CN104006574B - A kind of composite solar air source heat pump - Google Patents

Abstract

A composite solar energy air source heat pump belongs to the field of heat supply. The invention includes air source heat pump circulation system, air source heat pipe circulation system, solar heat pump circulation system, solar heat pipe circulation system, solar air source heat pump parallel circulation system, solar air source heat pipe parallel circulation system, solar air source heat pump series circulation system and solar energy Air source heat pipe series circulation system. The invention can realize the switching operation of various modes according to the solar radiation conditions and the change of the outdoor temperature, so as to achieve the purpose of making full use of various grades of solar energy and air heat energy; effectively reduce the initial investment of the heating system, and improve the efficiency of solar energy with different radiation intensities. The utilization efficiency and utilization degree of air heat energy of different temperature grades; it overcomes the defects that traditional solar water heaters cannot provide reliable hot water when solar energy is insufficient, and air source heat pumps usually can only use air heat energy and cannot effectively use solar radiation energy.

Description

A composite solar air source heat pump

technical field

The invention relates to a composite solar air source heat pump, which can make full use of renewable energy sources such as solar energy and air heat energy. According to solar radiation conditions and outdoor air temperature, heat pipe circulation and heat pump circulation of solar energy, heat pipe circulation of air source, heat pump circulation and its Reasonable switching of the combined cycle system to achieve high-efficiency heating and domestic hot water supply. This technology is especially suitable for heating in winter and domestic hot water throughout the year, and can also be used for supplementary heat of a ground source heat pump system, which belongs to the field of heating.

Background technique

Global building heating and domestic hot water consume a lot of energy. The high living standards and living habits of developed countries have caused huge demand for hot water and energy consumption, while developing countries are increasing with the development of urbanization and the improvement of living standards. Will maintain the rapid growth of hot water energy consumption. The traditional heating system is mainly based on the combustion of fossil fuels, which is not only inefficient but also seriously polluting; while the domestic hot water system mainly uses gas water heaters and electric water heaters, which has the problem of waste of energy grade. Heating and domestic hot water have increasingly become one of the key areas of concern for energy conservation, emission reduction, and smog control.

In recent years, solar water heaters and air source heat pump water heaters have been greatly developed. However, when the solar radiation is insufficient, the heating effect of the solar water heater or the heating system will be greatly reduced. Usually, a backup system is required to ensure the reliability of heating in rainy weather and when the solar radiation is poor, which reduces its energy-saving effect. In addition, the high initial investment and large installation area requirements of solar collectors are also obstacles that restrict its further large-scale application. For air source heat pump water heaters or heating systems, since their heating efficiency and heating capacity will continue to attenuate as the outside temperature decreases, their heating reliability at low temperatures will also be reduced. The current air source heat pump can only use the heat energy in the air, and cannot effectively use the solar radiation energy. In fact, although the temperature is very low in many winters, the solar radiation intensity is still sufficient to produce the required hot water.

In view of the problems that solar water heaters cannot make full use of low-radiation solar energy and air-source heat pumps cannot utilize solar radiation energy, technical solutions that combine solar energy and heat pump technology have gained more and more favor. At present, such technical solutions are mainly divided into three categories: (1) When the solar radiation is not strong enough, the low-temperature hot water produced by the solar collector is used as the heat source on the evaporation side of the water source heat pump to improve the efficiency of the collector and the efficiency of the heat pump, When the solar radiation is strong, switch to solar direct heating (such as patent CN201220382850.9). This type of scheme only improves the efficiency of the solar heat collector, and does not solve the heating problem when there is no solar energy; (2) adopt the direct expansion solar heat collector, that is, the refrigerant directly passes into the solar heat collector, which can The realization of solar direct heating and solar heat pump heating mode can reduce the power consumption of certain compressors (such as patent CN201110388936.2), but still does not solve the heating problem when there is no solar energy; (3) adopt a direct expansion solar heat collector An air-cooled evaporator and an air-cooled evaporator. When the solar radiation is sufficient, the solar energy can be directly heated, and the air source heat pump mode can be operated under the condition of no sun or weak radiation (such as patent CN201120054202.6), but this type of scheme cannot use low-radiation Solar energy also cannot realize the direct heating of air thermal energy and the joint heating of solar energy and air thermal energy, and the effective utilization degree of solar energy and air thermal energy is not high enough.

It is worth noting that when the temperature of hot water required in some cases is low or the external temperature is high (for example, when the external temperature is 30°C in summer, low-temperature hot water of 10-20°C is prepared for inter-seasonal storage of air heat energy storage), the external air heat energy can also be directly heated, but currently it is realized through the air source heat pump, resulting in high energy consumption for heating.

All in all, there is still a lot of room for improvement in the current solar heat pump and air source heat pump technical solutions in terms of making full use of solar energy with different radiation intensities and air heat energy with different temperature grades with higher efficiency. If a more reasonable technical solution and operation method is constructed by combining the respective characteristics of solar energy and air thermal energy and the characteristics of the user's heat load demand, the utilization efficiency and degree of utilization of solar energy and air thermal energy can be greatly improved.

Contents of the invention

Based on the above problems, the present invention proposes a composite solar air source heat pump, which organically combines solar energy utilization technology and air heat energy utilization technology, realizes the complementary advantages of these two renewable energy sources, and effectively reduces the initial investment of the heating system. According to solar radiation conditions and changes in outdoor air temperature, a reasonable switch is made between solar heat pipe cycle, heat pump cycle and air source heat pipe cycle, heat pump cycle and their combined cycle system to achieve efficient heating and domestic hot water supply.

The first technical scheme of the present invention is as follows:

A composite solar air source heat pump, comprising an air source heat pump and a solar heat collector; the air source heat pump includes a compressor, a condenser, a first throttle valve and an air-cooled evaporator to form an air source heat pump circulation system in sequence; its It is characterized in that: the composite solar air source heat pump also includes a first three-way valve, a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a second throttle valve; the first three-way The inlet of the valve is respectively connected with the outlet of the compressor and the outlet of the air-cooled evaporator, the outlet of the first three-way valve is connected with the condenser, the second valve is connected in parallel with the first throttle valve, the air-cooled evaporator, the first The three-way valve, the condenser, the fourth valve and the second valve constitute the air source heat pipe circulation system in sequence; the fifth valve, the solar heat collector and the first valve are connected in sequence, and are connected with the first three-way valve and the condenser in sequence A solar heat pipe cycle system is formed; the second throttle valve is connected in parallel with the fifth valve, and the second throttle valve, solar heat collector, first valve, compressor, first three-way valve and condenser form a solar heat pump cycle in sequence system; the solar heat pump circulation system and the air source heat pump circulation system constitute a solar air source heat pump parallel circulation system; the solar heat pipe circulation system and the air source heat pipe circulation system constitute a solar air source heat pipe parallel circulation system; the third valve The inlet is connected with the outlet of the solar collector, and the outlet of the third valve is connected with the inlet of the second valve; the compressor, the first three-way valve, the condenser, the second throttle valve, the solar collector, the third The valve, the first throttling valve and the air-cooled evaporator sequentially constitute a solar air source heat pump series circulation system; the first three-way valve, the condenser, the fifth valve, the solar heat collector, the third valve, the second valve and The air-cooled evaporator in turn constitutes a solar air source heat pipe series circulation system.

The second technical scheme of the present invention is as follows:

A composite solar air source heat pump, comprising an air source heat pump and a solar heat collector; the air source heat pump includes a compressor, a condenser, a first throttle valve and an air-cooled evaporator to form an air source heat pump circulation system in sequence; its It is characterized in that: the composite solar air source heat pump also includes a first three-way valve, a first valve, a second valve, a third valve, a fourth valve, a fifth valve and a second throttle valve; the first three-way The inlet of the valve is connected with the outlet of the compressor and the outlet of the solar heat collector respectively, the outlet of the first three-way valve is connected with the condenser, the solar heat collector, the first three-way valve, the condenser, the fourth valve and the second The valves constitute the solar heat pipe circulation system in turn; the second throttle valve is connected in parallel with the second valve, and the solar heat collector, compressor, first three-way valve, condenser, fourth valve and second throttle valve constitute the solar heat pipe successively. Heat pump circulation system; the fifth valve is connected in parallel with the first throttle valve, and the fifth valve, the air-cooled evaporator, the first valve, the first three-way valve and the condenser form an air source heat pipe circulation system in sequence; the solar heat pump The circulation system and the air source heat pump circulation system constitute a solar air source heat pump parallel circulation system; the solar heat pipe circulation system and the air source heat pipe circulation system constitute a solar air source heat pipe parallel circulation system; the inlet of the third valve and the air-cooled evaporator The outlet of the third valve is connected with the inlet of the second valve; the compressor, the first three-way valve, the condenser, the first throttle valve, the air-cooled evaporator, the third valve, the second throttle The valve and the solar heat collector constitute a solar air source heat pump series circulation system in sequence; the first three-way valve, the condenser, the fifth valve, the air-cooled evaporator, the third valve, the second valve and the solar heat collector constitute in sequence Solar air source heat pipe series circulation system.

In the above two technical solutions, the solar heat collector is a direct expansion solar heat collector; the condenser is a water-cooled or air-cooled heat exchanger.

In the above two technical solutions, the fourth valve can be replaced by a second three-way valve, the inlet of the second three-way valve is connected with the outlet of the condenser, and the outlet of the second three-way valve is connected with the first throttling valve respectively. The valve is connected to the inlet of the second throttle valve.

In the first technical solution, a third three-way valve can be used to replace the first valve and the third valve, the inlet of the third three-way valve is connected with the outlet of the solar collector, and the outlet of the third three-way valve They are respectively connected with the inlet of the second valve and the outlet of the air-cooled evaporator.

In the second technical solution, a third three-way valve can be used to replace the first valve and the third valve, the inlet of the third three-way valve is connected with the outlet of the air-cooled evaporator, and the outlet of the third three-way valve They are respectively connected with the inlet of the second valve and the outlet of the solar heat collector.

Compared with the existing hot water production system, the present invention has the following advantages:

① Compared with the solar water heating system, combined with the effective use of air heat energy, it can reduce the area of the solar collector and reduce the energy consumption of the auxiliary heat source; ② Compared with the air source heat pump system, combined with the effective use of solar energy, it can reduce the wind The area of the cold evaporator, and the solar collector can also act as an evaporator, making the heat pump system more efficient; ③The utilization of solar energy has multiple modes. When the solar radiation is strong, the solar heat pipe mode is used, and the heating energy efficiency is high; the solar radiation is weak When the air temperature is high, run the solar heat pump mode, which can make full use of low-radiation solar energy; ④ There are multiple modes for the use of air heat energy. When the air temperature is high, the air source heat pipe mode is run, and the heating energy efficiency is high; Heat pump mode, making full use of low-temperature air heat source; ⑤ The combination of solar energy and air heat energy also has multiple modes, heat pipe mode in parallel connection of solar energy and air source, heat pump mode in parallel connection of solar energy and air source, heat pipe mode in series connection of solar energy and air source, and solar energy Heat pump model in series with air source. In practical applications, different modes of operation should be optimized according to solar radiation conditions, changes in outdoor air temperature, and heat load requirements.

In general, the present invention organically combines solar energy and air source heat pump technology, realizes the complementary advantages of the two, and effectively reduces the initial investment and operating energy consumption of the heating system. water scheme.

Description of drawings

Fig. 1 is a schematic diagram of the structure and principle of the first technical solution of the present invention.

Fig. 2 is a schematic diagram of the structure and principle of the second technical solution of the present invention.

Fig. 3 is a schematic diagram of the solar heat pipe mode of the first technical solution provided by the present invention.

Fig. 4 is a schematic diagram of the solar heat pump mode of the first technical solution provided by the present invention.

Fig. 5 is a schematic diagram of the air source heat pipe mode of the first technical solution provided by the present invention.

Fig. 6 is a schematic diagram of the air source heat pump mode of the first technical solution provided by the present invention.

Fig. 7 is a schematic diagram of a solar-air source heat pipe parallel connection mode of the first technical solution provided by the present invention.

Fig. 8 is a schematic diagram of the solar-air source heat pump parallel mode of the first technical solution provided by the present invention.

Fig. 9 is a schematic diagram of the solar-air source heat pipe series mode of the first technical solution provided by the present invention.

Fig. 10 is a schematic diagram of the solar-air source heat pump series mode of the first technical solution provided by the present invention.

Among them: 1-first three-way valve; 2-compressor; 3-air-cooled evaporator; 4-second three-way valve; 5-condenser; 7-first throttle valve; 8-second valve; 9 -the third valve; 10-the fourth valve; 11-the second throttle valve; 12-the fifth valve; 13-solar collector; 14-the third three-way valve

detailed description

The structure and operation mode of the present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the schematic structural diagram of the first technical solution of the present invention, including an air source heat pump and a solar collector 13; the air source heat pump includes a compressor 2, a condenser 6, a first throttle valve 7 and a The cold evaporator 3 constitutes an air source heat pump cycle system in turn; the composite solar air source heat pump also includes a first three-way valve 1, a first valve 5, a second valve 8, a third valve 9, a fourth valve 10, and a fifth valve. Valve 12 and second throttle valve 11; the inlet of the first three-way valve 1 is connected to the outlet of the compressor 2 and the outlet of the air-cooled evaporator 3 respectively, and the outlet of the first three-way valve 1 is connected to the condenser 6 , the second valve 8 is connected in parallel with the first throttle valve 7, and the air-cooled evaporator 3, the first three-way valve 1, the condenser 6, the fourth valve 10 and the second valve 8 constitute an air source heat pipe circulation system in sequence; The fifth valve 12, the solar heat collector 13 and the first valve 5 are connected in sequence, and form a solar heat pipe circulation system with the first three-way valve 1 and the condenser 6 in sequence; the second throttle valve 11 and the fifth valve The valves 12 are connected in parallel, and the second throttle valve 11, the solar heat collector 13, the first valve 5, the compressor 2, the first three-way valve 1 and the condenser 6 constitute a solar heat pump circulation system in sequence; the solar heat pump circulation system and The air source heat pump circulation system constitutes a solar air source heat pump parallel circulation system; the solar heat pipe circulation system and the air source heat pipe circulation system constitute a solar air source heat pipe parallel circulation system; the entrance of the third valve 9 and the solar heat collector 13 The outlet is connected, and the outlet of the third valve 9 is connected with the inlet of the second valve 8; the compressor 2, the first three-way valve 1, the condenser 6, the second throttle valve 11, the solar collector 13, the third The valve 9, the first throttle valve 7 and the air-cooled evaporator 3 sequentially constitute a solar air source heat pump series circulation system; the first three-way valve 1, the condenser 6, the fifth valve 12, the solar heat collector 13, the first The three valves 9, the second valve 8 and the air-cooled evaporator 3 sequentially constitute a solar air source heat pipe series circulation system.

The solar heat collector 13 is a direct expansion solar heat collector; the condenser 6 is a water-cooled or air-cooled heat exchanger; the second three-way valve 4 can be used to replace the fourth valve 10, and the second three-way valve 4 can be used to replace the fourth valve 10. The inlet of the three-way valve 4 is connected with the outlet of the condenser 6, and the outlet of the second three-way valve 4 is connected with the inlets of the first throttle valve 7 and the second throttle valve 11 respectively; the third three-way valve 14 can also be used Instead of the first valve 5 and the third valve 9, the inlet of the third three-way valve 14 is connected with the outlet of the solar collector 13, and the outlet of the third three-way valve 14 is respectively connected with the inlet of the second valve 8 and the wind The outlet of the cold evaporator 3 is connected.

Fig. 2 is the schematic diagram of the structure principle of the second technical solution of the present invention, comprising an air source heat pump and a solar heat collector 13; The cold evaporator 3 constitutes an air source heat pump cycle system in turn; the composite solar air source heat pump also includes a first three-way valve 1, a first valve 5, a second valve 8, a third valve 9, a fourth valve 10, and a fifth valve. Valve 12 and the second throttle valve 11; the inlet of the first three-way valve 1 is connected with the outlet of the compressor 2 and the outlet of the solar heat collector 13 respectively, and the outlet of the first three-way valve 1 is connected with the condenser 6 , the solar heat collector 13, the first three-way valve 1, the condenser 6, the fourth valve 10 and the second valve 8 constitute a solar heat pipe circulation system in turn; the second throttle valve 11 is connected in parallel with the second valve 8, and the solar energy The heat collector 13, the compressor 2, the first three-way valve 1, the condenser 6, the fourth valve 10 and the second throttle valve 11 constitute a solar heat pump circulation system in turn; the fifth valve 12 and the first throttle valve 7 are connected in parallel, the fifth valve 12, the air-cooled evaporator 3, the first valve 5, the first three-way valve 1 and the condenser 6 constitute an air source heat pipe circulation system in turn; the solar heat pump circulation system and the air source heat pump circulation system constitute Solar air source heat pump parallel circulation system; the solar heat pipe circulation system and the air source heat pipe circulation system constitute a solar air source heat pipe parallel circulation system; the inlet of the third valve 9 is connected with the outlet of the air-cooled evaporator 3, and the third valve The outlet of 9 is connected with the inlet of the second valve 8; the compressor 2, the first three-way valve 1, the condenser 6, the first throttle valve 7, the air-cooled evaporator 3, the third valve 9, the second section The flow valve 11 and the solar heat collector 13 successively constitute a solar air source heat pump series circulation system; the first three-way valve 1, the condenser 6, the fifth valve 12, the air-cooled evaporator 3, the third valve 9, the second The valve 8 and the solar heat collector 13 sequentially constitute a solar air source heat pipe series circulation system.

The solar heat collector 13 is a direct expansion solar heat collector; the condenser 6 is a water-cooled or air-cooled heat exchanger; the second three-way valve 4 can be used to replace the fourth valve 10, and the second three-way valve 4 can be used to replace the fourth valve 10. The inlet of the three-way valve 4 is connected with the outlet of the condenser 6, and the outlet of the second three-way valve 4 is connected with the inlets of the first throttle valve 7 and the second throttle valve 11 respectively; the third three-way valve 14 can also be used Instead of the first valve 5 and the third valve 9, the inlet of the third three-way valve 14 is connected with the outlet of the air-cooled evaporator 3, and the outlet of the third three-way valve 14 is connected with the inlet of the second valve 8 and the solar energy respectively. The outlets of the heat collector 13 are connected.

Fig. 3 is a schematic diagram of the solar heat pipe mode of the first technical solution provided by the present invention. In this mode, the compressor 2 is bypassed through the switching of the three-way valve 1, the compressor 2 and the air-cooled evaporator 3 both stop running, and the second valve 8, the fourth valve 10 and the third valve 9 on the air source branch are all closed, the first throttle valve 7 and the second throttle valve 11 are also closed. The refrigerant at the outlet of the condenser 6 passes through the fifth valve 12, the solar heat collector 13, the first valve 5 and the three-way valve 1 in turn and returns to the condenser 6, and the solar energy absorbed by the solar heat collector 13 is transferred to the Condenser 6 is used for heating. This mode operates when the solar radiation is strong, relying on the thermosiphon principle to complete the cycle of the refrigerant, without energy consumption, and has high heating efficiency. In the second technical solution, the operating principle of the solar heat pipe mode is the same as that of the first technical solution.

Fig. 4 is a schematic diagram of the solar heat pump mode of the first technical solution provided by the present invention. When the solar radiation is weakened and the solar heat pipe mode cannot produce hot water at the required temperature or is not enough to drive the natural circulation of the refrigerant, the solar heat pump mode can be operated. Through the switching of the three-way valve 1, the compressor 2 is connected, the air-cooled evaporator 3 is still stopped, the second valve 8, the fourth valve 10, the third valve 9 and the fifth valve 12 on the air source branch are all closed, and the first A throttle valve 7 is also closed. The refrigerant at the outlet of the condenser 6 passes through the second throttling valve 11 , the solar heat collector 13 , the first valve 5 , the compressor 2 and the three-way valve 1 in turn, and returns to the condenser 6 . Although this mode operates when the solar radiation is not too strong, due to the high evaporation temperature of the solar heat pump circulation system, its heating COP is also high. In the second technical solution, the operating principle of the solar heat pump mode is the same as that of the first technical solution.

Fig. 5 is a schematic diagram of the air source heat pipe mode of the first technical solution provided by the present invention. When the solar radiation is weak, or in rainy weather and at night, and the temperature of the hot water required is not high (such as the supplementary heating unit produces low-temperature hot water to supplement the soil) and the outdoor temperature is high, the air source heat pipe can be operated model. In this mode, the compressor 2 is bypassed, the air-cooled evaporator 3 is turned on, the fifth valve 12, the first valve 5 and the third valve 9 on the solar branch are all closed, and the first throttle valve 7 and the second throttle valve are closed. Valve 11 is also closed. The refrigerant at the outlet of the condenser 6 passes through the fourth valve 10, the second valve 8, the air-cooled evaporator 3 and the three-way valve 1 in sequence, and then returns to the condenser 6, and transfers the heat energy of the air absorbed by the air-cooled evaporator 3 through natural circulation to the condenser 6 for heating. Since this mode relies on the principle of thermosiphon to complete the cycle of refrigerant, it only needs to consume a small amount of fan energy consumption, and it also has high heating efficiency. In the second technical solution, the operating principle of the air source heat pipe mode is the same as that of the first technical solution.

Fig. 6 is a schematic diagram of the air source heat pump mode of the first technical solution provided by the present invention. When the solar radiation is weak, or in rainy weather and at night, but not enough to start the air source heat pipe mode, the air source heat pump mode can be operated. Through the switching of the three-way valve 1, the compressor 2 is connected, the air-cooled evaporator 3 keeps running, the fifth valve 12, the first valve 5, the second valve 8 and the third valve 9 on the solar branch are all closed, and the second Throttle valve 11 is also closed. The refrigerant at the outlet of the condenser 6 passes through the fourth valve 10 , the first throttle valve 7 , the air-cooled evaporator 3 , the compressor 2 and the three-way valve 1 in sequence, and returns to the condenser 6 . The air heat energy absorbed by the air-cooled evaporator 3 is transferred to the condenser 6 for heating by natural circulation. Since this mode is only slightly less efficient at night when the temperature is very low in winter, it still has a higher heating COP when the temperature is not too low. In the second technical solution, the operating principle of the air source heat pump mode is the same as that of the first technical solution.

Fig. 7 is a schematic diagram of a solar-air source heat pipe parallel connection mode of the first technical solution provided by the present invention. During the hot summer day, the solar radiation is strong and the outdoor temperature is also high. If the required hot water temperature is not high (for example, the supplementary heating unit produces low-temperature hot water to supplement heat for the soil), you can run the solar-air source heat pipe Parallel mode. In this mode, the compressor 2 is bypassed, the air-cooled evaporator 3 is turned on, and the third valve 9 , the first throttle valve 7 and the second throttle valve 11 are closed. The refrigerant at the outlet of the condenser 6 is divided into two paths, one path sequentially passes through the fourth valve 10, the second valve 8, and the air-cooled evaporator 3, and the other path sequentially passes through the fifth valve 12, the solar heat collector 13, and the first valve 5, Then the two branches are mixed and returned to the condenser 6 through the three-way valve 1. This mode transfers the air heat energy absorbed by the air-cooled evaporator 3 and the solar energy absorbed by the solar collector 13 to the condenser 6 for heating through two parallel natural circulations, and completes the circulation of the refrigerant by relying on the thermosiphon principle. It only needs to consume a small amount of fan energy consumption, not only has high heating efficiency, but also has a large heating capacity, which can shorten the heating time. In the second technical solution, the operating principle of the solar-air source heat pipe parallel mode is the same as that of the first technical solution.

Fig. 8 is a schematic diagram of the solar-air source heat pump parallel mode of the first technical solution provided by the present invention. When the solar radiation and the outdoor air temperature are not enough to drive the natural circulation of the refrigerant, but there is still a certain amount of solar energy available, the solar-air source heat pump parallel mode can be operated. Through the switching of the three-way valve 1, the compressor 2 is connected, the air-cooled evaporator 3 keeps running, and the second valve 8, the third valve 9 and the fifth valve 12 are all closed. The refrigerant at the outlet of the condenser 6 is divided into two paths, one path passes through the fourth valve 10, the first throttle valve 7, and the air-cooled evaporator 3 in turn, and the other path passes through the second throttle valve 11, the solar heat collector 13, and the second path in turn. A valve 5, and then the two branches are mixed and returned to the condenser 6 through the compressor 2 and the three-way valve 1. This mode realizes the full use of solar energy and air heat energy through the parallel solar heat pump circulation system and air source heat pump circulation system, and has a higher heating COP and a larger heating capacity. In the second technical solution, the operating principle of the solar-air source heat pump parallel mode is the same as that of the first technical solution.

Fig. 9 is a schematic diagram of the solar-air source heat pipe series mode of the first technical solution provided by the present invention. The parallel mode of solar-air source heat pipes has certain control requirements for the distribution of refrigerant, while the distribution of refrigerants in the series mode of solar-air source heat pipes is relatively simple. In this mode, the compressor 2 is bypassed, the air-cooled evaporator 3 is turned on, the first valve 5 and the fourth valve 10 are closed, and the first throttle valve 7 and the second throttle valve 11 are also closed. The refrigerant at the outlet of the condenser 6 returns to the condenser 6 through the fifth valve 12 , the solar heat collector 13 , the third valve 9 , the second valve 8 , the air-cooled evaporator 3 and the three-way valve 1 in sequence. This mode transfers the air heat energy absorbed by the air-cooled evaporator 3 and the solar energy absorbed by the solar collector 13 to the condenser 6 for heating through the natural circulation in series, and relies on the thermosiphon principle to complete the circulation of the refrigerant. Consuming a small amount of fan energy consumption, not only has high heating efficiency, but also has a large heating capacity, which can shorten the heating time. In the second technical solution, the operating principle of the solar-air source heat pipe series mode is the same as that of the first technical solution, except that the refrigerant enters the solar heat collector 13 and the air-cooled evaporator 3 sequentially.

Fig. 10 is a schematic diagram of the solar-air source heat pump series mode of the first technical solution provided by the present invention. When solar radiation and outdoor air temperature are not enough to drive the natural circulation of the refrigerant, but there is still a certain amount of solar energy available, if the refrigerant distribution control is simple, the solar-air source heat pump series mode can be operated. Through the switching of the three-way valve 1, the compressor 2 is connected, the air-cooled evaporator 3 keeps running, and the first valve 5, the second valve 8, the fourth valve 10 and the fifth valve 12 are all closed. The refrigerant at the outlet of the condenser 6 passes through the second throttling valve 11, the solar heat collector 13, the third valve 9, the first throttling valve 7, the air-cooled evaporator 3, the compressor 2 and the three-way valve 1 to return to the condenser6. This mode realizes the full use of solar energy and air thermal energy through the solar heat pump circulation system and air source heat pump circulation system in series, and has a higher heating COP and a larger heating capacity. In the second technical solution, the operating principle of the solar-air source heat pump series mode is the same as that of the first technical solution, the only difference is that in the first technical solution, the refrigerant first enters the solar heat collector 13 and then enters the wind turbine. cold evaporator 3; and in the second technical solution, the refrigerant first enters the air-cooled evaporator 3 and then enters the solar heat collector 13.

Claims (7)

1. a composite solar air source heat pump, including air source heat pump and solar thermal collector (13)；Described air-source heat Pump comprises the air source heat pump being made up of compressor (2), condenser (6), first throttle valve (7) and wind-cooled evaporator (3) The circulatory system；It is characterized in that: described composite solar air source heat pump also include the first triple valve (1), the first valve (5), Second valve (8), the 3rd valve (9), the 4th valve (10), the 5th valve (12) and second throttle (11)；Described The entrance of the first triple valve (1) is connected with the outlet of wind-cooled evaporator (3) with the outlet of compressor (2) respectively, the first threeway The outlet of valve (1) is connected with condenser (6), and described second valve (8) is in parallel with first throttle valve (7)；Described air-cooled Evaporimeter (3), the first triple valve (1), condenser (6), the 4th valve (10) and the second valve (8) constitute air successively The source heat pipe circulatory system；Described 5th valve (12), solar thermal collector (13) and the first valve (5) are sequentially connected, and Solar heat tube circulating system is constituted successively with the first triple valve (1) and condenser (6)；Described second throttle (11) with 5th valve (12) is in parallel, second throttle (11), solar thermal collector (13), the first valve (5), compressor (2), First triple valve (1) and condenser (6) constitute the solar heat pump circulatory system successively；The described solar heat pump circulatory system with The air source heat pump circulatory system constitutes solar air source heat pumps parallel circulating system；Described solar heat tube circulating system and air The source heat pipe circulatory system constitutes solar air source heat pipe parallel circulating system；The entrance of described 3rd valve (9) and solar energy collection The outlet of hot device (13) is connected, and the outlet of the 3rd valve (9) is connected with the entrance of the second valve (8)；Described compressor (2), First triple valve (1), condenser (6), second throttle (11), solar thermal collector (13), the 3rd valve (9), One choke valve (7) and wind-cooled evaporator (3) constitute solar air source heat pumps series circulation system successively；Described first threeway Valve (1), condenser (6), the 5th valve (12), solar thermal collector (13), the 3rd valve (9), the second valve (8) Solar air source heat pipe series circulation system is constituted successively with wind-cooled evaporator (3).

2. a composite solar air source heat pump, including air source heat pump and solar thermal collector (13)；Described air-source heat Compressor (2), condenser (6), first throttle valve (7) and wind-cooled evaporator (3) that pump is comprised constitute air-source successively Heat pump circulating system；It is characterized in that: described composite solar air source heat pump also includes the first triple valve (1), the first valve (5), the second valve (8), the 3rd valve (9), the 4th valve (10), the 5th valve (12) and second throttle (11)； The entrance of described first triple valve (1) is connected with the outlet of solar thermal collector (13) with the outlet of compressor (2) respectively, The outlet of the first triple valve (1) is connected with condenser (6), solar thermal collector (13), the first triple valve (1), condenser (6), the 4th valve (10) and the second valve (8) constitute solar heat tube circulating system successively；Described second throttle (11) In parallel with the second valve (8), solar thermal collector (13), compressor (2), the first triple valve (1), condenser (6), 4th valve (10) and second throttle (11) constitute the solar heat pump circulatory system successively；Described 5th valve (12) with First throttle valve (7) is in parallel, the 5th valve (12), wind-cooled evaporator (3), the first valve (5), the first triple valve (1) The air-source heat pipe circulatory system is constituted successively with condenser (6)；The described solar heat pump circulatory system and air source heat pump cyclic system System constitutes solar air source heat pumps parallel circulating system；Described solar heat tube circulating system and air-source heat pipe circulatory system structure Become solar air source heat pipe parallel circulating system；The entrance of described 3rd valve (9) and the outlet phase of wind-cooled evaporator (3) Even, the outlet of the 3rd valve (9) is connected with the entrance of the second valve (8)；Described compressor (2), the first triple valve (1), Condenser (6), first throttle valve (7), wind-cooled evaporator (3), the 3rd valve (9), second throttle (11) and the sun Solar air source heat pumps series circulation system can be constituted successively by heat collector (13)；Described first triple valve (1), condenser (6), 5th valve (12), wind-cooled evaporator (3), the 3rd valve (9), the second valve (8) and solar thermal collector (13) depend on Secondary composition solar air source heat pipe series circulation system.

A kind of composite solar air source heat pump the most according to claim 1 and 2, it is characterised in that: described solar energy collection Hot device (13) is direct-expansion type solar energy heat collector.

A kind of composite solar air source heat pump the most according to claim 1 and 2, it is characterised in that: described condenser (6) For water-cooled or air-cooled heat exchanger.

A kind of composite solar air source heat pump the most according to claim 1 and 2, it is characterised in that: use the second threeway Valve (4) replaces the 4th valve (10), the entrance of described second triple valve (4) to be connected with the outlet of condenser (6), the The outlet of two triple valves (4) entrance with first throttle valve (7) and second throttle (11) respectively is connected.

A kind of composite solar air source heat pump the most according to claim 1, it is characterised in that: use the 3rd triple valve (14) Replace the first valve (5) and the 3rd valve (9), the entrance of described 3rd triple valve (14) and solar thermal collector (13) Outlet be connected, the outlet of the 3rd triple valve (14) respectively with the entrance of the second valve (8) and going out of wind-cooled evaporator (3) Mouth is connected.

A kind of composite solar air source heat pump the most according to claim 2, it is characterised in that: use the 3rd triple valve (14) Replace the first valve (5) and the 3rd valve (9), the entrance of described 3rd triple valve (14) and wind-cooled evaporator (3) Outlet be connected, the outlet of the 3rd triple valve (14) respectively with the entrance of the second valve (8) and going out of solar thermal collector (13) Mouth is connected.