WO2013135136A1 - Kitchen heat-recycling air conditioning system - Google Patents

Abstract

A kitchen heat-recycling air conditioning system consisting of a refrigeration system, a ventilation system, and a power distribution control system. The refrigeration system is provided not only with a room air conditioner, which is capable of delivering cooled/heated air, but also with an exhaust heat absorber and a water heater. The exhaust heat absorber is arranged in an apparatus for exhausting high-temperature exhaust gas, such as exhaust hoods and smoke extraction hoods, for use in heat exchange with high-temperature exhaust gases such as fumes. The exhaust heat absorber is provided therein with water or a refrigerant, and collects the heat discharged from a kitchen to the water heater, thus providing a user with domestic hot water, while at the same time conserving fuel. The apparatus combines the features of air conditioning, water heating, and fume exhausting, is an environmentally friendly product that recycles heat, conserves energy, and reduces emission, and is widely applicable in fields such as households, restaurants, and canteens.

Description

 Air conditioning system for recycling kitchen heat

 Technical field

 The invention belongs to the field of air conditioning refrigeration, and particularly relates to an air conditioning system for recovering thermal energy of a kitchen.

 Background technique

In the process of food cooking, the kitchen consumes a large amount of fuel and generates a large amount of high-temperature soot. The soot is discharged to the outside by the range hood and the exhaust hood. The heat is also discharged, and there is no recycling. At the same time, it needs to be used. Heat energy heats washing hot water and air conditioning hot water, thus wasting a lot of energy.

 The existing air conditioning system can only send hot and cold air with a single performance.

 Summary of the invention

 It is an object of the present invention to provide a more sophisticated air conditioning system capable of recovering thermal energy from a kitchen.

The solution of the present invention is that the air conditioning system for recovering kitchen heat energy is composed of a refrigeration system, a ventilation system, and a power distribution control system. The refrigeration system not only has a room air conditioner, but also can send hot and cold air, and also has an exhaust air heat absorber. It is installed in a range hood, a exhaust hood, and the like to remove high-temperature exhaust gas, and is heated with high-temperature exhaust gas such as oil smoke. Exchange, the exhaust heat absorber is filled with water or refrigerant, and the heat discharged from the kitchen is collected into the water heater through the circulation of the circulating water pump or the refrigeration system to provide the user with washing hot water and save fuel. The air conditioning system can be widely used in homes, small restaurants, canteens and the like.

 DRAWINGS

 Figure 1 is an air conditioning system for recycling kitchen heat (1)

 Figure 2 is an air conditioning system diagram for recycling kitchen heat (2)

 Figure 3 is an air conditioning system diagram for recycling kitchen heat (3)

 Figure 4 is an air conditioning system diagram for recycling kitchen heat (4)

 Figure 5 is an air conditioning system for recycling kitchen heat (5)

 Figure 6 is an air conditioning system diagram for recycling kitchen heat (6)

 Figure 7 is an air conditioning system for recycling kitchen heat (7)

 Figure 8 is an air conditioning system diagram for recycling kitchen heat (8)

 Figure 9 is an air conditioning system for recycling kitchen heat (9)

 Figure 10 is an air conditioning system diagram for recycling kitchen heat (10)

 Figure 11 is an air conditioning system for recycling kitchen heat (11)

 Figure 12 is an air conditioning system for recycling kitchen heat (12)

 Figure 13 is an air conditioning system for recycling kitchen heat (13)

 Figure 14 is an air conditioning system for recycling kitchen heat (14)

 Figure 15 is an air conditioning system for recycling kitchen heat (15)

 Figure 16 is an air conditioning system for recycling kitchen heat (16)

 Figure 17 is an air conditioning system for recycling kitchen heat (17)

 Description of the reference signs:

 1, compressor, 2, water heater, 3, 28, four-way reversing valve, 4, 52, exhaust heat absorber, 5, outdoor Heat exchanger, 6 , 11 , 50 , fan , 7 , 9 , 21 , drying filter , 8 , 19 , expansion throttle , 10 , room air conditioner , 12 , Gas-liquid separator, 13, 14, 37, 38, 41, 42, 43, electric control valve, 15, 16, 17, 18, check valve, 20, sight glass, 22, reservoir, 23, Oil return capillary, 24, oil separator, 25, 29, circulating water pump, 26, expander, 27, intermediate heat exchanger, 30, 32, 44, hot water heater, 31, 39, 40, 45, 46, 53, solenoid valve, 33, 47, heat pipe heat exchanger, 34, Fume exhaust pipe, 35, 51, duct heat exchanger, 36, 49, exhaust smoke hood, 48, hot air duct,

 Specific implementation

 Figure 1 is a A diagram of the air conditioning system that recycles the heat of the kitchen. The figure shows the refrigeration system, as well as the ventilation system and the distribution control system. The refrigeration system consists of a compressor 1, a water heater 2, a four-way reversing valve 3, an exhaust heat absorber 4, and an outdoor Heat exchanger 5, drying filter 7, 9, expansion throttle 8, room air conditioner 10, gas-liquid separator 12, fan 6, 11, auxiliary device, automatic control device, circulation line, refrigerant Composition, they are sequentially connected into a circulating refrigeration system, usually as a component system, or as a whole system to provide hot and cold air and hot water for air-conditioned rooms. The ventilation system consists of exhaust fume equipment, air ducts, fans, heat exchangers, soot filters, etc. Air conditioning systems provide both wind and heat sources. The power distribution control system consists of a power distribution system and an automatic control system. It provides power to the refrigeration system and the ventilation system, and controls the system to operate automatically.

 In a refrigeration system, room air conditioners 10 It can also be called an indoor unit. It acts as an evaporator and a condenser, and recycles indoor air or outdoor fresh air to send cold and hot air to the room. It uses a heat exchanger in the form of a direct expansion structure coil to ensure that the refrigerant is in it. Evaporation or condensation, usually made of copper tubes and aluminum fins. Outdoor heat exchanger 5 It can also be called an outdoor unit. It acts as a condenser and evaporator to dissipate heat to the outside or absorb heat from the outside. It uses a heat exchanger in the form of a straight-expanded structural coil to ensure that the refrigerant condenses or evaporates therein. Made of copper tube and aluminum fins. compressor 1 Usually variable capacity compressors are used, such as variable frequency rotor type, scroll type, etc. When the system cooling capacity and heating capacity change, the compressor 1 also changes capacity output in time to realize variable capacity energy saving operation. Expansion throttle An electronic expansion valve, a capillary tube or the like can be used, and the expansion restrictor 8 is a capillary tube, which is suitable for a small system. Auxiliary device includes four-way reversing valve 3, drying filter 7 , 9 , gas-liquid separator 12 , Oil separators, oil return capillaries, accumulators, sight glass, and equipment such as subcoolers and regenerators. The automatic control unit includes a solenoid valve, an electric control valve, a pressure sensor, a temperature sensor, and the like.

 In the refrigeration system, the exhaust heat absorber 4 Any type of heat exchanger such as serpentine tube, spiral tube type, tube type, plate type, etc., usually made of metal material, installed in household range hood, restaurant exhaust hood, or installed in soot exhaust duct In the position of the bellows, it can exchange heat with high-temperature exhaust gas such as oil smoke or indoor cold air. In the figure, the exhaust heat absorber 4 is connected in series with the outdoor heat exchanger 5, and when the refrigeration system is a refrigeration cycle, the exhaust heat absorber 4 It can be used as a condenser. When it is in the non-cooking period and there is no high-temperature soot exhaust gas, the ventilation system only discharges the indoor exhaust gas, and the high-temperature and high-pressure gaseous refrigerant can pass through the exhaust air heat absorber. The condensation is exothermic and is discharged to the outside by the ventilation system. When it is in the cooking period, the ventilation system discharges the high-temperature soot exhaust gas, and the condensation heat of the refrigerant can only pass through the outdoor heat exchanger. When the refrigeration system is in the heating cycle, the exhaust heat absorber 4 is converted into an evaporator, and the low-temperature and low-pressure liquid refrigerant evaporates and absorbs heat therein, absorbing heat in the high-temperature soot exhaust gas or the indoor exhaust air.

 In the refrigeration system, the water heater 2 It consists of a box body, a cold water inlet pipe, a hot water outlet pipe, a hot water heater, a water level controller, a temperature controller, etc. The box body is a closed pressure vessel or an open type pressureless vessel, and the outer casing is insulated, and the casing can be installed therein. Auxiliary heating device for electricity, gas, solar energy, etc., the open type pressureless container in the figure, the hot water heater can adopt any structure heat exchanger such as spiral tube type or serpentine tube type, when high temperature refrigerant or heat medium passes When heating the tap water in the tank.

 In the distribution control system, the distribution system is the compressor 1, the fan 6, 11 , the water heater 2, the exhaust fumes The fan and the like provide power. The automatic control 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 device is based on the high temperature soot exhaust gas, the water temperature and water level of the water heater 2, The change of indoor and outdoor air temperature, etc., automatically controls the displacement of the compressor, the opening and closing of the fan, and ensures the efficient and stable operation of the refrigeration system and the ventilation system. The automatic control system has controllers, displays, sensors, actuators, etc., which can be controlled by remote controllers or by 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.

 The above refrigeration system is based on the existing split air conditioner to add a water heater 2 and an exhaust heat absorber 4 The utility model has the advantages of simple structure and can be divided into two parts: a water heater 2, an exhaust heat absorber 4, an outdoor heat exchanger 5, a room air conditioner 10, a compressor 1 and the like, and an outdoor heat exchanger 5 Concentrated into one, each part is connected by a quick connector, similar to the existing split air conditioner installation.

 The air conditioning system mainly has three operating conditions: sending cold air, sending hot air, and separately making hot water.

 When the cold air is sent in summer, the room air conditioner 10 serves as an evaporator to send cold air to the room, the outdoor heat exchanger 5, and the exhaust heat absorber 4 As a condenser to dissipate heat to the outside, the refrigerant circulation process is: compressor 1 → water heater 2 → four-way reversing valve 3 → exhaust air absorber 4 →Outdoor heat exchanger 5→Drying filter 7→Expansion restrictor 8→Drying filter 9→ Room air conditioner 10→Four-way reversing valve 3→Gas-liquid separator 12→Compressor 1 . In this process, the high-temperature refrigerant can heat the tap water in the water heater 2. When there is no cooking time, there is no waste heat, the exhaust fan only excludes the room exhaust, and some or all of the air-conditioning condensation heat can first pass through the exhaust heat absorber. 4 It is discharged to the outside, and the rest is discharged to the outside through the outdoor heat exchanger 5. When it is cooking, the heat of condensation can only be discharged to the outside through the outdoor heat exchanger 5.

 When the hot air is sent in winter, the room air conditioner 10 is converted into a condenser to send hot air to the room, the outdoor heat exchanger 5, and the exhaust heat absorber 4 Converted to evaporator to absorb heat from outdoor or soot waste heat, four-way reversing valve 3 reversing, refrigerant circulation process is: compressor 1 → water heater 2 → four-way reversing valve 3 → room air conditioner 10 → Drying filter 9 → Expansion restrictor 8 → Drying filter 7 → Outdoor heat exchanger 5 → Exhaust heat absorber 4 → Four-way switching valve 3 → Gas-liquid separator 12 → Compressor 1 . In this process, the water heater 2 Usually stopped, high-temperature refrigerant is used to meet the needs of room air conditioner 10 to send hot air, if the water heater is also satisfied 2 The need for heating can only increase the system capacity. When there is no cooking time, there is no waste heat, the outdoor heat exchanger 5 absorbs heat from the outdoor air. When it is cooking, there is soot waste heat, and the exhaust heat absorber 4 is from the smoke. Heat absorption, fan 6 No work, or the fan 6 is running, the outdoor heat exchanger 5, the exhaust heat absorber 4 work at the same time, respectively, absorb heat from the outdoor air and soot.

 When in the transitional season, the operating conditions of the air conditioning system are similar to those described above.

 When the hot water is separately produced, the air conditioning system is in the heating operation condition, and the working condition when the hot air is sent in the above winter, but the fan 11 Do not work, do not send hot air to the room, the condensation heat of the refrigerant is all used to heat the tap water in the water heater 2.

 In Fig. 2, the outdoor heat exchanger 5 and the exhaust heat absorber 4 are connected in parallel in the refrigeration system, and the electric regulating valves 13 and 14 Or the solenoid valve controls the operation of both. When there is waste heat available, the exhaust heat absorber 4 works, otherwise it does not work, and the mutual interference between the two is small, which is beneficial to the stable operation of the system. System is provided The sight glass 20, the accumulator 22, the one-way expansion restrictor 19, the check valves 15 , 16 , 17 , 18 for the condition change are suitable for a system with a large capacity.

 In Fig. 3, the outdoor heat exchanger 5 is eliminated, and the exhaust heat absorber 4 is indirectly connected to the refrigeration system through the intermediate heat exchanger 27, and the exhaust heat absorber 4, circulating water pump 25, expander 26, intermediate heat exchanger 27, circulating pipeline, circulating medium to form a closed heat transfer cycle system, can also be made into an open circulation system, intermediate heat exchanger 27 can be used Heat exchangers in the form of spiral tubes, shell tubes, plates, etc., ensure that the circulating medium and the refrigerant are fully heat exchanged, and the expander 26 uses an expansion tank or a water tank. The circulating medium is usually clean water. The absorption of waste heat of the soot and the condensation heat of the refrigerant completely depend on the exhaust heat absorber 4 and the water heater 2. When the summer is cooled and at the cooking time, the exhaust heat absorber 4 usually does not work. The heat of condensation of the refrigerant is completely discharged by the tap water flowing through the water heater 2; when it is heated in winter and at the cooking time, the exhaust heat absorber 4 absorbs the waste heat of the soot, and the intermediate heat exchanger 27 is converted into an evaporator, the water heater 2 Usually no hot water is produced, and the condensation heat of the refrigerant is completely used to send hot air to the room. Because the system is simple, it can be made into an integral unit, and all the equipments are integrated and easy to install. The system is suitable for high temperature emissions of soot. A restaurant or canteen that has a long working hours per day and a large amount of tap water.

 In Fig. 4, the exhaust heat absorber 4 is connected in parallel with the outdoor heat exchanger 5 through the intermediate heat exchanger 27 in the refrigeration system, the water heater 2 A closed pressurized container is used.

 In Fig. 5, the intermediate heat exchanger 27 is integrated with the water heater 2, and the exhaust heat absorber 4 is passed through the water heater 2 Indirectly connected to the refrigeration system, there is a hot water heater in the water heater 2, one is the water-water hot water heater 30, the exhaust heat absorber 4, the circulating water pump 25, the expander 26, the hot water heater 30 The circulating pipeline and the circulating medium constitute a closed circulation system for the transfer of waste heat of the oil smoke, and the other is a water-refrigerant hot water heater, which serves as a condenser of the refrigeration system to the water heater 2 In the middle of the heat release, it can also be converted into an evaporator, which absorbs heat from the water heater 2 and is used for winter heating operation. Circulating water pump 29 Accelerating water heater 2 Internal water circulation, heat exchange efficiency is improved, solenoid valve 31 The tap water is controlled to enter the water heater 2, and the outdoor heat exchanger 5 and the water heater 2 are connected in series in the refrigeration system.

 In Figure 6, the outdoor heat exchanger 5 is connected in parallel with the water heater 2 in the refrigeration system.

 In Figure 7, another type of hot water heater, heat pipe heat exchanger 33, is provided in the water heater 2, which acts as a wind-water heat exchanger and is inserted into the heat absorption end. In the soot exhaust pipe 34, the waste heat of the oil smoke is absorbed, and the heat release end is inserted into the water heater 2 to heat the tap water. The hot water heater 32 is a water-refrigerant hot water heater which acts as a condenser of the refrigeration system to the water heater 2 In the middle of the heat release, it can also be converted into an evaporator that absorbs heat from the water heater 2. The outdoor heat exchanger 5 is connected in series with the water heater 2 in the refrigeration system.

 In Figure 8, the water heater 2 is integrated with the kitchen exhaust fume hood 36 in the water heater 2 There are two hot water heaters, one is a wind-water duct heat exchanger 35, which runs through the water, one side is water, the other side is high temperature oil fumes, the tap water is heated; the other is water-refrigerant heat Water heater 32, In parallel with the outdoor heat exchanger 5 in the refrigeration system, it acts as a condenser for the refrigeration system, releasing heat to the water heater 2, which can also be converted into an evaporator to absorb heat from the water heater 2. The exhaust fume hood 36 can be made into a double-layered structure with a water chamber to make the water and soot waste heat exchange more complete.

 In Figure 9, when the water heater 2 needs refrigerant heating, the electric regulating valve 37 and the solenoid valve 39 are opened, and the refrigeration system needs to absorb the water heater. When the heat in 2 is turned on, turn on the electric regulator valve 43 and the solenoid valve 40. An exhaust air heat absorber 4 is added to the soot exhaust pipe 34 to absorb heat from the heat pipe after the heat pipe heat exchanger 33 absorbs heat.

 In Figure 10, a water-refrigerant hot water heater 44 is added to the water heater 2 when the electric control valve is opened. The high temperature refrigerant passes through it to heat the tap water. When the system uses the refrigeration system to separately produce hot water in winter, it will not be restricted and the use is more convenient.

 In Figure 11, the water heater 2, the circulating water pump 29, and the exhaust heat absorber 4 form an open circulation system, and the water heater 2 The cold water in the middle is sent to the exhaust heat absorber 4 for direct heating, and the heat transfer efficiency is high, but when the exhaust heat absorber 4 is perforated, the hot water is easily contaminated.

 In Fig. 12, the outdoor heat exchanger 5 and the water heater 2 are connected in parallel in the refrigeration system, and the cold water in the water heater 2 can pass through the circulating water pump. The power cycle or natural circulation is heated in the exhaust heat absorber 4.

 In Fig. 13, the water heater 2 is integrated with the exhaust fume hood 49 through the heat pipe heat exchanger 33, and the heat pipe heat exchanger 33 The heat absorbing end is inserted into the soot exhaust duct 34 to absorb the waste heat of the soot, and the heat releasing end is inserted into the water heater 2 to heat the tap water. And added heat pipe heat exchanger 47, hot air pipe 48, fan 50 Through the heat transfer of the heat pipe heat exchanger 47, the high temperature soot exhaust gas heats the outdoor fresh air, or the indoor return air, or the indoor exhaust air, and then is sent back to the room, or sent to the outdoor heat exchanger 5, the fan 6 Inhalation, when used in winter heating operation conditions, the refrigerant evaporates and absorbs heat, so that waste heat can be better recycled.

 In Figure 14, the heat pipe heat exchanger 47 is replaced. The duct heat exchanger 51 passes through the high-temperature soot exhaust gas on one side of the duct and the heated air on the other side, and the two directly exchange heat, and the waste heat is recycled.

 Figure 15 is a relatively simple and practical The air-conditioning system, because of its simple system, can be made into an integral unit, all of which are integrated and easy to install.

 Figure 16 is a simpler and more practical air conditioning system that eliminates the outdoor heat exchanger 5 and makes it easier to make an integral unit.

 In Figure 17, an exhaust air heat absorber 52 is added, which communicates with the water heater 2, closes the solenoid valve 31, and opens the solenoid valve. The tap water in the water heater 2 is heated by natural circulation of hot water.

In summary, the air conditioning system for recycling kitchen heat energy is a combination of air conditioners and household range hoods or restaurant exhaust smoke systems. It combines the functions of air conditioning, hot water and oil fume, and is a heat energy recovery, energy saving and emission reduction. Environmentally friendly products.

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. The air conditioning system for recycling kitchen heat energy is composed of a refrigeration system, a ventilation system, and a power distribution control system, and is characterized in that the refrigeration system consists of a room air conditioner, an outdoor heat exchanger, a water heater, an exhaust heat absorber, a compressor, and an expansion throttle. Components, auxiliary devices, automatic control devices, circulation lines, refrigerants, which are sequentially connected into a circulating refrigeration system, which sends hot and cold air to the air-conditioned rooms, recovers waste heat from the kitchen, and provides hot water. The ventilation system is provided by the kitchen exhaust fume equipment. The heat exchanger and other related equipment are used to discharge high-temperature exhaust gas such as kitchen fumes and recover the heat energy therein. The power distribution control system is composed of a power distribution system and an automatic control system, which provides power and control for the refrigeration system and the ventilation system. The system runs automatically.
2. The air conditioning system for recycling kitchen heat energy according to claim 1, wherein the air conditioning system can be a unitary or integral unit.
3. The air conditioning system for recycling kitchen heat energy according to claim 1, wherein the exhaust air heat absorber of the refrigeration system is installed in a kitchen exhaust fume device or other location for recovering heat energy in the kitchen fume or indoor exhaust air, It can be directly or indirectly connected to the refrigeration system, in series or parallel relationship with the outdoor heat exchanger, it can be an evaporator, can also be converted into a condenser, or other heat exchangers, it can be replaced by any structure Heater.
4. The air conditioning system for recycling kitchen heat energy according to claim 1, wherein the water heater of the refrigeration system adopts an open type pressureless container or a closed pressurized container, wherein the hot water heater is equipped with a high temperature refrigerant and a kitchen. The waste heat or other auxiliary energy in the exhaust gas heats the hot water, and the hot water heater can adopt a heat exchanger of any structure.
5. The water heater according to claim 4, wherein when the water heater is integrated with the kitchen exhaust fume device, the hot water heater with the waste heat of the soot waste heat can also be used with the high temperature refrigerant or Other auxiliary energy sources heat the hot water heater, so that it can not only remove the soot, but also produce hot water.
6. The water heater according to claim 4, wherein when the water heater is connected in series or in parallel with the outdoor heat exchanger on the refrigeration system, a hot water heater for heating the hot water by the high temperature refrigerant is installed therein, which can also be condensed The device is converted into an evaporator, which can absorb the heat energy of the hot water, and the water heater can also be equipped with a hot water heater that uses the waste heat of the soot or other auxiliary energy to heat the hot water.
7. The water heater according to claim 4, wherein the water heater is provided with two sets of hot water heaters for heating hot water by using a high temperature refrigerant, wherein one group can be converted from a condenser to an evaporator, capable of absorbing heat energy of the hot water. .
8. The exhaust heat absorbing device according to claim 3 and the water heater according to claim 4, wherein when the exhaust heat absorbing device is indirectly connected to the refrigeration system through an intermediate heat exchanger or a water heater, An open circulation system that recycles waste heat from the kitchen to a refrigeration system or water heater.
9. The air conditioning system for recycling kitchen heat energy according to claim 1, wherein the refrigeration system can be provided without an outdoor heat exchanger, and the heat absorption or heat release during the circulation of the refrigeration system is completely completed by the exhaust air heat absorber and the water heater. .
10. The air conditioning system for recycling kitchen heat energy according to claim 1, wherein the ventilation system is provided with a hot air duct and a heat energy recovery device for recovering heat energy in the kitchen fumes or indoor exhaust.

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