Convection-radiation air conditioning system coupled with wind heat and air source heat pump

Abstract

The utility model discloses an air heat and air source heat pump coupled convection-radiation air conditioning system. The system is composed of a fan impeller, a transmission mechanism, an oil pump, an oil tank, a damping hole, a heat exchanger, a water tank, an evaporator, a condenser, an expansion valve, a compressor, a fan, a first capillary tube, a capillary tube radiation tail end, a water tank with the heat exchanger, various temperature and humidity sensors and a water pump. The system is characterized in that the air source heat pump is firstly used for heating a building in winter, when the air source heat pump cannot meet the heating requirement, wind power heating and the air source heat pump are used for combined heating, the wind power heating and the air source heat pump are connected in parallel through the same water tank, and when the air source heat pump frosts, the wind power heating can defrost the air source heat pump, and the indoor temperature cannot be affected. According to the system, fresh air is preheated through heat of indoor exhaust air, the energy utilization rate is well increased, the whole system directly converts wind energy into heat energy, and the energy conversion efficiency of the system is maximized.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, and in particular to a convection-radiation air conditioning system coupled with wind heat and an air source heat pump. Background Art

[0002] my country is a country with large energy reserves but also a country with large energy consumption. In order to achieve the goal of "carbon peak and carbon neutrality", low-grade energy and renewable energy should be used to the greatest extent without reducing the thermal comfort of the indoor environment. my country's use of wind energy is mostly concentrated in power generation. For some areas with rich wind energy resources, the utilization of wind energy is not high if it is only used for wind power conversion. Traditional wind energy heating is mostly converted from wind energy to electrical energy and then to thermal energy. Not only is the equipment complex and expensive, but the efficiency is also low. The efficiency of directly converting wind energy into thermal energy is much higher than that.

[0003] In winter, air source heat pumps are prone to frost when the outdoor temperature is low. Traditional air source heat pumps are defrosted by reversing the direction of a four-way valve and using reverse cycle refrigeration. The invention patent with patent number CN201110085624.4 discloses a dual-temperature high-efficiency air source heat pump unit specifically for capillary tube auxiliary heating air conditioning systems. It uses an intelligent control system to coordinate and control the work of the two refrigeration systems. It can simultaneously monitor and control the water outlet temperature and cooling and heating loads of the two refrigeration systems in real time, and has an intelligent defrosting function. This allows the temperature requirements of the system to be adjusted and met in a timely manner. This application uses the air source heat pump to defrost by reversing the direction of a four-way valve and using reverse cycle refrigeration, but this defrosting method will affect the indoor temperature. Summary of the invention

[0004] The purpose of the utility model is to provide a convection-radiation air-conditioning system coupled with wind heat and an air source heat pump, which combines wind heat with an air source heat pump and utilizes the heat stored in the wind heat to heat the refrigerant and then enter the evaporator to defrost from bottom to top, thereby ensuring continuous and stable heating of the room without affecting the indoor temperature.

[0005] In order to achieve the above purpose, the utility model is implemented by the following technical solutions:

[0006] A convection-radiation air conditioning system coupled with wind heat and air source heat pump, comprising a wind heating part, an air source heat pump unit, and a convection-radiation terminal, wherein the wind heating part and the air source heat pump unit are both connected to a first water tank 8, and the wind heating part and the air source heat pump unit are connected in parallel by connecting to the first water tank; the other end of the first water tank 8 is connected to the convection-radiation terminal. Advantages of the two in parallel: in winter, the air source heat pump unit is used first to heat the building. When the heating amount provided by it cannot meet the heating needs of the user, the wind heating is used to heat the building, or the two are used to heat the building at the same time. When the air source heat pump is frosted, the heat stored in the first water tank 8 by the wind heating can defrost the air source heat pump without affecting the indoor temperature.

[0007] The wind heating part includes a fan impeller 1, a transmission mechanism 2, an oil pump 3, an oil tank 4, a damping hole 5, a heat exchanger 6, and a first water pump 7; wherein the fan impeller 1 is connected to the transmission mechanism 2, the transmission mechanism 2 is connected to the oil pump 3, one end of the oil pump 3 is connected to the oil tank 4, the other end of the oil pump 3 is connected to the damping hole 5, the other end of the damping hole 5 is connected to the heat exchanger 6, and the outlet of the heat exchanger 6 is connected to the first water tank 8; the fan impeller 1 is arranged on the exhaust side of the evaporator 9-1 in the air source heat pump unit.

[0008] The air source heat pump unit includes an evaporator 9-1, a compressor 9-2, an expansion valve 9-3, a condenser 9-4, a four-way valve 9-5, and a second water pump 10; wherein the evaporator 9-1 is connected to the four-way valve 9-5, the four-way valve 9-5 is connected to the compressor 9-2, the outlet of the compressor 9-2 is connected to the condenser 9-4 through the four-way valve 9-5, the outlet of the condenser 9-4 is connected to the expansion valve 9-3, and the other end of the condenser 9-4 is connected to the first water tank 8;

[0009] The convection-radiation terminal includes a fresh air fan 11, an air-to-air heat exchanger 12, an exhaust fan 13, a first water temperature sensor 14, a third water pump 15, a first capillary tube 16, a second water temperature sensor 17, an electric two-way valve 18, a third water temperature sensor 19, a heat exchanger 20, a second water tank 21, a fourth water temperature sensor 22, a fourth water pump 23, a water distributor 24, a second capillary network radiation terminal 25, a water collector 26, a fifth water temperature sensor 27, and a sixth water temperature sensor 28; wherein the fresh air fan 11 and the indoor exhaust fan 13 are connected to the air-to-air heat exchanger 12 through an air duct, and the fresh air fan 11 is arranged in front of the first capillary tube 16, and the air duct is used to transport fresh air to the first capillary tube.

[0010] The water outlet of the first water tank 8 is connected to the inlet of the third water pump 15 and the electric two-way valve 18, the outlet of the third water pump 15 is connected to the water inlet of the first capillary 16, the outlet of the electric two-way valve 18 is connected to the inlet of the heat exchanger 20 in the second water tank 21, the outlet of the heat exchanger 20 in the second water tank 21 is connected to the water inlet of the fourth water pump 23, the water outlet of the fourth water pump 23 is connected to the water distributor 24; the other end of the water distributor 24 is connected to the water inlet of the second capillary network radiation end 25, the heat exchanger 20 heats the water in the water tank, the water outlet of the second capillary network radiation end 25 is connected to the inlet of the water collector 26, the outlet of the water collector 26 is connected to the return water end of the second water tank 21 with the heat exchanger 20, and the return water end of the water tank 21 with the heat exchanger is connected to the return water end of the first water tank 8.

[0011] The first water temperature sensor 14 is arranged on the pipeline between the outlet of the first water tank 8 and the inlet of the electric two-way valve 18, the second water temperature sensor 17 is arranged on the return water section pipeline of the first capillary tube 16, the third water temperature sensor 19 is arranged on the pipeline between the outlet of the electric two-way valve 18 and the inlet of the second water tank 21, the fourth water temperature sensor 22 is arranged on the pipeline between the outlet of the second water tank 21 and the fourth water pump 23, the fifth water temperature sensor 27 is arranged on the pipeline between the outlet of the water collector 26 and the return water end of the second water tank 21, the sixth water temperature sensor 28 is arranged on the return water section pipeline between the first water tank 8 and the second water tank 21, the air supply temperature and humidity sensor 29 is arranged near the air supply outlet for monitoring the air supply status, and the indoor temperature and humidity sensor 30 is arranged in the air-conditioned room for monitoring the room temperature and humidity conditions. The first water temperature sensor 14, the second water temperature sensor 17, the third water temperature sensor 19, the fourth water temperature sensor 22, the fifth water temperature sensor 27, the sixth water temperature sensor 28, the air supply temperature and humidity sensor 29, the indoor temperature and humidity sensor 30 are connected to the external controller 31 through a line. The external controller 31 is connected to the electric two-way valve, the water pump and the fan line. The system is provided with a controller 31, and the speed of the electric two-way valve, the water pump and the fan is controlled by the data monitored by the temperature sensor and the temperature and humidity sensor to realize the switching of different operation modes of the system. The water pump is a variable frequency circulating water pump.

[0012] The utility model has the beneficial effects of utilizing the wind-heating part to generate heat, transferring the generated heat to the water tank through the heat exchanger for building heating, thereby solving the problem of low efficiency of energy conversion form in which wind energy is converted into electrical energy and then into thermal energy. In winter, the evaporator of the air source heat pump unit absorbs low-temperature heat energy from the outside air, wherein the low-temperature and low-pressure refrigerant is converted into high-temperature and high-pressure gas after passing through the compressor, and the high-temperature and high-pressure refrigerant enters the condenser to exchange heat with hot water, thereby increasing the water temperature, and the high-temperature and high-pressure refrigerant is converted into high-pressure liquid after passing through the condenser. The pressure of the refrigerant is rapidly reduced through the expansion valve, so that it becomes a low-temperature and low-pressure state and then enters the evaporator for recirculation. When the air source heat pump is frosted, the refrigeration mode is turned on through the four-way valve, and the heat stored in the first water tank by wind-heating is used to make the refrigerant enter the evaporator from bottom to top for defrosting after being heated, which can ensure continuous and stable heating of the room. When the outdoor wind is insufficient, the fan impeller absorbs the air volume of the fan exhaust of the heat pump unit to rotate the fan impeller and perform wind-heating. The controller controls the speed of each water pump, electric two-way valve and fan according to the measurement results of the temperature and humidity sensors to implement different operation strategies to meet the comfort requirements of indoor occupants, and preheats the fresh air with the energy of exhaust air, saving energy; it provides a new type of air-conditioning system for wind-rich areas and small residential buildings in suburban areas, making full use of thermal energy and renewable energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a system flow chart of the utility model;

[0014] Figure 1 There are: fan impeller 1, transmission mechanism 2, oil pump 3, oil tank 4, damping hole 5, heat exchanger 6, first water pump 7, first water tank 8, air source heat pump unit 9, evaporator 9-1, compressor 9-2, expansion valve 9-3, condenser 9-4, four-way valve 9-5, second water pump 10, fresh air fan 11, air-air heat exchanger 12, exhaust fan 13, first water temperature sensor 14, third water pump 15, first capillary 16, second water temperature sensor 17, electric two-way valve 18, third water temperature sensor 19, heat exchanger 20, second water tank 21, fourth water temperature sensor 22, fourth water pump 23, water distributor 24, second capillary network radiation end 25, water collector 26, fifth water temperature sensor 27, sixth water temperature sensor 28, air supply temperature and humidity sensor 29, indoor temperature and humidity sensor 30, controller 31. DETAILED DESCRIPTION

[0015] Combined with Figure 1 The specific implementation mode of the utility model is further described. Example

[0016] A convection-radiation air-conditioning system coupled with wind heat and an air source heat pump comprises a wind heating part, an air source heat pump unit and a convection-radiation terminal, wherein the wind heating part and the air source heat pump unit are both connected to a first water tank 8, and the wind heating part and the air source heat pump unit are connected in parallel by connecting to the first water tank; the other end of the first water tank 8 is connected to the convection-radiation terminal.

[0017] In the wind-heating part, the fan impeller 1 drives the transmission mechanism 2, the transmission mechanism is connected to the oil pump 3, one end of the oil pump is connected to the oil tank 4, the other end of the oil pump 3 is connected to the damping hole 5, the other end of the damping hole 5 is connected to the heat exchanger 6, and the outlet of the heat exchanger 6 is connected to the first water tank 8; the hydraulic oil therein is sucked into the pump cavity through the oil pump 3, so that the oil stays in the pump cavity for stirring, and the pressurized liquid oil is ejected at a high speed through the damping hole 5 and generates heat, and the friction between the fluids and the friction between the fluids and the pipe wall converts the kinetic energy carried by the fluid into heat energy. Then the generated heat is transferred to the water tank 8 through the heat exchanger 6.

[0018] The fan impeller 1 is arranged on the exhaust side of the evaporator 9-1 in the air source heat pump unit.

[0019] In the air source heat pump unit, in winter, the evaporator 9-1 absorbs low-temperature heat energy from the outside air, wherein the low-temperature and low-pressure refrigerant is converted into high-temperature and high-pressure gas after passing through the compressor 9-2, and the high-temperature and high-pressure refrigerant enters the condenser 9-4 to exchange heat with hot water, thereby increasing the water temperature, and the high-temperature and high-pressure refrigerant is converted into high-pressure liquid after passing through the condenser. The pressure of the refrigerant is rapidly reduced through the expansion valve 9-3, so that it becomes a low-temperature and low-pressure state and then enters the evaporator 9-1 for recirculation.

[0020] In the convection-radiation terminal part, the first capillary 16 and the fresh air fan 11, the exhaust fan 13 and the capillary network radiation terminal 25 are operated simultaneously, that is, the three water pumps 15, the fourth water pump 23 and the electric two-way valve 18 are opened at the same time, and the hot water is divided into two paths from the outlet of the first water tank. One path is supplied to the first capillary 16 for processing fresh air. The air supply through the fresh air fan is mainly used to meet people's demand for fresh air in winter. At this time, the fresh air only bears the fresh air load; the other path is supplied to the heat exchanger for heat exchange to reduce the water temperature and then sent to the capillary network radiation terminal 25 for processing the indoor heat load. When the heat load of the air-conditioned room increases sharply, the wind-driven heating and air source heat pump unit are turned on, and the water temperature is increased by increasing the transmission speed of the fan impeller and the circulating water volume of the air source heat pump to be used for the first capillary and the fresh and exhaust fans and the capillary network radiation terminal to process the sharply increased indoor heat load. When the indoor temperature reaches the set requirements or needs such as sleep, the first capillary and the new exhaust fan can stop working, and only the capillary network radiation terminal is turned on for operation. When the indoor temperature and humidity measured by the indoor temperature and humidity sensor 30 are low, the fan speed needs to be increased to increase the supply of hot water and the air supply until the air supply state parameters measured by the air supply temperature and humidity sensor 29 meet the requirements of the indoor operating condition adjustment at this time; when the indoor temperature and humidity measured by the indoor temperature and humidity sensor are high, the fan speed is reduced to reduce the supply of hot water and the air supply.

[0021] In winter, the air source heat pump is first used to heat the building. When the outlet water temperature of the first water tank 8 is ≥45°C, the controller 31 starts the second water pump 10. When the outlet water temperature is <45°C, the air source heat pump cannot meet the heating demand of the building. The controller 31 starts the first water pump 7 and the second water pump 10, so that the wind-driven heating and air source heat pump are combined for heating. When the wind force is insufficient, the fan impeller 1 absorbs the exhaust air volume of the fan of the heat pump unit to rotate the fan impeller and perform wind-driven heating. When the air source heat pump is frosted, the cooling mode is turned on through the four-way valve, and the heat stored in the first water tank 8 by wind-driven heating is used to heat the refrigerant and then enter the evaporator for defrosting from bottom to top, thereby ensuring continuous and stable heating of the room.

[0022] In winter, the air source heat pump unit provides hot water at 45°C, which enters the hot water distribution network and then enters the first water tank 8. The outlet of the first water tank 8 is divided into two paths, one of which is connected to the inlet of the first capillary 16, and the other is connected to the heat exchanger 20. The branch is also provided with an electric two-way valve 18 and a third water temperature sensor 19. The heat exchanger 20 is arranged in the second water tank 21, and the outlet end of the heat exchanger 20 is connected to the water divider 24 of the capillary network radiation end 25; the indoor exhaust air and the outdoor fresh air enter the air-air heat exchanger 12 through the exhaust fan 13 and the fresh air fan 11 respectively, and the outdoor fresh air is preheated with the heat of the indoor exhaust air, and the preheated fresh air is heated and sent to the room through the first capillary 16. The water pump is a variable frequency circulating water pump.

[0023] Furthermore, the controller 31 can control the water volume of the water pump according to the measurement results of the six water temperature sensors to change the temperature of the pipeline, and control the speed of each water pump, electric two-way valve and fan according to the measurement results of the supply air temperature and humidity sensor 29 and the indoor temperature and humidity sensor 30 to implement different operating strategies to meet the comfort requirements of indoor personnel.

Claims

1. A convection-radiation air conditioning system coupled with wind heat and air source heat pump, comprising a wind heating part, an air source heat pump unit, and a convection-radiation terminal, characterized in that: The wind-powered heating part and the air-source heat pump unit are both connected to the first water tank, and the wind-powered heating part and the air-source heat pump unit are connected in parallel by connecting to the first water tank; the other end of the first water tank is connected to the convection-radiation terminal.

2. A convection-radiation air conditioning system coupled with wind heat and air source heat pump according to claim 1, characterized in that: The wind-driven heating part comprises a fan impeller (1), a transmission mechanism (2), an oil pump (3), an oil tank (4), a damping hole (5), a heat exchanger (6), and a first water pump (7), wherein the fan impeller (1) is connected to the transmission mechanism (2), the transmission mechanism (2) is connected to the oil pump (3), one end of the oil pump (3) is connected to the oil tank (4), the other end of the oil pump (3) is connected to the damping hole (5), the other end of the damping hole (5) is connected to the heat exchanger (6), and the outlet of the heat exchanger (6) is connected to the first water tank (8); the fan impeller (1) is arranged on the exhaust side of the evaporator (9-1) in the air source heat pump unit.

3. A convection-radiation air conditioning system coupled with wind heat and air source heat pump according to claim 1, characterized in that: The air source heat pump unit comprises an evaporator (9-1), a compressor (9-2), an expansion valve (9-3), a condenser (9-4), a four-way valve (9-5), and a second water pump (10), wherein the evaporator (9-1) is connected to the four-way valve (9-5), the four-way valve (9-5) is connected to the compressor (9-2), the outlet of the compressor (9-2) is connected to the condenser (9-4) through the four-way valve (9-5), the outlet of the condenser (9-4) is connected to the expansion valve (9-3), and the other end of the condenser (9-4) is connected to the first water tank (8).

4. A convection-radiation air conditioning system coupled with wind heat and air source heat pump according to claim 1, characterized in that: The convection-radiation terminal comprises: a fresh air fan (11), an air-to-air heat exchanger (12), an exhaust fan (13), a first water temperature sensor (14), a third water pump (15), a first capillary tube (16), a second water temperature sensor (17), an electric two-way valve (18), a third water temperature sensor (19), a heat exchanger (20), a second water tank (21), a fourth water temperature sensor (22), a fourth water pump (23), a water distributor (24), a second capillary network radiation terminal (25), a water collector (26), a fifth water temperature sensor (27), and a sixth water temperature sensor (28); wherein the fresh air fan (11) and the indoor exhaust fan (13) are connected to the air-to-air heat exchanger (12) via an air duct; a fresh air fan (11) is arranged in front of the first capillary tube (16) and is used to transport fresh air to the first capillary tube via the air duct; a water outlet of the first water tank (8) is connected to the third water pump (15) and the electric two-way valve (18); The inlet of the electric two-way valve (18) is connected, the outlet of the third water pump (15) is connected to the water inlet of the first capillary tube (16), the outlet of the electric two-way valve (18) is connected to the inlet of the heat exchanger (20) in the second water tank (21), the outlet of the heat exchanger (20) in the second water tank (21) is connected to the water inlet of the fourth water pump (23), the water outlet of the fourth water pump (23) is connected to the water distributor (24); the water distributor (24) The other end is connected to the water inlet of the second capillary network radiation end (25), the heat exchanger (20) heats the water in the water tank, the water outlet of the second capillary network radiation end (25) is connected to the inlet of the water collector (26), the outlet of the water collector (26) is connected to the return water end of the second water tank (21) with the heat exchanger (20), and the return water end of the water tank (21) with the heat exchanger is connected to the return water end of the first water tank (8); The first water temperature sensor (14) is arranged on the pipeline between the outlet of the first water tank (8) and the inlet of the electric two-way valve (18), the second water temperature sensor (17) is arranged on the return water section pipeline of the first capillary tube (16), the third water temperature sensor (19) is arranged on the pipeline between the outlet of the electric two-way valve (18) and the inlet of the second water tank (21), the fourth water temperature sensor (22) is arranged on the pipeline between the outlet of the second water tank (21) and the fourth water pump (23), the fifth water temperature sensor (27) is arranged on the pipeline between the outlet of the water collector (26) and the return water end of the second water tank (21), the sixth water temperature sensor (28) is arranged on the return water section pipeline between the first water tank (8) and the second water tank (21), the indoor temperature and humidity sensor (30) is arranged in the air-conditioned room, and the water temperature sensor, the temperature and humidity sensor and the external controller (31) are connected through a line.

5. A convection-radiation air conditioning system coupled with wind heat and air source heat pump according to any one of claims 2 to 4, characterized in that: The water pump is a variable frequency circulating water pump.

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