CN107289563A - Reheating type heat pump recuperation of heat air-conditioner set - Google Patents

Abstract

The invention discloses a reheating type heat pump heat recovery air conditioner unit, which comprises an air supply box, an exhaust box, and a heat pump system. The evaporator and reheater of the heat pump system are installed in the air supply box. When cooling, they are used to cool, dehumidify and reheat the outdoor fresh air and indoor return air. When heating, the evaporator is converted into a condenser. For heating air, the condenser of the heat pump system is installed in the exhaust box. When cooling, it discharges heat to the indoor exhaust air and outdoor fresh air. When heating, it is converted into an evaporator to absorb the heat in the indoor exhaust air and outdoor fresh air. , because the condenser and the reheater are connected in series in the heat pump system, the number of control valves on the heat pump system is reduced, the system is simple in structure and reliable in operation, the cold heat of the indoor exhaust air and the condensation heat of the heat pump system are recycled, and the energy saving effect is remarkable , The air-conditioning unit has cold and heat sources, and does not need refrigeration stations and boiler rooms to provide air-conditioned hot and cold water. It can replace air-conditioning units with surface coolers, and the air-conditioning system is simplified.

Description

Reheat type heat pump heat recovery air conditioning unit

technical field

The invention belongs to the field of heating, ventilating and air-conditioning, and in particular relates to an air-conditioning unit which adopts a heat pump to recover heat energy.

Background technique

At present, the heat recovery of air-conditioning exhaust air usually adopts the rotary wheel type and the plate-fin type, which has low heat exchange efficiency, and there is penetration and contact between the exhaust air and the fresh air, which pollutes the fresh air and is unhygienic. In addition, this type of air conditioning unit does not have For cold and heat sources, heat exchange equipment should be added, and cold and heat sources should be provided from the outside.

Patent No. ZL201210055160.7 invention patent "heat pump heat recovery air conditioning unit" proposes "reheating heat pump heat recovery air conditioning unit", its reheater and condenser are connected in parallel in the heat pump system pipeline, each with electric The regulating valve distributes the refrigerant flow, but the electric regulating valve is a valve with slits, the refrigerant is easy to leak, and the electric valve has movable parts, which are easy to be damaged. Therefore, the inventive system is complex, has poor reliability and is prone to failure.

Contents of the invention

The object of the present invention is to provide a reheating heat pump heat recovery air conditioning unit with reasonable structure, simple system and reliable operation without or less use of regulating valves.

The solution of the present invention is: the reheating type heat pump heat recovery air conditioning unit includes an air supply box, an exhaust box, and a heat pump system. The air supply box includes a fresh air outlet, a return air outlet, an air supply outlet, a blower, an evaporator, and a reheater. The exhaust box includes an air inlet, a fresh air outlet, an exhaust outlet, a condenser, and an exhaust fan. The heat pump system includes a compressor, a condenser, a reheater, an evaporator, an expansion restrictor, a four-way reversing valve, and auxiliary devices.

When the equipment is running, the outdoor fresh air and return air are sucked into the air supply box by the blower fan, cooled and dehumidified (summer) or heated (winter) by the evaporator of the heat pump system, and then reheated by the reheater (summer), and the air is treated To the set parameters, it is sent to each air-conditioning area through the air supply system. The indoor exhaust air and outdoor fresh air are sucked into the exhaust box by the exhaust fan, and are discharged outside after being heated (in summer) or cooled (in winter) by the condenser of the heat pump system.

When the heat pump system works in summer, because the indoor air temperature is lower than the outdoor temperature, indoor exhaust air and outdoor fresh air are used to cool the condenser of the heat pump system in the exhaust box, and the cooling capacity is absorbed by the condenser. In the air supply box, the outdoor fresh air and indoor return air are cooled and dehumidified by the evaporator of the heat pump system, and then reheated by the reheater before being sent to the air-conditioned room. In this way, through the refrigeration cycle of the heat pump system, the cold energy in the indoor exhaust air and the condensation heat of the heat pump system are recycled.

When the heat pump system works in winter, the condenser and reheater of the heat pump system are converted into evaporators. Because the indoor air temperature is higher than the outdoor temperature, the indoor exhaust air and outdoor fresh air are used to heat the condenser in the exhaust box, and the heat is absorbed by the condenser. . In the air supply box, the evaporator of the heat pump system is converted into a condenser. The outdoor fresh air and indoor return air are heated by the evaporator and then sent to the air-conditioned room. At this time, the reheater does not work. In this way, through the heating cycle of the heat pump system, the heat in the indoor exhaust air and the condensation heat of the heat pump system are recycled.

The condenser and the reheater are connected in series on the pipeline of the heat pump system. When the heat pump system refrigerates, the two are condensers, in which the high-temperature and high-pressure refrigerant releases heat to the air. In the exhaust box, the condenser releases heat to the outdoor fresh air and indoor exhaust air. In the air supply box, The reheater heats the indoor return air and outdoor fresh air after cooling and dehumidification, raising the dew point temperature to the supply air temperature, and the condensation heat is recycled. When the heat pump system is in the heating cycle, the two are converted into evaporators, where the low-temperature and low-pressure refrigerant absorbs heat from the air, and in the exhaust box, the condenser absorbs heat from outdoor fresh air and indoor exhaust air, and in the air supply box When the reheater is not working, and the indoor return air and outdoor fresh air are not processed, windshield devices can be installed on both sides of the reheater, and a bypass air duct can be installed so that the air does not pass through the reheater, but flows from the bypass air duct. Pass through, or set up a reheater bypass pipe to ensure that the low-temperature and low-pressure refrigerant flows away from the bypass pipe without passing through the reheater, so that when the air passes through the reheater, there will be no temperature change. Through the above method, the heat energy of the indoor exhaust air and the condensation heat of the refrigerant can be recovered and utilized, and the purpose of energy saving is realized.

Description of drawings

Figure 1 is the structural diagram of the integral reheating heat pump heat recovery air conditioning unit (1)

Figure 2 is the structural diagram of the integral reheating heat pump heat recovery air conditioning unit (2)

Figure 3 is a heat pump system diagram (1)

Figure 4 is a heat pump system diagram (2)

Figure 5 is a heat pump system diagram (3)

Figure 6 is a diagram of a heat pump system with a bypass pipe and a check valve (4)

Figure 7 is a diagram of a heat pump system with a bypass pipe and a check valve (5)

Figure 8 is a diagram of a heat pump system with a bypass pipe and a check valve (6)

Figure 9 is a structural diagram of a split-type reheating heat pump heat recovery air conditioning unit

Figure 10 is a diagram of a two-pipe multi-connected heat pump system (1)

Figure 11 is a diagram of a two-pipe multi-connected heat pump system (2)

Figure 12 is a three-pipe multi-connected heat pump system diagram (3)

Figure 13 is a diagram of a four-pipe multi-connected heat pump system (4)

Figure 14 is a structural diagram of a three-pipe multi-connected heat pump heat recovery air conditioning unit

Explanation of reference signs:

1. Air supply box, 2. Exhaust air box, 3. 17. Fresh air outlet, 4. Return air outlet, 5. Filter, 6. Blower fan, 7. Partition, 8. Evaporator, 9. Refrigerant circulation pipe, 10. Damper valve, 11. Reheater, 12. Bypass ventilation valve, 13. Humidifier, 14. Water baffle, 15. Air supply port, 16. Air inlet port, 18. Condenser, 19. Compressor, 20 , exhaust fan, 21, air outlet, 22, windshield, 23, windshield roller shutter, 24, 25, four-way reversing valve, 26, liquid reservoir, 27, 35, 39, 40, dry filter , 28, sight glass, 29, 38, expansion restrictor, 30, gas-liquid separator, 31, 46, bypass pipe, 32, 33, 44, 45, one-way valve, 34, 42, electric control valve , 36, the first circulation main pipe, 37, the second circulation main pipe, 41, the heating circulation main pipe, 43, the reheater outlet main pipe, 47, the third circulation main pipe.

Specific implementation methods

Fig. 1 is a construction diagram of an integral heat pump heat recovery air conditioning unit, which includes an air supply box 1, an exhaust box 2, a heat pump system, and a power distribution control system. The box body is made of steel plate and other materials, and is insulated with polyurethane and other thermal insulation materials. There is an inspection door on the box body, which is convenient for personnel to enter the box for inspection and maintenance. The air supply box 1 and the exhaust box 2 are disconnected by a partition 7, and thermal insulation materials are pasted to prevent wind and heat exchange between the fresh air and the exhaust air. The air supply box 1 and the exhaust box 2 can be made integral, and the required equipment is installed in a complete box. The integral air conditioning unit is not convenient for transportation, installation and maintenance, but saves materials; it can also be made Segmented combined type, the equipment with different functions is placed in several functional segments, made into several small boxes, and assembled into a whole after arriving at the site. For example: in the air supply box 1, the fresh air outlet 3, the return air outlet 4, and the filter 5 are made into an air inlet mixed filter section, and so on, can be made into a blower section, an evaporator section, and a humidification air supply section. The air exhaust box 2 can be made into an air inlet mixing filter section, a condenser section, a heat pump host and an electric control box section, and an exhaust fan section. Each section can be disassembled and assembled, which is convenient for transportation, installation and maintenance. Air supply box 1 and air exhaust box 2 can be added with other functional sections as required, such as additional electric heating section, air disinfection section, noise reduction section, maintenance section, etc. The wind-shielding device of the reheater 11 is the wind-shielding valve 10, which is installed on both sides of the reheater 11. After the wind-shielding valve 10 is closed, the reheater 11 is kept insulated and sealed to prevent heat exchange with the air.

The host part of the heat pump system (compressor 19 and other equipment) can be placed in the box or outside the box, and the evaporator 8, reheater 11, condenser 18, refrigerant circulation pipe 9 and other equipment are located in the box. The evaporator 8, the reheater 11, and the condenser 18 adopt heat exchangers in the form of direct expansion coils to ensure that the refrigerant evaporates and condenses therein, and the heat exchangers are made of copper tubes and aluminum fins. The expansion restrictor 29 usually adopts an electronic expansion valve, which is suitable for variable capacity regulation of the heat pump system. The heat pump system has auxiliary devices such as a liquid reservoir 26 , a dry filter 27 , a sight glass 28 , and a gas-liquid separator 30 .

The electric control box of the power distribution control system is equipped with controllers, displays, power distribution equipment, etc., which can be hung outside the box, embedded in the box, or set separately from the box. Various power distribution and control equipment and pipelines distributed in the box. Various pipelines passing through the partition 7 should be sealed to prevent air leakage.

When the equipment is working in summer, in the air supply box 1, the outdoor high-temperature and high-humidity fresh air and the indoor return air enter the box from the fresh air port 3 and the return air port 4 under the action of the blower 6, and are filtered by the filter 5 after being mixed. The blower 6 is cooled and dehumidified to the dew point temperature through the evaporator 8, and then reheated by the reheater 11 to reach the set temperature and humidity, and sent to the air-conditioning area from the air supply port 12. At this time, the damper 10 is fully open, the bypass ventilation valve 12 is closed, all the air passes through the reheater 11, the bypass ventilation valve 12 is connected with the reheater 11, and is located at the same position in the air supply box 1; in the exhaust box 2, the outdoor fresh air and the indoor exhaust air Under the action of the exhaust fan 20, the wind enters the box from the air inlet 16 and the fresh air outlet 17, and after being mixed, it is filtered by the filter 5 for dust removal, passes through the condenser 18, is heated up, and then passes through the exhaust fan 20 and the exhaust outlet 21. to the outside. At this time, the heat pump system performs a refrigeration cycle. In the air supply box 1, the evaporator 8 evaporates and absorbs heat, and the supply air is cooled and dehumidified, and then reheated by the reheater 11. After the exhaust air is mixed, the condensation temperature is lowered, the condenser 18 is cooled by the indoor and outdoor air, and the cooling capacity in the indoor exhaust air and the condensation heat of the heat pump system are recycled.

When the equipment is working in winter, the heat pump system performs a heating cycle, and the system performs a working condition conversion. The evaporator 8 is converted into a condenser to condense and release heat, and the reheater 11 and condenser 18 are converted into an evaporator to evaporate and absorb heat. In the air supply box 1, the outdoor low-temperature fresh air and the indoor return air enter the box from the fresh air outlet 3 and the return air outlet 4 under the action of the blower 6, are mixed and filtered by the filter 5 for dust removal, pass through the blower 6, and pass through the evaporator 8 , be heated up, at this moment, air does not need to reheat, and reheater 11 does not work, and damper valve 10 is closed, and bypass ventilation valve 12 is fully opened, and all air passes through bypass ventilation valve 12. There is thermal insulation material on the windshield valve 10 blades, after closing, form airtight thermal insulation space around reheater 11, avoid hot air and reheater 11 heat exchange. If the air humidity is low, humidifier 13 is also needed to humidify. After reaching the set temperature and humidity, it is sent to the air-conditioning area from the air supply port 15 through the water baffle 14; Under the action of 20, the indoor exhaust air enters the box from the air inlet 16, and the outdoor fresh air enters the box from the fresh air outlet 17. After mixing, it is filtered by the filter 5 for dust removal, passes through the condenser 18, is cooled down, and then passes through the exhaust fan 20 and the air outlet 21 Exhausted to the outside, after the outdoor low-temperature fresh air is mixed with the indoor high-temperature exhaust air, the evaporation temperature is increased, and the heat in the indoor exhaust air is recycled.

When the equipment is working in the transitional season, the heat pump system stops running, the return air outlet 4 in the air supply box 1 is closed, the fresh air outlet 3 and the air supply outlet 15 are opened, and the blower 6 operates; the fresh air outlet 17 in the exhaust box 2 is closed, and the air inlet 16, exhaust air The port 21 is opened, the exhaust fan 20 operates, and the air-conditioning unit performs fresh air operation.

When the equipment is running, the power distribution equipment of the power distribution control system provides power for the heat pump system, the blower 6, the exhaust fan 20, the electric air volume adjustment tuyere, and the automatic control system. The heat pump system is a variable-capacity system, the compressor 19 is a variable-capacity compressor, the blower 6 and the exhaust fan 20 are variable-frequency speed-regulating fans, and the fresh air outlets 3 and 17, the return air outlet 4, and the air inlet 16 are electric air volume adjustment outlets, which can also be used Manual and electric dual-purpose variable air volume adjustment tuyere. The automatic control equipment controls the displacement of the compressor 19 according to the changes of indoor and outdoor air parameters, automatically adjusts the cooling capacity or heating capacity of the heat pump system, controls the speed of the blower 6 and the exhaust fan 20, and the opening of each air outlet, and automatically adjusts the air volume , to ensure the efficient and stable operation of the air conditioning unit. There are controllers, displays, sensors, actuators and other equipment in the automatic control system, which are usually controlled by microcomputers (such as PLC controllers), with functions such as independent setting of parameters, fault detection, automatic alarm, etc. Remote control through computer keyboard and mouse, and network control through LAN, Internet, and mobile phone APP.

In the above equipment, the air supply box 1 is equipped with a return air outlet 4, which can handle indoor return air. This unit is suitable for all-air air-conditioning systems and variable air-volume air-conditioning systems, such as large shopping malls and office buildings. When there is no return air outlet 4, the equipment is a fresh air air conditioning unit, and the air supply is fresh air, which is clean and hygienic, and is suitable for hotels and hospitals with high air hygiene standards.

FIG. 2 is a structural diagram of another integral reheating type heat pump heat recovery air conditioner unit. The difference between it and FIG. The windshield 22 is a detachable thermal insulation board installed on both sides of the reheater 11 . The wind-shielding roller blind 23 is the thermal insulation material that can be folded, and is installed on both sides of the reheater 11, and when needs keep out the wind, put down the roller blind, and roll up when not in use.

Figures 3, 4 and 5 are heat pump system diagrams of the above-mentioned reheating type heat pump heat recovery air conditioning unit. In Fig. 3, the discharge port of compressor 19 is connected with one port of four-way reversing valve 24, and the suction port is connected with the other port of four-way reversing valve 24 through auxiliary device gas-liquid separator 30; The reversing valve 24 is connected, and the other end is connected with the reheater 11; one end of the reheater 11 is connected with the condenser 18, and the other end is connected with the four-way reversing valve 25; one end of the four-way reversing valve 25 is connected with the reheater 11 , the other end is connected with auxiliary devices such as expansion restrictor 29, liquid reservoir 26, dry filter 27, sight glass 28; after throttling by expansion restrictor 29, it is connected with four-way reversing valve 25, The other end of the pass reversing valve 25 is connected with the evaporator 8; one end of the evaporator 8 is connected with the four-way reversing valve 25, and the other end is connected with the four-way reversing valve 24.

Figure 3 is a refrigeration cycle. The reheater 11 and the condenser 18 are connected in series in the heat pump system. At this time, they are both condensers. Part of the condensation heat is discharged to the outdoor fresh air and indoor exhaust air through the condenser 18, and the other part is condensed. The heat is discharged to the outdoor fresh air and indoor return air through the reheater 11 to reheat the air. The refrigerant cycle process is as follows: compressor 19→four-way reversing valve 24→condenser 18→reheater 11→four-way reversing valve 25→accumulator 26→drying filter 27→sight mirror 28→ Expansion restrictor 29→four-way reversing valve 25→evaporator 8→four-way reversing valve 24→gas-liquid separator 30→compressor 19. How to distribute the heat of condensation of the refrigerant in the condenser 18 and the reheater 11 can be realized by adjusting the wind speed of the fan. When the heat required by the reheater 11 decreases, increase the wind speed of the exhaust fan 20 and increase the opening of the fresh air port 17 If the fresh air volume is increased, the heat dissipation of the refrigerant in the condenser 18 will increase; when the reheater 11 needs more heat, the wind speed of the exhaust fan 20 will be reduced, and the opening of the fresh air port 17 will be reduced to reduce the fresh air. As the air volume increases, the heat dissipation of the refrigerant in the condenser 18 also decreases.

What Fig. 4 carries out is heating cycle, and reheater 11, condenser 18 are transformed into evaporator, both are still connected in series in the heat pump system, and evaporator 8 is transformed into condenser, at this moment, the air in air supply box 1 No need to reheat, reheater 11 does not work, close with windshield, bypass ventilation valve 12 is fully opened, all air passes through bypass ventilation valve 12, and condenser 18 absorbs heat from outdoor fresh air and indoor exhaust air. The refrigerant cycle process is as follows: compressor 19→four-way reversing valve 24→evaporator 8→four-way reversing valve 25→accumulator 26→dry filter 27→sight mirror 28→expansion restrictor 29 → Four-way reversing valve 25 → Reheater 11 → Condenser 18 → Four-way reversing valve 24 → Gas-liquid separator 30 → Compressor 19.

In Fig. 5, the positions of reheater 11 and condenser 18 in the heat pump system have been reversed relative to those in Fig. 3 and 4. During the refrigeration cycle, the high-temperature and high-pressure gaseous refrigerant first enters reheater 11 to dissipate heat, and then enters condenser 18. Heat dissipation; during the heating cycle, the low-temperature and low-pressure liquid refrigerant first enters the condenser 18 to absorb heat, and then enters the reheater 11. At this time, the reheater 11 is closed and does not work, and the heat absorption process of the refrigerant is completely in the condenser 18. completed. Since the high-temperature and high-pressure gaseous refrigerant first enters the reheater 11 to dissipate heat during the refrigeration cycle, it is difficult to distribute the heat of condensation of the refrigerant between the condenser 18 and the reheater 11, and special process design is required to realize it, such as: let the reheater The radiating area of the heater 11 can be adjusted, which can be realized by adjusting the wind-shielding area of the wind-shielding roller blind 23 .

Figures 6, 7, and 8 are heat pump system diagrams of other forms of the above-mentioned reheat heat pump heat recovery air conditioning unit, in which a bypass pipe 31, one-way valves 32, 33, and an electric regulating valve 34 are added. In Fig. 6, the bypass pipe 31 and the reheater 11 are connected in parallel in the heat pump system. The bypass pipe 31 is provided with a check valve 32, and the reheater 11 is provided with a check valve 33. What is carried out in Fig. 6 is a refrigeration cycle. The refrigerant cycle process is as follows: compressor 19→four-way reversing valve 24→condenser 18→reheater 11→one-way valve 33→four-way reversing valve 25→accumulator 26→dry filter 27→ Sight mirror 28→expansion restrictor 29→four-way reversing valve 25→evaporator 8→four-way reversing valve 24→gas-liquid separator 30→compressor 19. At this time, the one-way valve 32 is in the blocked state, the one-way valve 33 is in the open state, and the high-temperature and high-pressure refrigerant enters the reheater 11 to dissipate heat.

Figure 7 shows that the heat pump system in Figure 6 performs a heating cycle, and the refrigerant cycle process is as follows: compressor 19→four-way reversing valve 24→evaporator 8→four-way reversing valve 25→accumulator 26→drying Filter 27→sight mirror 28→expansion restrictor 29→four-way reversing valve 25→one-way valve 32→condenser 18→four-way reversing valve 24→gas-liquid separator 30→compressor 19. At this time, the one-way valve 32 is in an open state, and all the low-temperature and low-pressure liquid refrigerant passes through the bypass pipe 31 and enters the condenser 18 to absorb heat, while the one-way valve 33 is in a blocking state, and the low-temperature and low-pressure liquid refrigerant cannot pass through the reheater 11 , Therefore, the reheater 11 no longer needs a windshield, and the bypass air valve 12 is no longer needed, and the structure of the equipment is simplified.

In Fig. 8, the positions of reheater 11 and condenser 18 in the heat pump system have been reversed relative to Fig. 6 and Fig. 7. During the refrigeration cycle, the high-temperature and high-pressure gaseous refrigerant first enters reheater 11 to dissipate heat, and then enters condenser 18. To dissipate heat, adjust the opening of the electric control valve 34 on the bypass pipe 31 to adjust the flow of refrigerant entering the reheater 11, thereby adjusting the reheat of the reheater 11; during the heating cycle, the low-temperature and low-pressure liquid refrigerant enters first The condenser 18 absorbs heat, the electric control valve 34 is fully opened, the one-way valve 33 is in a blocked state, and the low-temperature and low-pressure liquid refrigerant does not enter the reheater 11. At this time, the reheater 11 does not work, and the heat absorption process of the refrigerant is complete. This is done in the condenser 18, so such a heat pump system also does not require a windshield and a bypass vent valve 12.

Figure 9. The air supply box 1 and the exhaust box 2 are connected separately. When the equipment leaves the factory, the evaporator 8, the reheater 11, the condenser 18, and the refrigerant circulation pipe 9 connected to the main engine of the heat pump system are disconnected and sealed. During on-site installation, the refrigerant circulation pipe 9 is connected through a quick connector. The two boxes can be placed in different positions according to the user's needs, and the layout is more flexible. For example, the exhaust box 2 can be placed on the roof to save floor space and reduce the impact of unit noise.

Figure 10 is a multi-connected heat pump system diagram, which is one or more exhaust boxes 2 connected to two or more air supply boxes 1, the condenser 18 and the reheater 11 are still connected in series, each air supply box The reheaters 11 in the tank 1 are connected in parallel, and each evaporator 8 is equipped with auxiliary devices such as an expansion restrictor 38, a dry filter 39, 40, and the first circulation main pipe 36 is provided with a main pipe expansion throttling Auxiliary devices such as device 29, liquid reservoir 26, dry filter 27, 35, sight glass 28, etc. In the figure, the heat pump system components of the exhaust box 2, the heat pump system components of the air supply box 1, and the heat pump system components between the air supply box 1 are connected by two refrigerant circulation main pipes, which are: the first circulation main pipe 36, the second main circulation pipe Circulation main pipe 37, this unit is called two-pipe multi-connected heat pump heat recovery air conditioning unit. The exhaust port of the compressor 19 is connected to the first port of the four-way reversing valve 24 (compressor exhaust port), and the suction port is connected to the third port of the four-way reversing valve 24 (compressor suction port) through the auxiliary device gas-liquid separator 30 gas port); one end of the condenser 18 is connected to the second port (condenser port) of the four-way reversing valve 24, and the other end is connected to the main line expansion restrictor 29 on the first circulation main pipe 36 and the liquid reservoir 26, dry Filters 27, 35, sight glass 28 and other auxiliary devices are connected; one end of the first circulation main pipe 36 is connected to the other end of the condenser 18, and the other end is connected to one end of two or more reheaters 11; one end of the reheater 11 It is connected to the other end of the first circulation main pipe 36, and the other end is connected to auxiliary devices such as the expansion restrictor 38 and the dry filter 39, 40 of the evaporator 8; one end of the evaporator 8 passes through the built-in expansion restrictor 38 Auxiliary devices such as dry filters 39, 40 are connected to the other end of the reheater 11, and the other end is connected to the second circulation main pipe 37; one end of the second circulation main pipe 37 is connected to the other end of two or more evaporators 8, and the other end One end is connected with the fourth port (evaporator port) of the four-way reversing valve 24 .

What Fig. 10 carries out is refrigeration cycle, and the first port of four-way reversing valve 24 is communicated with the second port, and the third port is communicated with the fourth port, and the refrigerant circulation process is such: compressor 19 → four-way reversing Valve 24→condenser 18→drying filter 35→expansion restrictor 29→sight glass 28→drying filter 27→accumulator 26→reheater 11→drying filter 39→expansion restrictor 38→drying Filter 40→evaporator 8→four-way reversing valve 24→gas-liquid separator 30→compressor 19, at this time, the expansion restrictor 29 of the main pipeline is fully open, and the expansion restrictor 38 of the evaporator 8 is in throttle In the flow state, the high-temperature and high-pressure refrigerant first dissipates heat in the condenser 18, and then heats the air in the reheater 11. When the heat pump system is in the heating cycle, the working condition transition occurs, the first port of the four-way reversing valve 24 communicates with the fourth port, the second port communicates with the third port, and the reheater 11 and condenser 18 are converted into evaporation The evaporator 8 is transformed into a condenser, and the refrigerant circulation process is as follows: compressor 19→four-way reversing valve 24→evaporator 8→drying filter 40→expansion restrictor 38→drying filter 39→re- Heater 11→liquid receiver 26→dry filter 27→sight mirror 28→expansion restrictor 29→dry filter 35→condenser 18→four-way reversing valve 24→gas-liquid separator 30→compressor 19 , at this time, the expansion restrictor 38 is fully open or fine-tuned, the refrigerant entering the reheater 11 is a non-low temperature refrigerant, and the air entering the reheater 11 can be heated, but no cooling treatment is performed, and the main pipeline expands The throttling device 29 is in a throttling state, therefore, the reheater 11 may not be provided with a windshield device, and may not be provided with a bypass ventilation valve 12 .

Figure 11 is also a two-pipe multi-connected heat pump heat recovery air conditioning unit, which is one or more exhaust boxes 2 connected to two or more air supply boxes 1, and the condenser 18 and reheater 11 are still connected in series , the reheaters 11 in each air supply box 1 are connected in parallel, and each evaporator 8 is equipped with expansion restrictors 38, dry filters 39, 40 and other auxiliary devices, and the first circulation main pipe 36 has General pipeline expansion restrictor 29, liquid reservoir 26, dry filter 27, 35, sight glass 28 and other auxiliary devices. In the figure, the heat pump system components of the exhaust box 2, the heat pump system components of the air supply box 1, and the heat pump system components between the air supply box 1 are connected by two refrigerant circulation main pipes, which are: the first circulation main pipe 36, the second main circulation pipe Circulation main pipe 37, this unit is called two-pipe multi-connected heat pump heat recovery air conditioning unit. The difference from FIG. 10 is that each reheater 11 has a one-way valve 33 and is connected in parallel with a bypass pipe 31 with a one-way valve 32 thereon. The exhaust port of the compressor 19 is connected to the first port of the four-way reversing valve 24, and the suction port is connected to the third port of the four-way reversing valve 24 through the auxiliary device gas-liquid separator 30; one end of the condenser 18 is connected to the four-way reversing valve The valve 24 is connected to the second port, and the other end is connected to the main pipeline expansion restrictor 29 on the first circulation main pipe 36 and auxiliary devices such as the liquid reservoir 26, dry filters 27, 35, and sight glass 28; the first circulation main pipe One end of 36 is connected to the other end of condenser 18, and the other end is connected to two or more reheaters 11 and one end of bypass pipe 31; one end of reheater 11 is connected to the other end of first circulation main pipe 36 and bypass pipe One end of evaporator 31 is connected, and the other end is connected with auxiliary devices such as expansion restrictor 38, dry filter 39, 40 and the other end of bypass pipe 31 of evaporator 8; Auxiliary devices such as device 38, dry filter 39, 40 are connected to the other end of reheater 11 and bypass pipe 31, and the other end is connected to one end of second circulation main pipe 37; one end of second circulation main pipe 37 is connected to two or more The other end of the evaporator 8 is connected, and the other end is connected with the fourth port of the four-way reversing valve 24 .

What Fig. 11 carries out is refrigeration cycle, and the first port of four-way reversing valve 24 is communicated with the second port, and the third port is communicated with the fourth port, and the refrigerant circulation process is such: compressor 19 → four-way reversing Valve 24→condenser 18→dry filter 35→expansion restrictor 29→sight glass 28→dry filter 27→accumulator 26→reheater 11→one-way valve 33→dry filter 39→expansion joint flow device 38→drying filter 40→evaporator 8→four-way reversing valve 24→gas-liquid separator 30→compressor 19, at this time the expansion restrictor 29 of the main pipeline is fully open, and the expansion restrictor 38 is throttling state, the one-way valve 32 is in the blocked state, and the one-way valve 33 is in the open state. The high-temperature and high-pressure refrigerant first dissipates heat in the condenser 18, and then heats the air in the reheater 11. When the heat pump system is in the heating cycle, the working condition transition occurs, the first port of the four-way reversing valve 24 communicates with the fourth port, the second port communicates with the third port, and the reheater 11 and condenser 18 are converted into evaporation The evaporator 8 is converted into a condenser, and the refrigerant cycle process is as follows: compressor 19→four-way reversing valve 24→evaporator 8→drying filter 40→expansion restrictor 38→drying filter 39→single Directional valve 32→accumulator 26→dry filter 27→sight mirror 28→expansion restrictor 29→dry filter 35→condenser 18→four-way reversing valve 24→gas-liquid separator 30→compressor 19 At this time, the expansion restrictor 38 is fully open or fine-tuned, the main line expansion restrictor 29 is in the throttling state, the one-way valve 32 is in the open state, the one-way valve 33 is in the blocking state, and the reheater 11 is not cooling. The agent passes, does not work. Therefore, the reheater 11 may not be provided with a windshield device, and the bypass ventilation valve 12 may not be provided.

Figure 12 is another multi-connected heat pump system diagram, the same as Figures 10 and 11, it is one or more air exhaust boxes 2 connected to two or more air supply boxes 1, the condenser 18 and the reheater 11 are still It is connected in series, and the reheaters 11 in each air supply box 1 are connected in parallel. The heat pump system in each air supply box 1 has a bypass pipe 31, and each reheater 11 has a One-way valve 33, reheater 11 and bypass pipe 31 are connected in parallel in the heat pump system, each evaporator 8 is equipped with expansion restrictor 38, dry filter 39, 40 and other auxiliary devices, and heating cycle main pipe 41 is equipped with There are auxiliary devices such as a total pipeline expansion restrictor 29, a liquid reservoir 26, a dry filter 27, and a sight glass 28. In the figure, the heat pump system components of the exhaust box 2, the heat pump system components of the air supply box 1, and the heat pump system components between the air supply box 1 are connected through three refrigerant circulation main pipes, which are: the first circulation main pipe 36, the second circulation main pipe Main pipe 37, heating cycle main pipe 41, this unit is called three-pipe multi-connected reheating type heat pump heat recovery air conditioning unit. The exhaust port of the compressor 19 is connected to the first port of the four-way reversing valve 24, and the suction port is connected to the third port of the four-way reversing valve 24 through the auxiliary device gas-liquid separator 30; one end of the condenser 18 is connected to the four-way reversing valve. It is connected to the second port of the valve 24, and the other end is connected with the first circulation main pipe 36 and one end of the heating circulation main pipe 41; one end of the first circulation main pipe 36 is connected with the other end of the condenser and one end of the heating circulation main pipe 41, and the other One end is connected to one end of two or more reheaters 11; one end of the reheater 11 is connected to the other end of the first circulation main pipe 36, and the other end is connected to one end of the bypass pipe 31 and the evaporator through the built-in check valve 33 8 with expansion restrictor 38, dry filter 39, 40 and other auxiliary devices connected; one end of bypass pipe 31 is connected with the other end of reheater 11, expansion restrictor 38 with evaporator 8, dry filter 39, 40 and other auxiliary devices, and the other end is connected to the other end of the heating cycle main pipe 41; one end of the evaporator 8 is connected to the reheater 11 through its own expansion restrictor 38, dry filter 39, 40 and other auxiliary devices. The other end of the bypass pipe 31 is connected to one end of the bypass pipe 31, and the other end is connected to one end of the second circulation main pipe 37; one end of the second circulation main pipe 37 is connected to the other end of two or more evaporators 8, and the other end is connected to the four-way exchange Connect to the fourth port of the valve 24; one end of the heating circulation main pipe 41 is connected with one end of the first circulation main pipe 36 and the other end of the condenser 18, and the other end is connected with the other end of two or more bypass pipes 31.

What Fig. 12 carries out is refrigeration cycle, and the first port communicates with the second port, and the third port communicates with the fourth port, and the refrigerant circulation process is like this: compressor 19→four-way reversing valve 24→condenser 18→ Reheater 11→one-way valve 33→dry filter 39→expansion restrictor 38→dry filter 40→evaporator 8→four-way reversing valve 24→gas-liquid separator 30→compressor 19, at this time the main pipe The expansion restrictor 29 is closed, the expansion restrictor 38 is in a throttling state, and the one-way valve 33 is in an open state. When the heat pump system is in the heating cycle, the working condition transition occurs, the first port of the four-way reversing valve 24 communicates with the fourth port, the second port communicates with the third port, and the reheater 11 and condenser 18 are converted into evaporation The evaporator 8 is transformed into a condenser, and the refrigerant circulation process is as follows: compressor 19→four-way reversing valve 24→evaporator 8→drying filter 40→expansion restrictor 38→drying filter 39→bypass Through pipe 31→liquid receiver 26→dry filter 27→sight mirror 28→expansion restrictor 29→condenser 18→four-way reversing valve 24→gas-liquid separator 30→compressor 19, one-way at this time The valve 33 is in the blocking state, the reheater 11 is not working, the expansion restrictor 29 of the main pipeline is in the throttling state, and the expansion restrictor 38 is in the fully open or fine-tuning state.

Figure 13 is another multi-connected heat pump system diagram, which is one or more exhaust boxes 2 connected to two or more air supply boxes 1, in the figure, the condenser 18 and the reheater 11 are still connected in series, The reheaters 11 in each air supply box 1 are connected in parallel, and the refrigerant inlet of each reheater 11 is equipped with an electric regulating valve 42 for distributing the flow of refrigerant, and the heat pump system has a reheater The reheater outlet main pipe 43, a bypass pipe 46, the reheater outlet main pipe 43 has a one-way valve 44, the bypass pipe 46 has a one-way valve 45, and each evaporator 8 has an expansion restrictor 38. Auxiliary devices such as dry filter 40, the third circulation main pipe 47 has auxiliary devices such as main line expansion restrictor 29 and liquid reservoir 26, dry filter 27, sight glass 28. In the figure, the heat pump system components of the exhaust box 2, the heat pump system components of the air supply box 1, and the heat pump system components between the air supply box 1 are connected by four refrigerant circulation main pipes, which are: the first circulation main pipe 36, the second main circulation pipe Circulation main pipe 37, third circulation main pipe 47, and reheater outlet main pipe 43, this unit is called four-pipe multi-connected reheating type heat pump heat recovery air conditioning unit. The exhaust port of the compressor 19 is connected to the first port of the four-way reversing valve 24, and the suction port is connected to the third port of the four-way reversing valve 24 through the auxiliary device gas-liquid separator 30; one end of the condenser 18 is connected to the four-way reversing valve The second port of the valve 24 is connected, and the other end is connected with the bypass pipe 46 and one end of the first circulating main pipe 36; one end of the first circulating main pipe 36 is connected with the other end of the condenser 18 and one end of the bypass pipe 46, and the other end is connected with the other end of the bypass pipe 46. One end of two or more reheaters 11 is connected; one end of the reheater 11 is connected to the other end of the first circulation main pipe 36 through its own electric control valve 42, and the other end is connected to one end of the reheater outlet main pipe 43, And in parallel with the bypass pipe 46 in the heat pump system; one end of the reheater outlet main pipe 43 is connected to the other end of two or more reheaters 11, and the other end is connected to the other end of the bypass pipe 46 and the third circulation main pipe 47 One end of the bypass pipe 46 is connected with one end of the first circulation main pipe 36 and the other end of the condenser 18, and the other end is connected with the other end of the reheater outlet main pipe 43 and one end of the third circulation main pipe 47; One end of the three-cycle main pipe 47 is connected to the other end of the reheater outlet main pipe 43 and the bypass pipe 46, and the other end is connected to auxiliary devices such as expansion restrictors 38 and dry filters 39 of two or more evaporators 8; One end of two or more evaporators 8 is connected to the other end of the third circulation main pipe 47 through auxiliary devices such as expansion restrictor 38 and dry filter 39, and the other end is connected to one end of the second circulation main pipe 37; One end of the circulation main pipe 37 is connected to the other end of two or more evaporators 8 , and the other end is connected to the fourth port of the four-way reversing valve 24 .

What Fig. 13 carries out is refrigeration cycle, and the first port communicates with the second port, and the third port communicates with the fourth port, and the refrigerant circulation process is like this: compressor 19→four-way reversing valve 24→condenser 18→ Electric regulating valve 42→reheater 11→one-way valve 44→accumulator 26→dry filter 27→sight mirror 28→expansion restrictor 29→expansion restrictor 38→dry filter 40→evaporator 8 →Four-way reversing valve 24→Gas-liquid separator 30→Compressor 19, at this time, the one-way valve of the outlet main pipe 43 of the reheater is in an open state, and the one-way valve 45 on the bypass pipe 46 is in a blocked state, and the main pipe The road expansion restrictor 29 is in the fully open or fine-tuning state, and the expansion restrictor 38 that comes with the evaporator is in the throttling state. When the heat pump system is in the heating cycle, the working condition is converted, the first port is connected to the fourth port, the second port is connected to the third port, the reheater 11 and the condenser 18 are converted into evaporators, and the evaporator 8 is converted into Condenser, refrigerant circulation process is as follows: compressor 19→four-way reversing valve 24→evaporator 8→dry filter 40→expansion restrictor 38→expansion restrictor 29→sight mirror 28→dry filter device 27→liquid receiver 26→one-way valve 45→condenser 18→four-way reversing valve 24→gas-liquid separator 30→compressor 19, at this time the one-way valve 44 of the reheater outlet main pipe 43 is blocked state, the one-way valve 45 on the bypass pipe 46 is in the open state, the expansion restrictor 29 of the main pipeline is in the throttling state, the expansion restrictor 38 of the evaporator 8 is in the fully open or fine-tuning state, and the reheater 11 The electric control valve 42 is closed, and the reheater 11 does not work.

Figure 14 is a structural diagram of a multi-connected reheating heat pump heat recovery air conditioning unit. One exhaust box 2 is connected to two or more air supply boxes 1. The bellows 1 are also connected in a split type, and the heat pump system in the figure adopts the three-pipe heat pump system in FIG. 12 .

In summary, the condenser 18 and the reheater 11 of the present invention adopt the scheme of series connection, the number of control valves on the heat pump system is reduced, the system structure is simple, and the operation is reliable, and the cold heat of the indoor exhaust air and the condensation heat of the heat pump system are obtained. Recycling, energy-saving effect is remarkable, this air-conditioning unit has cold and heat source, does not need refrigeration station, boiler room to provide air-conditioning cold and hot water, it can replace the air-conditioning unit with surface cooler, and the air-conditioning system is simplified.

The above descriptions are only preferred implementation methods of the present invention, and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above implementation methods according to the technical essence of the present invention belong to the protection scope of the present invention.

Claims (7)

1. reheating type heat pump recuperation of heat air-conditioner set, the unit includes wind pushing box, air exhaust box, heat pump, wind pushing box includes new Air port, return air inlet, air outlet, evaporator, reheater, abat-vent, bypass air-valve, pressure fan, additional function section, air draft case and bag Air inlet, fresh wind port, exhaust outlet, condenser, exhaust blower, additional function section are included, heat pump includes compressor, condenser, steaming Send out device, reheater, expansion throttling device, servicing unit, refrigerant circulation pipe, it is characterised in that fresh wind port connects outdoor air, return air Mouth connects indoor return air, and air outlet connects indoor air-conditioning system air supply duct, and air inlet connects indoor exhaust wind, and exhaust outlet connects outdoor air； Outdoor fresh air and indoor return air by pressure fan suction draft case, by evaporator, reheater, additional function section processing, reach After the air-conditioning parameter of setting, air conditioning area is sent to by air outlet；Outdoor fresh air and indoor exhaust wind suck air exhaust box by exhaust blower, After condenser, the processing of additional function section, outdoor is discharged to by exhaust outlet；Wind pushing box and air exhaust box are monoblock type or split Formula is connected, and is closed cut-off between wind pushing box and air exhaust box；Pressure fan, exhaust blower are adjustable speed fans；Fresh wind port, return air inlet, Air inlet is variable air rate regulating tuyere；Evaporator, the reheater of heat pump are mounted in wind pushing box, and during refrigeration, evaporator is to room Outer fresh air, indoor return air cool-down dehumidification, reheater is condenser, using condensation heat to the outdoor fresh air after cool-down dehumidification, interior Reheating, when heating, evaporator is converted into condenser, and for heating air, reheater is converted to evaporator stops operation；Heat The condenser of pumping system is mounted in air exhaust box, and during refrigeration, condensation heat is taken away by indoor exhaust wind and outdoor fresh air, when heating, conversion Into evaporator, the heat in indoor exhaust wind and outdoor fresh air is absorbed；Condenser is connected in heat pump with reheater, in reheating The both sides of device are equipped with abat-vent, and bypass air-valve is connected with reheater, and positioned at same position, heat pump system in wind pushing box When cold, abat-vent is opened, and bypass air-valve is closed, and the air that is processed is by reheater reheating, and when heat pump is heated, keep out the wind dress Closing is put, bypass air-valve is opened, and the air that is processed is by bypassing air-valve.

2. reheating type heat pump recuperation of heat air-conditioner set, the unit includes wind pushing box, air exhaust box, heat pump, wind pushing box includes new Air port, return air inlet, air outlet, evaporator, reheater, pressure fan, additional function section, air exhaust box include air inlet, fresh wind port, row Air port, condenser, exhaust blower, additional function section, heat pump include compressor, condenser, evaporator, reheater, expansion joint Flow device, check valve, bypass pipe, servicing unit, refrigerant circulation pipe, it is characterised in that fresh wind port connects outdoor air, and return air inlet connects Indoor return air, air outlet connects indoor air-conditioning system air supply duct, and air inlet connects indoor exhaust wind, and exhaust outlet connects outdoor air；It is outdoor Fresh air and indoor return air by pressure fan suction draft case, by evaporator, reheater, additional function section processing, reach setting Air-conditioning parameter after, air conditioning area is sent to by air outlet；Outdoor fresh air and indoor exhaust wind suck air exhaust box by exhaust blower, pass through After condenser, the processing of additional function section, outdoor is discharged to by exhaust outlet；Wind pushing box and air exhaust box are monoblock type or split type company Connect, be closed cut-off between wind pushing box and air exhaust box；Pressure fan, exhaust blower are adjustable speed fans；Fresh wind port, return air inlet, air intake Mouth is variable air rate regulating tuyere；Evaporator, the reheater of heat pump are mounted in wind pushing box, and during refrigeration, evaporator is new to outdoor Wind, indoor return air cool-down dehumidification, reheater is condenser, using condensation heat to the outdoor fresh air after cool-down dehumidification, indoor return air Reheating, when heating, evaporator is converted into condenser, and for heating air, reheater is stopped；The condenser dress of heat pump In air exhaust box, during refrigeration, condensation heat is taken away by indoor exhaust wind and outdoor fresh air, when heating, and is converted into evaporator, absorption chamber Heat in air draft and outdoor fresh air；Condenser is connected in heat pump with reheater, and reheater is connected in parallel on heat with bypass pipe In pumping system；Reheater carries check valve, and when heat pump freezes, check valve is opening state, when heat pump is heated, unidirectionally Valve is blocking state；Bypass pipe carries check valve or electric control valve, and when heat pump freezes, check valve is blocking state, or Electric control valve, which is in, to be blocked or adjustment state, when heat pump is heated, and check valve or electric control valve are opening state.

3. reheating type heat pump recuperation of heat air-conditioner set, the unit includes wind pushing box, air exhaust box, heat pump, wind pushing box is two And more than, air exhaust box be one and more than, wind pushing box include fresh wind port, return air inlet, air outlet, evaporator, reheater, air-supply Machine, additional function section, air exhaust box include air inlet, fresh wind port, exhaust outlet, condenser, exhaust blower, additional function section, heat pump system System includes compressor, condenser, evaporator, reheater, expansion throttling device, servicing unit, refrigerant circulation pipe, and its feature exists In fresh wind port connects outdoor air, and return air inlet connects indoor return air, and air outlet connects indoor air-conditioning system air supply duct, and air inlet connects room Interior air draft, exhaust outlet connects outdoor air；Outdoor fresh air and indoor return air are by pressure fan suction draft case, by evaporator, reheating After the processing of device, additional function section, the air-conditioning parameter for reaching setting, air conditioning area is sent to by air outlet；Outdoor fresh air and room Interior air draft sucks air exhaust box by exhaust blower, and after condenser, the processing of additional function section, outdoor is discharged to by exhaust outlet；One Platform and above air exhaust box connect two and above wind pushing box, are split type between wind pushing box and air exhaust box, wind pushing box and wind pushing box The heat pump part in heat pump part and wind pushing box in connection, air exhaust box, the heat pump part between wind pushing box Connected by first circulation house steward, second circulation house steward；Pressure fan, exhaust blower are adjustable speed fans；Fresh wind port, return air inlet, air intake Mouth is variable air rate regulating tuyere；Evaporator, the reheater of heat pump are mounted in wind pushing box, and during refrigeration, evaporator is new to outdoor Wind, indoor return air cool-down dehumidification, reheater is condenser, using condensation heat to the outdoor fresh air after cool-down dehumidification, indoor return air Reheating, when heating, evaporator is converted into condenser, for heating air；The condenser of heat pump is mounted in air exhaust box, refrigeration When, condensation heat is taken away by indoor exhaust wind and outdoor fresh air, when heating, and is converted into evaporator, absorbs indoor exhaust wind and outdoor fresh air In heat；Condenser and reheater are connected in heat pump, and two and above reheater are connected in parallel in heat pump, every Evaporator, which is carried, carries main pipe rail expansion throttling device, servicing unit on expansion throttling device, servicing unit, first circulation house steward；Pressure Contracting machine exhaust outlet is connected with four-way reversing valve first port, and air entry is connected by servicing unit and the port of four-way reversing valve the 3rd Connect；One end of condenser is connected with four-way reversing valve second port, the other end and the main pipe rail expansion joint on first circulation house steward Flow device, servicing unit connection；The other end of one end of first circulation house steward and condenser is connected, and the other end and two and the above are again One end connection of hot device；One end of reheater and the connection of the other end of first circulation house steward, what the other end was carried with evaporator Expansion throttling device, servicing unit connection；One end of evaporator is another by the expansion throttling device, servicing unit and the reheater that carry One end is connected, and the other end is connected with one end of second circulation house steward；One end of second circulation house steward and two and above evaporator Other end connection, the other end is connected with the port of four-way reversing valve the 4th；When heat pump freezes, main pipe rail expansion throttling device Standard-sized sheet, the expansion throttling device that evaporator is carried is in throttle；When heat pump is heated, main pipe rail expansion throttling device is in Throttle, the expansion throttling device that evaporator is carried is in standard-sized sheet or fine setting state.

4. reheating type heat pump recuperation of heat air-conditioner set, the unit includes wind pushing box, air exhaust box, heat pump, wind pushing box is two And more than, air exhaust box be one and more than, wind pushing box include fresh wind port, return air inlet, air outlet, evaporator, reheater, air-supply Machine, additional function section, air exhaust box include air inlet, fresh wind port, exhaust outlet, condenser, exhaust blower, additional function section, heat pump system System includes compressor, condenser, evaporator, reheater, expansion throttling device, check valve, bypass pipe, servicing unit, refrigerant and followed Endless tube, it is characterised in that fresh wind port connects outdoor air, return air inlet connects indoor return air, and air outlet connects indoor air-conditioning system ajutage Road, air inlet connects indoor exhaust wind, and exhaust outlet connects outdoor air；Outdoor fresh air and indoor return air are by pressure fan suction draft case, warp After pervaporation device, reheater, the processing of additional function section, the air-conditioning parameter for reaching setting, air conditioning area is sent to by air outlet； Outdoor fresh air and indoor exhaust wind suck air exhaust box by exhaust blower, after condenser, the processing of additional function section, pass through exhaust outlet It is discharged to outdoor；One and above air exhaust box connect two and above wind pushing box, wind pushing box and air exhaust box, wind pushing box and wind pushing box it Between be split type connection；Pressure fan, exhaust blower are adjustable speed fans；Fresh wind port, return air inlet, air inlet are variable air rate regulating tuyere； The evaporator of heat pump, reheater are mounted in wind pushing box, during refrigeration, evaporator to outdoor fresh air, indoor return air cool-down dehumidification, Reheater is condenser, using condensation heat to the outdoor fresh air after cool-down dehumidification, indoor return air reheating, when heating, and evaporator turns Condenser is changed into, for heating air；The condenser of heat pump is mounted in air exhaust box, and during refrigeration, condensation heat is by indoor exhaust wind Taken away with outdoor fresh air, when heating, be converted into evaporator, absorb the heat in indoor exhaust wind and outdoor fresh air；Condenser with again Hot device is connected in heat pump, and two and above reheater are connected in parallel in heat pump, and reheater is connected in parallel on heat with bypass pipe In pumping system, every evaporator carries expansion throttling device, servicing unit.

5. reheating type heat pump recuperation of heat air-conditioner set according to claim 4, it is characterised in that the heat pump system in air exhaust box System part and heat pump part in wind pushing box, the heat pump part between wind pushing box pass through first circulation house steward, second Circulate house steward's connection；Main pipe rail expansion throttling device, servicing unit are carried on first circulation house steward, every reheater is with unidirectional Valve, and a bypass pipe is parallel with, check valve is carried on bypass pipe；Exhaust outlet of compressor and four-way reversing valve first port Connection, air entry is connected by servicing unit with the port of four-way reversing valve the 3rd；One end of condenser and four-way reversing valve second Port is connected, and the other end is connected with main pipe rail expansion throttling device, the servicing unit on first circulation house steward；First circulation house steward's The other end connection of one end and condenser, the other end is connected with two and above reheater, one end of bypass pipe；The one of reheater End is connected with the other end of first circulation house steward and one end of bypass pipe, expansion throttling device that the other end is carried with evaporator, auxiliary The other end of device and bypass pipe is helped to connect；One end of evaporator by the expansion throttling device, servicing unit and the reheater that carry, The other end connection of bypass pipe, the other end is connected with one end of second circulation house steward；One end of second circulation house steward with two and The other end connection of above evaporator, the other end is connected with the port of four-way reversing valve the 4th；When heat pump freezes, main pipe rail Expansion throttling device standard-sized sheet, the check valve that the expansion throttling device that evaporator is carried is on throttle, bypass pipe is blocking state, The check valve of reheater is opening state；When heat pump is heated, main pipe rail expansion throttling device is in throttle, evaporator The check valve that the expansion throttling device carried is on standard-sized sheet or fine setting state, bypass pipe is opening state, the check valve of reheater For blocking state.

6. reheating type heat pump recuperation of heat air-conditioner set according to claim 4, it is characterised in that the heat pump system in air exhaust box System part and heat pump part in wind pushing box, the heat pump part between wind pushing box pass through three refrigerant circulation house stewards Connection, they are：First circulation house steward, second circulation house steward, heat circulation house steward；Heat swollen with main pipe rail on circulation house steward Swollen flow controller, servicing unit, every reheater carry check valve, every reheater bypass pipe in parallel；Exhaust outlet of compressor It is connected with four-way reversing valve first port, air entry is connected by servicing unit with the port of four-way reversing valve the 3rd；Condenser One end is connected with four-way reversing valve second port, and the other end and first circulation house steward, the one end for heating circulation house steward are connected；First Circulate one end of house steward and the other end of condenser, heat one end connection of circulation house steward, the other end and two and above reheating One end connection of device, one end of reheater is connected with the other end of first circulation house steward, the other end by the check valve that carries and Expansion throttling device that one end of bypass pipe, evaporator are carried, servicing unit connection；One end of bypass pipe and reheater it is another Hold, the expansion throttling device that evaporator is carried, servicing unit are connected, the other end is connected with heating the other end of circulation house steward；Evaporation Device one end is connected by the other end of the expansion throttling device, servicing unit and the reheater that carry, one end of bypass pipe, the other end with One end connection of second circulation house steward；One end of second circulation house steward is connected with the other end of two and above evaporator, another End is connected with the port of four-way reversing valve the 4th；Heat one end and the first circulation house steward of circulation house steward one end and condenser it is another One end is connected, and the other end is connected with the other end of two and above bypass pipe；When heat pump freezes, check valve is to open shape State, main pipe rail expansion throttling device is closed, and the expansion throttling device that evaporator is carried is in throttle, when heat pump is heated, single It is blocking state to valve, reheater does not work, main pipe rail expansion throttling device is in throttle, the expansion throttling that evaporator is carried Device is standard-sized sheet or fine setting state.

7. reheating type heat pump recuperation of heat air-conditioner set according to claim 4, it is characterised in that the heat pump system in air exhaust box System part and heat pump part in wind pushing box, the heat pump part between wind pushing box pass through four refrigerant circulation house stewards Connection, they are：First circulation house steward, second circulation house steward, the 3rd circulation house steward, reheater outlet header；3rd circulation is total Main pipe rail expansion throttling device, servicing unit are carried on pipe, every reheater, which is carried, carries one in electric control valve, heat pump Respectively with a check valve on reheater outlet header, a bypass pipe, reheater outlet header, bypass pipe；Compressor air-discharging Mouth is connected with four-way reversing valve first port, and air entry is connected by servicing unit with the port of four-way reversing valve the 3rd；Condenser One end be connected with four-way reversing valve second port, the other end is connected with one end of bypass pipe, first circulation house steward；First circulation One end of house steward and the other end of condenser, one end of bypass pipe are connected, the other end and two and one end company of above reheater Connect；One end of reheater is connected by the electric control valve carried with the other end of first circulation house steward, the other end and reheater One end connection of outlet header, and be connected in parallel on bypass pipe in heat pump；One end of reheater outlet header with two and The other end of the other end connection of above reheater, the other end and bypass pipe, one end of the 3rd circulation house steward 47 are connected；Bypass pipe One end be connected with one end of first circulation house steward, the other end of condenser, the other end of the other end and reheater outlet header, One end connection of 3rd circulation house steward；One end of 3rd circulation house steward is connected with the other end of reheater outlet header, bypass pipe, Expansion throttling device, the servicing unit that the other end is carried with two and above evaporator are connected；Two and one end of above evaporator It is connected by the expansion throttling device, the servicing unit that carry with the other end of the 3rd circulation house steward, the other end and second circulation house steward One end connection；One end of second circulation house steward is changed with two and the connection of the other end of above evaporator, the other end with four-way Connected to the port of valve the 4th；When heat pump freezes, the check valve of reheater outlet header is the list on opening state, bypass pipe It is blocking state to valve, main pipe rail expansion throttling device is in standard-sized sheet or fine setting state, and the expansion throttling device that evaporator is carried is section Stream mode, when heat pump is heated, the check valve of reheater outlet header is the check valve on blocking state, bypass pipe to be open-minded State, main pipe rail expansion throttling device is in throttle, and the expansion throttling device that evaporator is carried is standard-sized sheet or fine setting state, reheating The electric control valve of device is closed, and reheater does not work.