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WO2012152199A1 - Climatiseur pour récupération de chaleur à partir d'une pompe à chaleur - Google Patents

Climatiseur pour récupération de chaleur à partir d'une pompe à chaleur Download PDF

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Publication number
WO2012152199A1
WO2012152199A1 PCT/CN2012/074960 CN2012074960W WO2012152199A1 WO 2012152199 A1 WO2012152199 A1 WO 2012152199A1 CN 2012074960 W CN2012074960 W CN 2012074960W WO 2012152199 A1 WO2012152199 A1 WO 2012152199A1
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WIPO (PCT)
Prior art keywords
air
heat pump
box
pump system
exhaust
Prior art date
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PCT/CN2012/074960
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English (en)
Chinese (zh)
Inventor
荣国华
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Individual
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
    • F24F12/003—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid using a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56—Heat recovery units

Definitions

  • the invention belongs to the field of HVAC, and particularly relates to an air conditioning unit that uses a heat pump for heat energy recovery.
  • the object of the present invention is to provide a heat recovery air conditioning unit with reasonable structure, hygienic cleaning and sufficient energy saving.
  • the heat pump heat recovery air conditioning unit is composed of a blower box, a blower box, a heat pump system and a power distribution control system.
  • the air supply box is composed of a fresh air outlet, a return air outlet, a filter, a blower, an evaporator, an air supply port, and an additional functional section.
  • the exhaust fan is composed of an air inlet, a fresh air outlet, a filter, a condenser, an exhaust fan, an air outlet, and an additional functional section.
  • the heat pump system consists of a compressor, a condenser, an expansion throttle, an evaporator, and an auxiliary device.
  • the power distribution control system is composed of power distribution equipment and automatic control equipment.
  • the indoor exhaust air and the outdoor fresh air are used to cool the condenser of the heat pump system in the air exhaust box, and the cooling capacity is absorbed by the condenser.
  • the outdoor fresh air and the indoor return air are cooled and cooled by the evaporator of the heat pump system and sent to the air-conditioned room. In this way, the cooling capacity in the indoor exhaust air is recovered and utilized by the refrigeration cycle of the heat pump system.
  • the condenser of the heat pump system in the exhaust fan is converted into an evaporator. Since the indoor air temperature is higher than the outdoor, the indoor exhaust air and the outdoor fresh air are used to heat the evaporator of the heat pump system in the exhaust fan, and the heat is evaporated. Absorbed. In the blower box, the evaporator of the heat pump system is converted into a condenser, and the outdoor fresh air and the indoor return air are heated by the condenser and sent to the air-conditioned room. In this way, the heat in the indoor exhaust air is recovered and utilized by the heating cycle of the heat pump system.
  • the power distribution equipment of the power distribution control system provides power for the heat pump system, the blower, the exhaust fan, the electric air volume adjustment air outlet, and the automatic control equipment.
  • the automatic control equipment automatically adjusts the heat pump system, the blower, the exhaust fan, and the electric motor according to the changes of indoor and outdoor air parameters.
  • the air volume adjusts the operating state of the tuyere to ensure efficient and stable operation of the air conditioning unit.
  • Figure 1 is a structural diagram of a connected heat pump heat recovery air conditioning unit (1)
  • Figure 2 is a structural diagram of a split heat pump heat recovery air conditioning unit
  • Figure 3 is a heat pump system diagram
  • Figure 4 is a heat pump system diagram
  • Figure 5 is a heat pump system diagram (3)
  • Figure 6 is a structural diagram of a heat exchanger unit for heat recovery of a heat pump (2)
  • Figure 8 is a heat pump system diagram (5)
  • Figure 9 is a heat pump system diagram (6)
  • Figure 10 is a heat pump system diagram (7)
  • Figure 11 is a structural diagram of a heat exchanger unit for heat recovery of a heat pump (3)
  • Figure 13 is a heat pump system diagram (9)
  • Figure 14 is a structural diagram of a multi-unit heat pump heat recovery air conditioning unit (1)
  • Figure 16 is a structural diagram of a multi-unit heat pump heat recovery air conditioning unit ( 2 )
  • Figure 17 is a structural diagram of a multi-unit heat pump heat recovery air conditioning unit (3)
  • Figure 18 is a heat pump system diagram (11)
  • Figure 20 is a heat pump system diagram ( 13 )
  • Figure 21 is a heat pump system diagram ( 14 )
  • Figure 22 is a heat pump system diagram ( 15 )
  • Figure 23 is a heat pump system diagram ( 16 )
  • Figure 24 is a heat pump system diagram ( 17 )
  • Figure 26 is the construction diagram of the cylinder piston type accumulator
  • Figure 27 is a diaphragm type reservoir construction diagram
  • Figure 28 shows the connection between the shared reservoir and the bidirectional expansion throttle in the heat pump system ( 1 )
  • Figure 30 shows the connection between the shared reservoir and the bidirectional expansion throttle in the heat pump system (3)
  • Figure 31 shows the connection between the shared reservoir and the bidirectional expansion throttle valve in the heat pump system ( 4 )
  • Figure 1 is a structural diagram of a connected heat pump heat recovery air conditioning unit, which is provided by a blower box 1 and a blower box 2
  • the heat pump system and the power distribution control system are composed of four parts.
  • the box body is made of steel plate and other materials, and is insulated with a heat insulating material such as polyurethane.
  • An inspection door is provided on the cabinet to facilitate access and maintenance of the personnel.
  • Air supply box 1 Disconnected from the exhaust box 2 by the partition 7 and placed with insulation material to prevent hurricane and heat exchange between fresh air and exhaust air.
  • Air supply box 1 , air exhaust box 2 Can be made in one piece, the required equipment is installed in a complete box, the integrated air conditioning unit is not convenient to transport, install and repair, but saves materials; can also be made into a segmented combination, with different functions
  • the equipment is placed in several functional sections, and is made into a number of small boxes, which are assembled into a whole after being on the scene.
  • air box In 1 , the fresh air outlet 3, the return air outlet 4, and the filter 5 are made into the inlet air mixing filter section, and so on, and can be made into a blower section, an evaporator section, and a humidifying and blowing section.
  • Air exhaust box 2 It can be made into the inlet air mixing filter section, the condenser section, the heat pump main unit, the electric control box section and the exhaust fan section. Each section can be disassembled for easy transportation, installation and overhaul.
  • Other functional sections may be added as needed, such as an additional electric heating section, an air disinfection section, an anechoic section, an inspection section, and the like.
  • the main part of the heat pump system (compressor 17 and other equipment) can be placed in the box or outside the box, evaporator 8 and condenser 16
  • the equipment such as the refrigerant circulation pipe 9 is located in the casing.
  • a heat exchanger in the form of a straight-expanded structural coil is used to ensure that the refrigerant evaporates and condenses therein, and the heat exchanger is made of a copper tube and an aluminum fin.
  • Electrical control box for distribution control system 18 It is equipped with controller, display, power distribution equipment, etc., which can be hung outside the box, or embedded in the box, or separated from the box. Various power distribution and control equipment and pipelines are distributed in the box. Crossing the partition 7 All kinds of pipelines should be sealed to prevent air leakage.
  • the outdoor high temperature and high humidity fresh air and indoor return air are under the action of the blower 6, from the fresh air outlet 3
  • the return air inlet 4 enters the box, mixes and is filtered by the filter 5, filtered by the filter 5, passed through the blower 6 , cooled by the evaporator 8 , cooled and dehumidified, after reaching the set temperature and humidity, from the air supply port 12 It is sent to the air-conditioning area; in the air exhaust box 2, the outdoor fresh air and the indoor exhaust air enter the tank from the air inlet 13 and the fresh air outlet 14 under the action of the exhaust fan 19, and are mixed by the filter 15
  • the dust removal filter is heated by the condenser 16, heated, and discharged to the outside through the exhaust fan 19 and the exhaust port 20.
  • the heat pump system performs a refrigeration cycle, and in the blower box 1, the evaporator 8 The heat is evaporated and the air is cooled and dehumidified.
  • the condenser 16 is cooled by the indoor and outdoor air, and the cooling capacity in the indoor exhaust is recycled.
  • the outdoor low temperature fresh air and the indoor return air are under the action of the blower 6, from the fresh air outlet 3 and the return air outlet. 4 Enter the box, mix and filter by dust filter 5, pass the blower 6 and pass the evaporator 8 to heat up. If the humidity is low, humidifier 10 is needed to humidify. After reaching the set temperature and humidity, pass the water retaining plate. 11 From the air supply port 12 to the air conditioning area; in the air exhaust box 2, the outdoor fresh air and the indoor exhaust air are driven by the exhaust fan 19, enter the box from the air inlet 13 and the fresh air outlet 14, and are mixed by the filter.
  • the heat pump system stops running, and the return air outlet 4 in the air supply box 1 is closed, and the fresh air outlet 3 and the air supply port 12 Open, blower 6 operation; fresh air outlet in the air exhaust box 2 14 closed, air inlet 13 , side air vent 21 , air vent 20 open, exhaust fan 19 Operation, air conditioning unit for new wind operation.
  • the side vent 21 is connected to the indoor exhaust air like the air inlet 13 to reduce the exhaust resistance caused by the condenser 16 and reduce the power consumption of the exhaust fan 19.
  • the power distribution equipment of the power distribution control system is the heat pump system, the blower 6 , and the exhaust fan 19
  • the electric air volume adjustment air outlet and the automatic control system provide power.
  • the heat pump system is a variable capacity system
  • the compressor 17 is a variable capacity compressor
  • the blower 6 and the exhaust fan 19 are frequency conversion speed control fans
  • the fresh air outlets 3, 14 , return air inlet 4 air inlet 13 for electric air volume adjustment air outlet, manual or electric dual-purpose air volume adjustment air outlet, side air vent 21 It is not commonly used, it can be set as manual air outlet, or it can be set as manual and electric dual-purpose air volume adjustment air outlet.
  • the automatic control device controls the compressor according to changes in indoor and outdoor air parameters.
  • FIG. 2 is a structural diagram of a split heat pump heat recovery air conditioning unit, the air supply box 1 and The exhaust fan box 2 is separated, and when the device is shipped from the factory, the refrigerant circulation pipe 9 connected to the main body of the heat pump system by the evaporator 8 or the condenser 16 is disconnected and sealed, and various types of lines connected to the electric control box 18 are also disconnected.
  • the refrigerant circulation pipe 9 is connected through the quick joint, and various types of lines are connected to the electric control box 18.
  • the two cabinets can be placed in different positions according to the needs of the user, and the arrangement is more flexible.
  • the air exhaust box 2 can be placed on the roof to save floor space and reduce the noise of the unit.
  • An air supply vent 22 can be added to the air supply box 1 to reduce the air supply resistance.
  • FIG. 3 is a diagram of the heat pump system of the above heat pump heat recovery air conditioning unit, which is a refrigeration cycle.
  • the refrigerant cycle process is this: compressor 17 ⁇ Oil separator 24 ⁇ water cooler 25 ⁇ four-way switching valve 26 ⁇ condenser 16 ⁇ four-way switching valve 27 ⁇ accumulator 28 ⁇ drying filter 29 ⁇ sight glass 30 ⁇ expansion throttle 31 ⁇ four Through the reversing valve 27 ⁇ evaporator 8 ⁇ four-way reversing valve 26 ⁇ gas-liquid separator 32 ⁇ Compressor 17 .
  • the high-pressure, high-temperature gaseous refrigerant discharged from the compressor 17 is separated from the lubricating oil in the oil separator 24, and the lubricating oil is returned to the compressor through the oil return capillary 23
  • the lubricant can also be reflowed by other means.
  • tap water enters The water cooler 25 absorbs the heat of the high-temperature refrigerant and becomes hot water, which can provide customers with domestic hot water and save fuel costs.
  • the heat of the refrigerant is absorbed by the tap water, the amount of fresh air for condensing the refrigerant can be reduced, and the power consumption of the exhaust fan 19 is lowered.
  • the water cooler 25 can be cancelled or turned off, and the heat of the refrigerant is exhausted by the indoor exhaust air and the outdoor fresh air.
  • the water cooler 25 can be in the form of a spiral tube type, a shell tube type, a sleeve type or the like, and a closed type pressurized container or an open type pressureless container is used. Compressor 17 The closer the exhaust port is, the better the heat recovery effect. image 3
  • the medium water cooler 25 is connected in series on the refrigerant pipe. Since the refrigerant is uncontrollable, the water temperature in the water cooler 25 is also difficult to control, and it is preferably used as a water supply preheater for the internal hot water system of the building.
  • the expansion restrictor 31 usually employs an electronic expansion valve to adjust the flow rate of the refrigerant relatively quickly and accurately, and other expansion restrictors, such as capillary tubes, can be used for small systems.
  • the compressor 17 employs a variable capacity compressor such as a variable frequency rotor type, a scroll type, or a screw type compressor. When the system cooling capacity and the heating capacity change, the compressor 17 also changes the capacity output in time to achieve energy-saving operation. when There are multiple compressors in the heat pump system. 17 When operating in parallel, the compressor 17 All of the fixed capacity compressors, or all of the variable capacity compressors, or a combination of variable capacity compressors and fixed capacity compressors, can achieve variable capacity operation. To achieve the purpose of energy saving.
  • auxiliary devices such as the oil separator 24, the four-way switching valve 26, 27, the accumulator 28, the drying filter 29, the sight glass 30, and the gas-liquid separator 32
  • other auxiliary equipment such as heat recovery is provided. , recooler, temperature, pressure sensor, etc.
  • the automatic control system automatically adjusts the operating status of the system according to changes in system temperature and pressure, and maintains efficient operation of the heat pump system.
  • the heat pump system performs a heating cycle, after the four-way switching valves 26, 27 are turned, the evaporator 8 becomes a condenser, and the condenser 16 becomes an evaporator.
  • the refrigerant cycle process is this: compressor 17 ⁇ Oil separator 24 ⁇ water cooler 25 ⁇ four-way switching valve 26 ⁇ evaporator 8 ⁇ four-way switching valve 27 ⁇ accumulator 28 ⁇ drying filter 29 ⁇ sight glass 30 ⁇ expansion throttle 31 ⁇ four Through the reversing valve 27 ⁇ condenser 16 ⁇ four-way reversing valve 26 ⁇ gas-liquid separator 32 ⁇ Compressor 17 .
  • the water cooler 25 stops working, does not produce hot water, the refrigerant dissipates heat in the evaporator 8, and is used to heat the outdoor fresh air, and absorbs heat in the condenser 16, absorbs the heat of the indoor exhaust air and the outdoor fresh air, and recycles the indoor Exhaust heat. If the water cooler 25 can also produce hot water in winter, it is necessary to increase the system capacity and increase the heat generation, such as increasing the power of the compressor 17, increasing the amount of fresh air outside the exhaust box 2, and the amount of exhaust air of the exhaust fan 19. . In the winter, the water cooler 25 is suitable for use in the south, while in the north, the outdoor temperature is low, and when the water cooler 25 is in operation, The heat pump system is inefficient.
  • the apparatus with the water cooler 25 described above may also be referred to as a hot water type heat pump heat recovery air conditioning unit.
  • the heat pump system When the outdoor temperature in winter is low and the indoor exhaust air volume is small, the heat pump system performs a heating cycle, and the condenser 16 acts as an evaporator to easily frost, in order to melt the frost,
  • the water cooler 25 stops the output of the hot water, but the hot water is supplied to the water cooler 25 by an external heat source (boiler, electric heat, etc.), and the water cooler 25 becomes a water heater to supply heat for the refrigerant to evaporate.
  • an external heat source blower, electric heat, etc.
  • the water cooler 25 becomes a water heater to supply heat for the refrigerant to evaporate.
  • open the air inlet of the bellows 2 13 ⁇ Close the fresh air outlet 14 open the electric control valve 37, close the electric control valve 38, and use the indoor exhaust air to melt the frost. At this time, it does not affect the normal operation of the air conditioning system.
  • FIG 6 is a structural diagram of another type of heat pump heat recovery air conditioning unit, which differs from the above air conditioning unit in that a reheater is added to the air supply box 1. 43.
  • a reheater is added to the air supply box 1. 43.
  • Heating can increase the air supply temperature, reduce the air supply temperature difference, improve the air conditioning comfort, and is suitable for air conditioning with high air conditioning precision and humidity.
  • the device can also be constructed as a split heat pump heat recovery air conditioning unit as shown in Figure 2.
  • FIG 7 is a diagram of the heat pump system of the apparatus shown in Figure 6.
  • the reheater 43 is connected in parallel with the condenser 16 in the system, and the electric control valve 44 45, according to the load change situation, adjust the refrigerant flow into the reheater 43, the condenser 16, when the winter heating cycle, the electric control valve 44 is closed, the reheater 43 does not work.
  • Electric control valve 44, 45 One of them can be assigned to a solenoid valve to distribute the refrigerant flow.
  • the reheater 43 is constructed in the same manner as the evaporator 8 and the condenser 16.
  • the device with reheater 43 described above can also be called Reheat heat pump heat recovery air conditioning unit.
  • FIG 8 is a heat pump system diagram of another reheat heat pump heat recovery air conditioning unit, shown in the refrigeration cycle, valves 46, 49, 50 Open, valves 47, 48, 51 are closed. It and Figure 7 The difference is that the reheater 43 can be converted into an evaporator. When the evaporator 8 is inoperable, the valves 46, 49, 50, the electric regulating valve 44 are closed, and the reheater 43 is used as a backup. When cooling, close valve 48 and open the valve 47, 51, the reheater 43 is converted into an evaporator; when heating, the valve 47 is closed, the valves 48, 51 are opened, and the reheater 43 is converted into a condenser.
  • solenoid valves 33, 34, 35, 36 replace the heat pump system of Figure 8.
  • Four-way reversing valve 27 In the heat pump system shown in Figure 9, solenoid valves 33, 34, 35, 36 replace the heat pump system of Figure 8.
  • FIG 11 is another conjoined The heat pump heat recovery air conditioning unit structure diagram, which differs from the above air conditioning unit in that there are two sets of refrigeration systems. One of them is a heat pump system for cooling or heating the air; the other is a single cooling system for reheating the cooled air. The system can also be used as a heat pump system for both reheating and cooling. It is a backup to the former, and although the equipment is added, the reliability is improved. The device can also be made into a picture 2 The split heat pump heat recovery air conditioning unit shown. The above equipment can also be called a two-machine heat pump heat recovery air conditioning unit.
  • Figure 12 is a heat pump system diagram of a multi-unit heat pump heat recovery air conditioning unit, showing a refrigeration cycle.
  • Two compressors 17 are operated in parallel, and the refrigerant can flow in both directions in the expansion restrictors 52, 53, 54.
  • the condenser 16 is housed in the exhaust box 2, and the evaporator 8 is installed in the blower box 1. It has a bellows 2 and condenser 16 , can connect two and several air blowers 1 and evaporator 8 , and other equipment. Only the two air blowers 1 and evaporator 8 and one room air conditioner are shown in Figure 12 . , a water cooler 25 .
  • Room air conditioner 55 Housed in an air-conditioned room, it uses a heat exchanger in the form of a straight-expanded structural coil, made of copper tubing and aluminum fins, which rely on direct evaporation or condensation of the refrigerant to circulate cooling or heat the air in the room.
  • air box 1 and air box 2 can be called the system's additional equipment, or the end equipment, there are other additional equipment that uses the refrigerant to cool or heat, such as: the bathroom's hand dryer, can use the condensation heat of the refrigerant; use the building's sewage, Equipment for cooling refrigerant in the summer, heating the refrigerant in the winter; equipment for heating the refrigerant by using the kitchen fumes, waste heat of washing the waste water; equipment for heating the refrigerant by using the solar hot water or the hot air.
  • the bathroom's hand dryer can use the condensation heat of the refrigerant; use the building's sewage, Equipment for cooling refrigerant in the summer, heating the refrigerant in the winter; equipment for heating the refrigerant by using the kitchen fumes, waste heat of washing the waste water; equipment for heating the refrigerant by using the solar hot water or the hot air.
  • the air supply box 1 In the air-conditioned area served, when there are enough additional devices such as room air conditioners 55, the air supply box 1 does not have a return air outlet 4 or closes the air return port 4 and only sends fresh air.
  • Water cooler 25 Parallel in the system, when the water temperature reaches the set temperature, the solenoid valve 57 is closed, the high temperature refrigerant is turned off, the solenoid valve 58 is opened, the high temperature refrigerant is passed, and the solenoid valves 57, 58 It can also be changed to an electric control valve to allow the refrigerant to pass through the two valves in proportion.
  • the exhaust fan 2 is usually placed outdoors, called an outdoor unit (since the exhaust box 2 can be placed indoors, it can also be called an indoor unit), and the indoor exhaust is concentrated to the exhaust box. 2 in.
  • an outdoor unit since the exhaust box 2 can be placed indoors, it can also be called an indoor unit
  • the indoor exhaust is concentrated to the exhaust box. 2 in.
  • two or more exhaust ducts 2 and condensers 16 can be made, and several air blowers 1 and evaporators 8, additional equipment, water coolers 25 and other indoor units, water coolers 25 can be connected. It can also be placed outdoors, called an outdoor unit.
  • the operating conditions of several evaporators 8 are the same, either cooling or heating, and therefore, it can be called the same-type heat pump system.
  • FIG 13 is a heat pump system diagram of another multi-heat pump heat recovery air conditioning unit, which adds a reheater to the air supply box 1 And a water cooler 25 is provided in parallel with the condenser 16 in the system, and the electric flow regulating valve 44 is used to regulate the refrigerant flow.
  • the evaporator 8 and the room air conditioner in the two blower boxes 1 are 55 It can be cooled at the same time and heated at the same time.
  • the two blower boxes 1 can also be heated one by one while the other is refrigerated, wherein the reheater 43 in the cooled blower box 1 is converted into an evaporator for cooling, Evaporator in the same box 8 Not working.
  • Figure 14 is a structural diagram of a multi-unit heat pump heat recovery air conditioning unit.
  • the air exhaust box 2 is placed outdoors, the air inlet 13 and the side air vent 21 When the indoor air is exhausted, the condenser 16 can also be converted into an evaporator to absorb the indoor heat and the cold heat in the outdoor fresh air.
  • the compressor 17 is placed in the box body and can also be placed outside the box.
  • Multiple air vents can be set 2 Parallel use; the exhaust fan 59 is different from the above-mentioned exhaust fan 2, it does not have a compressor 17, fresh air outlet 14, only handles indoor exhaust, condenser 16 It can also be converted into an evaporator to recover the cold heat in the indoor exhaust air.
  • FIG. 14 The middle part is split type, so that the arrangement is more flexible and convenient; in the air supply box 1, the evaporator 8 can also be converted into a condenser, and the reheater 43 can also be converted into an evaporator or a condenser.
  • Air exhaust box 2, 59, The blower box 1, the room air conditioner 55, and the water cooler 25 are connected to the low pressure air pipe 60, the high pressure air pipe 61, and the high pressure (or medium pressure) liquid pipe 62.
  • the water cooler 25 is placed outdoors, which is a heat-insulated pressurized container equipped with a refrigerant radiator.
  • FIG. 15 is a heat pump system diagram of the multi-unit heat pump heat recovery air conditioning unit shown in Figure 14.
  • Solenoid box 2 solenoid valve 65 open, solenoid valve 66 Shutdown, condenser 16 heating; solenoid valve 65 closed, solenoid valve 66 open, condenser 16 cooled.
  • Solenoid valve 68 opens, high temperature refrigerant passes The water cooler 25 heats the water, and when the water temperature reaches the set temperature, the solenoid valve 68 is closed. When the condenser 16 needs to be defrost, the solenoid valve 68 is closed and the solenoid valve 69 is opened.
  • the water cooler 25 is converted into a water heater to which a heat source is supplied from the outside.
  • the solenoid valve 70 is open, the solenoid valve 71 is closed, the condenser 16 is heating, the solenoid valve 71 is open, and the solenoid valve is 70 Shut down, condenser 16 is cooled.
  • the blower box 1 has a reheater 43 which controls the flow rate of the refrigerant, and controls the solenoid valves 73, 74 and the reheater 43. It can also be converted to an evaporator or condenser for use with the evaporator 8 for backup.
  • the reheater 43 is connected to the high pressure gas pipe 61 and the high pressure (or medium pressure) liquid pipe 62. Solenoid valve 73 When the solenoid valve 74 is closed, the reheater 43 is heated; the solenoid valve 73 is closed, the solenoid valve 74 is opened, and the reheater 43 is cooled.
  • Solenoid valve 76 open, solenoid valve 75 closed, evaporator 8 Cooling; solenoid valve 76 is closed, solenoid valve 75 is open, and evaporator 8 is heated.
  • Mode Converter 78 Controls the conversion of room air conditioners 55 to cooling and heating conditions.
  • the system shown in Figure 15 is a three-control system, evaporator 8, reheater 43, condenser 16 and room air conditioner 55.
  • the air supply box 1 sends cold air, and the evaporator 8 Refrigeration, reheater 43 heating; room air conditioner 55 heating, it is not in an air conditioning area with the air supply box 1; the air exhaust box 59 absorbs heat, the condenser 16 is cooled; the water cooler 25 heats; 2 Endothermic, where the condenser 16 is cooled (whether it is cooling or heating, it needs to be executed by the operation and judgment of the automatic control system).
  • Multi-junction heat pump systems are also known as heat recovery heat pump systems. For example, in the office building with a deeper depth, in the winter, the outer zone needs to send hot air, and the inner zone needs to send cold air. This equipment can meet the requirements.
  • Figure 16 is a structural diagram of another multi-unit heat pump heat recovery air conditioning unit, a set of air supply boxes 1 and air exhaust boxes 2 placed outdoors (also indoors)
  • the heat pump system has more than three room air conditioners 55, which are three-regulated heat recovery type heat pump systems.
  • FIG 17 is a structural diagram of another multi-heat pump heat recovery air conditioning unit, which replaces the outdoor unit exhaust box 2 in Figure 14 with an outdoor unit. 79. It is composed of a condenser 16, an exhaust fan 80, a compressor 17, a refrigerant circulation pipe 9, a refrigeration system auxiliary device, an electric control box 18, and the like, and an outdoor unit 79 Without indoor exhaust, the outdoor air is cooled or heated by the exhaust fan 80, and the heat energy of the indoor exhaust is recovered by the indoor unit exhaust fan 59 responsible, the unit is suitable for indoor air ducts that are inconvenient to lead out to the outside, or where there is no indoor exhaust.
  • Figure 18 is a heat pump system diagram of a multi-unit heat pump heat recovery air conditioning unit, including a condenser 16 of the outdoor exhaust box 2, and an indoor exhaust box The condenser 16 of 59, the evaporator 8 of the blower 1 and the reheater 43, the room air conditioner 55, and the water cooler 25.
  • the system is undergoing a heating cycle, the reheater 43
  • the room air conditioner 55, the water cooler 25 are heating
  • the condenser 16 and the evaporator 8 are being cooled, and the heat is transferred to the room air conditioner 55 by the evaporator 8 through the circulation.
  • the internal heat is recycled.
  • This system is also called heat recovery type.
  • the heat pump system unlike the three control systems described above, is a two-control system that connects multiple units through a gas line and a high pressure liquid line.
  • the heat pump system shown in Figure 19 is undergoing a refrigeration cycle, and the electronic expansion throttle valve 91 is open, 92 When the heating cycle is performed, the electronic expansion throttle valve 91 is closed and 92 is opened.
  • the high-pressure liquid refrigerant exchanges heat with the low-temperature gas refrigerant, which can save energy, and the compressor 17 is screwed.
  • the rod compressor a part of the high-pressure liquid refrigerant is throttled by the electronic expansion throttle valve 93, and then lowered into a low-pressure low-temperature liquid, which is injected into the compressor 17 chamber for cooling.
  • the heat pump system shown in Fig. 20 is undergoing a heating cycle, and the expansion restrictor 97 is a two-way valve, and the accumulator 28 and the water cooler 98 are eliminated. It can be used as a liquid storage device in which high-temperature and high-pressure gas refrigerant is cooled into liquid refrigerant by cooling water (or cold air).
  • solenoid valve 99 is opened, 100 is closed, and vice versa, solenoid valve is used.
  • 99 closed, 100 open, solenoid valve 99, 100 can be used electric throttle valve or electric three-way control valve, water cooler 98 should use spiral tube, shell and tube heat exchanger.
  • the heat pump system shown in Fig. 21 is undergoing a heating cycle, and a reservoir 28 is connected behind the water cooler 101.
  • the high temperature and high pressure gaseous refrigerant is cooled by the cooling water (or cold air) into a liquid refrigerant in the water cooler 101, and then flows into the accumulator 28, and the low temperature gaseous refrigerant from the evaporator 8 or the condenser 16 passes through the solenoid valve.
  • 102 Entering the water cooler 101 it is also possible to cool the high temperature and high pressure gaseous refrigerant.
  • the water cooler 101 should adopt a double spiral tube heat exchanger, and the solenoid valve 102, 103 An electric control valve or an electric three-way control valve can be used.
  • the heat pump system shown in Fig. 22 is in a refrigeration cycle, the expansion throttle 97 is a two-way valve, and the compressor 17 is a screw.
  • the rod type compressor opens the solenoid valve 104, and a part of the high-pressure liquid refrigerant is throttled by the capillary expansion throttle valve 105, and then lowered into a low-pressure low-temperature liquid, which is injected into the compressor 17 chamber for cooling.
  • the heat pump system shown in Fig. 25 is undergoing a refrigeration cycle with a cylinder piston type accumulator 113.
  • the structure and working principle are shown in Fig. 28. .
  • Figure 26 is a structural view of a cylinder piston type reservoir, which is composed of a cylinder housing 114, a piston 115, a cylinder end cover 118, 123, a refrigerant circulation pipe 119, 120, 121, 122, etc., which is installed in the refrigerant circulation line between the evaporator 8 and the condenser 16, the refrigerant circulation pipe 119, 122 is connected to the drying filter 29, and then connected to the evaporator 8 and the condenser 16, respectively, and the refrigerant circulation pipes 120 and 121 are connected to the bidirectional expansion restrictor 97, and the refrigerant circulation pipe is connected.
  • the piston 115 has an orifice tube 116 and a small amount of high pressure liquid refrigerant can be supplied from the orifice tube 116 Throttle to the low pressure side, there is also a small amount of high pressure liquid refrigerant throttling from the clearance between the piston 115 and the cylinder wall to the low pressure side.
  • the expansion throttle 97 When the system is running at low load, the expansion throttle 97 is closed, and the system relies on the orifice tube 116 throttling operation, or without orifice 170, the system relies entirely on the expansion throttle 97.
  • Orifice tube 116 The ends can be bent with a small tube, which can be made of elastic material, and a heavy object is placed at the mouth to keep it hanging forever, and extends below the liquid level of the refrigerant to ensure liquid cooling at the bottom. The agent is throttled. In the piston 115 There is insulation layer 117 in it to reduce heat transfer.
  • the refrigerant flows in the reverse direction, the left side of the piston 115 becomes the high pressure side, and the right side becomes the low pressure side, which is pushed to the right end, and the top end to the cylinder end cap 123 The excess high pressure liquid refrigerant is then stored in the cylinder on the left side of the piston 115.
  • a refrigerant circulation pipe 119 is connected to a lower portion of the can body 124, 120, 121, 122, the refrigerant circulation pipe 119, 120 is connected to the left space of the diaphragm 125, and the refrigerant circulation pipes 121, 122 and the diaphragm 125 The space on the right side is connected, and the orifice tube 116 connects the spaces on both sides of the diaphragm 125.
  • the diaphragm 125 extends or expands to the left, close to the tank body.
  • the inner wall of 124 forms a large space on the right side, in which the high-pressure liquid refrigerant circulates, and the excess portion is stored therein.
  • the refrigerant circulation pipe 119, 120 Connected to the low pressure end, the throttled refrigerant circulates in a narrow space at the bottom of the diaphragm 125. This narrow space should ensure that the refrigerant does not evaporate and vaporize; conversely, the refrigerant flows in the opposite direction and the diaphragm 125 expands to the right. Grille 126 prevents the diaphragm 125 from extending downward to prevent clogging of the refrigerant circulation tube nozzle.
  • the shared reservoir 129 in Figure 29 is located in the bi-directional expansion restrictor 97 Above, when the right side is the high pressure end and the left side is the low pressure end, the right side solenoid valve 130 is opened, the left side solenoid valve is closed, and the accumulator 129 stores the right side high pressure liquid refrigerant, and vice versa, the left side solenoid valve 130 Open, the solenoid valve on the right side is closed, and the reservoir 129 stores the high pressure liquid refrigerant on the left side.
  • the air supply box, the exhaust fan box, the heat pump system main unit, and the water cooler can be placed indoors or outside; the air supply box can be brought back to the air outlet or without the return air outlet; the exhaust air box can be carried
  • the new air outlet can also be equipped with no fresh air outlets;
  • the multi-unit unit can carry multiple indoor units and outdoor units;
  • the water cooler can be connected in series or in parallel on the high-pressure air pipe or across the refrigerant circulation pipe, and it can also be converted into
  • the water heater provides a heat source for the heat pump system for defrost operation. It can also be used as a liquid reservoir to store excess liquid refrigerant.
  • the expansion throttle can use a two-way valve or a check valve. The two-way valve makes the heat pump system more simplify.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Air Conditioning Control Device (AREA)
  • Central Air Conditioning (AREA)

Abstract

La présente invention a trait à un climatiseur pour récupération de chaleur à partir d'une pompe à chaleur, lequel climatiseur comprend une boîte d'alimentation en air (1), des boîtes d'évacuation d'air (2, 59), un système de pompe à chaleur et un système de commande de distribution d'énergie. La boîte d'alimentation en air (1) traite l'air extérieur frais et le pompe vers l'intérieur, les boîtes d'évacuation d'air (2, 59) évacuent l'air intérieur poussiéreux vers l'extérieur, un évaporateur (8) du système de pompe à chaleur est disposé dans la boîte d'alimentation en air (1) afin de refroidir l'air au cours du refroidissement et de passer sur un condensateur afin de chauffer l'air au cours du chauffage; un condensateur (16) du système de pompe à chaleur est disposé dans les boîtes d'évacuation d'air (2, 59) afin d'absorber l'énergie froide provenant à la fois de l'air intérieur et de l'air extérieur au cours du refroidissement et afin de passer sur l'évaporateur afin d'absorber la chaleur provenant à la fois de l'air intérieur et de l'air extérieur au cours du chauffage, de sorte que le froid et la chaleur dans l'air intérieur évacué sont récupérés et réutilisés, ce qui permet d'économiser de l'énergie.
PCT/CN2012/074960 2011-05-06 2012-05-01 Climatiseur pour récupération de chaleur à partir d'une pompe à chaleur Ceased WO2012152199A1 (fr)

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CN201120141549.4 2011-05-06

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