator 16 , oil separator 18 , oil return capillary 19, reservoir 23, drying filter 24, sight glass 25, etc. The high temperature refrigerant discharged from the compressor 17 is The water storage device 3 exchanges heat with the tap water, is cooled and cooled, the tap water becomes hot water, and the electric regulating valves 10, 7, and 8 are respectively adjusted to enter the room air conditioner 4, the exhaust air heat absorber 1 and the drain heat absorber 2 The flow rate of the refrigerant in the low-temperature and low-pressure refrigerant evaporates and absorbs heat in the exhaust air heat absorber 1 and the drain heat absorber 2, absorbs heat energy in the high-temperature exhaust gas and waste water, and the room air conditioner 4 and the blower 15 It can be placed in the kitchen or other places where air conditioning is required. It can be used to recycle indoor air or outdoor fresh air. It can be converted into an evaporator or a condenser to achieve cold air supply in summer, hot air in winter, and no working in the transitional season.

 When the room air conditioner 4 sends cold air in summer, close the valves 20, 22 and open the valves 21, 27, 28 The electric regulating valve 7 , 8 , 10 is turned on, the low temperature and low pressure refrigerant evaporates and absorbs heat therein, and absorbs the heat in the room air. The refrigerant circulation process is like this: the compressor 17 → Oil separator 18 → Water reservoir 3 → Valve 21 → Reservoir 23 → Dry filter 24 → Sight glass 25 → Expansion throttle 26 → Valve 27 → Electric control valve 10 → Room air conditioner 4 → Valve 28 / Electric control valve 7 → Exhaust heat absorber 1/ Electric control valve 8 → Drain heat absorber 2 → Gas-liquid separator 16 → Compressor 17 .

 When the room air conditioner 4 sends hot air in winter, close the valves 21, 27, 28 and open the valves 20, 22 The electric control valve 7 , 8 , 10 is turned on, the high temperature refrigerant is further cooled and cooled therein, and the heat is radiated to the room air. The refrigerant circulation process is like this: the compressor 17 → Oil separator 18 → Water reservoir 3 → Valve 20 → Room air conditioner 4 → Electric control valve 10 → Valve 22 → Reservoir 23 → Dry filter 24 → Sight glass 25 → Expansion throttle 26 → Electric adjustment valve 7 → Exhaust heat absorber 1/ Electric control valve 8 → Drain heat absorber 2 → Gas-liquid separator 16 → Compressor 17 .

 When the room air conditioner 4 does not work during the transition season, close the valves 20, 22, 27, 28 and open the valve 21 The electric control valve 7 and 8 are turned on, and the refrigerant circulation process is like this: the compressor 17 → Oil separator 18 → Water reservoir 3 → Valve 21 → Reservoir 23 → Dry filter 24 → Sight glass 25 → Expansion throttle 26 → Electric control valve 7 → Exhaust heat absorber 1 / Electric control valve 8 → Drain heat absorber 2 → gas-liquid separator 16 → compressor 17 .

 In the above three working conditions, the water storage device 3 can supply hot water, and when the hot air is sent in winter, the heat of the refrigerant first satisfies The demand for the water storage unit 3 may not meet the demand for the room air conditioner 4 to send hot air. Since the refrigerant is directly exchanged with the high-temperature soot exhaust gas and the washing wastewater in the exhaust heat absorber 1 and the drain heat absorber 2, it is required The temperature of the soot exhaust gas and the washing waste water should not be too high, otherwise the refrigerant return gas temperature is too high and the refrigeration system is unstable. Like the system described in Fig. 1, the exhaust heat absorber 1 and the drain heat absorber of the system 2 It can be installed not only in the kitchen or in the operating room, but also in other places where waste heat is available, especially low-grade heat energy, which can be used in systems such as ground source or water source heat pumps. Exhaust heat absorber when there is no high temperature waste heat 1 As the evaporator, it can also absorb the heat in the outdoor air. In the system, one or more exhaust heat absorbers 1 and a drain heat absorber 2 can be provided. The figure shows two room air conditioners 4 One or more room air conditioners 4 can be installed, which adopt a heat exchanger in the form of a direct expansion structure coil to ensure that the refrigerant evaporates and condenses therein, and the heat exchanger is made of copper tubes and aluminum fins. The valves 20, 21, 22, 27, 28 can be replaced with solenoid valves, and the electric regulating valves 7, 8, 10 can be replaced with expansion throttles, and then the expansion throttle 26 can be eliminated. Due to room air conditioner 4 Summer cooling, winter heating, the refrigeration system can also be called heat pump system, when the valve 20, 22, room air conditioner 4 It can only be cooled in the summer. This refrigeration system is called a single cooling system. It is suitable for the southern regions where hot air is not sent in winter. The above refrigeration system has a plurality of exhaust air heat absorbers 1 , a drain heat absorber 2 , and a room air conditioner 4 It can also be called a multi-connected refrigeration system. The expansion restrictor can be electronic expansion valve, thermal expansion valve, capillary tube, etc. The electronic expansion valve is flexible and suitable for multi-connected refrigeration system. The capillary is suitable for small capacity. Cooling System.

 The above equipment has a power distribution control system in which the power distribution system supplies power to the compressor 17, the blower 15, and the automatic control system, and the compressor 17 For variable capacity compressors, such as: variable frequency rotor type, scroll type, screw type compressor, the blower 15 is a frequency conversion speed control fan. When the system capacity is large, there are multiple room air conditioners 4, two or more units can be set. Compressor 17, when There are multiple compressors in the system. 17 When operating in parallel, the compressor 17 All of them adopt fixed-capacity compressors, or all adopt variable-capacity compressors, or a combination of variable-capacity compressors and fixed-capacity compressors. The above combination can realize variable capacity operation of refrigeration system and achieve energy saving. . The system is equipped with signal sensors such as temperature and pressure to transmit temperature, pressure and other signals to the automatic control system. The automatic control equipment is based on high temperature soot exhaust gas, washing wastewater, and water storage device. The change of indoor and outdoor air temperature automatically controls the displacement of the compressor 17, the blower 15 speed, the expansion throttle 26 and the electric regulating valve 7 , 8 , 10 The opening ensures efficient and stable operation of the refrigeration system. The automatic control system has controllers, displays, sensors, actuators, etc., usually using microcomputer control (such as PLC Controller), with autonomous setting parameters, fault detection, automatic alarm and other functions, can be controlled by the touch screen on-site, remote control through computer keyboard, mouse, and network control through LAN, Internet.

 In Figure 4, the water reservoir 3 is connected in parallel with the room air conditioner 4, and the electric control valve 9 , 29 Adjusting the flow rate of the high-temperature and high-pressure refrigerant entering the air, and the expansion throttles 30, 31, 32, and 33 are respectively adjusted to enter the room air conditioner 4, the exhaust heat absorber 1, the drain heat absorber 2, and the freezer 34 Low temperature and low pressure refrigerant flow. The freezer 34 is a refrigerator, an electric freezer, etc. For the small freezer 34, the expansion restrictor 33 is preferably a combination of a solenoid valve and a capillary. Room air conditioner 4 During summer cooling, the valve 22 is closed, the electric regulating valve 29 is opened, the valve 28 is opened, and the expansion throttle 30 is closed; when heating is performed in winter, the valve 28 is closed, the expansion throttle 30 is opened, and the valve 22 is opened. , electric control valve 29 . Valves 22, 28 can be replaced with solenoid valves.

 In Figure 5, the exhaust heat absorber 1 and the drain heat absorber 2 are indirectly connected to the refrigeration system through the intermediate heat exchanger 36, but in Fig. 3 In Fig. 4, the exhaust heat absorber 1 and the drain heat absorber 2 are directly connected to the refrigeration system, and the refrigerant directly evaporates and absorbs heat therein. Exhaust heat absorber 1 , Drain heat absorber 2 , Intermediate heat exchanger 36 , Expander 5, circulating water pump 6 is sequentially connected into a circulation system, the circulating medium usually uses non-toxic and harmless cleaning liquid such as water, exhaust air heat absorber 1 with electric regulating valve 7 , drain heat absorber 2 with electric regulating valve 8 The two are connected in parallel in the system, and one or more exhaust heat absorbers 1 and a drain heat absorber 2 may be provided. Circulating water pump 6 Transfers the heat energy of high-temperature exhaust gas and waste water to the intermediate heat exchanger 36 The low-temperature low-pressure refrigerant evaporates heat therein, passes through the refrigeration cycle, and finally transfers the heat energy to the water reservoir 3 to heat the tap water. Intermediate heat exchanger 36 Heat exchangers in the form of spiral tubes, shell tubes, sleeves, plates, etc. can be used. Room air conditioner 4 In the summer, the evaporator is used to send cold air, and in winter, it is converted into a condenser to send hot air. There are two in the picture The water storage device 3 is connected in parallel in the system, one is an open type non-pressure container, which can provide domestic hot water, and the other is a closed type pressurized container, which can be used for providing air conditioning heating and hot water, and the system can be connected with a plurality of water storage devices 3 . The system The low-temperature and low-pressure refrigerant is not directly exchanged with the high-temperature exhaust gas and waste water, but is exchanged with the intermediate medium with a lower temperature, and the refrigerant return gas temperature is not too high, which is favorable for the system to operate stably. Exhaust air heat absorber 1 For the plate heat exchanger, a water circulation guide groove is arranged in the cavity, and the exhaust heat absorber 1 can be used as a panel of the range hood and the exhaust hood, or can be placed in the box body or in the air duct.

 An outdoor heat exchanger has been added in Figure 6 37 The heat exchanger in the form of a straight-expanded structural coil ensures that the refrigerant evaporates and condenses therein, and the heat exchanger is made of a copper tube and an aluminum fin. Drain absorber 2 is directly connected to the refrigeration system and has a freezer 34 . When the water reservoir 3 does not require thermal energy heating, or when heat energy is required to be heated, the system operating conditions are as follows:

 When the water storage device 3 does not require heat energy heating, if the room air conditioner 4 sends cold air in summer, the exhaust air heat absorber 1 and the drain heat absorber 2 If it does not work, the heat of the room can be discharged to the outside through the outdoor heat exchanger 37; if the room air conditioner 4 sends hot air in winter, when there is enough waste heat available, the outdoor heat exchanger 37 does not work, and the waste heat passes through the room air conditioner 4 When it is discharged indoors, when there is not enough waste heat available, the outdoor heat exchanger 37 is converted into an evaporator to absorb the heat of the outdoor air to supplement the insufficient portion; in the transitional season, when the room does not need air conditioning, the system stops working.

 When the water reservoir 3 requires heat to be heated, if the room air conditioner 4 sends cold air in the summer, part of the waste heat is used for heating of the water reservoir 3, part of The outdoor heat exchanger 37 is discharged to the outside through the outdoor heat exchanger 37, and when there is not enough waste heat available, the outdoor heat exchanger 37 is converted into an evaporator to absorb the heat of the outdoor air, and also needs to be in the outdoor heat exchanger. Adding an expansion throttle before, this extreme situation is difficult to occur in summer; if room air conditioner 4 sends hot air in winter, part of the waste heat is used for heating of water storage unit 3, and part of it is passed through room air conditioner 4 When discharged indoors, when there is not enough waste heat available, the outdoor heat exchanger 37 is converted into an evaporator to absorb the heat of the outdoor air to supplement the insufficient portion; the transition season, the room air conditioner 4, the outdoor heat exchanger 37 If it does not work, the waste heat is used for the heating of the water storage device 3. When the waste heat is insufficient, the outdoor heat exchanger 37 is started, and the refrigeration system works.

 When there is no waste heat in winter, the room air conditioner 4 needs to send hot air. The water reservoir 3 needs to be heated (or not heated), the electromagnetic valve 40 is opened, the electric regulating valve 39 is closed, and the outdoor heat exchanger 37 is turned into an evaporator to absorb the heat energy of the outdoor air. The refrigerant circulation process is such that the compressor 17 → Oil separator 18 → Electric control valve 9 → Water reservoir 3 → Valve 22 / Electric control valve 29 → Room air conditioner 4 → Expansion throttle 30 → Sight glass 25 → Dry filter 24 → Reservoir 23 → Outdoor heat exchanger 37 → Solenoid valve 40 → gas-liquid separator 16 → compressor 17 . When there is no hazard of freezing in winter, you can also cancel the solenoid valves 40, 41, open the range hood, exhaust hood fan, and use Exhaust heat absorber 1 absorbs the heat of the outdoor air.

 The heat recovery unit in Figure 7 is connected to the three-regulated heat recovery multi-unit heat pump air conditioning unit as the end of the air conditioning system. Exhaust heat absorber 1. Drain heat absorber 2, Freezer 34 Directly connected to low pressure air pipe 44, high pressure (or medium pressure) liquid pipe 46; Water reservoir 3 is connected to high pressure gas pipe 45, high pressure (or medium pressure) liquid pipe 46; room air conditioner 4 is connected to low pressure air pipe 44, high pressure air pipe 45, high pressure (or medium pressure) liquid pipe 46, solenoid valve 42 , 43 control room air conditioner 4 Conversion of cooling or heating mode; it has a heat pump heat recovery air conditioning unit, which is composed of a blowing box 47 and a exhaust box 48, which can recover the cooling capacity in the indoor exhaust air while sending fresh air to the room. And heat, evaporator 54 and condenser 61 are connected across the three control systems, evaporator 54 cools fresh air in summer, and winter converts to condenser to heat fresh air, condenser 61 In the summer, the indoor air is exhausted, and the cooling capacity in the exhaust air is absorbed. In winter, the air is cooled into an evaporator to cool the indoor exhaust, and the heat in the exhaust air is absorbed. In the above system, some equipment is being cooled, while some equipment is being heated, and the waste heat discharged is recycled.

 In Figure 8, the exhaust air heat absorber 1 and the drain heat absorber 2 are indirectly connected to the low pressure air pipe through the intermediate heat exchanger 36. , high pressure (or medium pressure) liquid pipe 46.

 Figure 7 and Figure 8 show the heat recovery unit as the end of the air conditioning system, connected to the three-control heat recovery type. On the multi-unit heat pump air conditioning system, it can also be connected to a two-regulated heat recovery type multi-unit heat pump air conditioning system, or connected On the water ring heat pump air conditioning system, or connected to other air conditioning refrigeration systems with heat recovery.

 In Figure 9, a refrigerant circulation pump 66 is added. When the exhaust gas and waste water temperature are too high, the compressor 17 is shut down and the valve is closed. The refrigerant circulating pump 66 is started, and the low-temperature liquid refrigerant is sent to the exhaust heat absorber 1 and the drain heat absorber 2 is heated and heated, and is cooled by the water storage device 3 to be cooled, returned to the liquid storage device 23, and then enters. In the refrigerant circulation pump 66, a cycle of heat recovery is completed, and the valve 67 can be changed to a solenoid valve.

 Figure 10 is a two-stage refrigeration system The heat recovery unit system diagram has two sets of primary and secondary refrigeration systems to form secondary heat transfer, and the two pass through the intermediate heat exchanger. Connected, it acts as a condenser for the primary refrigeration system and as an evaporator for the secondary refrigeration system. The heat energy can be raised to 55 °C or higher by the secondary energy, and the water temperature of the primary refrigeration system is increased by 15 °C or more. The intermediate heat exchanger 68 may be a heat exchanger of a spiral tube type, a shell tube type, a sleeve type, a plate type or the like, and the exchange medium is a refrigerant-refrigerant or a refrigerant-water-refrigerant.

 Figure 11 is a system diagram of a heat recovery unit with a heat pump system, which adds The four-way reversing valves 71, 72 realize the conversion of the heating or cooling mode of the room air conditioner 4 and the outdoor heat exchanger 37 by the steering of the two. The cycle shown in the figure is a refrigeration cycle, and the room air conditioner 4 is cooling. The outdoor heat exchanger 37 is heating. whether What is the operating mode of the heat pump system? The exhaust heat absorber 1 and the drain heat absorber 2 are always in the cooling mode, and the water storage device 3 is always in the heating mode. In the figure, there are two compressors 17, two room air conditioners 4 working in parallel. When the system capacity is large and there are multiple room air conditioners 4, two or more compressors 17 can be set. When there are multiple compressors in the system. Machine 17 When operating in parallel, the compressors 17 all use fixed-capacity compressors, or all of them use variable-capacity compressors, or a combination of variable-capacity compressors and fixed-capacity compressors. To achieve the purpose of energy saving. The electric regulating valve 10 can be changed to an expansion restrictor to cancel the expansion restrictor 30.

 The solenoid valves 73, 74, 75, 76 in Figure 12 replace the four-way reversing valve 72 in Figure 11. When the solenoid valve 73, 74 open, when the solenoid valves 75, 76 are closed, the system performs the refrigeration cycle; when the solenoid valves 73, 74 are closed, the solenoid valves 75, 76 When turned on, the system performs a heating cycle.

 The above heat pump system can also replace the solenoid valve with a one-way valve 73, 74, 75, 76 To achieve the conversion of cooling and heating modes.

 Figure 13 is a heat recovery unit with a wind-to-wind heat exchanger, which is a heat pump system with a duct heat exchanger 82 It is made of metal air duct. The air of different temperatures exchanges heat when it flows inside and outside. The outdoor fresh air with lower temperature is heated by the high temperature exhaust gas to recover the heat energy in the exhaust gas. The operating conditions of the system are as follows:

 In the summer, when the water reservoir 3 needs to be heated, the heat comes from the heat of the high temperature exhaust gas, the indoor air, the outdoor air, and the freezer 34. When there is In the case of high-temperature exhaust gas, the outdoor air is heated by the high-temperature exhaust gas in the duct heat exchanger 82, passes through the hot damper 83, the exhaust fan 38, and is further exchanged with the outdoor heat exchanger 37. At this time, the outdoor heat exchanger 37 is an evaporator. Absorbing the heat of the outdoor air, passing through the refrigeration cycle, transferring heat to the water reservoir 3; When there is no high temperature exhaust gas, if the room air conditioner 4 is used, the fresh air valve 78 and the return air valve 77 are opened to absorb the heat of the indoor or outdoor air. If the room air conditioner 4 is not used, open the fresh air valve 84, The outdoor heat exchanger 37 absorbs heat of the outdoor air. The freezer 34 can also provide heat to the reservoir 3.

 In the summer, when the water reservoir 3 does not require heating, the heat of the freezer 34 and the indoor air passes through The outdoor heat exchanger 37 is discharged to the outside.

 In the winter, when the water reservoir 3 needs to be heated, the heat is derived from the heat of the high temperature exhaust gas, the indoor air, the outdoor air, and the freezer 34. When there is In the case of high-temperature exhaust gas, the outdoor air is heated by the high-temperature exhaust gas in the duct heat exchanger 82, passes through the hot damper 83, the exhaust fan 38, and is further exchanged with the outdoor heat exchanger 37. At this time, the outdoor heat exchanger 37 is an evaporator. The heat of the outdoor air is absorbed, and the heat is transferred to the water storage device 3 through the refrigeration cycle. If the room air conditioner 4 sends hot air to the room at this time, when the heat of the high temperature exhaust gas is insufficient, The fresh air valve 84 is opened, and the outdoor heat exchanger 37 simultaneously absorbs heat from the high temperature exhaust gas and the outdoor air; when there is no high temperature exhaust gas, if the room air conditioner 4 is used, the fresh air valve 78, 84, and the return air valve are opened. 77. The air inlet valve 85 and the outdoor heat exchanger 37 absorb the heat of the indoor and outdoor air. If the room air conditioner 4 is not used, the fresh air valve 84 is opened, and the outdoor heat exchanger 37 Absorbs the heat of the outdoor air. The freezer 34 can also provide heat to the reservoir 3.

 In the winter, when the water reservoir 3 does not need to be heated, the outdoor heat exchanger 37 absorbs the heat of the high temperature exhaust gas and the outdoor air for the air conditioner, or The outdoor air is heated by the high-temperature exhaust gas in the duct heat exchanger 82, and is sent to the room through the hot damper 79 and the blower 15, and the heat of the refrigerator 34 is used for air conditioning or discharge to the outside.

 During the transition season, when the water reservoir 3 needs to be heated, the heat comes from the heat of the high temperature exhaust gas, the indoor air, the outdoor air, and the freezer 34. When there is In the case of high-temperature exhaust gas, the outdoor air is heated by the high-temperature exhaust gas in the duct heat exchanger 82, passes through the hot damper 83, the exhaust fan 38, and is further exchanged with the outdoor heat exchanger 37. At this time, the outdoor heat exchanger 37 is an evaporator. Absorbing the heat of the outdoor air, passing through the refrigeration cycle, transferring heat to the water reservoir 3; When there is no high temperature exhaust gas, the fresh air valve 84 is opened, and the outdoor heat exchanger 37 absorbs the heat of the outdoor air. The freezer 34 can also provide heat to the reservoir 3.

 During the transition season, when the water reservoir 3 does not require heating, the equipment stops working.

 The various dampers in the above figure are electric air volume control valves, and the opening and closing and opening degrees are controlled by an automatic control system.

 Figure 14 Stroke - The wind heat exchanger is a heat pipe 90, and the outdoor fresh air and high temperature exhaust gas pass through the heat pipe 90 The heat exchange is carried out to recover the heat energy in the exhaust gas, and the operating conditions of the system are the same as those shown in Fig. 13. The solenoid valves 74, 75 in the figure replace the check valves 87, 88.

 Figure 15 is a three-regulated heat recovery type multi-unit heat pump air conditioning system with solar energy, with an exhaust heat absorber 1 , a water storage device 3 , room air conditioner 4, solar heat absorber 92, dryer 95, etc. Solar heat absorber 92 with evaporator 93, in which the refrigerant directly evaporates and absorbs solar energy, evaporator 93 For the structure of the tube type, the plate type, etc., the solar heat absorber 92 can be made into a box type, a flat type, and a vacuum tube type. The dryer 95 may be a dryer, a hand dryer, which is a thermal energy using a high temperature refrigerant.

 Figure 16 with exhaust air heat absorber 1 , room air conditioner 4 , solar heat sink 92 , floor radiant air conditioning system, etc. In the floor radiant air conditioning system, the water storage device 3 supplies cold water in summer, hot water supply in winter, through circulating water pump 99, floor radiant air conditioning coil 100 It supplies cold to the room in the summer and heat in the winter.

 Figure 17 is a thermal energy recovery device with a solar energy and refrigeration system. The solar water heater 101 provides solar hot water and is stored in a hot water tank. In the 103, the drain heat absorber 2 absorbs the heat of the solar hot water in the hot water tank 103, and the exhaust heat absorber 1 absorbs the heat of the high temperature exhaust gas, and supplies heat to the water storage device 3 and the room air conditioner 4. solar water heaters 101 can be used flat, vacuum tube, heat pipe, etc., room air conditioner 4 for summer cooling, winter heating.

 In Fig. 18, the hot water tank 103 replaces the water reservoir 3 in Fig. 17, and the high temperature refrigerant passes through the water condenser 105. The tap water is heated, and the solar water heater 101 can also heat the tap water, and the circulating water pump 106 supplies hot water to the hot water user 107.

 In Fig. 19, an outdoor evaporator 109 is provided which can absorb the heat of the outdoor air and heat the hot water tank 103. The heat energy of the tap water comes from outdoor air, high temperature exhaust gas, solar energy. The system does not have a room air conditioner 4 , it is a single cold refrigeration system and is only used to provide hot water.

 In Fig. 20, when the solar energy is sufficient, the refrigeration system stops working, the electric regulating valve 110, the electromagnetic valves 112, 113 When the other valves are closed, the circulating water pumps 102, 106 are started, the solar water heater 101 is used to produce hot water, or the refrigeration system is also started at the same time, the exhaust heat absorber 1 and the outdoor evaporator 109 Work, electric control valves 110, 111, solenoid valves 112, 113, 114 open, other valves closed, circulating water pumps 102, 106 start, use water reservoir 3 Simultaneous production of hot water with solar water heater 101, rapid heating; when solar energy is insufficient, start refrigeration system, exhaust heat absorber 1, drain heat absorber 2, outdoor evaporator 109 work, electric control valve 110, solenoid valves 115, 116, 117 are open, other valves are closed, circulating water pumps 102, 106 are started, using water storage 3 and solar water heater 101 production Hot water; when there is no solar energy, such as night or cloudy, start the refrigeration system, exhaust air heat absorber 1 , outdoor evaporator 109 work, solenoid valves 115, 116, 117 Open, the other valves are closed, the circulating water pump 10 is started, and the hot water is produced by the water reservoir 3.

 In Fig. 21, the solar heat absorber 92 replaces the solar water heater 101, starts the refrigeration system, and is produced by the water condenser 105. Hot water.

 Figure 22 is a thermal energy recovery unit with a solar and heat pump system that can be a hot water user 107 Hot water is provided, air-conditioned rooms can also be supplied with air-conditioning hot and cold water, water-refrigerant heat exchangers 122 Air-conditioning cold water is provided in summer and air-conditioning hot water is provided in winter. In the drawing, the expansion restrictors 119, 120, 121 are electronic expansion valves, the compressor 17 is a screw compressor, and the electronic expansion valve 121 sprays a coolant into the chamber of the compressor 17.

 Figure 23 with solar panel hot air 129, solar vacuum tube hot air heater 130, solar heat pipe hot air heater 131 . In the solar panel type air heater 129, there is a heat absorbing plate which absorbs solar energy and then heats up to heat the cold air entering it; the solar vacuum tube type air heater 130 Usually made of glass vacuum tube, the inner tube and the outer tube are vacuum, the outer tube is transparent, the inner tube is provided with heat absorbing coating, absorbs solar energy, and the cold air is heated by the solar energy after passing through the inner tube; the solar heat pipe type air heater 131 With a heat pipe, its heat-absorbing end is inserted in a glass vacuum tube to absorb solar energy, and the heat-dissipating end is inserted in the air duct, and the cold air is heated by the heat-dissipating end. In this way, the cold air can be directly sent to the air-conditioned room after being heated by the solar air heater, or the solar energy is absorbed by the refrigeration system, and the hot air or hot water is indirectly provided to the user through the refrigeration cycle. In the cooking process, fuel combustion requires oxygen in the air. The higher the air temperature, the more fully the fuel burns, the higher the thermal efficiency, and the heated outdoor fresh air passes through the cooker air duct. 137 is sent to the cooker for fuel combustion. The expansion restrictor 136 of the refrigeration system is a bi-directional expansion restrictor which greatly simplifies the refrigeration system in the water reservoir 135. The external refrigerant passes through a heat exchanger in the form of a spiral coil to cool the high-temperature gaseous refrigerant into a liquid refrigerant, and can be stored therein, and the water reservoir 135 can be used as a liquid storage device.

 In Figure 24, the solar vacuum tube type air heater 130 provides hot air for the room, exhaust air heat absorber 1 and drainage heat absorber 2 With two solenoid valves, the two can be converted from evaporator to condenser, using waste cold air and waste cold water to discharge excess heat from the refrigeration system.

 In summary, when the exhaust heat absorber 1, the drain heat absorber 2, and the water storage device 3 are installed on the uncooled system, it is suitable for recovering high-temperature waste heat. Exhaust heat absorber 1, drain heat absorber 2 can be directly or indirectly connected to any air conditioning refrigeration system that can be connected, water storage 3 It can be connected to any refrigeration system that has waste heat emissions available, and the heat recovery unit with refrigeration system is more suitable for recycling low-grade waste heat. The heat recovery device is usually a variable capacity system. With the changes in load and usage functions, the automatic control system can be precisely adjusted to ensure efficient operation of the system.

The above description is only a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, and modifications made to the above embodiments in accordance with the technical spirit of the present invention are within the scope of the present invention.

Claims (10)

1. A heat energy recovery device, which is composed of an exhaust heat absorber, a drain heat absorber, a water storage device, a room air conditioner, an expander, a circulating water pump, a circulation pipe, a circulating medium, and a power distribution control system, wherein The exhaust heat absorber, the drain heat absorber, the water storage device, the room air conditioner, the expander, the circulating water pump are sequentially connected into a circulation system, and the circulating medium absorbs the waste heat in the high temperature exhaust gas in the exhaust heat absorber, and absorbs heat in the drain The waste heat in the high-temperature wastewater is absorbed by the circulating water pump, and the heat energy is transferred to the water storage device to heat the tap water to make it into hot water, and the heat energy is sent to the room air conditioner, and the hot air can be sent to the room to exhaust the air. The heat absorber and the drain heat absorber have a regulating valve, and the two are connected in parallel in the system, and one or more exhaust heat absorbers and drain heat absorbers may be provided, which are not only installed in the kitchen, but also installed in the Other places where waste heat is available, the circulating water pump is a variable frequency water pump, and the circulation system is a closed circulation system or an open circulation system. In the open circulation system, there is no expander, when the circulation system is connected to the external space. When the system heat source, capable of supplying hot air in the room air conditioner, it is possible to send cold air. 2. Thermal energy recovery device, which is composed of exhaust air heat absorber, drain heat absorber, water storage device, room air conditioner, compressor, expansion throttle, auxiliary device, circulation pipe, refrigerant, power distribution control system Refrigeration system, characterized in that the exhaust heat absorber and the drain heat absorber are directly or indirectly connected in the refrigeration system, and when the two are directly connected in the refrigeration system, they act as evaporators, relying on evaporation of low temperature liquid refrigerant Endothermic, absorbing high temperature exhaust gas, waste heat in waste water, both with refrigerant regulator, parallel in the system, when the two are indirectly connected to the refrigeration system through the intermediate heat exchanger, they have a regulating valve, connected in parallel In the system, the intermediate heat exchanger, the expander and the circulating water pump are sequentially connected into a circulation system, and the circulating medium absorbs the waste heat in the high-temperature exhaust gas in the exhaust heat absorber, and absorbs the waste heat in the high-temperature waste water in the drain heat absorber. Under the action of the circulating water pump, the heat energy is transferred to the intermediate heat exchanger, and the intermediate heat exchanger acts as an evaporator in the refrigeration system, and relies on the evaporation of the low-temperature liquid refrigerant to absorb the heat. The waste heat from the heat absorber and the drain heat absorber is then sent to the water storage device and the room air conditioner through the refrigeration cycle, the tap water is heated, and the hot air is sent to the room. The circulating water pump is a variable frequency water pump, and one or more can be set. The exhaust air heat absorber and the drain heat absorber are not only installed in the kitchen, but also can be installed in other places where waste heat is available. The water storage device is connected as a condenser in the refrigeration system, and relies on high temperature gaseous refrigerant. Heating tap water, it can also be used as a liquid storage device for the refrigeration system. The water storage device is a closed pressurized container or an open pressureless container. One or more water storage devices can be installed in the refrigeration system, and the room air conditioner acts as an evaporation device. Connected to the refrigeration system, relying on the evaporation heat of the low-temperature liquid refrigerant to send cold air to the room, the room air conditioner can also be converted into a condenser, relying on high-temperature gaseous refrigerant to send hot air to the room, the refrigeration system can be equipped with one or several The room air conditioner, the refrigeration system is a variable capacity system, and the heat recovery device can realize variable capacity operation. 3. The thermal energy recovery device according to claim 2, wherein the refrigeration system is a single cooling system, or a heat pump system, or a multi-connected system, or a heat recovery type multi-connected heat pump system. 4. A thermal energy recovery device according to claim 2 wherein the refrigeration system can be provided with an outdoor heat exchanger which can be used as a condenser or as an evaporator. The thermal energy recovery device according to claim 2, wherein the exhaust heat absorber and the drain heat absorber are used as the end of the air conditioning refrigeration system, and can be directly or indirectly connected to any air conditioning refrigeration system that can be connected, and stored. The water unit can be connected to any refrigeration system that has waste heat emissions available. 6. The thermal energy recovery apparatus according to claim 2, wherein the refrigeration system is provided with a refrigerant circulation pump, and the refrigerant transfers thermal energy under the action of the refrigerant circulation pump when the compressor is stopped. The thermal energy recovery device according to claim 2, characterized in that it can have two sets of primary and secondary refrigeration systems, and the tap water in the water storage device is heated into high temperature hot water by secondary heat transfer. 8. A thermal energy recovery device according to claim 2 wherein the refrigeration system can be provided with a freezer. 9. A thermal energy recovery device according to claim 2, characterized in that it can be provided with a wind-wind heat exchanger for absorbing thermal energy in the high temperature exhaust gas. The thermal energy recovery device according to claim 2, characterized in that it can be equipped with a solar heat absorber, a solar water heater or a solar heat heater, and the solar heat absorber absorbs solar energy as an evaporator of the refrigeration system through the refrigeration cycle. Providing heat to users, solar water heaters and solar air heaters generate solar hot water and hot air respectively, directly providing heat energy to users, or indirectly providing heat energy to users after circulating through the refrigeration system.

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