Stable-operation solar energy-air energy double-source heat pump heating system

Abstract

The utility model discloses a solar energy-air energy double-source heat pump heating system stable in operation, which comprises a compressor, a condenser, a working medium heater and a heat storage water tank, a working medium inlet of the compressor is in fluid conduction with a working medium outlet of the working medium heater, and a working medium outlet of the compressor is in fluid conduction with a working medium inlet of the condenser; the heat storage water tank is in fluid communication with a water inlet and a water outlet of the condenser through a circulating pipeline; the heat storage water tank is in fluid communication with the water inlet and the water outlet of the working medium heater through another circulation pipeline. By means of the working medium heater, the working medium at the inlet of the compressor can be further heated to the normal working condition under the extremely cold weather condition, the compressor is prevented from running under the extreme condition, the safe and stable running state of the system can be maintained, the air source heat pump and the solar heat collection device are coupled, and the utilization limitation of a single renewable energy source is relieved; the power consumption of the system is reduced, and the renewable energy source ratio of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clean heating, and more specifically to a stably operated solar energy-air energy dual-source heat pump heating system. Background Art

[0002] Coupling solar energy and air energy to achieve clean heating of buildings not only solves the problems of intermittency and randomness of single solar hot water heating systems, but also further improves the cleanliness of heating. It is one of the effective means of energy conservation and carbon reduction in the field of building energy supply.

[0003] However, the operating status of the solar-air dual-source heat pump heating system that has been published so far still cannot get rid of its dependence on weather conditions. For example, in extremely cold weather in the north, when there is no solar radiation at night, the air source heat pump needs to operate alone. However, due to the low inlet temperature of the compressor, the compression ratio increases, power consumption increases, system efficiency decreases, and even system operation becomes unstable, the failure rate increases, and the compressor is damaged. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to provide a stably operating solar energy-air energy dual-source heat pump heating system which can improve the operating stability of the compressor in extremely cold weather.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a stably operating solar energy-air energy dual-source heat pump heating system, comprising a compressor, a condenser, a working fluid heater and a hot water storage tank, wherein the compressor working fluid inlet is fluidly connected with the working fluid outlet of the working fluid heater, and the compressor working fluid outlet is fluidly connected with the working fluid inlet of the condenser; the hot water storage tank is fluidly connected with the water inlet and outlet of the condenser through a circulation pipeline; the hot water storage tank is fluidly connected with the water inlet and outlet of the working fluid heater through another circulation pipeline; the hot water storage tank is fluidly connected with a solar energy collection cycle and a user heating cycle.

[0006] In the above-mentioned stably operating solar energy-air energy dual-source heat pump heating system, the working fluid inlet fluid of the working fluid heater is fluidly connected to the outdoor evaporator, the working fluid inlet of the outdoor evaporator is fluidly connected to an electronic expansion valve, and the working fluid inlet of the electronic expansion valve is fluidly connected to the working fluid outlet of the condenser.

[0007] The above-mentioned stably operating solar energy-air energy dual-source heat pump heating system has a condensing water pump at the bottom of the side wall of the hot water storage tank through a pipeline fluid, the water outlet of the condensing water pump is fluidly connected to the water inlet of the condenser, and the water outlet of the condenser is fluidly connected to the top of the side wall of the hot water storage tank through a pipeline fluid.

[0008] In the above-mentioned stably operating solar energy-air energy dual-source heat pump heating system, the hot water storage tank is connected to a circulating water pump through a pipeline fluid, the water outlet of the circulating water pump is connected to a working fluid heating electric regulating valve through a pipeline fluid, the water outlet of the working fluid heating electric regulating valve is fluidly connected to the water inlet of the working fluid heater through a pipeline, and the water outlet of the working fluid heater is fluidly connected to the hot water storage tank through a pipeline.

[0009] The above-mentioned stably operating solar energy-air energy dual-source heat pump heating system, the solar energy collection cycle includes a heat collection electric regulating valve and a solar thermal collector, the fluid on the heat storage tank is connected with a circulating water pump, the water outlet of the circulating water pump is fluidly connected with the water inlet of the heat collection electric regulating valve through a pipeline, the water outlet of the heat collection electric regulating valve is fluidly connected with the water inlet of the solar thermal collector, and the water outlet of the solar thermal collector is fluidly connected with the water storage tank.

[0010] The above-mentioned stably operating solar energy-air energy dual-source heat pump heating system, the user heating cycle includes the user heat load, the fluid on the hot water storage tank is connected with a circulating water pump, the water outlet of the circulating water pump is fluidly connected with the water inlet of the user heat load through a pipeline, and the water outlet of the user heat load is fluidly connected with the hot water storage tank through a pipeline.

[0011] In the above-mentioned stably operating solar energy-air energy dual-source heat pump heating system, an electric heating device is arranged in the heat storage tank.

[0012] The above-mentioned stably operating solar energy-air energy dual-source heat pump heating system has a temperature control component installed on the pipeline connected to the compressor working fluid inlet, and the water inlet of the working fluid heater is fluid-conducted with the temperature control component.

[0013] The above-mentioned stably operating solar energy-air energy dual-source heat pump heating system, the temperature control component includes an insulating shell, a connecting rod, a valve shell and a valve core, the insulating shell is penetrated by a heat exchange tube, the pipeline connected to the compressor working fluid inlet is fluid-connected with the heat exchange tube, a thermal expansion and contraction block is installed in the insulating shell, one end of the connecting rod penetrates into the insulating shell and is connected to the thermal expansion and contraction block, the other end of the connecting rod penetrates into the valve shell, the valve core sliding seal is fitted in the valve shell, the end of the connecting rod is connected to the valve core, the insulating shell and the valve shell are fixedly connected by a bracket, a conducting hole is penetrated on the valve core, and the pipelines fluid-connected with the water inlet of the working fluid heater are respectively fluid-connected with the two sides of the valve shell.

[0014] The above-mentioned stably operating solar energy-air energy dual-source heat pump heating system, the insulating shell is installed on the insulating shell, the connecting rod passes through the insulating shell, the first conductive sheet and the second conductive sheet are installed in the insulating shell, the first conductive sheet is fixedly connected to the connecting rod, and the second conductive sheet is fixedly connected to the shell bottom of the insulating shell.

[0015] The technical solution of the utility model has achieved the following beneficial technical effects:

[0016] 1. The working fluid heater can be used to further heat the compressor inlet working fluid to normal working conditions under extremely cold weather conditions, avoiding the compressor from operating under extreme conditions, which is conducive to maintaining the safe and stable operation of the system.

[0017] 2. Coupling the air source heat pump with the solar thermal collector alleviates the limitations of the use of a single renewable energy source, reduces the system's electricity consumption, and increases the proportion of renewable energy in the system.

[0018] 3. By setting the temperature control component, when the working fluid temperature at the compressor inlet is too low, the working fluid heater heating cycle is automatically started to automatically heat the working fluid entering the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the system flow of the utility model;

[0020] Figure 2 A schematic diagram of the working fluid heater of the utility model;

[0021] Figure 3 A schematic structural diagram of a temperature control component of the utility model.

[0022] The reference numerals in the figure are as follows: 1-compressor; 2-condenser; 3-electronic expansion valve; 4-outdoor evaporator; 5-heat storage tank; 6-working fluid heater; 7-condensing water pump; 8-circulating water pump; 9-heat collecting electric regulating valve; 10-solar collector; 11-working fluid heating electric regulating valve; 12-user heat load; 13-temperature control component; 131-insulating shell; 132-thermal expansion and contraction block; 133-connecting rod; 134-valve shell; 135-valve core; 136-conducting hole; 137-insulating shell; 138-first conductive sheet; 139-second conductive sheet. DETAILED DESCRIPTION

[0023] In this embodiment, a stable operation of the solar energy-air energy dual source heat pump heating system is provided. Figure 1As shown, it includes a compressor 1, a condenser 2, a working fluid heater 6 and a hot water storage tank 5. The hot water storage tank 5 is provided with an electric heating device, and electric energy is used as a supplementary energy source for the system to ensure that the water temperature in the hot water storage tank 5 is not lower than the limit value, thereby further improving the stability of the system operation. The electric heating adopts resistance heating, and the working fluid inlet of the compressor 1 is fluidly connected with the working fluid outlet of the working fluid heater 6, and the working fluid outlet of the compressor 1 is fluidly connected with the working fluid inlet of the condenser 2; the hot water storage tank 5 is fluidly connected with the inlet and outlet of the condenser 2 through a circulation pipeline; the hot water storage tank 5 is fluidly connected with the inlet and outlet of the working fluid heater 6 through another circulation pipeline; the hot water storage tank 5 is fluidly connected with a solar heat collection cycle and a user heating cycle.

[0024] like Figure 1 As shown, the working medium inlet fluid of the working medium heater 6 is fluidly connected to the outdoor evaporator 4, the working medium inlet of the outdoor evaporator 4 is fluidly connected to the electronic expansion valve 3, the working medium inlet of the electronic expansion valve 3 is fluidly connected to the working medium outlet of the condenser 2, the bottom of the side wall of the hot water storage tank 5 is fluidly connected to the condensing water pump 7 through the pipeline, the water outlet of the condensing water pump 7 is fluidly connected to the water inlet of the condenser 2, and the water outlet of the condenser 2 is fluidly connected to the top of the side wall of the hot water storage tank 5 through the pipeline, forming a heat pump working medium circulation, realizing the air energy heating process of the system, and finally storing the heat in the form of hot water in the hot water storage tank 5.

[0025] like Figure 1 As shown, the hot water storage tank 5 is connected to the circulating water pump 8 through the pipeline fluid, the water outlet of the circulating water pump 8 is connected to the working fluid heating electric regulating valve 11 through the pipeline fluid, the water outlet of the working fluid heating electric regulating valve 11 is fluidly connected to the water inlet of the working fluid heater 6 through the pipeline, and the water outlet of the working fluid heater 6 is fluidly connected to the hot water storage tank 5 through the pipeline, forming a working fluid heating cycle, using hot water to heat the working fluid, and ensuring the stability of the compressor 1 in operation in extremely cold climates.

[0026] like Figure 1 As shown, the solar thermal collection cycle includes a thermal collection electric regulating valve 9 and a solar thermal collector 10, a circulating water pump 8 is fluidly connected to the hot water storage tank 5, a water outlet of the circulating water pump 8 is fluidly connected to the water inlet of the thermal collection electric regulating valve 9 through a pipeline, a water outlet of the thermal collection electric regulating valve 9 is fluidly connected to the water inlet of the solar thermal collector 10, and a water outlet of the solar thermal collector 10 is fluidly connected to the hot water storage tank 5.

[0027] like Figure 1As shown, the user heating cycle includes a user heat load 12, and a circulating water pump 8 is fluidly connected to the hot water storage tank 5. The water outlet of the circulating water pump 8 is fluidly connected to the water inlet of the user heat load 12 through a pipeline, and the water outlet of the user heat load 12 is fluidly connected to the hot water storage tank 5 through a pipeline.

[0028] like Figure 2-3 As shown, a temperature control component 13 is installed on the pipeline connected to the working medium inlet of the compressor 1, and the water inlet of the working medium heater 6 is fluidly connected to the temperature control component 13. The temperature control component 13 includes an insulating shell 131, a connecting rod 133, a valve shell 134 and a valve core 135. A heat exchange tube is penetrated through the insulating shell 131, and the pipeline connected to the working medium inlet of the compressor 1 is fluidly connected to the heat exchange tube. A thermal expansion and contraction block 132 is installed in the insulating shell 131, one end of the connecting rod 133 penetrates into the insulating shell 131 and is connected to the thermal expansion and contraction block 132, and the other end of the connecting rod 133 penetrates into the valve shell 134, and the valve core 135 is slidably sealed and matched in the valve shell 134, and the end of the connecting rod 133 is connected to the valve core 135 is connected, the insulating shell 131 and the valve shell 134 are fixedly connected by a bracket, a conducting hole 136 is penetrated on the valve core 135, and the pipelines which are in fluid communication with the water inlet of the working medium heater 6 are respectively in fluid communication with the two sides of the valve shell 134, an insulating shell 137 is installed on the insulating shell 131, the connecting rod 133 penetrates the insulating shell 137, and a first conductive sheet 138 and a second conductive sheet 139 are installed in the insulating shell 137, the first conductive sheet 138 and the second conductive sheet 139 can be set as spring sheets to ensure that the two can remain connected when the connecting rod 133 moves, the first conductive sheet 138 is fixedly connected to the connecting rod 133, and the second conductive sheet 139 is fixedly connected to the shell bottom of the insulating shell 137.

[0029] The working principle of this utility model:

[0030] Heat pump working fluid cycle: the working fluid is compressed in the compressor 1 to form a high-temperature and high-pressure gas, which then enters the working fluid side of the condenser 2, transfers heat to the water side to heat the water, and then condenses into a liquid state; the working fluid enters the electronic expansion valve 3 to form a low-temperature liquid, and enters the outdoor evaporator 4 to form a low-temperature gas after being heated and evaporated by the outdoor air; the low-temperature gas is further heated in the working fluid heater 6 and then enters the compressor 1, thereby completing the entire cycle.

[0031] Water side cycle: This cycle includes four heat exchange cycles, namely:

[0032] (1) Under extreme conditions, when the outdoor ambient temperature is extremely low, when it is detected that the outlet temperature of the outdoor evaporator 4 is lower than the limit value, the working fluid heating electric regulating valve 11 is opened and adjusted, so that the hot water output by the circulating water pump 8 enters the hot water side of the working fluid heater 6, and heats the gas working fluid on the working fluid side of the working fluid heater 6, so that its temperature rises to the set value before entering the compressor, and the hot water after heat exchange returns to the hot water storage tank 5.

[0033] (2) When the solar radiation is sufficient during the day, the circulating water pump 8 outputs part of the hot water through the heat collection electric regulating valve 9 into the solar collector, further absorbs solar radiation energy to heat up, and then returns to the hot water storage tank 5.

[0034] (3) When the system is heating normally, the circulating water pump 8 outputs part of the hot water into the user load 12 to release heat and then returns to the hot water storage tank 5.

[0035] (4) When the heat pump unit is operating normally, hot water enters the water side of the condenser 2 from the hot water storage tank 5 through the condensing water pump 7, further absorbs the heat of the high-temperature and high-pressure gas working fluid on the working fluid side, and then returns to the hot water storage tank 5 after heating.

[0036] When the temperature control component 13 is running, when the temperature of the working fluid entering the compressor 1 is too low, the temperature inside the insulating shell 131 will be continuously lowered, the length of the thermal expansion and contraction block 132 will be reduced and the connecting rod 133 will be pulled, driving the valve core 135 to move, so that the conducting hole 136 is connected to the pipeline. The greater the thermal expansion and contraction amount of the thermal expansion and contraction block 132, the larger the conducting area between the conducting hole 136 and the pipeline, thereby increasing the hot water flow rate. Synchronously, the connecting rod 133 drives the first conductive sheet 138 to move and connect with the second conductive sheet 139 to achieve conductivity. The first conductive sheet 138 and the second conductive sheet 139 are connected to the control circuit of the working fluid heating electric regulating valve 11 to achieve automatic opening and closing of the working fluid heating electric regulating valve 11.

[0037] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A stable solar-air dual-source heat pump heating system, characterized in that: The invention comprises a compressor (1), a condenser (2), a working fluid heater (6) and a hot water storage tank (5); the working fluid inlet of the compressor (1) is fluidly connected to the working fluid outlet of the working fluid heater (6), and the working fluid outlet of the compressor (1) is fluidly connected to the working fluid inlet of the condenser (2); the hot water storage tank (5) is fluidly connected to the water inlet and outlet of the condenser (2) through a circulation pipeline; the hot water storage tank (5) is fluidly connected to the water inlet and outlet of the working fluid heater (6) through another circulation pipeline; the hot water storage tank (5) is fluidly connected to a solar heat collection cycle and a user heating cycle.

2. A stable solar-air dual-source heat pump heating system according to claim 1, characterized in that: The working fluid inlet of the working fluid heater (6) is fluidly connected to the outdoor evaporator (4), the working fluid inlet of the outdoor evaporator (4) is fluidly connected to the electronic expansion valve (3), and the working fluid inlet of the electronic expansion valve (3) is fluidly connected to the working fluid outlet of the condenser (2).

3. A stable solar-air dual-source heat pump heating system according to claim 1, characterized in that: The bottom of the side wall of the hot water storage tank (5) is connected to a condensing water pump (7) through a pipeline fluid, the water outlet of the condensing water pump (7) is connected to the water inlet of the condenser (2), and the water outlet of the condenser (2) is connected to the top of the side wall of the hot water storage tank (5) through a pipeline fluid.

4. A stable solar-air dual-source heat pump heating system according to claim 1, characterized in that: The heat storage tank (5) is fluidly connected to a circulating water pump (8) through a pipeline, the water outlet of the circulating water pump (8) is fluidly connected to a working fluid heating electric regulating valve (11) through a pipeline, the water outlet of the working fluid heating electric regulating valve (11) is fluidly connected to a water inlet of the working fluid heater (6) through a pipeline, and the water outlet of the working fluid heater (6) is fluidly connected to the heat storage tank (5) through a pipeline.

5. A stable solar-air dual-source heat pump heating system according to claim 1, characterized in that: The solar heat collection cycle comprises a heat collection electric regulating valve (9) and a solar heat collector (10); a circulating water pump (8) is fluidly connected to the heat storage tank (5); a water outlet of the circulating water pump (8) is fluidly connected to a water inlet of the heat collection electric regulating valve (9) through a pipeline; a water outlet of the heat collection electric regulating valve (9) is fluidly connected to a water inlet of the solar heat collector (10); and a water outlet of the solar heat collector (10) is fluidly connected to the heat storage tank (5).

6. A stable solar-air dual-source heat pump heating system according to claim 1, characterized in that: The user heating cycle includes a user heat load (12), a circulating water pump (8) is fluidly connected to the hot water storage tank (5), a water outlet of the circulating water pump (8) is fluidly connected to a water inlet of the user heat load (12) through a pipeline, and a water outlet of the user heat load (12) is fluidly connected to the hot water storage tank (5) through a pipeline.

7. A stable solar-air dual-source heat pump heating system according to claim 1, characterized in that: An electric heating device is arranged in the hot water storage tank (5).

8. A stable solar-air dual-source heat pump heating system according to claim 1, characterized in that: A temperature control component (13) is installed on the pipeline connected to the working medium inlet of the compressor (1), and the water inlet of the working medium heater (6) is fluidically connected to the temperature control component (13).

9. A stable solar-air dual-source heat pump heating system according to claim 8, characterized in that: The temperature control assembly (13) comprises a heat-insulating shell (131), a connecting rod (133), a valve shell (134) and a valve core (135); a heat exchange tube is provided through the heat-insulating shell (131); a pipeline connected to the working medium inlet of the compressor (1) is in fluid communication with the heat exchange tube; a heat expansion and cold contraction block (132) is installed in the heat-insulating shell (131); one end of the connecting rod (133) penetrates into the heat-insulating shell (131) and is connected to the heat expansion and cold contraction block (132); the connecting rod The other end of the connecting rod (133) penetrates into the valve housing (134), the valve core (135) is slidingly sealed in the valve housing (134), the end of the connecting rod (133) is connected to the valve core (135), the insulating shell (131) and the valve housing (134) are fixedly connected by a bracket, and a conducting hole (136) is opened through the valve core (135), and the pipeline that is in fluid communication with the water inlet of the working fluid heater (6) is respectively in fluid communication with the two sides of the valve housing (134).

10. A stable solar-air dual-source heat pump heating system according to claim 9, characterized in that: An insulating shell (137) is installed on the insulating shell (131), the connecting rod (133) passes through the insulating shell (137), and a first conductive sheet (138) and a second conductive sheet (139) are installed in the insulating shell (137), the first conductive sheet (138) is fixedly connected to the connecting rod (133), and the second conductive sheet (139) is fixedly connected to the shell bottom of the insulating shell (137).

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